Distribution Transformer with OLTC (INDOOR TYPE)

Our Distribution Transformers with OLTC (INDOOR TYPE) are manufactured with A standard rating and customer requirements. All transformers are designed for continuous operation with maximum efficiency to confirming IS 1180 standards.

A Distribution Transformer with OLTC (On-Load Tap Changer) – Indoor type is a transformer used in distribution systems that can adjust its output voltage while operating (without switching off) and is designed for installation inside buildings or substations.

🔹 Purpose:

–  Supplies power to end users at required voltage (e.g., 415 V, 230 V)
–  Maintains constant output voltage despite load or input variations
–  Used where stable voltage is critical

 

🔹Standard Fitting:

• • Rating and diagram plate.
  • Earthing terminals – 2 nos.
  • Lifting lugs.
  • Oil level indicator (plain)
  • Drain-cum bottom filter valve with plug.
  • Oil filling hole with the plug on conservator.
  • Oil conservator with a drain plug.
  • Air release plug.
  • Silica gel air breather.
  • Bi-directional flat rollers.
  • HV terminals-outdoor bushings.
  • LV terminals-outdoor bushings.
  • Radiators.
  • Filter valve with plug.
  • Thermometer pocket.
  • Oil temperature indicator.
  • Externally operated off circuit tap changing Switch.
  • Explosion vent.
  • Sampling value (for 2000 KVA & above transformers only)

🔹 Accessories on Request:

• • LV and HV cable boxes
  • Winding temperature indicator (WTI).
  • Buchholz relay
  • Magnetic oil level gauge
  • Marshaling box
  • Disconnecting chamber
  • Oil temperature indicator with electrical contacts (OTI)
  • Pressure relief valve

🔹 What is OLTC?

OLTC (On-Load Tap Changer) allows changing transformer tap positions without interrupting supply.

It regulates voltage by changing the turns ratio of the transformer.

🔹 Applications:

• • Commercial buildings (malls, hospitals)
  • Industrial plants
  • Indoor substations
  • Areas with frequent voltage fluctuations

🔹After Sales Service:

Every equipment sold is backed by our excellent & prompt service network. Our organization is well known by virtue of strong support in terms of pre-sale & after sales rendered by us during any solutions.