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NIMS Industrial Technology Maintenance - Electrical Systems

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Duty Area 5: Electrical Systems

This duty area covers: adhering to electrical power and control systems safety rules; interpreting electrical control and power schematics; adjusting limit switches and electronic sensors; measuring voltage, current, and resistance in an electrical circuit; selecting, installing, and testing fuses and circuit breakers; installing and testing AC and DC electric motors, electrical relay control components and circuits, and electro-fluid power components and circuits; testing and repairing a machine’s electrical ground; troubleshooting an electrical motor relay control circuit and a solenoid-operated fluid power relay control circuit; replacing electrical control wiring using terminal and solder attachments; and testing and replacing transformers.

AC/DC Electrical Circuits 1 (M50151)

This course covers basic electrical circuits and their applications, electrical measurements, electrical power, electromagnetism, capacitance, and transformers. Examples of topics include types of manual switch operators, types of circuit protection, how to use a voltmeter to measure voltage, the function of electromagnetic devices, the effect of a capacitor in an AC circuit, steps for solving a combination circuit, and calculating the output voltage of a transformer.

Electronic Sensors (M50152)

This course covers inductive, capacitive, magnetic reed, hall effect, and photoelectric sensors and their applications. Examples of topics include the operation of transistors used in electronic sensors, characteristics that affect capacitive proximity sensor operation, the operation of a magnetic reed switch, and how to design a relay circuit that senses a web of material.

Electronic Motors 1 (M50153)

This course covers DC, single phase AC, and three-phase AC induction motors, motor performance measurement, single phase AC Power, and AC motors with capacitors. Examples of topics include basic components of an electric motor, how a DC motor is wired for separately excited shunt operation, how motor torque is developed, the performance characteristics of a motor, the operation of a split-phase motor, applications for capacitors in ac circuits, and how the speed of a permanent-capacitor motor is controlled.

Electric Motor Troubleshooting 1 (M50154)

This course covers troubleshooting AC and DC motors. Examples of topics include common methods used to diagnose DC motor failures, how to use a megger to test a DC electric motor armature, common failures of DC motor field windings, how to troubleshoot a DC motor using a troubleshooting chart, common types of AC electric motor failures, and how to use a multimeter to test an AC motor’s start/run capacitor.

Electrical Motor Control Troubleshooting 1 (M50155)

This course covers manual motor starters; control transformers; basic control, reversing motor, sequence, and timer circuits; magnetic motor control; and component-level and systems-level troubleshooting. Examples of topics include: explaining why dual-voltage motors should be run on the highest available voltage; how low-voltage protection is accomplished in a manual starter; the basic components of an electrical control circuit; the operation of selector switches, float switches, and on-delay timer relays; the operation of control relays and how to test them; how to test and analyze circuit signals; and common control methods used to reverse a three-phase motor.

Electro-Fluid Power Troubleshooting 1 (M50156)

This course covers relay control, event sequencing, and time-based sequencing. Examples of topics include how to manually override a solenoid-operated directional control valve, the operation of a limit switch in an event sequencing circuit, and the function of a time-delay relay in time-driven sequencing.

Electrical System Maintenance 1 (M50157)

This course covers electrical control and electro-pneumatic control wiring, electrical panel wiring, and industrial soldering. Examples of topics include rules for drawing a ladder diagram, how to inspect and verify an electrical grounding circuit, how to connect pneumatic system control wiring, and tools used for soldering.

Industrial Safety (M50101)

This course covers safety organization, personal protective equipment, HAZCOM, confined spaces, electrical safety, fire safety, accident response, workplace ergonomics, and maintenance organization. Examples of topics include creating a culture of safety in the workplace, using head, eye, and ear protection personal protective equipment, explaining the importance of chemical container labeling, providing characteristics of a permit-required confined space, the function of an electrical lockout/tagout system, using a fire extinguisher, preventing bloodborne pathogen exposure, interpreting common safety markings, and visual management tools used in the workplace.

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