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Tightening torques for screw and bolt connections (Page 143)
6.2.1.1
Terminal designation
According to IEC / EN 60034-8, the following basic definitions apply to the terminal markings
for 3-phase machines:
Table 6- 1
1
x
6.2.1.2
Circuit diagram inside the terminal box cover
Data on the connection and connecting the machine winding can be found in the circuit
diagram in the cover of the terminal box.
6.2.1.3
Direction of rotation
The standard motors are suitable for clockwise and counter-clockwise rotation.
For defined directions of rotation (direction of rotation arrow), appropriately connect the line
power cables.
● If you connect line cables with a phase sequence of L1, L2, L3 at U, V, W, the resulting
rotation is clockwise.
● If you interchange two connections, e.g. you connect L1, L2, L3 to V, U, W, the resulting
rotation will be counter-clockwise.
Clockwise rotation
Counter-clockwise rotation
Direction of rotation of the motor when looking at DE
1MB155 / 1MB555
Operating Instructions, 03/2018, A5E41926185A
Terminal markings using the 1U1-1 as an example
U
1
-
1 Marking
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 markings
Electrical connection
6.2 Connecting the machine
According to IEC
U V W
V U W
67
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