Foreword
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This standard is developed in accordance with the rules given in GB/T 1.1-2009 Directives for standardization - Part 1: Structure and drafting of standards.
This standard replaces DL/T 320-2010.
In addition to editorial changes, the following main technical changes have been made with respect to DL/T 320-2010:
——The definition of “arc burn” is added (see 3.3);
——The requirements for vertical burning behavior of fabric are changed, and the damaged length is changed from 150mm to 100mm (see 4.1.1.2);
——The test standards for abrasion resistance of fabric are changed, and the relevant contents are changed as the test shall be conducted according to GB/T 30314-2013; the rubbing end point shall be judged according to those specified in GB/T 21196.2-2007 (see 4.1.1.3);
——The requirements and test items for personal arc protective equipment such as arc protective face shield/hood/gloves/shoes cover are reviewed (see 4.2 and Clause 7);
——The flame resistance requirements of the pocket fabric are added in the performance requirements of accessory materials and accessories (see 4.2.2.2);
——The assessment and verification of the overall protective performance of face shields and hoods is added (see 5.2.2);
——The requirement that ATPV, Ebt and mass per unit area shall be indicated in the product marking" is added (see 9.1).
This standard was proposed by the China Electricity Council.
This standard is under the jurisdiction of the National Technical Committee on High-voltage Electric Safety of Standardization Administration of China (SAC/TC 226).
Drafting organizations of this standard: Suzhou Nuclear Power Research Institute (SNPI), State Grid Corporation of China, China Southern Power Grid Company Limited, China Huaneng Group Co., Ltd. and China Datang Corporation Ltd.
Participating drafting organizations of this standard: State Grid Jiangsu Electric Power Co., Ltd., Yunnan Power Grid Co., Ltd. of China Southern Power Grid, Dupont China Group Co., Ltd., Yantai Tayho Advanced Materials Co., Ltd. and Milliken Trading (Shanghai) Co., Ltd.
Chief drafters of this standard: Gu Yansu, Yang Jun, Qiu Ye, Ma Fangyi, Zhang Mai, Wu Junjie, Yu Meiling, Zhao Xiaodong, Zhao Qun, Xu Dongdong, Wang Bing, Jin Junchao, Yang Wenhua, Zhu Zina and Sun Wei.
The previous edition of this standard is as follows:
——DL/T 320-2010.
Any comments or suggestions during the implementation of this standard may be fed back to the Standardization Center of the China Electricity Council (No.1, 2nd Lane, Baiguang Road, Beijing, 100761, China).
Performance requirements of personal arc protective equipment
1 Scope
This standard specifies the technical requirements, test method, matching method, quality inspection rules, use and maintenance as well as marking, instructions, storage and transport, etc. of personal arc protective equipment in electrical workplace.
This standard is applicable to the production, acceptance and use of personal arc protective equipment in power industry.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated reference, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 2912.1 Textiles - Determination of formaldehyde - Part 1: Free and hydrolyzed formaldehyde (water extraction method)
GB/T 3609.1-2008 Occupational eye and face protection - Welding protection - Part 1: Welding protector
GB/T 3917.3 Textiles - Tear properties of fabrics - Part 3: Determination of tear force of trapezoid-shaped test specimens
GB/T 3920 Textiles - Tests for colour fastness - Colour fastness to rubbing
GB/T 3922 Textiles - Tests for color fastness - Color fastness to perspiration
GB/T 3923.2 Textiles - Tear properties of fabrics - Part 2: Determination of maximum force using the grab method
GB/T 4669-2008 Textiles - Woven fabrics - Determination of mass per unit length and mass per unit area
GB/T 5455 Textiles - Burning behaviour - Determination of damaged length, afterglow time and afterflame time of vertically oriented specimens
GB/T 5713 Textiles - Tests for colour fastness - Colour fastness to water
GB/T 7573 Textiles - Determination of pH of aqueous extract
GB/T 8629-2017 Textiles - Domestic washing and drying procedures for textile testing
GB/T 8630 Textiles - Determination of dimensional change in washing and drying
GB/T 12490 Textiles - Tests for colour fastness - Colour fastness to domestic and commercial laundering
GB/T 13640 Size designation of protective clothing
GB/T 13773.2 Textiles - Seam tensile properties of fabrics and made-up textile articles - Part 2: Determination of maximum force to seam rupture using the grab method
GB/T 17592 Textiles - Determination of the banned azo colourants
GB/T 17595 Textiles - Domestic laundering procedure for textile fabrics prior to flammability testing
GB 18401-2010 National general safety technical code for textile products
GB/T 21196.2-2007 Textiles - Determination of the abrasion resistance of fabrics by the Martindale method - Part 2: Determination of specimen breakdown
GB/T 23344 Textiles - Determination of 4-aminoazobenzene
GB/T 30314-2013 Rubber or plastics-coated fabrics - Determination of abrasion resistance - Taber abrader
GA 10-2014 Firemans protective clothing for firefighting
3 Terms and definitions
For the purpose of this document, the following terms and definitions apply.
