HET 80kVA Four-Tap Exciter Transformer Specifications

Multi-Voltage High Power Transformer

This 80kVA single-phase exciter transformer features four selectable high-voltage outputs with ONAN cooling, designed for precision testing applications up to 32kV.

Electrical Specifications

• Rated Capacity: 80kVA

• LV Voltage: 0.4kV

• LV Current: 100A

• Frequency: 50Hz

• Impedance: <4%

• Partial Discharge: <2pC at rated voltage

Advanced Technical Features

Insulation System

• Cylinder winding design with turn-to-turn insulation

• Electrostatic shield between HV windings

• Compound insulation tube skeleton

• Balanced top/bottom capacitance distribution

Structural Design

• Steel housing with wheel-mounted mobility

• Shell-type oil tank with conservator

• 32kV corona-free fiber glass bushings

• Porcelain bushings for LV connections

Protection System

1. Overvoltage Protection:

• Piezoresistors on all HV outputs

• Zinc oxide arresters for grounding

2. Flashover Prevention:

• Main and minor insulation protection

• Isovolumetric capacitance core design

3. Partial Discharge Control:

• <2pC at rated voltage

• Electrostatic shielding system

Performance Specifications

Typical Applications

• High-voltage cable testing

• Power transformer excitation

• GIS (Gas Insulated Switchgear) testing

• Partial discharge measurement systems

• Electrical research laboratories

Safety Compliance

• 32kV corona-free operation verified

• Protected against external potential surges

• Oil-immersed design for thermal stability

• All bushings include corona rings

The HET 80kVA four-tap exciter transformer delivers exceptional flexibility for high-voltage testing applications, combining multiple voltage outputs with industry-leading partial discharge performance (<2pC).