Electric Motor Control

10th Edition
ISBN: 9781133702818



Electric Motor Control

10th Edition
ISBN: 9781133702818
Textbook Problem

Describe the operation of the line diagram in Figure 32–5 (B) by adding jumper wire “D” only.

To determine

Explain the function of the line diagram by adding the jumper wire “D” in Figure 32-5 (B).


Refer to Figure 32-5 (B) in the textbook, which shows the line diagram of an AC, full-voltage, two-speed magnetic starter for one-winding (reconnectable pole) motors.

In the circuit, by adding the jumper wire “D”, the “slow” push button that is normally open will be shunted or bypassed. When the slow push button is pressed, there will not be any effect in disturbing the “fast” control circuit, and the slow speed gets energized...

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