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Connection of an equipotential earth bonding
may be done via a connection clamp on the
main grounding bar in cubicle F41 and S39 and
via an M8 bolt located on the main grounding
bar in cubicle F27 (see picture).
6.5.3
Mains voltage
Select external mains fuse rating according to the table in section 3
Connect 3-phase mains power to terminal X10:1, 2 and 3. The picture
shows an example from cubicle S39. The phase sequence is of no consequence. The ground wire
is connected according to the previous section.
Note that PRX3 is intended exclusively for TN earthing system network.
Unique for cubicle S39 with 440V rated DC voltage and four or more rectifier modules, is that
230V AC auxiliary power has to be supplied to terminal X10:4 and 5. It is power for the AC/DC
converter T7 used to create internal auxiliary power.
6.5.4
DC power output
Check that the rating plate of the cubical shows a rated voltage that conforms with the battery's
nominal voltage.
Connect the DC system to the terminals marked L- and
L+. Use cables that are dimensioned for handling the
rectifier's rated output current and the closest following
fuse. The picture shows an example from cubicle S39
with doubled terminals aimed for higher currents.
6.5.5
I/O unit
All the connections to the monitoring units are
grouped in a unit called the I/O unit. The connectors
are pluggable, i.e. they can be removed for better
accessibility when installing. For more information
about these connections, see
Manual for monitoring unit PCM2
.
On the I/O unit, auxiliary power is connected to X5:1(-) and X5:2(+) while measuring voltage is
connected to X7:3(-) and X7:5(+) according to the
Manual for monitoring unit PCM2
.
An exception is cubical S39 equipped with four or more rectifier modules. In that case the
auxiliary power is connected to the cubicle terminals X31:1(-) and X31:2(+) since X5 on the I/O
unit is already occupied.
