GE Industrial Solutions AF-600 FP Fan and Pump Drive (460V_575V 150HP and above) User Manual
Page 67
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 5.32: Unit Size 4X Derating vs. Pressure Change
Drive air flow: 450 cfm (765 m3/h)
Illustration 5.33: Unit Size 5X Derating vs. Pressure Change (Small Fan)
Drive air flow: 650 cfm (1105 m3/h)
Illustration 5.34: Unit Size 5X Derating vs. Pressure Change (Large Fan)
Drive air flow: 850 cfm (1445 m3/h)
AF-600 FP High Power Operating Instructions
66
5
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