GB 6568.1-2000 Shielding clothing for live working

This standard applies to a kind of shielding clothing worn by the power industry to protect the human body from the influence of high-voltage electric fields and electromagnetic waves when performing live-line work on high-voltage equipment with an AC voltage of 500kV or less. GB 6568.1-2000 Shielding clothing for live-line work GB6568.1-2000 Standard download decompression password: www.bzxz.net

GB6568.1-2000
This standard adopts IEC60895:1987 "Shielding Clothing for Live Working with AC Voltage Levels of 800kV and Below", and revises GB6568.1-1986 "Shielding Clothing for Live Working". This international standard is adopted in the main technical indicators, and the writing format and rules are based on GB/T1.1-1993 "Guidelines for Standardization Work Unit 1: Rules for Drafting and Expression of Standards Part 1: Basic Regulations for Standard Writing".
When revising GB6568.1-1986 by adopting IEC60895, the contents in GB6568.1-1986 that have been proven to be suitable for my country's situation and do not hinder international use are also retained. According to the provisions of GB/T1.1--~1993, the foreword of this international standard is retained. This standard is arranged in accordance with GB/T1.1-1993, and two chapters are added, namely: Chapter 1: Scope, Chapter 2: Reference Standards; Chapter 1: Terminology in the original standard is Chapter 3: Definitions of this standard. In addition, Chapter 4: Classification is added. From the date of implementation, this standard will replace GB6568.1-1986. This standard was proposed by the Electric Power Department of the State Economic and Trade Commission. This standard is under the jurisdiction of the National Technical Committee for Standardization of Live Working. The drafting units of this standard are: Wuhan High Voltage Research Institute, Wuhan Power Supply Bureau. The main drafters of this standard are: Zhang Lihua, Zhang Yingping, Yi Hui, Li Hansheng, Ou Qihe. This standard was issued in July 1986 and revised in July 2000. This standard is interpreted by the National Technical Committee for Standardization of Live Working. 73
GB6568.1—2000
IEC Foreword
1) This formal technical decision or agreement of the International Electrotechnical Commission is prepared by the participation of all the national committees of the committee that are particularly interested in this matter. It expresses the international opinions on this matter as much as possible. 2) This standard is recommended for use internationally so that member countries can accept it. 3) In order to promote international unification, the International Electrotechnical Commission hopes that member countries will adopt its recommended standards as much as possible. If there is any difference between the recommended standards and the corresponding national standards of member countries, they should be clearly stated in their national standards as much as possible. This standard was prepared by IECTC78 Technical Committee on Live Working Tools. Six-month method
78 (Central Office) No. 15
Voting Communiqué
78 (Central Office) No. 21
All information on the voting in favor of this standard can be found in the voting communiqué in the table above. This standard refers to the following International Electrotechnical Commission publications: IEC50 (151): 1987 International Electrotechnical Vocabulary Chapter 151 - Electromagnetic Equipment
IEC212: 1971 Standards for use before and during testing of solid insulating materials IEC456: 1974 Methods for measuring the performance of electrical clothing for household washing machines, Amendment 1 (1980) Other publications cited: International Standards Association Standard IEC479: 1975 Publication - Natural Dimensions - Designations and Tolerances Bearing Part - Balls for Rolling Bearings
IEC3290: 1975 Rolling bearings -
1 Scope
National Standard of the People's Republic of China
Screen clothes for live working
Screen clothes for live working GB 6568.1—2000
eaVIEC608951987
Generation GB6568.1--1986
This standard applies to the shielding clothing worn by workers when performing live work on 10kV500kV electrical equipment. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and the parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T 1335.1~1997 Clothing size for men GB/T2662-1999 Cotton clothing
GB/T2668-1993 Specifications for men's and women's single suits GB6568.2-2000 Test methods for shielding clothing for live working GB/T14286-1993 Terminology for live working (neIEC60743:1983) FZ/T81007-1994
Men's and women's single suits
3 Definitions
In addition to complying with the provisions of GB/T14286, this standard also adopts the following definitions. 3.1 Shunt conductive wire A metal soft wire placed at the seams of clothes, trousers, socks, skirts, gloves, etc. that can bear the main current path in the clothes and ensure good electrical connection.
3.2 Equipotential binding jumper During the equipotential operation, the connecting wire that makes the shielding suit and the high-voltage charged body form an equal potential is called an equipotential binding jumper. The end of this line is attached with a connecting plug.
