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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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    does it trip while running, or just at start up ? How much current flows in the CPC when it is running ?

    Ii is likely that the VSD is designed with RF interference filters (well it should be if it is CE marked) and these will include capacitance from L-E as well as N-E. This leads to s standing current imbalance even when nothing is wrong.
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  • 0
    does it trip while running, or just at start up ? How much current flows in the CPC when it is running ?

    Ii is likely that the VSD is designed with RF interference filters (well it should be if it is CE marked) and these will include capacitance from L-E as well as N-E. This leads to s standing current imbalance even when nothing is wrong.
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