Electrical installation
79
Connecting the power cables
Connection diagram
1) For alternatives, see section Selecting the supply disconnecting device (disconnecting means) on
page 57.
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 (2) or a cable with a grounding
conductor (3).
3) as 2)
4) 360 degrees grounding is recommended at the cabinet entry if shielded cable is used. Ground the
other end of the input cable shield or PE conductor at the distribution board.
5) 360 degrees grounding at the cabinet entry is recommended, see page 39.
6) 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 page 65).
7) External brake resistor, see page 137.
8) du/dt filter or sine filter (optional, see page 143).
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.
INPUT
OUTPUT
U1
V1 W1
2)
U2
V2 W2
UDC+
R+
UDC
-
R-
L1 L2 L3
(PE) (PE)PE
3)
Drive module
PE
1)
External brake
resistor, see
page 137.
4)
5)
U1
V1
W1
3 ~
Motor
6)
5)
8)
7)
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