Patent ID: 9590537
Date: 2017-03-07
CPC Classifications: F04B,G01R,H02H,H02P

Claim:
1. A method of detecting a ground in a water distribution system having a pump coupled to a motor, the motor being driven by a drive located in an enclosure, the method comprising: determining whether a voltage exists at least one of on the enclosure, inside the enclosure, and in proximity to the enclosure, the enclosure at least partially enclosing the drive of the water distribution system; if the determination is that the voltage exists, (i) starting a fault timer and (ii) incrementing the fault timer; determining whether the fault timer has exceeded a predetermined time period; if the fault timer has exceeded a predetermined time period, determining that the water distribution system is not grounded; and upon determining the water distribution system is not grounded, stopping the motor.