How does the time relay delay the opening action?
1. Time relay generally has two sets of points,
A group of normally open points, also known as moving electric shock (between the two points in the case of the relay is not controlled)
A set of normally closed points, also known as moving off electric shock (between the two points in the relay is not controlled in the case of conduction).
2. Set the delay time of 5 seconds, the time relay from the power of 5 seconds after the time relay action: normally open point closed, normally closed point off. This state lasts until the time relay is out of power.
3. When the time relay is de-energized, the two sets of contacts are automatically reset.
Time relay delay off the moving contact is: when the relay is energized, the movable contact immediately closed; when the relay is powered off, the moving contact is delayed.
There are delay off the dynamic contact: relay power, the dynamic contact immediately disconnect; when the relay power, the dynamic contact contact delay.
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When the coil power (voltage specifications are ac380v, ac220v or dc220v, dc24v, etc.), the armature and the pallet is attracted by the core and instantaneous down, so that instantaneous action contact connected or disconnected. But the piston rod and lever can not fall along with the armature at the same time, because the upper end of the piston rod attached to the rubber chamber in the chamber, when the piston rod in the release of the spring under the action of downward movement, the rubber film with the concave, The air in the air chamber becomes thin and the piston rod is damped and slowly descends. After a certain period of time, the piston rod down to a certain position, then through the lever to promote the delay contact action, so that moving off the contact open, moving contact closure. From the coil power to the delay contact to complete the action, this time is the relay delay time.
The length of the delay time can be adjusted by changing the size of the air chamber inlet with screws. After the suction coil is powered off, the relay relies on the effect of the recovery spring. The air is quickly discharged through the pores.
