Rockwell Automation 8720SM High Performance AC Induction Motors - Manual (Page 13)

Publication 8720SM-IN001A-EN-P — February 2003
8720SM High Performance AC Induction Motors 13
Blower Motor 8720SM motors are blower cooled; incorporating an independently
powered three-phase AC blower motor that ensures continuous air
flow, regardless of the AC motor speed.
The table below lists the necessary air flow cubic feet per minute
(CFM) requirements for the motors. The cooling inlet air must not
exceed 40° C (104° F). Allow a 101.6 mm (4 in.) gap, minimum, at the
back of the motor to assure proper air flow.
If the blower motor direction of rotation is not correct the airflow will
be opposite to the arrow on the motor and it will be far lower in air
flow than what is required to cool the motor. In the standard
configuration, all 8720SM motors blow air from the blower end to the
drive end.
ATTENTION
!
The blower motor is typically wired to the AC input
of the 8720MC drive and is energized even when the
drive is not running. Before touching blower motor
components, make sure to turn off and lock out or
tag the main power supply. Failure to observe this
precaution could result in severe bodily injury or loss
of life.
Motor Blower Motor CFM @ 60 Hz
Static Pressure
(inches of water)
8720SM-005S1BASx, -005S1BBSx, -005S1BCSx, -007S1CASx,
-007S1CBSx, -007S1CCSx, -011S1DASx, -011S1DBSx, and -011S1DCSx
613450-1G
547 1.5
8720SM-015S2EASx, -015S2EBSx, -015S2ECSx, -018S2FASx, -018S2FBSx,
and -022S2GASx
547 1.5
8720SM-030S4JASx and -037S4KASx
613450-2E
1117 1.75
8720SM-045S5NASx, -055S5PASx, and -063S5QASx 1117 2.00
8720SM-075S6SASx and -093S6TASx 1117 2.25