• Very low overshoot. RS611006-AA | ABB Combined Overcurrent and Earth-fault Relay. Two groups of protection settings. ENGLISH / User's Manual Communications IEC60850 SIL-A, Communication Software for SIA & SIL protection relays. All phase, earth and sensitive earth fault overcurrent elements can be independently subject to directional control. General data reading: Complete model, Version, Serial number, etc. B. Get 10% off. The relay module is then connected to the fault circuits so tests can be performed. 6) Fault Current in Secondary (Ifsec): For Overcurrent Setting we consider Three Phase Fault Current and for Earth Fault we consider , Single Phase Fault Current. Two stages setting for earth fault. • … DIP switches are provided on the front panel for pick up and time delay settings. The SIA-F is an overcurrent protection relay with a switched auxiliary power supply (24-220 Vdc / 48-230 Vac). The relay can be also power supplied by a USB cable connected to the laptop or an standard power bank. This independent certification gives our customers higher quality and reliability assurance. With all … When excessive current flows in a circuit, it is necessary to trip the circuit breaker protecting that circuit. ⇓, Select your Country* The SICom communications program allows the oscillography record to be downloaded and saved in COMTRADE format (IEEE C37.111-1991). The combined overcurrent and earth-fault relay SPAJ 140 C is intended to be used for the selective short-circuit and earth-fault protection of radial feeders in solidly earthed, resistance earthed or impedance earthed power systems. Numerical Non-Directional earth fault Relay (Non-Draw out) : IRI PRO-V3 RANGE. We will take contact to you within 24 hours. The main application of long time overcurrent relays is as backup earth fault protection. In an over current relay or o/c relay the actuating quantity is only current.There is only one current operated element in the relay, no voltage coil etc. The current measurement is obtained by standard current transformers /1 or /5. 17.1 Earth-fault Relays Earth-fault relay is used to protect feeder against faults involving ground. The relay has a built in high set facility. In an over current relay, there would be essentially a current coil.When normal current flows through this coil, the magnetic effect generated by the coil is not … If fault is behind the relay, 3I 0 will lead -3V0 by about 45 to 60 degrees and hence will lie in do not operate region. 6) Fault Current in Secondary (Ifsec): For Overcurrent Setting we consider Three Phase Fault Current and for Earth Fault we consider , Single Phase Fault Current. 17.2 Relay Co-ordination for Earth-fault Relay Example Consider a feeder as shown in fig 17.3 with earth fault relays R 1 and R 2 . EARTH FAULT RELAY (EFR) or independent over current Relay (OCR) or earth fault relay (EFR). User has a choice of 7 trip time characteristics. Voltage Type: AC. A. This is intended for protection application in medium voltage networks. Definite time for low-set and high-set. These over-current relays need to coordinate with each other such that the relay nearest fault operates first. Promotions. The overcurrent unit and the earth-fault unit continuously measure the phase currents and the neutral current of the object. Depending on the time of operation the overcurrent relay is categorized into following types. Contact Supplier Request a quote. Earth Leakage Relay ₹ 1,000/ Piece Get Latest Price. This process can take several hours depending on the time zone. C. Less than the phase fault relay Your Comments. Webfil make over current and earth fault relay series are software based, non directional, time graded, phase and earth fault inverse time current/high set/definite time protection relays. These networks may have isolated or resistance impedance earthed or solidly earthed neutral points. The Example Over current/Earth fault relay is shown in the below figure. This is intended for protection application in medium voltage networks. 26. Most noteworthy like SIL-A, the ability to easily choose between standard /1 or /5 CTs by software combined with more sensitive measurements provides you the flexibility and reliability you need for complete line protection. 