HET 400kVA/40kV Exciter Transformer - High-Voltage Cable Testing Solution

The HET 400kVA/40kV,11.4kV,5.7kV Exciter Transformer is engineered for demanding high-voltage applications, featuring specialized 10A mode for cable testing, laboratory-grade partial discharge performance (<2pC), and 40kV corona-free operation.

Key Specifications

Specialized Design Features

Cable Testing Optimization

• 10A HV Mode: Dedicated low-current setting for short cable tests with water termination

• Electrostatic Shielding: Multi-layer isolation between HV/LV windings prevents interference

• Ultra-Low Discharge: <2pC ensures accurate cable insulation assessment

Safety & Protection

• Dual-Protection System:

• Piezoresistor arrays on all HV outputs

• Zinc oxide arresters (IEEE C62.11 compliant)

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

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

Structural Advantages

• Mobile Test Platform: Wheel-mounted steel enclosure (1000×800×1500mm)

• Advanced Bushings:

• HV: Isovolumetric capacitance core fiberglass

• LV: Porcelain bushings (IEC 60137)

• Oil Management: Conservator with temperature-compensated level indicator

Performance Highlights

Specialized Cable Testing

10A mode for short cable evaluations with water termination

Measurement Precision

<2pC partial discharge for reliable diagnostics

Wide Voltage Range

5.7kV to 40kV coverage in one system

North American Standard

60Hz optimized design

Typical Applications

• High-voltage cable factory acceptance tests

• Short cable segment diagnostics

• Transformer withstand voltage testing

• Research lab insulation studies

Standards Compliance

• IEC 60270 (Partial Discharge Measurements)

• IEEE C57.12.90 (Test Procedures)

• ANSI/NETA ATS (Acceptance Testing)

Why This Transformer?

1. Cable Testing Specialization: Unique 10A mode for water-terminated cables