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IEEE Standard Requirements for Overhead, Pad-Mounted, Dry-Vault, and Submersible Automatic Line Sectionalizers for Alternating Current Systems Up to 38 kV

IEEE Power and Energy Society Sponsored by the Switchgear Committee

IEEE 3 Park Avenue New York, NY 10016-5997 USA

IEEE Std C37.63™-2013 (Revision of IEEE Std C37.63-2005)

26 April 2013

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IEEE Std C37.63™-2013 (Revision of IEEE Std C37.63-2005)

IEEE Standard Requirements for Overhead, Pad-Mounted, Dry-Vault, and Submersible Automatic Line Sectionalizers for Alternating Current Systems Up to 38 kV Sponsor

IEEE Switchgear Committee of the

IEEE Power and Energy Society Approved 6 March 2013

IEEE-SA Standards Board

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Abstract: Required definitions, ratings, procedures for performing design tests and production tests, constructional requirements, and application considerations for overhead and padmounted, dry-vault, and submersible automatic line sectionalizers for ac systems are specified. Keywords: automatic line sectionalizers, cutout type, dry-vault, IEEE C37.63TM, pad-mounted, sectionalizers, submersible 

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ISBN 978-0-7381-8327-5 ISBN 978-0-7381-8328-2

STD98185 STDPD98185

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Participants At the time this IEEE standard was completed, the C37.63 Sectionalizer Working Group had the following membership: David T. Stone, Chair Craig Befus, Vice Chair Peter Agliata Chris Ambrose Robert Behl Antone Bonner Eldridge Byron Gilbert Carmona Frank DeCesaro

Leslie Falkingham Mietek Glinkowski Gary Haynes Edward Jankowich Chris Lettow Steve Meiners Sachin Puranik

Larry Putman Timothy Royster R. Kirkland Smith Francois Soulard James Swank Nenad Uzelac Jan Zawadzki

The following members of the individual balloting committee voted on this standard. Balloters may have voted for approval, disapproval, or abstention. William Ackerman S. Aggarwal Chris Ambrose Thomas Barnes Craig Befus Robert Behl Wallace Binder Antone Bonner Harvey Bowles Ted Burse Eldridge Byron Thomas Callsen Paul Cardinal Glenn Davis Frank DeCesaro Gary Donner Randall Dotson Edgar Dullni Gary Engmann Leslie Falkingham Marcel Fortin Paul Found Fredric Friend David Gilmer Mietek Glinkowski

Robert Goodin Edwin Goodwin Randall Groves Jerry Harness Timothy Hayden Gary Haynes Jeffrey Helzer Gary Heuston Joseph Jancauskas Edward Jankowich Andrew Jones Joseph Koepfinger Jim Kulchisky Chung-Yiu Lam Michael Lauxman John Leach Greg Luri William McBride Nigel McQuin Steve Meiners Peter Meyer Georges Montillet Michael S. Newman Joe Nims Ted Olsen Lorraine Padden

Donald Parker Larry Putman Moises Ramos Reynaldo Ramos Michael Roberts Charles Rogers Thomas Rozek Bartien Sayogo Gil Shultz James Smith Jeremy Smith Jerry Smith R. Kirkland Smith Francois Soulard Gary Stoedter David T. Stone James Swank John Vergis Ilia Voloh William Walter Steven Whalen Kenneth White Jian Yu Janusz Zawadzki Matthew Zeedyk

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When the IEEE-SA Standards Board approved this standard on 6 March 2013, it had the following membership: John Kulick, Chair David L. Law, Vice Chair Richard Hulett, Past Chair Konstantinos Karachalios, Secretary Masayuki Ariyoshi Peter Balma Farooq Bari Ted Burse Wael William Diab Stephen Dukes Jean-Philippe Faure

Alex Gelman Mark Halpin Gary Hoffman Paul Houzé Jim Hughes Mike Janezic Joseph Koepfinger* Oleg Logvinov

Ron Petersen Gary Robinson Jon Rosdahl Adrian Stephens Yatin Trivedi Phil Winston Yu Yuan

*Member Emeritus

Also included are the following nonvoting IEEE-SA Standards Board liaisons: Dick DeBlasio, DOE Representative Mike Janezic, NIST Representative Don Messina IEEE Standards Program Manager, Document Development Erin Spiewak IEEE Standards Program Manager, Technical Program Development

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Introduction This introduction is not part of IEEE Std C37.63-2013, IEEE Standard Requirements for Overhead, Pad-Mounted, DryVault, and Submersible Automatic Line Sectionalizers for Alternating Current Systems Up to 38 kV.

This standard has been revised and updated from the 2005 revision of IEEE Std C37.63. This revision incorporates significant improvements that reflect the present state of the art in automatic line sectionalizers. These improvements include changes and additions in the following areas: 

The term sectionalizer has been restored to the definition in IEEE Std C37.100™.



Replacing reference to IEEE Std 1247™-1998 by adopting reference to IEEE Std C37.100.1™ or by incorporating specifications within this document.



Restricted fault-making current rating to devices that have independent manual operation, in 5.102.



General structure of the document has been made compatable with IEEE Std C37.100.1.



Revised limits of temperature and temperature rise to be consistent with common requirements IEEE Std C37.100.1 and the circuit breaker standard, IEEE Std C37.04™.



Radio influence voltage test has been deleted.



Partial discharge tests have been aligned with IEEE Std C37.60™-2012 (IEEE/IEC dual logo).



Added ice loading tests.

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Contents 1. Overview .................................................................................................................................................... 1  1.1 Scope ................................................................................................................................................... 1  1.2 Purpose ................................................................................................................................................ 1  2. Normative references.................................................................................................................................. 2  3. Definitions .................................................................................................................................................. 3  4. Normal (usual) and special (unusual) service conditions ........................................................................... 3  4.1 Normal (usual) service conditions ....................................................................................................... 3  4.2 Special (unusual) service conditions.................................................................................................... 4  5. Ratings........................................................................................................................................................ 4  5.1 Rating information............................................................................................................................... 4  5.2 Rated maximum voltage (V)................................................................................................................ 5  5.3 Rated insulation level .......................................................................................................................... 7  5.4 Rated power-frequency (f r ) ................................................................................................................. 7  5.5 Rated continuous (normal) current and temperature rise..................................................................... 7  5.6 Rated short-time withstand current (I k ) ............................................................................................... 7  5.7 Rated peak withstand current (I p ) ........................................................................................................ 7  5.8 Rated duration of short-circuit (t k ) ...................................................................................................... 7  5.9 Rated supply voltage of closing and opening devices and of auxiliary and control circuits (U a ) ....... 8  5.10 Rated supply frequency of closing and opening devices and of auxiliary circuits ............................ 8  5.11 Rated pressure of compressed gas supply for insulation and/or operation ........................................ 8  5.12 Rated filling levels for insulation and/or operation. .......................................................................... 8  5.101 Preferred minimum actuating current ratings (series coil sectionalizers) ........................................ 8  5.102 Preferred fault-making current rating .............................................................................................. 8  5.103 Rated load-switching current........................................................................................................... 9  5.104 Rated unloaded transformer switching current ................................................................................ 9  5.105 Preferred line charging and cable charging current ratings ............................................................. 9  6. Design and construction ............................................................................................................................. 9  6.1 Requirements for liquids in sectionalizers........................................................................................... 9  6.2 Requirements for gases in sectionalizers ........................................................................................... 10  6.3 Grounding provisions ........................................................................................................................ 10  6.4 Auxiliary and control equipment ....................................................................................................... 10  6.5 Dependent power operation............................................................................................................... 10  6.6 Stored energy operation..................................................................................................................... 10  6.7 Independent manual operation........................................................................................................... 10  6.8 Operation of releases ......................................................................................................................... 10  6.9 Low- and high-pressure interlocking and monitoring devices........................................................... 10  6.10 Nameplate markings ........................................................................................................................ 10  6.11 Interlocking devices......................................................................................................................... 12  6.12 Position/charge indicators................................................................................................................ 12  6.13 X-ray emission................................................................................................................................. 12  6.101 Counters......................................................................................................................................... 12  6.102 Instruction...................................................................................................................................... 12  6.103 Conductor terminal ........................................................................................................................ 13  6.104 Tank construction .......................................................................................................................... 13  6.105 Manual operating provision ........................................................................................................... 13 

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7. Design (type) tests .................................................................................................................................... 14  7.1 General conditions for tests ............................................................................................................... 14  7.2 Insulation (dielectric) tests................................................................................................................. 17  7.3 Radio influence voltage tests (RIV)................................................................................................... 19  7.4 Measurement of the resistance of circuits.......................................................................................... 19  7.5 Temperature rise test ......................................................................................................................... 20  7.6 Short-time withstand current and peak withstand current tests ......................................................... 21  7.7 Verification of the degrees of protection provided by enclosures ..................................................... 22  7.8 Tightness tests.................................................................................................................................... 22  7.9 Electromagnetic compatibility tests................................................................................................... 22  7.10 Additional tests on auxiliary and control circuits ............................................................................ 22  7.11 X-radiation test procedure for vacuum interrupters......................................................................... 22  7.101 Switching tests............................................................................................................................... 23  7.102 Fault-making tests.......................................................................................................................... 24  7.103 Condition of the sectionalizer after switching tests, short-time withstand current tests, and fault-making current tests ............................................................................................................. 24  7.104 Mechanical operation tests ............................................................................................................ 25  7.105 Partial discharge tests .................................................................................................................... 26  7.106 Operating duty tests ....................................................................................................................... 27  7.107 Surge current test—series coil sectionalizers................................................................................. 29  7.108 Control electronic elements surge withstand capability tests ........................................................ 30  7.109 Minimum actuating current tests ................................................................................................... 30  7.110 Ice loading test............................................................................................................................... 30  8. Production tests (routine tests) ................................................................................................................. 34  8.1 General .............................................................................................................................................. 34  8.2 Dielectric withstand test; one minute dry power-frequency .............................................................. 34  8.3 Tests on auxiliary and control circuits............................................................................................... 34  8.4 Tightness tests.................................................................................................................................... 34  8.101 Operational calibration .................................................................................................................. 35  8.102 Partial discharge test ...................................................................................................................... 35  8.103 Mechanical tests ............................................................................................................................ 35  Annex A (informative) X/R ratios ............................................................................................................... 36  A.1 General.............................................................................................................................................. 36  A.2 Time constant  and X/R ratio........................................................................................................... 36  A.3 Asymmetrical fault current ............................................................................................................... 36  Annex B (normative) Ratings for series coil sectionalizers.......................................................................... 38  B.1 Rating information ............................................................................................................................ 38  B.2 Series coil sectionalizer ratings......................................................................................................... 38  Annex C (informative) Bibliography............................................................................................................ 40 

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IEEE Std C37.63-2013 IEEE Standard for Requirements for Overhead, Pad-Mounted, Dry-Vault, and Submersible Automatic Line Sectionalizers for Alternating Current Systems Up to 38 kV

IEEE Standard for Requirements for Overhead, Pad-Mounted, Dry-Vault, and Submersible Automatic Line Sectionalizers for Alternating Current Systems Up to 38 kV IMPORTANT NOTICE: IEEE Standards documents are not intended to ensure safety, health, or environmental protection, or ensure against interference with or from other devices or networks. Implementers of IEEE Standards documents are responsible for determining and complying with all appropriate safety, security, environmental, health, and interference protection practices and all applicable laws and regulations. This IEEE document is made available for use subject to important notices and legal disclaimers. These notices and disclaimers appear in all publications containing this document and may be found under the heading “Important Notice” or “Important Notices and Disclaimers Concerning IEEE Documents.” They can also be obtained on request from IEEE or viewed at http://standards.ieee.org/IPR/disclaimers.html.

