Scope
This standard specifies the technical requirements, test methods, inspection rules, markings, labels, user manuals, packaging, transportation, storage, etc. for the variable pitch system of grid connected wind turbines This standard is applicable to variable pitch systems used in grid connected horizontal axis (three blade wind turbine) wind turbines. The driving methods for variable pitch are hydraulic or electric 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 Symbols
GB/T 1029 Test Methods for Three Phase Synchronous Motors GB/T 1032 Test Methods for Three Phase Asynchronous Motors GB/T 1311 Test Methods for Direct Current Motors
GB/T 2422 Guidelines for Writing Environmental Testing Test Methods Terms and Definitions
GB/T 2423.1-2008 Environmental Testing for Electrical and Electronic Products Part 2; Test Method Test A: Low Temperature 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