Ultra-Low Noise Solution for Critical Test Environments

The LQHDR 50kV/5kΩ/0.05A damping resistor delivers exceptional signal integrity with partial discharge levels below 5pC when integrated into measurement systems. Designed for PD detection, transformer testing, and research applications, this precision component features optimized thermal management in a compact Ø100×350mm package weighing under 5kg.

Technical Specifications

Precision Performance Features

Ultra-Low PD Measurement

Specialized field-grading design ensures partial discharge below 5pC when tested within the measurement system, eliminating interference in sensitive IEC 60270-compliant PD detection circuits.

Low-Current Precision

Optimized for 0.05A applications with ±0.5% resistance tolerance and ±50ppm/°C temperature coefficient, maintaining accuracy in precision measurement systems.

Lightweight Construction

Compact Ø100×350mm cylinder weighing under 5kg enables flexible integration in mobile test labs and confined spaces without performance compromise.

Duty Cycle Operation

Operational Protocol (per IEEE 4-2013):

1. Operate at 100% rated voltage (50kV) and current (0.05A) for 15 minutes maximum

2. Cooling period: Minimum 45 minutes at zero load

3. Maximum 8 cycles per 24-hour period

⚠️ Critical Note: PD measurement requires system-integrated testing per IEC 60270. Standalone measurements may not reflect actual performance.

Physical Dimensions

Compact Design: Ø100mm × 350mm Height

Mounting: Gold-plated M8 terminals with 50mm creepage

Weight: 4.7kg (including terminals)

Figure: Space-efficient design for laboratory and field use

Industrial Applications

• PD Measurement Systems: Reference impedance for partial discharge detectors (per IEC 60270)

• Transformer Testing: Damping resistor for sensitive induced voltage tests (IEC 60076-3)

• Research & Calibration: Precision load for HV laboratory equipment validation

• Cable Diagnostics: Waveform control in 50kV VLF testing systems

Validation Data: Achieved 0.1% measurement uncertainty in 50kV calibration systems.

Compliance & Safety

• Dielectric Strength: 90kV/min (IEC 61010-1)

• Environmental Rating: IP52 (dust protected)

• Safety Standards: CAT III 1000V

• EMC Compliance: EN 61326-1 for laboratory use

Non-inductive winding eliminates magnetic interference in sensitive measurements.