Fitting Blanking Plugs; Connecting The Main Earthing Bar; Concluding Installation Work; High Voltage Cables - ABB ZX0 Manual For Installation And Operation

2.4.2 High voltage cables

The high voltage cables are to be installed after high voltage test-
ing.
− If fitted, dismantle the optional floor plates of the cable ter-
mination compartments. Remove the cable bushings from
the floor plates.
− Lay the high voltage cables to the panels in accordance
with the project planning.
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Ensure that the phase positions of the cables are
correct!
− If fitted, slide the cable bushings onto the cables.
− Connect the cable connectors to the cables in accordance
with the manufacturer's instructions.
Checking the outer cones
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Check the outer cones for damage. If there is
damage to the outer cones, please contact our
service department.
Cleaning the outer cones
Remove any surplus or dirty grease or soiling from the outer
cones with a soft, clean, non-fraying cloth. Use intensive cleaner
M.X.T. 60 forte for cleaning if necessary.
Fitting the cable connectors
− Connect the cable connectors to the relevant outer cones
in accordance with the manufacturer's instructions.
− Connect the earthing conductors of the cable screens to
the earthing bar in the panel.
If window-type current transformers are used, route the
earthing conductors of the cable screen back through the
current transformers and connect the earthing conductor
to the earthing bar in the panel.
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The earthing conductors of the cable screens
should always be routed to the earthing bar in the
shortest possible distance.
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Observe the tightening torques for screw connec-
tions given in the cable connector manufacturer's
instructions.
− Press the cable bushings into the openings provided in the
floor plates (if fitted).
− Refit the floor plates and covers on the panels.
34 | Manual ZX0 HB 600 en - Revision 05
2.5

Fitting blanking plugs

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Close off unused voltage transformer sockets with
blanking plugs as follows:
− Treat the silicone insulating parts of the blanking plugs and
the sockets for the voltage transformers as described in
section 2.1.3.
− Insert the blanking plugs into the voltage transformer
sockets and, without tilting them, fasten them in place by
tightening the screws across the diagonal to the specified
tightening torque (section 2.1.2).
2.6 Connecting the
main earthing bar
− Connect the main earthing bar to the station earth.
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Details of the cross section and the number of con-
nections can be found in the earthing diagram (not
included in ABB's scope of supply).
− Establish the earthing connections in accordance with IEC
61936 and IEC 62271-1 from the points of view of touch
voltage, short-circuit capability and electromagnetic com-
patibility (EMC).
2.7 Concluding installation
work
− Remove all tools and other foreign bodies from the switch-
gear.
− Refit any cladding, covers, cable ducts, etc. removed dur-
ing the installation work.
Use only chlorine-free cleansers for cleaning of the
switchgear.
− Clean the external surfaces of the enclosure and low volt-
age compartments where necessary.
− Touch up any damage to paintwork with a suitable paint.
− Check that the switchgear room is in proper condition for
operation and establish that condition if necessary.