MOTOR TROUBLESHOOTING
Figure 8.2 illustrates a troubleshooting flowchart which provides logical, step-by-step methods for identifying and correcting motor problems.
Warning: The internal parts of a motor could be at line potential even when it is not rotating. Disconnect all power to the motor before performing any maintenance which could require contacting internal parts.
This is the key for Fig. 8.2 on troubleshooting ac motors.
A. Motor would not start or accelerates too slowly.
B. Motor runs noisy.
C. Motor overheats.
D. Motor bearings run hot or noisy.
Related posts:
Switch principles:Contact resistance
INDUCTION MOTORS:CONTROL OF MOTOR CHARACTERISTICS BY SQUIRREL-CAGE ROTOR DESIGN
DC Motors
Ohm’s Law:Electric circuits
TRANSFORMERS:THE IDEAL TRANSFORMER
Switches, circuit breakers and switchboards:Molded case circuit breakers
MOTOR/DRIVE SELECTION:LOAD REQUIREMENTS – TORQUE–SPEED CHARACTERISTICS
Starting Methods For Dc Motors
Electrolytic Capacitors
inductive AC Circuits:Applications of Inductive circuits
Room Acoustics:Noise Control
Cables and Cable Termination:Cables and Flexible Cords
P–N Junction Diodes:Diode characteristics
Conduit and Trunking Systems:Steel Trunking