Technical FAQs

Ask a Question

What does class S1 and S2 mean for a HV circuit breaker ?

IEC 62271‐100 defines two separate class according to the type of the system.

circuit-breaker class S1
circuit-breaker intended to be used in a cable system
circuit-breaker class S2
circuit-breaker used in a line-system

The type tests and the specifications are different if the circuit breaker is defined S1 or S2 class.
Our HV circuit breakers (LF,SF, Evolis, Easypact EXE) are S1 class

Was this helpful?
What can we do to improve the information ?