Primary or Secondary Open Substation Transformers Substation VFI Transformer

Substation transformers can be designed and configured to meet any application requirements. Substation transformers are available in primary or secondary open substation with cover-mounted bushings fed from overhead lines; or primary or secondary unit substation with enclosed sidewall-mounted bushings for connections to primary or secondary switchgear.

• Pressure vacuum bleeder valve
• Cover-mounted pressure relief device (for oil-cooled units; standard with R-Temp Fluid units)
• Detachable, bolt-on radiators with valves
• Monitoring devices:
  – Dial-type thermometer with alarm contacts (standard with FA Fan Package)
  – Liquid level gauge with alarm contacts
  – Pressure/vacuum gauge with alarm contacts
  – Cover-mounted pressure relief device with alarm contacts
  – Rapid pressure rise relay
  – Optional seal-in panel
• Winding temperature indicator with alarm contacts
• Forced air fan control package (includes fans, NEMA 4 control box, fan controls, dial-type thermometer with alarm contacts)
• Nitrogen blanket with purge valves (3 psi)
• Control box
• Primary and secondary termination enclosure options (Unit Sub)
  – Throat
  – Flange
  – Top- or bottom-entry air terminal chamber
  – Top- or bottom-entry full length cabinet
• FM Approved and Code Listed transformer
• Envirotemp FR3 fluid, a fire-resistant seed oil-based dielectric coolant with desirable environmental characteristics
• CSA/CEA designs
• Per UL Classification
• K-Factor rated transformer

Substation Transformers

Unit
Open
VFI
Available stock

Transformer Features

Standard Features
Optional Features

Transformer Protection

Overcurrent Protection
Overvoltage Protection

Literature

"The Substation of the Future," Utility Automation & Engineering, Nov. 2006

Economic Analysis
VFI Brochure