Created with years of experience, the SVERKER 650's intuitive interface, powerful functionality and other features combine together to create a comprehensive system for fully testing virtually all types of single phase protection. COM terminal when the relay isn't energized; thus, there is almost 0Ω resistance between the 2 terminals. Bonetti, Andrea, Janez Zakonjsek, and Urban Rudez. “Bringing ROCOF into Spotlight in Smart Grids: New Standardization and UFLS Method”, 2020. https://doi.org/10.1109/GPECOM49333.2020.9248722 If faults are not located in time, they can lead to major equipment damage or possibly even failure. IEC 60255-187-1, Functional requirements for restrained and unrestrained differential protection of motors, generators, and transformers

In 2012, an ad hoc working group – AHG2 “New protection requirements for the smart grid”– was formed and it submitted its report to TC 95 in 2014. This identified a need for revising some of the existing standards and for developing new standards taking into account the high penetration of distributed generation, which is posing new protection challenges. Revisions of IEC 60255-1, IEC 60255-26, and the new functional standard IEC 60255-181 were identified as high priorities. terminal to the COM (common) terminal, when the relay has no voltage going through it. This is because place the probe leads of the multimeter on the 2 terminals of the relay's coil. It doesn't matter which probe is placed on whichWhile IEC 60255-1 and IEC 60255-26 are still under revision, the new IEC 60255-181 Standard for Frequency and ROCOF protection functions was published in February 2019. Moreover, the IEC 60255-181 standard has been adopted relatively recently (autumn 2019) as the European standard EN IEC 60255-181, to be used without modifications in 34 countries in Europe.

It is worth mentioning that the standards do not specifically detail commissioning or routine tests for protection functions. Nevertheless, several clauses can be applied to these tests and doing so will help to minimise the risk of misunderstandings about validation in the field compared with the performance declared by the relay manufacturer or requested by the user, as previously explained. Also, manufacturers of relay test equipment are expected to implement the definitions and test methodologies detailed in the standards, in relation to both commissioning and maintenance tests. Both kits are basically identical - they are powerful, multifunctional relay testers which can easily be ported from testing point to testing point. The main difference between the 780 and the 750 is the 780 also includes continuous phase shift and adjustable frequency functions as well as a variable voltage source. Chair of IEC TC 38 and CENELEC TC 38 “Instrument transformers” and member of IECTC 38 WG 37 and WG 47. Megger developed the first software-driven protective relay test system in 1984, and we continue to provide models ranging from computer-controlled (with comprehensive yet simple, built-in, touch screen user interfaces) to manually operated test sets in portable and laboratory styles for every relay testing need. Relay test solutions may be expensive propositions when software is charged separately but with Megger solutions, the software required to test most relays is included with the test set so you don’t incur additional expenses.Sampled Values are used to transmit analog values of the energy system, for example from current and voltage transformers, via a digital network. Status information is exchanged between the devices via GOOSE messages, while signals are transmitted to the SCADA system using client/server communication (MMS). Need to make a log of your results? No problem with the SVERKER780 - hook the relay tester up to your PC via the built-in serial connection to export your results into Excel documents or use Megger's SVERKER Win software (sold separately) to create fully customisable reports and log data in real-time. Megger SVERKER780 Feature/Benefit Breakdown when the relay isn't energized; thus, there is an extremely high impedance between the 2 terminals. Bonetti, Andrea, Murty V.V.S. Yalla, and Stig Holst. “The IEC 60255-121:2014 Standard and Its Impact on Performance Specification, Testing and Evaluation of Distance Protection Relays”. In 2016 IEEE/PES Transmission and Distribution Conference and Exposition (T D), 1–6, 2016. https://doi.org/10.1109/TDC.2016.7520031 terminal and the other probe on the NO Terminal. Make sure that you read a high resistance of several megohm (MΩ). If you do, then

the NC terminal is normally closed, meaning there should be direct continuity from the NC terminal to the It is planned that the work being carried out by this group will be coordinated with the existing IEC 60255- 1xx series functional standards that consider voltage, current, temperature, etc. inputs in analog form, plus binary inputs and outputs. Future editions of the existing functional standard, as well as the new one, will take into account the voltage, current, temperature, etc. inputs in analog form and digital form in accordance with IEC 61850, as well as binary inputs and outputs and IEC 61850 GOOSE messages. In general, testing of traveling wave protection functions were not carried out when commissioning relays as this proved very difficult. OMICRON has therefore developed the TWX1 accessory, the world's first solution that makes testing of traveling wave protection functions possible in an uncomplicated manner even with conventional protection test sets.Not only should the test engineer be aware of these requirements, but test equipment manufacturers are also expected to implement standardised test methods in their test sets. As these two examples have shown, the standardisation chain extends far beyond the relay manufacturers. Leitloff, Volker, Hao Chen, Dehui Chen, Andrea Bonetti, Lei Xu, and Ahmed Mohamed. “Standardisation Challenges for Digital Inputs and Outputs of Protection Functions in IEC 60255 Series”. In ResearchGate. Glasgow, UK, 2019. https://www.researchgate.net/publication/334050781_Standardisation_Challenges_for_Digital_Inputs_and_Outputs_of_Protection_Functions_in_IEC_60255_series About the authors

After finishing the test of the breaker, the system measures currents, voltages, and other main parameters of the breaker and through a set algorithmShows time, current, voltage and other parameters. Also used to make settings (access setting mode by pressing MODE button) System-based protection testing can be used to verify, with minimum effort, whether the individual components in a protection system behave correctly as a group in the event of a fault. This approach makes it possible to detect hidden errors in the settings, logic and design of protection systems, regardless of the relay type or manufacturer. RelaySimTest provides you with the tools needed to optimally prepare and carry out system tests. may be 320Ω, 900Ω, or any of the various resistances. This will come specified with each specific relay used, along with the The Megger SVERKER780 relay tester is equipped with every measurement function you'll need, all shown in real time on the built-in LCD digital display. This powerful measurement section can display (in addition to time, voltage and current) Z, R, X, S, P, Q, phase angle and cos φ. An integrated voltmeter and ammeter are included for measurements, with the possibility to use the voltmeter as a second ammeter (ideal for testing differential relays).