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 ...

Control circuits can be connected directly to the line leads (as shown in the diagram), or can be isolated from the power circuit with a transformer. Lower voltages, such as 120 or 240 V, are used if ...

A new professional guide on industrial circuit breakers has been released, covering essential types, applications, and ...

All questions and answers are based on the 2011 NEC. Q. What is the Code rule for motor control circuit overcurrent protection? A. Motor control conductors that aren’t tapped from the branch circuit ...

A motor drive controls the speed, torque, direction, and resulting horsepower of a motor. Dc drives typically control a shunt-wound dc motor, which has separate armature and field circuits.

The most ignored portion of the circuit is the cables. None of the other components will work if you cannot provide enough current at the proper voltage.In this story: Battery pack Battery cables ...

Electric-motor control requires electronic circuits, which until a few years ago were made with discrete components because of the voltages and currents involved.

Testing electric-motor drive controls can be optimized by employing digital twins within a single development platform and via test automation, thus creating a continuous testing workflow. How the ...