When fire safety, zero oil, and indoor reliability matter most — a Cast Resin Transformer is the only right choice.
Tirupati Transformers Pvt. Ltd. manufactures Cast Resin Dry Type Transformers from 100 KVA to 5000 KVA at our state-of-the-art plant in Greater Noida, Uttar Pradesh — fully compliant with IEC 60076-11 and tested 100% before dispatch.
10+ years. Hundreds of projects. Zero oil. Zero compromise.
A Cast Resin Transformer is a dry type transformer where both primary and secondary windings are fully encapsulated in high-grade epoxy resin under vacuum and pressure conditions.
This encapsulation removes the need for oil entirely. The result is a 100% fire-safe, moisture-proof, and maintenance-free transformer — built for locations where safety cannot be compromised.
Unlike oil-cooled transformers, a Cast Resin Dry Type Transformer needs no Buchholz relay, no conservator tank, no oil filtration, and no oil testing. Operating cost drops sharply across its 25+ year lifespan.
It complies with IEC 60076-11 — the international benchmark standard for dry type cast resin transformers set by the International Electrotechnical Commission.
Not all transformers are equal. Here is why engineers and project managers across India choose a Cast Coil Transformer over oil-filled alternatives:
Zero fire risk — epoxy resin is self-extinguishing. No oil means no fuel for fire, making it the only acceptable choice for metro stations, hospitals, and high-rise towers.
No oil, no leaks — eliminates contamination risk in food processing plants, pharmaceutical units, and water treatment facilities.
Works in extreme humidity — the sealed epoxy shell blocks moisture completely, unlike VPI or open-wound dry type units. Ideal for coastal projects and underground installations.
Silent operation — low noise levels suit IT parks, data centres, and commercial office buildings where noise pollution is a concern.
Longer service life — epoxy encapsulation protects windings from mechanical stress, vibration, and chemical attack. Our cast resin transformer supplier India regularly deliver 25–30 years of service.
Faster ROI — zero oil maintenance cost, zero Buchholz relay replacement, zero insurance surcharge for fire risk. The savings compound every year.
Every three phase cast resin dry type transformer manufactured at our ISO 9001:2015 certified Greater Noida facility is built to perform in the harshest industrial conditions.
Vacuum Pressure Epoxy Encapsulation — zero voids, complete dielectric strength, superior moisture protection through the full winding depth.
Class F and Class H Insulation — our Cast Resin Transformers are available with F-class (155°C) and H-class (180°C) insulation. NOMEX insulation is available for extreme temperature applications.
Compared to our VPI Transformer, the cast resin variant offers superior sealing and is preferred for critical indoor applications.
IP00 to IP54 Enclosure — from open ventilated to dust and splash protected. Custom IP ratings available for offshore and chemical plant installations.
Custom Vector Groups — Dyn11, Yyn0, or any configuration as per your project specification.
On-Load Tap Changer (OLTC) Ready — voltage regulation under load, essential for grid-connected renewable energy projects.
Pre-Dispatch FAT Testing — every cast resin dry type transformer price India leaves our factory with a complete factory acceptance test report as per IEC and IS standards.
Underground metro stations cannot use oil-filled transformers due to fire tunnel regulations. Our Cast Resin Transformer units are the standard choice for Delhi Metro, Mumbai Metro, and all major Indian urban rail projects.
A power interruption in an OT or ICU is life-threatening. Our Cast Resin Transformer provides clean, uninterrupted, fire-safe power for hospitals, pharmaceutical GMP plants, and diagnostic centres across India.
For lower-capacity hospital buildings, our Distribution Transformer range is also fire-safe and IEC compliant.
Data centres demand 99.999% uptime. A Cast Resin Transformer eliminates oil fire risk in server rooms and supports continuous load cycles without derating — ideal for Tier III and Tier IV data centre specifications.
India’s renewable energy targets demand transformers that handle variable loads and partial discharge from inverters. Our Cast Resin Transformer units are engineered for solar farm step-up and wind turbine pad-mount applications. See our dedicated Solar Inverter Duty Transformer for inverter-compatible ratings.