1. Overview

1.1 Scope This standard applies to all overhead, pad-mounted, dry-vault, and submersible single-pole or multipole alternating-current automatic line sectionalizers for rated maximum voltages above 1 kV and up to 38 kV. Voltages above 38 kV shall be considered special applications. In order to simplify the terminology in this standard, the term sectionalizer has been substituted for automatic line sectionalizer wherever possible.

1.2 Purpose The purpose of this standard is to describe the requirements for sectionalizers. Qualification to this standard should give reasonable assurance to the user that equipment meeting the requirements of this standard will perform in a satisfactory manner, provided that it has been properly selected for the intended application and is installed in accordance with the manufacturer’s recommendations. 1

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IEEE Std C37.63-2013 IEEE Standard for Requirements for Overhead, Pad-Mounted, Dry-Vault, and Submersible Automatic Line Sectionalizers for Alternating Current Systems Up to 38 kV

2. Normative references The following referenced documents are indispensable for the application of this document (i.e., they must be understood and used, so each referenced document is cited in text and its relationship to this document is explained). For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments or corrigenda) applies. ANSI C37.85, American National Standard for Switchgear—AC High-Voltage Power Vacuum Interrupters— Safety Requirements for X-Radiation Limits. 1 IEC 60502, Power Cables with Extruded Insulation and Their Accessories for Rated Voltages from 1 kV (Um = 1,2 kV) up to 30 kV (Um = 36 kV). 2 IEEE Std 4TM, IEEE Standard Techniques for High-Voltage Testing. 3, 4 IEEE Std 386TM, IEEE Standard for Separable Insulated Connector Systems for Power Distribution Systems Above 600 V. IEEE Std 1247TM-2005, IEEE Standard for Interrupter Switches for Alternating Current, Rated Above 1000 V. IEEE Std C37.09 TM-1999, IEEE Standard Test Procedure for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis. IEEE Std C37.42™, IEEE Standard Specifications for High-Voltage (> 1000 V) Expulsion-Type DistributionClass Fuses, Fuse and Disconnecting Cutouts, Fuse Disconnecting Switches, and Fuse Links and Accessories Used with These Devices. IEEE/ISO/IEC Std C37.60-2012, High-Voltage Switchgear and Controlgear—Part 111: Automatic Circuit Reclosers and Fault Interrupters for Alternating Current Systems up to 38 kV. IEEE Std C37.100™, IEEE Standard Definitions for Power Switchgear. IEEE Std C37.100.1™-2007, IEEE Standard of Common Requirements for High Voltage Power Switchgear Rated Above 1000 V. IEEE Std C37.301™, IEEE Standard for High-Voltage Switchgear (Above 1000 V) Tests Techniques—Partial Discharge Measurements. IEEE Std C57.12.28™-2005, IEEE Standard for Pad-Mounted Equipment—Enclosure Integrity. IEEE Std C57.12.32™, IEEE Standard for Submersible Equipment—Enclosure Integrity.

1 ANSI publications are available from the Sales Department, American National Standards Institute, 25 West 43rd Street, 4th Floor, New York, NY 10036, USA (http://www.ansi.org/). 2 IEC publications are available from the Sales Department of the International Electrotechnical Commission, Case Postale 131, 3, rue de Varembé, CH-1211, Genève 20, Switzerland/Suisse (http://www.iec.ch/). IEC publications are also available in the United States from the Sales Department, American National Standards Institute, 25 West 43rd Street, 4th Floor, New York, NY 10036, USA (http://www.ansi.org/). 3 IEEE publications are available from the Institute of Electrical and Electronics Engineers, Inc., 445 Hoes Lane, P.O. Box 1331, Piscataway, NJ 08855-1331, USA (http://standards.ieee.org/). 4 The IEEE standards or products referred to in this clause are trademarks of the Institute of Electrical and Electronics Engineers, Inc.

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IEEE Std C37.63-2013 IEEE Standard for Requirements for Overhead, Pad-Mounted, Dry-Vault, and Submersible Automatic Line Sectionalizers for Alternating Current Systems Up to 38 kV

3. Definitions For the purposes of this document, the following terms and definitions apply. The IEEE Standards Dictionary Online should be consulted for terms not defined in this clause. 5 An asterisk (*) indicates that at the time this standard was approved, there were no corresponding definitions in IEEE Std C37.100. automatic line sectionalizer: A self-contained circuit-opening device that automatically opens the main electrical circuit through it after sensing and responding to a predetermined number of successive main current impulses equal to or greater than a predetermined magnitude. It opens while the main electrical circuit is de-energized. It may also have provision to be manually operated to interrupt loads. cutout type sectionalizers: An automatic line sectionalizer, typically single-phase, that is very similar in outward appearance to a distribution open dropout type fuse cutout and is used in a distribution cutout fuse support (mounting).* NOTE—Cutout type sectionalizers usually have ratings that are associated with the distribution cutout mounting in which they are applied. 6

minimum actuating current: The minimum actuating current of sectionalizers is the minimum rms (root-meansquare) current that actuates a counting operation or an automatic operation.* non-sustained disruptive discharge (NSDD): Disruptive discharge associated with current interruption that does not result in the resumption of power frequency current or, in the case of capacitive current interruption, does not result in current in the main load circuit. series coil sectionalizer: A sectionalizer in which main circuit current impulses above a specified value, flowing through a solenoid or operating coil, provide the energy required to operate the counting mechanism.

4. Normal (usual) and special (unusual) service conditions Clause 2 of IEEE Std C37.100.1™-2007 applies.

4.1 Normal (usual) service conditions Subclause 2.1 of IEEE Std C37.100.1-2007 applies. 4.1.1 Indoor switchgear Subclause 2.1.1 of IEEE Std C37.100.1-2007 applies.

5

IEEE Standards Dictionary Online subscription is available at: http://www.ieee.org/portal/innovate/products/standard/standards_dictionary.html. 6 Notes in text, tables, and figures are given for information only and do not contain requirements needed to implement this standard.

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IEEE Std C37.63-2013 IEEE Standard for Requirements for Overhead, Pad-Mounted, Dry-Vault, and Submersible Automatic Line Sectionalizers for Alternating Current Systems Up to 38 kV

4.1.2 Outdoor switchgear Subclause 2.1.2 of IEEE Std C37.100.1-2007 applies with the following addition. i)

Flooding

A Submersible Automatic Line Sectionalizer (subsurface or vault) that is installed in a below-grade enclosure may be subject to occasional flooding to a depth not exceeding 3 m above the top of the switchgear. Exposure to chemical or electrochemical reactions may be encountered in a below-grade environment. The below-grade environment may contain chemicals that contribute to mild corrosive reactions. j)

Icing conditions

The ice coating shall be considered in the range from 1 mm up to, but not exceeding, 20 mm.

4.2 Special (unusual) service conditions Subclause 2.2, and all of its subclauses, of IEEE Std C37.100.1-2007 apply.

5. Ratings

5.1 Rating information The list of ratings given in the first paragraph of Clause 4 of IEEE Std C37.100-2007.1 does not apply and is replaced by the following list of ratings. a)

Rated maximum voltage

b)

Rated lightning impulse withstand voltage

c)

Rated power frequency

d)

Rated continuous current

e)

Rated short-time (symmetrical) withstand current and duration

f)

Rated peak withstand current

g)

Rated control voltages (where applicable)

The following switching ratings are optional; they only apply to sectionalizers that are designed for the respective switching ratings. a)

Rated load-switching current

b)

Rated line charging and cable charging current

c)

Rated unloaded transformer switching current

d)

Rated fault-making current

e)

Rated ice breaking capability

NOTE—Ice rating of 1 mm is assumed unless a higher rating is declared by the manufacturer. See 7.110.2.

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IEEE Std C37.63-2013 IEEE Standard for Requirements for Overhead, Pad-Mounted, Dry-Vault, and Submersible Automatic Line Sectionalizers for Alternating Current Systems Up to 38 kV

5.2 Rated maximum voltage (V) NOTE—In IEC standards, rated maximum voltage is denoted by U r . Subclause 4.1, and its subclauses, of IEEE Std C37.100.1-2007 do not apply. The rated maximum voltage indicates the upper limit of the highest voltage of systems for which the switchgear is intended. The preferred values of rated maximum voltage are given in Table 1 and Table 2. Special ratings for series coil sectionalizers are given in Annex B.

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IEEE Std C37.63-2013 IEEE Standard for Requirements for Overhead, Pad-Mounted, Dry-Vault, and Submersible Automatic Line Sectionalizers for Alternating Current Systems Up to 38 kV

Table 1 — Preferred voltage ratings for sectionalizers (except those covered in Table 2) Rated power-frequency Rated power-frequency dry withstand voltage wet withstand voltage (kV) (kV) (See Note 2) (See Note 2)

Line no. (See Note 1)

Rated maximum voltage (kV)

Rated lightning impulse withstand voltage (kV) (See Note 2)

Col. 1 1 2 3 4

Col. 2 15.0 15.5 27.0 38.0

Col. 3 95 110 125 150

Col. 4 36 50 60 70

Col. 5 30 45 50 60

11 12 13 14

12.0 17.5 24.0 36.0

75 95 125 170

28 38 50 70

28 38 50 70

NOTE 1—Lines 11 to 14 refer to distribution systems commonly found outside of North America; the test withstand levels in column 3 and 4 were selected from Table 1a of IEC 62271-1-2007 [B2]. NOTE 2—Cutout type sectionalizers usually have ratings that are associated with the distribution cutout mounting in which they are applied. IEEE Std C37.42 gives preferred values for the distribution cutout fuse support.

Table 2 — Preferred voltage ratings and related test requirements for pad-mounted, dry-vault, and submersible sectionalizers Line no. (See Note 1)

Rated power-frequency Rated powerRated lightning Rated maximum dry withstand voltage frequency wet impulse voltage voltage (kV) (kV) withstand voltage (kV) (See Notes 2) (kV)

DC withstand voltage (kV) (See Note 3)

Col. 1 1 2 3 4

Col. 2 15.5 — 27.0 38.0

Col. 3 95 — 125 150

Col. 4 35 — 40 50

Col. 5 Not required — Not required Not required

Col. 6 53 — 78 103

11 12 13 14

12.0 17.5 24.0 36.0

60 75 95 145

28 38 50 70

Not required Not required Not required Not required

42 57 78 103

NOTE 1— Lines 11 to 14 refer to distribution systems commonly found outside of North America; the test withstand levels in column 3 and 4 were selected from Table 1a of IEC 62271-1-2007. NOTE 2— The rated power-frequency dry withstand voltage for North America (line 1, line 3, and line 4) is reduced, as compared to Table 1, to take into account the reduced withstand capability of some cable components (i.e., elbows, tee connectors). NOTE 3—DC voltage testing of field-aged cables is not a recommended practice. Refer to IEEE Std 400.1 [B3] and IEEE Std 400.2 [B4] for guidelines on testing of dielectric shielded cables. Refer also to IEEE Std 433 [B5] for comparisons of some characteristics of high-voltage testing using 60 Hz ac, dc, and 0.1 Hz methods. The dc withstand test requirement on the sectionalizer demonstrates its capability to withstand either dc or VLF testing of connected cables.

