Motor protection switch

A motor protection switch with a frame and at least one contact piece which is movable relatively to at least one resting contact piece, the movable contact piece being movable against the urge of a spring into an "on" position and back into an "off" position by way of a manually operated actuating means and through linkage means which are locked by a pawl in the "on" position in such a way that when the pawl is released, either by an overload-current trigger or by a short circuit trigger, the linkage means will take up a trip-position, and with external display means which give an external indication whenever a short circuit has occurred, comprising in combination:

• a rocking beam being urged by a spring into a middle position which corresponds to the trip-position of the linkage means, the actuating means being arranged to rock the beam seesaw-like to any side of said middle position against the force of the spring, either into the "on" position or into the "off" position, and that the beam is functionally connected with the actuating means and the linkage means, actuating means being actuable by a trip-position of the linkage means to indicate from outside in this trip-position a triggering through current overload, said actuating means being actuable together with an external display to indicate a triggering due to a short circuit, the linkage means, and if applicable the external display, can be reset for a switch-on by moving the actuating means into the "off" position against the force of a beam spring and said spring, and that the "on" position can thereafter be reset by operating the actuating means.