3.1
arc hazard
personal injury or equipment damage caused by energy released by the arc
3.2
arc hazard energy
energy released by the arc received at the test distance
3.3
arc burn
compound burn to the human body within the injury distance of the strong arc light, which is generated when the current passes through the air medium or the circuit is shorted, including thermal burn caused by electric arc flash and electrical burn caused by electric current penetrating into the body. See Annex A for the severity of arc burn. This standard is applicable to the prevention of thermal burn
3.4
arc protection
protection to reduce the possible harm of arc to human body by blocking the harmful energy of incident arc when an arc occurs, so that the residual energy is not enough to cause degree II and above burns to human body
3.5
arc thermal performance value ATPV
energy value indicating that the energy incident on the arc protection material has a 50% possibility of causing thermal energy to penetrate through the material and just causing degree II burn (determined based on Stoll curve). When the external incident energy is less than the value, the material can effectively block and reduce the passing energy, so as to avoid causing degree II and above burns to human body
3.6
breakopen threshold energy
Ebt
energy value indicating that the energy incident on the single-layer or multi-layer arc protection fabric has a 50% possibility of causing the fabric to break. During the arc protection performance test, the holes with a total area of more than 160mm2 or a single length of more than 25mm on the arc protective fabric are regarded as cracks. For multi-layer arc protective fabric, the holes shall penetrate all layers of the fabric
3.7
inherent flame resistant
flame resistance and heat insulation performance formed due to the molecular structure of the protective material itself, which will not decrease with the condition changes
3.8
after-finishing flame resistant
flame resistance and heat insulation performance for material obtained via dyeing and finishing method by applying a certain amount of chemicals, which will not decrease with the condition changes
3.9
personal arc protective equipment
personal protective equipment used to protect human body that may be exposed to arc related thermal hazards, including arc protective garment, arc protective face shield, arc protective hood, arc protective gloves and arc protective shoes cover
3.10
arc protective garment
protective equipment used to protect human trunk, arms and legs that may be exposed to arc related thermal hazards
3.11
arc protective face shield
protective equipment used to protect human eyes and face that may be exposed to arc related thermal hazards
3.12
arc protective hood
protective equipment used to protect human head and neck that may be exposed to arc related thermal hazards
3.13
arc protective gloves
protective equipment used to protect human hands that may be exposed to arc related thermal hazards
3.14
arc protective shoes cover
protective equipment used to protect human feet that may be exposed to arc related thermal hazards
3.15
protection level of personal arc protective equipment
requirements for defining levels of arc protective performance of personal arc protective equipment. The levels are determined according to those specified in Table 1 based on the ATPV and Ebt of the protective material, of which the lower level shall be the protection level of personal arc protective equipment. When the arc energy incident on the protective material is not higher than the ATPV and Ebt of the protective material, the residual energy is not enough to produce degree II burn or above
4 Technical requirements
4.1 Performance of personal arc protection materials
4.1.1 Performance of protective fabric
4.1.1.1 Arc protection
The arc protection performance of single-layer or multiple-layer personal arc protective fabric (referred to as fabric) shall be tested according to 5.1; the mass per unit area shall be determined according to Method 3 of GB/T 4669-2008. The fabric shall also meet the requirements of ATPV, Ebt and mass per unit area specified in Table 1. For personal arc protection equipment of level 1 and level 2, the mass per unit area of the fabric or the outer fabric shall meet those specified in Table 1. For personal arc protection equipment of level 3 and level 4, if the multi-layer fabric combination is used, the mass per unit area of the outer fabric shall meet those specified in Table 1 for level 1 and level 2; the mass per unit area of the fabric combination shall meet those specified in Table 1 for level 3 and level 4 respectively.
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Technical requirements
5 Test method
6 Matching method
7 Quality inspection rules
9 Marking, instructions for use, storage and transportation
Annex A (Informative) Arc burn
Annex B (Informative) Conversion of arc hazard energy in English unit
Annex C (Informative) Example diagram of personal arc protective equipment
Annex D (Normative) Risk assessment of arc hazard
Annex E (Informative) Calculation method and example of arc hazard energy
Bibliography
