Electronics
Testing of transformers and power supply devices for electric bells and clocks
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Testing of transformers and power supply devices for electric bells and clocks
Scope
This chapter of GB 19212.1-2016 is replaced by the following:
This part of GB 19212 specifies the safety requirements for bell and bell transformers and power supply devices with built-in bell and bell transformers.
. Transformers with electronic circuits are also included in this section Note 1: Safety requirements include electrical, temperature, and mechanical aspects Unless otherwise specified, the following "transformers" include bell and bell transformers, as well as power supply devices with built-in bell and bell transformers This section is applicable to stationary, single-phase, air cooled (self cooled or air cooled), independent or supporting dry type transformers. The winding can be encapsulated or non encapsulated This standard applies to transformers and power supply devices (linear) This section is used in conjunction with GB 19212.17 switch mode power supply devices and is also applicable to internal operating frequencies exceeding 500Function 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