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Traction Transformer
Suitable for
AC locomotives
Electric locomotives draw traction power from the 25 kV overhead catenary (OHE) line. The traction transformer steps down the 25 kV supply into various output voltages required to power the traction motors, auxiliary motors and the hotel load of passenger coaches. The configuration and power rating of the traction transformer are determined by the specific type and model of the locomotive.
Manufactured by Stesalit Ltd, an associate company – www.stesalitltd.com
Transformer 5400 kVA
Suitable for
AC locomotives with DC propulsion
- Breather with silica gel
- Oil & air flow monitoring
- Input frequency: 50 Hz ±3%
- Forced oil and forced air cooled
- No. of traction windings: Two
- Safety valve in oil conservator
- Output voltage control: 32 steps
- Output current: 2700A per winding
- Output voltage: 1000V at 22.5 kV Input
- Auxiliary output: 830V (415+415), 325A
- Insulation: Class A (105°C) with mineral oil
- % Impedance voltage at 32 tap: 10% typical
- Input supply: 22.5 kV nominal, 17.5 kV to 30 kV
Transformer 6531 kVA
Suitable for
AC locomotives with AC propulsion
- Underslung mounted
- Breather with silica gel
- Oil & air flow monitoring
- Input frequency: 50 Hz ± 3%
- Forced oil and forced air cooled
- No. of traction windings: Four
- Safety valve for transformer
- Output current (traction): 1142A per winding
- Input supply: 22.5 kV nominal, 17.5 kV to 30 kV
- Output voltage (traction): 1269V at 25 kV input
- Auxiliary output 1 (BUR): 1000V, 334A at 25 kV input
- Auxiliary output 2 (filter): 1154V, 347A at 25 kV input
- Aluminium alloy transformer body & conservator tank
Transformer 7775 kVA
Suitable for
AC locomotives with AC propulsion
- Robust construction
- Underslung mounted
- Breather with silica gel
- Oil & air flow monitoring
- Input frequency: 50 Hz ± 3%
- Forced oil and forced air cooled
- Safety valve for transformer
- No. of traction windings: Four
- Output current (traction): 1142A per winding
- Input supply: 22.5 kV nominal, 17.5 kV to 30 kV
- Output voltage (traction): 1269V at 25 kV input
- Auxiliary output 1 (BUR): 1000V, 334A at 25 kV input
- Auxiliary output 2 (Filter): 1154V, 347A at 25 kV input
- Aluminium alloy transformer body & conservator tank
- Hotel load winding: Two nos., 960V/648A at 25 kV input
Certification(s)
| ISO 22163 (IRIS) | AS 9100 |
| ISO 9001 | ISO 14001 |
| ISO 45001 | ISO 13485 |
Compliant standard(s)
| IEC 60310 |