Electrical connection
6.2 Connecting the machine
1LE5, 1PC4 shaft height 315/355
64
Operating Instructions, 10/2020, A5E41454666A
•
If you interchange 2 connections, e.g. L1, L2, L3 at V, U, W or according to NEMA at
T2 T1 T3, then the machine rotates counterclockwise.
Direction of
rotation
According to IEC
According to NEMA
Line feeder cables
-
L1 L2 L3
L1 L2 L3
Terminal connec-
tion
Clockwise
rotation
U V W
T1 T2 T3
Terminal connec-
tion
Counter-
clockwise
rotation
V U W
T2 T1 T3
Direction of rotation of the motor when viewing the DE
6.2.2.3
Terminal marking
According to IEC / EN 60034-8, the following basic definitions apply to the terminal markings
for 3-phase machines:
Table 6- 1
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
It is possible to turn the top side of a machine terminal box 4 x 90 degrees (if screwed on).
6.2.2.4
Protruding connection cables
WARNING
Risk of short-circuit and voltage hazard
A short circuit can occur if connecting cables are clamped and crushed between parts of the
enclosure and the cover plate.
This can result in death, severe injury and material damage.
•
During disassembly and particularly when installing the cover plate, make sure that the
connecting cables are not clamped between enclosure parts and the cover plate.
