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6.2.6
Terminal designation
According to IEC / EN 60034‑8, the following basic definitions apply to the terminal
designations for 3-phase machines:
Table 6-3
1
x
6.2.7
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,
● If you transpose two connections, e.g. L1, L2, L3 at V, U, W, the resulting rotation will be
Machines which must run only in one specific direction of rotation are marked with a direction
of rotation arrow.
6.2.8
Terminal box
● The number and size of the cable entry tapped holes can be found in the machine dimension
● Only use cable entries that are suitable for the cable.
● Only use suitable cable entries and cables for the prevailing ambient temperature.
● Check the cable glands and cables to ensure that they are correctly sealed and firmly
● Correctly close and seal threads or holes that are not being used ensuring that the IP degree
Please note the following points for explosion-protected machines:
● Replace the cable glands that are not being used by appropriately certified screw plugs.
● If you are using cable glands, use only appropriately certified cable glands with strain relief.
LOHER CHEMSTAR 1PS5
Operating Instructions 03/2014
Terminal designations using the 1U1-1 as an example
U
1
-
1 Designation
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
the resulting rotation will be clockwise.
counter-clockwise.
drawing.
seated.
of protection is maintained. The IP degree of protection is specified on the rating plate.
Comply with the installation and operation conditions specified in the certificate for these
cable glands and check that they have been fully complied with.
Electrical connection
6.2 Connecting
59
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