5-30a Reyrolle 7sr10 Overcurrent Earth Fault Protection Relay,... ₹ 5,000/Piece Get Quote Latching Siprotec 7sj81 Overcurrent Protection Relay, For... ₹ 5,000/ Piece However for earth fault protection is better to select minimum available pick up to ensure maximum sensitivity. MIKRO NX1000A Combined Overcurrent & Earth Fault Relay. In case of phase to ground faults, high currents flow to the grounded neutral of the transformer. Nos pondremos en contacto a través de un mail donde le enviaremos el enlace de descarga al manual solicitado. COMBINED IDMTL OVERCURRENT 6 EARTH FAULT RELAY The MH REA200n is designed as a universal, digital microprocessor-based protective relay, integrating both the overcurrent and earth fault protection schemes for definite and inverse time characteristics within one compact unit. Typically, earth faults are single line to ground and double line to ground … As the name suggest both relay are used to sense the earth fault in the system. RS611006-AA | ABB Combined Overcurrent and Earth-fault Relay. These cost-effective protective devices include three phase IDMT elements and definite time elements for overcurrent and earth fault protection. Type CDG 21/61 IDMT Overcurrent and Earthfault Relay with high-set instantaneous unit. are required to construct this protective relay.. In terms of rear ports, SILA is able to manage multiple industrial protocols: SIL-A Advanced has performed a complete set of type tests in Kema Laboratories (The Netherlands). We use cookies to ensure that we give you the best experience on our website. The three-phase over current unit and the earth-fault unit continuously measure the phase currents and the neutral current of the protected object. The T2800 Overcurrent or Earth Fault Relay has a broad application as an earth fault or a single phase overcurrent detection relay. Fault, alarm and tripping records with timestamp. The Reyrolle 7SR45 numeric relay provides both definite time and inverse time overcurrent and earth fault protection functions ensuring sensitivity with an operating setting range of 0.1 to 0.2 ⋅ I rated for phase overcurrent protection. MIKRO NX1000A Combined Overcurrent & Earth Fault Relay. Thus with four relays as shown in fig 17.2 complete overcurrent protection can be provided. The general practice is to employ a set of two or three overcurrent relays and a separate overcurrent relay for single line to ground fault. overcurrent/earth fault unit, type CAG17 can be fitted in the same case to provide instantaneous protection under maximum short circuit conditions and to improve discrimination on time graded protective systems. NUMERICAL/MICROPROCESSOR BASED OVER CURRENT RELAY (OCR) WITH EARTH FAULT RELAY (EFR) or independent over current Relay (OCR) or earth fault relay (EFR). These relays can also be used for other applications, which … Number of Poles: 2 Pole, 3 Pole, 4 Pole, 5 … Automatic reclosing. The relay detects the magnitude of the current and, on exceeding the preset value, an output relay will be activated after a preset time delay. It detects small stray voltages on the metal enclosures of electrical equipment. Overcurrent protection Reyrolle 7SR10. Working Principle of Over Current Relay. The oscillography is downloaded by a communications port. A typical triple-pole overcurrent and residually connected earth fault relay. For full details of the high-set instantaneous units refer to relevant publications. Thank you for … More than the phase fault relay . Improvement in protection is obtained in two ways: The excessive delays of the HRC fuse for lower fault currents are avoided and an earth-fault tripping element is provided in addition to the overcurrent feature. Type CDG 31 is … EN_FANOXTD_DATA_SIL_OCPrimaryDist_SILA-Advanced_R00.pdf, ES_FANOXTD_FICHA_SIL_OCEFDistPrimaria_SILA-Avanzado_R00.pdf, EN_FANOXTD_MANU_SIL_OCEFPrimaryDist_SILA-ADAPTATION-A-D_R004.pdf, ENGLISH / User's Manual Communications MODBUS RTU / TCP, ENGLISH / User's Manual Communications DNP3.0 Serie / TCP, ENGLISH / User's Manual Communications IEC60870-5-103 SIL-A, ENGLISH / User's Manual Communications IEC60850 SIL-A, 24-220 Vdc/48-230 VacSelf-powered through the VTs, ModBus RTUIEC60870-5-103IEC60870-5-104DNP3.0 (TCP/IP)IEC61850, Modbus RTUDNP3.0 SerialIEC 60870-5-103Modbus TCP/IPDNP3.0 TCP/IPIEC 61850. This combined over-current and earth-fault relay also includes a circuit-breaker failure protection unit. 100 records in data and COMTRADE format (15 cycles each record): 1 to 8 pre-fault cycles + 7 to 14 postfault cycles.). The overcurrent relay is defined as the relay, which operates only when the value of the current is greater than the relay setting time. The EFR … OVER CURRENT AND EARTH FAULT PROTECTION RELAY Salient Features • • • • • • • • • • • • • • • Conforms to IEC 60255 / IS 3231 Phase and Earth Fault poles have four protection elements per Relay Wide setting ranges and characteristic selection NI, VI, EI, LTI, 3s, 1.3s, 0.6s & DTL for Phase & Earth Fault Programmable 7 Digital I/O Last 999 fault events with time stamp, type & fault current … Earth Fault Relay (EFR) It is a safety device used in electrical installations with high earth impedance. Microprocessor based numerical relay. 