Abstract: 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.

Abstract: A pressure sensor system includes a first conductive surface electrically isolated from a second conductive surface. A dielectric material is interposed between the first conductive surface and the second conductive surface. The dielectric material is movable with respect to at least one of the first conductive surface and the second conductive surface in response to a change in pressure exerted on the pressure sensor. A measurement system is connected to at least one of the first conductive surface and the second conductive surface to measure the capacitance between the first conductive surface and the second conductive surface representative of pressure.