We did not change the connections on the VFD, we assumed as the low current heading down the well that the issue was with the drop cables/motor or join.
New pump/motor and cable - existing vsd. we have no way of knowing if there was an issue with the old pump in terms of imbalance as the old paperwork from comission only noted drive amps as average of three phases.
We have a 130kw submersible pump on a VSD that is showing nearly 9% currant imbalance. It also shows induced current on the earth rising from the motor.
The pump is 100m deep and the riser pipe is 8 inch and the well casing is 12 inch. Pump is 12 inch.
95 mm2 cable is run down to the 6 wire...
