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Use a knob switch to control the electric valve on-site for three operations: open, stop, and close. Stopping means cutting off power, while opening means the motor rotates in the forward direction. For example, when the switch is turned to the on position, the limit switch activates; is it still necessary to turn the switch to the off position in order to cut off the power?

2018-01-16View Original

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Use a knob switch to control the electric valve on-site for three operations: open, stop, and close. Stopping means cutting off power; opening means the motor rotates in the forward direction; closing means the motor rotates in the reverse direction. For example, when the switch is turned to the on position, the limit switch activates; is it still necessary to turn the switch to the off position in order to cut off the power?

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