This race situation between the reclosing of the NO PB switch and the re-opening of the NO motor-starter auxiliary seal-in contacts can cause a serious ____________ ____________ with the stacked pushbutton method of jog control for a large electric motor:
A single quick-jog operation with quick-release of the PB switch may command a ____________ condition due to this difference in rate of travel.
A) safety hazard; run
B) safety hazard; stop
C) precaution; run
D) all of the answers
Show Answer
Answer:A
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