Dual-Function Instrument for Industrial Power Systems

Engineered for 36kV/50Hz applications, the LQHVF combines precision voltage measurement with PD coupling capabilities. Featuring a 1000:1 ratio and ≤±1% accuracy, it enables:

• Accurate RMS voltage measurement via special lead-wire

• Sensitive partial discharge detection (<5pC)

• Extended voltage testing up to 72kV

• Dielectric loss monitoring with <0.5% dissipation

Technical Specifications

Dual-Base Stability System

p100 Base

Diameter: 100mm

Best for: Confined spaces

Space-saving design

p180 Base

Diameter: 180mm

Best for: Uneven surfaces

Enhanced stability

Structural Advantage: Removable pedestal with non-slip design ensures secure operation in various field conditions.

Scalable Measurement Configurations

Single-Stage Operation

Voltage Range: Up to 36kV

Connection: Direct HV corona-free terminal

Measurement: Via special lead-wire to VF source

Setup Time: <5 minutes

Dual-Stage Series Connection

Voltage Range: Up to 72kV

Configuration: Cascaded HV arms

Measurement: Differential measurement technique

Extended Capacity: +100%

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

Transport-Optimized Design

Removable Aluminum Corona Rings

High-strength alloy construction

Benefit: 40% lighter than steel

Modular Components

Quick-disconnect Ly arm, HV arm, base

Benefit: 60% smaller shipping volume

Oil-Immersed Construction

Mineral oil dielectric

Benefit: Enhanced thermal management

ONAN Cooling

Natural oil/air convection

Benefit: Stable operation during 60-min runs

Advanced Measurement System

• Special Measuring Lead-Wire: Shielded connection to variable frequency power sources (20-400Hz)

• Corona-Free HV Connection: Optimized electrode geometry eliminates surface discharge

• Scalable Interface: Standardized connectors for series configurations

• Automatic Discharge: Integrated 500kΩ bleeder resistors

• Thermal Monitoring: Temperature sensors in critical components

Compliance & Applications

Standards Compliance: IEC 60270:2000 (PD), IEEE 4-2013 (Testing), EN 60060-1:2010 (HV)

Industrial Applications:

• Factory acceptance testing of 36kV switchgear

• On-line PD monitoring in substations

• Extended voltage testing up to 72kV

• Power quality analysis in renewable energy systems

• High-voltage research laboratories

Operational Protocol

Single-Stage Setup

1. Select base (p100/p180) for surface conditions

2. Assemble components

3. Connect measuring lead to VF source

4. Apply HV via corona-free terminal

Dual-Stage Setup

1. Connect two units in series

2. Synchronize measurement systems

3. Use differential measurement technique

4. Apply HV across the series chain

Safety Procedures

1. Ground base with ≥10mm² cable

2. Maintain 1m personnel clearance

3. Verify dielectric strength before use

Pro Tip: For dual-stage operation, use IRIG-B time synchronization between measurement devices for phase-accurate readings

Transport & Handling

Disassembly

1. Remove corona rings

2. Detach HV arm from Ly arm

3. Separate base from assembly

Packaging

1. Use custom foam inserts

2. Protect connectors with caps

3. Secure components in transit case

Reassembly

1. Install base on stable surface

2. Connect Ly arm to HV arm

3. Attach corona rings

Field Advantage: Modular design reduces setup time by 50% compared to fixed units

Why Choose This System?

Measurement Flexibility

Single/Dual-stage configurations

Transport Efficiency

Removable components reduce size

Safety Assurance

40kV withstand voltage rating

Precision Accuracy

≤±1% at 50Hz