Access; Motor Connection - Danfoss VLT Refrigeration Drive FC 103 Operating Instructions Manual

Electrical Installation

4.5 Access

•
Remove cover with a screw driver (See
Illustration 4.3) or by loosening attaching screws
(See Illustration 4.4).
Illustration 4.3 Access to Wiring for IP20 and IP21 Enclosures
Illustration 4.4 Access to Wiring for IP55 and IP66 Enclosures
See Table 4.1 before tightening the covers.
Enclosure
A4/A5
B1/B2
C1/C2
No screws to tighten for A2/A3/B3/B4/C3/C4.
Table 4.1 Tightening Torques for Covers [Nm]
MG16E302
Operating Instructions
IP55 IP66
2 2
2.2 2.2
2.2 2.2
Danfoss A/S © Rev. 2014-02-06 All rights reserved.

4.6 Motor Connection

WARNING
INDUCED VOLTAGE
Induced voltage from output motor cables that run
together can charge equipment capacitors even with the
equipment turned off and locked out. Failure to run
output motor cables separately or use screened cables
could result in death or serious injury.
•
run output motor cables separately, or
•
use screened cables
•
Comply with local and national electrical codes
for cable sizes. For maximum wire sizes see
chapter 8.1 Electrical Data.
•
Follow motor manufacturer wiring requirements.
•
Motor wiring knockouts or access panels are
provided at the base of IP21 (NEMA1/12) and
higher units.
•
Do not wire a starting or pole-changing device
(e.g. Dahlander motor or slip ring induction
motor) between the frequency converter and the
motor.
Procedure
1. Strip a section of the outer cable insulation.
2. Position the stripped wire under the cable clamp
to establish mechanical fixation and electrical
contact between cable screen and ground.
3. Connect ground wire to the nearest grounding
terminal in accordance with grounding
instructions provided in chapter 4.3 Grounding,
see Illustration 4.5.
4. Connect the 3-phase motor wiring to terminals
96 (U), 97 (V), and 98 (W), see Illustration 4.5.
5. Tighten terminals in accordance with the
information provided in chapter 8.7 Connection
Tightening Torques.
4 4
15