Protection relay testing procedure pdf

Since type testing of a digital or numerical protection relay includes software and hardware testing, the type testing procedure is very complex and more. Page 1 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 1. Thus, procedures and records should be designed with preventive maintenance as the guide. Please check the sealability in advance under t he actual environment and. This article describes testing of modern relays and the impact of iec 61850 on protection testing in a practical manner.

Confirming relay operation and targets during normal fault clearing conditions 3. Traditional relay testing plans are laser focused on the relays protective elements like inverse time overcurrent 51 or line distance protection 21. Ip rating mentioned on the datasheet is confirmed by our company in accordance with the following test method defined in the st andard. Disclaimer the data, examples and diagrams in this manual are included solely for the concept or product description and are not to be deemed as a statement of guaranteed properties. Basic, protection and advanced, which provides incomparable benefits for users. Es586b protective relays final project protective relay testing 4 2.

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. The relay testing handbook is an indispensable resource that every relay tester should keep at their fingertips. Understanding and testing the abb red670 distanceline differential relay 10 introduction before starting the relay distance relays 87l2167n are used in line protection and cable protection schemes. 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. As the name suggests, one of the main functions provided by the relay is zdistance protection 21 or impedance protection. Section 7 of the ansineta standard for acceptance testing specifications for electrical power equipment and systems may be reproduced and used on a cut and paste basis for the particular type of equipment to be tested. The test systems of the artes product line are used to carry out functional tests on all types of protection devices, including dtidmt relays, distance protection relays and differential protection relays, to ensure that they function correctly. Phasetophase line distance protection testing 425 6. Tips and tricks to overcome common obstacles 383 chapter 15. With microprocessor relays, the builtin, self testing features can. Post mortem analysis of questionable relay operations the lack of such records for em relays has been considered as a disadvantage in using nonnumerical devices. Universal testing method for power transformer differential. Protection systems play a key role for the safe and reliable operation of todays electricity power systems.

Easy method for testing transformer differential relays. Extract existing settings from relay and compare against the settings. In addition to tests recommended for the overcurrent relay, the directional unit of the di rectional overcurrent relay should be tested for minimum pickup, angle of maximum torque, contact gap, and clutch pressure. Should evidence of overheating be found, the insulation should be checked for embrittlement and, where necessary, replaced. Furthermore automation can even increase the depth of testing in a shorter time, raising not only the efficiency but also the quality. Prc005 is not specific on where the boundaries of the protection systems lie. A comprehensive testing program should simulate fault and normal operating conditions of the relay. Inspection, testing and commissioning of electrical. Circuit breakers that have thermalmagnetic or electromechanical trip units can only be verified for correct functioning via the primary current injection test method. This book was written for relay testers, rather than design engineers, so you no longer have to decipher engineering textbooks when performing relay tests. This guide provides a comprehensive overview of inspection and test procedures for protective relays in electrical power systems. The main unit contacts must be blocked closed for this test. Field test procedure for protective relays csanyigroup.

Primary injection testing of protection system for wiring. In this paper, the authors present an overcurrent protection relay testing procedure by a applying special simulation hardware for a realtime powersystem digital simulation rtds. Endtoend testing is considered to be the ultimate test for protective relay protection schemes with two or more relays. Endtoend testing is considered to be the ultimate test for protective relay. Protective relays are used extensively across the power system to remove any element from service that suffers a short circuit, starts to operate abnormally or poses a risk to the operation of the system. It allows users to test our different relay tester. Standard for acceptance testing specifications for electrical. Operation, maintenance, and field test procedures for protective relays and associated circuits 5. Since type testing of a digital or numerical protection relay includes software and hardware testing, the type testing procedure is very complex and more challenging than a static or electromechanical relay. The standard test procedure is meant to operate automatically for as long as possible with as few parameter changes as possible although the projects differ. Iaictliac 60 field relay power system device function numbers a relay that functions on a given or abnormally low value or failure of machine field current, or on an excessive value. Protection system maintenance north american electric. The removal of the connection plug in drawout relays may reveal evidence of severe fault currents or contami. Protection systems require testing to assure proper operation 3 separate stages of testing over protection systems life type testing commission testing lifecycle maintenance testing commission testing is critical assure safety functional operation equally critical in both utility and industrial systems.

