Application guidelines
31
FRCC.PC.014.A4.22
The compressor terminal box IP rating according to CEI529 is IP54 when correctly sized IP54 rated
cable glands are used.
Motor protection is provided by the frequency
converter. All parameters are factory preset in or-
der to guaranty locked rotor or overload current
protection.
When a warning situation is reached in the cur-
rent control, the CDS302 frequency converter will
automatically reduce the compressor speed in
order to keep the motor current of the compres-
sor below the maximum allowed.
The maximum allowable voltage imbalance
between each phases is 3%. Voltage imbalance
causes high amperage over one or several
phases, which in turn leads to overheating and
possible drive damage.
Mains imbalance function in CDS302 frequency
converter can be set to “[0] Trip” or “[1] Warning”
in 14.12 parameter. It is, by default, factory preset
to “[1] Warning”.
IP rating
Motor protection
Voltage imbalance
The normal ambient temperature supported
by the frequency converter covers a range from
-10°C to +50°C without any issue or derating.
Anyhow, the frequency converter will operate
normally down to -20°C where only the screen
of the LCP (if installed) will show display issues
without being damaged.
For ambient temperatures above +50°C, it is
mandatory to integrate a derating output factor
for the maximum compressor electrical motor
power/current. The derating values are shown in
the drive application manual and are linked to
the drive frame and IP protection level.
For altitudes below 1000 m, the frequency con-
verter will be able to deliver 100% output power
under full load for above ambient temperature.
However, for altitudes above 1000 m derating
must be applied with following values.
Ambient temperature and
altitude
Frequency converter
efficiency
Altitude
Derating factor
1000 m
1
1500 m
0.95
2000 m
0.90
2500 m
0.86
3000 m
0.82
3500 m
0.78
Drive supply voltage
Drive power
kW
Compressor
voltage
code
Compressor
model
IP20 / IP55
Drive enclosure
Estimated power
loss at max load
(W)
Efficiency
T2: 200-240/3/50-60
15
J
VSH088
B4 /C1
624
0.96
18.5
VSH117
C3 /C1
740
0.97
22
VSH170
C3 /C1
874
0.97
T4: 380-480/3/50-60
15
G
VSH088
B3 / B1
379
0.98
18.5
VSH117
B4 / B2
444
0.98
22
VSH170
B4 / B2
547
0.98
T6: 525-600/3/50-60
15
H
VSH088
B3 / B1
285
0.98
18.5
VSH117
B4 / B2
329
0.98
22
VSH170
B4 / B2
700
0.98
Electrical data, connections and wiring
For more details about these specific running conditions, please contact Danfoss technical support.
