Analysis of action principle of time relay

The sensing system needs to be delayed for a period of time after obtaining the input signal, and then the system executes the output signal of the action, and then controls the electric circuit of the control circuit. It is widely used to control the production process in accordance with the principle of time to develop the process. There are many kinds of time relay, which are commonly used in electromagnetic, electric, air damping and transistor.

This unit to JS7-A series air damping type time relay, for example, it is divided into two types of power delay and power delay.

For cm-pss type 1, when the coil is energized, the armature 2 is absorbed, the instantaneous contact 15, 16, 17, 18, 19, 20, 21 delay contact 22, after a period of time before action. Can cause delay delay contact is closed: the delay of contact action of the piston rod 8 to move up, but the rubber membrane 6 lower space with the outside world only 14 holes connected to the external air negative pressure generated in the rubber film 6 lower space slowly enter, so the piston rod 8 is only slowly upward, to delay action. 1 when the coil power, the rubber membrane 6 lower air through the one-way valve 6, 31 and 13 together to form fast excluded from the top of the 6, so the instantaneous contact 15, 16, 17, 18 and 19, 20, 21 delay contact, 22 instantaneous (reset). Relay manufacturers