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GB/T 24274-2019: Low-voltage withdrawable switchgear and controlgear assemblies
Status: Valid GB/T 24274: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 24274-2019 | English | 679 |
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Low-voltage withdrawable switchgear and controlgear assemblies
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GB/T 24274-2019
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| GB/T 24274-2009 | English | RFQ |
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Low-voltage withdrawable switchgear and controlgear assemblies
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GB/T 24274-2009
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PDF similar to GB/T 24274-2019
Basic data | Standard ID | GB/T 24274-2019 (GB/T24274-2019) | | Description (Translated English) | Low-voltage withdrawable switchgear and controlgear assemblies | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | K31 | | Classification of International Standard | 29.130.20 | | Word Count Estimation | 34,396 | | Date of Issue | 2019-10-18 | | Date of Implementation | 2020-05-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 24274-2019: Low-voltage withdrawable switchgear and controlgear assemblies---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Low-voltage withdrawable switchgear and controlgear assemblies
ICS 29.130.20
K31
National Standards of People's Republic of China
Replace GB/T 24274-2009
Low-voltage withdrawable switchgear and control equipment
Published on.2019-10-18
2020-05-01 implementation
State market supervision and administration
China National Standardization Administration issued
Content
Foreword III
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Category 2
4.1 Classification by purpose 2
4.2 Classification by housing type 2
5 Interface Features 2
5.1 General 2
5.2 Voltage Rating 3
5.3 Current Rating 3
5.4 Rated dispersion coefficient 3
5.5 rated frequency 4
5.6 Other features 4
6 Information 4
6.1 Nameplate 4
6.2 Mark 4
6.3 Other information 5
7 Conditions of use 5
7.1 Normal use conditions 5
7.2 Special conditions of use 6
7.3 Conditions of transport, storage and installation 7
8 Structural requirements 7
8.1 Strength of materials and components 7
8.2 Protection level of the complete equipment enclosure 8
8.3 Clearance, creepage distance and isolation distance 8
8.4 Electric shock protection 10
8.5 Switching device and component combination 12
8.6 Functional unit 15
8.7 Internal Circuits and Connections 15
8.8 Cooling 17
8.9 External lead terminal 17
8.10 Internal isolation of complete sets of equipment 18
9 Performance requirements 19
9.1 Dielectric properties 19
9.2 Temperature rise limit 20
9.3 Short circuit protection and short circuit withstand strength 22
9.4 Electromagnetic Compatibility (EMC) 23
9.5 Electrical operation 23
10 verification 23
10.1 General 23
10.2 Strength of materials and components 23
10.3 Degree of protection for complete sets of equipment 24
10.4 Clearance, creepage distance and isolation distance 24
10.5 Protection against electric shock and protection of circuit integrity 24
10.6 Combination of Switching Devices and Components 25
10.7 Functional unit interchangeability test 25
10.8 Internal Circuits and Connections 25
10.9 External Wire Terminal 25
10.10 Dielectric properties 25
10.11 Temperature rise 25
10.12 Short-circuit withstand strength 25
10.13 Electromagnetic Compatibility 26
10.14 Mechanical Operation 26
10.15 Electrical Operation 27
Appendix A (informative) The insulation level of the complete set of equipment 28
Reference 29
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 24274-2009 "Low-voltage withdrawable switchgear and control equipment", and GB/T 24274-2009
The main technical changes are as follows.
--- Added provisions for other features (see 5.6);
--- Removed the frame size preferences (see 7.1.2 of the.2009 edition);
--- Increased requirements for lifting devices and related verification (see 8.1.5 and 10.2.4);
--- Increased requirements for mechanical collision protection and related verification (see 8.2.1 and 10.3);
--- Increased the rms rms of the test voltage between the disconnected contacts of the equipment (see Table 8.3, Table 4, Table 4.4.2,.2009);
--- Increased requirements for fixed components and related verification (see 8.5.1 and 10.6);
--- Increased baffle requirements and related verification (see 8.5.7 and 10.6);
--- Increased requirements for the selection and installation of unprotected live conductors and related verification (see 8.7.5 and 10.8);
--- Increased cooling requirements (see 8.8);
--- Revised the test voltage value of the main frequency and auxiliary circuit power frequency withstand voltage in dielectric performance (see Table 8 and Table 9 in 9.1.2,.2009)
Version 7.11.3, Table 11 and Table 12);
--- Increased the protection requirements and related verification of surge protection devices (see 9.1.4 and 10.10);
--- Increased the requirements for the cooperation of protective devices (see 9.3.4);
---Modified the verification method, and revised the type test and the factory test to design verification and routine inspection (see Chapter 10,.2009 edition).
Chapter 8);
--- Revised the number of times the impact withstand voltage was applied to each pole of the impact withstand voltage test, and changed it to 5 times 3 times (see 10.10,.2009 edition)
8.2.9);
--- Modified the duration of each pole applied in the selectable power frequency voltage test and DC voltage test, and modified 10ms to
Between 15ms and 100ms (see 10.10, 8.2.9 of the.2009 edition);
--- Increased the temperature rise test method, based on the verification test, added verification verification, verification evaluation method (see 10.11);
--- Modified the number of operations for mechanical operation verification, and changed it to.200 times 50 times (see 10.14, 8.2.18.1 of.2009 edition).
