Motor Connection - Danfoss VLT Midi Drive FC 280 Design Manual

Product Overview

2.2.1 Motor Connection

2 2
WARNING
INDUCED VOLTAGE
Induced voltage from output motor cables that run
together can charge equipment capacitors, even when
the equipment is turned off and locked out. Failure to
run output motor cables separately or use shielded
cables could result in death or serious injury.
•
Run output motor cables separately.
•
Use shielded cables.
•
Comply with local and national electrical codes
for cable sizes. For maximum cable sizes, see
chapter 7.1 Power-dependent Specifications.
•
Follow 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 frequency
converter and the motor.
Procedure
1. Strip a section of the outer cable insulation.
Recommended length is 10–15 mm (0.4–0.6 in).
2. Position the stripped cable under the cable clamp
to establish mechanical fixation 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
Grounding in the VLT
Guide. See Illustration 2.3.
4. Connect the 3-phase motor wiring to terminals
96 (U), 97 (V), and 98 (W), as shown in
Illustration 2.3.
5. Tighten the terminals in accordance with the
information provided in chapter 7.7 Connection
Tightening Torques.
14
®
VLT Midi Drive FC 280
®
Midi Drive FC 280 Operating
Danfoss A/S © 03/2016 All rights reserved.
Illustration 2.3 Motor Connection
The mains, motor, and grounding connection for single-
phase and 3-phase frequency converters are shown in
Illustration 2.4, Illustration 2.5, and Illustration 2.6, respec-
tively. Actual configurations vary with unit types and
optional equipment.
MG07B102