HET 70kVA Dual-Output Exciter Transformer (5kV/10kV)

Designed for demanding test environments, the HET 70kVA exciter transformer delivers stable 5kV and 10kV outputs with <5% impedance voltage. Features ONAN cooling and comprehensive safety systems for reliable operation in industrial and laboratory settings.

Technical Specifications

Key Design Features

Advanced Insulation System

• Electrostatic Shielding: Dedicated layer between HV and LV windings

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

• Compound Insulation Tube: Reduces partial discharge and shields iron core

• Voltage Stabilization: Electrostatic compensation for uniform distribution

Mechanical Construction

• ONAN Cooling: Oil Natural Air Natural system

• Steel Housing: Shell-type oil tank with conservator

• Mobile Design: Wheel-mounted with movable base

• Corona-Free Bushings: Fiberglass HV bushings (10kV rated)

Protection Systems

Electrical Protection

• Zinc oxide arresters on all HV outputs

• Piezoresistors per HV terminal

• Isovolumetric capacitance core for stable performance

Structural Safety

• Porcelain LV bushings

• Multi-layer turn-to-turn insulation

• Flashover protection for main/minor insulation

Performance Advantages

1. Dual-Voltage Output: Switchable 5kV/10kV operation

2. High Current Capacity: 184.2A LV input rating

3. Energy Efficient: <10% no-load current

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

Typical Applications

• Power transformer factory testing

• Medium-voltage cable evaluation

• Industrial equipment dielectric tests

• Research lab voltage generation

Complies with IEC 60076-3 insulation standards and IEEE C57.12.00 safety requirements. Recommended maintenance interval: 2 years or 2000 operational hours.