- Types, inspection and testing - Identify and record type, construction, characteristics and ratings. Inspect housing, mounting, grounding, connections, and alignment. Perform insulation, vibration, surge comparison, loading, and winding resistance tests on auxiliary control and protection systems.
- Basics of AC Motors [PDF] AC motors are used worldwide in many applications to transform electrical energy into mechanical energy. There are many types of AC motors, but this course focuses on three-phase AC induction motors, the most common type of motor used in industrial applications.
- Motor Efficiency, Power Factor, and Load Proper electric motor application and efficiency are important things to know when applying or replacing a motor.
- Preventing Condensation in Medium-Voltage Motors [PDF] Condensation or other accumulation of moisture can be very damaging to the windings and mechanical parts of a motor, especially a medium-voltage motor.
- Testing and Commissioning Procedure For Motors It should be noted that the scope of motor testing depends upon the motor type and size, this being indicated on the inspection forms.
- Inspection and test procedures for Rotating Machinery, Synchronous Motors and Generators Visual/Mechanical Inspections and Electrical Tests for Motors and Generators.
- How to measure insulation resistance of a motor If the motor is not put into operation immediately upon arrival, it is important to protect it against external factors like moisture, high temperature and impurities in order to avoid damage to the insulation.
- Partial Discharge Testing of Rotating Apparatus [PDF] For several decades, partial discharge (PD) testing has been a very beneficial tool for assessing the stator insulation condition of medium-voltage rotating apparatus. This article examines how PD activity occurs and why PD testing is unique as applied to generators and motors.
- Partial Discharge Analysis Ultrasonic Techniques to Evaluate Partial Discharge in Electrical Machinery [PDF] Ultrasonic testing is often used for evaluation at voltages exceeding 1,000 volts, especially in enclosed switchgear. This is especially useful in identifying tracking problems.
- Neta Tech Quiz #83: Motors [PDF] Spring 2008 NETA World
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