A specialized segment of the electrical construction and maintenance industry, AC motor control is an area that requires specific knowledge in order to troubleshoot motors effectively and ensure ...

Ladder diagrams are also drawn with other helpful identifiers to aid a technician in electrically troubleshooting a system. Each horizontal line on the diagram is identified by a number printed to the ...

In Part 1 of this two-part series, we presented a 3-phase, 480VAC motor circuit with its associated controls (Figure). We stepped through a logical, systematic approach to troubleshoot the main power ...