Creating a range of oils with low-gassing tendencies

Creating a range of oils with low-gassing tendencies


It is typically recommended that instrument transformers use gas absorbing oils with negative gassing. However, it was difficult for OEMs and utility companies to use these oils, as they are less stable, expensive and not easily available.

As a result, companies end up using highly gas-evolving oils which are easily available in the market. This ultimately results in the untimely tripping of transformers due to excessive hydrogen gas evolution.

APAR’s solution:

APAR studied the current issues faced by the industry, and was able to develop a range of products with low gassing tendencies like trace inhibited 60HT. Our range was sent to global OEMs for testing, and proved successful in homologation studies.


We also introduced inhibited 60 SNX-LG with similar low gassing and higher oxidation stability. These cost-effective oils perform well in instrument transformers, and enable them to have a trouble-free life.


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