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| Keywords: NH-Sicherungen Hauptverteilung.jpg de NH-Sicherungen in einer Hauptverteilung en Knife fuses 50A with gG characteristic Also you can see here widespread mistakes 1 Load switch is not seen here person who will replace those fuses might be killed by arc easily; 2 Hot busbars are not separated by ribs like fuse sockets If electrician casually drops something metal there he will have quite serious skin burns to all his life long due to too high short-circuit current For example pliers or screwdriver are not melting at all during short circuit and they can't initiate immediate operation of the fuse fuse on distribution substation will trip only in 15 seconds after short circuit so electrician will be exposed to skin damaging during 15 seconds To correct mistakes there should be installed load switch with door mechanical constraint when you turn the lock to open the door it removes the voltage at same time which allows open the door only when voltage is removed But as those standarts are missing nobody does more safe way own Nogo 2010-08-03 Knife fuses Distribution boards | ||||
