LQHVF 750kV/400pF Capacitor Voltage Divider & Coupling Capacitor

Engineered for precision high-voltage measurement and partial discharge (PD) analysis, this oil-immersed capacitive divider delivers laboratory-grade accuracy in field applications. With dual voltage ratios and IEC-compliant design, it's ideal for substation testing and transformer validation.

Key Specifications

Innovative Structural Design

Modular Oil-Immersed Construction

• Top Corona Cover: Prevents discharge at extreme voltages

• HV Arm: Optimized for 750kV operation

• LV Arm: Precision signal output for measurement

• Movable Basement: Integrated wheels for site mobility

Transformer Compatibility

Height-matched to standard test transformers for seamless integration in PD test setups.

Dual-Function Operation

1. Capacitive Voltage Divider

Accurate RMS voltage measurement with:

• Selectable 1000:1 or 2000:1 ratios

• ±1% uncertainty across full range

• Harmonic distortion immunity

2. Coupling Capacitor for PD Testing

IEC 60270-compliant partial discharge detection:

• Ultra-low dielectric loss (<0.3%)

• 400pF capacitance for sensitive discharge capture

• 60-minute continuous operation capability

Performance Validation

Dielectric Integrity Testing

Factory-verified under:

• 750kV continuous operation for 60 minutes

• Temperature rise < 40°C during full-load tests

• No observable partial discharge at 1.1x rated voltage

Environmental Resilience

Oil-immersed design ensures:

• Stable performance from -25°C to +50°C

• Humidity resistance up to 95% RH

• Contaminant immunity in industrial environments

Field Deployment Advantages

1. Time-Efficient Setup: Pre-matched height with test transformers eliminates alignment delays

2. Reduced Downtime: Movable design enables rapid test point relocation

3. Measurement Confidence: <0.3% dielectric loss ensures PD signal fidelity

Pro Tip for PD Testing

Use the 2000:1 ratio when measuring voltages above 500kV to extend instrument lifespan. Switch to 1000:1 for enhanced resolution below 300kV.

Compliance & Certifications

• IEC 60137: Insulated bushings for alternating voltages

• IEC 60270: Partial discharge measurements

• IEEE 4: Standard for high-voltage testing

• IEC 60060-2: Test requirements for measuring systems

All units include NIST-traceable calibration certificates and dielectric loss test reports.

Technical Support & Ordering

Includes: Corona cover, HV/LV arms, movable basement, and operation manual. Request PD test configuration guides and impedance matching recommendations from our engineering team.