HET 375kVA/37.5kV Exciter Transformer - Precision High-Voltage Testing

The HET 375kVA/37.5kV,25kV,12.5kV Exciter Transformer redefines high-voltage testing standards with triple-range output, industry-leading partial discharge performance (<2pC at 80% load), and failsafe operator protection systems.

Technical Specifications

Cutting-Edge Design Features

Voltage & Insulation System

• Triple-Range Output: 12.5kV to 37.5kV with precision taps

• Electrostatic Shielding: Multi-layer isolation between HV windings

• Ultra-Low Discharge: <2pC at 80% rated voltage (superior to IEC 60270 Class I)

Safety & Protection

• Dual-Protection System:

• Piezoresistor arrays on each HV output

• Zinc oxide arresters (IEEE C62.11 compliant)

• 40kV Corona-Free: Fiberglass bushings with triple corona rings

• Flashover Prevention: Turn-to-turn insulation withstands 200% surges

Structural Engineering

• Mobile Test Platform: Wheel-mounted steel enclosure (800×600×1200mm)

• Advanced Bushings:

• HV: Isovolumetric capacitance core (37.5kV rating)

• LV: Porcelain bushings per IEC 60137

• Oil Management: Conservator with temperature-compensated level indicator

Performance Advantages

Micro-Discharge

<2pC at 80% load ensures lab-grade accuracy

Triple-Range Flexibility

12.5kV-37.5kV coverage for diverse test scenarios

High Current Capacity

937.5A LV current for heavy-duty testing

Thermal Stability

ONAN cooling with 25# transformer oil

Industrial Applications

• Power transformer factory acceptance tests

• HV cable partial discharge measurement

• GIS (Gas In