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5.3 Rated insulation level Subclause 4.2 of IEEE Std C37.100.1-2007 does not apply. The preferred values of insulation level voltage are given in Table 1 and Table 2. In these tables, the withstand voltage applies at the standardized reference atmosphere [temperature (20 °C), pressure (101.3 kPa), and humidity (11 g/m3)] specified in IEEE Std 4TM. Insulation withstand capability is affected by altitude. For special service conditions, see 4.2.

5.4 Rated power-frequency (f r ) Subclause 4.3 of IEEE Std C37.100.1-2007 applies.

5.5 Rated continuous (normal) current and temperature rise 5.5.1 Rated continuous (normal) current (I r ) Subclause 4.4.1 of IEEE Std C37.100.1-2007 applies with the following additions. Series coil sectionalizers have special ratings determined by the series coil itself. The continuous current and the load-switching current ratings of series coil sectionalizers are given in Annex B (see Table B.1 and Table B.2). 5.5.2 Temperature rise Subclauses 4.4.2 and 4.4.3 of IEEE Std C37.100.1-2007 apply.

5.6 Rated short-time withstand current (I k ) Subclause 4.5 of IEEE Std C37.100.1-2007 does not apply. Preferred values for the rated short-time withstand currents for series coil sectionalizers are given in Table B.2. Preferred values for the rated short-circuit withstand current of the main circuit of all other sectionalizers are as follows: 1 kA, 1.25 kA, 2 kA, 4 kA, 6 kA, 8 kA, 10 kA, 12.5 kA, 16 kA, or 20 kA.

5.7 Rated peak withstand current (I p ) Subclause 4.6 of IEEE Std C37.100.1-2007 applies with the following modification. The preferred peak withstand current levels for series coil sectionalizers are given in Table B.2.

5.8 Rated duration of short-circuit (t k ) Subclause 4.7 of IEEE Std C37.100.1-2007 does not apply. 7

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The rated short-circuit withstand current duration shall be 1 s. Sectionalizers shall also have a related, required capability for a 10 s short-time withstand current. The preferred 10 s short-circuit withstand current rating is 32.5% of the rated 1 s short-time withstand current rating. NOTE—The 1 s and 10 s short-time withstand current tests provide two points on a damage curve to assist the user in coordinating the device with upstream reclosers and downstream fuses and transformers. Refer to IEEE Std C37.48.1 [B6] for additional information.

5.9 Rated supply voltage of closing and opening devices and of auxiliary and control circuits (U a ) Subclause 4.8, and its subclauses, of IEEE Std C37.100.1-2007 apply.

5.10 Rated supply frequency of closing and opening devices and of auxiliary circuits Subclause 4.9 of IEEE Std C37.100.1-2007 applies.

5.11 Rated pressure of compressed gas supply for insulation and/or operation Subclause 4.10 of IEEE Std C37.100.1-2007 applies.

5.12 Rated filling levels for insulation and/or operation. Subclause 4.11 of IEEE Std C37.100.1-2007 applies.

5.101 Preferred minimum actuating current ratings (series coil sectionalizers) For series coil sectionalizers, the preferred minimum actuating current ratings are given in Annex B.

5.102 Preferred fault-making current rating For sectionalizers designed to have a fault-making rating, the preferred fault-making current is the powerfrequency, 1 s rated short-time withstand current, expressed in symmetrical rms amperes. The sectionalizer shall have the related ability to make and carry an asymmetrical current with a peak current of 2.6 times the symmetrical 1 s rated short-time withstand current, the circuit X/R being approximately 17 at 60 Hz. Only sectionalizers having a closing speed that is independent of operating personnel can have a fault-making current rating. Sectionalizers having a closing speed that is dependent on operating personnel may have a making current capability, which indicates that successful circuit closing is dependent upon proper operation of the device. See 6.10. The fault-making current rating carries the requirement of a design verification test and the rating is assigned to the sectionalizer on its nameplate. A making current capability is an asserted capability of the device by the manufacturer under conditions specified by that manufacturer. A making current capability is not shown on the nameplate. 8

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5.103 Rated load-switching current The rated load-switching current is the maximum rms symmetrical power-frequency load current flowing in a circuit that the sectionalizer shall be required to make and interrupt at its rated maximum voltage.

5.104 Rated unloaded transformer switching current The rated unloaded transformer switching current is the maximum transformer exciting current that the switch shall be required to make and interrupt at its rated maximum voltage. The current is expressed in rms symmetrical amperes. Optionally, the rating may be expressed as the maximum transformer size associated with the exciting current that can be switched. NOTE—The making current may include a transient current several orders of magnitude larger than that of the rated unloaded transformer switching current.

5.105 Preferred line charging and cable charging current ratings The preferred line charging and cable charging interrupting current ratings for sectionalizers having this capability are as given in Table 3. Table 3 — Preferred line charging and cable charging switching current ratings Preferred current (rms amperes)

Rated maximum line voltage (kV) (See Note)

Line charging, overhead

Cable charging

15.0 & 15.5 27.0 38.0

2 5 5

10 25 40

12.0 17.5 24.0 36.0

2 2 5 5

10 10 25 40

NOTE—The first three lines refer to voltages commonly specified in North America. The last four lines refer to distribution systems commonly found outside of North America (see Note 1 of Table 1 and Table 2).

6. Design and construction

6.1 Requirements for liquids in sectionalizers Subclause 5.1, and its subclauses, of IEEE Std C37.100.1-2007 apply with the following addition. When oil is used as an insulating medium, provision shall be made to obtain a bottom oil sample.

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6.2 Requirements for gases in sectionalizers Subclause 5.2 of IEEE Std C37.100.1-2007 applies.

6.3 Grounding provisions Subclause 5.3 of IEEE Std C37.100.1-2007 does not apply. A sectionalizer with a metal housing shall have provisions for the connection of a ground lead. The grounding connector shall accommodate a ground conductor of a size adequate to conduct the rated 1 s shorttime withstand current of the sectionalizer. Pad-mounted, dry-vault, and submersible sectionalizers shall have an additional grounding connection for each three-phase set of cable entrances.

6.4 Auxiliary and control equipment At the present time, there are no requirements defined for this subject.

6.5 Dependent power operation At the present time, there are no requirements defined for this subject.

6.6 Stored energy operation At the present time, there are no requirements defined for this subject.

6.7 Independent manual operation Subclause 5.7 of IEEE Std C37.100.1-2007 applies.

6.8 Operation of releases At the present time, there are no requirements defined for this subject.

6.9 Low- and high-pressure interlocking and monitoring devices Subclause 5.9 of IEEE Std C37.100.1-2007 applies.

6.10 Nameplate markings Subclause 5.10 of IEEE Std C37.100.1-2007 applies with the following additions. 10

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The nameplates for sectionalizers shall be marked in accordance with Table 4. Series coil sectionalizers shall be provided with a separate nameplate that can be changed when the coil is changed and is permanently marked with the following information: a)

Rated continuous current.

b)

Rated short-circuit withstand current(s) and duration(s). The 1 s short-time withstand current value shall be shown. If the 10 s short-time current value, as specified in 5.5 is less than 32.5% of the 1 s value, then it too shall be listed on the nameplate.

c)

Rated minimum actuating current.

Nameplates shall be securely fixed in position and visible from the normal operating position. Table 4 — Nameplate marking Abbreviation (see Note 1)

Unit

Condition: marking only required if

Marking requirement

(2)

(3)

(4)

(5)

Manufacturer’s name

–

–

Manufacturer’s model or type designation

–

–

V or Ur

kV

X

Rated lightning impulse withstand voltage

Up

kV

X

Rated power-frequency

fr

Hz

Rated continuous current

Ir

A

(1)

Rated maximum voltage

X X

If not rated for both 50 Hz and 60 Hz

Y X

Rated for load switching

Rated load-switching current

–

A

Rated short-time withstand current

Ik

kA

Rated fault-making current

Ima

kA

Rated ice breaking capability

–

mm

Type and quantity (volume of liquid or mass of gas) of insulating material

–

l (gal) or kg (lb) (Note 2)

Contains fluid or gas

Y

Mass (including oil for oil-filled devices)

–

kg (lb) (Note 2)

Contains oil

Y

Serial number

–

–

X

Year of manufacture

–

–

X

In column (5):

Y X

Rated for fault making Greater than 1 mm and if type testing is required, see 7.110.2

Y Y

X = the marking of these values is mandatory; blanks indicate the value zero. Y = the marking of these values to the conditions in column (4).

NOTE 1—The abbreviation in column (2) may be used instead of the term in column (1). When the term in column (1) is used, the word “rated” is not required. NOTE 2—SI metric units are preferred; alternate units in parentheses ( ) are acceptable alternates.

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6.11 Interlocking devices Subclause 5.11 of IEEE Std C37.100.1-2007 applies with the following addition. Interlocking devices may be specified for reasons of safety and/or convenience but are not covered by this standard.

6.12 Position/charge indicators 6.12.1 Position indicators Subclause 5.12 of IEEE Std C37.100.1-2007 applies with the following addition. If a position indicator is provided, the preferred colors are red to signify closed and green to signify open. If the words “OPEN” or “CLOSED” are included on the indicator, they should be in contrasting colors. 6.12.2 Stored energy mechanism charge indicator When indicators are used on stored energy operating mechanisms, the following colors are preferred subject to any local codes or indicator requirements: a)

Yellow background with the word “charged” in black letters for charged mechanism

b)

White background with the word “discharged” in black letters for discharged mechanism

As an alternative, red letters on a white background for both indicators may be used.

6.13 X-ray emission Subclause 5.19 of IEEE Std C37.100.1-2007 applies.

6.101 Counters If an operations counter is provided, it shall indicate the total number of tripping operations of the sectionalizer. The counter shall be visible from the normal operating position.

6.102 Instruction Instruction manuals for sectionalizers shall be supplied with the equipment. These may include directions for inspection, storage, unpacking, assembling, and testing the sectionalizer. Additional information may be contained in maintenance manuals and spare parts lists, which may be available from the manufacturer. Operating instructions shall include sufficient information to avoid potentially hazardous conditions if a sectionalizer is not rated for fault closing or load switching.

