Inspection of the hottest intrinsically safe elect

2022-10-03
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Inspection of intrinsically safe electrical equipment

I. In addition to the provisions of the inspection procedure, the review of technical documents must also meet the following requirements when these innovative materials are used in vehicle components: 1. There should be few intrinsically safe circuits and safety performance calculations; 2. Insulation dielectric strength test report; 3. The circuit schematic diagram should be marked with the words "intrinsically safe circuit", "non intrinsically safe circuit", "associated circuit", "reliability component" and "protective element", and these circuits are framed by dotted lines. 2、 Structural inspection structural inspection intrinsically safe circuits and electrical equipment and gb3836 Electrical equipment for explosive gas atmospheres Part 1: General requirements. 3、 Test method 1. Test gas the concentration (volume ratio) of the mixture of test gas and air under normal pressure is: Ⅰ: 8.3 ± 0.3% methane; IIA: 5.3 ± 0.2% propane; Improve the support capacity of new materials throughout Ⅱ B: 7.8 ± 0.5% ethylene; IIC: 21 ± 2% hydrogen. For the electrical equipment used in the environment with specific explosive mixture, which usually allows the equipment to maintain a good texture compound (such as only one or a special explosive mixture), the concentration of the mixture that is most easily ignited shall be used for the test. 2. Spark test device. The sensitivity of spark test device shall be calibrated before and after each test. The parameters of sensitivity are selected in the following table

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