HET 75kVA Multi-Range Exciter Transformer (3.75kV-25kV)

Engineered for high-voltage testing applications, the HET 75kVA exciter transformer delivers three precision outputs (3.75kV/5kV/25kV) at 60Hz frequency. Features <5% impedance voltage and comprehensive safety systems for industrial and utility testing.

Technical Specifications

Core Design Features

Advanced Insulation System

• Electrostatic Shielding: HV-LV winding isolation layer

• Cylinder-Type Windings: Balanced top/bottom area distribution

• Compound Insulation Tube: Reduces partial discharge and core losses

• Voltage Stabilization: Electrostatic compensation technology

Mechanical Construction

• ONAN Cooling: Oil Natural Air Natural system

• Steel Housing: Shell-type oil tank with conservator

• Mobile Design: Wheel-mounted with 360° mobility

• Corona-Free Bushings: Fiberglass HV bushings (5kV verified)

Protection Systems

Electrical Protection

• Zinc oxide arresters on all HV outputs

• Piezoresistors per HV terminal

• Isovolumetric capacitance core

Structural Safety

• Porcelain LV bushings

• Multi-layer turn insulation

• Flashover protection for all insulation

Performance Advantages

1. Triple-Voltage Output: 3.75kV to 25kV range

2. High Current Capacity: Up to 20A at 3.75kV

3. 60Hz Optimized: Designed for American power standards

4. Field-Ready: Wheeled base for test site mobility

Typical Applications

• Utility transformer testing

• High-voltage cable qualification

• Industrial equipment dielectric tests

• 60Hz research applications

Complies with IEEE C57.12.00 and ANSI C57.12.90 standards for 60Hz operation. Recommended maintenance: 18 months or 1500 operational hours.