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Different Types Of Relays, Their Construction, Operation: What You Should Know
The most basic types of relays are those made of relays. Relay is a term used to describe a device that allows the current in the circuit, from source to output, to turn on and off. In relays there are two different kinds of the current switch: 1. Electric current — electrical current that comes from the power source. 2. Non-electronic current — electrical current that is supplied by a non-powered source. Relays control the latter type, and also some other types. Relays. It may come in the following types: 1- Electric current: Electrical current is one of the simplest types of relays. Electrical current switches in either a positive (positive) or negative (negative) direction. For instance, a battery can be connected in one direction, the power supply in another direction. This switch is called electromechanical. 2- Non-Electronic current: An electric current is connected in a very convenient way. The only requirement being that the current has to flow. The current is fed to the relays by another circuit. For instance, if the circuit is AC, the current is supplied by an AC electrical power supply. The current is switched on and off by the relays. If it is necessary to supply a constant current continuously to the circuit, an electronic relay switches. 3-Latching relay: The Latching Relay is the simplest type of relays. In a latch type of relays, the switching of the current from one contact to another involves turning the contacts by means of a plunger. This type of relay is called electromechanical relays. For instance, if the input current is one and a half A or one and a half volts, the switch can be made to turn on in the positive direction by pulling a spring connected to the plunger. The spring releases only in the negative direction only. This is called the positive-contact relay and is operated by a switch with an electric current of one and half A or one A units. 4-Thermal relay: A relays consists of two metal contacts. These contacts of the relay are heated by placing the heating element under the contact. A thermoelectric switch is used to control the current. A thermoelectric current switching device is called a relay. A heater will be used to heat the contacts. 5-Power variably relay: A power variably relay is connected in both directions of the switching process.
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