Dry Type Electrical Transformers — Manufacturer, Supplier & Exporter

What Are Dry Type Electrical Transformers?

Dry type electrical transformers use air as a cooling medium instead of oil. There is no liquid insulation, no oil tank, and no risk of leakage or fire from flammable fluid.

They are the safest choice for hospitals, schools, malls, metro stations, data centers, and high-rise buildings where oil-filled units are restricted by fire safety codes. Both types are manufactured per dry type transformer safety standards IEC 60076-11, the global benchmark for air-cooled transformer quality.

Two main variants exist — Cast Resin and VPI (Vacuum Pressure Impregnated) — each suited for different environments and load requirements.

Tirupati — Leading Dry Type Electrical Transformers Manufacturer in India

Tirupati Transformers Pvt. Ltd. is an ISO-certified, 10+ year experienced manufacturer of dry type electrical transformer India supplying clients across India and 50+ countries globally.

We build every unit from scratch at our factory — no outsourcing, no assembly from imported parts. Every dry type electrical transformer carries our quality stamp and full IEC test certification.

Our clients include power utilities, metro rail projects, IT parks, hospitals, defence establishments, and renewable energy developers across India, UAE, Africa, and Southeast Asia.

Types of Dry Type Electrical Transformers We Manufacture

Cast Resin Transformer

Our cast resin transformer encapsulates the entire winding inside epoxy resin under vacuum pressure. The result is a zero-maintenance, fire-resistant, moisture-proof unit built for the toughest indoor environments.

Best for: metro rail, hospitals, airports, data centers, chemical plants, and coastal high-humidity areas.

• Capacity: 100 KVA to 10 MVA
• Voltage: Up to 36KV
• Insulation Class: F / H
• Fire Class: F1 — Self Extinguishing
• Cooling: AN / AF
• Protection: IP00 to IP65
• Standard: IEC 60076-11

VPI Transformer (Vacuum Pressure Impregnated)

Our VPI transformer uses vacuum pressure impregnation with varnish to seal the windings. It offers excellent dielectric strength, thermal stability, and resistance to vibration — at a more economical price than cast resin.

Best for: industrial plants, pumping stations, utility substations, and dry climate installations.

• Capacity: Up to 5 MVA
• Cooling: AN / AF
• Winding: Copper / Aluminium
• Standard: IEC 60076, IS 11171

Solar Inverter Duty Dry Type Transformer

Renewable energy projects demand harmonic-tolerant dry type transformers manufacturer india that handle inverter output without overheating. Our solar inverter duty units are designed for India’s booming rooftop solar, ground-mount solar, and hybrid energy projects.

Converter Duty Dry Type Transformer

Used in variable frequency drives (VFDs), rectifiers, and industrial converters — our converter duty dry type electrical transformer are built to handle non-sinusoidal waveforms and high harmonic content without insulation degradation.

Key Features of Our Dry Type Electrical Transformer

Every dry type electrical transformer from Tirupati is engineered with these performance advantages:

• Zero Oil — no fire risk, no leakage, no Buchholz relay needed
• Self-Extinguishing Resin — F1 fire class, safe for public buildings
• Pure Copper Winding — lower losses, higher efficiency, longer lifespan
• Low Noise Operation — below 60 dB, ideal for hospitals and offices
• Compact & Lightweight — fits easily in electrical rooms and basements
• Tropical Climate Ready — withstands humidity, dust, and temperature extremes
• 100% Continuous Duty — non-stop industrial and commercial operation
• Custom Enclosures IP00–IP65 — indoor and outdoor variants available
• IEC 60076-11 & IS 11171 Certified — nationally and internationally accepted.

Our dry type electrical transformer comply with IS 11171 dry type transformer Indian standard — mandatory for government and PSU projects in India.

Where Are Dry Type Electrical Transformer Used?

Metro Rail & Airports: Delhi Metro, Mumbai Metro, and airport terminals mandate dry type electrical transformer for traction substations and terminal power distribution — zero fire risk in crowded public spaces.

Hospitals & Healthcare: Uninterrupted, noise-free power is critical. Cast resin dry type electrical transformer run silently and safely inside electrical rooms adjacent to patient wards and OT blocks.

