Abstract: A device and method for fuse protection of a line includes at least two sensors for sensing a corresponding electric variable in a first location and a second location along a conductor line, and for outputting a corresponding first value and second value of the electric variable at the first and second locations, respectively. An evaluation unit evaluates the generated first and second values in order to generate an evaluation result. The evaluation unit controls, based on the evaluation result, an isolating element to cause the isolating element to interrupt a current flow in the conductor line.

Abstract: A method and device for determining an insulation variable of a network. The method may comprise measuring a first voltage at the network, connecting the auxiliary system to the network, measuring a second voltage at the network, disconnecting the auxiliary system from the network, measuring a third voltage at the network, and determining the insulation variable based on the first voltage, the second voltage, and the third voltage.

Abstract: The invention relates to a method and to a circuit arrangement for determining an insulation variable of a network, wherein the measuring system is temporarily connected to the network and a reference point. The method comprises the following steps: measuring a first voltage at the network when the measuring system is not connected to the network; connecting the measuring system to the network, measuring a second voltage at the network, disconnecting the measuring system from the network, measuring a third voltage at the network, and determining an insulation variable based on at least one element of the measuring system, the first voltage, the second voltage, and the third voltage.

Abstract: A device and method for fuse protection of a line includes at least two sensors for sensing a corresponding electric variable in a first location and a second location along a conductor line, and for outputting a corresponding first value and second value of the electric variable at the first and second locations, respectively. An evaluation unit evaluates the generated first and second values in order to generate an evaluation result. The evaluation unit controls, based on the evaluation result, an isolating element to cause the isolating element to interrupt a current flow in the conductor line.