Apparatus and method for the limitation of the rails potential in the case of a current path of the same

摘要

The invention relates to a device and a method for the limitation of the rails in the case of a potential which is equal to current path, wherein a low-resistance connecting line (4) between the rail (1) and the building ground (2) is arranged. In the connecting line (4) is a switching device (6), via a control line with a between the rail (1) and the building ground (2) arranged voltmeter (3) in communication. It is provided that the switching device (6) has a thyristor (5), with the ignition input of the voltmeter (3) in communication. In the connecting line (4) is a current strength of the knife (7), which via a control unit (8) with the ignition input of the thyristor (5) is connected which, to the value of the current has fallen below a threshold value of the thyristor (5) is ignited continuously anew.