ABB ZX0 - Panels with three position switch-disconnectors

52 | Manual ZX0 HB 600 en - Revision 05
− The three switching positions of the three position switch-
disconnector, “connecting”, “disconnecting” and “earth-
ing” are clearly defined by the mechanical structure of the
switch.
− The mechanism is operated with the low voltage compart-
ment door closed (figure 4.2.1).
− The current switch position is indicated mechanically by
graphical symbols (switch-disconnector position 2, earthing
switch position 3) in the low voltage compartment door.
− The switch-disconnector function of the three position
switch-disconnector can be manually or motor-operated.
The earthing switch function of the three position switch-
disconnector is always manually operated.
− The operating mechanism can be secured with a padlock
on the selector slide (1).
− The selector slide can also be electrically interlocked as an
option.
Fig. 4.2.1: Three position switch-disconnector operating mechanism: dis-
plays and controls
1
2
4
3
5
1 Selector slide
2 Switch position indicator for disconnector
3 Switch position indicator for earthing switch
4 Opening for disconnector operation
5 Opening for earthing switch operation
Fig. 4.2.2: Lever for operation of the three position switch-disconnector
Fig. 4.2.3: Coded operating lever (right)
4.2 Panels with three
position switch-
disconnectors
&
Consult the order documents for the conditions of any
interlock.
− The lever required for operation (figure 4.2.2) can be fitted
with a coding pin (figure 4.2.3). When the coded operating
lever is used, the relevant actuating shaft must have a cor-
responding bore.
4.2.1 Notes on earthing of a feeder
panel or system section
When the feeder panel or section of the system
has been earthed, secure it to prevent cancella-
tion of earthing as follows:
Secure the selector slide with a padlock.
Affix a sign to the panel to indicate that earthing has been per-
formed.