ABB ACS150 Drive Derating – There are three factor of derating temperature derating, altitude derating, switching frequency derating. The load capacity decreases if the installation site ambient temperature exceeds 40 °C (104 °F) or if the altitude exceeds 1000 meters (3300 ft) or the switching frequency is changed from 4 kHz to 8, 12 or 16 kHz
- Temperature derating
- Altitude derating
- Switching frequency derating
Temperature Derating
In the temperature range +40 °C…+50 °C (+104 °F…+122 °F), the rated output current (I2N ) is decreased by 1% for every additional 1 °C (1.8 °F). The output current is calculated by multiplying the current given in the rating table by the derating factor.
Example If the ambient temperature is 50 °C (+122 °F), the derating factor is 100% – 1 · 10 °C = 90% or 0.90. The output current is then 0.90 · I2N.
Altitude derating, I2N
In altitudes 1000…2000 m (3300…6600 ft) above sea level, the derating is 1% for every 100 m (330 ft). For 3-phase 200 V drives, the maximum altitude is 3000 m (9800 ft) above sea level. In altitudes 2000…3000 m (6600…9800 ft), the derating is 2% for every 100 m (330 ft).
Switching frequency derating, I2N
The drive derates itself automatically when parameter 2607 SWITCH FREQ CTRL = 1 (ON).
ABB ACS150 Drive Switching Frequency – for switching frequency goto the parameter group 26 and then change parameter 2606.
Parameter
2606 – …… Hz ( 4 kHz, 8 kHz, 12 kHz, 16 kHz)
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ABB ACS150 Drive Derating
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