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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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    Hi Adrian 

    The motor is Certikin Hurricane [!E2] model CP4005-M 4cv/3kW IP55, 230/400volt 50Hz 10.8/6.2 amp 3 phase,  2850rpm  6s 0.81.

    The VSD is Invertek Optidrive E3 model ODE 3-240095-3FA ; 380-489 volt 3 phase,50Hz 11.5 amp with output 0-500V,3ph,0-500Hz, 9.5 amp 5HP.

    The instructions do mention a type "B" RCD but as the motor is not self starting after a power outage we would prefer to run the motor without the VSD which would avoid the cost of changing the RCD and the motor would automatically start; if the regs permit.

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  • 0
    Hi Adrian 

    The motor is Certikin Hurricane [!E2] model CP4005-M 4cv/3kW IP55, 230/400volt 50Hz 10.8/6.2 amp 3 phase,  2850rpm  6s 0.81.

    The VSD is Invertek Optidrive E3 model ODE 3-240095-3FA ; 380-489 volt 3 phase,50Hz 11.5 amp with output 0-500V,3ph,0-500Hz, 9.5 amp 5HP.

    The instructions do mention a type "B" RCD but as the motor is not self starting after a power outage we would prefer to run the motor without the VSD which would avoid the cost of changing the RCD and the motor would automatically start; if the regs permit.

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