Furnace Transformers – Gujarat Transformers Pvt Ltd
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A furnace transformer is designed to increase or decrease the AC voltage, so it suits the heating system. From a circuit, electrical energy is transferred from the circuit to the induction. The main job of a furnace transformer is to regulate the voltage to meet system requirements.

Depending on the furnace requirements, the electricity usage can be amplified or diminished from inside the furnace. These were made in the city of Vadodara in Gujarat and gained popularity onwards. To date, their performance is unmatched. Have a look below:


  • It can withstand high mechanical and thermal stresses
  • Manages high currents easily
  • Low voltage variation is high that suits furnace application
  • 100% standby capacity
  • OFWF cooling
  • It can withstand stress from electric arcs.

How it works

The working procedure of furnace transformers is as follows:

  • Their size ranges are between a few to 150 MVA.
  • The secondary currents go above 100000 A.
  • When winding sections are connected parallelly, high currents can be obtained.
  • Internal bus bars collect the current through high current brushings.
  • The output voltage is adjusted to control the power input.
  • The secondary voltage is adjusted over 3:1 to ensure optimum performance.
  • Regulation is also made by applying taps in the winding.
  • The melt time and breaker maintenance are managed through motor off- and on-load.
  • Large kVA increments are made possible through load-tap changing at extreme ranges.
  • Current is stabilized for arc furnaces through circuit reactance.
  • A reactor is added to the tank for circuit reactance below 7500 kVA.

Blow-out of furnace transformers

There may be several reasons why a transformer may blow:

  • A faulty contractor
  • Wiring issues
  • Power surge

Detection of faults

If you are suspecting issues with the transformer, there may be the following apparent signs to notice:

  • Visual signs – burn marks or bulges may indicate a replacement. Sometimes, only a repair is required, which professionals can do.
  • Humming and Vibrating sounds – although these are normal to an extent, sometimes the iron core and laminations contract or expand, leading to a humming sound.
  • Circuit breaker – if the transformer in the furnace is the issue, the circuit breaker will most likely trip to avoid a voltage surge, which may affect the furnace’s components.
  • Power supply – the system sometimes protects itself from damage that may arise in the power supply by shutting down. Check if it’s normal or if the power supply needs fixation.


he transformer adds to the furnace’s responsibility altogether. It manages the increment or decrement in the voltage of the AC supply of your house or business. This is the transfer process of currents from one point to the other. Your heaters or fans must work without issues if the cycle is going on or off. The furnace cannot function without a transformer. Therefore, a furnace transformer is installed to allow the electrical heating system’s safe and effective use and comfort.