Oil-Immersed Distribution Transformers

Transenergy offers radiator type Oil Immersed distribution transformers up to 10 MVA, 33KV Class with CPRI/ERDA/BIS standards approved by MSEDCL, MSEB, CIDCO and other reputed Government authorities / Industries.

Key Features

  • Epoxy resin coated insulation paper
  • Strip / flat copper wire for low voltage and round copper wire for high voltage windings
  • Low Loss, low noise and high reliability

Application

  • Conventional Substation
  • Compact Substation
  • Government / Semi Government Projects
  • Chemical Pharma
  • Refineries
  • Fertilizers
  • State Electricity Board

Technical Specification

MakeTransenergy Equipment’s Pvt Ltd
DesignOil Immersed, Core Type Double Wound Class “A” Insulation, and Designed for continuous duty at rated capacity with particular reference to tropical conditions confirming to IS 1180: 2014 / 2026 / IEC60076.
StandardsIS 1180:2014 : Outdoor type Oil Immersed
IS 2026 / IEC 60076 : Power Transformers
IS 3639 / IEC : Specification for Fittings & amp; Accessories
IS 335 / IEC 60296 : Transformer Oil
IS 1271/ IEC 60085 : Insulating Material
IS 3347 / IEC 60137 : Bushings
Energy EfficiencyBureau of Indian Standard – level 2 (EEL – 2)
Rated Power63kVA to 10 MVA
Voltage Class11kV to 33 kV
Tank ConstructionCorrugated / plain wall tank, Robust construction, Pressure, leak proof & Vacuum tested to CPRI / ERDA standards
Winding Type & MaterialHV winding : Cross over or Disc type
LV winding: Cylindrical Type / Disc Type or Helical Type depending on voltage & current
Windings will be Electrolytic Grade Copper Wires / Strips as per requirement
Core MaterialC.R.G.O. Annealed Steel Material having Low Losses and good grain properties, bolted together to the frame firmly to prevent vibration and noise
InsulationClass “A” as per IS 1271/ IEC 60085
Phases / Frequency3 Phase / 50 Hz
Tapping’s(+) 5% to ( – ) 15% in steps of 1.25% or as requested
Tap Changer On Load / Off Load tap changer (as required)
Vector GroupsIEC standards ( Dyn11 )
Temperature RiseIEC 60076
Type of CoolingONAN / ONAF
Short-Circuit Withstand AbilityTransformers are designed to withstand thermal and dynamic effects resulting from a secondary short-circuit in accordance with IEC 60076-5
Sound LevelIS: 2026 ( Part 10 ) & as per NEMA standards
InstallationsIndoor / outdoor
HV/ LV TerminalsHV Terminals: Cable box / Bare Bushings ( as required )
LV Terminals: Cable Box
TestingRoutine Tests as per ISS / IEC will be carried out prior to dispatch at our works and Test Certificate in Triplicate will be issued.

Standart Fittings

Rating & Diagram Plate
Earthing Terminals
Lifting Lugs for Transformer
Lifting Lugs for Top Cover
Bottom Drain cum Filter Valve with Plug
Top Filter Valve with Plug
Conservator Tank
Magnetic Oil Level Gauge
Oil Filling hole with Plug
Air Release Plug
Thermometer Pocket
Dial Type Oil Temp Indicator
Dial Type Winding Temp Indicator
Buchholz Relay with Valves
Silica gel Breather
Explosion Vent (Pressure Relief Device)
Off. Ckt. Tap Changer Switch with Handle & Position Indicator
L.V. Terminal Box with Extended Copper Flats
Neutral brought out terminal
Cooling Radiators

Optional Fittings

Dial Type Winding Temp Indicator
Tap Changer
L.V. Terminal Box with Extended Copper Flats