Rockwell Automation 1329M AC Induction Motors, 56-5000 Frame, User Manual - Manual (Page 7)

AC Induction Motors 7
3. Motors that are provided with overheat protective device that
does not open the motor circuit directly will indicate “WITH
OVERHEAT PROTECTIVE DEVICE.”
a. Motors with this type of “Overheat Protective Device” have
protector leads brought out in the motor conduit box marked
“P1” and “P2.” These leads are intended for connection in
series with the stop button of the 3-wire pilot circuit for the
magnetic starter which controls the motor. See diagram.
b. The circuit controlled by the above “Overheat Protective
Device” must be limited to a maximum of 600 volts and 360
volt-amps.
Normally Closed Protectors Normally Open Protectors
Changing Rotation
1. Keep hands and clothing away from rotating parts.
2. Determine proper rotation BEFORE coupling motor to load.
3. Check rotation by jogging or bumping. Apply power to the motor
leads for a short period of time, enough to just get motor shaft to
rotate a slight amount to observe shaft rotating direction.
4. Three phase - interchange any two (2) of the three (3) line leads.
Single phase - reconnect per the connection diagram on the
motor. Normally Open (N.O.) motor thermostats may be used in
conjunction with controls installed by an OEM.
Reduced Voltage Starting
Motors used on reduced voltage starting, should be carefully selected
based upon power supply limitations and driven load requirements.
The motor starting torque will be reduced when using reduced
voltage starting. The elapsed time on the start step should be kept as
short as possible and should not exceed 5 seconds (recommended
time is 2 seconds). Refer to manufacturer for application assistance.
Operation Before Initial Starting
Stop
to Control Voltage
Start
M
M
Hold
Coil N.C.
Protectors
P1 P2
N.O.
Protectors
P2 P1
N.O motor thermostats may
be used in conjunction with
controls installed by an
OEM.
!
ATTENTION: To guard against personal injury and/or
equipment damage, remove all power to the drive and motor
before performing installation, troubleshooting or
maintenance. Motors with automatic thermal protectors can
restart when the protector temperature drops sufficiently.
Do not use motors with automatic thermal protectors in
applications where automatic restart is undesirable.