This standard was proposed by the China Electrical Equipment Industry Association.
This standard is under the jurisdiction of the National Low Voltage Switchgear and Control Equipment Standardization Technical Committee (SAC/TC266).
This standard was drafted. Tianjin Electric Science Research Institute Co., Ltd., Wan control Zhizhuang Zhejiang Electric Co., Ltd., Tianjin Tianchuan electronic control equipment
Testing Co., Ltd. (National Electronic Control and Distribution Equipment Quality Supervision and Inspection Center), AIA (Pinghu) Co., Ltd., Tianjin Metrology Supervision
Institute of Testing Science, Wenzhou Longsen Electric Co., Ltd., Shandong Luyitong Intelligent Electric Co., Ltd., Guangdong Changdian Complete Electrical Appliances Co., Ltd.
Company, Chengdu Kexing Power Electric Co., Ltd., Chongqing Zhongheng Electric Co., Ltd., Zhejiang Bao Electric (Hangzhou) Group Co., Ltd., Shandong Lu ability
Yuan Electric Equipment Co., Ltd., Shanghai Baolin Electric Group Co., Ltd., Hangzhou Electric Power Equipment Manufacturing Co., Ltd., Shanghai Yuzhong Electric Co., Ltd.
Division, Shanghai Youbang Electric (Group) Co., Ltd., Daquan Group Co., Ltd., Changzhou Pacific Power Equipment (Group) Co., Ltd., Huang Hua
Group Co., Ltd., Jiangsu Yinjia Enterprise Group Co., Ltd., Hangzhou Electric Power Equipment Manufacturing Co., Ltd. Xiaoshan Xinmei Complete Electrical Manufacturing Co., Ltd.
Division, Shanghai Guangdian Electric (Group) Co., Ltd., Dalian Huarui Heavy Industry Group Co., Ltd. Electronic Control Equipment Factory, Tianjin Tianchuan Electric Control Co., Ltd.
Electric Co., Ltd.
The main drafters of this standard. Liu Jie, Mu Linsen, Li Jingze, Wang Shuai, Ma Ning, Wu Xilei, Xu Kefeng, Huang Guoyong, Zeng Qingcai, Luo Hua, Jiang Xiaodong,
Wang Jianyong, Zheng Xiaoyuan, Zhang Yijun, Zhu Yanhui, Wang Guoliang, Yang Quanbing, Gao Yidong, Chen Futi, Shen Lei, Wang Pengcheng, Yu Jie, Zhang Jie, Han Dongming.
The previous versions of the standards replaced by this standard are.
---GB/T 24274-2009.
Low-voltage withdrawable switchgear and control equipment
1 Scope
This standard specifies the classification, interface characteristics, information, and information of low-voltage withdrawable switchgear and control equipment (hereinafter referred to as complete sets of equipment).
Use conditions, structural and performance requirements, and verification requirements.
This standard is applicable to fixed installation under normal conditions of use in the house. The rated voltage AC does not exceed 1000V, and the DC does not exceed 1500V.
Extraction-type switchgear and control equipment for power distribution and motor control.
Note. The complete set of equipment with rated working voltage AC 1140V can be implemented with reference to this standard. Requirements regarding dielectric properties, etc. are determined by the manufacturer and the user.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article.
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 762-2002 standard current level
GB/T 4025 Human Machine Interface Marker Identification Basic and Safety Rule Indicators and Encoding Rules for Operating Devices
GB/T 4026 Basic and safety rules for human-machine interface markings Identification of equipment terminals and conductor terminals
GB/T 4205 Human Machine Interface Marking Logo Basic and Safety Rules Operating Rules
GB/T 4208 enclosure protection grade (IP code)
GB/T 5169.5 Fire hazard testing for electric and electronic products - Part 5. Tests
Test methods and guidelines
GB/T 7251.1-2013 Low-voltage switchgear and control equipment - Part 1. General
GB/T 7251.12-2013 Low-voltage switchgear and control equipment - Part 2. Complete sets of power switches and control equipment
GB/T 7947 Human-machine interface logo marking basic and safety rules conductor color or alphanumeric identification
GB/T 14048.1 Low-voltage switchgear and control equipment - Part 1. General
GB/T 14048.3 Low-voltage switchgear and control equipment - Part 3. Switch, isolator, isolating switch and fuse combination
GB/T 16935.1-2008 Insulation of equipment in low-voltage systems - Part 1. Principles, requirements and tests
GB/T 20138 Protection level of external mechanical collision of electrical equipment casing (IK code)
General requirements for GB/T 20641 low-voltage switchgear and control equipment
IEC 60085 Electrical insulation heat resistance assessment and design (Electricalinsulation-Thermalevaluationanddesig-
Nation)
IEC 60216 (all parts) Electrical insulation materials heat resistance [Electricalinsulatingmaterials-Thermalendur-
Anceproperties(alparts)]
3 Terms and definitions
The following terms and definitions as defined in GB/T 7251.1-2013 and GB/T 7251.12-2013 apply to this document.
3.1
Withdrawable switchgear and control equipment withdrawableswitchgearandcontrolgearassemblies
Composed of cabinet-type or cabinet-type units with busbars and withdrawable functional units, can be fixed or movable
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