3-4
CDA3000 Operation Manual
3 Installation
3.3 Motor
connection
Step Action Comment
1
Define the wire cross-section
dependent on the maximum current and
ambient temperature.
Wire cross-section to VDE0100,
part 523, see section 3.4
“Mains connection”.
2
Wire the motor phases U, V, W by way of
a shielded cable and ground the motor to
X1/
.
Mount shield at both ends to
reduce interference emission.
3
Wire the temperature sensor PTC (if
fitted) with separately shielded wires.
Mount shield at both ends to
reduce interference emission.
Figure 3.3 Connection of motor
Note the following points:
• Always use shielded cables to connect the motor.
• Shield contact on the inverter module:
− For inverter modules BG1 ... 5 (0.37 ... 15 kW) there is an
accessory shield (ST02, ST04 or ST05) permitting simple clip
mounting with all-round contact.
− For inverter modules BG6 ... 8 (22 ... 132 kW) we recommend
using a cable clamp rail with shield connection directly on the
cable gland in the switch cabinet.
• The motor at the inverter output may be shut off by means of a
contactor or motor circuit-breaker. The inverter module cannot be
damaged in the process. Circuit reference for „motor contactor“ see
appendix A.5.1.
• Multi-motor operation is possible; for project planning notes see
Appendix A.5.
The CDA3000 inverter
modules are protected
against shorting and
ground faults at the ter-
minals when in opera-
tion. In the event of a
short-circuit or ground
fault in the motor cable,
the power stage is dis-
abled and an error
message is delivered.
X3
X1
U
V
W
M
3~
ϑ
1
V
2
U
W
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