BS EN IEC 60947-6-1:2026

1 Scope This document applies to transfer switching equipment (TSE), to be used in power systems for ensuring the continuity of the supply and allowing the energy management of the installation, by transferring a load between power supply sources, the rated voltage of which does not exceed 1 000 V AC or 1 500 V DC. Specific requirements for bypass/isolation transfer switch equipment are given in Annex C, ATSE having closed transition capability are given in Annex D, stand-alone ATS controllers are given in Annex E, and TSE for electric driven fire pump controllers are given in Annex F. It covers:

manually operated transfer switching equipment (MTSE);
remotely operated transfer switching equipment (RTSE);
automatic transfer switching equipment (ATSE), including the controller;
stand-alone ATS controllers;
bypass/isolation transfer switch equipment (BTSE);
ATSE having closed transition capability;
fire pump TSE. <...