>400kVA Rang
HET 450kVA/6kV Exciter Transformer - Low-Frequency Testing Solution
The HET 450kVA/6kV,5kV,3.75kV Exciter Transformer is engineered for specialized low-frequency (20-300Hz) testing with dual-winding design, three voltage ranges, and industrial-grade thermal stability for intermittent operation cycles.
Technical Specifications
| Parameter | Specification |
|---|---|
| Rated Capacity | 450kVA |
| Frequency Range | 20-300Hz (Rated 25Hz) |
| Input Voltage | 2×350V (with 400V/450V taps) |
| Max Input Current | 2×642.8A |
| HV Output Voltage | 3.75kV, 5kV, 6kV (Dual Winding) |
| HV Output Current | 120A (3.75kV), 90A (5kV), 75A (6kV) |
| Cooling Method | ONAN (Oil Natural Air Natural) |
| Thermal Limits | 1hr ON/1hr OFF (3 cycles/day) Winding ≤65K, Oil ≤55K |
| Noise Level | ≤65dB |
| Partial Discharge | ≤10pC |
Advanced Design Features
Dual-Winding Configuration
Flexible Input: 2×350V windings with 400V/450V taps (series/parallel configurable)
Triple HV Outputs: Independent 3.75kV/5kV/6kV windings
Core Material: DQ130-30 cold-rolled silicon steel (ultra-low Bm)
Safety & Monitoring
Electrostatic Shielding: Isolation filter between LV/HV windings
Integrated Measurement: HV-side voltage measurement coil
Oil Management:
Expansion tank with moisture absorber
Temperature and level indicators
Structural Advantages
Shell-Type Construction: Oil-immersed design with transport-safe components
Copper Conductors: High-current capacity (642.8A input)
Corona Prevention: Safe winding distances eliminate partial discharge
Performance Benefits
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