dnaSRPS EN IEC 60947-10:2022

Low-voltage switchgear and controlgear - Part 10: Semiconductor circuit-breakers

Scope

This part of IEC 60947 applies to semiconductor circuit-breakers with a rated voltage up to 1 000 V AC or 1 500 V DC, intended to be installed and operated by instructed or skilled persons.

This document covers the following different types:

– semiconductor circuit-breakers (SCCBs) having semiconductor switching elements and, for isolation function, mechanical isolation contacts connected in series;

– semiconductor hybrid circuit-breakers (SCHCBs) having semiconductor switching elements and mechanical switching elements in parallel and in addition, for isolation function, mechanical isolation contacts connected in series.

NOTE 1 Circuit-breakers not incorporating power semiconductors in the main circuit are covered by IEC 60947-2.

In this document, where the term "circuit-breaker" only is used, it applies to both types.

This document applies regardless of the rated currents, the method of construction or the proposed applications of the circuit-breakers.

The object of this document is to state:

a) the characteristics of circuit-breakers;

b) the conditions with which circuit-breakers shall comply with reference to:

1) operation and behaviour in normal service;

2) operation and behaviour under specific abnormal circuit conditions (e.g. overload or short-circuit);

3) dielectric properties;

4) requirements on electromagnetic compatibility;

c) tests intended for confirming that these conditions have been met and the methods to be adopted for these tests;

d) information to be marked on or given with the circuit-breakers.

NOTE 2 For cybersecurity aspects, see IEC 63208.