Engineered for Critical Ultra-HV Applications

Designed for 50kV power systems, the LQHVF combines laboratory-grade accuracy with field-deployable reliability. The optimized 300pF capacitance enables:

• Ultra-sensitive partial discharge detection (<3pC)

• Precise voltage measurement with ≤±1% accuracy

• Extended frequency response (DC to 100kHz)

• Minimal circuit loading during measurements

50kV

Technical Specifications

Modular Structural Design

Corona Rings

Precision-engineered aluminum

Removable design

Ly Arm

Measurement interface

BNC output

Hy Arm

High-voltage terminal

50kV rated

Removable Base

Stabilized platform

Leveling feet

Oil-Immersed Construction

High-grade mineral oil with dielectric strength >65kV/mm

Field Benefit: Enhanced arc suppression and thermal stability

Quick-Disconnect System

Tool-free assembly in under 10 minutes

Maintenance Advantage: Component-level servicing

Dual-Function Capabilities

Voltage Division

Range: 0-50kV

Accuracy: ≤±1% from DC to 50kHz

Phase Error: <0.1° at 50Hz

PD Coupling

Sensitivity: <3pC at 50kV

Bandwidth: 20Hz-100kHz

Impedance: Optimal for 50kV systems

Technical Advantage: The 300pF capacitance provides the optimal balance for 50kV applications - offering 30% better signal-to-noise ratio than 100pF models for PD detection while maintaining excellent high-frequency response.

Thermal Management

• ONAN Cooling: Oil Natural Air Natural convection maintains safe operating temperatures

• Thermal Performance: <45°C rise during 60-min full-load operation

• Operating Protocol:

• 60 minutes continuous at 50kV

• Recommended 90-minute cooling period

• Clearance Requirements: Maintain 30cm air space around unit

Compliance & Applications

Standards Compliance: IEC 60270:2000, IEEE 4-2013, EN 60060-1:2010

Critical Applications:

• Testing of 50kV switchgear and GIS

• Partial discharge monitoring in EHV transformers

• High-voltage research laboratories

• Power quality analysis in transmission systems

• Dielectric testing of insulation materials

Operational Protocol

Assembly

1. Secure base to stable surface

2. Connect Ly-arm to base

3. Install Hy-arm assembly

4. Attach corona rings

Safety Measures

1. Ground base with ≥12mm² cable

2. Maintain 1.5m personnel clearance

3. Verify oil level before energization

Operation

1. Ramp voltage gradually (≤5kV/s)

2. Max 60 minutes at 50kV

3. Monitor temperature

PD Measurement

1. Connect to PD analyzer via Ly-arm

2. Use double-shielded coaxial cables

3. Maintain cable length ≤1.5m

Pro Tip: For maximum PD sensitivity, perform system calibration with a pulse generator according to IEC 60270 before measurements

Why This Instrument?

Unmatched PD Sensitivity

<3pC detection at 50kV

Ultra-HV Precision

≤±1% measurement accuracy

Field Maintainable

Removable modular design

Thermal Resilience

ONAN cooling for stable operation