Transec Electric
Transec's business focuses on the reliability of transformers – continuously removing water from the insulating oil of a power transformer.
Transec Electric story
Transec Electric is the new name for Transec UK Ltd. which was established over 15 years ago and since 2004 Transec has managed over 3350 Transformer On-Line Molecular Sieve Drying System projects worldwide.

Transec has supplied to over 20 countries including UK, China, India, Germany, South Korea, Australia, Saudi Arabia. UK installations have included UKPN, National Grid, SSE, Scottish Power, EDF Energy UK, EON, WPD and NPG.

Transec Electric Limited will continue to manufacture, support and develop Transformer On-Line Molecular Sieve Drying Systems and Services from its base in Haverhill, Suffolk., UK.

TRANSEC Operational Principle v.2022
About technology
Since the beginning, Transec's business has been focused on the reliability of transformers, with one of the most important features – continuously removing water from the insulating oil of a power transformer.

Why is it so important?

Power and distribution transformers are some of the most important and expensive assets in a power network. Compared to other equipment, they are very reliable and require very little maintenance since they have no continuously moving parts. However, the insulating materials, being organic, degrade with time in service, and ultimately determine the end of life of the transformer.

In a poorly maintained free breathing transformer water can enter through the natural expansion and contraction of oil as the temperature cycles, but also water is a by-product of the breakdown of the long chain hydro- carbon glucose molecule, as a result of thermal and electrical stress. This leads to degradation of the organic insulation materials as the transformer ages.

Excessive moisture will saturate the insulation and increase its conductivity. At higher temperatures, vapour or free moisture can develop increasing the risk of partial discharge.

TRANSEC is an online molecular sieve, developed and manufactured in the U.K. that is designed to continuously remove water from the insulating oil of a power transformer. As the ppm level in the oil is reduced, water from the solid insulation (where over 95% of the water will accumulate) will migrate from the insulation into the oil to redress the natural equilibrium. This process not only reduces ageing, but will improve the dielectric strength of the insulation, and increase reliability.
Product details

Installations' examples

Clients prefer Transec due to

  • Increases life expectancy transformers
  • Drying transformer continuously during operation
  • Easy transformer maintenance without outage

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