Relay and Secondary Injection Testing

The Megger MRCT is a light weight, robust, portable unit used to perform demagnetization, ratio, saturation, winding resistance, polarity, phase deviation, and insulation tests on current transformers. The MRCT automatically calculates ratio errors, saturation curves, and knee points. The MRCT provides a microprocessor-controlled variable voltage and current output and precision instrumentation for automatically testing single and multi ratio CTs, reducing testing time and increasing productivity. The MRCT will directly connect to multi ratio CT’s and perform all tests – saturation, ratio and polarity, winding resistance and insulation – on all taps with the push of a button and without changing leads.

The MRCT can be controlled via Megger’s Smart Touch View Interface (STVI) controller, a full color, high resolution, LCD touch screen which allows the user to perform manual and automatic testing quickly and easily using the manual test screen, as well as using pre-constructed test routines. The large display permits the user to easily read all pertinent data while the test is being performed and provides the ability to view the current transformer’s saturation curve. The unit can also be configured to come without a Megger STVI and can be controlled via a laptop with Megger’s PowerDB software.

Current transformers can be tested in their equipment configuration, such as being mounted in transformers, oil circuit breakers or switchgear. It is necessary for the equipment to be completely isolated from the electrical system prior to testing.

The innovative Sverker 900 test set, which has been conceived as an engineer’s “multi-function testbox” for protection testing. It features an intuitive user interface so that a PC is not required to operate the instrument.

It centres around a touchscreen that provides access to a wide range of pre-configured virtual test instruments, allowing the required test function to be selected quickly and easily. Full manual control and configuration are also supported and, in addition to the touchscreen, the instrument is provided with a large rotary knob that can be configured as required to control the current and voltage generators.

To make the Sverker 900 into a truly versatile “testbox”, additional tools are provided. These include an analogue ammeter and an analogue voltmeter, together with facilities for measuring a wide range of parameters such as phase angle; active, reactive and apparent power; power factor; resistance; reactance and frequency.

Other virtual instruments include a prefault-fault instrument, a ramping instrument and a sequence instrument. An impedance instrument is also provided, which allows relays to be tested directly from the impedance plane with conversion from impedance to voltages and currents carried out automatically by the test set. There is also a CT magnetisation instrument available. Test configurations and test results are stored in internal non-volatile memory and can be readily transferred to and from a PC via the instrument’s USB port.

In developing this innovative solution, key factors the designers took into account were the need for modern distribution relay protection schemes to be tested by three-phase secondary injection and also the requirement for test sets to provide high-power, high-amplitude outputs for use on high burden relays or when carrying out single-phase tests on current and voltage transformers.

The requirement for high-power single-phase test capabilities is addressed by making provision for connecting the three-phase current and voltage generators in series or parallel, as appropriate. This is by no means an unusual arrangement, but it is can involve a tangle of flexible connecting leads with plenty of scope for making wrong connections.

The Sverker 900 uses rigid links to make the necessary connections and the sockets for the links are positioned in such a way that it is physically impossible to make the wrong connections. These simple yet novel ideas allow convenience to be combined with safety and speed.

The Sverker 650 testing unit, whose design incorporates benefits gleaned from many years of experience in field relay testing, enjoys a well-earned reputation for reliability and convenience. Compact and powerful, it provides all of the functions needed for secondary testing of almost all types of single-phase protection now available on the market.

The SVERKER750 and SVERKER780 Relay Test Set are the engineer's toolbox. The control panel features a logical layout, SVERKER 650 users will find it comfortably familiar and will be able to start work right away.

The SVERKER750 and SVERKER780 features many functions that make relay testing more efficient. For example, its powerful measurement section can display (in addition to time, voltage and current) Z, R, X, S, P, Q, phase angle and cos φ. The voltmeter can also be used as a 2nd ammeter (when testing differential relays for example). All values are presented on a single easy-to-read display.

You can also test directional protective equipment efficiantly by means of the built-in variable voltage source. In SVERKER780 this has a continuous phase shift function and adjustable frequency as well. Automatic reclosing devices can also be tested – just as easily.

