This standard specifies the product classification, technical requirements, inspection methods, inspection rules, marking, packaging, transportation, storage, and other requirements for time relays. This standard applies to time relays (hereinafter referred to as relays) with a single input excitation quantity used in power system relay protection or automatic control circuits, as the basis for design, production, and use. This standard is only applicable to new relays. The following standards contain provisions that, through reference in this standard, constitute provisions of this standard. At the time of publication of the standard, all versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T 2900.1-92 Basic Terminology of Electrical Terminology (neq 1EC 50> GB/T 2900.17-94 Electrical Terminology Electrical Relays GB/T 6162-85 Electrical Interference Testing for Static Relays and Protection Devices (neq IEC525-4-1976) GB/T 7261-87 Basic Test Methods for Relays and Relay Protection Devices GB/T 14598.9-1995 Electrical Relays Part 2 Electrical Interference Testing for Measuring Relays and Protection Devices Part 3 Radiated Electromagnetic Field Interference Testing (idt IEC255-20-1984) JB/T 7102-1993 Degrees of Protection for Relays and Their Devices (IF Mark> JB/T 7828-1995 Technical Conditions for Packaging, Storage and Transport of Relays and Their Devices ZB K45 020-90 General Technical Conditions for Protection, Automatic Relays and Devices in Power Systems ZB K45 032-90 Measurement Relays and Protection Devices Electrostatic Discharge Interference Test
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