Connecting the grounding conductor
● Ensure that the connecting surface is bare and is protected against corrosion using a
suitable substance, e.g. acid-free Vaseline.
● Locate the flat and spring washers under the bolt head.
● Check that the maximum permissible clamping thickness of 10 mm for the cable lug or strap
is not exceeded.
● Fasten the clamping screw according to the following table.
Bolt Screw-in depth: Tightening torque
M10 x 30 20 mm 52 Nm
● Use the connecting terminals designated for the grounding conductor in the terminal box.
6.3.5 Connecting the machine for a specific direction of rotation
If the machine has one shaft extension or two shaft extensions with different diameters, the
direction of rotation when looking at the front of the single or the thicker shaft extension is
defined as follows:
● If you connect the power cables in the phase sequence L1, L2, L3 to U, V, W, the resulting
rotation will be clockwise.
● If you interchange two connections, e.g. L1, L2, L3 to W, V, U, the resulting rotation will be
counter-clockwise.
● On machines which are only allowed to run in one direction, the rating plate shows an arrow
which indicates the permitted direction of rotation, and it also specifies the terminal
connections in the required phase sequence.
NOTICE
Incorrect direction of rotation
The machine will not be adequately cooled if it is operated other than how it was originally
ordered or with the incorrect direction of rotation. This can result in machine damage.
Observe the direction of rotation data on the nameplate.
6.4 Introducing and routing the cables
6.4.1 Inserting the cable into the terminal box
The connection cables are inserted into the terminal box via an exchangeable cable entry
plate. The cable entry plate is not drilled by default. This enables you to adapt the number and
size of the boreholes to the rated conditions.
Electrical connection
6.4 Introducing and routing the cables
SIMOTICS TN Series N-compact 1LH8
Operating Instructions 06/2017 67
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