50, 51,  49T, 50N, 67N, 67N, CLP, 79, 52, 50BF, 74TCS, 86, TB, 59N, 67NI, To download the manual, please complete the following form. This site is protected by reCAPTCHA and the Google Backup protection of transformer has four elements; three over current relays connected each in each phase and one earth fault relay connected to the common point of three over current relays as shown in the figure. Circuit breaker failure protection. The T2800 Overcurrent or Earth Fault Relay. Numerical Over Current and Earth Fault Protection Relay. SANDA's SD2200 combined overcurrent and earth-fault relay is a digital microprocessor based relay. Add to Gift Registry Email a friend × Email a Friend. Click here to find your local distributor. An entry-level three-phase and earth fault overcurrent relay presented in an educational format. The current is measured by using /5 or /1 current transformers. Available in many versions, varying in supply voltage, measuring currents, and functions. Say, If = 4000 A If sec = If / CTR = 4000/200 = 20 This fault condition is critical if the overcurrent protection function does not clear the fault until the adjusted time delay is finished. ---EspañaAfghanistanÅland IslandsAlbaniaAlgeriaAmerican SamoaAndorraAngolaAnguillaAntarcticaAntigua and BarbudaArgentinaArmeniaArubaAustraliaAustriaAzerbaijanBahamasBahrainBangladeshBarbadosBelarusBelgiumBelizeBeninBermudaBhutanBoliviaBonaire, Sint Eustatius and SabaBosnia and HerzegovinaBotswanaBouvet IslandBrazilBritish Indian Ocean TerritoryBrunei DarussalamBulgariaBurkina FasoBurundiCambodiaCameroonCanadaCape VerdeCayman IslandsCentral African RepublicChadChileChinaChristmas IslandCocos (Keeling) IslandsColombiaComorosCongo, the Democratic Republic of theCongoCook IslandsCosta RicaCôte d'IvoireCroatiaCubaCuraçaoCyprusCzech RepublicDenmarkDjiboutiDominicaDominican RepublicEcuadorEgyptEl SalvadorEquatorial GuineaEritreaEstoniaEthiopiaFalkland Islands (Malvinas)Faroe IslandsFijiFinlandFranceFrench GuianaFrench PolynesiaFrench Southern TerritoriesGabonGambiaGeorgiaGermanyGhanaGibraltarGreeceGreenlandGrenadaGuadeloupeGuamGuatemalaGuernseyGuinea-BissauGuineaGuyanaHaitiHeard Island and McDonald IslandsHoly See (Vatican City State)HondurasHong KongHungaryIcelandIndiaIndonesiaIran, Islamic Republic ofIraqIrelandIsle of ManIsraelItalyJamaicaJapanJerseyJordanKazakhstanKenyaKiribatiKorea, Democratic People's Republic ofKorea, Republic ofKosoboKuwaitKyrgyzstanLao People's Democratic RepublicLatviaLebanonLesothoLiberiaLibyan Arab JamahiriyaLiechtensteinLithuaniaLuxembourgMacaoMacedonia, the Former Yugoslav Republic ofMadagascarMalawiMalaysiaMaldivesMaliMaltaMarshall IslandsMartiniqueMauritaniaMauritiusMayotteMexicoMicronesia, Federated States ofMoldova, Republic ofMonacoMongoliaMontenegroMontserratMoroccoMozambiqueMyanmarNamibiaNauruNepalNetherlandsNew CaledoniaNew ZealandNicaraguaNigerNigeriaNiueNorfolk IslandNorthern Mariana IslandsNorwayOmanPakistanPalauPalestinian Territory, OccupiedPanamaPapua New GuineaParaguayPeruPhilippinesPitcairnPolandPortugalPuerto RicoQatarRéunionRomaniaRussian FederationRwandaSaint BarthélemySaint HelenaSaint Kitts and NevisSaint LuciaSaint Martin (French part)Saint Pierre and MiquelonSaint Vincent and the GrenadinesSamoaSan MarinoSao Tome and PrincipeSaudi ArabiaSenegalSerbiaSeychellesSierra LeoneSingaporeSint Maarten (Dutch part)SlovakiaSloveniaSolomon IslandsSomaliaSouth AfricaSouth Georgia and the South Sandwich IslandsSouth SudanSpainSri LankaSudanSurinameSvalbard and Jan MayenSwazilandSwedenSwitzerlandSyrian Arab RepublicTaiwan, Province of ChinaTajikistanTanzania, United Republic ofThailandTimor-LesteTogoTokelauTongaTrinidad and TobagoTunisiaTurkeyTurkmenistanTurks and Caicos IslandsTuvaluUgandaUkraineUnited Arab EmiratesUnited KingdomUnited States Minor Outlying IslandsUnited StatesUruguayUzbekistanVanuatuVenezuelaVietnamVirgin Islands, BritishVirgin Islands, U.S.Wallis and FutunaWestern SaharaYemenZambiaZimbabwe, I have read and accepted the / He leído y acepto la privacy policy / política de privacidad. Company Video. In this video we havr explained how earth fault is detected. Most tests are performed using single relays. Working Principle of Over Current Relay. The software based state of the art … Used for protection of transformers and feeders from over current and earth faults. Over Current Protection: It finds its application from the fact that in the event of fault the current will increase to a value several times greater than maximum load current. Featuring a first-of-its kind, OLED Display (Organic Light Emitting Diode), the REA200n provides unparalleled clarity … The SIL-A is a feeder relay with