Static Relay: The term ‘static relay’ is generally referred to a relay incorporating solid state components like transistors, diodes, resistors, capacitors, etc. We previously learned about different types of relays, and Numerical Relay was one of them, so today we will focus more on this type of relay. 3 Models available MCGG 22 Single phase overcurrent with instantaneous element. Two phase with instantaneous element. For years we have been using static relays and magnetic relays for protecting an electrical network, now when the microprocessors got evolved the protection devices also got evolved. Hence the relay coil is energized under fault condition due to the difference quantity of the current. It will take much longer time to replace all electromagnetic relays by micro processor based static relays. • Static differential relay is mostly applied in protection of generation and transformers against any type of internal fault similar to that of electromagnetic type differential relay. Electromagnetic relays are those relays which are operated by electromagnetic action. The relay is enclosed in an 52 case with no upper contact block. APPLICATION The type IAC66S relay is used in the protection of industrial and … In a typical application the overcurrent relay is connected to a current Overcurrent Units An overcurrent unit and the signal detector must both operate simultaneously before an output voltage will appear between terminals 1 and 2. IAC Type, Inverse, Long Time, 4-12A, 40-160A Instantaneous, 60Hz, Standard & High Dropout, Static Time Delay, Time Overcurrent Relay. Electromagnetic Relay. Figure 2: Cost Comparison of Numerical relay with electromechanical and static relay 3. The distance relay type RYZK was introduced in the 1950s. It contains two relaying units, over current units and the other a directional unit. The components of the SBF relay are connected as shown in Fig. Overcurrent Relay Characteristics and Implementation An overcurrent relay ANSI device number is 50 for an instantaneous overcurrent (IOC), 51 for a time over current (TOC). STATIC TRANSFORMER AUXILIARY RELAY TYPE STA RELAY STA2O1. 112 ABB ITE-47H Static Undervoltage Relay ITE-47H ITE-47H 113 ABB ITE-50H Static Instantaneous Overcurrent CAPE_IOC_1 PFD+GFD CAPE_IOC_1 114 ABB ITE-51I Static Overcurrent I CAPE_TOC CAPE_TOC 115 ABB ITE-51Y Static Overcurrent VI CAPE_TOC_IOC CAPE_TOC_IOC 116 ABB ITE-59G Static Ground Overvoltage Relay ITE-59G ITE-59G Numeric relays, on the other hand, are programmable relays where the characteristics and behavior can be programmed. 1 at the relay will be dependent on the fault type. overcurrent units, a DC operated static timer unit, and a target and seal-in unit. Constructional Details and Operation of Non Directional Over Current Relay (Wattmeter Type) A directional over current relay operates when the current exceeds a specified value in a specified direction. UNIT II - RELAY CIRCUIT Static relay circuit (using analog and digital ic’s) for over current: The Solid State Relay (Static Relay): History of Relay: The static relay are next generation relays .The Solid Static relays was first introduced in 1960’s. Overcurrent Relay Setting Calculation Xls EEP Electrical Engineering Portal Energy And Power For All. Fig: 1 Directional static overcurrent relay The directional relay is nothing but a directional power relay which operates when the power in the circuit flows in a particular direction. Find here Overcurrent Relay suppliers, manufacturers, wholesalers, traders with Overcurrent Relay prices for buying. Position of relay: Relay can be installed at any location and at any position. All the Relays react to voltage or current with the end goal that they open or close the contacts or circuits. Thus the relay operates and opens the circuit breaker so as to trip the circuit. Introduction To Relay & Different Types Of Relays | Its Terminals, Working & Applications Relays are the essential component for protection & switching of a number of the control circuits & other electrical components. It consists of two units-an overcurrent element developing positive torque and a current-voltage directional element which either aids or opposes the overcurrent element depending on the phase angle between the current and voltage. The applications are: tion battery is available, the circuit opening type relay in conjunction with ac series trip coil is used to trip the circuit breaker. The Type SGC relay is a static negative time overcurrent relay. A big difference between conventional electromechanical and static relays is how the relays are wired. Historically inverse time-overcurrent protective relays were of the electro-mechanical type. ... static modular overcurent relay type MCGG 42. 10 Internal block diagram of the SE Static Motor Protection Relay (instantaneous type) Thus it requires to serve the system voltage as well as the system current. It is of two types: instantaneous over current (IOC) relay and definite time overcurrent (DTOC) relay. Where, I is the relay current, t is the time of operation and n is the characteristic index of relay and K is constant. No effect of Gravity on operation of static relay. For example, a relay including function 51 would be a timed overcurrent protective relay. Electromechanical and static relays have fixed wiring and the setting is manual. Inverse overcurrent is normally associated with the overcurrent relay types, and the operation time is inversely proportional (in certain degrees) with their overcurrent ratio. Instantaneous overcurrent relay type RRMJ Electromechanical line distance relays Line distance relays were introduced in the 1940s. The last relay was manufactured 1985 and is still in use in many countries. Fig. They represented state of the art in the electromechanical era. Overcurrent relay. Functions: 1 relay can perform various functions. These relays also have two settings: the pick-up current and the curve General Electric 12IAC77A11A Modern electrical protection relays are mainly micro processor based, but still electromagnetic relay holds its place. Static overcurrent relay is made in the form of a single unit in which diodes, transistors, resistors, capacitors etc. 1 ≡ Electromechanical Relays These type of relays are made of a coil that induces a magnetic field when it get energized and moves the armature, which closes of opens the contacts. GLK-100644 TABLE OF CONTENTS Page PRODUCT DESCRIPTION 3 GENERAL 3 ... OVERCURRENT UNiTS 13 TIMERS 13 POWER SUPPLY ALARM 13 ACCURACY 13 CASE 14 DIMENSIONS 14 WEIGHT 14-2- ... relay will provide a delay equal to thesum of all switches for that timer. The Solid State Relay (Static Relay) Overview (on photo: Basler Electric BE1-27 Solid State Protective Relay, Over/Under Voltage) 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 differential relay measures the vector difference between two similar electrical quantities say V or I. Three IAC66S relays are required for complete 3 phase protection. Reactance type relay is a high speed relay. Induction Type Overcurrent Relay (Non-Directional): This Induction Type Overcurrent Relay works on the induction principle and initiates corrective measures when current in the circuit exceeds the predetermined value. 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