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Tanaka Electric
Tanaka Electric
Traction transformers are special transformers used in electrified railways to provide electric energy for electric locomotives or EMUs, and are core equipment in the traction power supply system. Their core function is to convert high voltage public power grids (110kV, 220kV) into low voltage suitable for electric locomotives (25kV single-phase AC).
Frequent overload capacity (2-3 times rated value) and high short-circuit tolerance (over 10kA for 2+ seconds).
Advanced phase shifting technology or filter windings to handle 3rd and 5th harmonics from locomotive rectifiers.
Operates from -40ºC to +45ºC. Anti-fouling design with creepage distance ≥31mm/kV for harsh environments.
Backup cooling systems and real-time online monitoring for partial discharge and temperature.
| Parameters | Traction Transformer | Ordinary Distribution Transformer |
|---|---|---|
| Overload Capacity | 200% / 10 minutes | 150% / 1 minute |
| Short-circuit Impedance | 10%-12% | 4%-6% |
| Insulation Grade | Class H (180ºC) | Class F (155ºC) |
| Annual Operating Hours | 8700 hours | 5000 hours |
| Reference Standards | IEC 60076-11 |
| Capacity | 3300kVA |
| Voltage (HV) | 33KV or customized |
| Voltage (LV) | 0.4KV or customized |
| Tapping Range | + 2 x 2.5% , - 2 x 2.5% |
| Core Materials | Silicon Steel |
| Winding Materials | Aluminum or Copper |
| Temperature Rise | 125K (H-class) |
| Cooling Method | AN/AF |
Founded in 1958, the manufacturer is an outstanding power equipment supplier in the transmission and distribution industry. With a land area of 100,000 square meters and over 600 employees, more than 200,000 transformers are currently in operation worldwide across Southeast Asia, Central Asia, Africa, Europe, and North America.
