Working principle of double acting relay
The action of the double acting relay is similar to the intermediate relay of the guide rail. Generally, to increase the number and capacity of contacts, and to increase the starting power to improve reliability, the double acting relay is generally a fast relay.
The main function of the double acting relay is twofold: one is the electrical isolation between the two circuits; the other is to provide more contact capacity and quantity.
There are no specific regulations and conventions for the use of the heavy-duty relay. It is generally used for the relay operation box of the line. It is mainly used to provide more contacts and capacity for the equipment. When the equipment provides insufficient contacts, it needs to go through the heavy-duty relay. The contact becomes several contacts to meet different needs; or the contact capacity provided by the device is very small, and the contact capacity needs to be increased.
The function of the double acting relay is similar to that of the rail intermediate relay. What is the difference between them? What does "heavy action" mean? From a practical point of view, the functions of the heavy-duty relay and the guide rail intermediate relay are indeed similar. The main difference is that the fast-track guide intermediate relay is generally used for the heavy-duty relay. The main function is the isolation between the two electrical circuits; the other is Provides more contact capacity and quantity, just like the rail guide intermediate relay.
"Heavy action" means that when the contacts of the signal and the action relay are not enough, connecting the relay in series can increase the number of nodes.
There are three main functions of the double acting relay:
One refers to the expansion of contacts (for example, there is a signal that needs to be used in two places, and the signal source has only one pair of contacts. At this time, it is expanded to two pairs of contacts through replay, which are used for two places respectively).
The second is to achieve electrical isolation between the two circuits.
The third is to provide greater contact capacity.