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48
Power cable connection diagram
(PE)
* For alternatives, see
Planning the electrical
installation:
Disconnecting
device (means)
1), 2)
If shielded cable is used (not required but
recommended) and the conductivity of the shield is
< 50 % of the conductivity of the phase conductor,
use a separate PE cable (1) or a cable with a
grounding conductor (2).
Ground the other end of the input cable shield or PE
conductor at the distribution board.
3) Use a separate grounding cable if the conductivity of
the cable shield is < 50 % of the conductivity of the
phase conductor and there is no symmetrically
constructed grounding conductor in the cable (see
Planning the electrical installation /
power
cables).
Note:
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.
Do not use an asymmetrically constructed motor cable.
Connecting its fourth conductor at the motor end
increases bearing currents and causes extra wear.
Installation
INPUT
U1
V1 W1
PE
1)
2)
PE
(PE)
*
L1
L2
L3
Selecting the
Drive module
-
UDC+
UDC
-
R+
R
Optional brake
resistor
Grounding of the motor cable shield at the motor end
For minimum radio frequency interference:
• ground the cable shield 360 degrees at the lead-through of
the motor terminal box
Conductive gaskets
• or ground the cable by twisting the shield as follows:
flattened width > 1/5 · length.
a
OUTPUT
U2
V2 W2
3)
V1
W1
U1
~
3
Motor
360 degrees grounding
b > 1/5 · a
b
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