Vasundhara Performance Solutions is the authorised Hyderabad supplier for the Veedol transformer oil range — IS 335 uninhibited mineral insulating oil for new-transformer initial-fill + service top-up, and IEC 60296 inhibited mineral insulating oil for premium / high-voltage transformer service. Per IS 335:2018 / IEC 60296:2020 specifications. Suitable for distribution transformers, power transformers, voltage regulators, instrument transformers, and HV breakers operating up to 500 kV class. Pan-India dispatch from Secunderabad warehouse.
Request Veedol Transformer Oil Quote Call: +91-9912825442IS 335 uninhibited and IEC 60296 inhibited mineral insulating oils for the full transformer range — distribution transformers through 500 kV power transformers.
Highly refined naphthenic mineral insulating oil per IS 335:2018 specification — the standard for new distribution + power transformer initial-fill across India. Breakdown voltage ≥30 kV (untreated, before processing) or ≥60 kV after dielectric treatment. Typical for 11/22/33 kV distribution transformer fill, 66/132 kV power transformer fill, voltage regulator + instrument transformer service.
Premium mineral insulating oil per IEC 60296:2020 specification with antioxidant inhibitor (DBPC / 2,6-DTBP) for extended oxidation stability. For 220 kV / 400 kV / 500 kV power transformer service where oxidation stability matters across 30+ year transformer life. Higher gassing tendency control + lower dielectric loss factor than uninhibited grades.
Specialty high-grade transformer oil for HV / EHV transformer service — lower water content (≤30 ppm), tighter dielectric breakdown threshold (≥70 kV), better tan delta. For 765 kV HVDC + UHV transformer service in Power Grid (PGCIL) and large central-utility substations.
Standard IS 335 transformer oil packaged in service-grade quantities (50 L drums + 200 L barrels) for transformer top-up + service-replacement on existing in-service transformers. State-utility distribution maintenance crews are common buyers — for top-up on aged distribution transformer service. Documented IS 335 conformance per shipment.
Inland-processed (filtered + degassed + dried) transformer oil for service-grade applications where new-transformer-fill grade isn't required but better-than-collected-used-oil quality matters. Cost-economic option for state-utility distribution transformer top-up service. Documented test parameters per IS 335 service-grade limits.
On-site transformer oil filtration, degassing, and dielectric-strength restoration service — partner network. For utility customers / industrial transformer owners where in-place oil treatment is more cost-effective than full oil-change-out. Restores dielectric breakdown to >50 kV typical from <30 kV starting condition.
Standard property values across the range. TDS / MSDS / per-batch COA available on enquiry.
| Property | Test Method | IS 335 | IEC 60296 Inh. | Type T-IV/V |
|---|---|---|---|---|
| Density at 30°C (g/cm³) | ASTM D1298 | 0.880-0.895 | 0.880-0.895 | 0.880 |
| Kinematic Viscosity at 40°C (cSt) | ASTM D445 | ≤12.0 | ≤12.0 | ≤9.5 |
| Pour Point (°C) | ASTM D97 | ≤-30 | ≤-30 | ≤-40 |
| Flash Point (°C, COC) | ASTM D92 | ≥140 | ≥140 | ≥145 |
| Breakdown Voltage (kV, untreated) | IEC 60156 | ≥30 | ≥30 | ≥40 |
| Breakdown Voltage (kV, treated) | IEC 60156 | ≥60 | ≥70 | ≥75 |
| Water Content (ppm, max) | IEC 60814 | ≤50 | ≤30 | ≤20 |
| Tan Delta at 90°C | IEC 60247 | ≤0.005 | ≤0.0010 | ≤0.0010 |
| Inhibitor Content (% wt) | IEC 60666 | — | 0.08-0.40 | 0.08-0.40 |
| Total Acid Number (mg KOH/g) | IEC 62021 | ≤0.03 | ≤0.01 | ≤0.01 |
Standards compliance: IS 335:2018 (Indian uninhibited mineral insulating oil) · IEC 60296:2020 (international inhibited mineral insulating oil) · IS 1866:2017 (in-service transformer oil maintenance) · IEC 60422:2013 (in-service oil supervision) · ASTM D3487 (US transformer oil specification)
Where Veedol transformer oils ship from our Hyderabad warehouse — by voltage class and transformer type.
IS 335 uninhibited mineral insulating oil — the workhorse for state-utility distribution-transformer initial-fill and service top-up. TSSPDCL, APSPDCL, APEPDCL, KSEB-utility distribution maintenance crews are regular buyers via PSU rate-contract supply. Standard packaging in 50 L / 200 L for distribution maintenance stores.
IS 335 uninhibited or IEC 60296 inhibited depending on customer specification — typical for state-utility transmission company power-transformer service (TSTRANSCO, APTRANSCO, PGCIL distribution-circle service). 220 kV class transformers increasingly specifying inhibited grade for extended service life.
IEC 60296 inhibited mineral insulating oil or Type T-IV / T-V high-grade insulating oil for PGCIL / Power Grid Corp + central-utility 400 kV / 765 kV power transformer service. Lower water content + tighter dielectric breakdown + better tan delta requirements compared to lower-voltage transformer service.
IS 335 uninhibited grade for in-plant 11 kV / 33 kV / 66 kV transformer service — cement plants, steel plants, refineries, large process plants. Service top-up + new-transformer fill. Pairs with our cement plant + auto-ancillary portfolios.
IEC 60296 inhibited grade for power-station step-up transformer service — coal / gas / hydro / nuclear / solar generation. NTPC, NLC India, NHPC, state-generation utility GENCOs are common customers. Service top-up + new-transformer fill across the portfolio.
