Low Voltage Breaker Typical Operating Time: Etap Knowledge Base

ETAP Knowledge Base

Low Voltage Breaker Typical Operating Time Description: Typical operating times for low voltage circuit breakers Category:

LV CB, Operating Times

Type:

Information

Keywords:

Typical Operating Times, low voltage circuit breaker

Typical operating times for low voltage circuit breakers are listed in the following table: Table1 of IEEE 1584 2002: Power Circuit Breaker Operating Timesa Circuit Breaker Rating and Type Molded Case (<1000 V) (Integral Trip) Insulated Case (<1000 V) (Integral Trip or relay operated) Power CB (<1000) (Integral Trip or relay operated)

Opening Time at 60 Hz (Cycles) 1.5

Opening time at 50 Hz (Cycles) 1.25

Opening Time in Seconds

3.0

2.5

0.050

3.0

2.5

0.050

0.025

a

All the values listed in this table do not include the external trip times.

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