GB/T 22697.2-2008 English PDF

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GB/T 22697.2-2008: Risk assessment for the temperatures of hot surfaces of electrical equipment to be touched -- Part 2: Burn thresholds
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 22697.2-2008	299	Add to Cart	3 days	Risk assessment for the temperatures of hot surfaces of electrical equipment to be touched -- Part 2: Burn thresholds	Valid

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GB 19517   GB/T 25296   GB/T 24612.1   GB/T 22696.4   GB/T 22696.5   GB/T 22697.1   

Basic data

Standard ID: GB/T 22697.2-2008 (GB/T22697.2-2008)
Description (Translated English): Risk assessment for the temperatures of hot surfaces of electrical equipment to be touched -- Part 2: Burn thresholds
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: K09
Classification of International Standard: 29.020
Word Count Estimation: 13,180
Date of Issue: 2008-12-31
Date of Implementation: 2009-11-01
Quoted Standard: GB/T 22697.1-2008
Regulation (derived from): Announcement of Newly Approved National Standards No. 23 of 2008 (No. 136 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 hot surfaces of electrical equipment selection and determination of the risk assessment burns threshold. Heating function device surface burns threshold is not considered within this section.

GB/T 22697.2-2008: Risk assessment for the temperatures of hot surfaces of electrical equipment to be touched -- Part 2: Burn thresholds

---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.
Risk assessment for the temperatures of hot surfaces of electrical equipments to be touched Part 2. Burn thresholds ICS 29.020 K09 National Standards of People's Republic of China Electrical equipment of hot surfaces Risk Assessment Part 2. burns threshold Posted 2008-12-31 2009-11-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Table of Contents

Introduction Ⅲ 1 Scope 1 2 Normative references 1 3 Terms and definitions 4 hot surface temperature factor 1 4.1 body temperature factor 1 4.2 equipment surface material 1 4.3 burns burns temperature threshold value 1 5 burns threshold factor 2 Determines the contact time 2 5.1 5.2 Threshold selection burns 2 5.3 surface appearance 3 6 burns threshold data 3 6.1 contact time 1s ~ 10s burns threshold of 3 6.2 The contact time was 1min or longer burns threshold 4 Appendix A (informative) thermal properties of certain materials 8

Foreword

GB/T 22697 "Electrical Equipment of hot surfaces Risk Assessment" is divided into three parts. --- Part 1. General; --- Part 2. burn threshold; --- Part 3. protective measures. This section is GB/T Part of 222,697. Referring to the development of this part of the CENELEC Guide 29.2007 "Electrical equipment and easy contact with hot surfaces of the risk assessment." This section should be GB/T 22697.1 "hot surfaces of electrical equipment risk assessment - Part 1. General" supporting the use. Appendix A of this section is an informative annex. This part of the National Electrical Safety Standardization Technical Committee (SAC/TC25) and focal points. This part mainly drafted by. Electrical Machinery Industry Beijing Technology and Economy Institute, Shanghai Electrical Apparatus Research Institute (Group) Co., Ltd. Shanghai Institute of electric tools. The main drafters of this section. Li Feng, Ji Yu Hui, Liu Jiang, Fang Xiaoyan, Libang Association, leather bag, has hung Yan, Zhang Liang. This section first release. Electrical equipment of hot surfaces Risk Assessment Part 2. burns threshold

1 Scope

This section presents the hot surface temperature of the electrical equipment of factors affecting data burn threshold factor and burns threshold. This section applies to hot surfaces of electrical equipment selection and risk assessment to determine the burn threshold. Burns hot surface features of the device are not considered within the threshold of this section.

2 Normative references

The following documents contain provisions which, through reference GB/T 22697 in this section constitute provisions of this section. For dated references, All subsequent amendments (excluding corrections) or revisions do not apply to this section, however, encourage an agreement under this section Parties to study the latest versions of these documents. For undated reference documents, the latest versions apply to this section. GB/T 22697.1-2008 Electrical equipment of hot surfaces Risk assessment - Part 1. General

3 Terms and Definitions

Terms and definitions GB/T 22697.1-2008 established in this section apply to GB/T 22697 of.

4 hot surface temperature factor

4.1 body temperature factor Electrical equipment burns depends on human skin after contact with hot temperature and surface temperature of the duration, in practice not only Determination of skin temperature and electrical equipment in contact with hot surfaces in a simple manner. This section does not consider human skin temperature, only prompt electrical When the device is in contact with the hot surface of the skin, the risk of burns may occur. Hot surface temperature of electrical equipment can be used with the appropriate test simply measured. 4.2 equipment surface material Hot surfaces in contact with the process of human skin electrical equipment, resulting in the risk of burns depends on the material composition of the surface equipment, skin and equipment Surface in continuous contact time. Figure 1 depicts the above relationship, and reveals similar thermal performance thresholds and burns also several groups of similar material, tables Surface temperature, surface composition and material relationship with the duration of exposure of the skin. 4.3 burns and burns temperature threshold Burns on the threshold curve represents a certain point, when skin contact with hot surfaces of electrical equipment, in the case of a certain contact time, the Now superficial skin burns and surface temperature of the electrical equipment does not occur between the skin burns. Electrical equipment surface temperature in less burn threshold curve does not usually cause burns, the surface temperature of human skin burns at the threshold Above the curve will cause skin burns occur. FIG 1 only burns threshold descriptive data, for better understanding, FIG. 1 can not be accurately described burns threshold electrical equipment Value, the threshold value should be accurate burns Figures 2 to 6 in Table 2 and selected. If the contact time is very short, depicted in Fig. 1 to 6 in the burn threshold curve is not continuous, but discrete curve. That the case is considered When the contact time is short, the skin begins to burn and burns do not occur between the temperature limit is not perfect but the fact obtained. Burns threshold depends on the following factors. the point of contact of the skin thickness, the skin surface moisture (perspiration), the skin debris contamination (such as oil), then Touch tightness. When the contact time is very long, it is determined burns threshold uncertainty than in the case of short contact time is less, you can specify the exact threshold burns value. Burns difference threshold different group of materials in contact with a very long time the situation will disappear. ......

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