Example 2, IEC:
How to calculate the required drive
If your application requires continuous 585 A of motor current (
I
2
) at 4 kHz switching
frequency, the supply voltage is 400 V and the drive is situated at 1500 m altitude and at
35 °C surrounding air temperature, calculate the appropriate IP00 drive size requirement
as follows:
1.
Switching frequency derating (page 139)
:
The minimum size required is
I
2
= 585 A / 0.78 = 750 A, where 0.78 is the derating for
4 kHz switching frequency.
2.
The derating factor for 1500 m is 1 - 1/10 000 m · (1500 - 1000) m = 0.95. Because the
surrounding air temperature is below 40 °, the altitude derating can be reduced from
0.95 to 1 -> no derating is necessary for 1500 m altitude.
3.
Surrounding air temperature derating (page 138)
:
No derating is necessary for 35 °C surrounding air temperature.
From the table in section
, drive type ACH580-04-820A-4 exceeds
the
I
2
requirement of 750 A.
■
Surrounding air temperature derating
In the temperature range +40…55 °C, the rated output current is derated by 1% for every
added 1 °C as follows. Calculate the output current by multiplying the current given in the
rating table by the derating factor.
T
1.00
0.90
+40 °C
+104 °F
+50 °C
+122 °F
k
+55 °C
+131 °F
0.80
-15 °C
+5°F
…
0.85
0.95
138 Technical data
Summary of Contents for ACH580-04
Page 1: ... ABB DRIVES FOR HVAC ACH580 04 drive modules Hardware manual ...
Page 2: ......
Page 4: ......
Page 54: ...54 ...
Page 88: ...88 ...
Page 100: ...100 ...
Page 118: ...118 ...
Page 122: ...122 ...
Page 124: ...124 ...
Page 128: ...3 6 5 5 128 Maintenance ...
Page 134: ...134 ...
Page 156: ...R10 standard configuration 156 Dimension drawings ...
Page 157: ...R10 with E208 0H354 H356 H370 0H371 Dimension drawings 157 ...
Page 158: ...R10 with option B051 158 Dimension drawings ...
Page 159: ...R10 with option E208 H356 P906 192 Tools R10 3 1 Dimension drawings 159 ...
Page 160: ...R10 with option E208 0H371 H356 0H354 H370 P906 Tools 191 R10 2 1 160 Dimension drawings ...
Page 161: ...R10 with option B051 P906 190 Tools R10 1 1 Dimension drawings 161 ...
Page 162: ...R11 standard configuration 162 Dimension drawings ...
Page 163: ...R11 with option E208 0H371 H356 0H354 H370 Dimension drawings 163 ...
Page 164: ...R11 with option B051 164 Dimension drawings ...
Page 165: ...R11 with option E208 H356 P906 Dimension drawings 165 ...
Page 166: ...R11 with option E208 0H371 H356 0H354 H370 P906 166 Dimension drawings ...
Page 167: ...R11 with option B051 P906 Dimension drawings 167 ...
Page 186: ... Declaration of conformity 186 The Safe torque off function ...
Page 206: ...Dimension drawing 206 External control unit option P906 ...
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