Efficient testing testing of modern protection ieds. Five independent output relays selectable for in service. Protective relay testing and calibration protective relays are decisionmaking elements in the protection scheme for electrical power systems. Protective relay testing using a modern digital real time. All in one intelligent relay testing kit kf920 relay tester kit channels k3163i relay testing kit complied iec6185091, iec6185092 iec6004478 k3166i relay testing kit secondary injection relay test set iec61850. For this reason it is very helpful to have a versatile test set, which also has the ability to record and analyze transient signals. The most significant feature of the relay testing system pom2 is the optional internal pc control with 10. The thesis will briefly describe the synchronous generator, the used test functions and the calculations.
The thesis will also describe the test equipment such as omicron, vamp and abb reg670. Students connect the relays to the test circuits on the front of the test set. The relay test system is easy to use and quick in process with the help of local control and ready test modules. Negative sequence overcurrent relay and protection assemblies rxiik 4 and raiik 400 nite time 0100 seconds.
Commissioning tests of protection relays at site before set to work photo credit. Assuming the relay which is responsible is known further information is needed to be evaluated 1. A relay which protects the electrical system from negative sequence component is called a negative sequence relay or unbalance phase relay. The rugged hardware design is built for field use over a wide temperature range, with the possibilities of intelligent software to perform rapid testing. A multicore cable connects from the back of the test set to the back of each relay to give it a supply current for correct operation. The result of the tests is a report which indicates if the relay is working properly. The negative sequence relay protects the generator and motor from the unbalanced load. Commissioning tools compliant for iec 61850 environments, high burden electromechanical relays, gps and irigb can be completed by allinone test sets. Operation, maintenance, and field test procedures for protective relays and associated circuits iii acronyms and abbreviations a ampere ac alternating current amp ampere ansi american national standards institute bes bulk electric system carma capital asset and resource management application ccvt coupling capacitor voltage transformers co. Thermal memory for block and trip function with the settable cooling time up to 200 minutes. Protection relay testing for commissioning swp check this is the latest process zone version before use. The relay values must match the applied input current within tolerance. Directional non directional overcurrent protection. This swp is to be used in conjunction with current zone.
Troubleshooting and lessons learned using protective relay event analysis ge digital energy multilin. For the ease of referral, in the remainder of this paper, the word relay refers to microprocessorbased relays. Appendix r protective relay requirements and approvals. Operation and maintenance of protective relays and.
Protective relays are designed to provide protection for electrical equipment in small and large medium voltage distribution systems. It is a great innovative breakthrough of ponovo for its incomparable lightest solution 8. Field test procedure for protective relays csanyigroup. Properly working protection devices help to maintain the safety of the system and to safeguard assets from damage. The be159n ground fault overvoltage relay monitors the fundamental frequency 50 or 60 hz voltage which accompanies a ground fault, and is insensitive to the third harmonic voltage present during normal operation. Every facet of relay testing can be handled with the comprehensive line of relay test equipment from megger. The impact of such errors may range from simply being a nuisance tripping occurs repeatedly on energisation, requiring investigation to locate and correct the errors through to failure to trip under fault conditions, leading to major equipment. Due to the long life spans of protection relays, engineers are often required to test relays of all generations, from older electromechanical designs to the latest ieds. Most protective are very complex and require a trained protection engineer to determine. Operation, maintenance, and field test procedures for. He holds bsee and msee degrees from iowa state university with an emphasis in power systems and control systems. Special test that are peculiar to the specific type of relay such as through fault, reach, dropout, etc. New developments in directional polarization have improved the directional security and performance of the relay even further 6, 9. If not available on the project, most of the equipment necessary can be borrowed from the denver office for making relay tests 5.
Simply testing all elements in the relay may not improve the reliability of the pcm system. A relay is a switching device as it works to isolate or change the state of an electric circuit from one state to another. As power grids get bigger and carry more power, the need for quick, reliable disconnection when faults occur becomes more urgent. To learn more about protective relay testing, please visit our protective relay testing website. Over this value the directional relay uses standard polarisation the measured voltage, under this. Whether you need solutions for analog or digital applications, protection suite provides a comprehensive test environment that is flexible to accommodate your. Furthermore automation can even increase the depth of testing in a shorter time, raising not only the efficiency but also the quality.
Cts having the same ratio are installed in all the connections to the. Protective relay testing may be divided into three categories. Protection suite is the software interface of doble f6150 power system simulators and accessory equipment. Pdf testing protection relays based on iec 61850 in. L336i l336i is a portable protection relay test set. Relay technician duties under general supervision, to install, test and maintain the most complicated types of relays when used in connection with the most involved control systems and equipment arrangements at major stations on the bulk power system. Several manufacturers now produce portable relay test sets that will provided excellent results.
The relay testing handbooks are a series of books that have been written from the relay testers perspective to concentrate on the principles and practical questions that every relay tester should be familiar with. At last, the application of testing system is introduced. Access to this test probe is through four standard size banana jacks on its rear face. Well be looking at directional overcurrent relays from a testing perspective in this post. The reason for the discrepancy will not be a change in the relay characteristic but a change in the test conditions, for example, the relays proximity to a steel cabinet.
