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?

Hi Clive, how is the vsd controlled, as a manually set control or some sensors etc? 


I’m a bit worried where you say “but not earthed which should have stopped it tripping” What do you mean by this?


A clear photo of the RCD and any other items may help for further info.

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?

Hi Clive, how is the vsd controlled, as a manually set control or some sensors etc? 


I’m a bit worried where you say “but not earthed which should have stopped it tripping” What do you mean by this?


A clear photo of the RCD and any other items may help for further info.