Electrical installation
39
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 ACS350-03U-), 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 sizes R0…R2, 1.7 N·m
(15 lbf in.) for R3, and 2.5 N·m (22 lbf in.) for R4.
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 sizes R0…R2, 1.7 N·m (15 lbf in.) for R3, and 2.5 N·m
(22 lbf in.) for R4.
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.
2
2
3
3
4
EMC
EMC
Disconnecting EMC screw,
frame size R4
Disconnecting EMC screw,
frame size R0…R3
1
1
Connecting power cables and
grounding
Summary of Contents for ACS350 Series
Page 1: ...ACS350 User s Manual ACS350 Drives 0 37 22 kW 0 5 30 HP ...
Page 4: ......
Page 8: ...Safety 8 ...
Page 18: ...Table of contents 18 ...
Page 24: ...Hardware description 24 ...
Page 44: ...Installation checklist 44 ...
Page 56: ...Start up control with I O and ID Run 56 ...
Page 140: ...Program features 140 ...
Page 242: ...Actual signals and parameters 242 ...
Page 266: ...Fieldbus control with embedded fieldbus 266 ...
Page 284: ...Fault tracing 284 ...
Page 288: ...Maintenance and hardware diagnostics 288 ...
Page 309: ...Dimensions 309 Frame size R2 IP20 NEMA 1 3AFE68586658 A Frame size R2 IP20 NEMA 1 VAR EMC ...
Page 311: ...Dimensions 311 Frame size R3 IP20 NEMA 1 3AFE68579872 B Frame size R3 IP20 NEMA 1 VAR EMC ...
Page 313: ......