The “Automatic Time Switch Control”

If it is desire to automatically energized and de-energized an electrical equipment at specific time of day, Automatically Time Switch (ATS) is use. One particular example is the switching of the street lights “ON” and “OFF” at 6:30 A.M.

Control Operation

The ATS has a disk D (A clock) which rotates 1 revolution for every 24 hours. The rotor scaled 24 hours at the ream. See figure (A). Each hour has a slot every 15 minutes interval. To this slot a white pin W and orange pin 0 can be inserted and detached. Both the orange pin and the white pin can be inserted in the slot with an indication of certain time. The time in the slot where the orange pin is inserted is the time desire to energize a certain machine. The white pin is inserted in the slot with the tome desired to de energized the machine.

For example, in figure (A), it is desire to energize the street lights at 6:00 PM. An orange pin 0 is inserted into the slot with 18:00, (military time) indication. If the street lights are to be de-energized at 6:30 AM, the white pin W is inserted into the slot with 6:30 AM indication. If we make a setting adjustment at 11:30 AM, the rotor is rotated so the present time rod P is pointed at 11:00. Both pin 0 and pin W will pass the switch S  at 6:00 PM and 6:30 AM respectively. when pin 0 pass the switch S  at 6:00 Pm, switch S will close its contact to energize the lights. At 6:30 AM pin W will pass the switch S and open its contact to de-energize the street lights.

(A) Disk of ATS where a white pin W is inserted at 6:30 AM and an orange pin 0 is inserted at 18:00 (6:00 PM).

 

(B) The ATS with street lights load.