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What happens when using a 240 volt fuses on a 480 volt 3-phase system?
Wiki User
∙ 13y ago
The voltage rating of a fuse has to do with how long the fuse is / how much dielectric strength exists between the two terminals that don't melt. If you use a fuse that is rated for too low of a voltage, it will likely melt for a fault condition, but the voltage is too high for the gap distance, so an arc will develop across the (open) fuse. So...the fuse does no good. It will not protect equipment if used at a higher voltage than it is rated.
Wiki User
∙ 13y ago
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