This standard specifies the technical requirements, test methods, inspection rules, marking, and packaging of shielding clothing for 1000 kV AC live working. This standard applies to the shielding clothing worn by operators when conducting live work on electrical equipment with an AC voltage level of 1000 kV. The complete set of shielding clothing includes jumpsuits, hats, masks, gloves, socks, and shoes. 2 Normative References: The clauses in the following documents become clauses of this standard through reference in this standard. For dated reference documents, all subsequent amendments (excluding corrected content) or revisions are not applicable to this standard. However, parties to agreements based on this standard are encouraged to study whether the latest versions of these documents can be used. For undated references, the latest version applies to this standard. GB/T 1335.1 Clothing Size for Men GB/T 2668 Single and Set Specifications GB/T 6568 Shielding Clothing for Live Working (GB/T 6568-2008, IEC 60895; 2002, MOD) GB/T 14286 Terminology of Live Working Tools and Equipment (GB/T 14286-2008, EC 60743:2001, MOD) GB/T 16927.1 High Voltage Testing Techniques Part 1: General Test Requirements (GB/T 16927.1-1997, cqv IEC 60060-1: 1989) IEC 60456 Household Washing Machines - Performance Measurement Methods 3- Terms and Definitions GB/T 14286 and the following terms and definitions apply to this standard. 3.11 Shielding clothing for 1000kV AC live working is made of conductive materials and textile fibers mixed with fabric to protect equipotential operators from the influence of AC high voltage electric fields. The complete set of shielding clothing for 1000 kV AC live working is a one-piece design, including clothing, hats, masks, gloves, socks, and shoes. 3.2 Screening efficiency is a relative indicator that measures the shielding performance of shielding clothing materials, expressed as SE. The shielding efficiency is the logarithmic value of the ratio of the voltage (U.) on the receiving electrode without shielding to the voltage (U) on the receiving electrode after shielding, expressed in decibels, i.e. SE=20lg (Ui/U). 3.3 Cloth material electrical resistance Cloth material resistance is the DC resistance value within a circular area on the surface of the cloth. The size of this circular area is the difference between the area of a circle with a diameter of 114 mm and the area of a circle with a diameter of 44 mm. This resistance value can reflect the quality of conductive materials and the size of the contact resistance at the intersection of conductive materials. It is an important indicator to measure the conductivity of shielding clothing materials
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