Siemens LOHER CHEMSTAR 1PS2, Operating Instructions And Installation

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6.2.4 Terminal designation
According to IEC / EN 60034‑8, the following basic definitions apply to the terminal
designations for 3-phase machines:
Table 6-2 Terminal designations using the 1U1-1 as an example
1 U 1 - 1 Designation
x
Index for pole assignment for pole-changing machines where applicable. A lower
index signifies a lower speed. Special case for split winding.
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 designations
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.
6.2.5 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 are connecting power supply cords with a phase sequence of L1, L2, L3 at U, V, W,
the resulting rotation will be clockwise.
● If you transpose two connections, e.g. L1, L2, L3 at V, U, W, the resulting rotation will be
counter-clockwise.
Machines which must run only in one specific direction of rotation are marked with a direction
of rotation arrow.
6.2.6 Terminal box
Undrilled entry plate
The number and size of the cable entry tapped holes can be found in the machine dimension
drawing.
Electrical connection
6.2 Connecting
LOHER CHEMSTAR 1PS2
Operating Instructions 08/2016
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