DL/T 320-2019 English PDF (DLT320-2019)

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DL/T 320-2019: Performance requirements of personal arc protective equipment
DL/T 320-2019
Performance requirements of personal arc protective equipment
ICS 13.340
C 73
People's Republic of China Electric Power Industry Standard
Replace DL/T 320-2010
General technical requirements for personal arc protective equipment
2019-06-04 released
2019-10-01 implementation
Issued by National Energy Administration
Table of contents
Foreword...II
1 Scope...1
2 Normative references...1
3 Terms and definitions...2
4 Technical requirements...3
5 Test method...8
6 Selection method...9
7 Quality Inspection Rules...9
8 Operation and maintenance...11
9 Signs, instructions for use, storage and transportation...12
Appendix A (informative appendix) Arc burn...13
Appendix B (informative appendix) English unit conversion of arc hazard energy...14
Appendix C (informative appendix) Examples of personal arc protection equipment...15
Appendix D (informative appendix) Risk assessment of arc hazard...19
Appendix E (informative appendix) Calculation methods and examples of arc hazard energy...20
References...29
Preface
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces DL/T 320-2010 "General Technical Requirements for Personal Arc Protection Equipment".
Compared with DL/T 320-2010, the main technical changes of this standard are as follows except for editorial changes.
--- Added the definition of arc burn (see 3.3);
-Modified the requirements for the vertical burning performance of the fabric, changing the damage length from 150 mm to 100 mm (see 4.1.1.2);
--Modified the standard of fabric abrasion resistance test, modified to test according to GB/T 30314-2013, friction according to
The corresponding regulations in GB/T 21196.2-2007 (see 4.1.1.3) determine the end point;
--Combed the requirements and test items of personal arc protection equipment such as arc protection mask/hood/gloves/shoe cover (see 4.2
And 7);
--- Increase the flame retardant performance requirements of the bag cloth in the performance requirements of accessories and accessories (see 4.2.1.2);
--- Increased the overall performance evaluation and verification of the arc protection mask/hood (see 5.2.2);
--Added the relevant content of ATPV, Ebt, and mass per unit area in the product label (see 9.1).
This standard was proposed by the China Electricity Council.
This standard is under the jurisdiction of the National High Voltage Electrical Safety Standardization Technical Committee (SAC/TC 226).
Drafting organizations of this standard. Suzhou Thermal Power Research Institute Co., Ltd., State Grid Co., Ltd., China Southern Power Grid Co., Ltd.
Company, China Huaneng Group Corporation, China Datang Corporation.
Participated in the drafting of this standard. State Grid Jiangsu Electric Power Co., Ltd., China Southern Power Grid Yunnan Power Grid Co., Ltd.,
DuPont China Group Co., Ltd., Yantai Taihe New Materials Co., Ltd., Milliken Trading (Shanghai) Co., Ltd.
The main 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, Sun Wei.
The previous versions of the standard replaced by this standard are as follows.
--DL/T 320-2010
This standard is the first revision.
The opinions or suggestions during the implementation of this standard are fed back to the Standardization Management Center of the China Electricity Council (Beijing West
No. 1, Er Tiao, Baiguang Road, City District, 100761).
General technical requirements for personal arc protective equipment
1 Scope
This standard specifies the technical requirements, test methods, matching methods, and quality inspections for personal arc protection equipment in electrical work sites.
Inspection rules, use and maintenance, signs, instructions for use, storage and transportation, etc.
This standard applies to the production, acceptance and use of personal arc protection equipment in the power industry.
2 Normative references
The following documents are indispensable for the quotation of this document. For dated reference documents, only the dated version is suitable
Used in this document. For undated references, the latest version (including all amendments) applies to this document.
