This information is often furnished on a time–current curve of the coordination study displaying the characteristics of the relay. CONTRACT NUMBER 5b. But it is much, much more! Procedures for performing insulation-resistance tests on solid-state and microprocessor relays should be determined from the relay instruction manual. The type of the relay to be tested determines the type of equipment used to provide the secondary injection currents and voltages. DEWA TEST PROCEDURE. Photo: TestGuy. AUTHOR(S) Paul Price, Nate Myers, Jim DeHaan Bureau of Reclamation Hydropower Technical Services Group Denver, Colorado 5d. A fuel pump relay functions primarily to maintain a consistent voltage supply to the fuel pump. Check the voltage source. Step 1 - To test for intermitted relay failures which are common, remove the relay in question, take a small wire strand, about two inches long and insert it into the relay connector terminal 87 or 30. See also: relay. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. GE Type IAV54E Undervoltage Relay. Metering on protective relays and meters should be checked against a calibrated source, verify that communication lines are operational for local and remote devices and that control annunciation systems are left with no alarms. Thus, procedures and records should be designed with preventive maintenance as the guide. Otherwise, the relay is not receiving voltage. Use your fingers to unplug the relay from the socket in which it is placed. Differential test For the Differential test, 2 relays should be connected by direct Fiber optic cable and then ‘Internal loop back in not required. If you continue browsing the site, you agree to the use of cookies on this website. The relay will help prolong the life of switches by preventing the flow of high amperage electricity. Computer Aided Relay Testing Instead of testing a relay function manually a computer program is used to test the same. Photo: TestGuy. It includes everything I’ve learned about relay testing since The Relay Testing Handbook: Principles and Practice, including step-by-step dynamic testing procedures that can be applied to any relay element with fixed-time delays. GRANT NUMBER 5c. Electrical type tests 21.2 commissioning tests iv. SEL451 - Capacitor Bank Protection. 1. The terms open and closed circuits are used in the relay to signify whether there is a current flow or not. Microprocessor relays are computer-based systems that utilize software-based protection algorithms for the detection of electrical faults. The relay should not be tested while it is connected to the circuit. This course is intended for relay technicians or protection engineers and system consultants with an interest in relay testing. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Some relay manufacturers may not recommend high voltage insulation tests. Inside the relay is an electromagnet that opens and closes depending on the current passing through. MiCOM P546 - Disatance & Line Differential. • 2 1 • R e l a y T e s t i n g Many relay test plans start by re-configuring a digital relay to make it operate like an electro-mechanical relay, and then apply electro-mechanical relay test procedures to record a pickup and timing results. TASK NUMBER 5f. Verify relay. Before you can start testing your relay with a multimeter you need to first have a basic understanding of how relays work. Verify operation of all light-emitting diode indicators and set the contrast for liquid-crystal display readouts. The procedure of Checking the Coil’s Resistance of a relay with a Multimeter: To check the coil’s resistance with a multimeter, take a multimeter and put it on the ohmmeter setting then connect the multimeter probes on any two terminals of relay’s coil. The tests themselves will reveal catastrophic failures Select E87L – Number of Terminals as 2. For electromechanical and solid state relays, determine pickup and dropout of electromechanical targets. In a normal industrial application, periodic testing should be done at least every 2 years in accordance with NFPA 70B 2016. If the light glows, there is incoming voltage. Using a Digital Multimeter to Test the Fuel Pump Relay. However, an operation of the relays contacts will trigger the intended reaction, such as to trip the associated circuit breaker. ; If the multimeter does not beep, the coil is open & damaged.The relay needs to be replaced. Protection Testing Procedures: RED670 - Disatance & Line Differential. Dynamic validation type testing 21.7 There are many reasons why the testers have drifted from manual testing to automated, such as • Many modern microprocessor relays … Probe the wire or wires feeding voltage to the relay with the test light following the same procedure used on the previous step. You will find the resistance of the relay coil. interfacing methods used for RTDS relay testing can be found in [4]. Electromechanical relay removed from case with components labeled. Step 2 - Next, reinstall the relay while keeping the wire strand inserted and clear of any other terminals or metal (ground). RELAY SETTINGS At all new protective relay installations, the re­ lays should be adjusted in accordance with the settings given in the relay data sheets furnished by the Denver Office, after which, tests should be made to determine if the actual operating characteristics check with the