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Essential knowledge: requirements and standards for needle flame testing

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Essential knowledge: requirements and standards for needle flame testing

Author: Date :2023-11-28 Views: order

The needle flame testing is a safety test method for electrical equipment to evaluate the flame retardancy of the equipment. The test is based on international standards IEC60695-11-5, GB/T5169.5-2017 and UL746A, etc. The test should usually meet the following requirements and standards:

1. the test equipment shall meet the requirements of the standards, including test clearance, test conditions, etc.

2. the test temperature shall be between 750°C and 1200°C, but shall not exceed the temperature resistance of insulating materials, thermosetting plastic materials, and metal components

3. the test time varies for each type of equipment, but shall meet the time requirements specified in the standard. Typically, the test time is 30 seconds for electronic devices and 60 seconds for wire and cable materials.

4. During the test, no burning dripping phenomenon can occur during the burning process. At the same time, the equipment shall be free of damage at the end of the test and the insulation shall be unaffected.

5. all tests shall be conducted in a reliable and safe environment to ensure the safety of the testers.

The following aspects should be noted when performing NEEDLE FLAME TESTING:

1. test operation: should refer to the specific international or national standard operating procedures, including the required test equipment, test methods, test conditions and recording methods.

2. Test material: the selected material shall comply with the test provisions required in the specification or standard. Before the test, the material should be safety approval and type testing to ensure that the selected material is suitable for testing.

3. Test environment: the high temperature, sparks and combustibles generated in the needle flame test can lead to safety hazards, therefore, the test environment must be adequately assessed before the test and protective measures.

4. Test results: after the needle flame test, should produce a detailed record of the flame or combustion droplets, and reliable data analysis and evaluation.

Overall, needle flame testing is a very important safety test method, which plays an important role in ensuring the safety performance of electrical equipment. When conducting needle flame testing, suitable test methods and instruments should be selected, and organized and planned tests should be carried out in accordance with the requirements of the relevant standards to ensure the accuracy and reliability of the test results.

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