Voltage regulator, instrument transformer, traction transformer (Indian Railways), shunt-reactor, and HV-breaker service-grade oil supply. Per-shipment IS 335 / IEC 60296 conformance documentation. Filtration / degassing service available through partner network for in-place oil treatment.
For utility procurement officers and industrial substation operators selecting transformer oil — IS 335 conformance, per-shipment dielectric documentation, and PSU rate-contract availability shape the supply choice.
Stocked grades ship same-day from Secunderabad warehouse. Specialty / synthetic variants typically 3-5 working days. Pan-India dispatch via authorised transport network.
Genuine Veedol product through manufacturer-authorised supply. Manufacturer authorisation documentation provided on enquiry. Per-batch traceability for warranty + audit-trail compliance.
Viscosity selection, drain-interval optimisation, cross-equivalence mapping with competitor brands, contamination-event troubleshooting. Free for projects where Vasundhara is the supply partner.
Bundle Veedol products with our wider lubricant + grease + speciality-fluid portfolio. One PO, simplified GST reconciliation, single accountable contact for plant-wide supply.
Per-batch test certificates (TDS, MSDS, COA), manufacturer authorisation letters, BIS conformance reports where applicable. Suitable for ISO 9001 / IATF 16949 / pharma audits. Pre-shipment sample retention available.
Periodic sample analysis — viscosity, TAN/TBN, water content, particle count (ISO 4406), wear-metal spectrometry. Optimises drain intervals (typically 20-40% extension over manufacturer defaults) + catches failure modes early.
Standard packaging across the range. Bulk pricing on volumes >1,000 L.
| Pack Format | Volume | Typical Use Case |
|---|---|---|
| Pail (HDPE) | 20 L | Single-machine top-up, sample-and-trial orders |
| Drum | 50 L | Mid-duty maintenance stock |
| Barrel (steel) | 210 L | Plant maintenance stores standard |
| IBC Tote | 1000 L (1 MT) | Bulk supply for high-volume users |
| Bulk Tanker | 3,000-5,000 L+ | Direct-to-tank delivery, large plants |
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Common questions from utility + substation buyers sourcing Veedol transformer oils through Vasundhara.
IS 335:2018 is the Indian standard for uninhibited mineral insulating oil — without antioxidant additive. The default for distribution + most power transformer service in India. IEC 60296:2020 is the international standard, available in both uninhibited and inhibited (with DBPC antioxidant) grades. The inhibited grade offers extended oxidation stability — important for HV / EHV transformer service across 30+ year design life. Cost difference is ~10-15% for inhibited; service-life extension justifies the premium for high-voltage applications.
Yes. Veedol Transformer Oil — IS 335 grade meets all properties specified in IS 335:2018 including: kinematic viscosity at 40°C ≤12 cSt, pour point ≤-30°C, flash point ≥140°C, breakdown voltage ≥30 kV (untreated), water content ≤50 ppm, total acid number ≤0.03 mg KOH/g. Per-batch test certificates provided showing conformance to all IS 335:2018 parameters. Suitable for state-utility + PSU distribution + power transformer service.
For new-transformer fill, IEC 60156 breakdown voltage requirement is typically ≥60 kV (after on-site dielectric treatment — filtration, degassing, drying). The oil-as-supplied (untreated) typically tests at 30-50 kV. On-site treatment via filtration + degassing brings the breakdown voltage above the spec threshold before transformer commissioning. Vasundhara provides on-site treatment service through partner network for new-transformer commissioning + in-service transformer oil restoration.
Yes — Veedol IS 335 uninhibited transformer oil is compatible with most other IS 335 / IEC 60296 mineral insulating oils for top-up service. Top-up volumes <10% of transformer capacity rarely cause issues. For larger top-up volumes (>10-20%) or when mixing inhibited and uninhibited grades, sample-test the mixed oil against IS 335 / IEC 60296 limits before energising the transformer. Document the mix-batch in the transformer's oil-condition record.
Per IS 1866:2017 / IEC 60422:2013 in-service transformer oil maintenance: distribution transformers (11-33 kV) — annual test (breakdown voltage, water content, TAN); power transformers (66-220 kV) — six-monthly test plus dissolved gas analysis (DGA) annually; EHV power transformers (400+ kV) — quarterly DGA + six-monthly comprehensive testing. Filtration / degassing / dehydration treatment recommended when breakdown voltage drops below 30 kV or water content exceeds 30 ppm.
Yes. Vasundhara is GeM-registered seller. Veedol transformer oils (IS 335 uninhibited + IEC 60296 inhibited) available under standing rate contract for PSU + utility buyers — TSTRANSCO, APTRANSCO, PGCIL, NTPC, NLC India, state-utility GENCOs and DISCOMs, Indian Railways traction transformer maintenance, defence establishments. Documentation pack includes Udyam-MSME registration, manufacturer authorisation from Tide Water Oil, IS 335:2018 + IEC 60296:2020 conformance certificates.
Standard Veedol transformer oil packaging: 50 L drums + 200 L barrels for distribution-level service top-up. 1000 L IBC totes for power-transformer-level top-up. Bulk-tanker delivery (5,000-10,000 L+) for new power-transformer commissioning fills + bulk substation maintenance stores. PSU buyers can specify per their stores standard via the GeM rate contract.
Yes. Vasundhara Performance Solutions Pvt Ltd is the authorised Veedol industrial lubricant distributor for Hyderabad, Telangana and Andhra Pradesh — including transformer oil supply for state-utility, central-utility, PSU, defence, Indian Railways and industrial customers. We supply genuine Veedol transformer oils manufactured by Tide Water Oil Co. (India) Ltd, with full manufacturer authorisation documentation provided on enquiry. For our complete Veedol portfolio, see our Veedol brand page.
Complete Veedol industrial portfolio supplied by Vasundhara — single-vendor sourcing for PSU + utility procurement.
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