Engineered for Demanding HV Measurement Applications

The LQHVF 250kV/15000pF capacitive voltage divider sets new standards for high-capacity measurement with an exceptional 10-300Hz frequency range. Designed for critical power system testing, this solution delivers:

• High-current measurement capability with 15nF capacitance

• Laboratory-grade accuracy (≤1.5%) in field conditions

• 275kV insulation withstand for 1 minute (110% rated voltage)

• Scalable configuration for single or multi-stage testing

Industry-Leading Frequency Range

Performs accurate measurements from 10Hz to 300Hz - covering sub-harmonic analysis, power frequency testing, and VLF cable testing applications.

10Hz

→

300Hz

Technical Specifications

Innovative Design Features

Removable Corona Rings

Aluminum alloy corona suppression rings detach for compact transport and reassemble in minutes.

Stabilized Removable Base

Engineered pedestal with seismic-grade stability and forklift pockets for site mobility.

Corona-Free HV Connection

Scalable connectors eliminate partial discharge at maximum voltage.

ONAN Cooling System

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

Advanced Measurement Capabilities

Dual-Stage Serial Connection

Measure voltages up to 500kV using series-connected configuration with single control unit.

Variable Frequency Operation

Special lead-wire interface connects directly to VF power sources for resonant testing applications.

Industry Applications

Cable VLF Testing

0.1Hz frequency testing of 220kV cables with 15nF matching capability.

Transformer Frequency Response

Sweep frequency response analysis (SFRA) from 10Hz to 300Hz.

GIS Partial Discharge

High-sensitivity PD measurement in gas-insulated substations.

Operational Advantages

• Wide Frequency Coverage: Single instrument for power frequency, VLF, and harmonic tests

• High Current Tolerance: 15000pF capacitance handles 3A+ measurement currents

• Rapid Deployment: Modular design assembles in

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• Scalable Architecture: Connect multiple units for higher voltage applications

"The 10-300Hz range eliminates the need for multiple test setups - we reduced commissioning time by 40% on 220kV cable projects."
               - Testing Manager, Power Cable Installation Contractor

Installation & Operation Protocol

1. Foundation: Level surface with minimum 3m x 3m clearance

2. Assembly: Secure corona rings using alignment markers

3. Connection: Use shielded measuring leads to VF source

4. Configuration: Select single-stage or series mode

5. Safety: Maintain 5m clearance during 275kV withstand tests

6. Duration: Maximum 60 minutes continuous operation

Compliance & Standards

Manufactured to international electrical standards:

• IEC 60060-1/2: High-voltage test techniques

• IEEE 4: Standard for HV testing

• IEC 60502: Power cables testing requirements

• IEC 60270: Partial discharge measurements

Third-party certified at KEMA Laboratories for 275kV/1min withstand.