GB/T 2912.1 Determination of formaldehyde in textiles Part 1.Free and hydrolyzed formaldehyde (water extraction method)
GB/T 3609.1-2008 Occupational eye and face protection welding protection part 1.welding protection equipment
GB/T 3917.3 Textile fabric tearing performance Part 3.Determination of the tearing strength of trapezoidal specimens
GB/T 3920 Textile color fastness test color fastness to rubbing
GB/T 3922 Textile color fastness test Color fastness to perspiration
GB/T 3923.2 Textile fabric tensile properties Part 2.Determination of breaking strength (grab sample method)
GB/T 4669-2008 Determination of mass per unit length and mass per unit area of textile woven fabrics
GB/T 5455 Textile Burning Performance. Determination of Damage Length, Smoldering and Continued Burning Time in the Vertical Direction
GB/T 5713 Textile color fastness test color fastness to water
GB/T 7573 Determination of pH value of textile water extract
GB/T 8629-2017 Household washing and drying procedures for textile testing
GB/T 8630 Determination of dimensional change of textiles after washing and drying
GB/T 12490 Textile color fastness test Color fastness to household and commercial washing
GB/T 13640 Labor protective clothing size
GB/T 13773.2 Joint tensile properties of textile fabrics and their products Part 2.Measurement of joint strength by grabbing method
GB/T 17592 Determination of banned azo dyes in textiles
GB/T 17595 Home washing procedure before textile fabric burning test
GB 18401-2010 National Basic Safety Technical Code for Textile Products
GB/T 21196.2-2007 Textile Martindale Method Determination of abrasion resistance of fabrics Part 2.Measurement of sample damage
GB/T 23344 Textiles-Determination of 4-aminoazobenzene
GB 26859 Electric Safety Work Regulations Power Line Part
GB 26860 Electrical Safety Work Rules for Electrical Parts of Power Plants and Substations
GB/T 30314-2013 Determination of abrasion resistance of rubber or plastic coated fabrics Taber method
GA 10-2014 firefighter fire protection suit
3 Terms and definitions
The following terms and definitions apply to this standard.
3.1
Arc hazard
The energy released by the arc causes personal injury or damage to equipment.
3.2
Arc hazard energy
It refers to the energy released by the arc received at the test distance.
3.3
Arc burn
When the current passes through the air medium or the circuit is short-circuited, a strong arc is generated, which causes compound burns to the human body within the injury distance
It is called arc burn. Including thermal burns caused by arc flash and electrical burns when current penetrates into the human body. Severity of burn
See Appendix A for classification. This standard applies to prevent thermal burns.
3.4
Arc protection
When an arc occurs, by blocking the incident arc hazard energy, the possible harm of the arc to the human body is reduced, and the residual energy
It is not enough to protect the human body from burns of degree II and above.
3.5
Arc thermal performance value, ATPV
Characterized as the energy incident on the arc protection material has a 50% probability of causing the heat energy to penetrate the material to cause a second degree burn.
Value (judged according to the Stoll curve). When the external incident energy is less than this value, the material can effectively block and reduce the transmitted energy to avoid
Avoid burns of II degree and above.
3.6
Breakopen threshold energy, Ebt
The energy value that is characterized as the energy incident on a single-layer or multi-layer arc protection fabric with a 50% probability of causing the fabric to break. Arc
During the protection performance test, when the total area of holes in the arc protection fabric exceeds 160 mm2 or a single hole with a length greater than 25 mm
The hole is a rupture. For multilayer arc protection fabrics, the hole should penetrate all layers of fabric.
3.7
Inherent flame resistant
Relying on the flame retardant and heat insulation properties formed by the molecular structure of the protective material itself, its corresponding performance will not decrease with changes in conditions.
3.8
After-finishing flame resistant
Use a certain dose of chemicals to obtain a certain flame retardancy and heat insulation performance by dyeing and finishing. The corresponding
The performance decreases as conditions change until it disappears.
3.9
Personal arc protective equipment
Protective equipment used to protect humans who may be exposed to arc-related thermal hazards. Including arc protective clothing, arc protective surface
Cover, arc protection hood, arc protection gloves and arc protection shoe covers.
3.10
Arc protective garment
Protective equipment that protects the torso, arms, and legs of persons who may be exposed to arc-related thermal hazards.
3.11
Arc protective face shield
Protective equipment that protects the eyes and faces of persons who may be exposed to arc-related heat hazards.
