Dual-Role Instrument for Complete HV Testing

The LQHVF 300kV/3000pF system combines precision voltage measurement and power line coupling in a single configurable platform. With industry-leading 6000:1 ratio and wide 25-400Hz frequency range, this solution delivers:

• Dual functionality: Coupling capacitor and voltage divider

• Two operational configurations: 150kV (single-stage) or 300kV (two-stage)

• Ultra-precise 6000:1 measurement ratio

• 330kV insulation withstand (110% rated voltage)

6000:1 Precision Ratio

Technical Specifications

25Hz

→

400Hz

Dual Configuration Capabilities

Single-Stage Configuration

Voltage Range: Up to 150kV
                   Capacitance: 6000pF
                   Applications:

                   - Power transformer testing

                   - Medium-voltage cable testing

                   - Industrial equipment validation

Two-Stage Series Configuration

Voltage Range: 150-300kV
                   Capacitance: 3000pF
                   Applications:

                   - EHV transmission testing

                   - Extra-long cable commissioning

                   - 500kV GIS substation testing

Seamless Reconfiguration

Switch between configurations in under 30 minutes using proprietary corona-free connectors - no specialized tools required.

Innovative Design Features

Modular Capacitor System

Interchangeable units enable single-stage (6000pF) or series (3000pF) operation.

Removable Corona Rings

Aerospace-grade aluminum alloy rings detach for compact transport.

Stabilized Removable Base

Engineered pedestal with seismic restraints and forklift channels.

ONAN Cooling System

Oil Natural Air Natural cooling maintains thermal stability during 1-hour operations.

Dual-Function Operation

As Precision Voltage Divider

6000:1 ratio with ≤1% error for:

               - Dielectric response analysis

               - Harmonic measurement

               - Transient capture

As Coupling Capacitor

3000pF capacitance optimized for:

               - Power line carrier communication

               - Protection signaling

               - SCADA data transmission

Industry Applications

Flexible Test Laboratories

Single system handles both medium-voltage (≤150kV) and EHV (≤300kV) testing requirements.

Mobile Test Teams

Configurable solution reduces equipment footprint by 40% for field commissioning teams.

Substation Monitoring

Simultaneous voltage measurement and data communication in compact installations.

Operational Advantages

• Unmatched Flexibility: 150kV or 300kV operation from single system

• Extended Frequency: 25-400Hz range covers VLF to harmonic analysis

• Space Optimization: 30% smaller footprint than separate systems

• Cost Efficiency: Eliminates need for multiple test sets

"The dual-configuration design replaced three separate instruments in our mobile lab - we now cover 90% of field tests with one system."
               - Field Testing Manager, Utility Service Provider

Configuration Protocol

1. Select Mode:

• Single-stage: For ≤150kV applications

• Two-stage series: For 150-300kV applications

2. Assemble: Connect modules with corona-free HV connectors

3. Install Corona Rings: Secure aluminum alloy rings

4. Connect: Use special lead-wire to VF power source

5. Ground: Dual 35mm² cables to station grid

6. Safety: Maintain 7m clearance during 330kV tests

Compliance & Standards

Certified to international standards:

• IEC 60358-1: Coupling capacitors & capacitor dividers

• IEEE 4: Standard for HV testing

• IEC 60060-1: High-voltage test techniques

• IEC 60270: Partial discharge measurements

KEMA-certified for both configurations at maximum ratings.