Advanced HV Measurement with Unmatched Stability

The LQHVF 250kV/12500pF capacitor voltage divider sets a new standard for measurement consistency with its revolutionary temperature-compensated design. Engineered for laboratory-grade accuracy in field conditions, this solution delivers:

• Ultra-low dielectric loss (<0.2%) for precise insulation assessment

• Temperature-stable divider ratio (1000:1) across operating range

• Mobile deployment capability with integrated casters

• 275kV insulation withstand for maximum reliability

Breakthrough Thermal Stability

Identical medium in HV/LV arms maintains ≤0.1% ratio variance across -20°C to +50°C range - eliminating measurement drift during extended tests.

Technical Specifications

Patented Design Features

Epoxy Oil-Paper Insulation

Tube-shell structure with low-temperature-coefficient material ensures stable capacitance across thermal cycles.

Mobile Base with Casters

Industrial-grade casters with locking mechanism enable repositioning without disassembly.

Identical Arm Medium

HV/LV arms use same dielectric material to maintain 1000:1 ratio during temperature fluctuations.

Quick-Disconnect Structure

Modular design dismantles for transport and reassembles in<20 minutes.="">

Thermal Stability Verification

Rigorous Testing Protocol

Each unit undergoes temperature cycling with capacitance and tanδ measurements at:

1. Ambient temperature (25°C) baseline

2. -20°C after 4-hour stabilization

3. +50°C after 4-hour stabilization

Certified ratio variation<0.1% across="" full="" temperature="" range.="">

Operational Advantages

• Unmatched Measurement Stability:

  <0.1% ratio="" drift="" in="" varying="" environments="">

• Ultra-Low Loss Diagnostics:

  <0.2% tan="">

• True Mobility: 360° rotating casters with 500kg load capacity

• Safety Assurance: Dual insulation levels (275kV HV / 3kV LV)

"The temperature stability eliminates recalibration during day-long tests - we've reduced measurement uncertainty by 60% in outdoor substations."
               - Chief Test Engineer, National Power Laboratory

Field Deployment Protocol

1. Transport: Lock casters during movement on uneven surfaces

2. Positioning: Deploy on level surfaces (max 3° incline)

3. Pre-Test Verification:

• Measure capacitance at ambient temperature

• Verify tanδ

  <0.2%<>

4. Insulation Check: Perform 3kV/1min test on LV arm

5. Operation: Monitor base stability during 250kV tests

6. Post-Test: Measure capacitance/tanδ to confirm stability

Compliance & Certifications

Third-party validated to international standards:

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

• IEC 60270: Partial discharge measurements

• IEEE 4: Standard for HV testing

• ASTM D924: Standard test method for dissipation factor

Includes NIST-traceable temperature stability certification.