Three Phase Industrial Motor Control

Combination motor starters, pushbutton control, and applied code

What you'll learn

Students will be able to identify all the major components of a three phase motor controller.

Students will be able to design three phase motor control circuits building from the simple start-stop station.

Students will be able to wire a three phase motor starter from scratch.

Students will be able to identify all of the National Electrical Code applications to all components of three phase motor controller.

Requirements

Students should have a strong understanding of AC/DC circuit fundamentals and students should have a strong understanding of relay logic.

Description

This course is designed for electricians who would like to extend their knowledge from residential and commercial electricity to industrial motor control of three phase motors. The course covers enclosures, NEMA specifications, short-circuit protection, fuses, disconnects, coils, overload protection, line and load connections, motor control schematics and wiring diagrams, and grounding. It goes in-depth into article 430 of the National Electrical Code to include motor feeder and over current protection, motor feeder conductors, motor controller disconnecting means, motor branch circuit short circuit and ground fault protection, motor control circuits, motor controllers, motor overload protection, motor branch circuit conductors, motor thermal protection, and grounding. It help students understand when to use name plate data and when to use tables in the codebook. It also covers the tables in section 430-247, full load current in amperes in DC, single-phase AC, and three-phase motors. This course compliments the existing courses offered by this author to ensure a well-rounded background for industrial maintenance and electro-mechanical technicians including AC/DC Electricity, Relay Logic, AC Motors, Programmable Logical Controllers, Human Machine Interface, and AC Frequency Drives.  All of these courses are available on Udemy and will offer a comprehensive background leading to an entry level position electrical manufacturing and maintenance.

Overview

Section 1: Introduction

Lecture 1 Introduction: Welcome to the course

Section 2: The Enclosure

Lecture 2 NEMA Enclosures

Section 3: Article 430 NEC

Lecture 3 Article 430 NEC

Section 4: Disconnecting Means

Lecture 4 Disconnecting Means

Section 5: Equipment Check

Lecture 5 Equipment Check

Section 6: Live Electrical Equipment Check

Lecture 6 Live Electrical Equipment Check

Section 7: Conductor color and wire sizing

Lecture 7 Conductor Color and Sizing

Section 8: Overload, short Circuit, and Ground Fault Protection

Lecture 8 Overload, short Circuit, and Ground Fault Protection

Section 9: Thermal Overloads

Lecture 9 Thermal Overload Protection

Section 10: Controller Pre-Wiring

Lecture 10 Controller Pre-Wiring

Section 11: Wiring for Three Wire Control

Lecture 11 Wiring for Three Wire Control

Section 12: Adding a Start Button

Lecture 12 Adding a Start Button

Section 13: Smaller Contactors

Lecture 13 Smaller Contactors

Section 14: Wiring the Smaller Contactor

Lecture 14 Wiring the Smaller Contactor

Section 15: Adding a 120 volt load and another push button

Lecture 15 Adding a 120 volt load and another pushbutton

Section 16: Mechanical Interlock

Lecture 16 Mechanical Interlock

Section 17: Electrical Interlock

Lecture 17 Electrical Interlock

Section 18: Electrical Interlock 2

Lecture 18 Electrical Interlock 2

This course is designed for those either already working in the electrical field or working toward advanced study in fundamentals of three phase motor control. This is for students who have a residential or commercial electrical background and would like to move into the industrial motor control segment of the electrical industry.