LQHDR 500kV/2.5kΩ/2A Damping Resistor: Advanced Solution for High-Power Testing

Engineering Overview

The LQHDR 500kV/2.5kΩ/2A damping resistor delivers exceptional performance in high-voltage test environments requiring precise power handling and ultra-low partial discharge. Designed for demanding applications in transformer testing, impulse generators, and HVDC systems, this resistor combines robust thermal management with industry-leading electrical characteristics.

Technical Specifications

Core Performance Features

Multi-Frequency Capability

Engineered for global applications with optimized performance at:

• Standard power frequencies (50/60Hz)

• Enhanced testing ranges (100/120Hz)

• Constant resistance tolerance (±0.5%) across all frequencies

Thermal Management System

• Advanced cooling fins maintain <100K temperature rise

• Ceramic-encased resistive elements for heat distribution

• Derating-free operation at 10kW for 60-minute intervals

Partial Discharge Control

The <3pC PD rating at 500kV ensures:

• Accurate measurements in sensitive transformer tests

• Elimination of electromagnetic interference (EMI)

• Prevention of insulation degradation

Design Innovations

Electrical Construction

• Non-inductive bifilar winding technique

• Graded capacitance shielding rings

• Corona-resistant silicone coatings

Mechanical Durability

• Stainless steel structural framework

• UV-resistant polymer housings

• Vibration-damping mounting system

Critical Applications

Transformer Testing Systems

• Induced voltage tests (IVT) at 100-120Hz

• Partial discharge measurement circuits

• Lightning impulse wavefront control

Specialized Test Environments

• HVDC valve commissioning

• Gas-insulated substation (GIS) diagnostics

• Cable factory acceptance testing

Operational Guidelines

Installation Requirements

• Minimum clearance: 4.2 meters (500kV applications)

• Vertical mounting for optimal convection cooling

• Ambient humidity: <70% non-condensing

Maintenance Protocol

1. Infrared thermography before/after 10kW operations

2. Bi-annual resistance verification (±1% tolerance)

3. Annual PD measurement validation

Performance Comparison

Why This Resistor?

• Industry-leading 10kW power handling at 500kV

• Unique multi-frequency capability (50-120Hz)

• Certified <3pC partial discharge performance

• Robust thermal design for <100K temperature rise

Conclusion

The LQHDR 500kV/2.5kΩ/2A damping resistor sets new benchmarks for high-voltage testing equipment with its unprecedented 10kW power rating, multi-frequency operation, and ultra-low partial discharge characteristics. Its optimized thermal management and strict compliance with IEC/IEEE standards make it indispensable for utilities, testing laboratories, and manufacturers requiring maximum reliability in extreme electrical environments.