Protective relay testing may be divided into three categories. The under over frequency relay is sensitive to both underfrequency and overfrequency conditions. Abstracttesting is the last line of defense for relay system performance before the switch is thrown. Are preapproved for the number of neta continuing education credits ctds listed in each relay testing training class description below. It addresses basic testing terminology as well as various tests including factory production, type tests, commissioning and maintenance tests. Relay testing ieee conferences, publications, and resources. Protective relay testing software from doble f6test. In order to ensure reliable operation, protective relays as well as recloser controls must be tested. In order to avoid damage to the generator under the above two conditions, frequency relays are used. Frequency setpoint and hysteresis adjustments are provided for underfrequency and overfrequency, along with two independent sets of contacts. Dffdigital frequency relay protection and control frequency functions under normal conditions, the generated frequency of the power system must match with the load requirements. Protection suite is the software interface of doble f6150 power system simulators and accessory equipment.
Dobles f6test protective relay testing software is a visuallyrobust software for simple, fast, and automated testing, including the testing of complete protection schemes. It allows users to test our different relay tester. Timesaving test automation for standard test procedures is also a must for meeting the deadlines of a time sensitive environment. Block diagram for implementing over under frequency relay a. It actuates when the frequency decreases to 55 hertz for 60hertz operation and 46 hertz for 50hertz operation. Day 1 f6150 hardware features description of hardware handson use of the test set ratings communications doble testing software protection suite introduction of protection suite file structure of protection suite communicating with f6150 test set manual testing using control continued. Relay offers an integrated suite of products including backoffice software and etrading platform for motor, home, commercial vehicle, lifeinvestment, and commercial lines panels. Basic, protection and advanced, which provides incomparable benefits for users. Under frequency negative sequence relay my tech info. Protection relay testing procedures doble protection suite. Relay protection testingfor ge, sel, nari, sifang, siemens, abb etc. Time overunderfrequency rxfk 2h and relay with protection. This application and testing electromechanical and microprocessor relays basics dp 005 course covers the testing of simple overcurrent relays such as time overcurrent, underovervoltage and overunder frequency electromechanical relays.
Protective relay and protection system commissioning omicron. Whether you need solutions for analog or digital applications, protection suite provides a comprehensive test environment that is flexible to accommodate your technical and operational requirements. We provide yearround training on our products and general relaying principles. Relay products are the market standard in ireland, and the company serves more than 400 customers with over 3,000 insurance professional users in the irish market. Frequency measuring unit fmu and under over frequency detection element fde, as shown in fig. Facilities instructions, standards, and techniques volume 38 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. Creating new test plans for testing instantaneous overcurrent, timeovercurrent, over and under voltage, over and under frequency, and step distance functions is as simple as plugging your relay settings into the test plan builder and pressing next. Power test is the software that includes all our relay testers. In electrical engineering, a protective relay is a relay device designed to trip a circuit breaker when a fault is detected 4 the first protective relays were electromagnetic devices, relying on coils operating on moving parts to provide detection of abnormal operating conditions such as overcurrent, overvoltage, reverse power flow, over frequency, and under frequency. Ramprelay protection testingfor under frequency relay. In addition, with the open communication architecture, the unit can also be used with thirdparty software programs such as national instruments labview.
Meggers advanced relay testing software is designed to make the complex task of relay testing simpler. Easily collect and disclose nerc prc005 compliance data. F6test tests multifunction relays with inservice settings without the need to. A software application is presented in this thesis that was designed to provide the. Each of these packages contains different tests for different users needs. If the changes are small the frequency can be corrected through the normal adjustment of the. Protection systems play a key role for the safe and reliable operation of todays electricity power systems. Underfrequency relays should be considered for applications where the detection of underspeed conditions for synchronous motors and condensers is required. The availability of equipment is essential for adhering to these time schedules. In a normal industrial application, periodic testing should be done at least every 2 years in accordance with nfpa 70b 2016. Comparing protectiverelaying commissioning and test.
Commissioning engineers often work under difficult time constraints. In general, higher requirements are imposed on accuracy of setting and measuring capabilities in loadshedding and load restoration. For instance, in an ac power plant, it can be used to protect a generator against underspeed andor overspeed, because frequency is proportional to speed. Most automated testing software also has the ability to prevent relay testers from manipulating the results. Frequency relay product guide spaf 140 c 1mrs750418mbg 4 application the frequency relay spaf 140 c is designed to be used for the protection of power generators and other ac equipment against overfre quency and underfrequency. Jun 02, 2017 relay protection testingfor ge, sel, nari, sifang, siemens, abb etc. Load shedding actions of both methods are simulated and compared in a test system in etap software to comprehend frequency response of an industrial. All our power test versions are compatible with microsoft windows 7, microsoft windows xp, microsoft windows vista. The enoserv rts backupmerge utility is a high speed. Modeling and simulation of digital frequency relay for. Relay testing spans from the couple of points test in a singlephase overcurrent. The same software also runs on the stvi, smart touch view interface handheld controller for the smrt family of units. Omicron cmc 256 relay test set to provide input signals to a ge multilin d90plus distance.
