Customer with serious over /under voltage problems .Local POCO has been less than helpful.Customer wants me to try to solve the problem.This is a residence-600 amp single phase service (3) 200 amp main breakers) 50KW generator w/auto transfer switch.The problem is the incoming voltage (240)gets out of balance example:(phase a =180 vac to ground, phase b =60 vac to ground. We know its a POCO problem, because when the customer has problems, others within a 2 block area have the same problem.I am considering installing a voltage relay with over/under voltage adjustments connected to a capacitor trip device connected to shunt trip main breakers.Has anyone here tried anything like this?
Opinions welcomed.