3.3 Shielding efficiency Shielding efficiency is a relative indicator to measure the shielding performance of shielding clothing materials, expressed as SE. Shielding efficiency is the decibel value of the ratio of the voltage on the receiving electrode (Uret) when there is no shielding to the voltage on the receiving electrode (U) after shielding, that is: Ur
SE=20 lg()
3.4 ​​Clothing material electric resistance The DC resistance value within a circular area on the surface of the clothing. The size of this circular area is the difference between the area of ​​a circle with a diameter of 114mm and the area of ​​a circle with a diameter of 44mm. This resistance value can reflect the quality of the conductive material and the size of the contact resistance of the mesh intersection of the conductive material. It is an important indicator to measure the conductive performance of the shielding clothing material. 3.5 Complete clothing current-carrying capability After the shielding clothing parts are connected into a whole, a certain power frequency current value passes between any two farthest ends of the clothing and after a certain thermal stability period, the current when the local temperature rise at any point on the clothing reaches the specified limit is the current carrying capacity of the complete clothing. It is a comprehensive indicator for measuring shielding clothing.
4 Classification
According to different use conditions, shielding clothing can be divided into two categories, see Table 1. Table 1 Classification
5 Requirements
5.1 General description
Shielding efficiency, dB
Fusing current, A
Shielding clothing should have good shielding performance, low resistance, appropriate current carrying capacity, certain flame retardancy and good wearing performance. The parts of the shielding clothing should be reliably electrically connected through two detachable connectors, and it should be ensured that the connectors will not be disconnected during operation.
5.2 Clothing material requirements
5.2.1 Shielding efficiency
According to the test method in 3.1 of GB6568.2-2000, the shielding efficiency of the clothing material shall not be less than 40dB5.2, 2 Resistance
According to the test method in 3.2 of GB6568.2-2000, the resistance of the new shielding clothing material shall not be greater than 800m. 5.2.3 Clothing material fusing current
According to the test method in 3.3 of GB6568.2-2000, the fusing current of type 1 shielding clothing material shall not be less than 5A, and the fusing current of type 1 shielding clothing material shall not be less than 30A.
5.2.4 Electric spark resistance
Clothing material shall have a certain ability to resist electric sparks, and shall not burn when the high-frequency spark discharge generated by the charging capacitor is discharged, but only carbonize without the spread of open flames.
According to the test method in 3.4 of GB6568.2-2000, after 2 minutes of electric spark resistance test, the carbonization damage area of ​​clothing material shall not be greater than 300 mm2.
5.2.5 Flame resistance
When clothing material comes into contact with open flames, it must be able to prevent the spread of open flames. According to the method 3.5 of GB6568.2-2000, the carbon length of the test sample shall not be greater than 300mm, the burnt area shall not be greater than 100cm, and the burnt area shall not spread to the edge of the sample. 5.2.6 Washing resistance
To ensure that the electrical and flame retardant properties of the clothing are not significantly reduced after multiple washings, according to the method 3.6 of GB6568.2--2000, the clothing should undergo 10 "washing-drying" processes. After the clothing has been washed, its technical performance should meet the requirements shown in Table 2. Table 2 Technical performance of clothing washing
5.2.7 Sweat corrosion resistance
Shielding efficiency.dB
Fusing current, A
Ceramic, 0
Carbonized area, cm
Human sweat has a certain corrosive effect on the conductive material in the shielding suit. According to the test method in 3.7 of GB6568.2-2000, 76
G 6568.1--2000
Carry out acid sweat corrosion and alkaline sweat corrosion test of the clothing respectively, and detect the resistance value respectively. It shall not be greater than 1. 5.2.8 Wear resistance
The clothing must be wear-resistant to ensure that the clothing has a certain durability. According to the method in 3.8 of GB6568.2-2000, after 500 friction tests, the clothing resistance shall not be greater than 10, and the clothing shielding efficiency shall not be less than 30dB. 5.2.9 Breathability
The clothing should have a large breathability to achieve the wearer's comfortable self-protection. According to the method 3.9 of GB6568.2-2000, the air flow rate through the fabric shall not be less than 35L/(m2.s). 5.2.10 Breaking strength and elongation at break
According to the method 3.10 of G36568.2--2000, for conductive fiber fabrics, the warp breaking strength of the fabric shall not be less than 343N, the weft breaking strength shall not be less than 294N, and the warp and weft breaking elongation shall not be less than 10%; for conductive coating fabrics, the warp breaking strength of the fabric shall not be less than 245N, the weft breaking strength shall not be less than 245N, and the warp and weft breaking elongation shall not be less than 10%. 5.3 Finished product requirements
5.3.1 Tops and pants
To ensure that the resistance of the entire shielding suit is not greater than the specified value, the resistance between any two farthest ends of the top and pants shall not be greater than 15Ω according to the method in 4.1 of GB6568.2--2000. 5.3.2 Gloves and socks
Measured according to the method in 4.2 of GB6568.2--2000, the resistance of gloves and socks shall not be greater than 150Ω. 5.3.3 Shoes
Measured according to the method in 4.3 of GB6568.2--2000, the resistance of shoes shall not be less than 500Ω. 5.3.4 Hats
The hat must pass the shielding effect test, and the shielding effect of the hat shall be tested together with the shielding performance test of the entire suit. The protective cover and the extended edge of the hat must ensure that the exposed parts of the human body (such as the face) do not feel uncomfortable, and it should be ensured that the surface field strength of the exposed parts of the human body shall not exceed 240kV/m under the highest operating voltage. The electrical connection between the hat and the coat must be good. 5.3.5 The whole set of shielding clothing (coat, pants, gloves, socks, hat, shoes) can be appropriately strengthened with double-layer clothing materials for the easily exposed parts such as knees, buttocks, elbows and palms of the shielding suit to improve the durability of the whole set of shielding clothing.
