This standard specifies the terms and definitions, performance parameters, technical requirements, inspection rules and methods, marking, packaging, transportation, and storage of dry type amorphous alloy core distribution transformers. This standard is applicable to three-phase dry amorphous alloy iron core non excitation voltage regulating distribution transformers (hereinafter referred to as "transformers") with nominal system voltages of 6kV, 10kV, 20kV, and 35kV, rated frequency of 50 Hz, rated capacity of 30 kVA~2500 kVA, and indoor use. Other products with rated capacity can refer to the use of this standard. This standard does not apply to gas-filled transformers. The following normative references 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 Symbols GB/T 1094.1 Power Transformers Part 1: General GB/T 1094.10 Power Transformers Part 10: Sound Level Determination GB/T 1094.11 Power Transformers Part 11: Dry type Transformers GB/T 1094.12 Power Transformers Part 12: Load Guidelines for Dry type Power Transformers GB/T 2828.1 Sampling Procedures for Inspection by Attributes GB/T 2900.95 Electrotechnical Terminology Transformers Voltage Regulators and Reactors GB/T 5273 Standardization of Terminal Dimensions for High Voltage Electrical Appliances GB/T 5465.2 Graphical Symbols for Electrical Equipment Part 2: Graphical Symbols JB/T 501 Test Guidelines for Power Transformers 3 Terms and Definitions GB/T 1094.1, GB/T 1094.11, and GB/T 2900.95, as well as the following terms and definitions, apply to this document. 3.1 Amorphous alloy is an alloy that uses elements such as iron, silicon, boron, carbon, and cobalt as raw materials, and uses special processes such as rapid cooling to make the internal atoms appear disordered. 3.2 Amorphous alloy core is a transformer core made of amorphous alloy strips with soft magnetic properties. 3.3 Dry type amorphous alloy core distribution transformer is a dry type distribution transformer made of amorphous alloy core as magnetic material
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