Control Wiring; Access - Danfoss VLT AQUA Drive FC 202 Operating Instructions Manual

Installation
•
Ground the cable in accordance with grounding
instructions provided in 2.4.2 Earth (Grounding)
Requirements
•
All frequency converters may be used with an
isolated input source as well as with ground
reference power lines. When supplied from an
isolated mains source (IT mains or floating delta)
or TT/TN-S mains with a grounded leg (grounded
delta), set 14-50 RFI Filter to OFF. When off, the
internal RFI filtercapacitors between the chassis
and the intermediate circuit are isolated to avoid
damage to the intermediate circuit and to reduce
earth capacity currents in accordance with IEC
61800-3.

2.4.5 Control Wiring

•
Isolate control wiring from high power
components in the frequency converter.
•
If the frequency converter is connected to a
thermistor, for PELV isolation, optional thermistor
control wiring must be reinforced/double
insulated. A 24 V DC supply voltage is
recommended.

2.4.5.1 Access

•
Remove access cover plate with a screw driver.
See Illustration 2.12.
•
Or remove front cover by loosening attaching
screws. See Illustration 2.13.
Illustration 2.12 Control Wiring Access for A2, A3, B3, B4, C3 and
C4 Enclosures
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®
VLT AQUA Drive
Operating Instructions
Illustration 2.13 Control Wiring Access for A4, A5, B1, B2, C1 and
C2 Enclosures
See Table 2.3 before tightening the covers.
A4/A5
B1
B2
C1
C2
* No screws to tighten
- Does not exist
Table 2.3 Tightening Torques for Covers (Nm)
®
MG20M902 - VLT is a registered Danfoss trademark
Frame IP20 IP21
- -
- *
- *
- *
- *
2
IP55 IP66
2 2
2.2 2.2
2.2 2.2
2.2 2.2
2.2 2.2
19
2