8/14/2012 1:08 PM
I've been having some trouble with faults on our pump station skid. The flowtronex panel is telling me "inverter fault", while the ABB VFD is saying there is a short circuit.
I had an electrician out and we went through the panel and he feels comfortable saying all the starting contactors, motors themselves, and wiring is good operable condition, leaving the VFD itself as a possible problem. While talking to our certified flowtronex dealer, I've done some things with his recomendations, but am still recieving the same series of events and an eventual hard fault on our panel from time to time. His general feeling is there is an issue with the windings of one of the pump's motors.
Through anyones experience, what do you surmise is the problem could be, and what should I be looking for when a fault does occur. Everytime I reset the panel and check all the continuity of wires, resistance on fuses, and finally voltage measurements coming through the system once turned back on, there seems to be no issue in my mind in the panel itself. Any help or advice would be appreciated.