Product Overview

This single-phase 12kVA exciter transformer is engineered for high-voltage testing applications up to 4kV, complying with IEC 60076-11 standards for testing transformers. The unit combines movable design with robust dielectric protection systems for field and laboratory use.

Technical Parameters

Advanced Protection Systems

Overvoltage Protection

• Piezoresistors on all HV outputs

• Zinc oxide arresters (IEC 60099-4 compliant)

• Ground-referenced terminals via 10kA arresters

Corona Prevention

• 5kV corona-free HV bushings

• Dual corona rings per HV bushing

• Isovolumetric capacitance cores

Mechanical Construction

Enclosure Design

• 15-gauge steel housing with epoxy coating

• Integrated wheel base (4× industrial casters)

• Shell-type oil tank with 25L conservator

Terminal Configuration

• Porcelain bushings for LV connections

• Fiberglass-reinforced HV bushings

• Voltage-graded bushing arrangement

Winding Technology

Insulation System

• Inter-turn insulation layers (0.5mm Nomex)

• HV-LV electrostatic shielding

• Balanced capacitance distribution (±3%)

Winding Structure

• Cylinder-type winding configuration

• Compound insulation tube skeleton

• Top-bottom area matching within 5%

Dielectric Performance

• Partial discharge <10pC at 1.5Ur

• Impulse withstand 75kV (1.2/50μs wave)

• Power frequency withstand 10kV/min

Installation & Maintenance

Commissioning Requirements

• Minimum 800mm clearance from grounded surfaces

• Oil dielectric strength ≥40kV before energization

• Initial insulation resistance ≥5000MΩ

Service Schedule

• Annual oil testing (breakdown voltage, moisture)

• Bushing cleaning every 6 months

• Winding resistance measurement every 3 years

Typical Applications

• Circuit breaker timing tests

• Power cable withstand testing

• Rotating machine excitation systems

• High-voltage component R&D