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Portable HPU Panel overload protection query

Former Community Member
Former Community Member
Hi all, newbie so be gentle :)


Our company has portable 415V hydraulic power units from 7.5 to 18.5kW.


On all control panels there is no short circuit device (MCCB or MCB) only a thermal overload and on nearly half, no isolator. Is this standard for this type of unit? These unit are plugged in to site 415 distribution panels which, I assume, will have generic (at a guess) 32A and 63A outlets. It goes against everything I ever did as a panel wireman.


Any words of wisdom, as I'm being asked to make a new panel for o ne of the units and not sure I'm happy with this setup.


Cheers,


G
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    I'm not sure I have the picture, having not see one before .. Are these things in effect jumbo plug in appliances, that are relying on the protection of the socket they plug into?,

    or is it more complex,

    also  does the thermal overload device protect the whole thing, and how does that compare say with the wiring size used.?

    Does it need any kind of emergency stop, or is that handled by whatever gets fed by the hydraulic hoses.


    If so it may be all right, it may not - it rather sounds like it depends what plug gets put on it, whcih is not so great, but also part of me is thinking is this equipment that is  covered by the 'machinery directive, and all that entails !

    Mike
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  • 0
    I'm not sure I have the picture, having not see one before .. Are these things in effect jumbo plug in appliances, that are relying on the protection of the socket they plug into?,

    or is it more complex,

    also  does the thermal overload device protect the whole thing, and how does that compare say with the wiring size used.?

    Does it need any kind of emergency stop, or is that handled by whatever gets fed by the hydraulic hoses.


    If so it may be all right, it may not - it rather sounds like it depends what plug gets put on it, whcih is not so great, but also part of me is thinking is this equipment that is  covered by the 'machinery directive, and all that entails !

    Mike
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