Valid

DL/T 320-2019Performance requirements of personal arc protective equipment (English PDF)

Preview PDF

Also coversDLT320-2019

This is a limited preview

Buy now to download the full PDF (39 pages)

Need quotation for your management?

Get a formal quotation for DL/T 320-2019 in 30 minutes.

Issued by

National Energy Administration

Level / Type

National · Recommended

Issue date

June 4, 2019

Implementation date

October 1, 2019

Scope

DL/T 320-2019 (Performance requirements of personal arc protective equipment) is available as an English-translated PDF.

DL/T 320-2019 is the Chinese standard "Performance requirements of personal arc protective equipment".

Its scope clause reads: This Standard specifies the technical requirements, test methods, selection methods, quality inspection rules, use and maintenance as well as marking, instructions for use, storage and transportation of personal arc protective equipment in electrical workplaces.

This Standard applies to the production, acceptance and use of personal arc protective equipment in the electric power trade. Its clauses include terms and definitions; technical requirements; test methods; selection methods; quality inspection rules; use and maintenance; marking, instructions for use, storage and transportation.

It was issued by the National Energy Administration on 2019-06-04 and took effect on 2019-10-01.

Found what you need?

Document preview — DL/T 320-2019

National Standard of the People's Republic of China

ICS: 13.340
Classification: C 73

Issued by: National Energy Administration

Foreword...3
1 Scope...5
2 Normative references...5
3 Terms and definitions...6
4 Technical requirements...9
5 Test methods...15
6 Selection methods...17
7 Quality inspection rules...17
8 Use and maintenance...20
9 Marking, instructions for use, storage and transportation...21
Appendix A (Informative) Arc burn...22
Appendix B (Informative) Conversion to imperial units of arc hazard energy...23
Appendix C (Informative) Figures of personal arc protective equipment...24
Appendix D (Normative) Risk assessment of arc hazard...28
Appendix E (Informative) Arc hazard energy calculation methods and examples...30
Bibliography...39

1 Scope

This Standard specifies the technical requirements, test methods, selection methods, quality inspection rules, use and maintenance as well as marking, instructions for use, storage and transportation of personal arc protective equipment in electrical workplaces.

This Standard applies to the production, acceptance and use of personal arc protective equipment in the electric power trade.

2 Normative references

The following referenced 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 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 colour fastness - Colour fastness to perspiration

GB/T 3923.2, Textiles - Tensile 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

3 Terms and definitions

For the purposes of this document, the following terms and definitions apply.

3.1 arc hazard

Personal injury or damage to equipment caused by the energy released by the arc.

3.2 arc hazard energy

Energy released by the arc and received over the test distance.

3.3 arc burn

Compound burns to the human body – caused by the powerful arc light generated when electric current passes through the air medium or the circuit is short-circuited – within its injuring distance. Thermal burn caused by arc flash and electrical burn caused when electric current breaks down and enters the human body are included. See Appendix A for grading of burn severity. This Standard applies to the prevention of thermal burn.

3.4 arc protection

Protection which is taken – when an arc occurs, by blocking the incident arc hazard energy – to reduce the possible harm of the arc to the human body, so that the residual energy is not enough to cause second-degree or above burns to the human body.

3.5 arc thermal performance value; ATPV

Value characterized by 50% chance that the energy incident on the arc protection material will cause heat energy to penetrate the material and cause second-degree burns (judged based on the Stohr curve). When the external incident energy is less than this value, the material can effectively block and reduce the transmitted energy to avoid causing second-degree and above burns to the human body.

4 Technical requirements

4.1 Performance of personal arc protective materials

4.1.1 Performance of protective fabrics

4.1.2 Performance of protective face shield

4.1.2.1 Arc protection performance

The arc protection performance of personal arc protective face shield materials (referred to as face shield) shall be tested according to the method specified in 5.2, and shall meet the requirements for arc protection performance ATPV in Table 3.

4.1.2.2 Shock resistance

The shock resistance of the face shield shall be tested according to the method specified in 6.8 of GB/T 3609.1-2008.After the test, there shall be no flying debris and the lens shall not be damaged.

4.2 Design and performance requirements for personal arc protective equipment

4.2.1 General requirements

Personal arc protective equipment shall meet the requirements of wearing comfort while ensuring protection. It shall have corporate marking, name tag and other patches, where metal parts are strictly prohibited. See Appendix C for sample diagrams.

4.2.2 Design and performance requirements for arc protective garment

4.2.3 Design and performance requirements for arc protective face shield and arc

protective hood

4.2.4 Design and performance requirements for arc protective gloves and arc

protective shoes cover

The design and performance of arc protective gloves (referred to as gloves) and arc protective shoes cover (referred to as shoes cover) shall comply with the requirements in Table 7.

5 Test methods

5.1 Fabric arc protection performance test

5.1.1 Test sample and preparation

5.1.1.1 Requirements for test sample

Before testing the arc protection performance of fabrics, ensure that the fabrics pass the flame-retardant property test.

5.1.2 Test process

5.1.2.1 Requirements for the number of samples and valid data points

For ATPV testing of fabric samples, at least 7 groups of samples shall be used. During the test, different incident energies are obtained by adjusting the arc duration. During the ATPV calculation, the number of valid data points for incident energy shall not be less than 21.

5.2 Face shield arc protection performance test

5.2.1 Face shield material arc protection performance test

The face shield material arc protection performance test shall be carried out on at least

24 material samples.

5.2.2 Evaluation and verification of overall protection performance of head shield

and hood

6 Selection methods

6.1 Selection principles

6.1.1 Principles for configuring protective equipment

Anyone entering an electrical workplace should be configured with protective equipment if the person may face arc energy greater than 25.1 J/cm2 after arc risk analysis or the place may have arc hazard.

6.2 Equipment requirements

6.2.1 Requirements for arc protection performance of personal arc protective

equipment

The arc protection performance of personal arc protective equipment (characterized by

ATPV and Ebt arc values) shall be higher than the arc hazard level of the workplace.

7 Quality inspection rules

7.1 Type test

7.1.1 Scope of application

Type test shall be carried out under the following circumstances.

7.1.2 Test items

Type test items are shown in Table 9.

7.2 Exit-factory test

7.2.1 Batching rules

Products of the same batch of raw materials and the same process conditions shall be grouped into one batch.

8 Use and maintenance

8.1 Inspection before use

Inspection contents before use are as follows.

8.2 Cleaning and requirements during use

Cleaning and requirements during use are as follows.

9 Marking, instructions for use, storage and transportation

9.1 Marking

The marking shall include the following.

9.2 Instructions for use

Instructions for use shall at least include correct use, care and maintenance methods.

9.3 Storage

The product shall be stored in a dry and ventilated place, away from direct sunlight, and must not be mixed with corrosive items.

......

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 39 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 3609.1-2008

How to Download DL/T 320-2019

1
Add to cart
Click "Download PDF" on this page and choose "Buy this standard". You can add more standards before checkout.
2
Checkout
Enter your email and billing details. Payment is processed securely by Stripe (cards or bank transfer). Prefer bank details? Request a quotation (min. order $300).
3
Instant delivery (0–9 sec)
Delivery is automatic: within seconds of payment you'll receive an email with a secure download link. The link stays valid for 72 hours.
4
Invoice included
A tax invoice is attached to the confirmation email. Need a custom invoice? Contact us.