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Advantage
The design of a tuned filter cabinet is used for power factor compensation in power grids that generate harmonics,as well as amplification to suppress harmonics.
Each section of the tuned filter cabinet is composed of a capacitor and a reactor connected in series, forming as series resonant circuit The resonant frequency of the capacitor and reactor is tuned to be lower than the lowest harmonic present in the power grid, usually the fifth order (250Hz).
Below the tuning frequency of the resonant circuit, such as the fundamental frequency (50Hz), the tuning filter is capacitive and emits reactive power to the power grid. If the tuning frequency is higher than the tuning frequency, the tuning filter is inductive,which mean it will not amplify other ordinary harmonics including 5th, 7th , and 11th order. Tuned filters can also absorb a portion of the low order harmonics in the power grid, ranging from 20% to 50%.
Similar to conventional capacitor banks, each tuned filter is controlled by an automatic power factor controller to switch according to the reactive power requirements.
Parameter
System voltage: 220-1000V
Rated capacity: 120-450KVAR/cabinet
Resonant frequencies: 130Hz, 141Hz, 189Hz, 204Hz. Other frequencies can be provided as needed.
Installation Location: Indoor
Compliant with standard: IEC60831 EN60439-1
Color: Light gray RAL7032 or customized according to customer needs
Temperature range: minimum 0°C, maximum 45 °C, 24-hour average maximum+35 °C, annual average maximum+25 °C Protection level: IP20
Scope of application: The automatic switching and tuning filter cabinet is suitable for power systems with stable load changes and low harmonic content
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