HCTT-240kV/1.67A High-Current Charging Transformer

Product Overview

The HCTT-240kV/1.67A represents the pinnacle of high-current HV testing technology, combining 400kVA capacity with exceptional 1.67A output current and ≤5pC partial discharge performance for large-scale test applications.

Technical Specifications

Performance Characteristics

Key Metrics

• Partial Discharge: ≤5pC @ 240kV, ≤3pC @ 192kV

• No-load Current: ≤10% of rated current

• Waveform Distortion: ≤5% THD at full load

• Current Stability: ±0.5% over 8-hour operation

Robust Design Features

Partial Discharge Control

• Quadruple-shielded pancake winding design

• Gas-insulated HV bushing (SF6 alternative available)

• On-line oil degassing system (≤10ppm moisture)

• All internal edges radiused (R10 minimum)

Thermal Management

• Winding ΔT: ≤65K at 1.67A continuous

• Oil ΔT: ≤55K under maximum load

• Three-stage cooling system:

1. Natural convection (base load)

2. Forced oil circulation (12m³/hr)

3. Water-assisted cooling (optional)

Insulation System

Mechanical Design

• Modular tank construction (15mm steel walls)

• Vibration-isolated core (1Hz natural frequency)

• Quick-disconnect HV terminal (5-minute changeout)

• Cleanroom assembly (Class 100)

Compliance Standards

• IEC 62067 (Cable Test Systems)

• IEEE C57.152 (PD Measurement Guide)

• EN 50581 (Industrial HV Equipment)

• ASTM D924 (Dielectric Loss Test)

Industrial Applications

• Extra High Voltage (EHV) cable testing

• GIS (Gas Insulated Substation) commissioning

• High-current partial discharge research

• Pulsed power system development

• Supergrid equipment verification

With its unprecedented 1.67A output current at 240kV, the HCTT transformer enables testing of ultra-high capacitance loads (up to 11,000pF). The ≤5pC partial discharge level maintains measurement integrity even in sensitive high-current test environments.