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| Manual ZX0 HB 600 en - Revision 05
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Fig. 4.3.1: Three position switch-disconnector operating mechanism (with
HRC fuse): displays and controls
− 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 4.3.1).
− 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. Operation of the
cable earthing switch is triggered automatically by opera-
tion of the earthing switch in the three position switch-
disconnector.
− Blowing of a fuse results in automatic tripping of the
switch-disconnector.
Fig. 4.3.2: Lever for operation of the three position switch-
disconnector
Fig. 4.3.3: Coded operating lever (right)
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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
6
“fuse blown” indicator
4.3 Panels with three
position
switch-
disconnectors with
HRC fuses
− 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.
&
Consult the order documents for the conditions of any
interlock.
− The lever required for operation (figure 4.3.2) can be fitted
with a coding pin (figure 4.3.3). When the coded operating
lever is used, the relevant actuating shaft must have a cor-
responding bore.
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4.3.1 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.