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The purpose of organizing type tests is to demonstrate the ability and ensure the accuracy of the rated characteristics of circuit breakers.
. This type of testing is conducted in a specially built testing laboratory
1. Mechanical testing - This is a type of mechanical capability test involving repeated opening and closing of circuit breakers. The circuit breaker must close and open at an appropriate speed and complete its assigned work and functions without any faults
2. Thermal testing - Conduct a thermal test to check the thermal behavior of the circuit breaker. Due to the rated current flowing through its poles under rated conditions, the tested circuit breaker undergoes a steady-state temperature rise. The temperature rise of the rated current is less than 800A, and the normal current does not exceed 40 °. The temperature rise of the normal current of 800A and above does not exceed 50 °
3. Dielectric tests - Perform these tests to check the power frequency and impulse voltage withstand ability. Perform power frequency testing on the new circuit breaker; The test voltage varies with the rated voltage of the circuit breaker. In the impulse test, the circuit breaker adopts a specific value of impulse voltage. Conduct dry and wet tests on outdoor circuits
4. Short circuit test - Sudden short circuit of a circuit breaker in a short circuit testing laboratory, and understand the behavior of the circuit breaker during closing, during contact opening, and after arc extinguishing through waveform diagrams. The study of waveform diagrams specifically refers to making and breaking currents, symmetric and asymmetric re triggering voltages, and switchgear is sometimes tested under rated conditions
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