Which switch is used for the automatic control of the motor?
Right Answer is:
Hand OFF auto switch
Starting or stopping some motors automatically is very useful. The ability to control the motor manually is usually retained. That is, the motor control is provided with a selector switch to select either manual or automatic control. A very common selector switch used for this purpose is called a hand-off-auto switch (HOA). These switches have three possible positions—hand, off, or auto. The symbol for an HOA switch is shown in Figure
Because the HOA selector switch is a maintained switch, it operates in the same manner as the local-remote switch example.