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CG Drives & Automation 01-5326-01r3b
TTechnical Data
221
14.3 Operation at higher temperatures
Most
AC drives are made for operation at
maximum of 40°C (104 °F) ambient temperature. However,
it is possible to use the AC drive at higher temperatures with
reduced output rating.
Possible derating
Derating of output current is possible with
-1% / degree Celsius to max +15 °C (= max temp 55 °C) or
-0.55%/ degree Fahrenheit to max +27 °F
(= max temp. 131 °F).
Example
In this example we have a motor with the following data that
we want to run at the ambient temperature of
45 °C (113 °F):
Voltage
400 V
Current
72 A
Power
37 kW (50 hp)
Select AC drive
The ambient temperature is 5 °C (9 °F) higher than the
maximum ambient temperature. The following calculation
is made to select the correct AC drive model.
Derating is possible with loss in performance of
1%/°C (0.55%/ degree F).
Derating will be: 5 x 1% = 5%
Calculation for model V
4*84""
74 A - (5% x 74) = 70.3 A; this is not enough.
Calculation for model V
4*84"
90
90 A - (5% x 90) = 85.5 A
In this example we select the V
4*84""
9(0R'ULYH 96, 9(0 U
VSI2.0
Содержание VEMoDRIVE VSI 2.0 HD
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Страница 40: ...38 Installation CG Drives Automation 01 5326 01r3b 9 0R ULYH 96 9 0 U...
Страница 52: ...50 Getting Started CG Drives Automation 01 5326 01r3b 9 0R ULYH 96 9 0 U...
Страница 64: ...62 EMC and standards CG Drives Automation 01 5326 01r3b 9 0R ULYH 96 9 0 U...
Страница 142: ...140 Functional Description CG Drives Automation 01 5326 01r3b 9 0R ULYH 96 9 0 U...
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Страница 206: ...204 Troubleshooting Diagnoses and Maintenance CG Drives Automation 01 5326 01r3b 9 0R ULYH 96 9 0 U...
Страница 232: ...230 Technical Data CG Drives Automation 01 5326 01r3b 9 0R ULYH 96 9 0 U...
Страница 238: ...236 Menu List CG Drives Automation 01 5326 01r3b 9 0R ULYH 96 9 0 U...
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