GB/T 14048.11-2024 Low-voltage switchgear and controlgear - Part 6-1 : Multiple function equipmentTiansfer switching equipment
1 Scope
This document applies to transfer switching equipment (TSE) 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 1000 V AC or 1500 V DC.
It covers:
- manually operated transfer switching equipment (MTSE);
- remotely operated transfer switching equipment (RTSE);
- automatic transfer switching equipment (ATSE).
It does not cover:
a) TSE configurations that are either not manufacturer tested and/or not marked according to this document as a complete transfer switch;
b) auxiliary contacts (see GB/T 14048.5);
c) transfer switches used in explosive atmospheres [(see IEC 60079 (all parts)];
d) embedded software design (see IEC TR 63201);
e) cybersecurity aspects (see IEC TS 63208);
f) TSE (see AC-3e utilisation category according GB/T 14048.4-2020) rated for direct-on-line starting asynchronous motor of design NE and HE (see GB/T 21210-2016);
g) other types of TSE including closed transition TSE, overlapping neutral TSE, TSE with load-shedding functions and bus-tie TSE, the supplementary requirements of these types are under consideration.
The control equipment (such as control switch, etc.) and protection appliances (such as circuit breakers, etc.) necessary for TSE meet the requirements of relevant national standards.
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:
a) the characteristics of the equipment;
b) the conditions of the equipment with respect to:
1) operation for which the equipment is intended;
2) operation and behaviour in case of specified abnormal conditions, for example, short-circuit;
3) dielectric properties;
c) the tests intended to confirm that these conditions have been met and the methods for performing these tests;
d) the product information to be provided by the manufacturer.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 2423.2-2008 Environmental testing for electric and electronic products - Part 2: Test methods - Test B: Dry heat
GB 4824-2019 Industrial, scientific and medical equipment - Radio-frequency disturbance characteristics - Limits and methods of measurement
GB/T 14048 (all parts) Low-voltage switchgear and controlgear
GB/T 14048.1-2023 Low-voltage switchgear and controlgear - Part 1 : General rules (IEC 60947-1:2020, MOD)
GB/T 14048.2-2020 Low-voltage switchgear and controlgear - Part 2 : Circuit-breakers (IEC 60947-2:2019, MOD)
GB/T 14048.3 Low-voltage switchgear and controlgear - Part 3:Switches, disconnectors, switch-disconnectors and fuse-combination units (GB/T 14048.3-2017, IEC 60947-3:2015, IDT)
GB/T 14048.4-2020 Low-voltage switchgear and controlgear - Part 4-1 : Contactors and motor-starters - Electromechanical contactors and motor-starters (Including motor protector) (IEC 60947-4-1:2018, MOD)
GB/T 14048.9 Low-voltage switchgear and controlgear - Part 6-2 : Multiple function equipment - Control and protective switching devices(or equipment) (CPS) (IEC 60947-6-2:2007, IDT)
GB/T 19334-2021 Dimensions of low-voltage switchgear and controlgear - Standardized mounting on rails for mechanical support of switchgear, controlgear and accessories (IEC 60715:2017, IDT)
IEC 60417 Graphical symbols for use on equipment
Note: GB/T 5465.2-2008 Graphical symbols for use on electrical equipment - Part 2 : Graphical symbols (IEC 60417 DB:2007, IDT)
IEC 60812 Failure modes and effects analysis (FMEA and FMECA)
Note: GB/T 7826-2012 Analysis techniques for system reliability - Procedure for failure mode and effects analysis (FMEA) (IEC 60812:2006, IDT)
IEC 61000-4-13:2002 Electromagnetic compatibility (EMC) - Testing an measurement techniques - Harmonics and interharmonics including mains signalling at a.c.power port, low frequency immunity test
IEC 61000-4-13:2002/AMD1:2009
IEC 61000-4-13:2002/AMD2:2015
Note: GB/T 17626.13-2006 Electromagnetic compatibility (EMC) - Testing and measurement techniques - Harmonics and interharmonics including mains signalling at a.c.power port low frequency immunity test (IEC 61000-4-13:2002, IDT)
3 Terms and definitions, symbol and abbreviations
For the purposes of this document, the terms and definitions established in GB/T 14048.1-2023 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/
3.1 Transfer switching devices
3.1.1
transfer switching equipment; TSE
equipment containing one or more switching devices and associated operating mechanism for disconnecting load circuits from one supply and connecting to another supply
3.1.2
manually operated transfer switching equipment; MTSE
transfer switching equipment operated manually and non-electrically
3.1.3
remotely operated transfer switching equipment; RTSE
transfer switching equipment that is electrically operated and not self-acting
Note: RTSE can have a feature for local and/or manual operation.
3.1.4
automatic transfer switching equipment; ATSE
self-acting transfer switching equipment, including all necessary sensing inputs, monitoring, and control logic for transferring operations
Note: ATSE can have a feature for local and/or remote and/or manual operation.
3.1.5
derived transfer switching equipment; TSE-D
TSE based on switching devices that have certain tests required for compliance with GB/T 14048.11 as defined in Table 9, covered by GB/T 14048.3 for Class PC, GB/T 14048.2 or I GB/T 14048.9 for Class CB, or GB/T 14048.4 for Class CC.
Note: It is not necessary to repeat tests fully covered in the switching devices product standards.
3.1.6
specific transfer switching equipment; TSE-S
integral TSE whose main parts are specially designed for power transfer according to the requirements of this document
3.1.7
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: For the purposes of this document, a fuse-combination unit is considered a Class PC device capable of breaking short-circuit current.
Note 2: Class PC TSE are also capable of withstanding conditional short-circuit currents.
3.1.8
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
Note: Class CB TSE for which the manufacturer has assigned a short-time withstand current are also capable of withstanding short-circuit currents.
3.1.9
Class CC TSE
transfer switch equipment based on mechanical switching devices having only one position of rest, operating otherwise than by hand, and capable of making, carrying and breaking currents under normal circuit conditions including operating overload conditions
Note 1: Class CC TSE are not capable of making or breaking short-circuit currents. They are only capable of withstanding conditional short-circuit currents.
Note 2: Class CC TSE is not suitable for isolation.
3.1.10
ATS controller
device intended for sensing and monitoring the power supply sources, and controlling the automatic transfer sequence
Note: ATS controller can be either integral to the ATSE or stand-alone to be associated with an RTSE.
3.1.11
dedicated wiring accessory
prefabricated connection wiring system specifically intended for identified switchgear or controlgear
Note 1: A dedicated wiring accessory can be integrated in the switchgear or controlgear or delivered separately.
Note 2: A typical dedicated wiring accessory is for example a connection link.