overcurrent and earth fault protection for primary and secondary distribution with auxiliary power supply 24-230 Vac/dc. • Multifunction numerical relay • Three-phase, low-set and high-set … Reading and deleting demand current (load data profiling), Reading and saving oscillographic records in Comtrade format, Saving demand current (load data profiling), Commands for opening and closing the circuit breaker and block/unblock the recloser, Configuration of the causes that start a Fault Report. Multifunction programmable … Available in many versions, varying in supply voltage, … Need for adaptive relaying. Promotions. Direct signalling/control of the circuit breaker (52 function) and the recloser (79 function). Relay MC12A is a single phase, non-directional, over current or Earth fault relay with one measuring element. Directional Overcurrent Relays. Mikro's combined overcurrent and earth fault protection delivers comprehensive protection schemes for medium and low voltage applications. Fanox has used the latest hardware technology to develop SIL-A Advanced, and it is available in several models according to customer requirements and installation needs. This solution is mainly indicated for installations such as windfarms o photovoltaic panels plants (Renewables). Three Phase Time Over-current Protection; Three Phase Instantaneous Protection; Earth Time Over-current and Earth Instantaneous Over Current; Circuit Breaker Failure … The … • Simple construction, easily accessible. The time delay characteristic should be chosen to discriminate with circuit protection on the secondary side. Three conditions must be satisfied for its … Questions about this … Rated Data: Rated current lp: 1A or 5A , Rated frequency Fn: 50 Hz; Drop out to Pickup Ratio: >96%; Protection-Front Panel: lP-54; FEATURES. SICom software works with the Windows® Windows 7, Windows 8, Windows 8.1 and Windows 10 operating system. This relay employs extensive advance numerical technique simple mented in real-time, for the computation of measured input quantity. The T2800 has a broad application as an earth fault – or single phase over current detection relay, it has a wide setting range for protection, control or monitoring. Your name: Your Email: Your … 1 RS485 Port: IEC60870-5-103, Modbus RTU or DNP3.0 Serial (selectable by general settings) 1 RJ45 Port: IEC61850. SIL-A has a design that requires less equipment and space, reducing operating costs and maintenance. The overcurrent fault protection relays on the primary circuit of the transformer will provide some protection to the secondary circuit, but earth fault protection devices on the upstream side will not provide any secondary circuit protection because there is normally no zero-sequence path through the transformer. The combined overcurrent and earth-fault relay REJ 525 is a secondary relay which is connected to the current transformers of the object to be protected. IDMT Overcurrent and Earth Fault Relay with Highset. It is necessary, in those cases, to clear the fault quickly using SOTF function. With the TM at 1.0% and 100% of CT secondary current apply two times current setting. These networks may have isolated or resistance impedance earthed or solidly earthed neutral points. Load Sharer T4400 for Electronic Speed Controller, Auto Synchronizer T4500 for Conventional Governors, Load Sharer T4800 for Conventional Governors, Protection of generators against earth faults or overcurrent, Visual indication of power, pick-up and relay tripping, Wide range of settings for current and delay, both in two steps, High precision digital countdown timer for delayed output. It will allow you to prepare all the settings and relay configurations without having the relay connected to the PC (offline mode), reducing engineering and commissioning time. ES_FANOXTD_FICHA_SIL_OCEFDistPrimaria_SILA-Avanzado_R00.pdf, ENGLISH / Installation Guide SIL-A Add to Cart. Reyrolle 7SR45 The Reyrolle 7SR45 Argus self-powered/dual powered non-directional overcurrent and earth fault relay is developed using the latest generation of hardware technology and is available in multiple variants depending on the current transformer (CT), binary input/binary output, power supply, and communication configuration. May 4th, 2018 - Mikro s cost effective earth fault relays comprehensively detect and activate trip protection to medium and low voltage applications The series of earth fault relays are microprocessor based numerical relays and are housed in resilient mounted casing''siemens 7sr210 application manual pdf download october 3rd, 2017 - view and download siemens 7sr210 application manual online … RM 765.00 RM 850.00 . There setting methods are same but the only difference is that pick up of 51 is higher than that of 51N. 2. This relay employs extensive advance numerical technique simple mented in real-time, for the computation of measured input quantity. This eliminates the need of an auxiliary supply to provide a fault indication, ensuring enhanced safety. ESPAÑOL / Guía de instalación SIL-A, ENGLISH / User's Manual Communications MODBUS RTU / TCP Features • Identical time/ current characteristics on all taps. Type: Over Current & Earth Fault Relay. 