Power delay relay principle
If the relay contact is normally closed when the power is turned on, then when the power is turned off, it does not immediately become normally open, but will wait until the set delay time is reached.
The so-called power-off time relay is in the time relay operating voltage is turned off after the start of its work as follows: ATS power-off time relay
After the time relay is energized, the internal magnetic relay continues from the normally closed contact to the normally open contact. When the user turns off the time relay power, the time relay starts to delay, and the contact continues to hold the state. The time delay of the time relay The contact changes from normally open to normally closed to form a regression and waits for the next delay. After power failure in order to allow time relay can get a very good delay so the power delay relay IC will use low-power integrated circuits, the total need to have a large capacitor as a voltage livestock. In general, two capacitors are needed to do livestock work. The energy stored in a capacitor needs to supply power to the integrated circuit and need to provide enough power. Otherwise, the integrated circuit will stop the clock when the time has not arrived. Not meet the user set the purpose of the. The other capacitor provides a magnetic hold relay that receives the control signal output by the integrated circuit as a result of the delay time to drive the magnetic hold relay to return to the initial state.
And the other is to make the electric shock to the normally closed direction to set up an airbag, adjust the airbag deflated speed to achieve the purpose of power delay
