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Do-It-Yourself (DIY) Question & Answer Forum
Generator Earth Testing
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<blockquote data-quote="davey345" data-source="post: 484394" data-attributes="member: 15045"><p>So the Ze with earth electrode disconnected is about 7.6 ohms and then zs with it connected, i would expect a similar value to the ze reading, however lets say i have a zs value of say 6 ohms, then surely the pfc = U0/zs = 650v / 6 = 108A which would not be enough to clear trip the MCCB or blow and gen fuses? where am i going wrong please?</p></blockquote><p></p>
[QUOTE="davey345, post: 484394, member: 15045"] So the Ze with earth electrode disconnected is about 7.6 ohms and then zs with it connected, i would expect a similar value to the ze reading, however lets say i have a zs value of say 6 ohms, then surely the pfc = U0/zs = 650v / 6 = 108A which would not be enough to clear trip the MCCB or blow and gen fuses? where am i going wrong please? [/QUOTE]
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