IT Parks & Data Centers: Sensitive equipment demands stable, clean power. Our dry type electrical transformer provide zero-contamination power with no oil vapour in precision-cooled server rooms.

Renewable Energy Plants: Solar farms and wind energy projects across Rajasthan, Gujarat, and Tamil Nadu use our dry type electrical transformer for inverter-to-grid step-up connections. The India renewable energy transformer demand is growing rapidly as solar and wind capacity crosses 200 GW nationwide.

Defence & Government Projects: Indian armed forces and government buildings specify IS 11171-compliant dry type electrical transformers for permanent installations in sensitive facilities.

How to Order Dry Type Electrical Transformers From Tirupati

1. Share Your Requirement: Send KVA rating, voltage ratio, cooling type, IP class, installation type (indoor/outdoor), and delivery location.
2. Get Free Quote in 24 Hours: Our engineers send full pricing, IEC datasheet, and delivery timeline same day. get free transformer quote
3. Order Confirmation: Pay 30–50% advance. Production starts immediately at our factory.
4. Factory Testing: Every dry type electrical transformer is tested per IEC 60076-11. Third-party inspection available on request.
5. Dispatch & Delivery: We deliver PAN India and export worldwide. Full documentation included.

Frequently Asked Questions — Dry Type Electrical Transformers

What is the difference between dry type and oil-filled transformers?

Dry type electrical transformers use air for cooling — no oil, no fire risk, no leakage. Oil-filled transformers use mineral oil which poses fire and environmental hazards. Dry type units are mandatory for indoor locations like malls, hospitals, metros, and data centers. Oil-filled units are typically used outdoors in open substations and rural grid networks.

Which standard applies to dry type electrical transformers in India?

In India, IS 11171 governs the manufacturing of dry type electrical transformers for domestic projects. For export and international projects, IEC 60076-11 is the applicable standard. Tirupati manufactures to both standards and provides full compliance certificates with every order.

What is the price of a dry type electrical transformer in India?

The price of dry type electrical transformers depends on KVA rating, voltage class, insulation type (cast resin or VPI), and enclosure protection level. A 100 KVA cast resin transformer typically ranges from ₹1.8 lakh to ₹3.5 lakh ex-works. Contact us with your exact specifications for a firm quotation within 24 hours.

Are dry type electrical transformers suitable for outdoor installation?

Yes. With IP54 to IP65 enclosures, our dry type electrical transformers can be installed outdoors. Cast resin units with weatherproof enclosures are used for outdoor substations, rooftop solar installations, and industrial yard setups. They withstand rain, dust, UV exposure, and temperature variations from -25°C to +50°C.

Do dry type electrical transformers require regular maintenance?

Cast resin dry type electrical transformers are virtually maintenance-free. No oil testing, no oil filtration, no Buchholz relay checks. Routine inspection includes: cleaning of enclosure vents, checking terminal connections, and monitoring temperature via built-in PT100 sensors. Annual inspection is sufficient — significantly reducing lifecycle costs compared to oil-filled units.

Get Your Dry Type Electrical Transformers — Free Quote in 24 Hours

India’s most trusted dry type electrical transformers manufacturer is ready to serve your project.

• Measurement of winding resistance
• Measurement of voltage ratio and check of polarity and vector group
• Measurement of impedance voltages
• Measurement of load losses
• Measurement of no load losses and no load current
• Measurement of harmonics induced overvoltage withstand test
• Separate source voltage-withstand tests on HV and LV windings
• Bushing routine tests
• Oil Leakage Test
• Relief Device Test
• Dielectric Routine Tests
• Galvanizing Tests
• Magnetic Balance Tests
• Induced over voltage withstand Tests
• Tap changer Tests
• Oil Tests.

• Oil Temperature Indicator (OTI)
• Winding Temperature Indicator (WTI)
• Magnetic Oil-level Gauge (MOG)
• Pressure Relief Device (PRD)
• Marshalling Box
• Forced Fan Cooling
• OLTC & RTCC Panel with AVR
• Bi-directional Rollers
• Radiator Valves
• Dehydrating Breather
• Current Transformer
• Additional Neutral Terminal.