This standard specifies the terms and definitions, technical requirements, safety requirements, test methods, inspection rules, and requirements for marking, packaging, transportation, and storage of single-phase grounding fault line selection devices in small current grounding systems. This standard is applicable to the design, manufacturing, inspection, and application of single-phase grounding fault line selection devices (hereinafter referred to as devices) for 66kV and below small current grounding systems. 2 Normative reference documents The following documents are essential for the application of this document. For dated reference documents, only the dated version applies to this document. For undated reference documents, the latest version (including all modification orders) Applicable to this document. GB/T 191-2008 Packaging, Storage, and Transport Pictorial Symbols (MOD ISO 780:1997) GB/T 2423.1-2008 Environmental Testing for Electrical and Electronic Products - Part 2: Test Methods, Test A: Low Temperature (IDT IEC60068-2-1:2007) GB/T 2423.2-2008 Environmental Testing for Electrical and Electronic Products - Part 2: Test Methods, Test B: High Temperature (IDT IEC60068-2-2:2007) GB/T 2423.3-2006 Environmental Testing for Electrical and Electronic Products - Part 2: Test Method - Test Cab: Constant Damp Heat Test (IDT IEC 60068-2-78:2001) GB/T 2887-2011 General Specification for Computer Sites GB/T 7261-2016 Basic Test Methods for Relay Protection and Safety Automatic Devices GB/T 9361-2011 Safety Requirements for Computer Sites GB/T 11287-2000 Electrical Relays, Part 21: Vibration, Shock Collision and seismic testing - Part 1: Vibration testing (sinusoidal) (IDT IEC 255-21:1988) GB/T 14537-1993 Impact and collision testing for measuring relays and protective devices (IEC 255-21-2) GB 14598.27-2008 Measuring relays and protective devices - Part 27: Product safety requirements (IEC 60255-27:2005, MOD) DL/T 478-2013 General Technical Conditions for Relay Protection and Safety Automatic Devices DL/T 620-1997 Overvoltage Protection and Insulation Coordination for AC Electrical Installations DL/T 667-1999 Telecontrol Equipment and Systems, Part 5: Transmission Protocol Part 103: Information Interface Matching Standards for Relay Protection Equipment (IDT IEC 60870-5-103:1997) DL860 (All Parts) Standard DL/T 995-2006 for Substation Communication Network and System Series - Inspection Regulations for Relay Protection and Power Grid Safety Automatic Devices
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