To ensure that the resistance and shielding performance of the whole set of shielding clothing meet the requirements of this standard, the assembled whole set of shielding clothing should be tested and inspected. According to the method 4.4 in GB6568.2-2000, the resistance test of the whole set of clothing is carried out. Check the resistance of the farthest points of the whole shielding suit, and its value shall not be greater than 200
According to the methods 4.5 and 4.6 of GB6568.2-2000, the shielding performance test of the whole shielding suit is carried out. Under the specified voltage level, measure the surface field strength of the three parts of the clothes, such as the chest, the back and the top of the head in the hat, and the value shall not be greater than 15kV/m. Measure the local surface field strength of the exposed parts of the human body (such as the face), and its value shall not be greater than 240kV/m; measure the current flowing through the human body in the shielding suit, and its value shall not be greater than 50uA.
According to the method 4.7 of GB6568.2-2000, carry out the current capacity test of the whole shielding suit. Pass the specified power frequency current through the shielding suit, and after a certain period of thermal stability, measure the overflow of any part of the shielding suit, and its value shall not exceed 50℃. 5.3.6 Shunt connection wires and connectors
In order to ensure that the whole set of shielding clothing has a large current capacity and a small resistance, shunt connection wires should be placed in appropriate parts such as tops, pants, gloves, socks, and socks. The cross-sectional area of ​​each shunt connection wire of type 1 shielding clothing should be no less than 1mm\, and the cross-sectional area of ​​each shunt connection wire of type 2 shielding clothing should be no less than 4mm, and should have appropriate mechanical strength so that it is not easy to break. Tops and pants should have two independent shunt connection wires and connector channels.
Each part of the top, pants, hat, gloves, socks, etc. should have a connector. If the gloves and tops or the socks and pants can be electrically conductive through direct contact with the clothes, only one connector can be installed on each. 77
Shielding clothing size
6.1 Size of tops and trousers
GB 6568.1—2000
According to the relevant provisions of GB/T1335.1, both tops and trousers should be of 5.3B series. According to the relevant provisions of GB/T2668, the tops (including top and bottom) should be of sizes 165/93, 170/96, 175/99, 180/102, 185/105; the trousers should be of sizes 165/84, 170/87, 175/90, 180/93, 185/96. 6.2 Sizes of hats, gloves and socks
6.2.1 Sizes of hats
According to the head circumference of the wearer, five sizes of 57, 58, 59, 60 and 61 cm are selected. 6.2.2 Sizes of gloves
Two sizes of large and medium are selected.
