High-Resolution Measurement for Demanding Applications

The LQHVF 300kV/2000pF sets new standards in high-voltage precision with its exceptional 3500:1 ratio and extended-duty operation capability. Engineered for critical power system testing and calibration laboratories, this solution delivers:

• Ultra-high 3500:1 ratio for 85.7V equivalent at 300kV

• Continuous operation at 225kV (75% rated voltage)

• Ultra-low dielectric loss (

  <0.2%) 20="" at="">

• 330kV insulation withstand (110% rated voltage)

Extended Duty Operation

Unlimited operation at 225kV combined with 1-hour rating at 300kV provides unmatched flexibility for long-duration tests.

Technical Specifications

100%

300kV operation

60 minutes maximum

75%

225kV operation

Continuous duty

50Hz

→

300Hz

Precision Design Features

Ultra-Low Loss Capacitors

Special dielectric formulation achieves<0.2% 20="" loss="" at="">

Removable Corona Rings

Aerospace-grade aluminum alloy rings prevent discharge at 300kV+.

Stabilized Removable Base

Engineered pedestal with seismic restraints and vibration damping.

Scalable HV Connection

Corona-free connectors for single (300kV) or series (600kV) configurations.

Extended Duty Performance

Continuous Operation Capability

Maintains ≤±1% accuracy during unlimited operation at 225kV (75% rated voltage) - ideal for long-duration tests like:

• 72-hour transformer temperature rise tests

• Extended cable aging studies

• Continuous power quality monitoring

High-Resolution Measurement

3500:1 ratio delivers 85.7V equivalent at 300kV - enabling detection of micro-discharges and nanosecond transients.

Industry Applications

Calibration Laboratories

Reference standard for calibrating 300kV+ measurement systems with NIST-traceable accuracy.

Transformer Manufacturing

Extended induced voltage tests on 500kV transformers with continuous monitoring.

Research Facilities

Long-duration dielectric studies and material aging research at controlled voltages.

Operational Advantages

• Unmatched Resolution: 3500:1 ratio enables new measurement capabilities

• Extended Operation: Unlimited runtime at 225kV reduces test interruptions

• Thermal Stability: ≤0.05% ratio drift during voltage transitions

• Frequency Flexibility: Consistent accuracy from 50-300Hz

"The continuous operation at 225kV allowed us to complete 72-hour transformer tests without interruption - eliminating measurement gaps that previously affected our data accuracy."
               - Chief Engineer, Power Transformer Facility

Installation & Operation Protocol

1. Site Preparation: Level surface with 6m clearance

2. Assembly: Secure corona rings using alignment markers

3. Grounding: Dual 35mm² cables to independent ground

4. Configuration:

• Select single-stage (300kV) or series (600kV)

• Connect via special lead-wire to VF source

5. Voltage Selection:

• 300kV: Max 60 minutes continuous

• 225kV: Unlimited operation

6. Safety: Maintain 7m clearance during 330kV tests

Compliance & Standards

Certified to highest precision standards:

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

• IEEE 4: Standard for HV testing

• ISO/IEC 17025: Testing laboratory competence

• ASTM D150: Standard test methods for AC loss

Includes NIST-traceable calibration certificate.