GB/T 14048.3-2017 PDF English
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Low-voltage switchgear and controlgear -- Part 3: Switches, disconnectors, switch-disconnectors and fuse-combination units
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[GB/T 14048.3-2008] Low-voltage switchgear and controlgear -- Part 3: Switches, disconnectors, switch-disconnectors and fuse-combination units
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Low-voltage switchgear and controlgear -- Part 3: Switches, disconnectors, switch-disconnectors and fuse-combination units
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Low-voltage switchgear and controlgear Low-voltage switches, disconnectors, switch-disconnectors and fuse-combination units
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GB/T 14048.3-2017: Low-voltage switchgear and controlgear -- Part 3: Switches, disconnectors, switch-disconnectors and fuse-combination units
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT14048.3-2017
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
Co., Ltd.; Hangzhou Zhijiang Switchgear Stock Co., Ltd. of Hangshen Group;
Shanghai Electric Appliances Ceramics Factory Co., Ltd.; Hangzhou Ganlong Electric
Co., Ltd.; Huanyu Group Co., Ltd.; Socomec Electric (Shanghai) Co., Ltd.; General
Electric Enterprise Development (Shanghai) Co., Ltd.; Sassin international Electric
Shanghai Co., Ltd.; People Electric Appliance Group Co., Ltd.; Shanghai JINGYI
Electrical Apparatus Factory Co., Ltd.; Siemens Ltd. China; Suzhou Electrical
Apparatus Science Academy Co., Ltd.; FATO Mechanical and Electrical Co., Ltd.;
Delixi Electric Co., Ltd.; Shanghai Hugong Electrical Appliance Factory Co., Ltd.; and
Wenzhou Sanshi Electric Co., Ltd.
Chief drafting staffs of this Part. Huang Jingye, Chen Zhengxin, Gu Huimin, Guan
Ruiliang, Fu Kai, Yan Guoyun, Wang Jinxian, Dai Shuidong, Wang Biyun, Zhong
Fangqiang, Liu Guoxing, Ye Jianhua, Luo Liyang, Su Hanlin, Li Zehui, Gu Dekang, Hu
Hongyu, Zhang Min, Gao Wenle, Wu Jianbin, Liang Jinxing, and Huang Xuxiong.
The historical editions replaced by this Standard are as follows.
--- GB 14048.3-1993, GB 14048.3-2002, GB/T 14048.3-2008.
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.
2 Terms, Definitions and Index of Terms
Fuse-disconnector which provides an opening in the circuit on at least one side of the
fuse-link that satisfies the requirements specified for the isolating function.
3 Classification
According to the method of operation of manually operated equipment
4 Characteristics
Utilization categories with suffix B are appropriate for devices which, due to design or
application, are only intended for infrequent operation. This could apply, for example,
to disconnectors normally only operated to provide isolation for maintenance work or
switching devices where the fuse-link blade forms the moving contact.
5 Product Information
The markings for a), b) and c) below shall be on the equipment itself or on a name-
plate or name-plates attached to the equipment, and shall be located at a place such
that they are legible from the front after mounting the equipment in accordance with
the manufacturer's instructions.
6 Normal Service, Mounting and Transport Conditions
Clause 6 of IEC 60947-1 applies with the following addition.
Pollution degree (see 6.1.3.2 of IEC 60947-1).
7 Constructional and Performance Requirements
The strength of the actuating mechanism and the reliability of the indication of the open
position shall be checked according to 8.2.5.Moreover, when means are provided by
the manufacturer to lock the equipment in the open position, locking shall only be
possible when the main contacts are in the open position (see 8.2.5).
8 Tests
A test shall be made to verify the correct mechanical operation of the equipment by 5
closing and opening operations.
Sampling tests for verification of clearances shall be made according to 8.3.3.4.3 of
IEC 60947-1 in accordance with a recognized sampling plan (see GB/T 2828.1).
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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