HET 300kVA/1.8kV Exciter Transformer – Precision Low-Frequency Testing

The HET 300kVA/1.8kV, 0.9kV Exciter Transformer is engineered for low-frequency (20-300Hz) high-voltage testing, featuring robust insulation, harmonic suppression, and ONAN cooling for stable performance in demanding industrial environments.

Key Specifications

• Rated Capacity: 300kVA

• Phase: Single-phase

• Frequency: Rated 25Hz (Operational range: 20-300Hz)

• Cooling Method: ONAN (Oil Natural Air Natural)

• Rated Voltages:

• Low Voltage (LV): 2×400V, 2×460V, 2×500V

• High Voltage (HV): 0.9kV, 1.8kV

• Rated Currents:

• LV: 2×326A

• HV: 166A

• Impedance Voltage: <5%

• Noise Level: ≤60dB(A)

Design & Structural Features

• Oil-Immersed Steel Construction: Ensures durability and efficient heat dissipation.

• Copper Bus Connections: Provides low-resistance LV winding links for combined operations.

• Transport Resilience: Internal components remain secure after rail, road, or lifting transport.

• HV Bushing Protection: Parallel capacitors suppress harmonic interference on output side.

• Low-Frequency Optimization: Flux density design tailored for 20-300Hz operation.

Insulation & Safety Systems

• Electrostatic Shielding: Insulation layers between HV windings and turn-to-turn gaps prevent flashover.

• Cylinder-Type Windings: Uniform area distribution with electrostatic compensation for balanced voltage.

• Compound Insulation Skeleton: Reduces partial discharge and shields the iron core.

• Flashover Prevention: Protects main and minor insulation from external voltage surges.

Applications

Ideal for:

• Low-frequency withstand voltage testing

• Cable and transformer diagnostic tests

• Industrial power equipment validation

• High-voltage research labs

Conclusion

The HET 300kVA/1.8kV Exciter Transformer combines low-frequency adaptability with rigorous safety measures, making it a trusted solution for high-voltage testing where precision and reliability are critical. Its harmonic suppression and robust insulation ensure long-term operational integrity.