Standards Development

Scope

This part of IEC 62310 applies to movable, stationary, fixed, open type or built-in STS for use in low voltage distribution systems and that are intended to be installed in an area accessible by an ordinary person or in a restricted access area as applicable. STS is intended to operate on fixed frequency, single phase or multi-phase system, with rated voltage not exceeding 1 000 V AC. It applies to pluggable and to permanently connected STS, whether consisting of a system of interconnected units or of independent units, subject to installing, operating and maintaining the STS in the manner prescribed by the manufacturer.

This document specifies requirements to ensure safety for the ordinary person who comes into contact with the STS and, where specifically stated, for the skilled person. The objective is to reduce risks of fire, electric shock, thermal, energy and mechanical hazards during use and operation and, where specifically stated, during service and maintenance.

This part of IEC 62310 includes requirements for the switching elements, their control and protective elements, where applicable. This part of IEC 62310 also includes information for the overall integration of the STS and its accessories into the low voltage AC power distribution system.

Components or devices necessary for the operation, control, protection and isolation (e.g. circuit breakers, fuses, transformers, relays, etc.) of an STS should comply with the requirements of the relevant IEC standards and are not covered by this part of IEC 62310.

This document is harmonized with the applicable parts of group safety publication IEC 62477-1:2022 for power electronic converter systems and contains additional requirements relevant to STS.

This document does not apply to:

• devices for DC source switching

• transfer switching equipment (TSE) covered by IEC 60947-6-1

• the automatic switching devices integrated into UPS covered by IEC 62040 series

NOTE For STS intended to be used in vehicles, onboard ships or aircraft, in tropical countries, for emergency power systems (such as those used for health care facilities, fire fighting, emergency rescue, etc.) different requirements may be necessary.