IEC 60947 6-1 pdf download.Low-voltage switchgear and controlgear – Part 6-1: Multiple function equipment – Transfer switching equipment
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. It covers: – manually operated transfer switching equipment (MTSE); – remotely operated transfer switching equipment (RTSE); – automatic transfer switching equipment (ATSE), including the controller. It does not cover: 1 ) TSE configurations that are either not manufacturer tested and/or not marked according to this document as a complete transfer switch; 2) auxiliary contacts (for guidance, see IEC 60947-5-1 ); 3) transfer switches used in explosive atmospheres (for guidance, see IEC 60079 (all parts)); 4) embedded software design (for guidance, see IEC TR 63201 ); 5) cybersecurity aspects (for guidance, see IEC TS 63208); 6) TSE rated for direct-on-line starting asynchronous motor of design NE and HE, according to IEC 60034-1 2:201 6 (for guidance, see AC-3e utilisation category according IEC 60947- 4-1 :201 8); 7) other types of TSE under consideration including closed transition TSE, overlapping neutral TSE, multi-source TSE (i.e. TSE with more than two sources of supply), stand- alone ATS controllers, bypass isolation TSE, TSE with load-shedding functions and bus- tie TSE. NOTE TSE used for safety services and for emergency escape lighting systems as described in IEC 60364-5-56 are subject to specific rules and/or legal requirements. The object of this document is to state: 1 ) the characteristics of the equipment; 2) the conditions of the equipment with respect to: a) operation for which the equipment is intended; b) operation and behaviour in case of specified abnormal conditions, for example, short- circuit; c) dielectric properties; 3) the tests intended to confirm that these conditions have been met and the methods for performing these tests;
3 Terms and definitions
3.1 General For the purposes of this document, the terms and definitions given in Clause 3 of IEC 60947- 1 :2020, and the following apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: • ISO Online browsing platform: available at http://www.iso.org/obp • IEC Electropedia: available at http://www.electropedia.org/ 3.3.2 manually operated transfer switching equipment MTSE transfer switching equipment operated manually and non-electrically 3.3.3 remotely operated transfer switching equipment RTSE transfer switching equipment that is electrically operated and not self-acting Note 1 to entry: RTSE can have a feature for local and/or manual operation. 3.3.4 automatic transfer switching equipment ATSE self-acting transfer switching equipment, including all necessary sensing inputs, monitoring, and control logic for transferring operations Note 1 to entry: ATSE can have a feature for local and/or remote and/or manual operation. 3.3.5 derived transfer switching equipment derived TSE TSE based on switching devices tha ave certain tests required for compliance with IEC 60947-6-1 as defined in Table 9, covered by IEC 60947-3 for Class PC, IEC 60947-2 or IEC 60947-6-2 for Class CB, or IEC 60947-4-1 for Class CC Note 1 to entry: It is not necessary to repeat tests fully covered in the switching devices product standards. 3.3.6 Class PC TSE transfer switch equipment based on mechanical switching devices, that do not need electrical power to hold the main contacts open or closed and capable of making, carrying, and breaking currents under normal circuit conditions including operating overload conditions, and making and withstanding short-circuit currents Note 1 to entry: For the purposes of this document, a fuse-combination unit is considered a Class PC device capable of breaking short-circuit current. Note 2 to entry: Class PC TSE are also capable of withstanding conditional short-circuit currents. 3.3.7 Class CB TSE transfer switch equipment based on mechanical switching devices and capable of making, carrying and breaking currents under normal circuit conditions including operating overload conditions, and making and breaking short-circuit currents
IEC 60947 6-1 pdf download
