Laboratory-Grade Performance for Critical Measurements

Engineered for precision high-voltage applications, the LQHDR 70kV/5kΩ/0.07A damping resistor delivers ultra-low partial discharge (LT 3pC) performance essential for transformer testing, dielectric analysis, and calibration systems. With optimized thermal management and IEC-compliant construction, it ensures measurement integrity at 70kV levels.

Technical Specifications

Operational Performance

⏱️ Duty Cycle

• Full load operation: 60 minutes continuous @ 70kV/0.07A

• Sustained operation: Continuous @ 80% rated voltage/current (56kV/0.056A)

🔥 Thermal Management

• Max. temperature rise: ≤80K @ 100% load (resistor body)

• Thermal recovery: 30-minute cooldown between full-load cycles

Precision Advantage: The industry-leading LT 3pC PD level ensures minimal measurement noise during sensitive tests like transformer partial discharge analysis per IEC 60270 standards.

Critical Applications

🔬 High-Voltage Calibration

Reference component for calibrating 70kV measurement systems with NIST-traceable accuracy.

⚡ Transformer PD Testing

Ensures LT 3pC background noise during critical partial discharge measurements on power transformers.

🧪 Dielectric Research

Provides stable damping for material breakdown testing at 70kV with minimal interference.

Precision Design Features

• Low-inductance winding: Air-core design with LT 0.1μH residual inductance

• Triple-shielded enclosure: Electromagnetic interference suppression for PD measurements

• Precision resistance elements: Military-grade wire with ±0.5% tolerance

• Corona-free terminals: Silicone-insulated connectors rated for 100kV BIL

• Thermal monitoring port: Integrated PT100 sensor interface

Safety & Handling Protocol

1. Maintain minimum 0.7m clearance (10mm/kV rule)

2. Verify ground connection LT 0.1Ω before energizing

3. Use IR thermometer to monitor surface temperature (max 80°C)

4. Allow 30-minute cooldown between full-load tests

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

Maintenance & Calibration

• Quarterly resistance verification (±0.5% tolerance)

• Annual PD performance validation per IEC 60270

• Biannual dielectric test: >5000MΩ @ 10kV DC

• 5-year recalibration with NIST-traceable certification