The method can be easily implemented in a protection relay test set 14, in order to facilitate the task for the test engineer. Inputs include those for auxiliary voltage, vt, ct, frequency, optically isolated digital inputs and communication circuits. Properly working protection devices help to maintain the safety of the system and to safeguard assets from damage. Learn the basics of differential protection of transformers. The testing of protection equipment schemes presents a. Protection relay testing procedure pdf get file protection relay testing procedure pdf cortana, text wife in bed and tell her cats been sick and needs clearing up. Combitest also means additional personnel safety during testing. Must also perform energizing procedures and in service load checks. Digital and numerical relays will have a selftest procedure that is detailed in the appropriate relay manual. Protective relay testing and maintenance guide testguy. Download existing settings from the protection database. Some utilities provide logic diagrams along with protection standards and during the commissioning stage the relay testers are expected to test the internal logic and perform dynamic tests, and end to end tests for the protection scheme. Protection relay output contacts are type tested to.

Protection relay testing procedures doble protection. If the relay trips then playback the case again with harmonic restraint enabled. It provides a basic introduction to endtoend testing along with clear, stepbystep procedures to apply in the field, including. Every facet of relay testing can be handled with the comprehensive line of relay test equipment from megger. This is the most comprehensive guide about motor relay testing and dynamic relay testing. Sp0518 protection relay testing for commissioning swp pdf file.

Protection relays guide list of ansi codes applied in the guide ansi code main protection function 5051 nondirectional phase overcurrent 50n51n nondirectional earth fault 67 directional phase overcurrent 67n directional earth fault 67yn admitance earth fault 37 phase undercurrent loss of load 4951 thermal overload. Protection system maintenance a nerc technical reference page 2 purpose. Comparing protectiverelaying commissioning and test. The purpose of this thesis is to develop a standard factory acceptance test procedure for protection systems in modular deliveries with omicron, a software program with which it is possible to test generator protection relays. Operation, maintenance, and field test procedures for.

For this reason it is very helpful to have a versatile test set, which also has the ability to record and analyze transient signals. This guide focuses on the general approach and specific procedures for testing protective relaying systems. Protection suite is the software interface of doble f6150 power system simulators and accessory equipment. If not available on the project, most of the equipment necessary can be borrowed from the denver office for making relay tests 5. Thus, it can be quite tricky to test a numerical transformer differential relay by secondary injection in order to verify that the relay is set properly to protect transformer in a particular application. Utilities have their own ways of commissioning and testing protection relays. In a test it is possible to inject signals to the isolated relay in order to observe its performance and operation limits. 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.

Pdf easy method for testing transformer differential relays. Secondary injection tests for checking the correct operation. The participant will learn the basics of distribution protection combined with handson, realistic training on actual relays. It is recommended that protective and auxiliary relays be given a complete calibration test and inspection at least once a year. Traditional relay testing plans are laser focused on the relay s protective elements like inverse time overcurrent 51 or line distance protection 21. Transformer protection ret650 ansi commissioning manual. Ia test i aw1 ib test i bw1 ic test i cw1 playback the case to the relay with harmonic restraint disabled. Circuit breakers equipped with solidstate trip devices can be tested using secondary current injection, which requires less time and expense to perform the test primary current testing is. The bureau of reclamation reclamation operates and maintains 58 hydro electric powerplants and many switchyards, pumping plants, and associated facilities in the 17 western united states. It includes everything ive learned about relay testing since the relay testing handbook. Protection relay testing for commissioning swp check this is the latest process zone version before use. Several manufacturers now produce portable relay test sets that will provided excellent results.

