Electrical installation 47
Connecting the power cables
Connection diagram
U2 V2 W2
INPUT
1)
Drive
For alternatives, see section
Selecting the supply
disconnecting device
(disconnecting means)
on
page
OUTPUT
U1 V1 W1
Motor
3 ~
V1
U1
W1
PE
PE
L1 L2 L3
1)
Ground the other end of the PE conductor at the distribution board.
2)
Use a separate grounding cable if the conductivity of the cable shield is insufficient (smaller
than the conductivity of the phase conductor) and there is no symmetrically constructed
grounding conductor in the cable. See section
.
3)
L and N are connection markings for 1-phase supply.
Note:
Do not use an asymmetrically constructed motor cable.
If there is a symmetrically constructed grounding conductor in the motor cable in addition to
the conductive shield, connect the grounding conductor to the grounding terminal at the drive
and motor ends.
For the 1-phase supply, connect power to U1 (L) and V1 (N) terminals.
Route the motor cable, input power cable and control cables separately. For more
information, see section
on page
.
Grounding of the motor cable shield at the motor end
For minimum radio frequency interference:
•
ground the cable by twisting the shield as follows:
flattened width > 1/5 · length
•
or ground the cable shield 360 degrees at the lead-
through of the motor terminal box.
a
b
b > 1/5 · a
2)
(L) (N)
3)
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