Reactor Transformers

Heavy-Duty Industrial Reactor Transformers

Urja Techniques (India) Pvt. Ltd. designs and manufactures high-performance, oil-immersed multiphase Reactor Transformers up to 33kV / 2 MVA capacity. Engineered specifically for AC power distribution networks, industrial drives, and sub-station applications, our reactor transformers effectively limit overvoltage surges, suppress harmful harmonic currents, and ensure optimal reactive power compensation across demanding utility and industrial environments.

As an established electrical equipment manufacturer since 1991, Urja Techniques engineers reactor transformers to withstand extreme electrodynamic forces, thermal overloads, and high-frequency voltage harmonics. Designed in strict compliance with IEC 60076, IS 2026, and IS 5553 standards, our units are deployed globally by utility providers, steel mills, mining operations, and renewable energy plants.

Key Engineering Features & Design Integrity

• Low-Loss CRGO Core: Manufactured using high-permeability Cold Rolled Grain Oriented (CRGO) silicon steel laminations with step-lap mitred joints, minimizing hysteresis losses, eddy currents, and noise.
• Electrolytic Copper Windings: Double-winding construction with paper-insulated 99.99% pure electrolytic copper strip, delivering exceptional short-circuit withstand strength and thermal stability.
• Efficient ONAN/AN Thermal Management: Features robust external radiator panels and high-grade dielectric transformer oil for natural oil and air thermal circulation, maintaining safe internal temperature limits during continuous operation.
• Weatherproof & Corrosion-Resistant Tank: Fabricated with heavy-duty structural steel, shot-blasted, and coated with multi-layer polyurethane paint for IP55 outdoor durability in harsh tropical, desert, or marine environments.
• CPRI & ERDA Type Tested: Fully certified by independent testing authorities (CPRI & ERDA) for impulse voltage, short-circuit endurance, temperature rise, and acoustic noise level compliance.

Power Distribution & Utility Grids

Installed in AC substations to suppress overvoltage conditions, stabilize busbar voltages, and control line charging currents in long transmission lines.

Renewable Energy (Solar & Wind)

Utilized in solar PV substations and wind energy facilities for harmonic filtering and grid-code interconnection compliance.

Steel Mills & Heavy Manufacturing

Protects electric arc furnaces, rolling mills, and heavy equipment against severe short-circuit currents and inductive load fluctuations.

Converters & Variable Frequency Drives

Connected alongside industrial rectifier drives and thyristor converters to attenuate high-frequency harmonics and protect power electronics.

Q: How does the ONAN cooling system enhance the reliability of reactor transformers?

A: The ONAN (Oil Natural Air Natural) cooling system uses natural oil convection inside the transformer tank and air movement over external cooling radiators. Eliminating forced mechanical fans or pumps lowers maintenance demands, reduces operating noise, and enhances equipment reliability during continuous full-load duty.

Q: Why are CRGO silicon steel and electrolytic copper essential for reactor transformer construction?

A: Cold Rolled Grain Oriented (CRGO) silicon steel exhibits superior magnetic permeability, minimizing core hysteresis losses and heat generation. Electrolytic grade copper (99.99% purity) provides low electrical resistance and high mechanical strength, enabling windings to withstand severe short-circuit electromagnetic stresses.

Q: Can Urja Techniques manufacture custom reactor transformers for specialized voltage and frequency requirements?

A: Yes. Beyond our standard ratings up to 33 kV and 2 MVA, our in-house R&D engineering team custom-designs reactance values, vector configurations, insulation levels, and enclosure dimensions to conform to specific overseas utility standards and project requirements.

Q: What independent type tests and quality certifications accompany your transformers?

A: All units comply with IEC 60076, IS 2026, and IS 5553 standards. Urja Techniques' transformers are type-tested by independent accredited bodies—including CPRI (Central Power Research Institute) and ERDA—for short-circuit withstand, impulse voltage resistance, and temperature rise.

Q: What is the delivery time and export packaging standard for international orders?

A: Standard manufacturing delivery is 2 to 4 weeks. International shipments are packed in heavy-duty seaworthy wooden crates with vapor barrier protection and rigid steel framing to ensure secure ocean or air freight transportation worldwide.