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6.103 Conductor terminal For connection of bare conductors, bushing terminals shall accommodate conductors of a size adequate to conduct the rated continuous current of the sectionalizer without exceeding the appropriate temperature rise given in 5.5.2. For submersible sectionalizers, bushings shall accommodate cable terminations in accordance with IEEE Std 386TM or IEC 60502, unless specified by the user.

6.104 Tank construction 6.104.1 Tank construction—submersible and pad-mounted sectionalizers Tanks, cabinets, and all appurtenances shall be made of corrosion-resistant material or provided with an impact and corrosion-resistant finish. Equipment shall be suitable for storage in uncovered areas. No external portion of the equipment shall trap water. Lifting lugs shall be provided and positioned so that the equipment will remain level when lifted. The lugs shall be designed and located to avoid interference between lifting slings and any attachments, such as bushings and operating handles, and to avoid scratching or marring the finish during handling. 6.104.2 Tank construction—pad-mounted sectionalizers Pad-mounted enclosures shall meet the requirements of IEEE C57.12.28. Pad-mounted equipment shall be constructed so that it can be lifted into place on the pad without disturbing the entrance cables. Lifting provisions used on pad-mounted equipment shall be designed to not protrude above the top of the cabinet and shall be recessed so that no part of the lifting provision protrudes past the vertical plane. Any lifting provision not meeting the requirement listed above shall be removable after installation and reusable, should the equipment need to be moved, repositioned, or replaced. All cable terminating compartment access doors shall have padlocking provisions. Unless otherwise specified, these access doors shall also have pentahead bolt securing features as shown in IEEE C57.12.28. Compartment doors shall have a positive means of latching in the open position and to the extent practical should be large enough to facilitate working in the equipment. Pad-mounted equipment enclosure coating systems shall meet the requirements of IEEE C57.12.28. 6.104.3 Tank construction—submersible sectionalizers Submersible equipment shall meet the requirements of ANSI C57.12.32.

6.105 Manual operating provision Sectionalizers shall be provided with a manual operating means to both open and close the sectionalizer. If a fault-making rating is assigned, the manual closing shall be independent operation, that is, independent of operating personnel. If a fault-making rating is not assigned, the manual closing may be dependent operation. See 5.102. 13

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Manual control is defined as control in which the main devices under control, whether manually or power operated, are controlled by an attendant. (Refer to IEEE Std C37.100.)

7. Design (type) tests

7.1 General conditions for tests Subclause 6.1 of IEEE Std C37.100.1-2007 does not apply. The design (type) tests are for the purpose of proving the characteristics of the sectionalizer, its operating device, and auxiliary equipment. 7.1.1 Grouping of tests Subclause 6.1 of IEEE Std C37.100.1-2007 does not apply. 7.1.2 Information for identification of specimens Subclause 6.1.1 of IEEE Std C37.100.1-2007 does not apply. When a manufacturer is requesting a certification or type test report, the manufacturer must submit to the testing laboratory drawings and other data containing sufficient information to unambiguously identify by type the essential details and parts of the automatic line sectionalizer presented for test. The definition of an automatic line sectionalizer includes its automatic control. The manufacturer shall include in the information provided to the testing laboratory sufficient information to identify the control used in the design tests. Where appropriate, this information shall include model number, serial number, firmware revision, software revision, and other appropriate control software information. The definition of a cutout type sectionalizer includes a fuse type support. This support is integral to the dielectric capability of the device. The manufacturer shall include in the information provided to the testing laboratory sufficient information to identify the mounting or support used in the design tests. Where appropriate, this information shall include make, model number, and rating. 7.1.3 Information to be included in design-test (type-test) reports Subclause 6.1.2 of IEEE Std C37.100.1-2007 does not apply. The results of all design (type-tests) shall be recorded in design-test (type-test) reports containing sufficient data to prove compliance with the ratings and the test clauses of the relevant standards and sufficient information shall be included so that the essential parts of the automatic line sectionalizer can be identified. The definition of an automatic line sectionalizer includes its automatic control. The control shall be considered an essential part of the automatic line sectionalizer in the test report, including its model number, serial number, firmware revision, software revision, and other appropriate control schemes. The definition of a cutout type sectionalizer includes a fuse type support. This mounting or support shall be considered an essential part of the cutout type sectionalizer and noted in the test report including its make, model number, and rating. 14

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A cutout mounted sectionalizer may require the temporary attachment of an auxiliary device to perform the switching functions of a sectionalizer if such ratings are assigned. If such a device is required, it shall be considered an essential part of the switchgear and noted in the test report including its make, model number, and rating. 7.1.101 Test requirements Tests to verify the ratings and performance requirements of all sectionalizer shall be in accordance with Table 5. 7.1.102 Condition of device to be tested The sectionalizer shall be new and in good condition, and tests shall be applied before the device is put into commercial use. A resistance check shall be performed on the sectionalizer prior to any current or mechanical test, see 7.4. For cutout mounted sectionalizers, the resistance check shall be measured between the top and bottom conductor connectors of the cutout device. 7.1.103 Mounting of device The sectionalizer shall be mounted in a manner closely approximating the normal service conditions for which it is designed. Sectionalizers intended for pole or frame mounting may be mounted at any convenient height above ground. If the sectionalizer normally requires control apparatus, the control apparatus shall be connected during the tests observing the following minimum requirements: a)

The control shall be mounted on the sectionalizer as intended by the manufacturer’s design or positioned within 2 m of sectionalizer phase terminals under test, and

b)

The sectionalizer shall be connected to the control apparatus with the manufacturer’s approved cable whose length shall be the maximum allowed by the manufacturer except that it need not exceed 6 m.

If the control apparatus is intended by the manufacturer to always be integrally mounted to, or within, the sectionalizer structure, it shall be considered in compliance with a) and b) above with a zero length control cable.

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Table 5 —Test requirements for sectionalizers

a

Subclause no.

Type of test

Summary of test (see appropriate test specifications for details of each test)

7.1

General

General conditions for test

7.2

Dielectric

Insulation (dielectric) test

7.4

Resistance

Measurement of the resistance of circuits

7.5

Temperature rise

Temperature rise test

7.6

Short-time and peak withstand

Short-time withstand current and peak withstand current tests

7.8

Tightness

Tightness test

No tests required for air-filled devices at zero gauge pressure

7.11

X-radiation

X-radiation procedure for vacuum interrupters

For all devices using vacuum interrupters

7.101

Switching

Switching tests

Required only if a switching rating is assigned a

7.102

Fault making

Fault-making current tests

Required only if fault-making rating is assigned, see 7.102.1

7.104

Mechanical

Mechanical duty and cold temperature tests

7.105

Partial discharge

Partial discharge tests

Required only if the device uses a non-restoring dielectric as the primary insulation

7.106

Operating duty

Operating duty tests

See Table 8

7.107

Surge current

Surge current test—series coil sectionalizers

Required only for series coil sectionalizers

7.108

Control elements surge withstand

Control elements surge withstand capability tests

Not required for devices where the control elements are fully isolated from ground (earth)

7.109

Minimum actuating

Minimum actuating current tests

Exceptions or conditions

Switching ratings include any of the ratings in 5.1 h), i), j).

7.1.104 Grounding of device All parts of the sectionalizer, and control apparatus where used, that are normally grounded shall be grounded by a lead attached to the ground terminal in a manner not to decrease the withstand voltage. 7.1.105 Power frequency The frequency of the power supply voltage shall be the rated value ± 5%, except that tests at either 50 Hz or 60 Hz may be used to qualify for both rated power frequencies. 7.1.106 Control voltage The sectionalizer shall perform satisfactorily over the full range of control voltages specified in 5.9. This requirement shall be met by performing the standard operating duty as specified in 7.106.3. This requirement does 16

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not apply to tests that do not include open or close operating duties, for example, dielectric withstand and continuous current tests.

7.2 Insulation (dielectric) tests Subclause 6.2 of IEEE Std C37.100.1-2007 applies with the following additions. The tests shall be performed with the test voltages given in Table 1 or Table 2 using the line number specified by the manufacturer. Rated insulation levels for cutout mounted sectionalizers are based in part on the rating of the fuse support or base identified by the manufacturer in 7.1.2 and 7.1.3. Automatic line sectionalizer shall be capable of withstanding, without damage to the automatic line sectionalizer and associated control apparatus, if any, the test voltages of 7.2 when tested in accordance with 7.1. Insulation tests of automatic line sectionalizers shall be performed only when the automatic line sectionalizer is completely isolated from all system voltages. 7.2.1 Ambient air conditions during tests Subclause 6.2.1 of IEEE Std C37.100.1-2007 applies. 7.2.2 Wet test procedure Subclause 6.2.2 of IEEE Std C37.100.1-2007 applies with the additions given in 7.2.6.1 7.2.3 Conditions of sectionalizer during dielectric test Subclause 6.2.3 of IEEE Std C37.100.1-2007 applies with the following additions. a)

On overhead sectionalizer, electrical connections shall be made by means of bare wire, inserted in each terminal. These bare wires shall project in such a manner as not to decrease the withstand value. Any necessary bends may be made at the terminals. The test lead connections shall be made to the wires projecting from the terminals. Terminals shall be representative of those used in service.

b)

On pad-mounted, submersible, and dry-vault sectionalizers connections shall be made through a cable termination similar to that for which the sectionalizers was designed. If terminations capable of meeting the specified dielectric voltage are not available, other terminations (bushing or connectors, or both) may be substituted for the purpose of performing these tests. Breakdown of the termination interface used for the test connections does not constitute a failure of the entity. The termination interface may be replaced and testing continued.

7.2.4 Criteria to pass the test Subclause 6.2.4 of IEEE Std C37.100.1-2007 applies with the following addition. Refer also to IEEE Std C37.100.1-2007, subclause 6.2.6.2 for vacuum interrupter based sectionalizers. 7.2.5 Application of the test voltage and test conditions Subclause 6.2.5 of IEEE Std C37.100.1-2007 applies. 17

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7.2.5.1 General case Subclause 6.2.5.1 of IEEE Std C37.100.1-2007 applies with the following addition. Single-phase sectionalizers shall be tested for conditions 1, 4, and 7 of Table 9 of IEEE Std C37.100.1-2007. The connections of the terminals for phases B and C are not applicable. 7.2.5.2 Special case There are no special cases included in this standard. 7.2.6 Tests of switchgear Subclause 6.2.6 of IEEE Std C37.100.1-2007 does not apply. The tests shall be performed with the test voltages given in Table 1 or Table 2. 7.2.6.1 Power-frequency withstand test voltage Subclause 6.2.6.1 of IEEE Std C37.100.1-2007 applies with the following addition. a)

Wet tests shall not apply to sectionalizers within weather-resistant enclosures or those utilizing submersible cables or terminations.

b)

IEEE values of rated maximum voltage, column 2 of Table 1 and Table 2 given in lines 1 through 4: Power-frequency withstand test voltages shall be applied in accordance with IEEE Std 4, with a peak value equal to 1.414 times the rated power-frequency withstand dry and wet test values given in columns 4 and 5 of Table 1 and Table 2. The test duration shall be 60 s for the dry test. The preferred method for wet tests shall be the “conventional procedure-practice in the US” of IEEE Std 4 with a test duration of 10 s. The “standard test procedure” of IEEE Std 4 is allowed as an alternate. NOTE—Future designs should standardize the wet test procedure by adopting the “standard test procedure” as defined in IEEE Std 4.

c)

IEC values of rated maximum voltage, column 2 of Table 1 and Table 2 given in lines 11 through 14: Power-frequency withstand test voltages shall be applied in accordance with IEEE Std 4, with a peak value equal to 1.414 times the rated power-frequency withstand dry and wet test values given in columns 4 and 5 of Table 1 and Table 2. The test duration shall be 60 s for the dry test. For the IEC values of rated maximum voltage, the wet test method of test shall be the “standard test procedure” of IEEE Std 4 with a test duration of 60 s. WARNING

When performing tests involving open contacts in vacuum, adequate precautions such as shielding or distance should be used to protect test personnel against the possibility of X-radiation occurrences due, for example, to incorrect contact spacing or the application of voltages in excess of those specified. For appropriate shielding, distances, and exposure limits, refer to ANSI C37.85.

