ABB IS-limiter - Earthing and Final Connections

23
• Individual parts of the floor covering must be mounted
• Cable gland must be moved down so that nuts in the
rings fit into corresponding recesses in floor coverings.
In this way, the cable passages are sealed
• Repeat above 9 steps for rear (outgoing side) cable
connections for R, Y & B phases
Note
Note: For some cases depending on the customer
requirement, cable box is also used to increase cable
termination height. The requirement for additional cable
termination height must be indicated during the enquiry
stage so that panel with proper cable box arrangement
can be delivered.
CAUTION
Use proper personal protective equipment like
hand gloves, helmets etc. while handling
switchgears & making cable connections.
External control cables:
• Insert the control cables into the left-hand side ducts
• Cut the control cables to length at the top ends of the
ducts and fasten. Insert the cores into the tripping
cabinet
• Connect the control cables to the terminal strip in
accordance with the wiring diagram
• Make the control wiring connections to the adjacent
panel using the bushings
Internal control cables:
• Tripping and instrument transformer wiring is to be laid
in accordance with a precise diagram and specific
instructions (refer wiring diagrams in the order
documentation and notes in section 3.3) to preclude
mutual interference
5.6 Earthing the switchgear
(Figure 5.4)
• Connect the main earthing bar 2 of the switchgear panel
by using the prepared links
• Make the protection conductor connection to the
foundation frame
• Connect the earthing conductor coming from the ground
electrode, preferably via a removable bolted link for
testing purposes, to the main earthing bar 2 of the
switchgear
5.7 Concluding installation work
• Check the paintwork of the switchgear for any damage
and touch up where necessary (see also section 7.4.1)
• Check bolted connections, especially all those made
during on-site assembly in the busbar and earthing
system and tighten where necessary
• Align the auxiliary switch for I
th
-limitation, if ordered and
supplied, through the pressure relief apertures after
removing the lifting lugs:
- Guide the auxiliary switch plunger into the bore in the
pressure relief plate
- Align the auxiliary switch holder horizontally
figure 5.3
• Carefully clean the switchgear
• Remove all foreign bodies/tooling etc. from the panels
• Check all interlocking solenoids are working properly at
rated supply
• Properly refit all covers etc. removed during installation
and connection
• Close off any openings remaining in the enclosure as a
result of the design, but which are no longer required