Pad-Mounted Transformers, 75KVA~5000KVA up to 36KV

Pad-Mounted Transformers, 75KVA~5000KVA up to 36KV from NFC Electrical Co, Ltd.

By: NFC Electrical Co, Ltd.  01-01-2010
Keywords: Electrical Maintenance, Transformer

Standard Ratings

  • 45, 75, 112.5, 150, 225, 300, 500, 750, 1000, 1500, 2000, 2500 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 
  • NEMA taps (14400, 13800, 13200, 12470, 12540 V)
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
Standard Impedance Voltage (%)
  • 150KVA~400KVA 3.0% ~ 4.0%
  • 400KVA~750KVA 3.5% ~ 4.5%
  • 750KVA~1500KVA 4.0% ~ 5.5%
  • 1500KVA~2500KVA 5.0% ~ 6.0%
Standard Sound Level (Average) decibels
  • 150KVA~400KVA 55 db
  • 400KVA~750KVA 58 db
  • 750KVA~1500KVA 60 db
  • 1500KVA~2500KVA 62 db
Following is required it shall be clearly stated on the inquiry:
  • Overcurrent protection by a Bay-O-Net expulsion fuse
  • Overcurrent protection by a Bay-O-Net expulsion fuse/ with a partial range under-oil ELSP current-limiting fuses
  • Primary loadbreak dry-well fuse canisters
  • Provided with an on/off loadbreak switch
  • 4-position Loadbreak Switch / V-Blade Switch / T-Blade Switch
Accessories: Any additional accessories will be specified on the inquiry
  • Externally operated off- load tap changer 
  • Pressure relief valve 
  • Drain valve with sampler on top and bottom 
  • Liquid level gauge 
  • Oil temperature gauge 
  • Ground pad and clamp with grounding 
  • Stainless Diagrammatic name plate 
  • Jacking Pad.

Keywords: Electrical Maintenance, Transformer