HET 300kVA/10kV Exciter Transformer – Multi-Range High-Voltage Testing

The HET 300kVA/10kV,5kV,2.5kV Exciter Transformer is designed for versatile high-voltage testing applications, featuring independent HV windings, low-frequency (25Hz-300Hz) operation, and advanced electrostatic shielding to ensure safety and precision in industrial environments.

Key Specifications

• Rated Capacity: 300kVA

• Frequency:

• Rated: 25Hz

• Operational Range: 20-300Hz

• Voltage Ranges:

• LV Winding: 2×450V, 2×500V, 2×550V

• HV Winding: 2.5kV, 5kV, 10kV (independent windings)

• Current Ratings:

• LV: 2×300A

• HV: 30A

• Cooling System: ONAN (Oil Natural Air Natural)

• Heat Resistance: Class A, 25# transformer oil

• Noise Level: ≤60dB

• Impedance Voltage: <5%

Advanced Design Features

• Core Material: D0130-30 cold-rolled silicon steel plates with ultra-low Bm value for reduced losses.

• Electrostatic Shielding: Isolation filter function between LV and HV windings to minimize interference.

• Measurement Coil: Integrated HV side voltage measurement for precision monitoring.

• Oil Management:

• Expansion cylinder with moisture absorber

• Oil temperature thermograph and level indicator

• Transport-Optimized: Spare parts (bushings, valves) designed to avoid transport damage.

Insulation & Safety Systems

• Partial Discharge Prevention:

• Safe clearance between HV/LV windings eliminates corona discharge.

• Cylinder-type windings with balanced top/bottom area distribution.

• Multi-Layer Protection:

• Turn-to-turn insulation layers

• Electrostatic shielding compensates for voltage distribution

• Compound insulation tube reduces discharge and shields iron core

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

Typical Applications

• Frequency-dependent withstand voltage tests (20-300Hz)

• Power cable and transformer diagnostics

• High-voltage equipment factory acceptance testing

• Research labs for insulation aging studies

Why Choose This Transformer?

1. Multi-Voltage Flexibility: Three HV output ranges (2.5/5/10kV) suit diverse test scenarios.

2. Low-Frequency Precision: Optimized for 25Hz operations with 20-300Hz bandwidth.

3. Built for Safety: Electrostatic shielding and discharge prevention meet IEC standards.

4. Low Maintenance: ONAN cooling and robust oil system extend service life.

Conclusion

The HET 300kVA/10kV Exciter Transformer sets a benchmark for high-voltage testing equipment, combining flexible voltage outputs, rigorous safety mechanisms, and precision engineering for critical power infrastructure diagnostics.