Rockwell Automation Allen-Bradley PowerFlex 6000T, Руководство по установке

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30 Rockwell Automation Publication 6000-IN100B-EN-P - October 2020
Chapter 1 Drive Mechanical Installation
External Ducting
The PowerFlex 6000T design can accommodate ducting exhaust air outside of
the control room.
The following requirements are mandatory design requirements for systems
that will externally duct the exhaust air and draw cleansed outside air:
• External ducting including an external filtering system must not add
more than 50 Pa (0.2 in. of water) pressure drop to the PowerFlex 6000T
drive airflow system. Ensure a minimum top clearance of 1500 mm (39.4
in.) above the drive top plate.
• The control room must provide slightly more make-up air, creating a
pressurized room. This slight pressurization prevents unfiltered air
drawing into the room.
• The drive is intended to operate in conditions with no special
precautions to minimize the presence of sand or dust, but not in close
proximity to sand or dust sources. IEC 721-1 defines this as being less
than 0.2 mg/m
3
of dust.
• If outside air does not meet this condition, filter the air to EU EN779
Class F6 or ASHRAE Standard 52.2 MERV 11. These ratings address a high
percentage of the 1.0...3.0 μm particle size. Clean or change filters
regularly to ensure proper flow.
• The make-up air must be between 0...40 °C (32...104°F).
• Relative humidity must be less than 95% noncondensing.
• If the ducting length is greater than 4 m (13 ft), an axial fan must be
installed at the air outlet. The exhaust flow of the axial fan must be
greater than the total flow amount of all the centrifugal fans in this air
duct.
• The ducting can be shared by more than one cabinet.
• Do not cover any medium voltage or control power wires that enter or
exit from the top of the cabinet.
• The air duct outlet must slope downward to prevent water damage.
• Screens must be installed in the air duct outlet.
• An air inlet must be added to the drive room. The cross-sectional area of
this inlet must meet the ventilation requirements of all drives. Screens
must be installed in the air inlet.
• The air inlet and outlet must not be at the same side of the drive room.
ATTENTION: The Isolation Transformer Cabinet and the Power Module/LV
Control Cabinet must be ducted separately.