Compare the static relays to electromagentic relays. SSR are faster, quieter, smaller, more reliable, and last longer than electromagnetic relays. The current and potential transformers are subjected to high burdens in case of electromagnetic relays. ADVANTAGES OF STATIC RELAY The following are the benefits of static relays. In some Industry, there is a redundant system for example if one pump fails the second pump will automatically start. What are the advantages of static relay over electromagnetic relay? Solid State Relays (SSR). o Low power consumption as low as 1mW. Since the introduction of solid-state relays some decades ago, the debate over which is better, solid-state relays (SSRs) or electromechanical relays (EMRs), has gone on. The term ‘static’ implies that the relay has no moving mechanical parts in it. The power consumption is very low as most of the circuits are electronic. No bearing friction or contact troubles exist. Types of Relay. It is smaller in size. These relays handle high currents and are long lasting. o No moving contacts; hence associated problems of arcing, contact bounce, erosion, replacement of contacts. When this operating current increases, coil energizes the electromagnet. 162 0 obj <> endobj The use of printed circuits eliminates the wiring errors and mass production is possible. Compact Size. A protective system is formed by static relays and electro-mechanical auxiliary relays. acknowledge failure means that you get warning that one has failed #7. The Solid State Relay (Static Relay) Overview (on photo: Basler Electric BE1-27 Solid State Protective Relay, Over/Under Voltage) jiguparmar The Solid State Relay (Static Relay) Overview History of Relay The static relay is the next generation relay after electromechanical type.The Solid Static relays was first introduced in 1960’s. The VA burden of these relays is higher than static and numerical relays. Functions: 1 relay can perform various functions. The disadvantages of Electro-mechanical relays are. Some of the advantages, disadvantages and … Hence, the Potential and the Current Transformers should have a higher capacity. The low energy levels required in the measuring circuits make the relays smaller and compact in size. h޴X�r�8����]SN�j*U�-��؎Wrn夦h �8�H��o��{$%�R�3ƭh }��#,!CW��� G"�˵@H�}(��P�%�͹*�\ ��܆�p��+\#�a�}��@�2@ It will take much longer time to be replaced the all electromagnetic relays by micro processor based static relays. Delay in operation: Easily provided They use one or more digital signal processors (DSP) optimised for real time signal processing, running the mathematical algorithms for the protection functions. Hence can be used in vessels ie, ships, aircrafts etc. 3. 2. some of the relay like over voltage, over current protection , under voltage protection, earth fault protection. 5. The static relay gives the quick response, long life, high reliability and accuracy and it is shockproof. The moving parts are present only in the actual tripping circuit and not in the control circuit. Electromagnetic Relay Definition: Electromagnetic relays are those relay which operates on the principle of electromagnetic attraction. Hence any functional characteristics as per the requirement can be obtained by the static relays. A wide range of control application #8. speed of operatio.scan time in mili second An SSR depends on electronic devices such as SCRs and triacs to switch without contacts. The static relay consumes very less power because of which the burden on the measuring instruments decreases and their accuracy increases. In fact, both of them provide isolation between the input and output circuit. Hence can be used in vessels ie, ships, aircrafts etc. However, static overcurrent relays offer several advantages over the electromagnetic form:. Hence there is no mechanical noise. %PDF-1.6 %���� It has very high life time. In Electromagnetic relays operating current flows through the coil. An EMR provides switching through the use of electromagnetic devices and sets of contacts. there are different types of relay used in electrical field. Today, we will dive into some of the advantages of PLCs. 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