This standard specifies the classification, technical requirements, test methods, inspection rules, marking, and packaging of shielding clothing for live working. This standard applies to the shielding clothing worn by operators when conducting live work on electrical equipment with voltage levels of 110 (66) kV~750 kV AC, 500 kV DC, and below. The complete set of shielding clothing includes tops, pants, gloves, socks, shoes, and masks. 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 2662 Cotton Clothing GB/T 2668 Unisex Clothing Set Specifications GB/T 14286: Terminology for Live Working Tools and Equipment (GB/T 14286-2008, IEC 60743:2001, MOD) GB/T 16927.1 High Voltage Test Techniques, Part 1: General Test Requirements (GB/T 16927.1-1997, eqv IEC 60060-1:1989) IEC 60456 Methods for Measuring the Performance of Household Washing Machines 3 Terminology and Definitions, except for those specified in GB/T 14286, The following terms and definitions apply to this standard. 3.1 Shunt conductive wire is a metal flexible wire placed at the seams of clothing, pants, socks, hats, gloves, etc., which can bear the main current path in the clothing and ensure good electrical connection. 3.2 Equipotential Bonding Jumper When conducting equipotential operations, the shielding clothing is connected to a high-voltage charged body to form an equipotential connecting wire. The end of this line is equipped with a connecting clamp. 3.3 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 (Uet) on the receiving electrode without shielding to the voltage (U) on the receiving electrode after shielding, expressed in decibels, i.e. SE=20 lg ('u). 3.4 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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