HET 80kVA Exciter Transformer Technical Specifications

Three-Tap High Voltage Transformer

The HET 80kVA exciter transformer delivers flexible output voltages with 1-hour duty cycle capability, designed for rigorous electrical testing applications.

Electrical Parameters

• Rated Capacity: 80kVA

• Input Voltage: 0.6kV

• Frequency: 50Hz

• Impedance Voltage: <5%

• Cooling Method: ONAN

Duty Cycle & Operation

• Operating Cycle: 1 hour ON / 1 hour OFF

• Daily Cycles: Maximum 3 operations per day

• Thermal Recovery: Built-in cooling periods prevent overheating

Advanced Protection System

Electrical Protection

• Electrostatic shield between HV/LV windings

• Piezoresistors on all HV outputs

• Zinc oxide arresters for ground connection

• 5kV corona-free bushings with rings

Structural Features

• Steel enclosure with wheel-mounted design

• Shell-type oil tank with conservator

• Porcelain bushings for LV connections

• Fiber glass bushings for HV terminals

Insulation Technology

1. Cylinder Winding Design: With inter-turn insulation layers

2. Balanced Electrostatic Field: Compensated top/bottom voltage distribution

3. Compound Insulation Tube: Minimizes partial discharge (PD)

4. Oil Immersion System: Maintains dielectric strength

Key Performance Features

Typical Applications

• Circuit breaker testing

• Transformer excitation

• High-voltage equipment diagnostics

• Insulation resistance testing

• Electrical research laboratories

Safety Compliance

• Flashover protection from external surges

• Protected main and minor insulation systems

• Isovolumetric capacitance core design

• Thermally optimized duty cycle

The HET 80kVA exciter transformer combines multiple voltage outputs with robust construction, making it ideal for intermittent high-voltage testing applications requiring precise voltage control.