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GB/T 14048.5-2017 English PDF (GBT14048.5-2017)

GB/T 14048.5-2017 English PDF (GBT14048.5-2017)

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GB/T 14048.5-2017: Low-voltage switchgear and controlgear -- Part 5-1: Control circuit devices and switching element -- Electromechanical control circuit devices

GB/T 14048.5-2017
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.120.40
K 31
Replacing GB/T 14048.5-2008
Low-voltage switchgear and controlgear -
Part 5-1: Control circuit devices and switching
element - Electromechanical control circuit devices
(IEC 60947-5-1:2016, MOD)
ISSUED ON: NOVEMBER 01, 2017
IMPLEMENTED ON: MAY 01, 2018
Issued by: General Administration of Quality Supervision, Inspection and Quarantine of the PRC;
Standardization Administration of the PRC.
Table of Contents
Foreword ... 4
1 General ... 8
2 Terms and definitions... 12
3 Classification ... 22
4 Characteristics ... 23
5 Product information ... 29
6 Normal service, mounting and transport conditions ... 32
7 Constructional and performance requirements ... 34
8 Tests ... 45
Annex A (Normative) Electrical ratings based on utilization categories (see 3.1) ... 66 Annex B (Normative) Example of inductive test loads for d.c. contacts ... 68 Annex C (Normative) Special tests - Durability tests ... 70
Annex D Vacant ... 74
Annex E (Normative) Items subject to agreement between manufacturer and user .. 75 Annex F (Normative) Class II control circuit devices insulated by encapsulation - Requirements and tests ... 76
Annex G (Normative) Additional requirements for control circuit devices with integrally connected cables ... 81
Annex H (Normative) Additional requirements for semiconductor switching elements for control circuit devices ... 84
Annex J (Normative) Special requirements for indicator lights and indicating towers ... 91
Annex K (Normative) Special requirements for control switches with direct opening action ... 99
Annex L (Normative) Special requirements for mechanically linked contact elements ... 105
Annex M (Normative) Terminal marking, distinctive number and distinctive letter for control circuit devices ... 109
Annex N (Normative) Procedure to determine reliability data for electromechanical devices in control circuits used in functional safety applications ... 115 Bibliography... 118
Foreword
“Low-voltage switchgear and controlgear” consists of the following parts: - 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 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 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; - Section 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 is Part 5-1 of “Low-voltage switchgear and controlgear”.
This Part is drafted in accordance with the rules given in GB/T 1.1-2009. This Part replaces GB/T 14048.5-2008 “Low-voltage switchgear and
controlgear - Part 5-1: Control circuit devices and switching element - Electromechanical control circuit devices”.
As compared with GB/T 14048.5-2008, the main technical changes of this Part are as follows:
- Delete the characteristic requirements related to the overvoltage of make- break operation (see 4.9 of the 2008 edition);
- ADD polarity requirements for contact elements (see 4.10);
- ADD the information content which the manufacturer shall provide [see 5.1 o)~5.1 p)];
- Modify the marking requirements for terminals, emergency stop, etc. (see 5.2.1~5.2.4; 5.2.1~5.2.4 of the 2008 edition);
- ADD the requirements for glow-wire testing and test based on flammability category (see 7.1.2.2, 7.1.2.3);
- Modify the requirements for clearances and creepage distances; and
directly QUOTE the corresponding provisions of IEC 60947-1 (see 7.1.4;
7.1.3 of the 2008 edition);
- ADD requirements related to maximum recovery time (see 7.2.8);
- Modify the requirements related to immunity (see 7.3.2; 7.3 of the 2008 edition);
- ADD types of special tests which can be performed, including damp heat, salt mist, vibration, and shock tests, etc. (see 8.1.5);
- ADD requirements of electrical performance and ageing test for screwless- type clamping units (see 8.2.4.7~8.2.4.8);
- ADD speed requirements for movement rotary switches (see 8.3.2.1);
- Modify the requirements for adjustment of prospective current in the test circuit and test quantities (see 8.3.4.3; 8.3.4.3 of the 2008 edition); - ADD EMC tests (see 8.4);
- ADD Figure 10 “Voltage drop measurement at contact point of the clamping unit or terminal” (see 8.4.4);
- Delete Annex D “Clearances and creepage distances of control circuit
devices” and left vacant;
- Modify the provisions of pulling force for cable in the pull-out test (see G.8.2.2; G.8.1.1 of the 2008 edition);
