ABB DSRF182AK02 3BSE014078R1 S100 I/O subrack
Preparing cables for EMC platesThe orientation of the EMC plates is the same for
top and bottom cable entry: the sealing grommets
face always upwards.
1. Remove the grommets.
2. To ensure proper sealing, cut along the marking
that corresponds to the cable diameter.
3. Slide the grommet onto the cable. The grom met must fit tightly to prevent water entering
the cabinet.
4. The grommets can be discarded if cables are
entered through the cabinet floor.
5. If necessary, remove the entry plate and push
the cable through the entry holes.
6. Prepare the cables as illustrated in 6-5.
- (A) illustrates how cables with an outer
cable screen or shield are prepared for EMC
bonding with the metal enclosure of the cab inet.
- (B) illustrates how cables without an outer
screen or shield are prepared.
The picture below shows the difference between
top and bottom cable entry, when making use of
EMC plates.
6.9.3 Connecting the cables
Checking the cable insulation
• Measure the insulation of each cable before
connection and verify that the results are within
the specification of the cable manufacturer.
• Leave the cables unconnected at both ends
until the commissioning personnel has given
permission to connect them.
Connections
Connect the cables to their corresponding bus bars:
• the feeder cables to busbars U1, V1, W1,
• the motor cables to busbars U2, V2, W2,
• the screen ends of all conductors and the
shields of all cables to the FE ground busbar,
• the ground cable to the PE ground busbar,
• the equipotential bonding conductor to the PE
ground busbar.
—
6-6
Top cable entry Bottom cable entry
Power cable
entry
—
References
—
6-6 Top and bottom cable
entry with EMC plates
NOTICE
Risk of flashover!
High voltages will be present in the terminal com partment. High voltages can cause flashover
between the electric potential of different conduc tors, and the electric potential of a conductor and
earth.
Therefore, a minimum clearance of 55 mm must be
maintained between a conductor and the terminals
of any other conductor, and between a conductor
and earth.

Bolted connections
Material requirements
Use stainless steel bolts and nuts with the appropriate steel grade and property class for the connection (recommended: A2-70 [designation
according to ISO 3506]).
Nuts with bonded coating can be used as an alternative to uncoated stainless steel nuts.
Connection type
The following connection type is recommended
when a cable lug (4) is connected to a busbar:
• Spring washer (1) and flat washer (2) on each
side of the busbar (3).
Other washers can be used, provided they
maintain the required contact pressure.
• Cable lugs suitable for M12 bolts.
Lubrication
If stainless steel bolts and nuts are used, lubricate
the thread and head contact surface of the bolt
using recommended pasts, eg, Molykote D paste.
—
If a coated nut (eg, with bonded
molybdenum-disulfide [MoS2]
coating) is used, the connection
does not have to be lubricated.
Tightening torque
Tighten bolted connections with bolts of sizes M10
and greater with the recommended nominal
torque for the bolt size used.