Operation, maintenance, and field test procedures for. Enoserv rts software effectively test relays and then produce documentation of the testing event according to the parameters of your maintenance and testing program. Four elements for over or under frequency protection. Protection relay testing procedures doble protection. The frequency of the relay testing will change depending on the type of relay. This online engineering pdh course presents information on protection relay testing and commissioning. The testing may be complex, even where only a simple relay function is being assessed. Since type testing of a digital or numerical relay involves testing of software as well as hardware, the type testing process is very complicated and more involved than a static or electromechanical relay.
Handson relay testing training classes from valence. Dobles f6test protective relay testing software is for simple, fast, and automated. Enhanced includes tests for synchronizer, under over, and dfdt rocof frequency relay pickup and timing tests, ieeeiec comtrade transient waveform. 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 2. Under frequency relay thus aids load shedding programme to save the grid. Rate of change of frequency rocof, directional power, intertie, and intertripping functions. Having a reliable and accurate database of tests requires a lot of frontend effort, standardization, thorough understanding of protection testing, and knowledge on how to manipulate the automated testing software.
Omicron cmc 256 relay test set to provide input signals to a ge multilin d90 plus distance. Intuitive colour screen graphics with a vast library of digital and electromechanical relay routines from relay manufactures across the world. Compatibility is a very important design principle. Protection relay testing and commissioning pdh courses online. Rtms is a microsoft windows xp service pack 3vista7810 compatible software program designed to manage all aspects of protective relay testing using the megger smrt family of units. Which of the procedures described below are added to your test plan will depend on the specific. The testing and verification of protection devices and arrangements introduces a number of issues. This methodology supplements conventional relay acceptance tests by adding tests that simulate actual conditions on the grid. A comparison of under frequency relay based and frequency.
Design the frequency relay spaf 140 c is a secondary relay, which is connected to the voltage transformers of the network section to be pro tected. Software framework for protection relay testing utc scholar. Rtms, relay test management software, is the culmination of over 35 years of automatic relay testing experience. Electromechanical and microprocessor relays basics. The course will start with basic level instruction on the construction and continued. This report is to clarify the basic difference between the obsolete kd4 kd41 electromechanical relay and the present design kd10 kd11 compensator distance relays. Properly working protection devices help to maintain the safety of the system and to safeguard assets from damage. Frequency relays are also used where detection of high or low frequency indicates system abnormalities, such as faults in speed regulation units or system overload. The device has up to three electromechanical relay outputs which may be used to trip power circuit breakers. A comparison of line relay system testing methods chris araujo, national grid co. Protection relay testing for commissioning swp check this is the latest process zone version before use.
The sfr 259 frequency relay is a second generation relay designed to provide reliable load shedding during abnormal frequency conditions. Labvolt series by festo didactic underover frequency relay. For settings set1 or set 2 the parameter set is activated by software. Enoserv software and services makes workers faster, enabling you to meet testing deadlines in less time. This paper presents a new methodology for under frequency load shedding relay testing. F6test has an intuitive user interface and features graphical protectiontest modules. They are typically completed under controlled environmental conditions. The mrf3 has 5 output relays with changeover contacts. The dff is applied directly to a generator to protect against those abnormal conditions that result in frequency fluctuations, and throughout the system to shed. Fred horvath, fpl seabrook station jim mack, schweitzer engineering laboratories, inc. The software version provided with the latest cmc, can also be. Protective relay and protection system commissioning. 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. Under frequency relay trips the feeder on load at set value of frequency, so as to give relief to the generator, thereby saving the unit.
When abnormal conditions occur there are changes in the system frequency. And once each relay testing training class comes to a close, all of our graduates receive a certificate of completion, which can be used with your regulating board. Dec 27, 2010 to operate a cmc via a pc, a comprehensive suite of software tools is provided. The functional tests consist of using the adequate inputs to the protection relay under test and measuring the performance to discover if it meets the specification. An advanced methodology for under frequency load shedding relay testing. Fmu is used to measure the digital value of frequency from the pt while fde takes appropriate action based on over under frequency limit.
1161 365 1195 1647 238 299 1397 52 1491 1185 941 1340 363 1418 1572 1630 1425 1587 354 286 1346 1117 1630 1203 952 1190 1654 487 1235 1113 1452 1113 748 1457 1046 131 373 500 1058 1447 1014 725 162