Device for electric circuit monitoring, circuit arrangement for supplying a load and method for operating a circuit arrangement

The invention relates to a device for the electric circuit monitoring of a load circuit comprising at least one electric load (18), wherein two supply voltage connections (11, 12) are connected via current paths that each comprise a switch (19, 20) to two load connections (16, 17). The potential of an additional voltage source (22) can be applied to one of the load connections (16, 17) by means of a further switch (24). Control means are used to open the two switches (19, 20) in the current paths (14, 15) and to close the further switch (24) during test intervals. Signal means are used to generate error signals when a current through the further switch (24) is detected that is above a predefinable or predefined current flow. The invention further relates to a circuit arrangement for supplying a load and to a method for operating a circuit arrangement.