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GB/T 22764.4-2008: Cabinets for low-voltage switchgear -- Part 4: Electrical safety requirements
Status: Valid
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 22764.4-2008 | English | 189 |
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Cabinets for low-voltage switchgear -- Part 4: Electrical safety requirements
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GB/T 22764.4-2008
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Basic data | Standard ID | GB/T 22764.4-2008 (GB/T22764.4-2008) | | Description (Translated English) | Cabinets for low-voltage switchgear -- Part 4: Electrical safety requirements | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | K05 | | Classification of International Standard | 31.240 | | Word Count Estimation | 8,832 | | Date of Issue | 2008-12-30 | | Date of Implementation | 2009-10-01 | | Older Standard (superseded by this standard) | JB/T 10324-2002; JB/T 6753.1-1993; JB/T 6753.2-1993; JB/T 6753.3-1993; JB/T 6753.4-1993; JB/T 6753.5-1993; JB/T 8678-1998 | | Quoted Standard | GB 7251.1; GB 4208 | | Regulation (derived from) | Announcement of Newly Approved National Standards No. 24 of 2008 (No. 137 overall) | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the low voltage cabinet design, requirements, protecting electrical circuit continuity and enclosure protection (IP code). This section applies to low voltage cabinet (hereinafter referred to as products). | GB/T 22764.4-2008: Cabinets for low-voltage switchgear -- Part 4: Electrical safety requirements---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.
Cabinets for low-voltage switchgear Part 4. Electrical safety requirements
ICS 31.240
K05
National Standards of People's Republic of China
Low voltage cabinet - Part 4. Electrical safety requirements
Posted 2008-12-30
2009-10-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
GB/T 22764 "Low Voltage Cabinet" is divided into five sections.
--- Part 1. Generic specification;
--- Part 2. Dimensions Series;
--- Part 3. Climate and Environment;
--- Part 4. Electrical safety requirements;
--- Part 5. Basic test methods.
This section GB/T Part of 422,764. This section should be used with other portions.
This part of the electrical and electronic equipment by the National Standardization Technical Committee integrated structure (SAC/TC34) and focal points.
This section is responsible for drafting unit. million-controlled Group Co., Ltd., Zhangjiagang City Tianyi Electric Co., Ltd. Complete structure.
Participated in the drafting of this section. Wuhan-source structure Electric Co., Zhangjiagang City days more Electric Co., Ltd., Tianjin original cabinet has
Ltd., Jiangsu Tianxiang Electric Co., Ltd. in Hong Kong cabinet Jiangsu days, China Zhenhong Electric Co., Ltd. Cixi Qi State Electric Co.
Division, Wenzhou City Electric Co., locks and Italy.
The main drafters of this section. high Zhong Xi Luo Xuecheng.
The drafters of some of the participants. Songzong Xiang, Zhao Jianming, with Shen Zhang, Zhong Jie, Tang Zhijian, Wu Chun Lin, Jiang Guoqing, Pan Zhengdong.
Low voltage cabinet - Part 4. Electrical safety requirements
1 Scope
This section provides low voltage cabinet design, requirements, protection of electrical continuity and protection provided by enclosures (IP code) circuit.
This section applies to low-voltage cabinet (hereinafter referred to as the product).
2 Normative references
The following documents contain provisions which, through reference GB/T 22764 in this section constitute provisions of this section. For dated reference documents
Member, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section
Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this
section.
GB 7251.1 Low-voltage switchgear and control equipment Part 1. Type - tested and partially type-tested assemblies
(GB 7251.1-2005, idt IEC 60439-1.1999)
GB 4208 housing protection (IP Code) (GB 4208-2008, IEC 60529.2001, IDT)
3 Design
3.1 Overview
Electrical safety designed primarily to prevent the risk of two types.
---electric shock;
--- Burns due to high temperature may be caused by fire and other harmful effects.
Therefore, the basic principles of security is protection against electric shock and thermal effects protection, electric shock protection can be applied to the product, but also can be used in production
Product or part of a device.
Electrical safety design generally consists of low-voltage and low-voltage cabinet manufacturer of complete sets of equipment manufacturers together.
3.2 direct contact with the protection of design requirements
Direct contact protection design should meet the dangers and livestock that may occur in contact with live parts of electrical installations should be protected. This
One kind of protection obtained by the following method.
--- Prevent current from any human or animal body by;
--- Can limit the current through the body, so that it is lower than current shock.
3.3 indirect contact protection design requirements
Indirect contact hazard protection should be designed to meet the humans and livestock in case of failure of the contact with the exposed conductive parts that may arise should the anti
Protection. One of the following methods can be used to obtain this protection.
--- Prevent fault currents from any person or animal body by;
--- Limit fault current through the body to a value lower than the shock current;
--- In case of failure, when a person or animal by touching the exposed conductive parts which may result in a value equal to or greater than the current shock
The current through the body within a specified time automatically cut off power supply.
3.4 Protection against thermal effects of the design requirements
Protection against thermal effects should be designed to meet the product is not dangerous due to high temperature or electric arc and ignite flammable occurred and normal operation of the product
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