Procedure - ABB ACS355 Serie Manual De Instrucciones

Procedure

1. On IT (ungrounded) systems and corner grounded TN systems, disconnect the
internal EMC filter by removing the EMC screw. For 3-phase U-type drives (with
type code ACS355-03U-), the EMC screw is already removed at the factory and
replaced by a plastic one.
WARNING! If a drive whose EMC filter is not disconnected is installed on an IT
system [an ungrounded power system or a high resistance-grounded (over
30 ohms) power system], the system will be connected to earth potential through the
EMC filter capacitors of the drive. This may cause danger or damage the drive.
If a drive whose EMC filter is not disconnected is installed on a corner grounded TN
system, the drive will be damaged.
2. Fasten the grounding conductor (PE) of the input power cable under the
grounding clamp. Connect the phase conductors to the U1, V1 and W1 terminals.
Use a tightening torque of 0.8 N·m (7 lbf in.) for frame size R1 and 1.7 N·m
(15 lbf in.) for R3.
3. Strip the motor cable and twist the shield to form as short a pigtail as possible.
Fasten the twisted shield under the grounding clamp. Connect the phase
conductors to the U2, V2 and W2 terminals. Use a tightening torque of 0.8 N·m
(7 lbf in.) for frame size R1 and 1.7 N·m (15 lbf in.) for R3.
4. Connect the optional brake resistor to the BRK+ and BRK- terminals with a
shielded cable using the same procedure as for the motor cable in step 3.
5. Secure the cables outside the drive mechanically.
Disconnecting EMC screw,
frame size R1 and R3
1
EMC
Connecting power cables and
grounding (R1)
2 4 3
2
Connecting power cables and
grounding (R3)
2 4
3
Electrical installation
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3
3
2