DC Filters

The DC filter is mainly composed of high voltage capacitor, high voltage reactor, low voltage capacitor, low voltage reactor and other components. According to the object of DC filter protection, differential protection and detuning protection are set for the whole filter. Unbalance protection, overload protection and bridge difference overcurrent protection are provided for high voltage capacitors. The inverse time overcurrent protection is provided for the high voltage reactor. Overload protection is provided for low voltage resistors/reactors.