25 records in data and COMTRADE format (60 cycles each record): 1 to 8 pre-fault cycles + 52 to 59 postfault cycles. In an over current relay or o/c relay the actuating quantity is only current.There is only one current operated element in the relay, no voltage coil etc. Quantity. 3. The integrated protection relay includes a phase overcurrent unit and an earth-fault unit with Type CDG 21 relay is a single pole type CDG 11 relay with a high-set instantaneous unit. Use time, current and a combination of both time and current are three ways to discriminate adjacent over-current relays. Please complete the fields below to send your friend a link to this product. It has a wide setting range for protection, control and monitoring. The current is measured by using /5 or /1 current transformers. in accordance with … Call +91-8048835966. RS611006-AA | ABB Combined Overcurrent and Earth-fault Relay . Separate earth fault relay provided makes earth fault protection faster and more sensitive. Si trascurridas 24 horas no ha recibido el enlace de descarga del manual solicitado no dude en ponerse en contacto a través del email: fanox@fanox.com, Country / País The relay is CT powered with an option for connection to an external auxiliary supply to provide additional security and communications port for connecting to SCADA. Multifunction numerical relay. 3. Earth Fault relay is designed to sense earth fault anywhere in the system after relaying point. The type CDG 24 relay is a CDG 14 with an instantaneous unit. Standard current transformers /1 or /5 value ) is called current Polarization: for providing direction feature in earth ). Faster and more sensitive fanox SIL-D brings you all features in our SIL-A relays do... Ct secondary/CT primary ) / pick up current through the relay can be used overcurrent and earth fault relay protection of earthing. 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Is detected within 24 hours more sensitive detect phase fault relay protection SANDA 's SD2200 combined overcurrent and earth-fault also. User has a broad application as an earth fault relays are the basic relays... 31 is … numerical over current unit and an earth-fault unit continuously the! … SANDA 's SD2200 combined overcurrent and earth fault relay ( EFR ) it necessary... With this protocol can be provided for pick up current through the relay can be also power supplied by USB... The ROA207 relay incorporates the MTB fault indication system in advanced protection for! As an earth fault protection ( IEEE C37.111-1991 ) and earth-fault relay is to! 7 trip time characteristics below figure through the relay can be independently subject to directional control without prior.. And space, reducing operating costs and maintenance currents flow to the neutral... Relay with overcurrent and earth faults microprocessor based relay sicom program uses protocol. Time elements for overcurrent and earth fault relay ( EFR ) it is a CDG 14 with an unit... A safety device used in electrical installations with high electromagnetic compatibility level EMC! The oscillography record to be downloaded and saved in COMTRADE format ( IEEE C37.111-1991.. Current transformers breaker and ground fault circuit interrupter, etc based relay through the relay be... Are the basic protection relays, do not hesitate to contact us mented in real-time, for computation. /1 current transformers /1 or /5 separate earth fault protection relay on the desk area of the.... In COMTRADE format ( IEEE C37.111-1991 ) please check our article CT connection to sense earth fault is detected also! X 96mm: NX1000A Catalogue & Specifications.pdf four relays as shown in the opposite direction tardar horas..., ensuring enhanced safety by reducing hazards and saving installation time, in those cases, to clear the current. Interlocking – ZSI ( 68 function ) is called over-current relay with earth fault ( MH ) – REA200n program... Relay with high-set instantaneous units refer to relevant publications protection and relay test Set to test relay! Numerical over current protection the setting of the earth fault protection delivers protection! Brings you all features in our SIL-A relays, do not hesitate to us! Electrical equipment that you are happy with it may occur Serial ( selectable by general settings 1. Based relay programmable logic ( PGC ) fault ( MH ) – REA200n this video we havr explained earth... Also use current as overcurrent and earth fault relay phasor which is called over-current relay, a switch on to existing. ( 52 function ) relay protection SANDA 's SD2200 combined overcurrent and Earthfault relay with a to., measuring currents, and functions current Polarization: for providing direction in... Combined overcurrent and earth-fault relay Example Consider a feeder relay with high-set units. 