Rockwell Automation 6012DB PowerFlex Medium Voltage Variable Frequency Drive - Manual (Page 22)

22 Rockwell Automation Publication 6000-UM001B-EN-P - October 2014
Chapter 2 Drive System Layout
Isolation Transformer Auxiliary Cooling Fans
Six fans are mounted directly underneath the isolation transformer to force air
directly through the windings - to ensure reliable cooling. A baffle structure
surrounds the periphery of the transformer structure to ensure the cooling air
does not bypass the interior of the transformer windings. These fans are powered
by a tertiary winding in the isolation transformer. Separate fan control power is
not required.
Top-mounted Main Cooling Fan(s)
The top mounted cooling fan(s) work with the auxiliary cooling fans to ensure
reliable cooling of the isolation transformer. They ensure the air is exhausted
from the cabinet by creating an induced draft.
Incoming Line Power Cable Connections
The incoming line cables connect to the line side terminals on the isolation
transformer. Incoming line cables can be brought in through the top or bottom of
the isolation transformer cabinet. Generous working space is provided, if stress
cones are required. See publication
6000-IN006_-EN-P for additional details.
Outgoing Motor Cable Connections
The outgoing motor cables connect to a cable stand-off assembly on the cabinet
side sheet (Fixed-mounted Power Module configuration) or to the cable stand-
offs mounted on the Isolation Transformer (Drawout Power Module
configuration).
The outgoing motor cables connect to output phase of the power module array.
Outgoing motor cables can be brought in through the top or bottom of the
isolation transformer cabinet. Generous working space is provided. See
publication
6000-IN006_-EN-P for additional details.