Electrical installation 51
Connecting the power cables
Connection diagram
U2 V2 W2
INPUT
1)
Drive
OUTPUT
U1/L V1/N W1
Motor
3 ~
V1
U1
W1
PE
PE
L1/L L2/N 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
on page
3)
For more information on Common DC, see
ACS355 Common DC application guide
(3AUA0000070130 [EN]).
4)
In one-phase installations, connect the neutral cable here.
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
.
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
.
4)
Summary of Contents for ACS355 series
Page 1: ...ABB machinery drives User s manual ACS355 drives ...
Page 4: ......
Page 16: ...16 ...
Page 32: ...32 Operation principle and hardware description ...
Page 58: ...58 Electrical installation ...
Page 74: ...74 Start up control with I O and ID run ...
Page 106: ...106 Control panels ...
Page 120: ...120 Application macros ...
Page 178: ...178 Program features ...
Page 338: ...338 Fieldbus control with embedded fieldbus ...
Page 368: ...368 Fault tracing ...
Page 404: ...404 Dimension drawings ...
Page 410: ...410 Appendix Resistor braking ...
Page 434: ...434 Appendix Permanent magnet synchronous motors PMSMs ...