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One or more output windings connected to rectifier or inverter loads
- 6 – 36 pulse converter transformers
- K Rated
- Phase shifted multi-winding transformer
- Specialized design to control effect of harmonics and overload
- Available in Dry & Oil types
K-Rated Transformer Designs – Engineered to withstand harmonic heating caused by non-linear drive loads, preventing hot spots and premature insulation failure.
Multi-Pulse Transformer Options – Available in 6, 12, 18, 24, 30, 36, 48, and 54-pulse configurations to significantly reduce input harmonics and improve power factor.
Phase-Shifted Windings – Extended Delta/Star or custom phase-shift arrangements enable harmonic cancellation and support multi-pulse rectifier systems.
Reinforced Insulation Systems – Designed to resist voltage spikes, switching surges, and harmonic stress typical of VFD operations.
Electrostatic Shields – Provide additional attenuation of high-frequency noise and transients between primary and secondary windings.
Flexible Construction Options – Available in oil-immersed, Cast Resin (CRT), or VPI dry-type designs to match safety, environmental, and installation requirements.
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Specifications
| Parameter | Dry Type | Oil Type |
|---|---|---|
| Rating | Up to 20 MVA | Up to 60 MVA |
| Voltage Class | Up to 22 kV ( > 22kV) * | Up to 33 kV |
| Frequency | 50/60 Hz | 50/60 Hz |
| Cooling | AN/AF | ONAN/AF |
| Vector Group | As required | As required |
| Winding Material | Cu / Al | Cu / Al |
| Insulation Class | F/H/R | A |
| No. of Pulse | 6, 12, 24, 36 (> 36 ) * | 6, 12, 24, 36 (> 36 ) * |
(*– contact factory)
Technical Information
| Parameter | Value |
|---|---|
| Designed for one or more output windings connected to drive / rectifiers | |
|
Multi-pulse, multi-winding rectifier transformer for motor drive application |
|
|
Number of secondary windings can be 2,3,4,6, 9, 12, 15, 18 and 27 |
|
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Each secondary winding feeds a power cell containing 3-phase bridge rectifier |
|
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Mitigates effect of harmonics generated by MV / LV drives |
|
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Earth shield between HV & LV windings to avoid transfer of high frequency transients to HV/LV side |
|
| Supply segment | Industries |
| Drive OEMs |
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