Emergency-it-type red protective cover for the large lever switch. The switch can only be turned on by opening the cover and turning the lever up. The switch can be quickly turned off by slapping the cover down.
The cover is suitable for Apem 63xH and 64xH series large toggle switches with a switch arm length of 16 mm and a mounting hole Ø 12 mm. See illustration (the switch in the picture is not included).