Patent ID: 7800877

Claim:
An electronic power supply device ( 10 ) for supplying power to a low-voltage load ( 30 ), comprising: a transformer ( 60 ); a detecting device ( 100 , 105 ) for detecting an electrical fault, wherein the detecting device comprises a first detector ( 105 ) for detecting a drop in the input voltage u N of the electronic power supply device below a first threshold value, the first detector being electrically connected to the transformer; and a limiting device ( 90 ) allocated to the detecting device ( 100 , 105 ), for limiting the output current of the power supply device to a first predetermined value, wherein a current setting device ( 95 ) is provided which, in response to the detection of the electrical fault, sets the output current to a second predetermined value which is greater than the first predetermined value for a predetermined time, in such a manner that a protective device ( 50 ) allocated to the electronic power supply device ( 10 ) can be reliably tripped, and the limiting device ( 90 ) is constructed for limiting the output current to the first predetermined value after the predetermined time has elapsed, wherein the limiting device and the current setting device are part of a current control device.