Used together with DO1 fuses for short-circuit and overload protection of installation cables
and electrical systems.The switch is built over the DO1 safety system. For personal safety the
safety drawer can only be pulled out with the switch switched off. The mechanism ensures that
this function always takes place with full contact pressure. The switch lever prevents the
drawer from being taken out in the engaged position at the same time it prevents it from being
switched on before the drawer has been pushed completely into place. The group switch is
sealable in setting with and without fuse inserted. The switch has contact-proof bushing
terminals.