GB/T 14048.6-2016Low-voltage switchgear and controlgear -- Part 4-2: Contactors and motor-starters -- AC semiconductor motor controllers and starters (including soft-starters) (English PDF)

Foreword

GB 14048 "Low-voltage switchgear and control gear" contains the following parts at

present.

- 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 - AC semiconductor motor controllers and

starters (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 devices 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 tests;

- 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 analog output;

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

switch;

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

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

- Part 6-2.Multiple function equipment - Control and protection switching

appliances (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 8.Control units for built-in thermal protection (PTC) for rotating electrical

machines.

This Part is Part 4-2 of GB 14048.The reference number is GB/T 14048.6.

This Part was drafted in accordance with the rules given in GB/T 1.1-2009.

This Part replaces GB 14048.6-2008 "Low-voltage switchgear and control gear - Part

4-2.Contactors and motor-starters - AC semiconductor motor controllers and starters

(including soft-starter)". Compared with GB 14048.6-2008, in addition to some

changes in the text, the main changes are as follows.

- Modify the standard's name;

- In Chapter 3, add terms and definitions. semiconductor switching device,

prospective current (of a circuit and with respect to a switching device), under-

voltage relay or release, under-current relay or release, stall sensitive electronic

overload relay, jam sensitive electronic overload relay, CO operation, O operation,

as well as the list of symbols and abbreviations;

- Delete relevant requirements for characteristics (5.1), marking (6.1) and

performance (8.2.6) of "on-off operation overvoltage";

- To be consistent with the latest requirements of GB 14048.4, improve the

characteristic requirements of overload relays; in Table 4, add overload tripping

classes and associated tripping time;

- Modify the characteristic requirements for overload relays; Specify the requirement

in 5.7.3b) "the maximum tripping time exceeding 40s";

- Modify the criteria for test results for blocking and commutating capability in Table

18;

- Add performance requirements and test methods for under-current relay or release,

stall sensitive electronic overload relay, jam sensitive electronic overload relay;

- Modify the limit requirements of the EMC test, to be consistent with the

requirements of relevant EMC standards;

- Delete Annex B (normative) Overload relays and releases. Put the relevant content

into the text;

- Modify Annex C (normative) Co-ordination at the crossover current between the

starter and associated SCPD, to be consistent with the relevant requirements of

Annex B of GB14048.4;

- Delete Annex D (normative) Requirements for radiated emission tests;

- Delete Annex E (informative) Method for converting radiated emission limit in GB

4824 to equivalent value of emission power;

- Delete Annex H (informative) Terms item agreed by user and manufacturer;

- Add Annex K (normative) Extended functions within electronic overload relays.

This Part uses translation method to identically adopt IEC 60947-4-2.2011 (Edition 3.0)

"Low-voltage switchgear and control gear - Part 4-2.Contactors and motor-starters -

AC semiconductor motor controllers and starters".

The Chinese documents which have consistency with the international normative

references in this Part are as follows.

- GB 755-2008, Rotating electrical machines - Rating and performance (IEC 60034-

1.2004, IDT);

- GB 14048.1-2012, Low-voltage switchgear and control gear - Part 1.General

rules (IEC 60947-1.2011, MOD);

- GB/T16935 (all parts), Insulation coordination for equipment within low-voltage

systems [IEC 60664 (all parts)];

- GB/T17626 (all parts), Electromagnetic compatibility - Testing and measurement

techniques [IEC 61000-4 (all parts)].

This part has made the following editorial changes according to the specific situation

of China.

- IEC 60410.1973 "Sampling plans and procedures for inspection by attributes" is

currently abolished. In the revision documents of the relevant standards of IEC

SC121A, the reference document for this technical content has been changed to

ISO 2859-1.Its corresponding national standard is GB/T 2828.1-2012 "Sampling

procedures for inspection by attributes - Part 1.Sampling schemes indexed by

acceptance quality limit (AQL) for lot-by-lot inspection". Therefore, in this Part,

it uses national standard GB/T 2828.1-2012 as reference;

- Delete the alphabetical index of terms in 3.2 of IEC 60947-4-2.2011.Adjust the

subsequent clauses accordingly in this Part;

- Correct the typo in 5.7.3 b) "... the value of the maximum tripping time...when

this time exceeds 30 s" to "... the value of the maximum tripping time...when this

time exceeds 40 s", to be consistent with the provisions of the second column in

9.3.3.6.5c).

This document was proposed by China Electrical Equipment Industry Association.

This document shall be under the jurisdiction of National Technical Committee on Low

Voltage Electrical Appliances of Standardization Administration of China (SAC/TC

189).

The drafting organizations of this document. Shanghai Electric Apparatus Research

Institute, Zhejiang Chint Electric Co., Ltd., Changshu Switch Manufacturing Co., Ltd.

(formerly Changshu Switch Factory), Shanghai Electric Co., Ltd. People's Electric

Appliance Factory, Changan Group Co., Ltd., People's Electric Appliance Group Co.,

Ltd., Zhejiang High and Low Voltage Electric Appliances Product Quality Inspection

Center, Shanghai Anyiji Intelligent Control System Co., Ltd., Beijing Institute of

Electrical Technology and Economics of Machinery Industry.

Main drafters of this document. Li Hui, Xu Yuanfeng, Kang Zhihong, Zhou Jianxing,

Xu Linlin, Zhu Minglong, Wang Hua, Xu Qijin, Zhu Xiaoge.

Versions of standard substituted by this document are.

- GB 14048.6-1998, GB 14048.6-2008.

1 Scope

This Part of GB/T 14048 applies to a.c. semiconductor motor controllers and starters,

which may include a series mechanical switching device, intended to be connected to

circuits, the rated voltage of which does not exceed 1000 V a.c.

2 Normative references

The following referenced documents are indispensable for the application 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 2828.1-2012, Sampling procedures for inspection by attributes - Part 1.

Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot

inspection (ISO 2859-1.1999, IDT)

3 Terms, definitions, symbols and abbreviations

switching device designed to make and/or break the current in an electric circuit by

means of the controlled conductivity of a semiconductor

any deliberate operation that causes current changes which must be characterized and

controlled (for example jogging, braking)

4 Classification

Subclause 5.2 gives all data which could be used as criteria for classification.

5 Characteristics of a.c. semiconductor motor controllers and starters

A duty in which the controller or starter remains in the FULL-ON state while carrying

a steady current long enough for the equipment to reach thermal equilibrium, but not

for more than 8 h, without interruption.

Subclause 4.3.4.3 of IEC 60947-1.2007 applies, except that the first paragraph is

changed as follows.

6 Product information

Subclause 5.2 of IEC 60947-1.2007 applies to controllers and starters, with the

following additions.

7 Normal service, mounting and transport conditions

Clause 6 of IEC 60947-1.2007 applies, with the following exceptions.

Unless otherwise stated by the manufacturer, controllers and starters are intended for

use in pollution degree 3 environmental conditions (as defined in 6.1.3.2 of IEC 60947-

1.2007). However, other pollution degrees may be considered to apply, depending upon

the microenvironment.

8 Constructional and performance requirements

Subclause 7.1.2.3 of IEC 60947-1.2007 applies.

Subclause 7.1.8.4 of IEC 60947-1.2007 applies with additional requirements as given

in Annex A.

9 Tests

Special tests comprise verification of co-ordination at the crossover current between the

starter and the SCPD (see Annex C) and those tests covered under 9.1.5.2.

Subclause 8.3.3.3.5 of IEC 60947-1.2007 applies, with the following addition.

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