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Technological advances and improved manufacturing processes in recent years means that Dry Type Transformers now have many advantages in comparison to oil transformers, and are a cost effective and extremely reliable solution suitable to most environments.


What is more commonly used as a winding material for dry type transformers – Copper (Cu) or Aluminum (Al)?

ANSWER:  Aluminum is more commonly used for its thermal properties similar to the resin – this guarantees more suitable thermodynamic movement, which in turn has a positive impact on the expected lifespan of the transformer.

Is Copper not a better winding material than Aluminum for Dry Type Transformers?

ANSWER: Aluminum is better due the above-mentioned improved thermal properties.   This has a positive impact on the expected lifespan, and is part of the reason that we are offering an industry-best 2 Year Guarantee.

Is the life expectancy of Copper wound transformers longer than Aluminum wound transformers?

ANSWER: Given the same technical characteristics, it is the same for both.

What is the life expectancy of Dry Type Transformers?

ANSWER:   Generally speaking, it is a minimum of 25 years.  This is similar to Oil Type Transformers.  Transformers’ life expectancy is naturally dependent on operational conditions.

What percentage of dry type transformers that you manufacture is Copper wound vs Aluminum wound?

ANSWER: 90% Aluminum vs 10% Copper.

What is the guarantee period on your Dry Type Transformers?

ANSWER:   We offer an industry-best full 2 Year Guarantee.

Are there scenarios or applications where Copper wound transformers are more suitable than Aluminum wound units?

ANSWER: In Dry Type Cast Resin Transformers, the only impact is on the Low Voltage Coils, and in particular to the thermal plates.  These are the only active parts that are exposed to atmospheric agents – the remaining parts are fully cast in epoxy resin or impregnated in polyester resin and therefor insulated from the environment.

The choice between the two materials can depend on their chemical reactions to the presence of chemicals in the installation environment.

Should you consider a Dry Type Transformer? Talk to us –  we will do a full assessment and give you expert, objective advice   >