High-Voltage Power Capacitor
The LSTHSC series high-voltage capacitors are primarily used to improve power factor, reduce line losses, enhance power grid quality, fully utilize the economic efficiency of power generation and supply equipment, and minimize electrical losses. It is an essential accessory for reactive power compensation in power systems, effectively improving the voltage waveform and stabilizing the grid voltage.
Main Features
The product uses a full-film electrolyte and environmentally friendly, chlorine-free, high-safety insulating oil. Each capacitor component is equipped with a built-in fuse and a built-in discharge resistor.
- The power capacitor consists of a housing, core components, and wiring porcelain posts. The housing is made of stainless steel plates welded together and is sealed to prevent environmental influences. High-strength crimp-type wiring porcelain posts are welded on the housing, and mounting components are welded on both sides of the housing, which also serve as grounding terminals and can be used for transportation.
- The core component is composed of several layers of aluminum foil, polypropylene film winding dielectric, and insulating parts. The elements of the core are connected in series to meet different voltage and capacity requirements.
- Each element inside the power capacitor is equipped with a series fuse. If any element is damaged (e.g., breakdown), the parallel-connected elements discharge the faulty one, causing the fuse to blow (in milliseconds), which isolates the faulty element, allowing the power capacitor to continue operating normally.
Applications
50Hz or 60Hz AC systems with voltages of 1kV and above.
Reactive power compensation in power systems.
Technical Data
Rated Voltage: 1kV and above
Rated Frequency: 50Hz / 60Hz
Rated Capacity: Determined by system compensation requirements
Rated Capacitance: Calculated from rated capacity, rated voltage, and rated frequency
Insulation Level BIL: Determined by installation method
Operating Temperature: -25°C to +55°C
Altitude: ≤1000m
Relative Humidity: ≤90%
Surrounding Conditions: No harmful gases or flammable/explosive materials, with good ventilation
Long-term Operating Voltage: 1.1Un
Short-term Overvoltage Capability: 1.15Un for 30 minutes per 24 hours, 1.2Un for 5 minutes, 1.3Un for 1 minute
Transient Overvoltage Withstand: First peak value >2.2Un for half a cycle
Overcurrent Capability: 1.3In, up to 1.37In for capacitors with maximum positive deviation
Capacitance Deviation: -5% to +5%
Residual Voltage after Power-off: Reduced from √2Un to below 50V within 5 minutes
Loss Tangent: tg δ ≤ 0.0003
Manufacturing Standard: IEC60871 or others as needed