>400kV Range
LQHDR1250kV/5kΩ/1A Damping Resistor: Cyclic Duty Excellence
Electrical Specifications
Parameter | Value | Standard |
---|---|---|
Rated Voltage | 1250kV AC | IEC 60273 |
Nominal Resistance | 5kΩ ±0.5% | IEEE 4-2013 |
Rated Current | 1A | IEC 60076 |
Power Rating | 5kW | Thermal Class H |
Frequency | 50Hz | IEC 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
Component | Specification |
---|---|
Oil Volume | 320L mineral oil (IEC 60296) |
Radiator Surface | 12m² corrugated fins |
Cooling Capacity | 5kW heat dissipation |
Oil Replacement | 5-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
Pre-cycle insulation resistance test (min 100GΩ at 10kV DC)
Maximum 20 cycles per 24-hour period
Strict adherence to 30-minute cooldown periods
Monthly dissolved gas analysis (DGA) of oil
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