Abstract: A position sensor includes a first part having several electrically conductive elements, a second part having an electrical conductor, and holding device holding the first part and the second part together with the conductive elements and the conductor being spaced apart and permitting relative movement between the conductive elements and the conductor. Included is a signal generator for generating and supplying different electrical signals to one of the first part and the second part for reception in a contactless manner by the other of the first part and the second part with a magnitude that is dependent upon the relative position between the conductive elements and the conductor. There is also a signal detector connected to the other of the first part and the second part for differentiating the electrical signals received thereby to determine the relative position between the conductive elements and the conductor.

Abstract: A position sensor comprises a first part having several electrically conductive elements, a second part having an electrical conductor, and holding means holding the first part and the second part together with the conductive elements and the conductor being spaced apart and permitting relative movement between the conductive elements and the conductor. Included is a signal generator for generating and supplying different electrical signals to one of the first part and the second part for reception in a contactless manner by the other of the first part and the second part with a magnitude that is dependent upon the relative position between the conductive elements and the conductor. There is also a signal detector connected to the other of the first part and the second part for differentiating the electrical signals received thereby to determine the relative position between the conductive elements and the conductor.

Abstract: An electrical power supply system firstly includes a power cable electrically connected to a power source. The power cable has a power line and a first conductor; the first conductor is isolated from the power line and acts as a sensing line. The power cable also has a second conductor and the second conductor is isolated from the sensing line and acts as a neutral line; the power line, the sensing line and the neutral line are electrically connected to the power source. The system further includes an arc fault circuit interrupter including a sensing circuit in electrical connection with the sensing line for detecting an arc fault and a voltage source being in electrical connection with the sensing line. The voltage of the voltage source is designed to be below the hazardous voltage according to the electrical safety rules.