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IEEE Std C37.63-2013 IEEE Standard for Requirements for Overhead, Pad-Mounted, Dry-Vault, and Submersible Automatic Line Sectionalizers for Alternating Current Systems Up to 38 kV

7.2.6.2 Lightning impulse withstand test voltage Subclause 6.2.6.2 of IEEE Std C37.100.1-2007 applies with the following addition. The voltage levels shall be equal to or greater than those that are specified. 7.2.6.101 DC withstand test voltage 7.2.6.101.1 Application A dc withstand voltage test is required on sectionalizers using pad-mounted, dry-vault, and submersible cable connectors. This test is in addition to the power-frequency withstand test in 6.2.6.1 of IEEE Std C37.100.1-2007. NOTE—A dc withstand voltage test is required as the design test on the sectionalizer. It is included to verify that the switchgear can withstand the same dc or very low frequency test voltages applied in the field to cables where the cables may still be connected to the switchgear.

7.2.6.101.2 Test procedure The test voltage applied shall be the value given in column 6 of Table 2. The test duration shall be 15 minutes. The dc power source for the dc withstand test shall be capable of supplying a minimum of 10 mA before tripping out on overload. The test shall be considered to have failed if there is: a)

A leakage current of more than 10 mA, or

b)

The test device is unable to withstand the voltage.

The test shall be considered to have passed if the test device withstands the test voltage with a leakage current that does not exceed 10 mA. Non-sustained disruptive discharges (NSDD) may occur and are allowed. NOTE—These test criteria recognize the likelihood that a small leakage current may pass through an insulating medium or across an insulating surface while still supporting the high dc voltage. This is particularly true of vacuum interrupters.

7.3 Radio influence voltage tests (RIV) RIV testing is not required by this standard.

7.4 Measurement of the resistance of circuits Subclause 6.4 of IEEE Std C37.100.1-2007 applies.

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7.5 Temperature rise test 7.5.1 Condition of the sectionalizer to be tested Subclause 6.5.1 of IEEE Std C37.100.1-2007 applies. 7.5.2 Arrangement of the equipment Subclause 6.5.2 of IEEE Std C37.100.1-2007 applies with the following addition. The following arrangement shall be allowed as an alternate to the arrangement of equipment specified in subclause 6.5.2 of IEEE Std C37.100.1-2007 in which case the 5 K difference of temperature rise between the terminals and the external connections shall not apply. The sectionalizer shall have a conductor connected to each terminal having a minimum length of 1.2 m. For sectionalizers with bushings designed for connection to bare copper conductors, use cables no larger than listed in Table 6. For aluminum cables use Table 7. For sectionalizers designed for use with submersible or insulated cables, the cables shall be chosen for the rated current and voltage of the sectionalizer. Refer to IEEE Std 386 for guidance. The connection shall be made to the ends of these conductors. Table 6 —Size of bare copper leads a Rated continuous (normal) current (A)

AWG

(kcmil)

mm2

Up to 50

#6 solid

26.2

14

70 to 100

#2/0 stranded

133

61

140 to 200

--

211

81

250 to 315

--

400

200

400

--

500

250

500

--

600

300

630

800

400

800

1 000

500

Size of leads

a Multiple (parallel) conductors of equivalent net cross section shall be permitted.

Table 7 —Size of bare aluminum leads a Rated continuous (normal) current (A)

Size of leads AWG

kcmil

mm2

200

#4/0 stranded

211

81

500

--

1 000

500

630

--

1 250

625

a Multiple (parallel) conductors of equivalent net cross section shall be permitted.

20

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7.5.3 Measurement of the temperature and temperature rise Subclause 6.5.3 of IEEE Std C37.100.1-2007 applies. 7.5.4 Ambient air temperature Subclause 6.5.4 of IEEE Std C37.100.1-2007 applies. 7.5.5 Temperature rise testing of the auxiliary and control equipment Subclause 6.5.5 of IEEE Std C37.100.1-2007 does not apply. 7.5.6 Interpretation of the temperature rise tests Subclause 6.5.6 of IEEE Std C37.100.1-2007 applies.

7.6 Short-time withstand current and peak withstand current tests 7.6.1 General Main circuits and, where applicable, the grounding circuits of the switchgear shall be subjected to tests to prove their ability to carry the rated peak withstand current and the rated short-time withstand current. The tests shall be made at the rated frequency with a tolerance of ±10% at any suitable voltage and starting at any convenient ambient temperature. If a family of sectionalizer ratings utilize the same design and components for the main current-carrying circuit, the tests shall be made on the smallest and largest short-time withstand current rating assigned to the family. NOTE—Some sectionalizer designs achieve different current ratings by a change in the sensing and control elements alone.

7.6.2 Arrangement of the sectionalizer and of the test circuit Subclause 6.6.1 of IEEE Std C37.100.1-2007 applies. 7.6.3 Test currents and durations Subclause 6.6.2 of IEEE Std C37.100.1-2007 applies with the following modifications. Sectionalizers shall carry the rated short-time currents as given in 5.6 and 5.8 or in Table B.2. The test is required for only one counting operation at each test duration given in 5.8. 7.6.4 Behavior of switchgear during test Subclause 6.6.3 of IEEE Std C37.100.1-2007 applies.

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7.6.5 Conditions of switchgear after test After the test, the switchgear shall not show significant deterioration, shall be capable of operating normally, carrying its rated normal current continuously without exceeding the temperature rise limits specified in Table 3 of C37.100.1, and withstanding 80% of the rated dry power frequency withstand voltage specified under dielectric tests. If the mechanical switching device has a rated making and/or breaking capacity, then the condition of the contacts shall not be such as to affect the performance materially at any making and/or breaking current up to its rated value. The following is sufficient to check these requirements: a)

A no-load operation of the mechanical switching device shall be performed immediately after the test, and the contacts shall open at the first attempt.

b)

The resistance of the main circuit shall be measured according to 6.4.1 of C37.100.1. If the resistance has increased by more than 200%, and if it is not possible to confirm the condition of the contacts by visual inspection, it may be appropriate to perform an additional temperature rise test.

7.7 Verification of the degrees of protection provided by enclosures This standard does not cover specifications for degrees of protection provided by enclosures.

7.8 Tightness tests Subclause 6.8 of IEEE Std C37.100.1-2007 applies.

7.9 Electromagnetic compatibility tests Subclause 6.9 of IEEE Std C37.100.1-2007 does not apply. See control elements surge withstand capability tests in 7.108.

7.10 Additional tests on auxiliary and control circuits This standard does not cover any additional specifications for tests on auxiliary and control circuits.

7.11 X-radiation test procedure for vacuum interrupters Subclause 6.11 of IEEE Std C37.100.1-2007 applies.

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7.101 Switching tests Switching tests are performed to determine the adequacy of the design of a particular type, style, or model of switch or its component parts to meet its assigned switching abilities. Switching ratings are optional ratings for sectionalizers covered by this standard; see Clause 5. 7.101.1 General conditions for switching tests Subclause 8.3.1 of IEEE Std 1247-2005 applies with the following exceptions and modifications. a)

Subclause 8.3.1.3 of IEEE Std 1247-2005 does not apply.

b)

Single-phase testing is not permitted for three-phase sectionalizers.

c)

Subclause 8.3.1.8 of IEEE Std 1247-2005 applies with the following modifications.

d)

1)

Load-switching tests are performed as part of the operating duty tests for load-interrupting sectionalizers, see 7.106.

2)

Loop-switching and 5% load-switching tests in Table 5 of IEEE Std 1247-2005 are not required.

Unit testing as described in 8.3.1.9 of IEEE Std 1247-2005, is not permitted.

7.101.2 Test duties 7.101.2.1 Load-switching tests Subclause 8.3.2.1 of IEEE Std 1247-2005 applies with the following modifications. Load switching is not a required rating. Sectionalizers that are rated for load-switching operation shall have loadswitching tests performed as part of the operating duty tests specified in 7.106. 7.101.2.2 Cable-charging switching tests Subclause 8.3.2.3 of IEEE Std 1247-2005 applies with the following modifications. Cable-charging switching is not a required rating. Sectionalizers that are rated for operation on grounded wye cable circuits shall be capable of interrupting the charging current of unloaded lengths of single-phase shielded cable. The purpose of this test is to demonstrate the capability of interrupting the capacitive switching current rating of the sectionalizer. Cable charging switching tests, if required, apply only for shielded cables (C1 = C0 in Figure 7 of IEEE Std 12472005). 7.101.2.3 Unloaded transformer switching tests Subclause 8.3.2.5 of IEEE Std 1247-2005 applies with the following modifications. Unloaded transformer switching is not a required rating. Sectionalizers that are rated for unloaded transformer switching operation shall be tested with a current between 3% and 4% of continuous current rating of the sectionalizer. 23

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7.102 Fault-making tests 7.102.1 General The fault-making current verification test is required on sectionalizers that have been assigned a fault-making current rating. Sectionalizers that rely on dependent manual operation shall not be assigned a fault-making current rating; see 5.102. 7.102.2 Test requirement The test to prove the capability to meet the rated fault-making current as given in 5.6 and 5.102 shall be the requirements in Table 8, duty 4. The sectionalizer shall pass a test with a peak current of 2.6 times the symmetrical 1 second rated short-time withstand current, the circuit X/R being approximately 17 at 60 Hz. The duration of the current flow shall be no less than 10 cycles. As stated in 7.106.1 and 7.106.3d), repeated tests may be required to achieve the required peak current as it is not always possible to reach the peak current value due to pre-arcing (see subclause 8.5 of IEEE Std 1247-2005). Determine the magnitude of current in accordance with Clause 7 of IEEE Std C37.09-1999.

7.103 Condition of the sectionalizer after switching tests, short-time withstand current tests, and fault-making current tests During and following the specified tests, the condition of the sectionalizer shall be as follows: a)

Maintenance: During the test, the switch shall have functioned without failure and without maintenance or replacement of parts.

b)

Mechanical:

c)

1)

After performing the specified test duties, the mechanical function and the insulators of the used switch shall be practically in the same condition as before the tests. Visual inspection of the used switch after tests is usually sufficient for checking this requirement. The arcing contacts or any other specified renewable parts may be worn. The quality of the oil, used for arc extinction in oil switches, may be impaired and its quantity reduced from the normal level. There may be deposits on insulators caused by the decomposition of the arc extinguishing medium.

