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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,…

तालिका 17 और आईईसी 60335-1 की तालिका 18

तालिका 17 और तालिका 18 में एक नोट है “कार्यशील वोल्टेज और जीटी के लिए; 10 वी और ≤ 630 वी, यदि वोल्टेज तालिका में निर्दिष्ट नहीं है, तो क्रीपेज दूरी के मान प्रक्षेप द्वारा पाए जा सकते हैं।” यदि ऑपरेटिंग वोल्टेज तालिका में सूचीबद्ध मूल्य नहीं है, तो हमें आमतौर पर सीमा मूल्य प्राप्त…