HET 75KVA Exciter Transformer Technical Specifications & Safety Features

Product Overview

The HET 75KVA exciter transformer is a single-phase unit designed for high-voltage testing applications, featuring manual tap-changing capability and advanced insulation systems.

Key Specifications

Advanced Insulation System

Multi-Layer Protection

• 25# Transformer Oil: Primary insulation medium meeting power frequency withstand of 10kV/1min

• Electrostatic Shield: Between HV windings to control potential distribution

• Fiber Glass Bushing: HV terminal insulation with corona rings (5kV corona-free guarantee)

• Cylinder Winding Design: With inter-turn insulation layers for partial discharge reduction

Safety Protection Features

Overvoltage Protection

Integrated protection system includes:

• Zinc oxide arresters on all HV outputs

• Ground-connected input/output terminals

• Piezoresistors for each HV output

Structural Safety

• Steel housing with movable wheel base

• Shell-type oil tank with conservator

• Isovolumetric capacitance core design

• Compound insulation tube winding skeleton

Design Advantages

1. Voltage Distribution: Electrostatic shielding ensures balanced top/bottom voltage distribution

2. Partial Discharge Control: Shielded iron core and optimized winding area minimize discharge

3. Thermal Management: ONAN cooling maintains stable operation under rated loads

4. Tap Flexibility: Manual tap-changer allows 4.2kV or 2.5kV output selection

Industrial Applications

This exciter transformer is ideal for:

• High-voltage laboratory testing

• Power equipment diagnostic systems

• Electrical insulation testing

• Industrial excitation systems

Compliance & Standards

Designed to meet international electrical safety standards for:

• Insulation coordination

• Partial discharge limits

• Corona discharge prevention

• Oil-immersed transformer requirements

The HET 75KVA exciter transformer combines precision engineering with robust safety features, making it a reliable solution for demanding high-voltage applications. All specifications are subject to verification under standard testing conditions.