Protection relay testing procedures doble protection suite. Transformer differential protection, relay testing, sequence components. The protection system includes protective relays, associated communications systems, voltage and current sensing devices, station batteries, and direct current control circuitry. Power test power test is the software that includes all our relay testers. Commissioning of protective relay systems karl zimmerman, schweitzer engineering laboratories, inc. Combitest relay test system provides a wide range of testing capabilities. Acceptance test procedures are often found in the manufacturers supplied. The following sections of the ansineta standard for acceptance testing specifications for. Relay test automation the last section of this article highlights that standardization is the key strategy to dealing with the challenges protection engineers during the evolution from single to multifunctional relays, the challenges for protection testing have evolved on at least the same scale. A good set of testing equipment and relay tools are important. This relay testing book is a shorter, supplemental softcover handbook laserfocused on endtoend testing. If a protection system is displaying unexpected behavior, you need to find its cause quickly.

Acceptance testing, commissioning, and startup will include control power tests, current transformer and potential transformer tests, and any other device testing associated with the protective relay. Thus, a new standardized testing methodology for transformer differential protection relay. Secondary injection tests are always done prior to primary injection tests. Abstractperforming tests on individual relays is a common practice for relay engineers and technicians.

These tests should be followed to determine if the relay is operating correctly. 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. Even if the scheme has been thoroughly tested in the factory, wiring to the cts and vts on site may be incorrectly carried out, or the ctsvts may have been incorrectly installed. Assuming the relay which is responsible is known further information is needed to be evaluated 1. Operation, maintenance, and field test procedures for protective relays and associated circuits 1. Pdf mv switchgear protection relays inspection and test procedure find, read and cite all the research you need on. 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. We will start with a brief history of protective relays to compare the different.

Commission testing methods for protection systems mipsycon. All parts of the combiflex relay and the overall system can be accessed for testing. Primary injection testing of protection system for wiring errors between vts cts and relays photo credit. Voltage and current sensing devices magnetic core devices. Directional over current relay protection of parallel lines. Periodic relay testing is, first and foremost, preventive maintenance. Your source for universal protective relay testing training. Laboratory exercises will cover proper relay maintenance, specific test procedures, and detailed adjustment and calibration procedures utilizing state of the art relay test. Grounddistance relay connections, 360 groundfault neutralizer, effect on line relaying, 321 to mitigate the effect of a fault, 2 grounding protective relay for trans former protection, 263 ground preference, 91, 108 ground resistance, 303 groundingtranaformer protection, 268 hsrmoniccurrent restraint, for distance relays. A comprehensive overview of inspection and test procedures for protective relays in electrical power systems. Routine factory production tests these tests are done to show that protection relays are free from defects during. Numerical distance protection relay commissioning and testing.

Communication systems required for protection system operation. This test involves periodic testing of a relay protection system of a transmission line. Many utilities and industrials in north american still have a. As modern protective relays become increasingly more powerful and complex, many relay testers continue to use test procedures and philosophies that are based on previous generations of relays and their limitations. Tests are completed at each level, with the protection relay in the following operation modes. Commission testing methods for protection systems ken sletten minnesota power. Protection relay testing and commissioning cedengineering. Connect the threephase test set to the relay as follows. The numerical distance protection relay used is rel 5112. Each of these packages contains different tests for different users needs. Automated realtime simulator testing of protection relays. Purpose and scope the purpose of this standard work practice swp is to.

Most utilities have a wide variety of test plans and practices. 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. To ensure all transmission and generation protection systems affecting the reliability of the bulk electric system bes are maintained and tested. The purpose of secondary injection testing is to prove the correct operation of the protection scheme that is downstream from the inputs to the protection relay s. Protection relay selftest procedure digital and numerical relays will have a selftest procedure that is detailed in the appropriate relay manual. 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. Nov 22, 2018 testing and maintenance of protective relays always begins with a thorough visual and mechanical inspection. Efficient testing testing of modern protection ieds.