ABB ZX0 Manual For Installation And Operation page 44

4.1.2.2.2 Operation of the three
position disconnector
Turning of the selector lever (4) causes a slide to release the open-
ing (5 or 7) for the operating lever of the disconnector or earthing
switch. The selector lever can only be turned when the circuit-
breaker is open. The selector lever can only be turned for earthing
switch operation when the disconnector is open, and for discon-
nector operation when the earthing switch is open.
− The selector lever can be blocked by a padlock.
− Mechanical switch position indication is effected by graphi-
cal symbols (6 and 8) in the low voltage compartment door.
− Two different cranks are required for operation of the earth-
ing switch and the disconnector. The operating crank for
the earthing switch is marked in red (figure 4.1.2.2.2.1).
Always perform all switching operations up to the
stop.
Operation of the disconnector
− Turn the selector lever (4) counterclockwise and hold it fast.
− Plug the operating lever onto the hexagon through the
released opening (5).
Disconnector OFF ð ON
− Turn the operating crank clockwise through approx. 24
turns until the stop is reached.
− Withdraw the operating crank.
Fig. 4.1.2.2.2.1: Cranks for operation of the three position disconnector with
manual mechanism 2
44 | Manual ZX0 HB 600 en - Revision 05
Operating crank for the earthing
function of the three position discon-
nector with red marking
Disconnector ON ð OFF
− Turn the operating crank counter-clockwise through ap-
prox. 24 turns until the stop is reached.
− Withdraw the operating crank.
Operation of the earthing switch
− Turn the selector lever (4) clockwise and hold it fast.
− Plug the operating crank onto the hexagon through the
released opening (7).
Earthing switch OFF ð ON
− Turn the operating crank clockwise through approx. 24
turns until the stop is reached.
− Withdraw the operating crank.
Earthing switch ON ð OFF
− Turn the operating crank counter-clockwise through ap-
prox. 24 turns until the stop is reached.
− Withdraw the operating crank.
Fig. 4.1.2.2.2.2: Operation of the three position disconnector (in this case
earthing switch operation) with manual mechanism 2