The relay is the main protection, as well as the switching apparatus in most control processes and equipment. All relays react to one or more electrical values, such as voltage or current and open or close the contacts of the circuit. Relay is a switching device that works to isolate or change the condition of the electric circuit from one state to another.
Protective relay constantly monitor the following parameters: voltage, current and power. If these parameters deviate from established limits, the relay gives rise to anxiety or isolates this specific scheme. These types of relay are used to protect equipment like engines, generators, transformers, etc. p.
There is a relay of relay of relay include that connect different components and devices on the network and restore their operation after the electrical problem disappears. The control relay switches the contacts in such a way as to increase the voltage in the event of a change in transformer discharge.
Auxiliary contacts are used in switching and other protective devices. The control relay monitors the conditions of the system, such as power and in accordance with this gives rise to anxiety. They are also called guide relay.
Depending on the principle of action and structural features, the relay is of different types – electromagnetic relay, thermal relay, various power relay and so on.
Electromagnetic relay are built on the basis of electrical, mechanical and magnetic components and have working coils and mechanical contacts. Therefore, when the coil is activated from the power source, mechanical contacts open or close. Type of power – alternating or direct current.
The solid -state relay uses solid -state components that perform the operation of switching without moving parts. In hybrid relay, components are electromagnetic and electronic. As a rule, the input part contains an electronic circuit that performs the edits and carries out other control functions, and the output part includes an electromagnetic relay. Thermal relay is based on the effects of heat, which means that with an increase in the ambient temperature above the limit, the contacts are given a signal to change one position to another. Vibrorals consist of a pair of magnetic strips that are sealed in a glass tube. Helps stop the equipment and inform the personnel about increased vibrations.
As you can see, there are many types of relay that are arranged differently and are designed to perform different functions. If you do not specialize in an electrician, then we advise you to leave work on the selection of the right type of relay to a professional.
