FAQ: Power Consumption

 

Our engineering team is frequently asked about furnace power consumption. Consumption rates are different for batch furnaces vs tunnel kilns and rotary kilns. For batch furnaces of all sizes, once maximum temperature is attained it is 60% of the kilowatt rating of the furnace. For example, a unit with a 3 kW transformer designed for operation at 1700 degrees Celsius would use 1.8 kW when heated to maximum temperature. For tunnel kilns and rotary furnaces, the rate is closer to 90%. This steady state draw reflects our commitment to energy-efficient design and the use of high-performance insulation materials.

 

Note that actual consumption may vary slightly based on ambient conditions, load characteristics, and insulation performance. The latter is one of the reasons why it is important to maintain the furnace lining and replace it when it shows signs of degradation. For more information on determining when the lining needs repair or replacement, see this tutorial. 

 

Transformers are integral to the power consumption profile of any electrical system. Did you know that Deltech Furnaces specifies transformers with a kW rating at least 25% higher than the furnace’s maximum power requirement? This deliberate oversizing ensures stable power delivery, accommodates startup surges, and extends component life by reducing thermal and electrical stress. Each transformer is selected based on precise voltage and amperage parameters, minimizing energy loss and supporting long-term operational reliability. Deltech uses only Olsun and Maddox UL listed transformers in the control systems supplied with our furnaces.

 

 

 

FAQ: Power Consumption