- Modify the general requirements for EMC verification test and immunity test of control circuit devices with semiconductor switching elements (see
H.8.7.1~H.8.7.2; H.8.7.1~H.8.7.2 of the 2008 edition);
- Delete the requirements related to lens color (see Annex J);
- ADD the provisions of terminal marking, distinctive number, and distinctive letter for control circuit devices (see Annex M);
- ADD the provisions of “Procedure to determine reliability data for
electromechanical devices in control circuits used in functional safety applications” (see Annex N).
This Part uses redraft law to modify and adopt IEC 60947-5-1:2016 “Low- voltage switchgear and controlgear - Part 5-1: Control circuit devices and switching elements - Electromechanical control circuit devices”.
The technical differences between this Part and IEC 60947-5-1:2016 and their reasons are as follows:
- About normative references, this Part has made adjustments with technical differences, to adapt to the technical conditions of China. The adjustments are reflected in Clause 2 “Normative references”. The specific adjustment is as follows:
 ADD the national standard GB/T 14048.1-2012 “Low-voltage
switchgear and controlgear - Part 1: General rules”.
- In 7.1.2.1 “General requirements”, the requirement for humidity resisting qualities of materials is changed to “in accordance with the provisions of Annex K of GB/T 14048.1-2012”. Since IEC 60947-5-1:2016 does not put
forward specific requirements, only “special attention shall be called” is written, which cannot meet the actual test verification needs in China, so this requirement is modified;
- ADD subclause 8.2.1.2 “Humidity resisting qualities test” to the content related to materials in Clause 8 “Tests”. Since this Part has modified the specific requirements for humidity resisting qualities of materials in 7.1.2.1, this content is added.
This Part was proposed by China Electrical Equipment Industry Association. This Part shall be under the jurisdiction of National Technical Committee 189 on Low-voltage Apparatus of Standardization Administration of China (SAC/TC 189).
Drafting organizations of this Part: Shanghai Electrical Apparatus Research Institute; Zhejiang CHINT Electrics Co., Ltd.; Xiamen Hongfa Electrical Safety and Controls Co., Ltd.; Shanghai Liangxin Electrical Co., Ltd.; Omron Automation (China) Co., Ltd.; Shanghai Renmin Electrical Apparatus Works, Shanghai Electric; Shanghai Tayee Electric Co., Ltd.; Shanghai Branch of Schneider Electric (China) Co., Ltd.; Siemens Electrical Apparatus Ltd., Suzhou; Delixi Electric Co., Ltd.; FATO Mechanical and Electrical Equipment Group Co., Ltd.; Suzhou Electrical Apparatus Science Research Institute Co., Ltd.; People Electric Appliance Group Co., Ltd.; Changan Group Co., Ltd..
Main drafters of this Part: Zhang Lili, Li Hui, Xiao Tifeng, Cao Yong, Li Yuchun, Cui Yulan, Zheng Yan, Chen Xiao, Wang Yixu, Zhu Lin, Li Xinye, Gao Wenle, Zhang Jie, Bao Zhizhou, Wang Xuchuan.
The previous editions of the standard replaced by this Part were released as follows:
- GB 14048.5-1993, GB 14048.5-2001, GB/T 14048.5-2008.
Low-voltage switchgear and controlgear -
Part 5-1: Control circuit devices and switching
element - Electromechanical control circuit devices
1 General
1.1 Scope and object
This Part of “Low-voltage switchgear and controlgear” applies to control circuit devices and switching elements intended for controlling, signalling, interlocking, etc., of switchgear and controlgear.
This Part applies to control circuit devices having a rated voltage not exceeding 1000 V a.c. (at a frequency not exceeding 1000 Hz) or 600 V d.c.
However, for operational voltages below 100 V a.c. or d.c., see 4.3.2.2. This Part applies to specific types of control circuit devices such as: - manual control switches, for example push-buttons, rotary switches, foot switches, etc.;
- electromagnetically operated control switches, either time-delayed or instantaneous, for example contactor relays;
- pilot switches, for example pressure switches, temperature sensitive
switches (thermostats), programmers, etc.;
- position switches, for example control switches operated by part of a machine or mechanism;
- associated control circuit equipment, for example indicator lights, etc. Note 1: A control circuit device includes (a) control switch(es) and associated devices such as (an) indicator light(s).
Note 2: A control switch includes (a) switching element(s) and an actuating system. Note 3: A switching element can be a contact element or a semiconductor element. This Part also applies to specific types of switching elements associated with other devices (whose main circuits are covered by other standards) such as: - auxiliary contacts of a switching device (e.g. contactor, circuit breaker, etc.)

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