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Robust design and sturdy construction to competently handle short circuits
High Capacity & Voltage Range – Supports large power blocks for utility and industrial systems.
Advanced Cooling Options – ONAN, ONAF, OFAF, OFWF, KNAN, and KNAF configurations ensure stable thermal performance under varying loads.
Multiple Dielectric Fluid Choices – Mineral oil for thermal efficiency; ester fluids for fire safety and environmental compliance; silicone fluids for high-temperature applications.
Global Standards Compliance – Designed as per IS 2026, IEC 60076, and ANSI/IEEE C57 for mechanical strength, insulation reliability, and operational safety.
Short-Circuit Proven Design – Validated by a 31.5 MVA, 132 kV short-circuit tested transformer, demonstrating high mechanical and fault-withstand capability.
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Email Us transformers@raychemrpg.com
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Specifications
| Parameter | Value |
|---|---|
| Rating | Three Phase up to 60 MVA |
| Frequency | 50 Hz, 60 Hz |
| Cooling | ONAN / ONAF / OFWF |
| Vector Group | As per customer specifications |
| Winding Material | Cu or Al |
| Insulating Medium | Mineral Oil Ester Fluid or Silicon Oil as per customer specification |
| Primary Voltage | Upto 145 kV |
| Secondary Voltage | 66kV, 33kV, 11 kV, 6.6kV (other Voltages as required) |
| Tap Range | Off circuit or On-load tap changers for HV / LV variation as per customer specification |
| Impedance | In line with applicable standards / customer specification |
| Applicable Standards | IS, IEC, ANSI, IEEE, EN, etc. |
Installation ManualTechnical Information
| Parameter |
|---|
| Contra-shield winding for uniform voltage distribution |
| Winding construction available with Continuously transposed conductor |
| Impulse testing available upto 800kV, 40 kJ suitable for 145 kV class transformers |
| Special accessories like maintaince free breather,RIP/RIS/OIP/Plug-in bushing |
| OLTC with ETIOS,TMCTS,Bushing monitoring system,FOS,PD measurement,Online DGA |
| Online filteration system,Thermosyphon filter |
| Power transformer with tertiary winding loaded/unloaded & with multiple voltage on HV side (11-60,132-110,66-33kV) |
Fittings |
|
|---|---|
| Standard fittings | Optional Fittings |
| Primary bushings (OIP / RIP/RIS/plug-in) | RTCC panel |
| Accessories (OTI/WTI/MOG/Buchholz relay/PRV) | Automatic voltage regulator (AVR) |
| Off circuit / On-load tap changer | PD monitoring system |
| Silica gel breather | Online dissolved gas analyzer (DGA) |
| Top & bottom drain/filter valve,Sampling valve | Nitrogen injection fire protection system (NIFPS) |
| Pris. Oil level gauge | Aircell in Oil conservator |
| Rating & diagram,valve schedule plate | Aircell rupturing relay |
| Lifting & lashing lug, toeing hole | Impact recorder |
| Skid base / roller arrangement | Smart breather |
| Provision for NIFPS system | Sudden Pressure Relay |
| Terminal connector for primary bushing | Oil filter unit for OLTC/Tank |
| Cooler control box | Thermosyphon Filter |
| FOS,TMCTS | |
| Surge Arrester | |
Supply Segments |
|---|
| Substations for industry |
| Renewable energy |
| Utilities |
| EPC projects |
| Refinieries |
| Private sector |
| Data centers |
| Coal mines |
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