You can now purchase the relay testing handbook pdf copies of any book in the relay testing handbook series at our online store. For this reason there is a need for annual testing of relay protection. This article describes testing of modern relays and the impact of iec 61850 on protection testing in a practical manner. Field test procedure for protective relays, november 1991. F6test makes testing impedance, differential, voltage, current, and frequency relays simpler than ever before. The multiple protection function of todays protection relay systems requires a new level of sophisticated test hardware and software to completely analyse the operation of the unit in a real life situation. Protective relaying philosophy and design guidelines pjm relay subcommittee july 12, 2018. Relay selftest diagnostics are capable of detecting approximately 85% of component failures. With the current applied verify zero current in the relay on ia, ib, ic, i2 and 3i0. Doble f6test relay testing software f6test gives you automatic control of f6 instruments from a standard pc. Page 3 of 15 standard work practice sp0518 ver 2 ergon energy corporation limited abn 50 087 646 062 ergon energy queensland pty ltd abn 11 121 177 802 return the relay scheme to service in an acceptable standard. It is an electrical device designed to initiate the isolation of a part of the electrical installation, or to operate an alarm signal, in the event of abnormal condition or a fault. Negative sequence overcurrent relay and protection. They monitor circuit conditions and initiate protective action when an undesired condition is detected.
Testing considerations for line current differential schemes. Testing methodology the institute has successfully restored the tradition of relay protection testing in 2010, 2011 and 2012 in more than 30 facilities. Iaictliac 60 field relay power system device function. The paper assessing the effectiveness of selftests and other monitoring means in protective relays shows a strategy for relay testing 3. Protective relay testing using a modern digital real time simulator g. Verify 50n and 51n element ranges by testing pickup and dropout of each element at a minimum setting, a midrange setting and. One hundred percent protection of the generator stator windings is.
Protection relay testing procedures doble protection. Breaker trip coils and other devices operated by the relay should be checked to see that proper operation is ob tained at voltages considerably below normal. Protective relay test sets switchgear, or relay testers, are ideal for testing single, 3, 4 and 6 phase protection relay systems. Relay test set manufacturer quality relay test system. A good set of testing equipment and relay tools are important. Differential protective relay is a protective relay that functions on a percentage or phase angle or other quantitative difference of two currents. To improve the educational process of the protective relay systems, powersystemrelaying laboratories were developed for testing the relay operating characteristics in references 8 910. The polarisation discrimination voltage value is 0.
Tim ernst is an electrical engineer with 33 years of utility and consulting engineering experience. Relays respond to one or more electrical quantities like voltage or current such that they open or close the contacts or circuits. S40a this model relay test equipment is designed with 3 currents 340a and 3 voltages 3300v. Testing directional overcurrent relays from valence. Volume 5motor control and protection ca0806enovember 2012. Distancelearning powersystem protection based on testing.
If a protection system is displaying unexpected behavior, you need to find its cause quickly. A ct shorting plug 018465461 is also supplied which can be used to short circuit. The most significant feature of relay testing system pom2 is the optional internal pc control with 10. The freja300 relay testing system is a computeraided relay testing and simulation system. Predicting the optimum routine test interval for protective relays. The newest relays have selfmonitoring capabilities that open new options for verifying relay performance with reduced onsite testing. Troubleshooting and lessons learned using protective relay. Dc offset, effect on induction relays, 32, 39 overreach of distance relays, 82, 350 overreach of overcurrent relays, 308 time constant, 279 dc relays, singlequantity, 22 directional, 24, 49 differential relays, 63 see also percentagedifferential relays directionalcomparison relaying, for bus protection, 277 principle of operation, 106. Besides the omicron relay testing set, the other devices of the testing system are designed. This seminar will introduce the theory and practice of endtoend relay testing. The test set includes relay support software which enables users to program the relay modules using a suitable computer. Protection systems play a key role for the safe and reliable operation of todays electricity power systems. The relay testing handbook pdf digital version is now. Included in this document are standards, practices, procedures, and advice on day.
What has been proven over and over is that a specific relay element test may not produce the desired results 1. Thus, the true purpose of preventative maintenance may be lost. A monitoring relay whose function is to limit the operation of associated protective relays to specific field protective relay a relay that functions to prevent overheating of the field excitation winding by reducing or interrupting the excitation of the shunt field. Sp0518 protection relay testing for commissioning swp pdf file. Sel recommendations on periodic maintenance testing of. The engineers toolbox for all single phase relay testing. V5t51 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 motor protection and monitoring motor protection circuit breaker overload relayc440. An examination of test switches in modern protection and. Protective relaying philosophy and design guidelines pjm. Which of the procedures described below are added to your test plan will depend on the specific project or industry specifications, to be determined by the equipment owner or system engineer. The purpose of protective relay equipment is to sense fault states and trip circuit breakers.
If a fault isnt corrected early, personal injuries and damage can occur. Using the best testing method is integral to a good testing philosophy. What should be tested are those components of the power system that are known to have failures. Differential relaying provides selectivity by providing a zone of protection with a circuit of interconnected cts.
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