EN-3111L
Electrical Machines Lab
Course Description
Theoretical and practical aspects of the operation and maintenance of electrical machinery, including: electric circuits and wiring, AC and DC motors and generators, transformers, motor controls, and troubleshooting.
This course consists of twelve, 2-hour long labs with practical assessments, and a final exam.
Entrance requirements
Concurrent attendance or successful completion of EN-3111.
Learning Objectives
Demonstrate proficiency in the following skills:
- OICEW‑3‑1A Plan and use test equipment
- OICEW‑3‑1B Troubleshoot electrical motor control system
- OICEW‑7‑1E Parallel generators
Topics
Alternating Current Principles.
Three Phase Transformers.
Three Phase Induction Motors.
DC Generators.
Synchronous Generators.
Generator Paralleling.
Residential Wiring;
Lock-out / Tag-out Procedures;
Use of Voltmeter, Ammeter, Wiggy, DMM.Basic Principles of Motor Control.
Basic Control Circuits.
Jogging Control Circuits.
Reduced Voltage Starters.
Time Relays;
High Voltage switchgear.
Other objectives
- Measure voltage, amperage, and resistance with a DMM
- Measure amplitude, frequency, period and phase shifts of sine waves using an oscilloscope
- Measure wattage, vars, va, and power factor using a power meter
- Lock-out and tag out electrical circuits
- Wire a three-way lighting circuit
- Connect three phase transformers in delta and wye configurations, and describe the resulting voltage and current relationships
- Demonstrate the operating characteristics of three phase induction motors
- Demonstrate the operating characteristics of single phase motors
- Demonstrate the operation of unloaded and loaded synchronous generators
- Parallel a AC Generator with the bus or another generator
- Demonstrate the operating principles of two-wire and three-wire control circuits
- Demonstrate the operating principles jogging and breaking circuits
- Demonstrate the operating principles reduced voltage and soft starters
- Wire single- and three-phase motors to UVR and UVP motor controllers
- Describe the operation and troubleshoot a magnetic motor controllers
- Describe the purpose a thermal overload relay
- Describe what is meant by sustained overload protection and interrupting capacity
- Describe safety requirements for working with high voltage equipment
- Describe configuration and operation of 5 kV circuit breaker in the laboratory