1. Electromagnetic relays, which are also more commonly used, produce electromagnetic effects by adding electric voltage to both ends of the online loop, so that the cortex overcomes the pull of the spring to the sweet end, thus acting as a switch break and closure。
2. Solid state relay means a device that is separated by an electronic component performing its functions and without mechanical motion components, entering and exporting。
3. Temperature relays, which are sensitive to external temperatures and then reach a certain value to shut down or shut down a relay。
4- tequila reed relays, actions of the reeds with the dual effect of contacting the reeds and the mercantile magnetic circuits to shut down or close them。
Time relays, in addition to being controlled by the input signal to shut and close, are also subject to time control, such as delay breaks。
6 hf relays for the switchover of hf, radio frequency, special requirements。
There are other kinds of relays, like polarized relays, optical relays, etc., that can be selected according to their needs
The use of relays in our homes is important to provide the most basic means of livelihood, but care must be taken to use relays to avoid unnecessary trouble. So what's the role and rationale of relays and how they are used correctly? Now let's see。
I. What's the role and principle of response
The role of relays: it is possible to increase the range of the entire circuit and to control large power circuits so that they can operate automatically. Relays: when the input is at a fixed value, a change in the working state can be made and the working state can be changed to avoid an accident。
Ii. Correct use of relays
1. Relays are used as far as possible on the basis of instructions and each parameter is within the prescribed range in order to ensure sufficient safety. Again, the load and time of use of relays are uncertain, after all, they vary according to the surrounding environment and load。
2. If direct stream relays are to be used indoors, rectangular waves will be required for execution. Communications relays are used indoors, which require the use of sine waves. If relays are to be better used, they should not be exposed to impact, which would easily lead to damage to internal components。
3. Relays are used in such a way as to ensure that the surrounding environment is moderate in temperature and humidity and does not contain more harmful gases in the air, which would affect their use. In the case of polarized relays, consideration is given to the voltage properties of the wire, thus ensuring its normal use。
The role and rationale of relays and the correct use of relays are described here. Do you understand? Relays are good, but before they are used, it is important to know the relevant knowledge so that there is no trouble in using them。
Relays work as follows: heat is generated from currents flowing into the thermal component, which transforms double-metal pieces with different inflation factors and, when the shape reaches a certain distance, pushes forwards, disconnects the controlled circuits, thus causing the contact to lose power, the main circuit to be disconnected and overloading of the electric motor。
Relays:
1. Expand the scope of control, for example, when a multi-touch relay control signal reaches a fixed value, it can be replaced, disconnected and connected to multiple circuits in a different form in the contact group。
2. Magnify, e. G., sensitive relays, intermediate relays, etc., with a very small amount of control to control large power circuits。
3 integrated signals, for example, when multiple control signals are entered into multiple circuits of relays in the prescribed form, are combined to achieve the intended control effect。
Automatic, remote-controlled, monitoring, for example, relays on automatic devices, together with other appliances, can form a program control line and thus be automated。
Relays are key devices in the smart prepaid energy table, the life of which, to some extent, determines the life of the meter, and their performance is critical to the operation of the smart prepaid energy table。
In view of the large number of domestic and external relay producers, the scale of production varies widely, the level of technology varies widely and the performance parameters vary widely, and it is therefore essential that electrical meter producers have a well-developed set of detection devices in order to ensure the quality of their meters when testing the type of relay。
In accordance with the requirements for testing the performance parameters of relays, the test items can be divided into two broad categories, one for testing without load currents, such as action values, contact exposure resistance, mechanical lifetime, and the other for testing with load currents, such as contact exposure, electrical lifetime, excess capacity。
Relays are of many kinds and can be classified by input into voltage relays, current relays, time relays, speed relays, pressure relays, etc。
It can be divided into electromagnetic relays, sensory relays, electric relays, electronic relays, etc。
Control relays, protection relays, etc. Can be divided by use, by type of input, into availability and measurement relays。
