Technical specification of electric insulating boots (shoes)
The so-called insulation means that the charged body is sealed with an insulating material, thereby isolating the charged body or the conductor of different potentials, so that the current can flow in a certain path. Good insulation is a necessary condition to ensure the normal operation of equipment and lines, and is also an important measure to prevent electric shock accidents. Insulation often plays other roles: heat dissipation, mechanical support and fixation, energy storage, arc extinguishing, moisture protection, mildew resistance, and protection of conductors.
This standard is a Chinese standard. It is a national standard plan revised by the State Bureau of Quality and Technical Supervision in 1996. It is issued by the State Economic and Trade Commission Safety Production Bureau and the National Labor Protection Products Standardization Technical Committee in April 1999 on GB12011-1989 "insulated shoes. 》, GB12015-1989 "Low-voltage insulating rubber shoes" and GB12016-1989 "insulated shoes (boots) insulation performance test methods" three standards to be revised to draft the task.
In the drafting process, this standard refers to ISO/DIS 8782:1994 "Safety Protective Footwear Requirements and Test Methods", ANSI Z41.4-1982 "Electrical Damage Shoes" and FOCT 13385-1984 "Electrical Insulation Work Made of Polymer Materials" Technical specifications for shoes.
The revised standard consists of eight chapters, two standard appendices and one hint appendix. There have been major changes in the layout and technical content. Especially in terms of its electrical performance requirements, the original leakage current increased from 0.5 mA/kV to 0.3 mA/kV (insulated footwear and insulated fabric footwear) and 0.4 mA (insulated rubber boots), the maximum leakage The current must not exceed 10 mA. This increases the security probability from the original 50% to 99.5%. In terms of electrical performance test methods, the wet test in GBl2061-1989 was abolished, the dry test was retained, and the 1% sodium chloride solution test method (Appendix B of the standard) was added, which is in accordance with the American standard ANSI Z41.4. - 1983 is consistent.
This standard replaces GBl2011-1989, GBl2015-1989 and GB/T12016-1989 from the date of implementation. Any industry standard that is inconsistent with this standard and is lower than the requirements of this standard shall be abolished by itself.
This standard was proposed by the Safety Production Bureau of the State Economic and Trade Commission.
This standard was formulated by the National Technical Committee for Labor Protection Products Standardization.
This standard was drafted: Tianjin Shuangan Protective Equipment Co., Ltd., Beijing Leather Products Factory, Shanghai Shuangqian Shoes Industry No. 1 Factory, Tianjin Honglian Rubber Factory, Tianjin Jinzhao Welfare Rubber Factory.
The main drafters of this standard: Qi Qiyuan, Zhang Zhongjun, Li Qinhua, Xu Wensheng, Wang Huaiqing, Cui Guozhong, Shen Runyi.
1 Scope
This standard specifies the classification, style, technical requirements, inspection methods, inspection rules, marking, packaging, storage, transportation and use of electrical insulating shoes.
This standard applies to electrically insulated shoes that serve as an auxiliary safety tool when working on electrical equipment.
This standard does not apply to insulated shoes made by a single seam process.
2 Reference standard
The provisions contained in the following standards constitute provisions of this standard by reference in this standard. At the time of publication, the editions indicated were valid. All standards will be revised and parties using this standard should explore the possibility of using the latest version of the following standards.
CB/T528-1998 Determination of tensile stress-strain properties of vulcanized rubber or thermoplastic rubber
GB/T532-1997 Determination of bond strength between vulcanized rubber or thermoplastic rubber and fabrics
GB/T1040-1992 Test method for tensile properties of plastics
GB/T1689-1998 Determination of wear resistance of vulcanized rubber (using Acrony abrasion machine)
GB/T3293.1-1998 shoe size
GB/T3903.1-1994 General inspection methods for footwear
GB/T3903.2-1994 General inspection methods for footwear
GB/T3903.3-1994 General inspection methods for footwear - Peel strength test method
GB/T3903.5-1995 General inspection methods for footwear
Textiles - Textiles - Tensile properties - Part 1 - Determination of breaking strength and elongation at break
GB/q9341-1988 Test method for bending properties of plastics
DL08-1991 Electrical Safety Work Regulations (Electrical Section of Power Plants and Substations)
DL409-1991 Electrical Safety Work Regulations (Power Line Section)
HG2401-1992 Mining Boots
HG/T2495-1993 Labor boots
QB1002-1997 Adhesive shoes
QB/T1003-1990 vulcanized leather shoes
QB/f1005-1990 molded shoes
QB/T3812.4-1999 Leather Physical property test Thickness measurement
QB/T3812.5-1999 Determination of tensile strength and elongation of leather
QB/T3812.6-1999 Leather Determination of tearing force
3 Product classification and variety style
3.1 Classification
According to the help materials, they are classified as follows:
a) electric insulation footwear;
b) electrical insulation cloth rubber footwear;
c) electric insulating rubber surface rubber footwear;
d) Electrically insulated plastic footwear.
3.2 style
According to the level of the help, it is divided into the following styles:
a) low-voltage insulated shoes;
b) high waist electrically insulated shoes;
c) half-tube electric insulated boots;
d) High-barreled insulated boots.
4 Technical requirements
4.1 General requirements
4.1.1 Structure
There should be no metal hooks and other parts on the sole and heel. The anti-smashing type of insulated inner insole is made of metal material and should be surface-insulated, and it cannot be moved in conjunction with the shoe when making shoes. The bottom joint should not be threaded with upper and lower threading and can be seamed sideways.
4.1.2 shoe size
The shoe size setting should meet the requirements of GB/T3293.1.
4.1.3 uppers
4.1.3.1 Upper dimensions Dimensions (h) shall meet the minimum requirements of Table 1.
Insulated shoes are a kind of safety shoes made of insulating materials. The applicable range of electric insulation shoes, the new standard clearly points out: electric insulation shoes and cloth surface insulation shoes with the test voltage less than 15KV, applied in the working environment of power frequency (50-60F) below 1000V, test electric power above 15KV The city's electric insulation rubber shoes are suitable for working environment above 1000V.