150kV ~ 400kV
LQHDR 250kV/10kΩ/0.08A Damping Resistor: High-Voltage Testing Performance
Precision Damping for Critical HV Applications
The LQHDR 250kV/10kΩ damping resistor delivers reliable oscillation suppression in high-voltage testing circuits up to 250kV. Engineered for 50Hz systems at 0.08A current, this specialized component ensures measurement accuracy during extended test cycles. With its certified 60-minute continuous operation at full load, it's essential for transformer impulse testing, cable diagnostics, and high-voltage research requiring stable performance under demanding conditions.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | LQHDR 250kV/10kΩ/0.08A |
| Rated Frequency | 50Hz |
| Rated Voltage | 250kV |
| Rated Current | 0.08A |
| Nominal Resistance | 10kΩ ±1% |
| Calculated Power Rating | 64W (P = I²R = 0.08² × 10000) |
| Operating Time | 60 minutes continuous at 100% load |
| Compliance Standards | IEC 60060-1, IEEE 4 |
Performance Advantages
High-Voltage Stability
Specialized construction for 250kV systems with corona-free design. Voltage grading technology prevents surface tracking, ensuring reliable operation in humid environments.
Extended Operation Capability
Certified for continuous 60-minute operation at full 250kV/0.08A load - 35% longer duty cycle than standard HV resistors. Proprietary cooling design maintains stable resistance throughout test cycles.
Precision Damping Characteristics
Optimized 10kΩ resistance provides critical damping for:
Lightning impulse wave shaping (1.2/50μs)
Switching surge suppression (250/2500μs)
Partial discharge measurement circuits
Industrial Applications
| Industry | Application | Benefit |
|---|---|---|
| Power Utilities | Transformer impulse testing | Waveform control per IEC 60076-3 |
| Cable Manufacturers | HV cable partial discharge testing | Measurement stability for IEC 60502 compliance |
| Research Facilities | Dielectric strength experiments | Extended test duration capability |
| High-Voltage Labs | Circuit breaker testing | Surge suppression for accurate timing measurements |
Installation & Safety
Mounting Requirements
Minimum clearance: 2.0m to grounded surfaces
Vertical orientation recommended (HV terminal upward)
Grounding: 16mm² copper minimum with secure bonding
Operational Protocols
Pre-heat at 10% voltage for 10 minutes before full-load tests
Monitor surface temperature with IR thermometer during operation
Allow 90-minute cooldown between test cycles
Safety Compliance: Meets IEC 61010-1 requirements for HV test equipment.
Technical Comparison
| Feature | Standard 250kV Resistor | LQHDR 250kV/10kΩ |
|---|---|---|
| Continuous Operation | 30-45 minutes | 60 minutes |
| Current Range | 0.1A minimum | 0.08A precision rating |
| Resistance Tolerance | ±5% | ±1% |
| Waveform Control | Basic damping | Precision impulse shaping |
Maintenance Protocol
Monthly Inspection: Visual check for surface contamination
Quarterly Testing:
Resistance verification (±1% tolerance)
Insulation resistance test (≥1GΩ at 5kV DC)
Annual Recalibration: Traceable to NIST standards
Lifetime: 10,000 operational hours with proper maintenance
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