LQHV-420 Vacuum Interrupter Test Set – Accurate Vacuum Measurement for High-Voltage Switches

The LQHV-420 Vacuum Interrupter Test Set is a specialized instrument for quantitative vacuum measurement in high-voltage vacuum switches. Unlike traditional power-frequency withstand voltage methods, it detects early-stage vacuum degradation (up to 10^-5 Pa sensitivity) without removing the switch, ensuring reliable preventive maintenance.

Technical Parameters

Limitations of Traditional Vacuum Testing Methods

Conventional power-frequency withstand voltage tests only identify severe vacuum degradation (10^-2–10^-1 Pa), missing early warnings. The LQHV-420 solves this with advanced magnetron discharge technology.

Key Advantages Over Legacy Approaches:

• Early Detection: Identifies vacuum loss before critical failure.

• Non-Invasive: No need to disassemble the switch.

• Quantitative Results: Precise measurements, not pass/fail judgments.

How the LQHV-420 Works

Using a proprietary excitation coil and microprocessor-controlled data processing, the tester applies the magnetron discharge method to:

• Measure vacuum levels in arc chambers quantitatively.

• Detect degradation as subtle as 10^-5 Pa.

• Operate synchronously with switches for real-time analysis.

Product Features

• No Disassembly Required: Tests vacuum switches in situ.

• High Accuracy: Microprocessor ensures reliable data.

• Data Management: Save, print, and review test records.

• Portable Design: Lightweight for field use.

• Wide Compatibility: Works with all major vacuum switch models.

Industry Applications

Ideal for preventive maintenance in:

• Power Utilities: Ensure grid reliability.

• Industrial Plants: Steel, petrochemical, and textile facilities.

• Transportation: Railway electrification systems.

• Mining: Coal industry high-voltage infrastructure.

Technical Specifications

By replacing subjective power-frequency tests with quantitative data, the LQHV-420 enhances safety and reduces downtime in critical high-voltage systems.