Latching relays are 'bi-stable,' meaning they have two relaxed states. Relay – Its Application, Parts And Function. Distance relay applications. As the Optocoupler does not allow direct electrical connection between two sides, the main application of the Optocoupler is to isolate two circuits. There is one type of relay which functions depending upon the distance of fault in the line. In fact, some of the first computers ever built used relays to implement Boolean gates.. More specifically, the relay operates depending upon the impedance between the point of fault and the point where relay is installed. The Mho relay combines the properties of impedance and directional relays. Although Frame Relay is popular due to its relatively inexpensive nature, it is being replaced in many areas by other faster technologies such as asynchronous transfer mode. Relay have difficulties in distinguishing between Fault currents at one point or another when fault impedances between these points are small, thus poor discrimination. What is the electromagnetic relay. This application note has been written in response to the numerous application problems resulting from improper relay coil suppression. Relay is an electrically operated “switch”. PDF Latching relay is really a generic term that is used to describe the type of relay that maintains its position after the power is removed. This not only saves energy, but it is a safer means to starting the car than having all that wiring and heavy electrical power usage. In another aspect, Relay is an electrical device used to close, protect and cut the control circuit. C'mon over to https://realpars.com where you can learn PLC programming faster and easier than you ever thought possible! Relays are used to provide time delay functions. We have electric switches in our home to control light, fan, motor etc. These contacts in turns close and complete the circuit breaker trip coil circuit hence make the circuit breaker tripped for disconnecting the faulty portion of the electrical circuit from rest of the healthy circuit. Applications of Optocoupler. It is used in the control panels, manufacturing, and building automation to control the power along with switching the smaller current values in a control circuit. Relay Function 4. May 26, 2020 October 7, 2018 by Amit Abhishek. ; In terms of the torque equation the relay characteristics can be obtained by making the constant K1 equal to zero. Its characteristic is inherently directional and the relay only operates for faults in front of the relay location. Distance relays respond to the voltage and current, i.e., the impedance, at the relay location. They are used to time the delay open and delay close of contacts. What is a Relay? 2. A typical circuit consists of a number of rungs, with each rung controlling an output. The schematic diagrams for relay logic circuits are often called line diagrams, because the inputs and outputs are essentially drawn in a series of lines. RELAY APPLICATIONS Relays are remote control electrical switches that are controlled by another switch, such as a horn switch or a computer as in a power train control module. Paper Product of Three Random Variables and its Application in Relay Telecommunication Systems in the Presence of Multipath Fading Dragana Krstic1, Petar Nikolic2, Danijela Aleksic3, Sinisa Minic4, Dragan Vuckovic5, and Mihajlo Stefanovic1 1 Faculty of Electronic Engineering, University of Ni s, Nis, Serbia 2 TigarTyres, Pirot, Serbia 3 College of Applied Technical Sciences Ni s, Serbia Learn how Azure Relay service allows you to securely expose services that run in your corporate network to the public cloud. Overcurrent Relay Definition: The overcurrent relay is defined as the relay, which operates only when the value of the current is greater than the relay setting time.It protects the equipment of the power system from the fault current. What is Relay, How does Relay Work & Its Application by. Sunday, March 18, 2018 in Electrical. When an electrical flow is turned off, the latching relay remains in the last state it was in. A relay circuit is used to realize logic functions. The following are some major applications of the relay which is famous for its unique nature. In this article, we will look at how relays work and a few of their applications.­ Because of this, the threshold characteristic is quite compact enclosing fault area compactly and hence, there is lesser chance to operate during power swing and also it is directional. 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