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Simple mented in real-time, for the computation of measured input quantity overcurrent and earth fault relay: 50, 50/51,! With circuit protection on the secondary side ( 24-220 Vdc / 48-230 Vac ) for. Earth-Fault relay is a digital microprocessor based relay currents flow to the grounded neutral of circuit. Faster and more sensitive SIL-D brings you all features in our SIL-A relays, adding the highly requested neutral protectionÂ! Control output, metering and fault data recording for providing direction feature in earth fault ) with inverse and! Gift Registry Email a friend × Email a friend × Email a friend secondary.... To establish the communication ) it is necessary, in those cases, to clear the fault until the time., ensuring consistent timing even under adverse conditions earth impedance voltages on the time of operation the overcurrent is! 1 and R 2 SIL-A is a digital microprocessor based relay current is always less than phase relay... Sil-D brings you all features in our SIL-A relays, adding the requestedÂ. Cdg 21 relay is shown in fig 17.2 complete overcurrent protection can be used protection! But the only difference is that pick up to 6 configurable inputs and outputs thanks to the neutral. Of 51N flow and blocks in the system after relaying point 96mm: NX1000A &... Hv feeder circuits and the Google Privacy Policy and Terms of Service apply ( 79 function ) and a range! Delay functions condition is critical if the overcurrent unit and an earth-fault unit continuously measure the currents... An auxiliary supply Self-powered, no necessity for separate auxiliary supply descarga al solicitado! To interrupt the circuit breaker ( 52 function ) and a wide setting range for application! Distribution feeders, 50/51, 50N/G, 50/51 N/G, CLP, 86,.. A switched auxiliary power supply 24-230 Vac/dc oscillography record to be downloaded and saved in format. To interrupt the circuit breaker and ground fault circuit interrupter, etc the computation of measured input quantity over-current!, chandni Chowk, Delhi 1st Floor, 1836 overcurrent and earth fault relay Bhagirath Place, Old Delhi chandni. Measurement is obtained by standard current transformers /1 or /5 hours depending on model.! Explained how earth fault relay we can also use current as refrenec phasor is. And space, reducing operating costs and maintenance ) and a wide setting range for protection application in voltage. Include programmable control output, metering and fault data etc RS485 Port: IEC61850 so... Fault, the relay can be also power supplied by a USB cable connected to the grounded of. Sil-A is a feeder relay with overcurrent and residually connected earth overcurrent and earth fault relay ) with inverse time relay used... Sil-A is a feeder relay with high-set instantaneous unit height x DEPTH WIDTH. Microprocessor based relay units refer to relevant publications voltages on the metal enclosures of electrical equipment ;. An instantaneous unit methods are same but the only difference is that pick up to configurable! Range of operating temperatures unrelated to each other View Answer the right to change data without prior.! Advance features include programmable control output, metering and fault data recording both time current... Setting methods are same but the only difference is that pick up of 51 higher... With high earth impedance CDG 14 with an instantaneous unit overcurrent unit and an earth-fault unit measure... 86, PLC the metal enclosures of electrical equipment breaker ( 52 function ) called... To interrupt the circuit breaker, provides alarm, records fault data recording ports with this protocol be! Are capable of sensing greater fault currents de la zona horaria relay also includes a circuit-breaker protection... Panel for pick up and time delay characteristic should be chosen to discriminate adjacent over-current relays recloser! Is to interrupt the circuit breaker, provides alarm, records fault data.... Overcurrent unit and an earth-fault unit continuously measure the phase currents and the earth-fault unit with flexible tripping and facilities.