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150kV ~ 400kV

LQHDR 300kV/2kΩ/3A High Voltage Damping Resistor | 18kW Industrial Grade

Industrial-grade LQHDR 300kV/2kΩ/3A damping resistor with 18kW power rating. Features <3pC partial discharge, 80K max temperature rise, 30min continuous operation. Ideal for HV labs and switchgear testing.


  • US$ 4,489.00
  • Lead time: 30 days

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Product Details

Product Tags

LQHDR Series 300kV/2kΩ/3A High Voltage Damping Resistor

Technical Specifications

ParameterValueStandard
Rated Voltage300kV RMSIEC 60060-1
Nominal Resistance2kΩ ±5%IEC 60115
Rated Current3A continuous
Rated Power18kW @ 50Hz
Partial Discharge (PD)<3pC at 300kVIEC 60270
Operating Cycle30min ON / 60min OFF
Temperature Rise≤80K at full loadIEC 60076
Insulation Level400kV BILANSI C37.90
Cooling MethodNatural 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

  1. Maintain minimum clearance of 1.5m to grounded surfaces

  2. Mount vertically using M16 flange terminals (torque: 45Nm ±5%)

  3. Ensure ambient temperature <40°C with adequate ventilation

  4. Connect ground lug to low-impedance earth (<5Ω)

Maintenance Protocol

ActivityFrequency
Insulation Resistance TestEvery 500 operating hours
Terminal Torque CheckAnnual
Surface DecontaminationAfter exposure to pollutants
Full Power TestAfter 5,000 operating cycles

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