General Description

Kalpa offers a complete line of oil cooled three-phase distribution transformers that meet applicable IS / IEC standards. With high voltages up to 33kV and ratings up to 10 MVA, transformers are designed for outdoors covering domestic, International , commercial and industrial applications. High-grade materials, combined with sophisticated engineering design systems and state of the art test infrastructure are key elements of a transformer that will deliver years of highly reliable service.

  • Design can meet any stringent specifications
  • Offering low losses as per request. As per IS1180/EEL - 1, 2 & 3 BEE STAR RATING
  • Capacity to Execute large volume orders.


Construction Type Indoor/Outdoor
Duty Type Outdoor / Indoor, Pole or Ground Mounted
Voltage Class 3.3, 6.6, 11, 22, 33kV or any specific
No of Phases 1 or 3 Phase, ONAN, KNAN
Frequency 50/60 Hz
Capacity Up to 10MVA
Insulating Fluid PCB FREE Mineral Oil, both inhibited & Biodegradable FR3,uninhibited as per IS335/IEC60296 and customer requirement
Class of Insulation Class A
Tap Changer Off Circuit or On Load
Tapping Range OCTC or OLTC as per customer requirement
Winding Material Aluminum or Copper with multi paper covering
Applicable Standards IS 1180 ,IS 2026, IEC 60076, ANSI, IEEE
Painting Enamel, Epoxy, Polyurethane or customer specific

Assured Features

  • Highest dielectric insulation property to withstand Lightening Impulse
  • Mechanical design to withstand short circuit forces arising during faults
  • Optimum oven heating under vacuum as to achieve desired compression height and maximum insulation resistance (IR) to windings
  • Adequate ducts between layers, coils, discs for maximum oil flow and reduced hot spot temperature.
  • Step-lap designed CRGO laminations for lower losses and excitation current
  • Pre-compressed Insulation material for minimal moisture absorption

Standard Fittings

  • H.V. Cable box
  • L.V. Cable box with bus bar or bus duct
  • Off circuit tap links
  • Conservator oil filling hole With cap & drain plug
  • Undercarriage with four Bi-directional rollers
  • Earthing terminals
  • Drain cum bottom filter Valve with sampling plug
  • Top filter valve with Sampling plug
  • Plain Oil Level Gauge
  • Rating diagram plate
  • Air release device
  • Thermometer Pocket
  • Lifting lugs
  • Pressed Steel Radiators (Fins or corrugated type)
  • Double Diaphragm explosion vent
  • Silica gel breather
  • Additional Neutral bushing
  • First filling of oil

Optional Fittings

  • Detachable Radiators with isolating valves
  • Jacking Pads
  • Dial type Oil Temperature Indicator With A/T contacts
  • Dial type Winding Temperature Indicator with A/T contacts
  • Magnetic Oil Gauge with A/T contactsw
  • Buchholz relay with A/T contacts
  • Marshaling box with control wiring
  • Equalizer pipe between Conservator & explosion vent
  • On Load Tap Changer
  • RTCC Panel with automatic Voltage Regulator (AVR)
  • Pressure Release valve
  • DGPT Relay

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