P
hi
our transformer which is feeding to an arc furnace 20MVA, primary volatage 34.5kV with 17 taps and secondary voltage 300-650V with open delta. Secondary is connected to electrods, through watercooled busbars which are supported on insulators.
The problem is, the open ckt voltage is found to be imbalance 750/450/400.
is same identical other transformer the voltage remains same 420/400/410.
what may the reasons for that and what should i do?
our transformer which is feeding to an arc furnace 20MVA, primary volatage 34.5kV with 17 taps and secondary voltage 300-650V with open delta. Secondary is connected to electrods, through watercooled busbars which are supported on insulators.
The problem is, the open ckt voltage is found to be imbalance 750/450/400.
is same identical other transformer the voltage remains same 420/400/410.
what may the reasons for that and what should i do?