Abstract: A control circuit and a method for controlling a control circuit are described. The control circuit is connected to at least two electrical loads connected in parallel. An electric melting metal fuse is connected in series with each electrical load. The method comprises: monitoring the total current provided to the electrical loads and in case the total current from the control circuit during normal operation exceeds a nominal preset current limit, providing one of: a first electric pulse to the loads during a preset first time period at a current which is higher than the nominal preset current limit, and a second electric pulse to the loads during a preset second time period.

Abstract: A device is provided for use with a power supply line and an electrical unit. The power supply line has a first connecting portion, whereas the electrical unit has a second connecting portion. The first connecting portion can detachably connect with the second connecting portion. The electrical unit can perform a function when the first connecting portion is electrically connected to the second connecting portion. The electrical unit can further consume power provided from the power supply line when not performing the function. The device includes a third connecting portion, a fourth connecting portion, a switching device and a control line. The third connecting portion can detachably connect to the first connecting portion. The fourth connecting portion can detachably connect to the second connecting portion.