Application guidelines
25
FRCC.PC.014.A4.22
Electrical data, connections and wiring
Wiring & EMC protection
The motor compressor power supply from the
CDS302 frequency converter to the VSH com-
pressor must be done with a braided screened /
armored cable. This cable needs to have its screen
/ armor conduit connected to earth on both ends.
Avoid terminating this cable connection with
twisting ends (pigtails) because that would result
in an antenna phenomena and decreases the
effectiveness of the cable.
Control cables to the CDS302 frequency convert-
er must use the same installation principles as the
power supply cable.
The motor compressor cable must be installed
in a conduit separate from the control and mains
cables.
Physical installation of the frequency converter
on the mounting plate must ensure good electri-
cal contact between the mounting plate and the
metal chassis of the converter. Use star-washers
and galvanically conductive installation plates
to secure good electrical connections. Refer to
instructions MG.34.M1.02 for tightening torques
and screw sizes.
Note that the CDS302 must be mounted on a
plain wall to ensure a good air flow through its
heat exchanger.
From network to frequency converter
From frequency converter to compressor
Type
inch²
AWG
Type
inch²
AWG
200 - 240 V
CDS-15kW
0.039
4
VSH088-J
0.039
4
CDS-18.5 kW
0.054
2
VSH117-J
0.054
2
CDS-22 kW
0.077
1
VSH170-J
0.077
1
380 - 400 V
CDS-15 kW
0.009
10
VSH088-G
0.009
10
CDS-18.5 Kw
0.015
8
VSH117-G
0.015
8
CDS-22 kW
0.025
6
VSH170-G
0.025
6
525 - 600 V
CDS-15 kW
0.006
12
VSH088-H
0.006
12
CDS-18.5 kW
0.009
10
VSH117-H
0.009
10
CDS-22 kW
0.015
8
VSH170-H
0.015
8
Wire sizes
Below table lists recommended wiring sizes for the motor compressor power supply cables. These
wiring sizes are valid for a cable length up to 66 ft.
