This might be a generic question that any electrician can easily answer, but maybe some tips/experience would be nice for reference.
I am running a borehole pump (under ground ,120m below) and a water tank pump, both on three phase.
I have no issues, but our supply is not very stable (frequency is OK) as the voltage ranges from 390V up to 445V over the phases.
My question, the upper 445V, is it OK for the inverter(s) and pump(s)? If so, what is the absolute upper limit?
(Maybe for reference, our supplier states 415V with a 10% deviation, so technically 456V is still acceptable to them).
Thanks in advance