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UTS10BI fuse behavior | Universal Transfer Switch

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UTS10BI fuse behavior

Discussion in Universal Transfer Switch started by Robert , 12/6/2019 3:24 PM
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UTS10BI fuse behavior

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  • moran

    What I'm reporting may be already known to the more knowledgeable members of this forum but it was news to me. I experienced a simple short in a bedroom wall circuit that seemed to trip a circuit breaker in the regular panel. However no breaker was tripped yet the outlets in that room were all dead. I didn't even think to look at the UTS 10BI as I thought it's protective behavior was only when my generator was the power source. However, as I learned from a licensed electrician, the fuses on that circuit in the UTS  open faster than the breakers can and it was the replacement of that fuse that returned service to that room. So as a rule, at least for me, when I experience a current loss due to a short I'll check the UTS first.

  • dferrero

    Yes, the glass fuse will likely blow before a slower circuit breaker trips. To test your glass fuse, put your multi-meter into continuity mode or resistance and measure. It should have near zero resistance if the fuse is still good. If it is blown, the resistance is basically infinite.

    Two other things to check in the UTS config. Ensure the UTS fuse is equal to the breaker (15A = 15A). Ensure the UTS is configured for the fuse used. In other words, if you use a 20A glass fuse in the UTS, ensure that circuit is configured for that 20A fuse.

     

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