HET 50kVA Multi-Output Exciter Transformer (5kV-30kV)

Designed for laboratory and field testing applications, the HET 50kVA exciter transformer delivers four precise voltage outputs (5kV/10kV/20kV/30kV) with industry-leading partial discharge performance (<2pC at 80% load). Features advanced electrostatic shielding and zinc oxide overvoltage protection.

Technical Specifications

Performance Metrics

• Partial Discharge: <5pC at 100% load, <2pC at 80% load

• Insulation Withstand: 1.15× rated voltage for 1 minute

• Noise Level: ≤60dB at 1m distance

Key Design Features

Advanced Insulation System

• Electrostatic Shielding: HV-LV winding isolation layer

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

• Compound Insulation Tube: PD reduction and core shielding

• Voltage Distribution: Electrostatic compensation technology

Mechanical Construction

• Steel Housing: Shell-type oil tank with conservator

• Corona-Free Bushings: Fiberglass with rings (30kV rated)

• Mobility: Wheel-mounted movable base

• Isovolumetric Core: Stable capacitance for HV bushings

Protection Systems

Electrical Protection

• Zinc oxide arresters on all HV outputs

• Piezoresistors per HV terminal

• Ground-connected input/output

Safety Features

• Flashover protection for main/minor insulation

• Porcelain LV bushings

• Multi-layer turn insulation

Testing Capabilities

1. Multi-Range Testing: Single unit replaces multiple transformers

2. Precision Measurements: 0.39% voltage ratio accuracy

3. Silent Operation: 60dB noise ceiling

4. Field Deployment: Wheeled design for site mobility

Compliance & Maintenance

• Meets IEC 60076-11 for dry-type transformers

• IEEE C57.12.01 compliance for liquid-immersed types

• Recommended calibration: 18 months/2000 hours

Typical Applications: Cable withstand testing, insulator R&D, transformer factory tests, high-voltage component validation