Critical Transient Suppression for HV Systems

Specialized damping resistors like the LQHDR 150kV/5kΩ model protect high-voltage equipment from destructive transient oscillations. By converting electromagnetic energy into heat, they prevent arc flashes and voltage spikes in circuits exceeding 100kV.

Technical Specifications

Key Performance Features

• Non-Inductive Design: Minimizes phase shift in measuring circuits

• Thermal Stability: ±0.5% resistance drift at full load

• Dielectric Strength: 250kV impulse withstand (1.2/50μs wave)

• Cooling Recovery: 2-hour cool-down after maximum operating time

Typical Applications

High-Voltage Laboratories

Prevents reflection waves in impulse voltage generators during dielectric testing per IEC 61083-2.

Power Transformer Stations

Damps switching transients in 138kV+ circuit breakers and capacitor banks.

Medical Imaging Equipment

Suppresses X-ray tube discharge oscillations in 150kV generator circuits.

Installation Requirements

1. Maintain minimum 500mm clearance to grounded surfaces

2. Ambient temperature ≤40°C (derate 3%/°C above)

3. Use corona rings above 100kV applications

4. Verify creepage distance ≥25mm/kV

Compliance & Safety

Designed to meet critical electrical safety standards:

• Dielectric testing: IEC 60060-2

• Partial discharge: <5pC @ 110kV

• Environmental: IP55 (corrosion-resistant housing)

• Safety margins: 200% rated voltage for 1 minute

Maintenance Protocol

Ensure optimal performance with:

• Monthly: Infrared inspection of terminal connections

• Biannual: Resistance tolerance verification

• After 500 operations: Full dielectric strength test

Calibration interval: 24 months (NIST-traceable certification available)