Control Cable Routing - Danfoss VLT HVAC Drive FC 102 Instruction Manual

Electrical Installation
•
Try to ensure that the AC line voltage is balanced
to ground. Balancing to ground can be difficult
for IT, TT, TN-CS or grounded leg systems.
•
Use an insulated bearing as recommended by the
motor manufacturer.
NOTICE!
Motors from reputable manufacturers typically have
insulated bearings fitted as standard in motors of this
size.
If none of these strategies work, consult the factory.
If necessary, after consulting Danfoss:
•
Lower the IGBT switching frequency.
•
Modify the inverter waveform, 60 °AVM vs.
SFAVM.
•
Install a shaft grounding system or use an
isolating coupling between motor and load.
•
Use minimum speed settings if possible.
•
Use a dU/dt or sinus filter.

4.1.17 Control Cable Routing

Tie down all control wires to the designated control cable
routing as shown in Figure 4.21. To ensure optimum
electrical immunity, connect the shields properly.
Serial communication bus connection
Connections are made to the relevant options on the
control card. For details, see the relevant serial communi-
cation bus instructions. Place the cable in the provided
path inside the adjustable frequency drive and tie it down
with other control wires (see Figure 4.12 and Figure 4.13).
MG11F522
Instruction Manual
Figure 4.12 Control Card Wiring Path for E1 and E2
Figure 4.13 Control Card Wiring Path for F1/F3. Control Card
Wiring for the F2/F4 Use the Same Path
In the Chassis (IP00) and NEMA 1 units, it is also possible
to connect the serial communication bus from the top of
the unit as shown in Figure 4.14 to Figure 4.16. On the
NEMA 1 unit a cover plate must be removed.
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