This standard specifies the technical requirements, test methods, inspection rules, markings, labels, user manuals, packaging, transportation, storage, etc. of electric pitch control systems for grid connected onshore wind turbines. This standard is applicable to electric variable pitch systems for grid connected onshore (ground) wind turbines, serving as the basis for design, manufacturing, testing, and certification. 2 Normative References: The clauses in the following documents become clauses of this standard through reference in this standard. For dated reference documents, all subsequent amendments (excluding corrected content) or revisions are not applicable to this standard. However, parties to agreements based on this standard are encouraged to study whether the latest versions of these documents can be used. For undated references, the latest version applies to this standard. GB/T 191 Packaging, Storage and Transport Graphical Symbols GB 755-2008 Rotating Electrical Machines - Rating and Performance GB/T2422 Environmental Testing Terminology for Electrical and Electronic Products (GB/T2422-1995, neq IEC 60068-5-2:1990) GB/T 2423.1-2008 Environmental Testing for Electrical and Electronic Products - Part 2: Test Methods - Test A: Low Temperature (idt IEC60068-2-1:2007) GB/T 2423.2-2008 Environmental Testing for Electrical and Electronic Products - Part 2: Test Methods - Test B: High Temperature (id IEC60068-2-2:2007) GB/T 2423.3-2006 Environmental Testing for Electrical and Electronic Products - Part 2: Test Methods - Test Cab: Constant Damp Heat Test (IEC 60068-2-78:2001, IDT) - GB/T 2423.4-2008 Basic Environmental Testing Procedures for Electrical and Electronic Products - Test Db: Alternating Damp Heat Test Method (eqv IEC60068-2-30: 1980) GB/T 2887-2000 General Specification for Electronic Computer Sites GB/T 2900.1 Basic Terminology of Electrical Terminology GB/T 2900.53 Electrical Terminology Wind Turbine Generators GB/T 3797-2005 Electrical Control Equipment GB/T 3859.1-1993 Semiconductor Converters
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