This standard specifies the basic technical requirements, technical parameters, test methods, and inspection rules for arc protection devices. This standard applies to arc protection devices and their related equipment (hereinafter referred to as devices) as the basis for product development, design, manufacturing, testing, and operation. The following normative references are essential for the application of this document. For all cited documents with issue 8, only the dated version applies to this document. For undated references, the latest version (including all modification orders) applies to this document. GB/T 2900.1 Electrical Terminology Basic Terminology GB/T 2900.17 Electrical Terminology Measurement Relay: GB/T 2900.49 Electrical Terminology Power System Protection GB/T 7261-2008 Basic Test Methods for Relay Protection and Safety Automatic Devices GB/T 11287-2000 Electrical Relays Part 21: Measurement Relay and Protection Device Vibration, Shock Collision and Seismic Testing Part 1: Vibration Testing (Sine) GB/T 19582.1-2008 Industrial Automation Network Specification Based on Modbus Protocol Part 1: Modbus Application Protocol DL/T478-2013 General Technical Conditions for Relay Protection and Safety Automatic Devices DL/T667 Telecontrol Equipment and Systems Part 5: Transmission Protocol Part 103: Information Interface Supporting Standards for Relay Protection Equipment DL/T 860 Substation Communication Network and Systems (All Parts) The terms and definitions defined in GB/T 2900.1, GB/T 2900.17, and GB/T 2900.49, as well as the following terms and definitions, apply to this document. 3.1 Arc protection equipment is a fast protection equipment that uses the arc light signal generated during power equipment faults as the main criterion, and other fault quantities such as current as auxiliary criteria to quickly cut off the protection device of the corresponding faulty equipment. 3.2 Arc light sensor is a sensor that senses the intensity of arc light
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