{"id":67641,"date":"2022-05-10T07:47:20","date_gmt":"2022-05-10T05:47:20","guid":{"rendered":"https:\/\/www.gahzly.com\/relay-benefits-and-uses-1\/"},"modified":"2022-05-10T07:47:20","modified_gmt":"2022-05-10T05:47:20","slug":"relay-benefits-and-uses-1","status":"publish","type":"post","link":"https:\/\/gahzly.com\/en\/\u0645\u0642\u0627\u0644\/relay-benefits-and-uses-1\/","title":{"rendered":"Relay benefits and uses 1"},"content":{"rendered":"
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Relay benefits and uses<\/h2>\n<\/div>\n<\/header>\n<\/div>\n<\/div>\n
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Relay<\/h2>\n<\/div>\n<\/header>\n<\/div>\n<\/div>\n
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\"Relayrelay, The relay is an important electronic and electrical component for use in many different applications. such as electronic circuits, and electrical control panels.<\/p>\n

Where the relay is available in a variety of types, shapes and sizes, commensurate with the nature of use. Such as the effort of the relay and the number of points of contact.<\/p>\n

Follow this article with us to learn about the types of relays and how they work and examine them.<\/p>\n

<\/span>Relay working principle<\/h2>\n

The principle of the work of the relay depends on the delivery of electric current through contact points, when feeding its coil with a direct current or an alternating current; The main benefit of this process is to operate a high-powered load by feeding the relay coil with a small current, or by giving a signal from the PLC, or a signal from electronic boards…etc.<\/p>\n

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Cases of connecting and disconnecting the relay<\/figcaption><\/figure>\n<\/div>\n

<\/span>relay components<\/h2>\n

The relay consists of several parts:<\/strong><\/p>\n

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  1. copper coil.<\/li>\n
  2. invert the file.<\/li>\n
  3. Points of contact ( normally opened<\/em> , normally closed<\/em> , and common).<\/li>\n
  4. spring.<\/li>\n
  5. External terminals.<\/li>\n<\/ol>\n
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    relay components<\/figcaption><\/figure>\n<\/div>\n

    <\/span>Types of relay points and their composition<\/h2>\n

    1- A switch with one input and one output (SPST):<\/p>\n

    This type has one current input and one output point. It is used to connect or disconnect a single line or path in a circuit.<\/p>\n

    2- A switch with one input and two outputs (SPDT):<\/p>\n

    This type has a common input point (C) and two outputs, one closed and the other open.<\/p>\n

    3- A switch with two inputs and one output for each input (DPST):<\/p>\n

    4- A switch with two inputs and two outputs (DPDT):<\/p>\n

    This type has two inputs and each input has two outputs. Where (Throw) is the number of outputs per pole.<\/p>\n

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    Different points for the relays<\/figcaption><\/figure>\n<\/div>\n

    <\/span>Types of relay<\/h2>\n

    1- Reed relay<\/strong><\/p>\n

    Its working principle is based on magnetic cutting, Its contact points are connected when a magnet is near it.<\/p>\n

    2- Latching relay<\/strong><\/p>\n

    Its principle of operation is based on continuous conduction when pressed.<\/p>\n

    3- Contactor relay<\/strong><\/p>\n

    It is similar to the idea of the work of the relay, but it is used to feed large loads, Like electric motors.<\/p>\n

    4- Mercury-Wetted relay<\/strong><\/p>\n

    It conducts and separates by a drop of mercury inside a tube, If the connection is in a vertical position, In the case of separation be in a horizontal position.<\/p>\n

    5-<\/strong> Solid-state relay<\/strong><\/p>\n

    Does not depend on conduction through mechanical parts and magnetic coil, Rather, it depends on the connection through an electronic board designed in a certain way to perform the function of the relay. This type is more expensive compared to mechanical relays.<\/p>\n

    6- Overload protection relays<\/strong><\/p>\n

    It is used to protect loads from rising and falling electric current.<\/p>\n

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    Multiple forms and types of relays<\/figcaption><\/figure>\n<\/div>\n

    Different shapes and types of relays<\/p>\n

    <\/span>Choosing the right relay<\/h2>\n

    The nature of the choice of relay depends on several factors, namely:<\/strong><\/p>\n

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    1. value and type of relay coil, Available in (6v,9v,12v,15v,24v,36v,48v).<\/li>\n
    2. Maximum contact current, It ranges from 1A-60A.<\/li>\n
    3. The number and type of contact points, Such as (DPDT, SPST, DPST, SPDT).<\/li>\n<\/ol>\n

      <\/span>How to check the relay<\/h2>\n

      1- Put the red probe into the ohm port, and the black probe in the common port (COM).<\/p>\n

      2- Turn on the multimeter.<\/p>\n

      3- Set the increment knob to the ohm symbol, And choose the conductivity symbol by pressing the switch button, if any.<\/p>\n

      *<\/strong> Placing the red probe on either end of the joint, And the black probe is on the closed point (NC), and we note the following<\/strong> :<\/p>\n

      If a read appears, or hear a buzzing, Indicates that the contacts are in a connected state, and this is normal and healthy if the coil is not being fed.<\/p>\n

      When feeding its coil, it must be ensured that the relay point (NC) is connected to the joint.<\/p>\n

      4- Keeping the red probe as it is, We move the black probe on the open point (NO), and note the following<\/strong> :<\/p>\n