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GB/T 14048.3-2017 English PDF (GBT14048.3-2017)

GB/T 14048.3-2017 English PDF (GBT14048.3-2017)

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GB/T 14048.3-2017: Low-voltage switchgear and controlgear -- Part 3: Switches, disconnectors, switch-disconnectors and fuse-combination units

GB/T 14048.3-2017
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.120.40
K 30
GB/T 14048.3-2017 / IEC 60947-3:2015
Replacing GB/T 14048.3-2008
Low-voltage switchgear and controlgear
– Part 3: Switches, disconnectors, switch-
disconnectors and fuse-combination units
(IEC 60947-3:2015, IDT)
ISSUED ON: DECEMBER 29, 2017
IMPLEMENTED ON: JULY 01, 2018
Issued by: General Administration of Quality Supervision, Inspection and Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 4
1 Basic Requirements ... 9
1.1 Applicable scope and objectives ... 9
1.2 Normative Reference ... 10
2 Terms, Definitions and Index of Terms ... 12
2.1 General ... 12
2.2 Alphabetical index of terms ... 12
2.3 Terms and definitions ... 12
2.4 Summary of the equipment types ... 16
3 Classification ... 16
3.1 According to the utilization category ... 16
3.2 According to the method of operation of manually operated equipment ... 16 3.3 According to suitability for isolation ... 17
3.4 According to the degree of protection provided ... 17
4 Characteristics ... 17
4.1 Summary of characteristics ... 17
4.2 Type of equipment ... 17
4.3 Rated and limiting values for the main circuit ... 18
4.4 Utilization category ... 20
4.5 Control circuits ... 21
4.6 Auxiliary circuits ... 21
4.7 Relays and releases ... 21
4.8 Co-ordination with short circuit protective devices (SCPD) ... 21
5 Product Information ... 21
5.1 Nature of information ... 21
5.2 Marking ... 21
5.3 Instructions for installation, operation and maintenance ... 23
6 Normal Service, Mounting and Transport Conditions ... 23
7 Constructional and Performance Requirements ... 23
7.1 Constructional requirements ... 23
7.2 Performance requirements ... 24
7.3 Electromagnetic compatibility (EMC) ... 28
8 Tests ... 30
8.1 Kind of tests ... 30
8.2 Type tests for constructional requirements ... 32
8.3 Performance ... 32
8.4 Electromagnetic compatibility tests ... 54
8.5 Special tests ... 54
Annex A (Normative) Equipment for Direct Wwitching of a Single Motor ... 56 Annex B (Informative) Items Subject to Agreement between Manufacturer and User ... 63
Annex C (Normative) Single Pole Operated Three Pole Switches ... 64
Annex D (Normative) Switches, Disconnectors, Switch-Disconnectors and
Fuse-Combination Units for Use in Photovoltaic (PV) D.C. Applications ... 67 Bibliography ... 81
Foreword
GB/T 14048 Low-Voltage Switchgear and Controlgear currently include the following parts:
--- Part 1: General rules;
--- Part 2: Circuit Breaker;
--- 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 Behavior under Fault Conditions;
--- 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 8: Control Units for Built-in Thermal Protection (PTC) for Rotating Electrical Machines.
This Part belongs to Part 3 of GB/T 14048.
This Part was drafted as per the rules specified in GB/T 1.1-2009.