adjustments made. Protection relay self-test procedure. Digital and numerical relays will have a self-test procedure that … Verify target reset functionality, disk clearance, contact clearance and … Fuel Pump Relay - Function And Testing Procedures The fuel pump relay is activated whenever the ignition is turned on. Replace Wye PTs between Test-Set and Relay 122 K. Replace Delta-Connected PTs between Test-Set and Relay 123 L. Replace Neutral Grounding Transformer Signals between the Test-Set and Relay 124 M. Relay Outputs to Test-Set Inputs 124 N. Relay Inputs to Test-Set Outputs 126 O. Operation of protection elements for devices listed in the attached reference should be calibrated using manufacturer's recommended tolerances unless critical test points are specified by the setting engineer. n Microprocessor- Based Relay Testing, Distribution/Feeder n Microprocessor- Based Relay Testing, Generation n Advanced Visual Testing Software *This offer can only be applied to courses registered after April 17, 2018 and attended on or before November 30, 2018. It is not mandatory per NETA standards to verify operating characteristics as part of maintenance checks. TapCON260 - Automatic Voltage Control. When contact points are open then the circuit is open and when they connect the circuit is c… They come in handy for many car and home troubleshooting tasks. Secondary injection testing 21.11 And one of the best ways to do this is to use a multimeter with an ohmmeter setting and then measuring the resistance values. Refer to the datasheet to get the coil’s resistance . An expert system called RETEX (relay testing expert) has been developed as a computer aid for analysis of relay testing data. a n d C o m m i s s i o n i n g. References 21.17 Test Equipment 101: The Basics of Electrical Testing, Circuit Breaker Control Schematic Explained, Protective Relay Protection Element Tests, Capacitive Reactance - How to Solve Series and Parallel Capacitors, Protective Relay Testing and Maintenance Overview, testing may be divided into three categories, NETA ATS-2017 Standard for Acceptance Testing Specifications for Electrical Power Equipment and Systems, 2017 Edition, NETA MTS-2015 Standard for Maintenance Testing Specifications for Electrical Power Equipment and Systems, 2015 Edition, NFPA 70B: Recommended Practice for Electrical Equipment Maintenance, 2016 Edition, Power Quality Analysis: Basic Theory and Applications Explained, Transformer Winding Resistance Testing Explained, Ground Fault Protection Systems: Performance Testing Basics, Electrical Power System Studies Explained, Power Cable Testing and Diagnostics Overview, Electrical Drawings and Schematics Overview, 4 Critical Tests for Evaluating HV Circuit Breaker Performance, Infrared Thermography for Electrical Distribution Systems, 10 Electrical Distribution System Arrangements Explained, Magnetron Atmospheric Condition (MAC) Testing Principles, Network Protector Basics: Applications, Operation, and Testing, Surge Arresters: Selection, Application and Testing Overview, Bearings and pivots should be clean and demonstrate, Verify that the relay is showing the correct, Check with setting engineer or owner for applicable, Verify communication assisted protection schemes via, Verify trip and close coil monitoring functions. In a car, this is likely a relay or fuse box. Concise test reports are issued for all the relays that we test and all our relay test equipment […] Perform insulation-resistance tests on each electromechanical relay circuit-to-frame and ground. MiCOM P643 - … Sharpen your skills with our collection of quizzes on electrical safety, maintenance & testing of electrical equipment and industry standards. Solid-state relays use power semiconductor devices such as thyristors and transistors, to switch currents up to around a hundred amperes. Set the multimeter in continuity test mode. The relay is typically located in a place where larger electric parts are placed. Primary injection testing 21.12 J. Software type tests 21.6 Protection scheme design for maintenance 21.16 Under normal operating conditions, microprocessor-based relay operating characteristics do not change over time. If you want to learn how to test motor relays, this is the book for you. 1 has been configured, and correctly connected to the external relay hardware to be tested, it can be compiled and run on RTDS simulator racks in either manual or automated mode. Lock-out relay and block close circuits should be tested, along with relay self-test, power supply failure, and trip coil monitor alarms back to SCADA. Scribd is the world's largest social reading and publishing site. If the relay trips then playback the case again with harmonic restraint enabled. When not otherwise specified, use manufacturer's recommended tolerances. The testing of protection equipment may be divided into four stages: i. type tests ii. We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. Tripping and alarm annunciation tests 21.14 Testing and maintenance of protective relays always begins with a thorough visual and mechanical inspection. FIST 3-8, Operation, Maintenance, and Field Test Procedures for Protective Relays and Associated Circuits 5a. When critical test points are specified, the relay should be calibrated to those points even though other test points may be out of tolerance. Details of the Testing Procedure: Connect the three-phase test set to the relay as follows: IA Test I AW1 IB Test I BW1 IC Test I CW1 Playback the case to the relay with harmonic restraint disabled. Now customize the name of a clipboard to store your clips. REB500 - Low Impedance BusBar Protection. Testing of protection scheme logic 21.13 Looks like you’ve clipped this slide to already. The correct operation of all sensing devices, alarms, and indicating devices should also be verified. See our User Agreement and Privacy Policy. 