Hermetically Sealed Oil Filled Transformers

Hermetically sealed oil filled Transformers are widely used these day all over the world for this compactness, excellent heat dissipating properties and longer life. Vardhaman make Hermetically Sealed Transformer is most commonly installed inside Package Sub-stations in India.

Salient Feature :

  • Step up and step down transformers.
  • Sealed type Bottled Top With dry air inside.
  • No conservator, so expansion of oil takes place through flexible corrugated walls or compression of dry air.
  • Maintenance free as oil has no contact with external air thus no contamination of oil.
  • Suitable for installation inside package Sub-stations.
  • Compact in size as compared to normal tank with PSR radiators.
  • Excellent heat dissipation properties through corrugated fin walls.
  • Can be with corrugated fins walls or press steel radiators.
  • DGPT2/DMCR relay for multiple Protections is optional.
  • Tailor made designs to meet customer requirement.
Type Features
Ratings & Voltages Class Three Phase Form 25KVA Upto 1600KVA 33KV Class
Duty Indoor/Outdoor
Applicable Standards IS: 2026, IEC: 60076, BS, SANS,ANSI etc.
Losses As per relevant standard/customer requirement
Impedance As per relevant standard or as per customer requirement
Tapping Off circuit Tap Change r(OCTC) or load tap Changer (OLTC)
Vector Group Dym11, Dyn5, Yzn11 Etc.
Frequency 50 Hz
Insulation Class A
Cooling ONAN
Winding Material Copper(Cu)/Aluminum (Al)
Insulating Fluid Mineral Oil or synthetic Ester oil confirming to relevant standards or as per customer requirement
Accessories and Fittings As per customer requirement