a protection device for monitoring current in a power cable to an electrical device and for controlling a remotely located starter for the electrical device in response to a system controller . the device includes a transformer magnetically linked with the power cable to produce a voltage signal in response to the presence of a changing current within the power cable . an input circuit located in a single housing together with the transformer is electrically connected to the transformer so as to receive the voltage signal . the input circuit produces , in response to the voltage signal , either a first signal or a first circuit condition at the output terminal of the input circuit , representative of the changing current in the power cable . a switch circuit also in the same container with the transformer has a terminal for sensing either a second signal or a second circuit condition of the remotely located system controller . the switch circuit has a second terminal to provide either a third signal or a third circuit condition effective to control the starter , in response to sensing one of the second signal and the second circuit condition . all of the transformer , the input circuit , and the switch circuit are located in a single unitary package which is easily mounted and adjusted to a desired position .