WTG Transformers
MARSONS GREEN | 1 MVA – 6.3 MVA | IEC 60076-16 | India's Full Onshore Wind Fleet
MARSONS GREEN | 1 MVA – 6.3 MVA | IEC 60076-16 | India's Full Onshore Wind Fleet
Every wind turbine generates power at low voltage — typically 690 V to 1,200 V — which must be stepped up to medium voltage for collection and grid injection. The transformer that does this job is not a standard distribution transformer. IEC 60076-16 exists precisely because conventional transformers fail prematurely in wind applications. Marsons WTG Transformers are designed, tested, and delivered to this standard — covering every onshore wind turbine class currently operating or planned in India.
Each turbine start/stop cycle creates rapid heating and cooling. Standard transformers are rated for continuous duty only. Marsons WTG units use enhanced insulation materials and oil formulations engineered for cyclic thermal stress.
Vacuum Circuit Breakers generate high di/dt transients when disconnecting turbines. Marsons WTG designs include reinforced BIL and RC surge suppression capability.
Variable Speed Drives generate 5th, 7th, 11th, 13th order harmonic currents. Marsons WTG windings are K-factor derated to handle harmonic heating without insulation degradation.
Wind farm collector networks use daisy-chain ring-main topology. Marsons WTG units are rated and configured for loop-feed ring-bus operation with HV loop-feed bushings.
| Parameter | Value / Description |
|---|---|
| Rating Range | 1 MVA to 6.3 MVA (covers India's full onshore turbine fleet: 1.5 MW – 6.3 MW) |
| HV Voltage Class | Up to 33 kV (MV collector network side) |
| LV Winding Voltage | 690 V / 1,050 V / 1,200 V — matched to turbine generator output |
| Frequency | 50 Hz (India) | 60 Hz on request |
| Tap Changer | OCTC or OLTC (OLTC preferred for sites with wide grid voltage variation) |
| Cooling | ONAN / ONAF — compact design for tower-base or nacelle installation |
| Insulating Oil | Mineral Oil or Silicone Oil (silicone for environmentally sensitive / near-water sites) |
| Winding Material | Aluminium Foil / Copper Foil |
| Mounting | Tower-base pad-mounted | Nacelle-integrated (per turbine OEM requirement) |
| HV Terminal Arrangement | Loop-feed bushing configuration for ring-main daisy-chain collector topology |
| Impulse Withstand (BIL) | Enhanced BIL — reinforced for VCB switching surge protection |
| K-Factor Rating | K-7, K-13 per IEEE C57.110 for harmonic duty |
| Standards | IEC 60076-16 (primary standard) | IS 2026, IEC 60076 |
Harnessing wind power requires more than a standard distribution transformer. Marsons WTG Transformers bridge the critical gap between your turbine's generation and grid injection. Covering India's full onshore wind fleet from 1 MVA to 6.3 MVA, our engineered solutions provide the steadfast backbone your renewable energy projects demand.
| Turbine Model | Rating (MW) | Transformer LV Voltage | Transformer MVA |
|---|---|---|---|
| Suzlon S120 / S144 | Rating (MW)3 MW | Transformer LV Voltage690 V | Transformer MVA3.3 MVA / 3.6 MVA |
| Senvion 4.2M160 | Rating (MW)4.2 MW | Transformer LV Voltage690 V | Transformer MVA4.5 – 5.0 MVA |
| Siemens Gamesa SG 3.4 | Rating (MW)3.4 MW | Transformer LV Voltage345/230/13.8 kV | Transformer MVA3.6 – 4.0 MVA |
| Siemens Gamesa 5–6 MW | Rating (MW)5–6 MW | Transformer LV Voltage690 V / 1,050 V | Transformer MVA5.5 – 6.3 MVA |
| Adani Wind / Envision 5.2 MW+ | Rating (MW)5.2 MW+ | Transformer LV Voltage1,050 V / 1,200 V | Transformer MVA5.5 – 6.3 MVA |
| Vestas V120 / V150 | Rating (MW)2.0 – 2.2 MW | Transformer LV Voltage690 V | Transformer MVA2.2 – 2.5 MVA |
| Inox Wind 3 MW Series | Rating (MW)3 MW | Transformer LV Voltage690 V | Transformer MVA3.3 MVA |
| Custom / Other | Rating (MW)Any | Transformer LV VoltagePer turbine datasheet | Transformer MVAPer turbine datasheet |