HFRS 700kV/6300kVA Resonant Test System: Dual-Module High Voltage Testing Solution

Dual-Module Configuration Options

The system offers flexible testing configurations with two 350kV modules:

Key Performance Specifications

• Frequency Range: 25-300Hz operational bandwidth

• Thermal Performance:

• Winding temperature rise: ≤80K

• Transformer oil rise: ≤55K

• Epoxy tube surface: ≤40K

• Duty Cycle: 15 minutes ON / 1 hour OFF (4 cycles per day)

• Partial Discharge: <10pC at rated voltage

• Quality Factor: Q≥80 at rated frequency

Advanced Engineering Design

Magnetic Circuit Design

Precision-engineered components ensure optimal performance:

• Segmented air gap iron core for linear inductance

• High-purity copper windings with ≤2% tolerance

• Precision-tuned 123H inductance per module

Thermal Management System

Advanced cooling features include:

• Oil-immersed self-cooling design

• Iron shell construction for maximum heat dissipation

• Breather capsule for oil expansion compensation

• Military-grade epoxy insulation system

Field Deployment Features

• Heavy-duty transport design (rail/road certified)

• Integrated suspension hooks (10-ton capacity)

• Dual-configuration nameplates (single/series)

• All-weather metal enclosure (IP55 rated)

Performance Advantages

Typical Test Applications

1. EHV Cable Systems Testing

Comprehensive testing for 500kV-765kV cables:

• 700kV AC withstand testing

• Partial discharge mapping

• Tan delta measurement at operational voltage

2. GIS and GIL Commissioning

Essential for gas-insulated equipment:

• Three-phase simultaneous testing capability

• SF₆ density monitoring during tests

• 770kV lightning impulse simulation

3. Power Transformer Testing

Factory and field diagnostic applications:

• Frequency response analysis

• Winding deformation detection

• Full power factor testing

Operational Guidelines

Safety Protocols

• Maintain 10m clearance during 700kV tests

• Implement dual-point grounding during configuration changes

• Continuous oil temperature monitoring required

Maintenance Schedule

• Pre-test: Visual inspection of bushings and connections

• Monthly: Oil dielectric strength verification

• Annual: Full winding resistance measurement

• After 5 transports: Structural integrity inspection

This 700kV/6300kVA resonant test system represents the pinnacle of high voltage testing technology, delivering laboratory-grade precision in rugged field-deployable packages for utility-scale applications.