GB/T 14048.11-2024Low-voltage switchgear and controlgear - Part 6-1: Multiple function equipment - Transfer switching equipment (English PDF)

Foreword

This document was drafted in accordance with the rules given in GB/T 1.1-2020,

Directives for standardization - Part 1.Rules for the structure and drafting of

standardizing documents.

This document is Part 6-1 of GB/T 14048, Low-voltage switchgear and controlgear.

The following parts have been issued under GB/T 14048.

-- Part 1.General rules;

-- Part 2.Circuit-breakers;

-- Part 3.Switches, disconnectors, switch-disconnectors and fuse-combination

units;

-- Part 4-1.Contactors and motor-starters - Electromechanical contactors and

motor-starters (Including motor protector);

-- Part 4-2.Contactors and motor starters - Semiconductor controllers and

starters for AC motors (including soft starters);

-- Part 4-3.Contactors and motor-starters - AC semiconductor controllers and

contactors for non-motor loads;

-- Part 5-1.Control circuit devices and switching element - Electromechanical

control circuit devices;

-- Part 5-2.Control circuit appliances and switching elements - Proximity

switches;

-- Part 5-3.Control circuit devices and switching elements - Requirements for

proximity devices with defined behaviour under fault conditions (PDDB);

-- Part 5-4.Control circuit devices and switching elements - Method of assessing

the performance of low-energy contacts - Special test;

-- Part 5-5.Control circuit devices and switching elements - Electrical

emergency stop device with mechanical latching function;

-- Part 5-6.Control circuit devices and switching elements - DC interface for

proximity sensors and switching amplifiers (NAMUR);

-- Part 5-7.Control circuit devices and switching elements - Requirements for

proximity devices with analogue output;

-- Part 5-8.Control circuit devices and switching elements - Three-position

enabling switches;

-- Part 5-9.Control circuit devices and switching elements - Flow rate switches;

-- Part 6-1.Multiple function equipment - Transfer switching equipment;

-- Part 6-2.Multiple function equipment control and protective switching

devices (or equipment) (CPS);

-- Part 7-1.Ancillary equipment - Terminal blocks for copper conductors;

-- Part 7-2.Ancillary equipment - Protective conductor terminal blocks for

copper conductors;

-- Part 7-3.Ancillary equipment - Safety requirements for fuse terminal blocks;

-- Part 7-4.Ancillary equipment - PCB terminal blocks for copper conductors;

-- Part 7-5.Ancillary equipment - Terminal blocks for aluminium conductors;

-- Part 8.Loaded thermal protection (PTC) control units for rotating electrical

machines;

-- Part 9-1.Active arc-fault mitigation systems - Arc quenching devices;

This document replaces GB/T 14048.11-2016, Low-voltage switchgear and controlgear

- Part 6-1.Multiple function equipment - Transfer switching equipment. Compared with

GB/T 14048.11-2016, except for structural adjustment and editorial changes, the main

technical changes are as follows.

-- Add the provisions for the scope to which this document does not apply (see

Clause 1; Clause 1 of the 2016 edition);

-- Update terms and definitions (see Clause 3; Clause 3 of the 2016 edition);

-- Add multi-source transfer switching equipment (see Clause 4, Annex D);

-- Add bus-tie transfer switching equipment (see Clause 4, Annex E);

-- Add bypass transfer switching equipment (see Clause 4, Annex F);

-- Change the definition of utilization category (see 5.4; 5.4 of the 2016 edition);

-- Change the marking requirements (see 6.2; 6.2 of the 2016 edition);

-- Add requirements for clearances and creepage distances (see 8.1.6);

-- Add requirements and tests for mechanical and electrical interlock (see 8.2.1.2,

9.2.3.2);

-- Add requirements for operating sequences (see 6.3);

-- Change the requirements for rated short-time withstand current (see 5.3.6.2,

8.2.5.1, 9.2.5.2; 5.3.6.1, 8.2.5.1, 9.3.4.3 of the 2016 edition);

-- Change the requirements for electromagnetic compatibility (see 8.3, 9.2.8; 8.3,

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.

2 Normative references

The following documents are referred to in the text in such a way that some or all of

their content constitutes requirements of this document. For dated references, only the

edition cited applies. For undated references, the latest edition of the referenced

document (including any amendments) applies.

GB/T 2423.2-2008, Environmental testing for electric and electronic products -

Part 2.Test methods - Tests B. Dry heat (IEC 60068-2-2.2007, IDT)

GB 4824-2019, Industrial, scientific and medical equipment - Radio-frequency

disturbance characteristics - Limits and methods of measurement (CISPR 11.2016,

IDT)

3 Terms, definitions, symbols and abbreviated terms

For the purposes of this document, the terms and definitions given in GB/T 14048.1-

2023, and the following apply.

ISO and IEC maintain terminological databases for use in standardization at the

following addresses.

4 Classification

Transfer switching equipment is classified according to.

5 Characteristics

The rated operational current of TSE is stated by the manufacturer according to

subclause 5.3.2.3 of GB/T 14048.1-2023 for uninterrupted duty. It is possible for a

device to have several Ie, depending on utilization category and operational voltages Ue.

6 Product information

Subclause 6.2 of GB/T 14048.1-2023 applies, where applicable, and according to Table

2 below.

In addition to Table 2, all controls accessible to the operator shall be marked to indicate

their function.

7 Normal service, mounting and transport conditions

Clause 7 of GB/T 14048.1-2023 applies.

Standard conditions of vibration are defined in footnote b of Table Q.1 of GB/T

14048.1-2023.

8 Constructional and performance requirements

The main moving contacts of all phase poles of the switching device of a multipole TSE

shall be so mechanically coupled that they make and break substantially together,

whether operated manually, remotely, or automatically.

Parts including stored charge (capacitors) that are removable for servicing (such as coil

replacement), installation, or disconnection shall present no risk of electric energy

hazard after disconnection.

9 Tests

The following tests shall be applied to all possible combinations of manual, remote and

automatic operated transfer switches, respectively.

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