Robust Protection for High-Voltage Systems

The LQHDR protecting resistor delivers 5kW power handling at 20kV/1A with industrial-grade durability. Featuring nickel-chromium wire wound on an epoxy pipe and ≤80K temperature rise, it provides critical protection for:

• Transformer divider circuits

• High-voltage test equipment

• Power transmission monitoring systems

• Impulse voltage generators

Technical Specifications

Robust Construction

Epoxy Pipe Core Design

Nickel-chromium resistance wire precision-wound on high-grade epoxy pipe provides:

• Dielectric strength >30kV/mm

• Thermal stability up to 200°C

• Mechanical vibration resistance

⌀150mm

↓

450mm

Divider Connection System

Integrated connecting tubes enable direct mounting to transformer dividers with:

• HV bushing compatibility

• Thermal expansion compensation

• Corrosion-resistant flanges

Cyclic Operation Capability

Industrial Duty Cycle

Designed for 4 daily cycles of 1-hour full-power operation (20kV/1A) followed by 1-hour cooldown period.

Thermal Management

Optimized airflow design maintains surface temperature rise ≤80K during continuous operation at 100% load:

• Axial cooling fins

• 6m/s natural convection rating

• Thermal cut-off at 150°C

Industrial Applications

Transformer Divider Protection

Prevents voltage transients in measurement dividers during:

• Lightning impulse tests

• Switching surge measurements

• DC withstand voltage tests

HV Test Equipment

Provides current limiting and damping in:

• Cable fault locators

• Circuit breaker test sets

• Insulation resistance testers

Installation Requirements

• Mounting: Horizontal position with 300mm clearance

• Connections: 35mm² cables with M16 compression lugs

• Environment: Indoor (IP54) or outdoor with canopy

• Safety: Grounding strap connection mandatory