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>400kV Range

LQHDR1250kV/5kΩ/1A Damping Resistor: Ultra-High Voltage Cyclic Operation with ONAN Cooling

Technical specifications for the LQHDR1250kV/5kΩ/1A damping resistor featuring ONAN cooling, 20 cycles/day operation, and non-destructive failure mode.


  • US$0.00 Negotiated Price
  • Lead time: 60days

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Product Details

Product Tags

LQHDR1250kV/5kΩ/1A Damping Resistor: Cyclic Duty Excellence

Electrical Specifications

ParameterValueStandard
Rated Voltage1250kV ACIEC 60273
Nominal Resistance5kΩ ±0.5%IEEE 4-2013
Rated Current1AIEC 60076
Power Rating5kWThermal Class H
Frequency50HzIEC 60060-1

Cyclic Operation Capability

  • On/Off Cycle: 5 minutes ON / 30 minutes OFF

  • Maximum Cycles: 20 per 24-hour period

  • Duty Factor: 14.3% (optimized for rapid testing sequences)

Designed for high-frequency test environments requiring repeated ultra-high voltage applications.

ONAN Cooling System

ComponentSpecification
Oil Volume320L mineral oil (IEC 60296)
Radiator Surface12m² corrugated fins
Cooling Capacity5kW heat dissipation
Oil Replacement5-year interval

Thermal Performance & Safety

  • Temperature Rise: <100K during continuous operation

  • Structural Integrity: Maintained at operational temperatures

  • Fault-Tolerant Design: Non-damaging insulation failure during breakdown events

  • Rapid Cooldown: 30-minute off-period reduces temperature by 70%

Cyclic Duty Applications

  • High-volume transformer impulse testing

  • Automated production line quality control

  • Research facility stress testing sequences

  • Lightning protection component validation

  • UHV circuit breaker endurance testing

Operational Protocol

  1. Pre-cycle insulation resistance test (min 100GΩ at 10kV DC)

  2. Maximum 20 cycles per 24-hour period

  3. Strict adherence to 30-minute cooldown periods

  4. Monthly dissolved gas analysis (DGA) of oil

  5. Annual dielectric strength verification at 1500kV

Robust Safety Features

  • Pressure-relief diaphragm for overpressure events

  • Triple-barrier insulation system

  • Creepage distance: 35mm/kV (43.75m total)

  • Corona-free design up to 1400kV

  • Ground fault monitoring with automatic disconnect

Compliance Standards

  • IEC 60273: High-voltage resistors

  • IEEE 4-2013: HV testing techniques

  • EN 60076-14: Liquid-immersed equipment

  • IEC 61010-1: Safety requirements

  • ASME BPVC Section VIII: Pressure vessel standards

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