| AEETP | 25011 | Electric
Motors- Three-Phase |
Trainee Name___________________________
Trainee Social Security Number:
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Trainee Status:
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Course Name: ___________________
Course Code: ___________________
National Center Course Number:
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Date Course Completed:
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Performance Criteria Completed: _____________
Performance Objectives:
Pass Fail
1.1
Construct a graph representing the relationship between the
three phases of three-phase alternating current.
1.2
Describe the basic parts and operation of common types of
three-phase AC motors.
1.3
Describe how slip occurs during the operation of a
three-phase AC motor.
1.4
Use an electrical diagram to explain how speed control can
be accomplished in a three-phase AC motor.
Topic 2: Inspection and Testing
2.1 Inspect an operating three-phase AC motor for proper
operation.
2.2 Use a clamp-on ammeter to test an operating motor for
a balance
between phases.
2.3 Inspect a non-operating three-phase AC motor for signs
of
trouble.
2.4 Use a clamp-on ammeter to test a motor’s heater.
2.5 Use a feeler gauge to make sure that the rotor of a non-
operating
motor is centered in the motor’s stator.
2.6 Use a megohmmeter to conduct an insulation test on a
three-phase
AC motor.
2.7 Use a megohmmeter to test the stator of a wye-connected
three-phase
AC motor for grounds.
2.8 Use a multimeter to test the stators of both wye-connected
and
delta-connected stators for opens.
2.9 Use a multimeter to test a three-phase AC motor stator
for
shorts.
2.10 Use a megohmmeter to test a wound rotor for grounds.
2.11 Use a multimeter to test a wound rotor for opens.
2.12 Use a growler to test a rotor for shorts.
2.13 Inspect a squirrel-cage rotor for signs of opens.
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Performance Evaluator’s Name (Print)
___________________________
Date Completed: _____________________________________________