Rockwell Automation 8720SM High Performance AC Induction Motors - Manual (Page 14)

Publication 8720SM-IN001A-EN-P — February 2003
14 8720SM High Performance AC Induction Motors
Connecting the Blower Motor
The specific 8720SM AC blower motor will vary depending on frame
size and enclosure. The smallest motors, 8720SM-005S1BASx thru
-022S2GASx, have a 547 CFM blower while the 8720SM-030S4JASx
thru -093S6TASx motors have a 1117 CFM blower. In addition:
•
The blower motors should have a fuse in each phase. The 8720SM
blower motor should use a 1 amp, time delay current limiting fuse.
A Bussmann
® fuse (LP-CC-1) is recommended.
•
Use #16 to #18 AWG 600V hook-up wire, Alpha 3075 or 3077 or
equal.
Refer to the connection diagram supplied with each blower motor for
connection information. Figure 4 provides an example of the high, or
star, voltage 460V ac connection.
Figure 4
Blower Motor Connections
To connect the blower motor:
1. Connect for the appropriate voltage based on the type of blower
installed.
2. Check that the direction of air flow is in agreement with the
direction of air flow arrows mounted on the motor. If directional
air flow is incorrect, interchange power leads L1 and L2, or U1,
and V1.
IMPORTANT
The motor warranty conditions are violated if
you connect the blower for low voltage and
apply more than 240V ac.
U1
L1 L2 L3
W2
V1
U2
W1
V2
U1
L1 L2 L3
W2
V1
U2
(Delta, 230 VAC) (Star, 460 VAC)
Low Volts High Volts
W1
V2
U1 = Black
U2 = Green
V1 = Blue V2 = White
W1 = Brown
W2 = Yellow
EBM Blower Connections