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Standard Ratings
Three Phase 45, 75, 112.5, 150, 225, 300, 500, 750, 1000, 1500, 2000 and 2500 KVA
Single phase 10, 15, 25, 37.5, 50, 75, 100 and 167 KVA
Standard High-voltage & insulation level (BIL)
13200 V BIL: 95KV
13800 V BIL: 95KV
14400 V BIL: 95KV
23900GrdY/13800 V BIL: 125KV
24940GrdY/14400 V BIL: 125KV
34500GrdY/19920 V BIL: 150KV
Standard de-energized before operating tap changer
Two - 2½% taps above and below rated voltage
Standard secondary voltage & insulation level (BIL)
The basic insulation level (BIL) of the secondary voltage shall be 30 kV.
208Y/120 V
230Y/133 V
400Y/231 V
480Y/277 V
240D/120 MIDTAP
480D
240D
Standard primary and secondary connections
Delta - Wye
Grounded Wye - Wye
Delta - Delta