Robust Protection for Critical HV Systems

The LQHDR 200kV/5kΩ protecting resistor delivers reliable over-voltage and surge protection in high-power electrical systems. Engineered for 50Hz applications at 0.25A current, this industrial-grade component safeguards transformers, switchgear, and testing equipment during fault conditions and operational transients. With its 60-minute continuous operation capability and controlled temperature rise, it ensures system integrity in power utilities, industrial plants, and high-voltage laboratories.

Technical Specifications

Key Performance Features

High-Current Tolerance

Designed for 0.25A continuous current at 200kV, providing reliable protection during voltage surges and switching transients. Exceeds IEC 60099-4 standards for surge protection components.

Thermal Management

Advanced cooling design maintains surface temperature rise below 100K during full-load operation. Proprietary resistive element ensures stable performance without thermal runaway.

Mechanical Robustness

Industrial-grade construction with corrosion-resistant terminals and reinforced insulation. Compact cylindrical design (Ø200mm × 1425mm) withstands vibration in mobile test setups.

Protection Applications

Transformer Testing

Limits inrush current during induced voltage tests per IEC 60076-3. Essential for:

• Impulse voltage testing

• Partial discharge measurements

• Dielectric frequency response analysis

Circuit Protection

Prevents equipment damage in:

• High-voltage switchgear

• Generator excitation systems

• Power capacitor banks

Test Equipment Integration

Critical component for:

• Hipot testers

• Surge generators

• VLF cable test systems

Installation Guidelines

Safety Compliance: Meets IEC 61010-1 safety requirements for HV test equipment.

Maintenance Protocol

• Pre-Test Inspection: Verify terminal tightness and surface cleanliness

• Thermal Monitoring: Use IR thermometer during extended operation

• Annual Verification: Resistance tolerance check (±1%)

• Recalibration: Every 2 years or 500 operating hours

Technical Comparison