150kV ~ 400kV
LQHDR Series 300kV/2kΩ/3A High Voltage Damping Resistor
Technical Specifications
Parameter | Value | Standard |
---|---|---|
Rated Voltage | 300kV RMS | IEC 60060-1 |
Nominal Resistance | 2kΩ ±5% | IEC 60115 |
Rated Current | 3A continuous | |
Rated Power | 18kW @ 50Hz | |
Partial Discharge (PD) | <3pC at 300kV | IEC 60270 |
Operating Cycle | 30min ON / 60min OFF | |
Temperature Rise | ≤80K at full load | IEC 60076 |
Insulation Level | 400kV BIL | ANSI C37.90 |
Cooling Method | Natural convection |
Design Features
Low-Inductance Construction for transient response (di/dt > 109 A/s)
Stable TCR: <200 ppm/°C (-40°C to +85°C)
Corona-Free terminal design with silicone corona rings
Non-inductive Winding: Bifilar technique for RF applications
Environmental Protection: IP54 rated enclosure standard
Application Scenarios
High Voltage Laboratories
Essential for impulse voltage generators and HV divider circuits where wavefront control is critical
Power System Testing
Used in switchgear PD testing and transformer resonant test systems
Industrial Processes
Voltage stabilization in HVDC transmission systems and X-ray generator circuits
Safety Compliance
Dielectric strength tested to 450kV AC for 1min
Short-circuit withstand: 25kA/0.5s (IEC 62271)
Flame-retardant housing (UL94 V-0 rated)
Electromagnetic compatibility per EN 61326-1
Installation Guidelines
Maintain minimum clearance of 1.5m to grounded surfaces
Mount vertically using M16 flange terminals (torque: 45Nm ±5%)
Ensure ambient temperature <40°C with adequate ventilation
Connect ground lug to low-impedance earth (<5Ω)
Maintenance Protocol
Activity | Frequency |
---|---|
Insulation Resistance Test | Every 500 operating hours |
Terminal Torque Check | Annual |
Surface Decontamination | After exposure to pollutants |
Full Power Test | After 5,000 operating cycles |