2)

The switch shall be capable of operating normally. Visual inspection and no-load operation of the used switch after tests are usually sufficient for checking this requirement.

Electrical: 1)

The switch shall be capable of carrying its rated continuous current without experiencing a thermal run-away but not necessarily without exceeding rated temperature rise in the closed position. A contact resistance check shall be made in accordance with 7.4 to determine the switch’s current carrying ability. The value of contact resistance shall be less than 200% of that before the test. If the contact resistance is greater than 200% of that before the test, a continuous current test with no thermal runaway shall be performed. Thermal runaway means that the temperature does not stabilize and continues to increase as a trend.

2)

The power-frequency dry withstand voltage of the used switch shall not be reduced below 80% of the rated power-frequency dry withstand voltage by deterioration of insulating parts. A rated powerfrequency dry withstand voltage test shall be performed at 80% of the rated power frequency dry withstand voltage to evaluate the insulating ability.

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d)

Unless the switching tests, short-time withstand current tests, and fault-making current tests have consumed the life of the sectionalizer, as defined by the switch manufacturer, the sectionalizer shall be capable of performing its rated switching duties. A suitable interrupting test shall be performed.

7.104 Mechanical operation tests The sectionalizer shall meet the conditions of environment and mechanical duty when tested in accordance with 7.1 and the following subclauses. The sectionalizer shall meet the requirements of the environmental and mechanical duties when the conditions of 7.1 are met and it is tested in accordance with the following subclauses. 7.104.1 Mechanical duty test The sectionalizer shall be subjected to 500 automatic lockout operations without maintenance. The interval between operations shall be the shortest allowed by the rest time of the counting mechanism. The condition of the sectionalizer after the mechanical duty test shall be in accordance with 7.104.3. 7.104.2 Cold temperature test A sectionalizer shall be tested for proper operation and reset at the lowest temperature for which it is designed. After the sectionalizer has come to a steady temperature, it shall be operated with the control set for 1, 2, and 3 shots to lockout. Heater performance shall be verified during this test. The condition of the sectionalizer after the cold temperature test shall be in accordance with 7.104.3. 7.104.3 Condition of the sectionalizer after mechanical and cold temperature tests During and after the tests, the sectionalizer shall be in such a condition that it is capable of operating normally, carrying its rated normal current, and withstanding the voltage as defined below. In general, these requirements are fulfilled if 

During the tests, the sectionalizer operates on command and does not operate without command;



During and after the tests, any distortion of mechanical parts is not such that it adversely affects the operation of the sectionalizer or prevents the proper fitting of any replacement part;



The sectionalizer shall be capable of automatic and manual operation according to its design.

The following items shall be verified: a)

Resistance value according to 7.4 tshall not have increased by more than 50 % or 100 µΩ, whichever is greater;

b)

The sectionalizer shall be capable of passing a power-frequency withstand test. The withstand test voltage shall be 80 % of the values shown in column 4 of Table 1 and Table 2.

For devices that have both interrupting and non-interrupting gaps, each gap shall be tested in its respective open position. Gaps that may be open continuously must withstand 80% of the values shown in column 4 of Table 1 and Table 2. Gaps that may be exposed to voltage stresses for short durations significantly less than one minute 25 Copyright © 2013 IEEE. All rights reserved.

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shall be capable of withstanding a voltage to be stated by the manufacturer but not less than the rated maximum voltage of the device.

7.105 Partial discharge tests 7.105.1 General Partial discharge tests shall be performed on all sectionalizers that use a non–self-restoring dielectric as the primary insulation (e.g., solid dielectric). For purposes of this clause, primary insulation shall be considered to be the predominant insulation between phases and/or to ground (e.g., solid dielectric). These tests shall be performed in accordance with IEEE Std C37.301. The minimum detection sensitivity for which these tests are conducted shall be 10 pC. 7.105.2 Test voltages and limits The measuring voltage shall be as specified in 7.105.3. Sectionalizers having two or more voltage ratings shall be measured on the basis of the highest voltage rating given on the nameplate. Partial discharge limits are not defined for the general case. Partial discharge limits for the equipment under test shall be declared by the manufacturer and serve as the guaranteed limit for the routine tests of all units of a similar design. The actual test values of the type test shall be equal to or less than the manufacturer’s declared values. NOTE—There is general agreement that partial discharge testing should be performed on all sectionalizers where the primary insulating system may be subject to deterioration due to partial discharge. At a minimum, the data will help to monitor process consistency by the producer and serviceability for the user. The following three reasons have been given for not setting partial discharge test limits at this time: 1) there is not a sufficient body of evidence to establish a cause–effect relationship between partial discharge and performance in distribution switchgear; 2) there is not an agreement as to what the limits should be; and 3) appropriate values will depend on the materials, design, and complexity of the equipment. Partial discharge limits at the test voltage specified in 7.105.3 have been suggested in the 10 pC to 20 pC range for a phase or module tested alone. At the upper end, a partial discharge limit of 100 pC has been recommended for a complete three-phase assembly. The 100 pC value is consistent with the Canadian Standard CAN/CSA C22.2 No 31-10 [B1].

7.105.3 Conditioning of test sample The surface of insulators should be clean and dry. The test object should also be at ambient temperature. Mechanical, thermal, or electrical stressing before the test should be avoided. 7.105.4 Test equipment and procedure The equipment and general method used in making partial discharge measurements tests shall be in accordance with the recommendations of IEEE Std C37.301. Tests shall be made with the sectionalizer or test module in the closed and open positions. All surfaces that are normally grounded shall be grounded and all surfaces isolated that are normally isolated. The general test procedure shall be as follows where: Pre-stress voltage

≥ Vpre stress  1.3  1.5 

Vr 3

≥ 1.95 times the rated phase-to-ground voltage 26

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IEEE Std C37.63-2013 IEEE Standard for Requirements for Overhead, Pad-Mounted, Dry-Vault, and Submersible Automatic Line Sectionalizers for Alternating Current Systems Up to 38 kV

Measuring voltage

= V pd = 1.1 rated phase-to-ground voltage

The inception voltage V i is the lowest applied voltage at which the magnitude of a partial discharge (PD) pulse quantity becomes equal to or exceeds 10 pC unless otherwise defined by the manufacturer specific to his equipment. The extinction voltage (Ve) is the highest applied voltage at which the magnitude of a chosen PD pulse quantity becomes equal to, or less than, 10 pC unless otherwise defined by the manufacturer specific to his equipment. a)

Starting at a voltage level less than 60% of V pre-stress , raise the voltage up to or above V pre-stress ; note and record the inception voltage (V i ).

b)

Maintain the voltage at the pre-stress voltage level for 60 s.

c)

Lower the voltage to the measuring voltage (V pd ). Maintain this voltage for 60 s and then note the partial discharge level at the end of this period.

d)

Note and record the extinction voltage (V e ). The extinction voltage may occur at a voltage level above or below the measuring voltage. In any case, the extinction voltage level should be noted and recorded.

NOTE—An open gap in a vacuum interrupter may have field emission from rough spots on the cathode contact during partial discharge tests. This emission is not likely to distort the test results at the voltage level specified above. However, even at this voltage, and especially at higher voltage levels, field emission currents may lead to erroneous conclusions about the presence of partial discharge in solid insulation parallel to the vacuum gap. Since field emission is only observed on a cathode, the observation of asymmetrical results with respect to voltage polarity when a dc voltage is applied is then an indication of the presence of field emission in a vacuum gap instead of a partial discharge in the parallel solid insulation.

7.106 Operating duty tests 7.106.1 General The operating duty shall consist of the applicable tests specified in 7.106.2 made without maintenance, in the order given in Table 8 and on the same test sample. However, if the 90% peak is not obtained on the first attempt of test duty 4, the operating duty sequence may continue on to test duty 5 while a second sample is used to complete the requirements of test duty 4. The test samples shall be of the highest continuous current rating of a design. These tests shall prove conformance with this standard for all lower current ratings of this design. This applies specifically to designs in which the continuous current rating is dependent on a series coil rating and the current path is otherwise the same for all current ratings of the design. 7.106.2 Operating duty tests sectionalizers The complete operating duty for a sectionalizer design shall consist of each of the test duties in columns 5, 6, 7, and 8 of Table 8 that are applicable for the design. The test procedures for each test duty shall be as specified in columns 2, 3, and 4 of Table 8 and the provisions of 7.106.3.

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7.106.3 Particular test provisions for Table 8 a)

Test duty 1 shall consist of five operations each at one- and two-shots to lockout and 10 operations at three-shots to lockout.

b)

Test duty 2 shall consist of the number of operations in column 2 such that 50% of the operations are three-shot to lockout; remaining operations may be divided between one- and two-shot to lockout test duties. Tests shall show that the isolating time from current cessation to sectionalizer contact parting does not exceed 0.25 s. At least five operations shall be performed at both the maximum and the minimum voltages given in 5.9. See 7.106.6

c)

Test duty 3 should provide a sufficient time interval between non-automatic operations to prevent the formation of excessive pressures. The power factor of the test circuit shall be as specified in 8.3.2.1 of IEEE Std 1247-2005. At least five operations shall be performed at both the maximum and the minimum voltages given in 5.9. See 7.106.6.

d)

Test duty 4 shall consist of a sufficient number of non-automatic closing operations to obtain one operation with 90% to 100% asymmetry. For three-phase sectionalizers, this test shall be made on a threephase basis.

e)

Test duty 5 shall have a test circuit with a power factor as specified in 8.3.2.1 of IEEE Std 1247-2005.

7.106.4 Operating performance Sectionalizers shall meet the automatic and non-automatic duties specified without emitting flame or oil. 7.106.5 Condition after standard operating duty tests The condition of the sectionalizer shall be as required in 7.103 with the exception condition 4 does not apply. 7.106.6 Interpretation of standard operating duty tests After the series of operations equivalent to the standard operating duty, it is not to be inferred that the sectionalizer can again meet its rating without being inspected and, if necessary, repaired.

