The headlights of various locomotive and vehicle audio-visual warning devices used in railway mainline locomotives, shunting locomotives, and multiple units are required to provide third-party qualified testing reports or supporting documents before being put into market use. The type test content of locomotive and vehicle headlights includes: 1. Impact and vibration resistance: Headlamps should be able to withstand functional vibration, long life vibration, and mechanical impact tests as specified in GB/T21563-2018, Class 1, Class B. After the test, the components should not be damaged, and the headlamp should be able to operate normally. 2. Insulation resistance measurement: Under normal atmospheric conditions, when using DC500V, the insulation resistance between live parts and metal shells should be ≥ 10M Ω. 3. Dielectric strength test: For DC110V powered headlights, they should be able to withstand the AC1500V sinusoidal AC voltage test for 1 minute without breakdown or arcing. 4. Polarity reversal: There should be a power back protection function, and when the polarity of the power input is reversed, the components should not be damaged. 5. Electromagnetic compatibility testing: Comply with the GB/T24338.4-2018 standard for conducted emissions, radiated emissions, electrostatic discharge tests, radiation immunity tests, pulse group tests, surge tests, and radio frequency conduction tests at the power supply end. 6. Low temperature test:- Test the performance after storage at 40 ℃ for 2 hours. 7. High temperature test:+ Store at 70 ℃ for 2 hours and then test the performance. 8. Alternating Damp Heat Test: The temperature range is 25 ℃ -55 ℃, and the insulation resistance and performance are tested after two cycles. 9. Salt Spray Test: Temperature 35 ℃, 5% NACL solution, continuous spray for 48 hours. 10. Durability test:+ 55 ℃, continuously powered on for 168 hours. 11. Protection level test: It should comply with the IP55 protection level requirements in the GB/T4208-2017 standard. Author: Cui Gong, Shenzhen Anche Shenghui Testing Co., Ltd https://www.bilibili.com/read/cv17579387/ Source: Bilibili
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