General Recommendations for
SAER SUBMERSIBLE
INVERTER DUTY MOTORS
Carry Manufacturing, Inc.
1360 Prospect Ave.
Caro, MI 48723
SAER MS SERIES
WATER-FILLED SUBMERSIBLE MOTORS
START
•
Starting ramp should last approximately 4
-
6 seconds (from start to reaching the
minimum operating frequency of 30Hz
•
A starting ramp that is too short can cause a water hammer on the plant.
•
A starting ramp that is too long can cause damage to the motor.
FREQUENCY VARIATION LIMITS PER MINUTE
•
Max number of frequency variations in a minute = 6
STOP
Stopping can be achieved in two ways:
•
Taking away the power source so that the motor stops by inertia. The intertia meth-
od safeguards the motor but can cause the appearance of water hammers.
•
Setting a stopping ramp to slowly stop the motor
OPERATING FREQUENCY LIMITS
•
Maximum working frequency should never exceed the nominal frequency of the
motor.
•
Minimum frequency should be calculated to ensure motor cooling and should never
be lower than 30Hz.
•
Operating at less than 30Hz can cause serious damage to thrust bearings, bushings,
and motor windings.
SERVICE FACTOR
•
Variations in power supply voltage must be +/
-
5% of the nominal value
•
Service factor = 1.15 for 60Hz motors.
INSTALLATION
•
Vertical installation only is highly recommended.
•
Motor must be completely submersed in water that is completely free
-
flowing to
ensure adequate cooling of internal components.
www.carrypumps.com
·
(800) 492-2779
·
