This standard is formulated to actively adopt international standards for the research, development, and application of thyristor modules. The technical requirements and parameter indicators of this standard adopt the general level of foreign company products, and leave appropriate margin for enterprise standards. The basic standard used in this standard is the standard referenced in Chapter 2 of this standard, which is converted into a Chinese standard based on the principle of technical equivalence or reference to the IEC TC47 basic standard. The setting of the inspection items in this standard is based on the performance requirements of the thyristor module, referring to the national standard GB4940 "Ordinary Thyristors", and some additions and deletions have been made. The testing methods used in this standard are in accordance with GB 4024, except for the testing methods specified in the industry standard JB/T 7625.2 "Testing Methods for Thyristor Modules, Arm Pairs and Reverse Parallel Arm Pairs"
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