For the name of the intermediate relay, you may not be particularly familiar with it. But in life, in the circuit connections we can't see, the function and function of the intermediate relay is very powerful. If you have a little understanding of the circuit, you will know that the intermediate relay is everywhere, playing it in many places. The role. So what is the role of the intermediate relay? Today, Xiaobian will give you a detailed introduction to the seven functions of the intermediate relay, I hope to help everyone.
What are the functions of the intermediate relay?
1. Replace small contactors
The contacts of the intermediate relay have a certain load capacity. When the load capacity is small, it can be used to replace the use of small contactors, such as electric shutters and some small appliances. This has the advantage that it can not only serve the purpose of control, but also save space and make the control part of the appliance more delicate.
2. Increase the number of contacts
This is the most common use of intermediate relays. For example, in a circuit control system, when a contactor of a contactor needs to control multiple contactors or other components, an intermediate relay is added to the line.
3. Increase the contact capacity
We know that the intermediate relay's contact capacity is not very large, but it also has a certain load capacity, and the current required for its driving is very small, so the intermediate relay can be used to expand the contact capacity. For example, it is generally not possible to directly use the output of the inductive switch or the triode to control the electrical components with relatively large loads. Instead, an intermediate relay is used in the control line, and other loads are controlled by the intermediate relay to achieve the purpose of expanding the control capacity.
4. Conversion contact type
In industrial control lines, it is often the case that the control requires the use of a normally closed contact of the contactor for control purposes, but the normally closed contact of the contactor itself has been used up and the control task cannot be completed. At this time, an intermediate relay can be connected in parallel with the original contactor coil, and the normally closed contact of the intermediate relay can be used to control the corresponding components, and the type of the contact is switched to achieve the required control purpose.
5. Used as a switch
In some control lines, the switching of some electrical components often uses an intermediate relay, which is controlled by the opening and closing of its contacts. For example, the automatic degaussing circuit commonly used in color TVs or displays, the triode controls the on and off of the intermediate relays, thereby achieving control degaussing. The function of the coil on and off.
6. Conversion voltage
7. Eliminate interference in the circuit
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