3.12
Arc protective hood
Protective equipment that protects the head and neck of persons who may be exposed to arc-related heat hazards.
3.13
Arc protective gloves
Protective equipment that protects the hands of persons who may be exposed to arc-related thermal hazards.
3.14
Arc protective shoes cover
Protective equipment that protects the feet of persons who may be exposed to arc-related thermal hazards.
3.15
Protection level of personal arc protective equipment
Classification regulations used to define the arc protection performance of personal arc protection equipment. According to the ATPV and Ebt values of the protective materials according to the table
1 Specify the classification level, and the protection level of personal arc protection equipment shall be the lower of the two. When the electricity incident on the protective material
When the arc energy value is not higher than the ATPV and Ebt values of the protective material, the residual energy is not enough to produce burns of degree II and above.
4 Technical requirements
4.1 Performance of personal arc protection materials
4.1.1 Protective fabric performance
4.1.1.1 Arc protection performance
The arc protection performance of single or multilayer personal arc protection fabrics (hereinafter referred to as fabrics) shall be tested in accordance with 5.1.
The amount should be determined according to method 3 in GB/T 4669-2008.The fabric should reach the ATPV value and Ebt value of arc protection performance in Table 1 at the same time
And the quality per unit area. The fabric or outer fabric unit surface of personal arc protective equipment with protection level 1 and 2
The product quality should meet the requirements of Table 1.For personal arc protective equipment with protection levels 3 and 4, if a combination of multilayer fabrics is used,
The unit area quality of the outer fabric should meet the requirements of Grade 1 and Grade 2 in Table 1; the unit area quality of the fabric combination should reach respectively
The requirements for levels 3 and 4 in Table 1.
4.1.1.2 Flame retardant performance
The protective fabric should have the following flame retardant properties.
a) Vertical burning performance. the vertical burning performance of each layer of single-layer or multi-layer fabrics should be tested according to the GB/T 5455 method.
During the test, the fabric should not be melted or dripping, the length of damage should not be greater than 100 mm, and the continuous burning time should not be large
In 2 s.
b) Flame-retardant durability. the flame-retardant durability test of each layer of single-layer or multi-layer fabrics should be in accordance with GB/T 17595 (temperature 40 °C)
Wash 100 times according to the method of washing, and then test according to GB/T 5455 method. During the test, the fabric should not appear
For melting and dripping phenomena, the damage length should not be greater than 100 mm, and the continuous burning time should not be greater than 2 s.
4.1.1.3 Physical and chemical safety performance
The protective fabric should have the following physical and chemical safety properties.
a) The fabric should not form a conductive loop.
b) The formaldehyde content of the fabric is measured according to the method of GB/T 2912.1 and should meet the requirements of Table 2.
c) The pH value of the fabric is measured according to the method of GB/T 7573 and should meet the requirements of Table 2.
d) The color fastness to water of the fabric is tested according to the GB/T 5713 method, and it should meet the requirements of Table 2.
e) The color fastness of the fabric to acid and alkali perspiration is tested according to the method of GB/T 3922, and it should meet the requirements of Table 2.
f) The color fastness to dry rubbing of the fabric is tested according to the method of GB/T 3920 and should meet the requirements of Table 2.
g) The color fastness of single-layer or multi-layer outer fabrics to domestic and commercial washing is tested according to the GB/T 12490 method.
The condition is 50 ℃ water temperature for 45 minutes, and the color change level of the fabric should meet the requirements of Table 2.
h) The odor detection of the fabric shall be tested according to the method in 6.7 of GB/T 18401-2010, and shall meet the requirements of Table 2.
i) The decomposable aromatic amine dyes of the fabric shall be tested according to the method of GB/T 17592 and GB/T 23344, and shall meet the requirements of Table 2.
begging.
j) When the fabric encounters high temperature, it should be protected by carbonization, and it should not melt or drip.
k) The fabric should be made of materials with intrinsic flame-retardant properties, and materials with post-finish flame-retardant properties should not be used.
l) The high temperature dimensional stability of the fabric is tested according to GA 10-2014 method, the test temperature is (26...