Heavy-Duty AC Transformers for Global Procurement
Urja Techniques (India) Pvt. Ltd. is an ISO 9001:2015 certified manufacturer and exporter of heavy-duty AC Transformers and industrial power distribution equipment. Serving EPC contractors, state utilities, and global industrial clients across 40+ countries since 1991, our AC transformers are engineered to withstand demanding operational conditions, frequent short circuits, and extreme ambient thermal variations.
Designed in compliance with international standards including IEC 60076 and IS 2026, our AC transformer series features high-grade electrolytic copper, prime CRGO steel cores with step-lap lamination, and advanced insulation systems. All units undergo stringent type-testing at premier laboratories such as CPRI and ERDA to ensure maximum efficiency (up to 99.9%), minimal losses, and extended operational longevity.
Low Losses & High Efficiency
Utilizes prime grade CRGO core steel with step-lap geometry to minimize no-load losses and optimize operating economy.
Short-Circuit Withstand
Mechanically reinforced coil clamping and rigid core structures ensure high short-circuit withstand capacity under severe network faults.
Certified Quality Compliance
Full conformance to IEC 60076, IS 2026, and IS 1180 standards with accredited impulse voltage and temperature rise testing.
Advanced Thermal Management
Designed with ONAN/ONAF cooling configurations for superior thermal dissipation across broad temperature operating ranges (-25°C to +55°C).
Corrosion Resistant Finish
Finished with multi-stage shot blasting and high-durability powder coating or polyurethane paint for harsh outdoor coastal and industrial atmospheres.
Custom Engineering Scope
Tailor-made designs available with On-Load Tap Changers (OLTC), CSP protection, and corrugated hermetically sealed tanks.
AC Transformer Product Range
Explore our technical offerings in industrial power transformers, step-up units, custom special transformers, and OLTC regulated distribution transformers.
High Voltage Power Transformer
Heavy-duty high voltage power transformer engineered for utility power distribution networks and large industrial sub-stations up to 160 MVA / 220 kV.
| Capacity Range | Up to 160 MVA (160,000 kVA) |
| Rated Voltage | Up to 220 kV (110 kV / 132 kV / 220 kV) |
| Winding Material | Electrolytic Copper |
| Cooling System | ONAN / ONAF |
| Efficiency Rate | 99.9% at Rated Load |
| Standards Compliance | IS 2026 / IEC 60076 |
High Voltage Step-Up Transformer
Step-up high voltage transformer built for power transmission line matching, research laboratories, and specialized industrial step-up voltage requirement.
| Capacity Range | 2 kVA to 1000 kVA |
| Primary/Secondary Voltage | 220V/415V Primary; Up to 1000 kV Secondary |
| Phase Configuration | Single Phase / Three Phase |
| Coil Structure | Layer / Sandwich Winding |
| Frequency | 50 Hz / 60 Hz |
| Load Loss | < 1.8% at Rated Load |
Special Purpose Transformer
Custom-built industrial transformers designed for complex load profiles, non-standard voltage outputs, and demanding operational environments.
| Capacity Scope | Custom Built (1 kVA to 5000 kVA) |
| Voltage Range | Up to 33 kV High Voltage / 433 V Low Voltage |
| Conductor Type | High-Conductivity Copper / Aluminium |
| Cooling Options | ONAN, ONAF, Dry Type, Water Cooled |
| Operating Temperature | -20°C to +60°C Ambient |
| Application | Industrial Process & Special Duty |
OLTC Distribution Transformer
Distribution transformer integrated with On-Load Tap Changer (OLTC) for seamless, automated step voltage regulation without power interruption.
| Capacity Range | 100 kVA to 2500 kVA |
| Voltage Rating | 11 kV High Voltage / 433 V Low Voltage |
| Tap Control | Automatic On-Load Tap Changer (OLTC) |
| Conductor Material | Electrolytic Grade Copper Winding |
| Standards | IS 1180 (Part-1) / IEC 60076 |
| Efficiency Class | Energy Efficient Design (>99.9%) |
Standard AC Transformer Technical Matrix
Detailed engineering parameter comparison across standard AC transformer models manufactured by Urja Techniques India.
| Parameter | High Voltage Power | Step-Up HV Unit | Special Purpose | OLTC Distribution |
|---|---|---|---|---|
| Power Capacity | Up to 160 MVA | 2 kVA - 1000 kVA | 1 kVA - 5000 kVA | 100 kVA - 2500 kVA |
| Voltage Rating (HV) | 110 kV / 132 kV / 220 kV | Up to 1000 kV | Up to 33 kV | 11 kV / 33 kV |
| Voltage Control | OLTC / Off-Circuit Switch | Manual / Automatic Booster | Custom Tap Switch | On-Load Tap Changer (OLTC) |
| Winding Conductor | Electrolytic Copper | Copper / Aluminium | Copper / Aluminium | Electrolytic Copper |
| Cooling Method | ONAN / ONAF | ONAN / ONAF | ONAN / Dry / Liquid | ONAN |
| Design Standards | IEC 60076 / IS 2026 | IEC 60076 / IS 2026 | IEC 60076 / Custom | IS 1180 / IEC 60076 |
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