1.1kw compressor motor blowing fuses....
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  1. #1
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    cresta pa is offline

    1.1kw compressor motor blowing fuses....

    Picked up a Hydrovane with a single phase motor, when cold its fires right up, but stop it & try restart it the fuse blows, you can see the fan on the end jiggle about before the fuse blows.

    The run capacitor and wires looks good, Im quessing the windings are breaking down when warm. what do you think? thanks

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    1.1Kw is just over the limit for a 13 amp plug. It could be that you need a 16 amp socket and plug (no fuse in those) or it could be the start capacitor not doing its job, or it could be the air release valve not working on start up.
    If it's got tits or tyres, its gonna be trouble

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    Sorry early morning!!!! 1.1Kw shouldn't overload a 13amp fuse so it must be one of the other 2 !!!
    If it's got tits or tyres, its gonna be trouble

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    cresta pa is offline
    Its not the air release valve, the cap looks very good, Ill try another...thanks

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    Its not the cap either, the wiring must be shorting out

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    AustinHarley is offline
    Is it on a long extension lead or a poor supply? Sufficient volt drop might mean the compressor drawing more current. When cylinder is pressurised the motor will draw a lot more as it's pumping against that high pressure.
    Assuming you're using a 13A fuse? Could try a slow-blow fuse instead.

    I also saw something about unloader valves (I guess that's the air release valve you mentioned?)
    see http://theworkshopcompressor.com/lea...ssor-unloader/
    Last edited by AustinHarley; 01-09-2020 at 09:34.

  9. #7
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    1.1 Kw is only 4 amps ish. It will take a lot more to start than that though which is the job of the capacitor to give it more start power. I'd still go for that.
    If it's got tits or tyres, its gonna be trouble

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    cresta pa is offline
    treid another bigger cap, its not that.The motor is knacked..thanks

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