Power Transformers Up to 100 MVA. Engineered for the Grid.
Custom-engineered power transformers up to 100 MVA, 132 kV class — designed in-house, tested in our own laboratory, and commissioned with full documentation for state utilities, IPPs, and large industrial consumers.
Bulk Power. Engineered to Specification.
KLR Power Transformers are designed and manufactured for the most demanding segment of the transformer market — bulk power transmission and step-up/step-down applications at grid scale. Every unit begins as a custom engineering project: our design team models each transformer in 3D SolidWorks, optimises the core and winding geometry for the specific load profile, and validates thermal performance before a single component is ordered.
The result is a power transformer with documented type-test credentials, low-loss core design, and full technical traceability — manufactured at our IDA Pashamylaram facility to both IS and IEC standards as applicable.
Technical Specifications
- Capacity range: Up to 100 MVA
- Voltage class: 220 / 132 / 110 / 115 / 66 / 33 / 11 / 6.6 kV
- Insulation System: Class A & Class B Oil-Impregnated Paper
- Cooling: ONAN / ONAF / OFAF / OFWF
- Tank Design: Conventional Radiator Type Tank with Conservator / Corrugated Tanks
- Standards: IS, IEC, ANSI, IEEE
- Winding Material: Electrolytic Grade Copper / Distribution Aluminium
- Winding Type: Disc / Helical / Continuous Disc / Interleaved Disc / Inter Shield / CTC
- Vector Group: Dyn11 / YNd1 / YNyn0 / YNd11 / Other Vector Groups on Request
- Insulation Levels (kVp): 75/ 95/ 170 / 325 / 550 / 650 / 950 kVp (As per Voltage Class and Applicable Standards)
- Tap Changer: Off-Circuit Tap Changer / On-Load Tap Changer (External / In Tank)
- Frequency: 50 Hz / 60 Hz
- Testing: Complete Routine Tests as per IS, IEC, ANSI, IEEE. Type Tests on request.
Optional Features
- Online DGA (Dissolved Gas Analysis) Monitoring
- Online Transformer Monitoring System
- Online PD
- Winding Temperature Indicator (WTI)
- Oil Temperature Indicator (OTI)
- Buchholz Relay
- Pressure Relief Device (PRD)
- Magnetic Oil Level Gauge (MOG)
- Marshalling Box with SCADA Interface
- Nitrogen Injection Fire Protection System
- Anti-Corrosive Paint System for Coastal Environments
- Stainless Steel Marshalling Kiosks and Hardware
- Fiber Optic Winding Temperature Monitoring
- Bushing Current Transformers (BCTs)
- Neutral Grounding Equipment
- Seismic Resistant Design
Applications
- State electricity boards and central transmission utilities
- Independent Power Producers (IPPs) — step-up from generation voltage
- Large industrial plants and captive power consumers
- EPC contractors for grid infrastructure projects
- Renewable energy grid interconnection (solar and wind evacuation)
- Railway traction substations
- Petrochemical, refinery, and heavy industrial consumers
Discuss Your Power Transformer Specification.
Share your MVA rating, voltage class, cooling requirement, and site conditions — our engineering team responds with a technical proposal.