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P A N E L D E S I G N A N D E Q U I P M E N T
3.3 Panel compartments
3.3.1 Busbar compartment
The main busbars are either flat or D-shaped and
are made of copper. They are laid in sections from
panel to panel.
According to the current rating, either a single
or double configuration is used. They are held
in place by branch conductors, and if installed, by
busbar bushings. No special connection clamps
are needed. The bolt connections in the busbar
system have insulating covers. By means of
bushing plates and busbar bushings, partitions
can be created between panels. These
partitions are necessary for every panel.
3.3.2 Circuit-breaker compartment
The circuit-breaker compartment (Fig. 3, 4)
contains all the necessary equipment that
allows the withdrawable part and the panel to
work seamlessly together. Like the busbar
compartment, it is metallically partitioned on
all sides. The isolating contacts and the fixed
isolating contacts are located on a mounting
plate. The metal shutters covering the insertion
openings are also included. The shutters are
automatically opened by the actuating bars of
the withdrawable circuit-breaker part when, by
means of a lever, it is set up in the service position.
The shutters are closed when the withdrawable
—
Figure 3-1 Circuit-breaker compartment, open.
Withdrawal part in the disconnected
position
10.1
Control wiring socket
12.1
Top shutter
12.2
Lower shutter
14
Earthing switch operating mechanism
part is moved to the test/disconnected position.
When the withdrawable part is in the test/
disconnected position inside the panel,
partitioning by separation is established in the
main current circuit. Connection of the control
wiring, required for test purposes, is not
interrupted when in the test/disconnected
position. The socket for the control wiring is
mounted inside the circuit-breaker compartment.
In the test/disconnected position, the ON/OFF
pushbutton located on the circuit-breaker, and
the mechanical indicators for ON/OFF and
CHARGED/DISCHARGED can be observed through
an inspection window. All switching operations
are carried out with the doors closed. Installation
of an additional mechanical switching device to
manually operate the circuit-breaker in the service
position is also possible.
—
Figure 4 View into the circuit-breaker compartment
14.1
Drive shaft
42
Right travel rail
43.3
Duct cover, top right
9
10.1
12.1
43.3
12.2
42
14
14.1
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