Precision Component for Critical HV Measurements

The LQHDR 200kV/5kΩ damping resistor sets new standards in high-voltage testing with its exceptionally low partial discharge (PD) characteristics. Engineered for 50Hz systems at 200kV rated voltage, this specialized component minimizes electrical noise during sensitive dielectric tests while maintaining thermal stability under continuous 1-hour operation. Essential for utilities, certification labs, and transformer manufacturers requiring uncompromised measurement accuracy.

Technical Specifications

*Calculated: P = I²R = (0.1A)² × 5kΩ = 50W

Performance Advantages

Ultra-Low Noise Measurement

With PD levels ≤2pC at 200kV - 5x lower than industry standards - this resistor eliminates measurement interference during precision dielectric testing. Exceeds IEC 60270 requirements for partial discharge detection in transformers and cables.

Thermal Reliability

Maintains ≤80K surface temperature rise during full-load operation, preventing resistance drift. Proprietary cooling design ensures stable performance throughout 1-hour test cycles.

High-Voltage Integrity

Optimized for 50Hz systems with corona-free construction. Voltage grading technology prevents surface tracking even in high-humidity environments.

Key Applications

• Transformer PD Testing – Critical for IEC 60076-27 compliance measurements

• HV Cable Diagnostics – Dampens reflections in TDR/VLF test systems

• Circuit Breaker Testing – Provides stable load for timing and contact resistance tests

• Research & Certification Labs – Reference component for calibration of PD measurement systems

Installation & Safety Guidelines

Mounting Requirements

• Minimum clearance: 1.5m to grounded surfaces

• Use silicone-insulated HV leads (≥200kV rating)

• Grounding terminal must be bonded to test bench earth

Operational Precautions

• Pre-heat for 15 minutes at 10% rated voltage before full-load tests

• Monitor temperature with IR thermometer during extended operation

• Allow 2-hour cooldown between test cycles

Complies with IEC 61010-1 safety standards for HV test equipment.

Why Choose LQHDR for Precision HV Testing?

Compared to Standard Resistors

• ▶ 80% lower PD noise than conventional wirewound resistors

• ▶ 40% faster thermal recovery between tests

• ▶ Validated for calibration labs (ISO 17025 traceable)