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150kV ~ 400kV

LQHDR 400kV/1kΩ/4A High Voltage Damping Resistor | 16kW Industrial Powerhouse

Heavy-duty LQHDR 400kV/1kΩ/4A damping resistor with 16kW power capacity. Designed for 60min continuous operation at full 400kV/4A rating. Features <100K temperature rise and fail-safe insulation protection.


  • US$ 4,919.00
  • Lead time: 45 days

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Product Details

Product Tags

LQHDR Series 400kV/1kΩ/4A High Power Damping Resistor

Core Technical Specifications

ParameterValueVerification
Rated Voltage400kV AC RMSIEC 60060-1
Nominal Resistance1kΩ ±1%IEC 60115-1
Rated Current4A continuous
Power Rating16kW @ 60HzP = I2R = 42 × 1000 = 16kW
Duty Cycle60min ON / 90min OFF
Temperature Rise≤100K at full loadIEEE C57.12.90
Thermal StabilityNo structural degradation at max temp
BIL Rating650kVIEC 60071
Partial Discharge<5pC @ 400kVIEC 60270

Robust Safety Engineering

Fail-Safe Insulation

  • Triple-layer encapsulation: RTV silicone + mica tape + epoxy

  • Non-cascading failure design

  • Arc-quenching matrix in core structure

Thermal Protection

  • Temperature-independent mechanical strength

  • Overheat cutoff at 150°C surface temp

  • Thermal runway prevention circuit

Safety Certification: Compliant with IEC 61936 for HV installations

Advanced Cooling System

  • Multi-path Cooling: Radial fins + axial airflow channels

  • Phase-change Material: Integrated thermal buffer capsules

  • High-emissivity Surface: Black ceramic coating (ε=0.92)

  • Thermal Performance: 100K rise at 16kW with 25°C ambient

Electrical Performance

CharacteristicValue
Inductance<5μH
di/dt Capability>1010 A/s
Step Response<15ns 10-90% rise time
TCR±150 ppm/°C (-40°C to +150°C)
Overload Capacity125% for 5min (20kW)
Frequency ResponseDC - 20MHz (±3dB)

Industrial Applications

Power Generation

Surge suppression in 500MW+ turbine generators and HVDC converter stations

High Power Testing

Critical component for 400kV impulse generators and transformer test rigs

Grid Infrastructure

Protection for ultra-high voltage substations (345kV+) and reactive power compensation systems

Mechanical Design

Construction

  • Modular segmented design

  • Stainless steel core with copper cladding

  • Corona-free graded rings

Terminal System

  • Top: Ø800mm corona shield

  • Base: Dual M24 flange terminals

  • Torque spec: 80Nm ±5%

Environmental Rating: IP55 (indoor/outdoor operation)

Installation Protocol

  1. Maintain minimum 3.2m clearance (8mm/kV × 400kV) to earthed surfaces

  2. Mount on insulated platform rated for 500kV

  3. Use corona-free connectors with smooth radius profiles

  4. Ground connection: ≥50mm² copper cable to &lt 1Ω earth grid

  5. Implement thermal monitoring with IR sensors

Safety & Compliance

  • Dielectric test: 480kV AC for 1min (20% overvoltage)

  • Short-circuit withstand: 40kA peak/100ms

  • Arc-flash protection: Class 3 containment

  • Seismic rating: IEEE 693 Category II

  • Material safety: RoHS 3 / REACH SVHC-free

Operational Parameters

ConditionRequirement
Ambient Temperature-30°C to +45°C
Relative Humidity&lt 90% non-condensing
Altitude&lt 1500m ASL (derate 1%/100m above)
Cooling Recovery120min after full-duty cycle

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