Substation Transformers

Source: Sunbelt Transformer, Inc.
Substation Transformers
Features of the Substation Transformer are:

Standard Features

  • No-Load Tapchanger when required
  • Dial-Type Thermometer
  • Secondary Spade Connectors
  • Drain Valve or Combination Drain and Sampler Valve
  • Pressure Relief Valve (smaller KVA Ratings)
  • Upper Filter Press Connection
  • NEMA Two-Hole Ground Pad
  • Stainless Steel Nameplate
  • Provision for Jacking and Lifting
  • Base Suitable for Rolling or Skidding
  • Reinforced Steel Plate Tank
  • Externally Clamped High and Low Voltage Bushings
  • Welded Cover with Handhole
  • Enamel Finish to 4 mil thick (Your choice of color)

Optional Features

  • High Fire Point Fluid
  • 50 HZ Frequency
  • 55/65 Degree C Temperature Rise
  • Pressure Vacuum Gauge (also with Bleeder)
  • Pressure Relief Device
  • Sudden Pressure Relay
  • Winding Temp Indicator
  • Secondary Molded-Case Breaker
  • Lightning Arresters
  • Metering Package
  • CT's and PT's
  • Gauges and Contacts
  • Fans and Controls
  • Provisions for Fans and Controls
  • Primary Load Interrupter


  • Full Vacuum-Rated Tank on Larger Power Units
  • Cylindrical or Rectangular Coil Design depending upon KVA Rating and Voltage
  • Distributive Gap or Mitered Silicone-Steel Core
  • Integrally Heated Vacuum-Drying Process


  • 75 KVA through 50 MVA plus additional fan-cooled ratings
  • Primary Voltages through 138,000 Volts (650 KV BIL)
  • Secondary Voltages through 69,000 Volts (350 KV BIL)

Sunbelt Transformer, Inc., 1922 South MLK Jr Dr, Temple, TX 76504. Tel: 254-771-3777; Fax: 254-771-5719.