Transformer Oil IS 335:2018 Supplier in India

Quick answer

Transformer Oil (IS 335:2018). Inhibited naphthenic mineral oil for power and distribution transformers. High dielectric strength and excellent thermal stability.

Transformer oil insulates and cools. Its condition is tracked with tests such as breakdown voltage (BDV), water content and acidity throughout the transformer's life.

Where it is used

Power and distribution transformers
Oil-filled switchgear and electrical equipment, as specified
Top-up and replacement during maintenance

Key properties

High dielectric strength
Excellent thermal stability
Inhibited naphthenic mineral oil
Supplied for IS 335:2018 applications

Choosing and using it

Filter and dry new oil into the transformer and test BDV before charging; see transformer oil BDV test.
Keep drums sealed and dry; moisture is the main cause of low BDV.
Use clean, dedicated hoses and containers.

Packs, supply and data sheets

Banesto supplies Transformer Oil to plants, workshops and distributors across India. Pack sizes and prices are on enquiry, and we usually reply within 24 hours. Technical data sheets are available on our data sheets page after sign-in, or on request.

Frequently asked questions

What is IS 335?The Indian Standard specification for new insulating oils for transformers and switchgear.

What is a good BDV value for new transformer oil?IS 335 asks for at least 30 kV as received and 60 kV after filtration.

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