Operation At Higher Temperatures - Omron SX-F Instruction Manual

Operation at higher temperatures

14-3 Operation at higher temperatures
Table 43 Ambient temperature and derating 400–690 V types
Model SX-F
SX-D40P7-EFto SX-D4037-EF
SX-D4045-EF to SX-D4132-EF
SX-D6090-EF to SX-D6160-EF
@ @
SX- 4160-EF to SX- 4800-EF
@ @
SX- 6200-EF to SX- 61K0-EF
280
OMRON variable speed drives are made for operation at maximum of 40°C
ambient temperature. However, for most models, it is possible to use the VSD
at higher temperatures with little loss in performance. Table 43 shows ambient
temperatures as well as derating for higher temperatures.
IP20
Max temp. Derating: possible
– –
– –
40°C -2.5%/°C to max +5°C
Example
In this example we have a motor with the following data that we want to run at
the ambient temperature of 45°C:
Voltage 400 V
Current 165 A
Power 90 kW
Select variable speed drive
The ambient temperature is 5 °C higher than the maximum ambient tempera-
ture. The following calculation is made to select the correct VSD model.
Derating is possible with loss in performance of 2.5%/°C.
Derating will be: 5 X 2.5% = 12.5%
Calculation for model
SX-D4037-EF
74 A - (12.5% X 74) = 64.8 A; this is not enough.
Calculation for model
SX-D4110-EF
90 A - (12.5% X 90) = 78.8 A
In this example we select the
Max temp.
40ºC Yes,-2.5%/°C to max +10°C
40°C Yes,-2.5%/°C to max +5°C
40°C -2.5%/°C to max +5°C
.
SX-D4045-EF
Section 14-3
IP54
Derating: possible