Motor Starter Wiring Infographic
Complete wiring guide for 3-phase motor starters with and without overload (OL) relays.
Technical Article
February 06, 2024
by David Peterson
Starting motors involves a tremendous current, and certain devices are in place to start and protect the motor control circuit.
Figure 1. Various methods of starting and driving 3-phase motors with direct online (DOL) starters. Click on the image to see a high-res (printable 11x17 size) version.
Are you a motor troubleshooting expert? Quiz yourself with our (no pressure) worksheet!
Interested in content about motors? We have plenty to choose from!
Articles:
- 3-phase Motor Types: Synchronous and Induction Motors
- Understanding Delta Wound Motors for Industrial Applications
- Common Motor Windings and Wiring for Three-Phase Motors
- Brushed vs. Brushless DC Motors
- Field-oriented Control (Vector Control) for Brushless DC Motors
- Teardown: What’s Inside a 3-Phase Induction Motor?
Textbook:
I much prefer the standard method of displaying via ladder style diagrams as shown in NFPA79 etc, rather than overly artistic versions used in the articles.