Dual-Role Solution for Critical High-Voltage Systems

The LQHVF 300kV/300pF redefines precision measurement with its industry-leading 3000:1 voltage ratio and dual-function capability. Engineered for EHV transmission systems and research facilities, this solution delivers:

• Ultra-high 3000:1 ratio for microvolt-level resolution

• Dual functionality: Precision voltage measurement + signal coupling

• Ultra-low partial discharge: <5pC @300kV

• Laboratory-grade accuracy (≤±1%)

Breakthrough Measurement Resolution

With 3000:1 ratio, 300kV measurements resolve to 100V - enabling detection of sub-millisecond transients and micro-discharges imperceptible to standard dividers.

Technical Specifications

Dual-Function Capabilities

As Precision Voltage Divider

3000:1 ratio with ≤±1% error enables:

• Calibration of protection relays

• Transient overvoltage analysis

• Partial discharge localization

• Harmonic distortion measurement

As Coupling Capacitor

300pF capacitance optimized for:

• Secure protection signaling

• Power line carrier (PLC) communication

• SCADA data transmission

• Fault recording synchronization

Precision Design Features

Oil-Immersed Capacitors

High-purity mineral oil provides stable dielectric properties at 300kV.

Removable Corona Rings

Aerospace-grade aluminum alloy prevents discharge at 300kV+.

Modular Arm System

Separable LV/HV arms enable reconfiguration and maintenance.

Stabilized Removable Base

Engineered pedestal with seismic-grade stability.

Ultra-High-Ratio Applications

Research & Development

Nanosecond transient capture in high-energy physics experiments and plasma research.

Protection System Calibration

Precision verification of 300kV+ protective relays with 0.1% resolution.

Partial Discharge Mapping

Localization of micro-discharges in power transformers and GIS systems.

Operational Advantages

• Unmatched Resolution: 100V equivalent at 300kV

• Dual-Function Efficiency: Single device replaces two systems

• Ultra-Low Noise:

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• Thermal Stability: ONAN cooling maintains accuracy

"The 3000:1 ratio revealed transients previously undetectable in our 500kV test bed - revolutionizing our research capabilities."
               - Director, High-Energy Research Facility

Installation & Operation Protocol

1. Site Preparation: Level surface with 5m clearance

2. Assembly: Secure corona rings using alignment markers

3. Grounding: Dual 35mm² cables to station grid

4. Configuration:

• Voltage measurement: Connect to test set

• Coupling function: Terminate to PLC transmitter

5. Pre-Test: Verify PD levels at 240kV

6. Operation: Max 60 minutes continuous at 300kV

7. Safety: Maintain 6m clearance during operation

Compliance & Standards

Certified to international standards:

• IEC 60358-1: Coupling capacitors & capacitor dividers

• IEEE C57.13: Instrument transformer requirements

• IEC 60060-1: High-voltage test techniques

• IEC 60270: Partial discharge measurements

NIST-traceable calibration certificate included.