6.2.3 Sizes of socks
Four sizes of 25, 26, 27 and 28 cm are selected. 6.3 Sizes of shoes
According to the national unified shoe size specification of one yuan per shoe size, four shoe sizes of 25, 26, 27 and 28 cm are selected; the width of shoes is type III. 6.4 Sizes of cotton clothes
According to the relevant provisions of GB/T1335.1, cotton tops and cotton trousers are all in 5.3B series. The specifications of cotton tops are 165/99, 170/102, 175/105, 180/108, 185/108, etc.; the specifications of cotton trousers are 165/90, 170/93, 175/96, 180/99, 185/99. 7 Inspection rules
7.1 Type inspection
7.1.1 When the factory is trial-making new products or changing raw materials and process, the products should be subjected to type inspection. The items of type inspection are all those specified in GB6568.2. See Table 3 for type test. Table 3 Type inspection
Shielding efficiency, dB
Fusing current, A
Washing resistance
Inspection items
Resistance, 0
Spark resistance, mm2
Type 1 shielding suit
Type 1 shielding suit
Type 1 shielding suit
Type 1 shielding suit
Charcoal length, mm
Burning area, cm2
Clothing resistance,|| tt||Burning damage area, cm2
Shielding efficiency
Fusing current
Standard value
Complete shielding suitwwW.bzxz.Net
≤100
Breaking strength, N
Inspection items
G6568.1-2000
Table 3 (end)
Sweat corrosion resistance
Resistance,
Screen knocking efficiency
Breathability, L/(m2·s）
Elongation at break, %
Electric field strength on body surface, kV/m
Electric field strength on exposed parts, kV/m
Human body current, μA
Current capacity at S0C temperature rise, A
7.2 Sampling inspection test
Standard value
Complete set of shielding suit
≥343
≥294
7.2.1 According to Characteristics of shielding clothing. When producing fabrics, the following routine tests should be carried out by sampling regularly: a) Shielding efficiency test; b) Clothing resistance test: c) Clothing fusing current test: d) Flame resistance test; e) Abrasion resistance test: f) Breaking strength and elongation test, g) Clothing thickness test: h) Unit area weight test: i) Air permeability test. 7.2.2 The finished clothing should be checked piece by piece for appearance, shunt connection wires and connectors. They must be ensured to be intact, and the resistance of the whole set of clothing should be tested according to 4 and 4 of GB6568.2-2000. 7.2.3 Before the clothing products leave the factory, they must be inspected according to the requirements of "*Inspection Regulations" in FZ/T81007 and GB/T2662. 7.2.4 The manufacturer must ensure the stability of the manufactured products and the consistency of the delivered products with the type test samples. In addition to providing the buyer with the results of the sampling test, the manufacturer can also provide the buyer with the inspection results of the materials and production process. 7.3 Acceptance test
The acceptance inspection must be carried out at the discretion of the buyer with the participation of the buyer's representative. The acceptance test can be carried out during the production process using the manufacturer's equipment or in a laboratory. When there is a conflict in the test results, representatives from all parties can be invited to conduct the test together. 7.3.1 Basic inspection
Based on the plan selected by the buyer, the following inspections shall be carried out on all or part of any batch of shielding clothing products: a) Appearance inspection,
b) Electrical test: Measure the resistance between any two points of the shielding clothing. 7.3.2 Additional tests
If the buyer requires, sampling inspection can be carried out on the batch of shielding clothing delivered, and all or part of the tests described in Chapter 3 of GB6568.2 can be repeated. Supplementary tests not specified in this standard can also be carried out after consultation between the two parties. 79
8 Modification
GB6568.1--2000
Manufacturers shall obtain the consent of the buyer in advance when making any changes to the characteristics of the shielding suit (regardless of whether these characteristics are specified in this standard or not). After any modification to the shielding suit, the type test must be repeated, and the type standard must be changed and the new standard sample must be stored. If only a partial type test can verify its performance, only a partial type test can be carried out. 9 Marking and packaging
9.1 Marking
Shielding suits must be marked with obvious and permanent markings. The markings shall include the following: 1) Manufacturer's name or trademark; 2) Model name: 3) Year and month of manufacture; 4) Fuse current; 5) Model mark. The above contents shall be displayed with a blue triangle mark. The triangular mark must be firmly installed on the top, pants, hat, gloves, socks and other parts of the shielding suit (see Figure 1). The size parameters of the triangular mark (see Figure 2) are: a) a dark blue triangular frame is hung on the outside, and the width of the frame is 3mm; b) a light blue triangle is inside; c) the length of the outermost side of the triangle is 50mm. 2
Manufacturer name or trademark
1Connector?2-~Shunt connection line3-Mark, 4-Conductive shoes Figure 1 Shielding suit assembly
Note: The triangle and all words are dark, and the background color is light blue. Figure 2 Mark
GB6568.1--2000
When individual parts of the shielding suit (such as gloves, socks, etc.) are not suitable for this size, the size of the mark can be appropriately reduced. The packaging or packaging box of the shielding suit should have anti-pressure, fragile, moisture-proof and other marks. 9.2 Packaging
Since the conductive material in the conductive fabric will be oxidized in the surrounding air, the shielding suit must be packaged so that it will not be oxidized after long-term storage. For example, the shielding suit can be packaged in a plastic bag lined with silk cloth. The function of this layer of silk cloth is to separate the shielding suit from the plastic bag to prevent them from sticking to each other. It can also be packaged in a special box. When packing the whole box, a hard box should be used to prevent the shielding suit from being damaged by the conductive material due to long-term pressure during transportation. The packing bag or box must be accompanied by the product packing list and certificate of conformity. 81
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