ELEC 251 - Industrial Electrical Controls

2 Credit (1 lecture, 1 lab) 2 Contact Hours [CSTC 100  or ELEC 110 , or (ELEC 111  and ELEC 112 )]

1. Explain necessary safety protocols using lockout, tag out procedures.
2. Identify proper safety equipment. (Fuse pullers, meter probes, Pad locks)
3. Demonstrate proper safety procedures in wiring low voltage control and power circuits.

Goal 2:  Interpret analog relay ladder logic diagrams.

1. Describe proper color codes for indicating wire usage.
2. Describe proper labeling of wiring harnesses.
3. Differentiate types of switches, normally open, normally closed, and automatic switches.
4. Demonstrate proper wiring techniques (one load per rung, etc.).

Goal 3:  Interpret wiring diagrams.

1. Construct a correctly wired circuit from a wiring diagram.
2. Distinguish between control and power circuits.
3. Demonstrate a low voltage (110v) motor control circuit.

Goal 4:  Create electrical connections between motors and controls.

1. Use switches and relays to construct a three-wire motor control circuit.
2. Design a motor control circuit to reverse a three-phase motor using a drum switch.
3. Demonstrate proper use of heaters for motor overload protection.
4. Rewire three-phase for motor for low or high voltage operation.

Goal 5:  Troubleshoot motor circuits.

1. Demonstrate proper procedure for determining blown fuses and other safety devices.
2. Interpret motor characteristics such as RPM, torque, horsepower, and electrical requirements.
3. Demonstrate proper procedure for identifying a failed motor and determining an appropriate replacement.
4. Troubleshoot and correctly wire low voltage motor control circuits.

Goal 6:  Use electrical/electronic test instruments.

1. Demonstrate the proper use of a voltmeter.
2. Demonstrate the proper use of ammeters and amp clamps.