This standard specifies the work system, technical requirements, operation methods, tools and equipment, operation essentials, and safety measures for bypass operation of distribution lines with voltage levels of 10 kV to 20 kV. This standard is applicable to the maintenance and repair of distribution line equipment for 10 kV -20 kV voltage level bypass operations. The following normative references are essential for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest version (including all modification orders) applies to this document. GB/T 2900.55 Electrotechnical Terminology Live Working GB/T 14286 Live Working Tools and Equipment Terminology GB/T 16471 Transport Packaging Dimensions and Quality Limits DL/T 974 Tool Warehouse for Live Working 3 Terms and Definitions GB/T 2900.55 and GB/T14286, as well as the following terms and definitions, apply to this document. 3.1 Bypass work: By connecting the bypass equipment, the load in the distribution line is transferred to the bypass system, achieving a power outage maintenance mode for the equipment to be repaired. Note: There are two methods: live working and power outage working. 3.2 Bypass flexible cable is a single core power cable with a conductor composed of multiple strands of flexible copper wire that can be repeatedly bent and used. 3.3 Bypass cable connector is a device used to connect and connect bypass flexible cables. Note: This includes quick plug-in bypass cable connectors and detachable bypass cable terminals. 3.4 Bypass load switch is a movable three-phase switch used indoors or outdoors, with two states of opening and closing, used for switching load current during bypass operations
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