Engineered for dual-function precision in high-voltage environments, the LQHVF 700kV/300pF system serves as both a measurement-grade voltage divider and power line coupling capacitor. Designed for substation monitoring, HV laboratory testing, and grid communication systems, this oil-immersed solution delivers exceptional stability at 50Hz operations.

Technical Specifications

Electrical Parameters

• Rated Voltage: 700kV AC

• Nominal Capacitance: 300pF ±5%

• Frequency: 50Hz (60Hz optional)

• Dividing Ratio: 2000:1 nominal

Performance Metrics

• Measurement Accuracy: ≤±1%

• Dielectric Loss (tanδ): <0.2%

• Partial Discharge: <5pC at 700kV

• Continuous Operation: 60 min at 100% rating

Innovative Structural Design

Modular Oil-Immersed System

• Removable corona rings (aluminum alloy)

• Field-separable HV/LV arms

• Baseplate with seismic anchors (IEC 60068-3)

• N2-inerted tank (oxygen <0.5%)

Thermal Management

• ONAN cooling (Oil Natural Air Natural)

• Temperature stability: ±2°C at full load

• Built-in oil quality sensors

Dual-Function Operation

Connection System

• Corona-free HV terminals (RIV <35dB)

• Calibrated measuring lead (50m standard)

• Variable frequency source compatibility

Certifications & Industry Applications

International Standards

• IEC 60358: Coupling capacitors

• IEC 60060-1: HV test techniques

• IEEE 4: Measurement standards

Critical Applications

• EHV substation voltage monitoring

• Power line carrier communication

• Dielectric loss angle testing

• Protective relay calibration

Safety & Maintenance Protocols

1. Pre-energization insulation resistance test (>10GΩ)

2. Double-grounding verification (IEC 61936)

3. Oil dielectric strength monitoring (>60kV/2.5mm)

4. 5-year recertification cycle (IEC 60480)

Safety Notice: Requires Class E3 PPE per IEC 61482 for all operations. Minimum clearance: 6 meters.