1 Scope
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 low current grounding systems of 66kV and below
2 Normative References
The following documents 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 documentGB/T 191-2008 Graphical Symbols for Packaging, Storage and Transport (MOD ISO 780:1997)
GB/T 2423.1-2008 Environmental Testing of Electrical and Electronic Products - Part 2: Test Methods: Test A: Low Temperature (IDT IEC60068-2-1:2007)
GB/T 2423.2-2008 Environmental Testing of Electrical and Electronic Products - Part 2: Test Methods, Test B: High Temperature (IDT IEC60068-2-2:2007)
GB/T2423.3-2006 Environmental Testing for Electrical and Electronic Products - Part 2: Test Methods, Tests 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 of Measuring Relays and Protection Devices Part 1: Vibration Testing (Sine) (IDT IEC)
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific, fair, and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsBaijian and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered, meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
4. Free initial testing, with no testing fees charged
5. Self service order delivery for free on-site sampling
6. Short cycle, low cost, and attentive service 7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc 8. The testing report is authoritative and effective, and is generally used in China