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 4.26 Unit Size 4X Derating vs. Pressure Change
Drive air flow: 450 cfm (765 m
3
/h)
Illustration 4.27 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 4.28 Unit Size 5X Derating vs. Pressure Change (Large
Fan)
Drive air flow: 850 cfm (1445 m
3
/h)
Illustration 4.29 Unit Size 61, 62, 63 and 64 Derating vs. Pressure
Change
Drive air flow: 580 cfm (985 m
3
/h)
4.3.7 Installation on the Wall - IP21 (NEMA
1) and IP54 (NEMA 12) Units
This only applies to 41 and 42 Unit Sizes (460V, 125 - 300
HP, 575/600V, 125 - 400 HP). It must be considered where
to install the unit.
Take the relevant points into consideration before you
select the final installation site:
•
Free space for cooling
•
Access to open the door
•
Cable entry from the bottom
Mark the mounting holes carefully using the mounting
template on the wall and drill the holes as indicated.
Ensure proper distance to the floor and the ceiling for
cooling. A minimum of 225 mm (8.9 inch) below the
frequency converter is needed. Mount the bolts at the
bottom and lift the frequency converter up on the bolts.
Tilt the frequency converter against the wall and mount
the upper bolts. Tighten all four bolts to secure the
frequency converter against the wall.
Illustration 4.30 Lifting method for mounting drive on wall
Mechanical Installation
AF-600 FP High Power Operating Instructions
62
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4
Содержание AF-600 FP Series
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