How to Improve the Reliability of Electric Power Equipment with the Correct Transformer Oil

Transformer oils have certain technical and chemical parameters. These parameters define the scope of the oil’s applications and use.

The “Dissipation Factor” is one of the most important indications of oil quality and is a measure of the oil’s dielectric strength.  Aging causes oil to lose its performance capabilities and poses a threat to the safe operation of oil filled equipment.  Dielectric strength testing is a safety concern and must never be neglected.

The actual dielectric strength of the oil is mostly affected by the presence of solid particles, moisture, and other contaminates.  It is therefore, important to remove solid particles, water and other contaminates from transformer insulating oil to maintain the operating performance of the oil.  The best way to ensure the purity of your transformer oil is to use the GlobeCore Process performed by one of its various oil purification or oil regeneration units.

Another performance characteristic of oil is the oil’s viscosity rating.  An oil’s viscosity rating indicates the oil’s “resistance to flow” or “speed of flow” as measured through a viscometer.  The viscosity, or thickness of the oil can also affect the oil’s ability to transfer heat and cool the transformer.

Setting temperature and flashpoint temperature both help to indicate the allowable range of oil operation.  A “Low Setting” temperature is important when the oil is used in extremely cold climates.  A high oil flashpoint is important for reducing the potential fire safety concerns.

Another important quality of the oil is its oxidation stability, i.e. the ability to maintain its properties during prolonged use.  Oxidation stability is influenced by many factors, both internal such as antioxidant additives, reaction with metals, formation of gases in the oil, etc., and external factors such as moisture, air and temperature.  This parameter is important for the service life of both the oil and oil filled equipment.

Many oils, e.g. GK and TKp contain antioxidant additives which can extend the service life of oil to as long as 20-25 years.

Purchasing transformer oil from manufacturers and traders is not a problem these days.  Each company is competing and attempting to sell at the lowest price and offer the best service.

Transformer oil is an indispensible part of the insulation system of electric power transformers and other electrical equipment.  High purity and low viscosity are key in allowing your selected oil to be used in electric power transformers.

Depending on the actual equipment, transformer oils function as a dielectric liquid or, for instance, as an arc-extinguishing media in switching devices.

Quality oil has high dielectric strength, a low setting point, a high flash point, high oxidation stability, and the availability of convenient and practical transportation vessels.  High quality oil significantly extends reliable operation of oil filled electric equipment.


Above all, the oil in transformers and electrical equipment must be kept clean and free from moisture in order to provide the best possible service to your electrical equipment and prevent the need for unscheduled maintenance events.

It’s time to get with the Process.  The GlobeCore Process!




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