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 6.24: Unit Size 4X Derating vs. Pressure Change
Drive air flow: 450 cfm (765 m
3
/h)
Illustration 6.25: Unit Size 5X Derating vs. Pressure Change (Small Fan), 350 HP @ 460V and 500-550 HP @ 690 V
Drive air flow: 650 cfm (1105 m
3
/h)
Illustration 6.26: Unit Size 5X Derating vs. Pressure Change (Large Fan)
Drive air flow: 850 cfm (1445 m
3
/h)
Illustration 6.27: Unit Size 61, 62, 63 and 64 Derating vs. Pressure Change
Drive air flow: 580 cfm (985 m
3
/h)
AF-650 GP Design Guide
112
6
Summary of Contents for AF-650 GP Series
Page 5: ...AF 650 GP Design Guide 4 1...
Page 53: ...AF 650 GP Design Guide 52 4...
Page 97: ...Please note airflow directions 6 1 5 Mechanical Dimensions AF 650 GP Design Guide 96 6...
Page 98: ...Please note airflow directions AF 650 GP Design Guide 97 6...
Page 99: ...Please note airflow directions AF 650 GP Design Guide 98 6...
Page 100: ...Please note airflow directions AF 650 GP Design Guide 99 6...
Page 173: ...Max cable length 150 m AF 650 GP Design Guide 172 9...
Page 179: ...AF 650 GP Design Guide 178 9...