Vasundhara Performance Solutions is the authorised Hyderabad supplier for Balmerol IS 335:2018 uninhibited mineral insulating oil — the standard for distribution and power transformer initial-fill + service top-up across India. Manufactured by Balmer Lawrie & Co. Ltd, a Schedule-A Mini Ratna Govt of India PSU under the Ministry of Petroleum & Natural Gas. Naturally aligned with Make-in-India + PSU-preference procurement at state-utility transmission companies (TSTRANSCO, APTRANSCO), distribution companies (TSSPDCL, APSPDCL), central utility PGCIL, NTPC, NHPC, defence establishments, Indian Railways traction transformer service. Pan-India dispatch from Secunderabad warehouse.
Request Balmerol 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 PSU-manufactured standard for new distribution + power transformer initial-fill across India. Breakdown voltage ≥30 kV (untreated) or ≥60 kV after on-site dielectric treatment. Standard 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.
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 — top-up on aged distribution transformer service. Documented IS 335 conformance per shipment.
Reclaimed (filtered + degassed + dried) transformer oil for service-grade applications. Cost-economic option for state-utility distribution transformer top-up service. Documented test parameters per IS 335 service-grade limits. Common for state-utility distribution-circle aged-transformer service top-up.
IS 335 grade transformer oil packaged for Indian Railways traction-transformer + locomotive-transformer service. Standard for Northern, Southern, Eastern, Western, Central, South-Eastern Railway zone traction substation maintenance + electric locomotive on-board transformer service.
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 (Balmerol) | IEC 60296 Inh. | Reclaimed Service |
|---|---|---|---|---|
| Density at 30°C (g/cm³) | ASTM D1298 | 0.880-0.895 | 0.880-0.895 | 0.880-0.895 |
| Kinematic Viscosity at 40°C (cSt) | ASTM D445 | ≤12.0 | ≤12.0 | ≤12.0 |
| Pour Point (°C) | ASTM D97 | ≤-30 | ≤-30 | ≤-30 |
| Flash Point (°C, COC) | ASTM D92 | ≥140 | ≥140 | ≥140 |
| Breakdown Voltage (kV, untreated) | IEC 60156 | ≥30 | ≥30 | ≥30 (after treatment) |
| Breakdown Voltage (kV, treated) | IEC 60156 | ≥60 | ≥70 | ≥50 |
| Water Content (ppm, max) | IEC 60814 | ≤50 | ≤30 | ≤50 |
| Tan Delta at 90°C | IEC 60247 | ≤0.005 | ≤0.0010 | ≤0.005 |
| Inhibitor Content (% wt) | IEC 60666 | — | 0.08-0.40 | — |
| Total Acid Number (mg KOH/g) | IEC 62021 | ≤0.03 | ≤0.01 | ≤0.03 |
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) · BIS-marked variants available · Manufactured under Balmer Lawrie ISO 9001 / 14001 / 45001 certified plants
Where Balmerol transformer oils ship from our Hyderabad warehouse — by voltage class and PSU customer profile.
IS 335 uninhibited grade for state DISCOM distribution-transformer service — TSSPDCL, APSPDCL, APEPDCL, KSEB-utility distribution maintenance. Standard supply for 11/22/33 kV distribution transformer initial-fill + service top-up. PSU rate-contract supply via GeM.
IS 335 or IEC 60296 inhibited grade for state TRANSCO power-transformer service — TSTRANSCO, APTRANSCO, KPTCL, MSEDCL transmission. 66/132/220 kV power transformer initial-fill + service top-up.
IEC 60296 inhibited grade for PGCIL / Power Grid Corp 220 kV / 400 kV / 765 kV power-transformer service. EHV / UHV transformer service. Lower water content + tighter dielectric breakdown matters for extended service life.
IEC 60296 inhibited grade for power-station step-up transformer service — coal / gas / hydro / nuclear / solar generation. NTPC, NHPC, NLC India, state-generation utility GENCOs are common customers via PSU rate-contract supply.
IS 335 grade for Indian Railways traction-substation transformer service + electric locomotive on-board transformer service. All Indian Railways zones — Northern, Southern, Eastern, Western, Central, South-Eastern, North-Western, etc.
IS 335 grade for Defence campus electrical infrastructure transformers — Cantonment electrical depots, Ordnance Factory campus power. Industrial in-plant transformer service for cement, steel, refinery, large process plants. Pairs with our cement plant + GeM procurement portfolios.
For state-utility procurement teams, central-utility transmission-company officers, and PSU substation operators — Balmer Lawrie's PSU manufacturer status streamlines vendor empanelment + supply cycles.
