Troubleshooting - ABB M3JM Betriebsanleitung

10. Troubleshooting

These instructions do not cover all details or variations in
equipment nor provide information for every possible
condition to be met in connection with installation, opera-
tion or maintenance. Should additional information be
required, please contact the nearest ABB Sales Office.
Motor troubleshooting chart
Your motor service and any troubleshooting must be
handled by qualified persons who have the proper tools
and equipment.
TROUBLE
Motor fails to start
Motor stalls
Motor runs and then
dies down
Motor does not
accelerate up to
nominal speed
22 – ML/EN ABB Motors and Generators | 3GZF500730-47 rev E 06-2015
CAUSE
Blown fuses
Overload trips
Improper power supply
Improper line connections
Open circuit in winding or control
switch
Mechanical failure
Short circuited stator
Poor stator coil connection
Rotor defective
Motor may be overloaded
One phase may be open
Wrong application
Overload
Low voltage
Open circuit
Power failure
Not applied properly
Voltage too low at motor terminals
because of line drop
Starting load too high
Broken rotor bars or loose rotor
Open primary circuit
WHAT TO DO
Replace fuses with proper type and rating.
Check and reset overload in starter.
Check to see that power supplied agrees with motor
rating plate and load factor.
Check connections against diagram supplied with
motor.
Indicated by humming sound when switch is closed.
Check for loose wiring connections and ensure that all
control contacts are closing.
Check to see if motor and drive turn freely. Check
bearings and lubrication.
Indicated by blown fuses. Motor must be rewound.
Remove end shields and locate fault.
Look for broken bars or end rings.
Reduce load.
Check lines for open phase.
Change type or size. Consult equipment supplier.
Reduce load.
Ensure the rating plate voltage is maintained. Check
connection.
Fuses blown. Check the overload relay, stator and
push buttons.
Check for loose connections to line, fuses and control.
Consult equipment supplier for proper type.
Use higher voltage or transformer terminals or reduce
load. Check connections. Check conductors for proper
size.
Check the motor's starts against "no load".
Look for cracks near the rings. A new rotor may be
required as repairs are usually temporary.
Locate fault with testing device and repair.