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Swimming pool 3 phase motor trips occasionally on earth leakage RCD

CliveS
We have a new 4 kW 3 phase pump motor at the local pool which has a new variable speed drive unit attached and occasionally it trips out on the RCD which I assume is 30mAmp .  The connections are star inside the motor but not earthed which should have stopped it tripping.

We are not sure what to do, we could run the motor flat out and delta connect the windings possibly or some suggest disconnecting the RCD as the circuit is completely separate from normal wiring.  Would this option contravene any of our regs?
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    CliveS:

     occasionally it trips out on the RCD which I assume is 30mAmp .  

    If it trips every time I would suspect an issue with the selection of RCD, an occasional trip suggests the RCD is doing its job and there’s a fault causing it to trip.


    It could be “hanging on the edge” of tripping, but ripping the RCD out without knowing why it’s tripping is foolhardy.


    Why were the new controls installed to what was presumably an existing pump?


    Andy B.
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  • 0
    CliveS:

     occasionally it trips out on the RCD which I assume is 30mAmp .  

    If it trips every time I would suspect an issue with the selection of RCD, an occasional trip suggests the RCD is doing its job and there’s a fault causing it to trip.


    It could be “hanging on the edge” of tripping, but ripping the RCD out without knowing why it’s tripping is foolhardy.


    Why were the new controls installed to what was presumably an existing pump?


    Andy B.
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