Self-Extinguishing & Fire Safe
Contains zero flammable cooling oil. Constructed with flame-retardant epoxy resins and non-combustible insulating media, eliminating fire and explosion risks in populated commercial zones.
Engineering Authority & Expertise
Urja Techniques (India) Pvt. Ltd. is an ISO 9001:2015 certified manufacturer, supplier, and exporter of heavy-duty Dry Type Transformers headquartered in Mumbai, India. Established in 1991, we possess over 30 years of specialized manufacturing experience delivering precision-engineered power distribution solutions to over 40 countries worldwide.
Designed strictly to international standards including IEC 60076-11, IS 11171, and IS 2026, our Cast Resin Transformers (CRT) and Vacuum Pressure Impregnated (VPI) Dry Type Transformers deliver maximum thermal durability, fire safety, and low partial discharge (<10 pC). Fully type-tested by premier independent testing laboratories CPRI (Central Power Research Institute) and ERDA (Electrical Research and Development Association), our transformers serve critical infrastructure, high-rise buildings, underground mining, data centers, and industrial utility grids globally.
Standard Product Parameters
Technical Specifications & Engineering Ratings
Comprehensive technical parameters configured to fulfill rigorous international EPC procurement standards and utility operational mandates.
| Parameter / Specification | Standard Technical Range | Compliance & Custom Options |
|---|---|---|
| Power Capacity Range | 15 kVA up to 3.15 MVA (3150 kVA) | Custom rating engineered upon client requirement |
| Primary / HT Voltage Class | 3.3 kV, 6.6 kV, 11 kV, 22 kV, 33 kV | 50 Hz / 60 Hz dual frequency compatible |
| Secondary / LT Voltage Class | 415 V, 433 V, 690 V (Step-down) | Custom low-tension outputs available |
| Insulation Class | Class F (155°C) / Class H (180°C) | High-grade non-hygroscopic insulation materials |
| Cooling Mechanism | Air Natural (AN) / Air Forced (AF) | Optional temperature controller with PT100 sensors |
| Tap Changer Options | Off-Circuit Tap Changer (OCTC: +5% to -10%) | On-Load Tap Changer (OLTC: 9 or 17 steps available) |
| Vector Group & Phase | Dyn-11 / 3-Phase Continuous Duty | Other vector configurations upon request |
| Winding Conductor Material | High-Conductivity Electrolytic Copper / Aluminum | Foil winding or disc winding core structure |
| Degree of Protection (Enclosure) | IP00 (Unenclosed), IP21, IP23, IP33 to IP54 | CRCA sheet steel enclosure with powder coating |
| Design & Testing Standards | IEC 60076-11, IS 11171, IS 2026, BIS Certified | CPRI & ERDA Type Tested for Short-Circuit Strength |
Performance & Reliability
Key Advantages of Urja Dry Type Transformers
Engineered for extreme environmental conditions, severe mechanical stresses, and maximum fire safety in urban and industrial installations.
Low Partial Discharge (< 10 pC)
Advanced vacuum pressure impregnation and computerized resin casting ensure void-free insulation structures, resulting in exceptional partial discharge levels for long operational lifespans.
High Short-Circuit Resistance
Mechanically reinforced core and winding designs withstand severe dynamic electromagnetic stresses during grid fault conditions, verified through CPRI dynamic short-circuit endurance tests.
Minimal Maintenance & Eco-Friendly
No oil sampling, gas analysis, or liquid disposal required. Operationally maintenance-free design reduces total cost of ownership (TCO) and prevents environmental soil or groundwater pollution.
Moisture & Corrosion Resistant
Non-hygroscopic insulation prevents humidity absorption during shutdown periods, ensuring immediate restart capability even in high-humidity tropical or offshore marine environments.
High Impulse Voltage Withstand
Engineered to absorb severe lightning surges and switching transient overvoltages, safeguarding continuous power distribution in heavy industrial plants and utility networks.
Product Range Breakdown
Featured Dry Type Transformer Models
Explore our core dry type transformer variants optimized for industrial power, commercial buildings, and special converter applications.
Dry Type VPI Transformer
MOQ: 1 Unit | Custom Options- Power Rating: Up to 3.5 MVA / 33 kV
- Cooling: Air Natural (AN) / Air Forced (AF)
- Winding: High-Grade Copper Foil / Wire
- Efficiency: 99.9% Peak Operating Efficiency
- Impregnation: High-vacuum polyester varnish
Ideal for indoor substations, high-rise buildings, and underground metro networks.
Cast Resin Dry Type Transformer (CRT)
MOQ: 1 Unit | IEC 60076-11- Power Capacity: 100 kVA to 2500 kVA
- Primary Voltage: 11 kV / 22 kV / 33 kV
- Encapsulation: Epoxy Resin Encapsulated Core
- Operating Temp: -25°C to +120°C Thermal Rating
- Enclosure Rating: IP21 / IP23 CRCA Steel Protection
Superior mechanical strength for chemical plants, offshore platforms, and data centers.
Iron Core Dry Type Transformer
MOQ: 1 Unit | Low Loss Core- Coil Structure: Layer / Disc Winding
- Loss Optimization: Built to IS 1180 Energy Levels
- Frequency: 50 Hz / 60 Hz Universal Operation
- Low Noise: Acoustic noise dampened core clamping
- Application: Commercial Complexes & Industrial Utilities
High-performance step-down power distribution for utility grid integration.
Dry Type Distribution Transformer
MOQ: 1 Unit | BIS Certified- Capacity Range: 100 kVA to 2500 kVA
- Voltage Output: 433V / 690V Standard Output
- Standard Compliance: IS 1180, IEC 60076, BIS
- Thermal Protection: Multi-channel temperature scanner
- Customization: Fitted with LT/HT Cable Boxes
Reliable distribution transformer for hospitals, airports, and renewable energy plants.
Target Deployment
Global Industrial & Commercial Applications
Urja Dry Type Transformers are trusted across mission-critical sectors where operational continuity and zero fire hazard are paramount.
Commercial High-Rises & Malls
Compact footprint and fire-safe construction allow safe placement inside basement substations or upper utility floors of commercial towers.
Data Centers & IT Parks
Low total losses and continuous heavy-load reliability deliver uninterrupted power to mission-critical server installations and telecom hubs.
Underground Mining & Tunnels
Explosion-proof design and moisture-sealed windings ensure safe operation in hazardous underground environments and dark mining shafts.
Hospitals & Healthcare Facilities
Low acoustic noise levels and complete elimination of toxic liquid leaks protect sensitive medical equipment and patient safety.
Metros, Railways & Airports
High dynamic short-circuit withstand capabilities handle rapid traction load fluctuations and severe power switching spikes.
Solar & Renewable Energy Plants
Specialized step-up converter duty dry transformers integrated seamlessly with grid-tied inverter systems and battery storage banks.
Request Technical Specifications & B2B Export Quotation
Consult with our transformer engineering specialists for custom technical designs, CPRI type test reports, or international project bidding assistance.
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