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Table 8 —Standard operating duty—individual test duties

Basic testsa

Additional tests for sectionalizers rated for load breaking

Additional tests for sectionalizers rated for fault making

Additional tests for sectionalizers rated for both load breaking and fault making

Col. 4

Col. 5

Col. 6

Col. 7

Col. 8

Rated maximum (V r )

Rated shorttime withstand (i k )

X

80 automatic lockout

Convenient low voltage

Rated shorttime withstand (i k )

X

3

50 close and open

Rated maximum (V r )

Rated continuous (i r )

--

X

4

1 close

Rated maximum (V r )

Rated momentaryb

--

--

X

X

5

1 open

Rated maximum (V r )

Rated load current switching

--

--

--

X

Test duty

Number and type of operation

Test voltage

Test current

Col. 1

Col. 2

Col. 3

1

20 automatic lockout

2

X

a

Basic tests are required for all sectionalizers. The rated momentary current for series coil sectionalizers is given in Table B.2. For all other sectionalizers, the rated momentary current is equal to the rated short-time withstand current i k . b

7.107 Surge current test—series coil sectionalizers 7.107.1 General A series coil sectionalizer shall be capable of withstanding two current surges of 65 000 A crest having a 5 µs × 10 µs wave shape. 7.107.1.1 Test conditions If a coil bypass device is required, it shall be mounted in the sectionalizer in the same manner as furnished for normal service. The leads from the high-current impulse generator shall be connected to the same terminals of the sectionalizer. 7.107.1.2 Test procedure Two current surges of the specified current value shall be applied. Following this test, the sectionalizer shall be tested at the minimum actuating current for the design so as to cause it to go through one automatic operation to lockout.

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7.107.1.3 Condition after test At the end of the test, the sectionalizer and the coil bypass device shall be in the following condition: a)

Mechanical. Substantially in the same mechanical condition as at the beginning except for minor arc scars on any gap electrodes of the coil bypass device. There shall be no indication of external flashover of the coil bypass device, from the terminals of the coil bypass device to any other parts of the sectionalizer or of the series coil of the sectionalizer.

b)

Electrical. With the coil bypass connected in its normal operating position, the sectionalizer shall be capable of withstanding rated maximum voltage in the open position and, in the closed position, of functioning correctly on overcurrent to go through its counting cycle to lockout at the minimum actuating current for the design.

7.108 Control electronic elements surge withstand capability tests Control electronic elements supplied with sectionalizers shall withstand, without damage, voltage surges originating in the low-voltage energy source, in the current or voltage transformers connected to the control elements, or both, or in the control leads connecting the sectionalizer and the control elements. The surge withstand capability tests shall be performed as given in 6.13 of IEEE Std C37.60-2003.

7.109 Minimum actuating current tests Sectionalizers shall meet the rated minimum actuating current within the specified limits of ±10% when tested as specified in 7.1, 7.109.1, and 7.109.2. The tests shall be made on the smallest and largest actuating current rating or setting of the same design. 7.109.1 Test circuit The sectionalizer shall be connected to a low-voltage power source of alternating current in series with a means for increasing the current and of delivering successive current impulses to cause operation of the counting mechanism. 7.109.2 Test procedure The sectionalizer, set for one-shot lockout, shall be subjected to sufficient current impulses to verify that it does not operate below 90% but does operate at 110% of minimum actuating current.

7.110 Ice loading test NOTE 1—This subclause is adapted from IEC 62271-102. NOTE 2—In this subclause, the abbreviation DUT (device under test) refers to the sectionalizer under test.

7.110.1 Introduction Ice loading tests are design tests performed to determine the rated ice breaking ability of outdoor switching equipment. 30

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IEEE Std C37.63-2013 IEEE Standard for Requirements for Overhead, Pad-Mounted, Dry-Vault, and Submersible Automatic Line Sectionalizers for Alternating Current Systems Up to 38 kV

Three classes of ice coating are specified: 

Class 1 (1 mm ice coating)



Class 10 (10 mm ice coating)



Class 20 (20 mm ice coating)

10 mm and 20 mm ice coatings are considered to be representative of severe ice conditions, A procedure is described for producing clear ice coatings which compare with those encountered in nature so that reproducible tests can be made. For severe ice conditions, a choice is provided between two classes of ice thickness: 10 mm and 20 mm. The procedure for producing controlled coatings of ice (comparable with those encountered in nature) is defined in 7.110.4.5.1. 7.110.2 Applicability The tests defined in 7.110 shall be performed if the manufacturer claims suitability of the sectionalizer for operation under conditions where ice formation may exceed 1 mm. Ice loading tests are only required for sectionalizers that have external moving parts not protected from ice formation that, if frozen in ice, would impair the automatic operation of the device. NOTE—The cutout type sectionalizer is used in a distribution cutout fuse support. Consult the cutout type sectionalizer manufacturer for applications under icing conditions.

7.110.3 Ice formations Ice is produced naturally in two general categories: a)

Clear ice. Clear ice results from rain falling through air with a temperature between 0 °C (+32 °F) and –10 °C (+14 °F)

b)

Rime ice. Rime ice is characterized by a white appearance from the air entrapped during ice formation, forms from rain falling through air with a temperature below –10 °C (+14 °F), or from condensation of atmospheric moisture on cold surfaces

The ice loading test shall be performed with clear ice, which represents the most difficult operating conditions. Since these coatings may form during a period of rain with initial temperatures above freezing, moving parts may be filled with water, which may subsequently freeze. 7.110.4 Test program 7.110.4.1 Test method One of the following test methods is acceptable: a)

Controlled environment test (indoor laboratory test)

b)

Natural environment test (outdoor test)

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IEEE Std C37.63-2013 IEEE Standard for Requirements for Overhead, Pad-Mounted, Dry-Vault, and Submersible Automatic Line Sectionalizers for Alternating Current Systems Up to 38 kV

The type of laboratory must be stated in the test report. Three-pole, group-operated DUTs must be tested as complete three-pole assemblies; however, single-pole operated DUTs may be tested as complete single-pole assemblies. 7.110.4.2 DUT surface condition External surfaces shall be free from all traces of oil or grease, since even a thin film of oil or grease will prevent ice from adhering directly to the surface and will affect the test results. 7.110.4.3 Test arrangement The test for the ice breaking rating shall be performed for both making and breaking operations. The DUT shall be tested with representative operating mechanism components, as required for a typical installation in the field. 7.110.4.4 Ice thickness measurement Test bars, (metal rods or tubes) approximately 3 cm in diameter and 1m in length, shall be mounted at each end of the test specimen—with their longitudinal axes horizontal—and placed to receive the same general wetting as the DUT. The number of test bars shall provide a fair evaluation of the ice thickness over all parts of the DUT, and in no case shall less than one test bar per pole be used. Visual inspection of the ice build-up on the DUT shall be consistent with the test bar measurements. The thickness of the ice shall be determined on the top surface of the test bars by measurement of the depth of saw cuts or drilled holes 15 cm (6 in) from each end of the test bar. The average of the ice thickness shall be equal to or greater than the rated ice breaking ability of the DUT. No measurement shall be less than 83% of this rating. 7.110.4.5 Test conditions 7.110.4.5.1 Controlled environment (indoor laboratory) The DUT shall be completely assembled in a chamber that can be cooled to a temperature of –10 °C (+14 °F). The chamber shall be equipped with sprinklers to provide a fine water spray to the entire assembly with general wetting from above. The water used in the spray shall be cooled to a temperature between 0 °C (32 °F) and 3 °C (37 °F). During a 1 h wetting period, the chamber ambient temperature shall be held between +5 °C (+33 °F) and +3 °C (+37 °F). Following the 1 h spray period, the ambient temperature shall be lowered to the range of – 7 °C (+19 °F) to –3 °C (+27 °F). The spray shall be continued until the rated ice thickness is measured on the top surface of the test bars. The ice coating shall then cure with the chamber ambient temperature in the range of –7 °C (+19 °F) to –3 °C (+27 °F) for a minimum of 4 h after spray is discontinued. The DUT shall be operated following this curing period. 7.110.4.5.2 Natural environment (outdoor) Outdoor tests can be performed when the ambient temperature is between –3 °C (+27 °F) and –15 °C (+5 °F) and the wind velocity is below 25 km/h (15 mph). The completely assembled DUT shall be tested in an area equipped with adequate spray equipment to provide even coverage of the DUT.

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IEEE Std C37.63-2013 IEEE Standard for Requirements for Overhead, Pad-Mounted, Dry-Vault, and Submersible Automatic Line Sectionalizers for Alternating Current Systems Up to 38 kV

With the ambient temperature above freezing, the DUT shall be given a 1 h wetting period, which will coat the surface with a fine spray deposit. The wetting shall precede the spray for ice build-up by not more than 4 h. To obtain uniform coverage, the spray equipment may require adjustment due to wind conditions, or the spray may be interrupted frequently to permit ice formation. The spray procedure shall be continued until the rated ice thickness is measured on the top surface of the test bars. The ice coating shall cure for a minimum of 2 h prior to operation of the DUT. Further temperature decrease during the curing period will not appreciably affect the test results. The operation test must be completed before the temperature rises above –3 °C (+27 °F) and before the radiant heat of the sun changes the characteristics of the ice. 7.110.4.6 Operation procedure DUTs shall be operated by automatic control or by a person using a standard operating device. Chopping on opening (jerking back and forth on the manual operating mechanism) is not permitted on DUTs because these switches are likely to be in a position to carry significant current when closed, and multiple unsuccessful attempts at opening or closing are likely to result in significant current arcs being drawn in air. Automatic power-operated DUTs shall perform successfully on the first power-operated opening or closing attempt. 7.110.4.7 Acceptance criteria The ice test shall be completed when the DUT has been operated through the two separate sequences, a) and b), as follows: a)

From its iced fully-open position to its fully-closed position, (with proper engagement of the contact surfaces and proper engagement of any interrupter)

b)

From its iced fully-closed position to its fully-open and locked out position (with proper operation of any interrupter)

The equipment must sustain no damage that will interfere with normal operation. The order of operating sequences is optional. If so rated, the equipment shall be capable of circuit interruption during successful opening of the DUT. Following the successful closing of an iced DUT, the equipment must be capable of any rated circuit interruption during a subsequent opening operation. During the test, no damage shall be sustained that would impair the current interruption or dielectric withstand capability. A physical examination of linkages, components, and alignments shall be made to assure that proper interruption operation and sequencing has been preserved. Further, following sequence b) above, the device must successfully go through a power frequency wet withstand test to verify that the dielectric withstand performance has not been compromised. If there is doubt about the successful performance of the DUT, a temperature rise test, a short-time withstand current test, or a powerfrequency withstand voltage test, as applicable, shall be conducted to verify acceptable performance.

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IEEE Std C37.63-2013 IEEE Standard for Requirements for Overhead, Pad-Mounted, Dry-Vault, and Submersible Automatic Line Sectionalizers for Alternating Current Systems Up to 38 kV

8. Production tests (routine tests)

8.1 General Clause 7 and its subclauses of IEEE Std C37.100.1-2007 do not apply. The routine (production) tests are for the purpose of revealing faults in material or construction. The routine (production) tests shall be made wherever reasonably practical at the manufacturer’s facility on each apparatus manufactured, to ensure that the product is in accordance with the equipment on which the type tests have been passed. The routine (production) tests given in this standard comprise the following: a)

Dielectric test on the main circuit in accordance with 8.2.

b)

Dielectric test on control and auxiliary circuits in accordance with 8.3.

c)

Measurement of the resistance of the main circuit in accordance with 7.4.

d)

Tightness test in accordance with 8.4.

e)

Operational calibration tests in accordance with 8.101.

f)

Partial discharge tests in accordance with 8.102.

g)

Mechanical tests in accordance with 8.103.