India’s Smart City Mission mandates fire-safe, low-maintenance electrical infrastructure. Our cast resin dry type transformer Manufacturer India are actively deployed in smart city substations, defence installations, and government PSU projects across 15+ Indian states.
NFPA 130 and NBC India building codes increasingly require oil-free transformers above a certain floor height. A cast resin dry type transformer is now the default specification for commercial towers in Mumbai, Hyderabad, and Bengaluru.
Direct Manufacturer — no distributor, no middleman. Every cast resin dry type transformer is manufactured, tested, and dispatched directly from our Greater Noida plant to your project site.
10+ Years of Manufacturing Excellence — hundreds of cast resin dry type transformer India delivered to metro projects, hospitals, data centres, and industrial plants across India.
ISO 9001:2015 Certified Facility — quality management built into every process from raw material procurement to final FAT testing.
IEC 60076-11 Full Compliance — accepted by all major Indian PSUs, EPC contractors, and international project consultants. Refer to the IEC standards database for technical benchmarks.
Pan-India Delivery — Delhi NCR, Mumbai, Chennai, Kolkata, Hyderabad, Ahmedabad — and all states with on-time delivery commitment.
Custom Engineering — from NOMEX insulation to special IP enclosures, we engineer each cast resin dry type transformer to exact project specifications without MOQ restrictions.
Indian building codes (NBC 2016) and metro rail fire safety regulations mandate oil-free transformers in underground stations, hospitals above 15 metres, and enclosed commercial buildings above 30 metres. A cast resin dry type transformer is the only compliant solution for these locations. Projects funded by World Bank or ADB also typically specify IEC 60076-11 compliant cast resin units.
A properly maintained cast resin dry type transformer lasts 25 to 35 years. Epoxy encapsulation protects the windings from moisture, vibration, chemicals, and partial discharge far more effectively than oil-insulated or VPI transformers. Tirupati units installed in metro projects over 12 years ago are still operating without rewinding.
The price of a cast resin dry type transformer in India depends on kVA rating, voltage class, insulation type (F/H/NOMEX), IP enclosure, and tap changer requirement. A standard 500 kVA, 11kV unit typically ranges differently from a custom 2500 kVA OLTC unit. Contact Tirupati for a transparent, itemised quotation directly from the manufacturer — no hidden charges.
Yes. A cast resin dry type transformer handles the variable frequency and harmonic-rich output from solar inverters and wind turbines very effectively due to its superior insulation system. Tirupati manufactures inverter-duty rated cast resin dry type transformer units specifically designed for solar parks, with K-factor ratings and partial discharge levels optimised for PV applications.
A cast resin dry type transformer uses high-pressure epoxy encapsulation — the windings are fully sealed in solid resin with zero voids. A VPI (Vacuum Pressure Impregnated) transformer uses varnish impregnation, which offers less mechanical strength and lower moisture resistance. Cast resin is the premium choice for critical, harsh-environment, and fire-sensitive applications. VPI suits standard indoor industrial applications where budget is a priority.
Optional Fittings
| Brand | Tirupati Transformers |
| RATINGS | Upto 5 MVA |
| Voltage class | Upto 33 KV |
| Applicable Standards | IS 11171, IEC60726 |
| Duty Type | Outdoor/Indoor, Ground Mounted Type & Pole Mounted Type |
| No of Phases | Three Phase |
| Frequency | 50 HZ |
| Vector Group | Drn11 |
| Winding material | Copper / Aluminium |
| Tap Changer | Off circuit or On load Tap Changers as per customer spec. |
| Class of Insulation | F, H class as required and Class A |
| Insulation Material | Nomex, Silicon Varnish, Fiber Glass, Glass Epoxy |
| Temperature Rise | 650 C to 1150 C above ambient temperature of 500C by resistance method or as per customer’s requirement |
| Enclosure Painting | Powder Coated with RAL 7032 shade as per customer requirement. |