4.5 Access
•
Remove the cover plate with a screwdriver. See
Figure 4.4.
Figure 4.4 Control Wiring Access
4.6 Motor Connection
WARNING
INDUCED VOLTAGE
Induced voltage from output motor cables that run
together can charge equipment capacitors, even when
the equipment are turned o and locked out. Failure to
run output motor cables separately or use shielded
cables or metal conduits could result in death or serious
injury.
•
Run output motor cables separately.
•
Use shielded cables or metal conduits
•
Comply with local and national electrical codes
for cable sizes. For maximum cable sizes, see
chapter 9.1 Electrical Data.
•
Follow the motor manufacturer wiring
requirements.
•
Motor wiring knockouts or access panels are
provided at the base of IP21 (NEMA1/12) units.
•
Do not wire a starting or pole-changing device
(for example, Dahlander motor or slip ring
induction motor) between the adjustable
frequency drive and the motor.
Procedure
1. Strip a section of the outer cable insulation.
2. Position the stripped cable under the cable clamp
to establish mechanical xation and electrical
contact between the cable shield and ground.
3. Connect the ground cable to the nearest
grounding terminal in accordance with the
grounding instructions provided in
chapter 4.3 Grounding. See Figure 4.5.
4. Connect the 3-phase motor wiring to terminals
96 (U), 97 (V) and 98 (W) as shown in Figure 4.5.
5. Tighten the terminals in accordance with the
information provided in chapter 9.7 Connection
Tightening Torques.
Figure 4.5 Motor Connection
The line power, motor and grounding connection for
single-phase and 3-phase adjustable frequency drives are
shown in Figure 4.6 and Figure 4.7 respectively. Actual
congurations vary with unit types and optional
equipment.
Electrical Installation
VLT
®
Midi Drive FC 280
14 Danfoss A/S © 11/2015 All rights reserved. MG07A122
44
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