8.2 Dielectric withstand test; one minute dry power-frequency A short-duration power-frequency voltage shall be applied. The test shall be made according to IEEE Std 4 and 7.2, on the complete apparatus or on each separate complete pole, or on each transport unit. Equipment shall be in new, clean, and dry condition. The test voltage shall be that voltage specified in Table 1 or Table 2. The duration of the test may be reduced to 10 s if a voltage of 110% of that specified is used.

8.3 Tests on auxiliary and control circuits Control, secondary wiring, and accessory devices shall be checked to verify that all connections have been made correctly. Devices and relays, if needed, shall be checked by actual operation where feasible. Those circuits for which operation is not feasible shall be checked for continuity.

8.4 Tightness tests For sectionalizers that require the media to be contained within its enclosure to perform as designed, a tightness test must be performed as described in a). For sectionalizers that are required to be submersible, the tightness test must be performed as described in b). a)

Tests shall be performed at normal ambient air temperature with the assembly filled to correspond to the manufacturer’s test practice. Sniffing type test equipment may be used.

b)

A suitable leak test shall be performed on submersible sectionalizers to verify that they will operate under service conditions as outlined in 4.1.2. 34 Copyright © 2013 IEEE. All rights reserved.

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IEEE Std C37.63-2013 IEEE Standard for Requirements for Overhead, Pad-Mounted, Dry-Vault, and Submersible Automatic Line Sectionalizers for Alternating Current Systems Up to 38 kV

8.101 Operational calibration Sectionalizers shall be subjected to the following calibration, where applicable, for conformance to published operating characteristics. Calibration may be performed on the individual control elements sub-assembly prior to final assembly on the sectionalizer. When the latter is done, the complete assembly shall be tested to assure that the device will open the sectionalizer. The calibration may be performed in any order deemed appropriate by the manufacturer. a)

Sequencing tests as appropriate for the type of control or actuation

b)

Actuating current operation

c)

Actuating delay(s), if applicable

d)

Remote features

e)

Special features

8.102 Partial discharge test Partial discharge tests shall be performed on all sectionalizers that use a non self-restoring dielectric as the primary insulation. For purposes of this clause, primary insulation shall be considered to be the predominant insulation between phases and/or to ground, (e.g., solid dielectric). Tests shall be performed as specified in 7.105 with the following exceptions: a)

Modular testing of components is permitted in all cases.

b)

Measurement and recording the inception and extinction voltage is not required.

c)

If the test in the open condition covers all solid insulation paths to ground and across phases, only this condition has to be tested.

d)

The manufacturer shall establish the appropriate test limits for each test object.

8.103 Mechanical tests The mechanical operations tests shall include the following: a)

Inspection of the external parts.

b)

Manual tripping by the tripping lever.

c)

Without trouble or malfunction, 25 consecutive operational tests to check performance of mechanism, sequencing, and time devices. Shunt-trip sectionalizers shall have five operations performed at minimum control voltage.

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IEEE Std C37.63-2013 IEEE Standard for Requirements for Overhead, Pad-Mounted, Dry-Vault, and Submersible Automatic Line Sectionalizers for Alternating Current Systems Up to 38 kV

Annex A (informative) X/R ratios

A.1 General A general understanding of circuit time constant () and X/R ratio and associated peak currents is necessary for the proper design, testing, and application of switchgear. The mechanical stresses associated with fault withstand 2 or fault making, are in relation with the square of the peak current ( ipeak ) and the thermal stress associated with

pre-arcing or fault current interruption is a complex relation of the arc voltage, the arcing time and the total charge (integral of the arcing current).

A.2 Time constant  and X/R ratio An electrical circuit may be defined by its main series components that are the inductance (L or X) (X = 2f r L) and resistance. The circuit time constant () is defined by the ratio L/R, = L/R. The ratio X/R is frequency dependent (i.e., a time constant of 45 ms will lead to an X/R ratio of 14 at 50 Hz and 17 at 60 Hz). For a three-phase fault, the positive sequence components of the circuit shall be considered ( = L1/R1, X/R = X1/R1). For a phase to ground fault, the positive and zero sequences components shall be considered as follows:

 

2 L1  L0 2 R1  R0

or

2 X1  X 0 X  R 2 R1  R0

where: R0

is the zero sequence resistance

R1

is the positive sequence resistance

L0

is the zero sequence inductance

X0

is the zero sequence reactance

L1

is the positive sequence inductance

X1

is the positive sequence reactance

A.3 Asymmetrical fault current The maximum asymmetrical current occurs when the fault is initiated at zero voltage. Such a fault may be associated with lightning flashover or with a switch or a breaker closing or reclosing on a faulted circuit or a temporary ground. If a three-phase switching device is used, an asymmetrical fault current will occur in one of the phases, the value of which will be between 87% and 100% of maximum asymmetrical current.

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IEEE Std C37.63-2013 IEEE Standard for Requirements for Overhead, Pad-Mounted, Dry-Vault, and Submersible Automatic Line Sectionalizers for Alternating Current Systems Up to 38 kV

The instantaneous current of a single-phase circuit will be in accordance with Equation (A.1).



i(t )  2 I sint       sin   e t / 



(A.1)

where: i(t)

is the instantaneous current

I

is the rms value of the current



is the angular frequency (2fr), where fr is the rated frequency

θ

is the phase angle = tan-1(X/R)



is the angle between voltage zero and time that fault is initiated

t

is the time



is the circuit time constant (L/R or X/ωR) (see Table A.1).

The maximum asymmetry will occur when the fault is initiated at zero voltage (φ = 0). The peak of the asymmetrical current (ipeak) is the maximum of the Equation (A.1). The peak factor K is ipeak/I. Table A.1 is a tabulation of the peak factors for both 50 Hz and 60 Hz over a range of time constants.

Table A.1—X/R Ratios: peak factors Time constant  (ms)

Peak factor (ip/I)

X/R ratios at 60 Hz

at 50 Hz

at 60 Hz

at 50 Hz

10.6

4.0

3.3

2.09

2.01

21.2

8.0

6.7

2.38

2.31

31.8

12.0

10

2.51

2.46

45

17.0

14.1

2.59

2.55

60

22.6

18.9

2.65

2.61

90

33.9

28.3

2.70

2.68

120

45.3

37.7

2.73

2.72

150

56.6

47.1

2.75

2.74

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IEEE Std C37.63-2013 IEEE Standard for Requirements for Overhead, Pad-Mounted, Dry-Vault, and Submersible Automatic Line Sectionalizers for Alternating Current Systems Up to 38 kV

Annex B (normative) Ratings for series coil sectionalizers Series coil sectionalizers have been used globally for many years. Traditionally, series coil designs operate in a current-sensing mode as opposed to a time-sensing or voltage-sensing mode. The current ratings of series coil sectionalizers are determined by the series coil itself and by the rating of the contacts. The preferred ratings of series coil sectionalizers, as established in earlier revisions of this standard, are given in Table B.1 and Table B.2.

B.1 Rating information The rating of a series coil sectionalizer shall be as given in Table B.1 and Table B.2.

B.2 Series coil sectionalizer ratings The preferred ratings unique to a series coil sectionalizer are given in Table B.1 and Table B.2. Any rating not specifically listed in Table B.1 or Table B.2 shall be taken from the appropriate subclauses of Clause 5 of this standard. Table B.1—Preferred ratings and performance characteristics for series coil automatic line sectionalizers

Line no. Col. 1

Rated maximum voltage (kV)

Rate lightning impulse withstand voltage (kV)

Col. 2

Col. 3

Rated power-frequency withstand voltage (kV)

Currenta (A)

60 s dry

10 s wet

Continuous

Load current switching

Col. 4

Col. 5

Col. 6

Col. 7

Single-phase sectionalizers 1

15.0

95

35

30

140

308

2

15.0

125

42

36

200

200

3

15.0

125

42

36

200

440

4

27.0

125

60

50

200

—

Three-phase sectionalizers

a

5

15.5

110

50

45

200

440

6

27.0

125

60

50

200

440

See Table B.2 for data on current ratings for all continuous current ratings.

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IEEE Std C37.63-2013 IEEE Standard for Requirements for Overhead, Pad-Mounted, Dry-Vault, and Submersible Automatic Line Sectionalizers for Alternating Current Systems Up to 38 kV

Table B.2—Preferred current ratings of series coil automatic line sectionalizers

Continuous current 60 Hz b

Minimum actuating current (A, rms symmetrical)

Col. 1

Momentary and fault making (A, rms, asymmetrical)

1s

Col. 2

Col. 3

Col. 4

5

8

800

10

16

15

10 s

Lines 5 and 6 three-phase sectionalizer a Momentary and fault making (A, rms, asymmetrical)

1s

Col. 5

Col. 6

Col. 7

Col. 8

200

60

800

200

60

1600

400

125

1600

400

125

24

2400

600

190

2400

600

190

25

40

4000

1000

325

4000

1000

325

35

56

6000

1500

450

6000

1500

450

50

80

6500

2000

650

7000

2000

650

70

112

6500

3000

900

8000

3000

900

100

160

6500

4000

1250

8000

4000

1250

140

(A, rms symmetrical)

10 s

(A, rms symmetrical)

224

6500

4000

1800

8000

4000

1800

c

256

—

—

—

9000

5700

2600

185 c

296

—

—

—

9000

5700

2600

c

320

—

—

—

9000

5700

2600

160

200 a

Lines 1, 2, 3, and 4 single-phase sectionalizers a

For line numbers, refer to Table B.1.

b

Current ratings are based on 60 Hz systems; refer to the manufacturer for application at other system frequencies. c

Applicable to three-phase sectionalizers only.

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IEEE Std C37.63-2013 IEEE Standard for Requirements for Overhead, Pad-Mounted, Dry-Vault, and Submersible Automatic Line Sectionalizers for Alternating Current Systems Up to 38 kV

Annex C (informative) Bibliography [B1] CAN/CSA C22.2 No. 31-10, Switchgear assemblies. 7 [B2] IEC 62271-1, High-voltage switchgear and controlgear—Part 1: Common specifications. 8 [B3] IEEE Std 400.1™, IEEE Guide for Field Testing of Laminated Dielectric, Shielded Power Cable Systems Rated 5 kV and Above with High Direct Current Voltage. 9, 10 [B4] IEEE Std 400.2™, IEEE Guide for Field Testing of Shielded Power Cable Systems Using Very Low Frequency (VLF). [B5] IEEE Std 433™, IEEE Recommended Practice for Insulation Testing of AC Electric Machinery with High Voltage at Very Low Frequency. [B6] IEEE Std C37.48.1™, IEEE Guide for the Application, Operation, and Coordination of HighVoltage (>1000 V) Current-Limiting Fuses.

7

CSA publications are available from the Canadian Standards Association (http://www.csa.ca/). IEC publications are available from the International Electrotechnical Commission (http://www.iec.ch/). IEC publications are also available in the United States from the American National Standards Institute (http://www.ansi.org/). 9 The IEEE standards or products referred to in this clause are trademarks of The Institute of Electrical and Electronics Engineers, Inc. 10 This publication is available from The Institute of Electrical and Electronics Engineers (http://standards.ieee.org/). 8

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