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GB/T 24275-2019: Low-voltage fixed connection enclosed switchgear and controlgear assemblies
Status: Valid GB/T 24275: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 24275-2019 | English | 759 |
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Low-voltage fixed connection enclosed switchgear and controlgear assemblies
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GB/T 24275-2019
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| GB/T 24275-2009 | English | RFQ |
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Low-voltage fixed connection enclosed switchgear and controlgear assemblies
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GB/T 24275-2009
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PDF similar to GB/T 24275-2019
Basic data | Standard ID | GB/T 24275-2019 (GB/T24275-2019) | | Description (Translated English) | Low-voltage fixed connection enclosed switchgear and controlgear assemblies | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | K31 | | Classification of International Standard | 29.130.20 | | Word Count Estimation | 38,350 | | 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 24275-2019: Low-voltage fixed connection enclosed 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 fixed connection enclosed switchgear and controlgear assemblies
ICS 29.130.20
K31
National Standards of People's Republic of China
Replace GB/T 24275-2009
Low voltage fixed closed switch
Equipment 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 2
4 Category 2
4.1 Enclosure Type 2
4.2 Use place 2
4.3 Protection level 2
4.4 Equipment installation surface 2
5 Conditions of use 3
5.1 Normal use conditions 3
5.2 Special use conditions 3
5.3 Transportation, storage and installation conditions 3
6 Structural requirements 4
6.1 Material and component strength 4
6.2 Size 5
6.3 Cabinet structure 5
6.4 Protection level of the complete equipment enclosure 7
6.5 Clearance and creepage distance 7
6.6 Electric shock protection 9
6.7 Selection and installation of switching devices and components 13
6.8 Internal Circuits and Connections 15
6.9 External lead terminal 17
7 Performance requirements 18
7.1 Dielectric properties 18
7.2 Temperature rise 19
7.3 Short circuit protection and short circuit withstand strength 19
7.4 Electromagnetic Compatibility (EMC) 20
8 Design Verification 23
8.1 General 23
8.2 Verification of material and component strength 24
8.3 Protection level verification (IP code) 24
8.4 Clearance and creepage distance verification 24
8.5 Electric shock protection and protection circuit continuity verification 24
8.6 Switching device and component combination 25
8.7 Internal Circuits and Connections 25
8.8 External lead terminal 25
8.9 Dielectric performance verification 25
8.10 Verification of the temperature rise limit 26
8.11 Short-circuit withstand strength verification 26
8.12 Electromagnetic Compatibility Test 28
8.13 Mechanical Operation Test 29
9 routine inspections 29
9.1 General 29
9.2 Degree of protection of the enclosure 30
9.3 Clearance and creepage distance 30
9.4 Protection against electric shock and protection of circuit integrity 30
9.5 Combination of built-in components 30
9.6 Internal Circuits and Connections 30
9.7 External lead terminal 30
9.8 Mechanical operation 30
9.9 Dielectric performance 30
9.10 Wiring, Operational Performance and Features 31
10 Information 31
10.1 Sign 31
10.2 User Manual 32
10.3 Identification of devices and/or components 32
11 Packaging, transport and storage 32
11.1 Packaging and Transportation 32
11.2 Attached materials and documents when packing 32
11.3 Storage 32
Reference 33
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 24275-2009 "Low-voltage fixed closed switchgear and control equipment", and GB/T 24275-
Compared with.2009, the main technical changes are as follows.
--- Removed the overvoltage category (see 5.1.4 of the.2009 edition);
---Modified transportation and storage conditions of complete sets of equipment (see 5.3, 5.3 of.2009 edition);
--- Removed electrical parameters (see Chapter 6 of the.2009 edition);
--- Revised the requirements for the normal heat resistance of insulating materials (see 6.1.4.2, 7.1.4.1 of the.2009 edition);
--- Revised the requirement that insulation materials withstand abnormal heating and ignition capacity (see 6.1.4.3, 7.1.4.2 of.2009 edition);
--- Increased mechanical strength requirements (see 6.1.6);
--- Increased the requirements for isolation, baffle and maintenance accessibility in isolation (see 6.3.2);
--- Modified the enclosure protection level requirements (see 6.4,.2009 version 7.3.6);
--- Removed the strength requirements for the venting holes on the outer casing (see 7.3.2.5 of the.2009 edition);
--- Increased minimum clearance for rated impulse withstand voltage less than 2.5kV (see Table 6.5, Table 7.3.7.4 for.2009 edition)
2);
--- Increased the minimum creepage distance for rated insulation voltages above 320V and above 1000V (see Table 3, Table 3,.2009)
7.3.7.4 Table 3);
--- Increased the degree of protection required for baffles and enclosures (see 6.6.2.3);
---Modified the conditions for the movement or opening of the baffle and the outer casing (see 6.6.2.3, 7.5.1.4 of the.2009 edition);
---Modified the requirements for fault protection (see 6.6.3, 7.5.2 of the.2009 edition);
--- Increased requirements for steady state contact current and charge limitation (see 6.6.5);
---Modified the operation and use conditions of electric shock protection (see 6.6.6, 7.5.3 of.2009 edition);
--- Modified the selection requirements for switching devices and components (see 6.7.1, 7.9.1 of.2009 edition);
---Modified the installation height of the components and devices of the ground-mounted equipment (see Table 6.7.3, Table 7.9.2.2 of the.2009 edition)
11);
--- Increased requirements and verification of internal circuits and connections (see 6.8, 8.7);
--- Increased requirements and verification of external wire terminals (see 6.9, 8.8);
--- Removed the dielectric properties related to air media (see 7.8.1 of the.2009 edition);
--- Modified the main circuit and auxiliary circuit power frequency withstand voltage test voltage value and power frequency withstand test voltage frequency (see 7.1.2,.2009)
7.8.2 of the annual edition;
--- Revised the voltage value of the impulse withstand voltage and the number of surge voltages applied to each pole (see 7.1.3, 7.1.4,.2009 edition)
7.8.1.1, 7.8.1.2, 8.6.2);
--- Modified the method for marking the short-circuit withstand strength (see 7.3.2, 7.6.2 of the.2009 edition);
--- Increased the cooperation of the protection device (see 7.3.4);
--- Removed the electrical connection form of mechanical and electrical operating performance and functional units (see 7.10, 7.11 of.2009 edition);
---Modified the requirements for electromagnetic compatibility (see 7.4, 7.12 of the.2009 edition);
--- Revised the verification method, and revised the type test and the factory test to design verification and routine inspection (see Chapter 8, Chapter 9,.2009).
