The same type of interlock protection (the stoppage of all motors with the loss of any one) can be provided by series-wiring the NC overload-relay control contacts of each respective motor starter in a single control line of another control-relay solenoid coil.
Multiple sets of NO contacts on the overload-control relay are then used to replace the NC overload-relay contacts in each respective motor- starter solenoid control line.
When two or more motors are interlocked in this fashion, the control scheme is described as _______________ overload protection.
A) none of the answers
B) sequential
C) auxiliary
Show Answer
Answer:C
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