This Part replaced GB/T 14048.3-2008 Low-Voltage Switchgear and Controlgear - Part 3: Switches, Disconnectors, Switch-Disconnectors and Fuse-Combination Units. Compared with GB/T 14048.3-2008, this Part has the major technical differences as follows:
--- Delete the definitions of “(mechanical) switch, switch-disconnector, multi-contact system, (mechanical switchgear) dependent manual operation, (mechanical switchgear) independent manual operation, (mechanical switchgear) energy- storage operation” from Clause 2 “Terms and Definitions”; directly refer to IEC 60947-1 for the above-mentioned definitions; additionally, add new terms of “switch-fuse, fuse-switch, disconnector-fuse, fuse-disconnector, switch- disconnector-fuse, and fuse-switch-disconnector”, which are divided into single- opening and double-opening ones; add corresponding terms and definitions under each Clause:
--- Modify Table 1 “Summary of Equipment Definitions”; add the relevant definitions and graphical symbols;
--- Add 4.8 “Co-ordination with short circuit protective devices (SCPD)”; --- Delete 7.1.1, 7.1.2, 7.1.3, 7.1.4, 7.1.5 from “7.1 Constructional Requirements”; the relevant contents can directly refer to IEC 60947-1. Modify sub-clause number of 7.1.6 into 7.1.7; delete 7.1.6.2 and 7.1.6.3; modify sub-clause number of 7.1.8 into 7.1.9;
--- Add 7.2.1.2 “limits of operation of power operated equipment”, 7.2.1.3 “limits of operation of under-voltage relays and release”, and 7.2.1.4 “Limits of operation of shunt release”;
--- Add Note c, d to Table 3;
--- Modify 7.3.1, 7.3.2, 7.3.2.1, 7.3.2.2, 7.3.3.1; the relevant contents can directly refer to IEC 60947-1; modify Table 6;
--- Delete 8.2.5.2 “Method of Test” and 8.2.5.3 “Condition of Equipment during and after test”; the relevant contents shall directly refer to IEC 60947-1; --- Add footnote 2) to a) of 8.3.2.1.3; the original text of IEC only specifies the power factor; due to the test requirements for DC products, this Part supplements the time constant requirements;
--- Add f) to 8.3.2.1.3 “simplified test procedure”;
--- Modify 8.3.3.1 “Temperature-rise”; 8.3.3.3.1 “connecting and breaking capacities, test values and conditions”; and relevant provisions of 8.3.3.5 “leakage current”; --- Delete Paragraph 3 “If a three-pole operated switch of fundamentally the same design has been successfully tested, it is deemed to satisfy the requirements of this annex for an individually operated three pole device.” from C.1 “General”. --- Add normative Annex D “switches, disconnectors, switch-disconnectors and fuse-combination units for use in photovoltaic (PV) d.c. applications”. This Part uses translation method to equivalently adopts IEC 60947-3:2015 (Edition 3.2) Low-Voltage Switchgear and Controlgear - Part 3: Switches, Disconnectors, Switch-Disconnectors and Fuse-Combination Units.
The Chinese documents that have a consistent correspondence with the international documents referenced in Normative References of this Part are as follows: --- GB/T 5465.2-2008 Graphical Symbols for Use on Electrical Equipment - Part 2: Graphical Symbols (IEC 60417-DB: 2006, IDT);
--- GB/T 9254-2008 Information Technology Equipment – Radio Disturbance Characteristics Limits and Methods of Measurement (CISPR 22:2006, IDT); --- GB/T 13539 (all parts) Low-Voltage Fuse (IEC 60269 all parts);
--- GB/T 14048.1-2012 Low-Voltage Switchgear and Controlgear – Part 1: General Rules (IEC 60947-1:2011, MOD);
--- GB/T 14048.2-2008 Low-Voltage Switchgear and Controlgear – Part 2: Circuit Breakers (IEC 60947-2:2006, IDT);
--- GB/T 14048.4-2010 Low-Voltage Switchgear and Controlgear - Part 4-1: Contactors and Motor-Starters - Electromechanical Contactors and Motor- Starters (Including Motor Protector) (IEC 60947-4-1:2009, IDT);
--- GB/T 14048.5-2008 Low-Voltage Switchgear and Controlgear - Part 5-1: Control Circuit Devices and Switching Element - Electromechanical Control Circuit Devices (IEC 60947-5-1:2003, MOD);
--- GB/T 17626.2-2006 Electromagnetic Compatibility(EMC) - Part 4-2: Testing and Measurement Techniques - Electrostatic Discharge Immunity Test (IEC 61000-4-2:2001, IDT);
--- GB/T 17626.3-2006 Electromagnetic Compatibility – Part 4-3: Testing and Measurement Techniques - Radiated Radio-Frequency Electromagnetic Field Immunity Test (IEC 61000-4-3: 2002, IDT);
--- GB/T 17626.4-2008 Electromagnetic Compatibility – Part 4-4: Testing and Measurement Techniques - Electrical Fast Transient/Burst Immunity Test (IEC 61000-4-4:2004, IDT);
--- GB/T 17626.5-2008 Electromagnetic Compatibility – Part 4-5: Testing and Measurement Techniques - Surge Immunity Test (IEC 61000-4-5:2005, IDT); --- GB/T 17626.6-2008 Electromagnetic Compatibility – Part 4-6: Testing and Measurement Techniques - Immunity to Conducted Disturbances Induced by
Radio-Frequency Fields (IEC 61000-4-6:2006, IDT).
