Mechanical Planning; Clearance - Danfoss VLT Refrigeration Drive FC 103 Design Manual

System Integration
For more information about EMC, see chapter 2.5.18 EMC Compliance and chapter 3.2 EMC, Harmonics, and Ground Leakage
Protection.
NOTICE
EMC INTERFERENCE
3 3
Use screened cables for motor and control wiring, and separate cables for input power, motor wiring, and control
wiring. Failure to isolate power, motor, and control cables can result in unintended behaviour or reduced performance.
Minimum 200 mm (7.9 in) clearance between power, motor, and control cables is required.

3.7 Mechanical Planning

3.7.1 Clearance

Side-by-side installation is suitable for all enclosure sizes,
except when an IP21/IP4X/TYPE 1 enclosure kit is used (see
chapter 3.8 Options and Accessories).
Horizontal clearance, IP20
IP20 A and B enclosure sizes can be arranged side-by-side
with no clearance. However, the correct mounting order is
important. Illustration 3.27 shows how to mount correctly.
NOTE
For A2 and A3, ensure a clearance between the frequency
converters of minimum 40 mm.
A2
Illustration 3.27 Correct Side-by-side Mounting with no
Clearance
62
VLT
B3 B3
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®
Refrigeration Drive FC 103
Horizontal clearance, IP21 enclosure kit
When the IP21 enclosure kit is used on enclosure sizes A2
or A3, ensure a clearance between the frequency
converters of minimum 50 mm.
Vertical clearance
For optimal cooling conditions, ensure vertical clearance
for free air passage above and below the frequency
converter. See Illustration 3.28.
Enclosure
size
A2
a [mm]
b [mm]
Illustration 3.28 Vertical Clearance
a
b
A2/A3/A4/ B2/B3/B4/
A5/B1 C1/C3
100 200
100 200
C2/C4
225
225
MG16G202