Siemens SIMOTICS XP 1MB5 SH400, Operating Instructions Manual, Page: 73 / 166

6.5.2 Terminal marking
According to IEC / EN 60034‑8, the following basic definitions apply to the terminal markings for
3-phase machines:
Table 6-2 Terminal markings using the 1U1-1 as an example
1 U 1 - 1 Marking
x
Code for split winding, where applicable. Special case for pole assignment for pole-
changing machines.
A lower index signifies a lower speed.
x Phase designation U, V, W
x Index for winding start (1) or end (2) or if there is more than one connection per
winding
x Additional indices for cases in which it is obligatory to connect parallel power feed
cables to several terminals with otherwise identical markings
6.5.3 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 line cables with phase sequence L1, L2, L3 to U, V, W or according to
NEMA at T
1
T
2
T
3
, then a clockwise phase sequence is obtained.
● If you interchange two connections, e.g. L1, L2, L3 at V, U, W or according to NEMA at
T
2
T
1
T
3
, then a counterclockwise phase sequence is obtained.
● 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.
Check the appropriate data before connecting the line feeder cables.
NOTICE
Machine damage due to 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.
6.5.4 Connecting protruding cables
In the case of connection cables brought out of the machine, no terminal board is installed on
the terminal base of the machine housing. The connection cables are directly connected to
stator winding terminals at the factory.
Electrical connection
6.5 Connecting the machine
1MB5 SH 400/450
Operating Instructions, 05/2019, A5E45959221A
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