This Part makes the following editorial changes according to the specific conditions of China:
--- IEC 60410-1973 Sampling Plans and Procedures for Inspection by Attributes currently has been abolished; in the revised version of IEC SC121A related standard, the reference document for such technical contents have been
changed into ISO 2859-1; its corresponding national standard is GB/T 2828.1- 2012 Sampling Procedures for Inspection by Attribute – Part 1: Sampling Schemes Indexed by Acceptance Quality Limit (AQL) For Lot-by-Lot Inspection; thus, this Part is changed into the reference of national standard of GB/T 2828.1- 2012.
This Part was proposed by China Electrical Equipment Industrial Association. This Part shall be under the jurisdiction of National Technical Committee for Standardization of Low-Voltage Electrical Equipment (SAC/TC 189).
Drafting organizations of this Part: Shanghai Electric Research Institute; Shanghai Electric Research Institute Co., Ltd.; Changshu Switch Manufacturing Co., Ltd. (original Changshu Switch Factory); Legrand Low Voltage Electrical (Wuxi) Co., Ltd.; Shanghai Liangxin Electrical Co., Ltd.; Schneider Wingoal (Tianjin) Electric Equipment Low-voltage switchgear and controlgear
– Part 3: Switches, disconnectors, switch-
disconnectors and fuse-combination units
1 Basic Requirements
The provisions of the general rules dealt with in IEC 60947-1 are applicable to this part, where specifically called for. Clauses and subclauses, tables, figures and appendices of the general rules thus applicable are identified by reference IEC 60947-1, e.g., 4.3.4.1 of IEC 60947-1, Table 4 of IEC 60947-1, or Annex A of IEC 60947-1. 1.1 Applicable scope and objectives
This Part of GB/T 14048 applies to switches, disconnectors, switch-disconnectors and fuse combination units to be used in distribution circuits and motor circuits of which the rated voltage does not exceed 1 000 V a.c. or 1 500 V d.c.
The manufacturer shall specify the type, ratings and characteristics according to the relevant standard of any incorporated fuses.
This Part does not apply to equipment coming within the scope of IEC 60947-2, IEC 60947-4-1 and IEC 60947-5-1; however, when switches and fuse-combination units coming into the scope of this Part are normally used to start, accelerate and/or stop an individual motor they shall also comply with the additional requirements given in Annex A.
The requirements for single pole operated three pole switches are included in Annex C.
Auxiliary switches fitted to equipment within the scope of this part shall comply with the requirements of IEC 60947-5-1.
This part does not include the additional requirements necessary for electrical apparatus for explosive gas atmospheres.
NOTE 1: Depending on its design, a switch (or disconnector) can be referred to as "a rotary switch (disconnector)", "cam-operated switch (disconnector)", "knife-switch (disconnector)", etc. NOTE 2: In this Part, the word "switch" also applies to the apparatus referred to in French as "commutateurs", intended to modify the connections between several circuits and inter alia to

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