Balmer Lawrie's Schedule-A Mini Ratna Govt of India PSU status under Ministry of Petroleum & Natural Gas satisfies Make-in-India + PSU-preference procurement clauses for state utilities, central utilities, defence, Railways. Vendor empanelment cycles are typically faster than for private-brand alternatives.
Vasundhara is GeM-registered seller. Balmerol IS 335 transformer oil + IEC 60296 inhibited grade available under standing rate contract for state-utility DISCOMs, TRANSCOs, central utility (PGCIL), generation utilities (NTPC, NHPC, NLC), Railways, and Defence. GFR-2017 compliant for deferred-payment supply.
Per-batch test certificates documenting conformance to all IS 335:2018 parameters — kinematic viscosity, pour point, flash point, breakdown voltage, water content, total acid number, dielectric loss factor. Suitable for state-utility audit + transformer commissioning documentation.
Filtration / degassing / dehydration treatment service through partner network — for new-transformer commissioning + in-service transformer oil restoration. Restores breakdown voltage from <30 kV starting condition to >50 kV service-spec compliance.
Same-day Hyderabad dispatch for stocked grades. Pan-India delivery via authorised transport network for outside-Telangana orders. Bulk-tanker delivery (5,000-10,000 L+) for new power-transformer commissioning fills + bulk substation maintenance stores.
One PO for IS 335 transformer oil + Catmatsu hydraulic + HP PLUS gear + Protomac greases + Trans Q transmission fluids. Reduces vendor count, simplifies procurement, single accountable contact for state-utility / PSU lubricant + insulating-oil requirements. See our Balmer Lawrie portfolio.
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 state-utility + PSU substation buyers sourcing Balmerol 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 with DBPC / 2,6-DTBP antioxidant inhibitor — extended oxidation stability for HV / EHV transformer service across 30+ year design life. Cost difference is ~10-15% for inhibited grade; service-life extension justifies the premium for 220 kV+ applications.
Yes. Balmerol IS 335 transformer oil meets all properties specified in IS 335:2018 — kinematic viscosity at 40°C ≤12 cSt, pour point ≤-30°C, flash point ≥140°C, breakdown voltage ≥30 kV (untreated) / ≥60 kV (treated), water content ≤50 ppm, total acid number ≤0.03 mg KOH/g, dielectric loss factor at 90°C ≤0.005. Per-batch test certificates provided showing conformance to all IS 335:2018 parameters. Suitable for state-utility + PSU distribution + power transformer service.
All four meet IS 335:2018 specifications with comparable dielectric performance. Balmerol's structural advantage is PSU-manufactured status — Balmer Lawrie is a Schedule-A Mini Ratna Govt of India PSU — relevant for buyers with Make-in-India + PSU-preference procurement clauses (state utilities, central utilities, defence, Railways). For private-sector industrial substation buyers without such preferences, all four are commercially-equivalent; selection comes down to price, availability, and existing vendor relationships.
Yes. Vasundhara is GeM-registered seller. Balmerol IS 335 uninhibited + IEC 60296 inhibited transformer oils available under standing rate contract for state DISCOMs (TSSPDCL, APSPDCL, APEPDCL), TRANSCOs (TSTRANSCO, APTRANSCO), central utility PGCIL, generation utilities (NTPC, NHPC, NLC), Indian Railways, defence. Documentation pack includes Udyam-MSME registration, manufacturer authorisation from Balmer Lawrie, IS 335:2018 + IEC 60296:2020 conformance certificates.
Per IS 1866:2017 / IEC 60422:2013: distribution transformers (11-33 kV) — annual test (breakdown voltage, water content, TAN); power transformers (66-220 kV) — six-monthly comprehensive testing plus annual dissolved gas analysis (DGA); EHV power transformers (400+ kV) — quarterly DGA + six-monthly comprehensive testing. Filtration / degassing treatment recommended when breakdown voltage drops below 30 kV or water content exceeds 30 ppm.
Yes — Balmerol 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.
Standard Balmerol transformer oil packaging: 50 L drums + 200 L barrels for distribution-transformer 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. State utilities can specify per their stores standard via the GeM rate contract.
Yes. Vasundhara Performance Solutions Pvt Ltd is the authorised Balmer Lawrie / Balmerol industrial lubricant distributor for Hyderabad, Telangana and Andhra Pradesh — including transformer oil supply for state utilities (DISCOMs + TRANSCOs), central utilities (PGCIL), generation utilities (NTPC, NHPC, NLC), Indian Railways, defence and industrial substation customers. Genuine Balmerol products with full manufacturer authorisation documentation. For our complete Balmer Lawrie portfolio, see our Balmer Lawrie brand page.
Complete Balmer Lawrie portfolio supplied by Vasundhara — single-vendor sourcing for PSU + state-utility procurement under GeM rate contract.
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