Chapters 8 and 9 of the annual edition);
--- Added optional power frequency withstand voltage test and DC voltage test (see 8.9.3, 8.9.4);
---Modified the number of mechanical operation tests, increasing the number of design verifications from 50 to.200 (see 8.13,.2009 edition)
8.3);
--- Revised the complete equipment logo and related information (see 10.1.1, 10.1.3,.2009 edition of 10.1.1).
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), Shanghai Youbang Electric (Group) Co., Ltd., Shandong Luyitong
Intelligent Electric Co., Ltd., Daquan Group Co., Ltd., Chengdu Kexing Electric Power Co., Ltd., Zhejiang Bao Electric (Hangzhou) Group Co., Ltd.
Division, Shandong Luquanyuan Electrical Equipment Co., Ltd., Shanghai Baolin Electric Group Co., Ltd., Hangzhou Electric Power Equipment Manufacturing Co., Ltd., Shanghai
Zhongdian Electric Co., Ltd., AIA Electric (Pinghu) Co., Ltd., Changzhou Pacific Electric Power Equipment (Group) Co., Ltd., Huanghua Group Co., Ltd.
Company, Hangzhou Power Equipment Manufacturing Co., Ltd. Xiaoshan Xinmei Complete Electrical Manufacturing Branch, Shanghai Guangdian Electric (Group) Co., Ltd.,
Tianjin Tianchuan Electronic Control Power Distribution Co., Ltd.
The main drafters of this standard. Zhang Lei, Mu Linsen, Lu Lin, Wang Guoliang, Xu Kefeng, Dai Wei, Zeng Qingcai, Jiang Xiaodong, Wang Weigong, Zheng Xiaoyuan,
Jiang Yijun, Zhu Yanhui, Wang Shuai, Yuan Chunping, Chen Futi, Xu Jinyu, Ji Ping, Wang Sha.
The previous versions of the standards replaced by this standard are.
---GB/T 24275-2009.
Low voltage fixed closed switch
Equipment and control equipment
1 Scope
This standard specifies the classification, use conditions, structure and performance of low-voltage fixed-enclosed switchgear and control equipment (set of equipment).
Requirements, design verification, routine inspection, information and packaging, transportation and storage.
This standard applies to rated voltage AC not exceeding 1000V or rated voltage DC not exceeding 1500V, as electric energy distribution, electric
Low-voltage switchgear and control equipment for indoor or outdoor work with machine control, line protection, and closed structure with fixed connection.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only the dated version applies to this document.
For undated references, the latest edition (including all amendments) applies to this document.
GB/T 4025 Human Machine Interface Marker Identification Basic and Safety Rule Indicators and Operator Code Encoding Rules
GB/T 4205 Human Machine Interface Marking Logo Basic and Safety Rules Operating Rules
GB/T 4208 enclosure protection grade (IP code)
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 5169.5 Fire hazard testing for electric and electronic products - Part 5. Tests
Test methods and guidelines
General technical conditions for GB/T 13384 mechanical and electrical product packaging
GB/T 16895.21 Low-voltage electrical installations - Part 4-41. Protection against electric shock
GB/T 17626.2 Electromagnetic compatibility test and measurement technology Electrostatic discharge immunity test
GB/T 17626.3 Electromagnetic compatibility test and measurement technology RF electromagnetic field radiation immunity test
GB/T 17626.4 Electromagnetic compatibility test and measurement technology Electrical fast transient burst immunity test
GB/T 17626.5 Electromagnetic compatibility test and measurement technology Surge (impact) immunity test
GB/T 17626.6 Electromagnetic compatibility test and measurement technology Conducted disturbance immunity of RF field induction
GB/T 17626.8 Electromagnetic compatibility test and measurement technology power frequency magnetic field immunity test
GB/T 17626.11 Electromagnetic compatibility test and measurement techniques Immunity test for voltage dips, short interruptions and voltage changes
GB/T 17626.13 Electromagnetic compatibility test and measurement technology AC power port harmonics, interharmonics and low frequency impedance of grid signals
Disturbance test
GB/T 20138 Protection level of external mechanical collision of electrical equipment casing (IK code)
GB/T 20641-2014 General requirements for empty housings for low-voltage switchgear and control equipment
IEC 60085 Electrical insulation heat resistance assessment and design grading (Electricalinsulation-Thermalevaluationand
Designation)
IEC 60216 (all parts) Electrical insulation materials heat resistance [Electricalinsulatingmaterials-Propertiesof
Thermalendurance(alparts)]
IEC 60364 low voltage electrical installations (all parts) [Low-voltageelectricalinstalations (alparts)]
IEC 60364-5-52 Low-voltage electrical installations - Part 5-52. Selection and installation of electrical equipment (Low-voltage
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