And the air is quickly expelled through the air outlet. After the suction coil is de-energized, the relay relies on the spring to recover. The length of the delay time can be changed by adjusting the size of the air inlet hole of the air chamber with a screw.
The time from when the coil is energized to when the delay contact completes the action is the delay time of the relay. After a certain period of time, the piston rod descends to a certain position, and then the delay contact action is pushed through the lever to make the moving contacts open and close. The air in the air chamber becomes thinner, causing the piston rod to be damped and slowly descend. When the piston rod starts to move downward under the action of the released spring, the rubber film is concave downward. However, the piston rod and the lever cannot fall with the armature at the same time, because the upper end of the piston rod is connected to the rubber film in the air chamber. When the coil is energized, the armature and the pallet are attracted by the core and move down instantaneously, making the action contact close or open. Time relay is widely used in remote control, telecommunication, automatic control and other electronic equipment, and is one of the most important control components. However, configuring a certain number of time relays and intermediate relays can do it. It is a cycle of time-delay closing and opening. After closing for a period of time, it will open again. In addition, a time relay alone may not be able to do close. Generally speaking, the delay performance of the time relay can be adjusted within the range of design, so as to facilitate the adjustment of its delay time. After the timing ends, its working contact opens or closes to promote the subsequent circuit work. When it receives the start signal, it starts timing. The time relay is generally used to control the motor starting process with time function.Īs above mentioned, the main function of the time delay is as an executive device in simple program control. Its characteristic is that there is a delay from the time the attracting coil gets the signal to the action of the contact.
Time relay is an automatic control electrical appliance that uses the principle of electromagnetic or mechanical action to delay the closing or opening of contacts. In many control systems, use the time relay to achieve delay control. The time relay is a very important component in the electrical control system. Ⅰ Time Relay Basics 1.1 What is a Time Delay Relay? Ⅸ Frequently Asked Questions about Time Delay Relay Basics Ⅷ Case Study: Time Relay Switch in Light Circuit Ⅱ Understanding Time Delay in Relay Circuitħ.2 Two Points for Attention in Using Time Relays
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