5. If you test differential function in only one relay then proceed as following. ; Place the probes of the multimeter on the coil terminals; If the multimeter beeps (or show any sign of continuity), the coil is electrically closed (good). Periodic maintenance testing – this ongoing testing ensures the protection relay is not faulty and operates as expected. Any alarms present should be investigated. A knowledge base for relay testing data analysis has been developed. System functional tests prove the correct interaction of all sensing, processing, and action devices as a complete unit. VI. The First Step Is To Test The Coil of Relay. You still can use a digital multimeter for the same purpose. Secondary injection test equipment 21.10 GE Power Management Periodic Relay Testing 1-1 GET-3473B 1 PERIODIC RELAY TESTING 1 GET-3473B 1 PERIODIC RELAY TESTING 1.1 DESCRIPTION Periodic relay testing is, first and foremost, preventive maintenance. APIdays Paris 2019 - Innovation @ scale, APIs as Digital Factories' New Machi... No public clipboards found for this slide, Facilities Engineer at Mini-Circuits Technologies (M) S/B. Example of protective relay coordination study settings characteristic curves. Search Search Many electromechanical relays have a non-linear current coil impedance when the relay operates and this can cause the test current waveform to be distorted if the injection supply voltage is fed directly to the coil. A new expert system application to power system protective relay evaluation testing, a crucial but time-consuming engineering task, is presented. Remove any foreign material from the case and ensure the cover glass is clean. When performing system functional tests, all interlock safety devices should be verified for fail-safe functions in addition to their individual design function. FACILITIES INSTRUCTIONS, STANDARDS, AND TECHNIQUES VOLUME 3-8 FIELD TEST PROCEDURE FOR PROTECTIVE RELAYS Internet Version of This Manual Created July 2000 FACILITIES ENGINEERING BRANCH DENVER OFFICE DENVER, COLORADO The Appearance of the Internet Version of This manual May Differ From the Original, but the Contents Do Not UNITED STATES … If you don't have a digital multimeter, though, buy one. The movement of the contact is generated using electromagnetic forces from a low-power input signal. Attached Reference: Protective Relay Protection Element Tests. The relay is reconfigured during the test procedure for every … such as that shown in Fig. Production testing 21.8 PROGRAM ELEMENT NUMBER 6. TESTING PROCEDURE If the circuit to be tested is in service, one relay at a time should be removed (if applicable) so as not to totally disable the protection. Photo: General Electric. Periodic maintenance tests 21.15 But, more likely you won't be testing relays that often, so probably you don't want to buy a relay tester. Operating times are affected only by the relay settings and applied signals. Protective relay testing may be divided into three categories: acceptance testing, commissioning, and maintenance testing. TST 101 provides a beginner-level introduction to testing SEL relays. You can change your ad preferences anytime. MiCOM P841 - Auto Re-Closer Relay. Environmental type tests 21.5 Upon completion of testing, control circuits and current transfer circuits should be restored to normal operation. PROJECT NUMBER 5e. As-left relay settings should match the most recent coordination and arc-flash study or engineered setting files. Relay Settings. The purpose of testing a relay is to find, whether it is good or bad . Field Test Procedure For Protective Relays 1. 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Reclamation Hydropower Technical Services Group Denver, Colorado 5d Bureau of Reclamation Hydropower Services... The case again with harmonic restraint enabled of protective relay coordination study displaying the characteristics the. Likely you wo n't be testing relays that often, so probably you do n't a! High standards of safety are observed when working in live substations utilize software-based protection algorithms for the of! In [ 4 ] read online for Free verified as functional switches preventing... Troubleshooting tasks relays always begins with a thorough visual and mechanical inspection test differential function in one... Uses cookies to improve functionality and performance, and have no physical contacts to wear out developed as a unit. Completion of testing a relay or fuse box to normal operation to around hundred! Is clean the reference guide linked below powertrain control module ( PCM ) usually the... You with relevant advertising Line differential coordination study or setting sheet supplied by the equipment owner the intended,. Recommended tolerances incoming voltage the correct interaction of all sensing, processing, and indicating devices should also be as.