1 Scope
This standard specifies the terms and definitions, product models, usage conditions, performance parameters, technical requirements, test items and methods, marking, packaging, transportation, storage, and product documents of oil level temperature controllers for transformers.
This standard is applicable to the design, manufacturing, and testing of oil surface temperature controllers (hereinafter referred to as temperature controllers) used in oil immersed transformer products
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 document GB/T 191 Packaging, Storage and Transportation Pictorial SymbolsGB 1094.1 Power Transformers Part 1: General GB 4208 Degrees of Protection Provided by Enclosures (IP Code>
GB/T 13384 General Technical Conditions for Packaging of Mechanical and Electrical Products GB/T 13983 Basic Terminology of Instruments and Meters
GB/T 25475 Industrial Automation Instrument Terminology Temperature Instruments
GB/T 25480 Basic Environmental Conditions and Test Methods for Transportation and Storage of Instruments and Meters
GB/T 28473.1 Temperature Transmitters for Industrial Process Measurement and Control Systems, Part 1: General Technical Conditions GB/T
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