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If the PCB is sealed with solid sealant, how to determine the creepage distance and clearance?

functional insulation as well as other insulation exists on circuit boards. Typically, the surface environment of a circuit board is determined to be either Pollution degree 3 or pollution degree 2.If the circuit board is mounted in an electrical box and sealed with a solid sealant, the sealing will look as follows: What should be…

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A question about functional insulation requirements at the ends of a current fuse

The following circuit diagram The current fuse in position F1 is usually connected in series with the line.The photos of the real thing are shown in the following two pictures, the left one is not labeled, the right one shows the location of the current fuse and some other basic information. In the diagram above,…

IEC 60335-1의 표 17 및 표 18

표 17과 표 18에는 “작동 전압 및 gt; 10V 및 ≤ 630V의 경우 전압이 표에 지정되지 않은 경우 연면 거리 값은 보간법으로 찾을 수 있습니다.”라는 메모가 있습니다. 작동 전압이 표에 나열된 값이 아닌 경우 일반적으로 한계값을 얻기 위해 계산해야 합니다. 편의상 엑셀 표를 준비했습니다. 테스터는 해당 표에 직접 쿼리하여 해당 한계값을 얻을 수 있습니다. 다운로드