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In place of the push buttons in Figure 21–4, draw a heavy-duty selector switch for forward-reverse-stop control. Show the target table for this selector switch. FIG. 21–4 Mechanical interlock between the coils prevents the starter from closing all contacts simultaneously. Only one contactor can close at a time.
Electric Motor Control
Electric Motor Control
In place of the push buttons in Figure 21–4, draw a heavy-duty selector switch for forward-reverse-stop control. Show the target table for this selector switch.
FIG. 21–4 Mechanical interlock between the coils prevents the starter from closing all contacts simultaneously. Only one contactor can close at a time.
Draw a heavy-duty selector switch in the place of the push buttons in Figure 21-4.
Explanation of Solution
Given data:
Refer Figure 21-4 in the textbook for mechanical interlock.
Discussion:
Modify the given figure with the replacement of push buttons by the selector switch as shown in Figure 1.
The forward-reverse-stop control of the contactors can be achieved using the selector switch. When the switch is at terminal A1, the forward contactor will be in operation...
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