External ducts
If additional duct work is added externally to the Rittal cabinet the pressure drop in the ducting must be calculated. Use the charts below to derate the
frequency converter according to the pressure drop.
Illustration 3.11: D frame Derating vs. Pressure Change
Drive air flow: 450 cfm (765 m
3
/h)
Illustration 3.12: E frame Derating vs. Pressure Change (Small Fan), P250T5 and P355T7-P400T7
Drive air flow: 650 cfm (1105 m
3
/h)
3 Mechanical Installation ADAP-KOOL
®
Drive AKD 102 High Power
24
MG.11.O1.02 - ADAP-KOOL
®
is a registered Danfoss trademark
3
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