After testing a power transformer(pt) and closing its wiring terminals I've encountered that phase S 63 kV correct voltage and phases R and T shows incorrect voltage 32 kV.
Can any body tell why?
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As I Know when you close the breaker you have seen the voltages. You should check the secondary circuits fuses. This voltages shows open circuits of one poles. If the polarity of poles were incorrect you shoud have seen 37Kv on other poles. If fuses were healthy you shoud check the open circuits of PT secondery circuits.