Terminal Designations; Direction Of Rotation; Connection With/Without Cable Lugs - Siemens SIMOTICS SD Operating Instructions Manual

6.1.2

Terminal designations

With the terminal designations according to DIN VDE 0530 Part 8 or EN / IEC 60034-8 for
three-phase machines, the following principle definitions apply:
Table 6- 1
1
x
6.1.3

Direction of rotation

The standard motors are suitable for clockwise and counter-clockwise rotation.
Connection of the power cables in the phase sequence L1, L2, L3 to U1, V1, W1 results in
clockwise rotation (looking at the DE shaft end on the drive side). If two of the connections
are interchanged, then the resulting direction of rotation is counter-clockwise (e.g. L1, L2, L3
to V1, U1, W1).
In the case of machines intended for only one direction of rotation, the defined direction of
rotation e.g. for machines with an axial fan, is marked by a direction arrow on the machine.
6.1.4

Connection with/without cable lugs

In the case of terminals with terminal clamps, distribute the conductors in such a way that the
clamping heights on both sides of the fillet are about the same. This method of connection
requires that you must bend a single conductor in a U shape or use a cable lug. The same
applies to the inner and outer terminals of the ground conductor.
When connecting up using cable lugs, select their size corresponding to the required cable
cross-section and the stud size. An inclined arrangement is only permitted provided the
required air clearances and creepage distances are carefully maintained.
Remove the insulation from the conductor ends so that the remaining insulation is almost
long enough to reach the cable lug.
Note
The direct contact between the cable lug surfaces and the contact nuts or contact screws
ensure that the connection can conduct current.
Low-voltage motors
Operating Instructions, 05/2014, 5 610 00000 02 000
Terminal designations (with the 1U1-1 as an example)
U 1 - 1 Designation
Index showing the pole assignment for pole-changing machines (where
applicable, a lower number indicates a lower speed) or, in special cases, for a
subdivided winding.
x Phase designation (U, V, W)
x Index showing the start (1) / end (2) or tapping point of the winding (if there is
more than one connection per winding)
x Additional index for cases in which it is obligatory to connect parallel power
feed cables to several terminals with otherwise identical designations
Electrical connection
6.1 Connecting the machine
41