High-Voltage Measurement Solution for Industrial Power Systems

Engineered for 18kV applications, the LQHVF combines exceptional accuracy (≤1%) with ultra-low dielectric loss (<0.2%). Its 3000pF capacitance and 1000:1 ratio enable:

• Precise RMS voltage measurement in switchgear and transformers

• Sensitive partial discharge detection (<5pC)

• Harmonic analysis up to 15kHz bandwidth

• Dielectric loss monitoring in critical HV equipment

Technical Specifications

Innovative Connection System

Single-Stage Measurement

Configuration: Direct connection via corona-free terminal

Use Case: Standard voltage monitoring

Setup Time: <5 minutes

Two-Stage Series Connection

Configuration: Cascaded HV arms

Use Case: Extended voltage range applications

Voltage Capacity: +40%

HV Connection: Corona-free terminals with scalable interfaces prevent RF interference during measurements.

Transport-Optimized Structural Design

Removable Aluminum Corona Rings: 30% smaller packaging volume for logistics efficiency

• Aluminum Alloy Construction: High strength-to-weight ratio (total weight <15kg)

• Modular Components: Quick-disconnect L-arm, HV arm, and base

• Stabilized Pedestal: Non-slip base with leveling feet for uneven surfaces

• ONAN Cooling: Oil Natural Air Natural system maintains thermal stability

Advanced Safety Features

• Over-Voltage Withstand: 19.8kV (110% rated voltage) for 1 minute without discharge

• Dual-Isolation Measurement: Special lead-wire connects to variable frequency power source

• Automatic Discharge: Integrated bleeder resistors (500kΩ)

• Visual Indicators: Oil level sight glass and pressure relief flag

Compliance & Applications

Standards Compliance:

• IEC 60270:2000 (Partial Discharge Measurements)

• IEEE 4-2013 (High-Voltage Testing Techniques)

• EN 60060-1:2010 (HV Test Requirements)

Key Applications:

1. Factory acceptance testing of 18kV switchgear

2. On-line PD monitoring in industrial substations

3. Dielectric response analysis of power transformers

4. High-voltage research and development labs

Operational Protocol

Measurement Tip: For series connection, synchronize measurement devices using IRIG-B timecode

1. Grounding: Establish earth connection before energization (min 10mm² cable)

2. Cooling Check: Verify 20cm air clearance around unit

3. HV Connection: Use corona-free terminals with silicone-insulated connectors

4. Lead-Wire Connection: Connect measuring lead to variable frequency source

5. Post-Operation: Wait 5 minutes before disconnecting for capacitor discharge