it is designed to control the power factor reactive current (VAr) of a generator whilst running in parallel with the mains utility. The PFC3 is also equipped with a voltage matching facility for use with automatic synchronisation equipment. This dispenses with the need for motorised potentiometers and allows a lower cost synchroniser to be used. The PFC3 can also be connected to provide power factor correction of the incoming mains feeder by using the generator to supply the reactive current. A current limiting facility is provided to prevent generator overload.
below is the wiring conneting mounting.please check carefully.