ABB ACS355 - Connecting the Power Cables

Electrical installation 49
Connecting the power cables
 Connection diagram
U2 V2 W2
INPUT
1)
Drive
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 Selecting the power cables on page 38.
3)
For more information on Common DC, see ACS355 Common DC application guide
(3AUA0000070130 [EN]).
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.
Route the motor cable, input power cable and control cables separately. For more
information, see section Routing the cables on page 41.
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)
BRK+ BRK-
Optional brake
resistor or
Common DC
3)
For alternatives,
see section
Selecting the
supply
disconnecting
device
(disconnecting
means) on page
37.