is provided by current transformers t2 t4 and t6 on the load side of distribution lines switches 12 14 and 16 rectifiers associated with these current transformers formers or phase transformers t2 t4 and t6 are not shown in this figure nor is the connection between the rectified output of the phase transformers and power capacitor c1 shown the switchgear control 24 of the present invention may omit two of the three alternate sources of power for the switchgear control 24 however preferred forms of switchgear control 24 will employ at least two alternate sources of power for greater reliability switchgear control 24 is shown in greater detail in fig2 the standby power source charging power capacitor c1 39 may be a potential transformer such as that shown as t1 in fig1 or a station battery with or without an associated charging circuit similar to that shown as b1 in fig1 current transformers t2 t4 and t6 are used both for monitoring the individual phase currents in the distribution line and for maintaining the state of charge on power capacitor c1 39 when the control is in a quiescent state the phase transformers t2 t4 and t6 are arranged in a star configuration so that they produce signals representing the current in each phase and ground of the distribution line phase transformer t2 output.