280
Operation at higher temperatures
Section 14-3
14-3 Operation at higher temperatures
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.
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
SX-D4045-EF
.
Table 43 Ambient temperature and derating 400–690 V types
Model SX-F
IP20
IP54
Max temp.
Derating: possible
Max temp.
Derating: possible
SX-D40P7-EFto SX-D4037-EF
–
–
40ºC
Yes,-2.5%/°C to max +10°C
SX-D4045-EF to SX-D4132-EF
SX-D6090-EF to SX-D6160-EF
–
–
40°C
Yes,-2.5%/°C to max +5°C
SX-
@
4160-EF to SX-
@
4800-EF
SX-
@
6200-EF to SX-
@
61K0-EF
40°C
-2.5%/°C to max +5°C
40°C
-2.5%/°C to max +5°C
Summary of Contents for SX-F
Page 2: ......
Page 14: ...6 Table of contents...
Page 20: ...12 Glossary Section 1 6...
Page 32: ...24 Cabinet mounting Section 2 3...
Page 58: ...50 Connecting options Section 5 6...
Page 72: ...64 Load Monitor and Process Protection 400 Section 7 5...
Page 74: ...66 EMC standards Section 8 1...
Page 266: ...258 System Data 900 Section 11 9...
Page 274: ...266 Maintenance Section 12 3...
Page 284: ...276 Liquid cooling Section 13 12...
