ABB ACS550-02 User Manual page 26

24
Power Cable Connection Diagram
Ground the other end of the input cable shield /
PE conductor at the distribution board.
1) an alternative to the grounding of the drive and the motor through the cable shield or armour
2) used if the conductivity of the cable shield is < 50 % of the conductivity of the phase conductor.
3) For minimum radio frequency interference at the motor end:
Installation
INPUT
U1
V1 W1
PE
1)
1)
(PE) PE (PE)
*
L1 L2
Note: Connecting the fourth conductor of the motor cable at the motor end increases bearing
currents and causes extra wear.
• 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. In the
figure below, b > 1/5 · a.
b
a
OUTPUT
U2
V2 W2
V1
U1
~
3
Motor
L3
360 degrees grounding
1)
2)
W1
3)