Substation Transformers


Pioneer manufactures Substation Transformers up to 25 MVA at 69 kV (350 kV BIL) with or without OLTC (on-load tap changer). Units can be supplied with cover or wall mounted bushings within a full height air terminal chamber, a bus duct throat or a junction box. All units comply either with the latest CSA or ANSI standards.

Optional Features

  • 50 Hz
  • 55/65° C temperature rise
  • Provision for future or with fan cooling package
  • High fire point liquid : FR3, Silicone or Beta Fluid
  • Detachable cooling radiators with shut off valves
  • Galvanized cooling radiators
  • On-load tap changer
  • HV and LV surge/lightning arrestors
  • External fuses
  • Dial type thermometer
  • Liquid level gauge
  • Winding temperature gauge
  • Pressure vacuum gauge
  • Pressure vacuum gauge with bleeder
  • Pressure relief device
  • Rapid pressure rise relay
  • Gauges furnished with alarm contacts
  • Primary, secondary and neutral current transformers
  • Neutral grounding resistors (NGR)
  • K rated designs
  • Tamperproof design
  • Total stainless steel or hybrid (mild steel/ stainless steel) construction