B.2 selecting the equipment – Rockwell Automation FlexPak 3000 DC Drive Version 4.3 User Manual
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B-2
FlexPak 3000 DC Drive Hardware Reference Version 4.3
B.2 Selecting the Equipment
In addition to the drive, you will need the following to install the drive for CE
compliance:
•
AC mains filter
•
AC mains inductor
•
Electrical cabinet with back mounting panel
B.2.1 Selecting a Mounting Panel and Electrical Cabinet
The FlexPak 3000 drive, AC mains filter, AC mains inductor, and any other electronic
or electrical equipment must be mounted in an electrical cabinet. The back mounting
panel where this equipment is mounted must have a good electrically conductive
surface, such as aluminized cold-roll steel, Galvalume, or galvanized steel. It must be
free of any insulating coatings, such as varnish or paint. This establishes a good
ground plane for the mounted equipment.
The degree of enclosure does not play a significant role in the containment of RF
emissions. The cabinet can have ventilation louvers or openings for filters and fans.
None of these openings, however, can be located within a zone 10 inches above and
below the height of the drive, as shown in figure B.1.
B.2.2 Selecting an AC Mains Filter
AC mains filters limit the conducted electromagnetic emissions to the AC power mains
from the FlexPak 3000 drives.
Tables B.1 and B.2 list the FlexPak drives, full load amps, inductance, and the
Reliance AC Mains Filter model number required for each drive. The inductance is the
minimum input inductance for 2% impedance, assuming a 5 to 6% source impedance.
B.2.3 Selecting an AC Mains Inductor
An AC mains inductor must be installed between the mains filter and the AC power
input of the FlexPak 3000 drive. The inductor is user-supplied. The inductor provides
the impedance required by the mains filter, as shown in tables B.1 and B.2. This
inductor also limits the SCR line commutation notch to less than 80% when the drive
is connected to a 5 to 6% impedance source. This meets the requirements of DIN 160
Line Notching.
If the drive is to be used in an overload condition, an inductor must be chosen that is
rated for the resulting average RMS current and that will not saturate during overload.