Designed to comply with EU standards and other personal and operational safety standards, SVERKER750 and SVERKER780 are also equipped with a serial port for communication with personal computers and the PC software SVERKER Win.

Since the compact SVERKER weighs only 18 kg (39 lbs), it’s easy to move from site to site.

Two or more SVERKER units can also be synchronized, which allows the user to operate a basic 3-phase test set.

As a stand-alone unit the SMRT1 has the "smart" combination of high compliance voltage and high current to test electromechanical, solid-state and microprocessor-based over current relays, including voltage controlled, voltage restraint and directional over current; test under/over voltage, single-phase impedance, single-phase power, directional, synchronizing, auto-synchronizing, negative sequence under/over voltage, current balance, frequency, volts/hertz, reclosing, thermal, and various other relays, see the Applications Guide for more.

The SMRT1 test system has the ability to be manually controlled with Megger's new Smart Touch View Interface^TM(STVI). The STVI, with its large, full colour, high resolution, TFT LCD touch screen allows the user to perform manual, steady-state and dynamic testing quickly and easily using the manual test screen, as well as using built-in preset test routines for most popular relays.

The STVI eliminates the need for a computer when testing virtually all types of relays. Menu screens and touch screen function buttons are provided to quickly and easily select the desired test function. Tests results can be saved to the PowerDB^TM ONBOARD for download to a memory stick to transfer or print test reports. For full automatic testing the SMRT1 may be controlled by Megger Advanced Visual Test Software (AVTS). AVTS is a Microsoft Windows XP/Vista^TM/7 compatible software program designed to manage all aspects of protective relay testing using the new Megger SMRT.

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Megger's New SMRT46/D Multi-phase Relay Test System expands your testing abilities by adding a 4th voltage channel, giving you another game-changing tool to help you get your job done faster and more efficiently.

A fourth voltage channel can provide a synchronizing reference voltage, or serve as a battery simulator.  With the voltage channels converted to currents, a three channel unit can provide 6 currents for testing three phase current differential relays, including harmonic restraint transformer differential relays

The added capabilites of the SMRT46D can be expanded upon even further when paired with Megger's full family of SMRT Relay Test Sets.  Our SMRT Relay Test Sets are designed to work together, allowing you to combine multiple units to ensure our test sets will meet your every need, regarless of the application.  

All of this functionality can be controlled either manually via the built-in touch-screen user interface on the SMRT46D, or placed under full computer control via the AVTS, Advanced Visual Testing Software, or the RTMS, Relay Test Management Software, running on a PC. The built-in user interface, called the Smart Touch-View Interface™, is Megger’s second generation of automatic / semi-automatic manual user interface running the new RTMS software.  

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The SMRT410D is a multipurpose, light-weight, field portable test set capable of testing a wide variety of electro-mechanical, solid state and microprocessor-based protective relays, motor overload relays, and similar protective devices.

The unit can be operated either manually via the built-in touchscreen user interface, or placed under full computer control via the AVTS, Advanced Visual Testing Software, or the STVI-software running on a PC. In addition, with the open communication architecture, the unit can also be used with third-party software programs such as National Instruments LabVIEW™.

The built-in user interface, called the Smart Touch-View Interface™ (STVI), is Megger’s second generation of automatic / semi-automatic manual user interface software. It incorporates a large, easy to read full color, high resolution, high definition, TFT LCD touch-screen display, which displays metered values such as AC and DC Amperes, AC and DC Volts, and Time in both seconds and cycles. Depending on the type of test selected, other values may be displayed, such as Phase Angle, Frequency, Ohms, Watts, VA, or Power Factor.

The Megger Model ERTS, Electronic Recloser Test Simulator unit is designed to interconnect to Megger Models MPRT, SMRT, and FREJA 400/500 relay test systems for easy field testing of electronically controlled reclosers. The ERTS has 14, 19 and 32 pin cable adapters to directly interface with the most common forms of reclosers such as the G&W Viper®, Elastimold® MVR, with SEL 351R and SEL 651R, and Cooper Forms 4, 5 and 6 recliners.

The ERTS provides the interface between the Megger relay test system and the recloser. The ERTS is used to test both the electronic recloser control and test the electrical operation of the recloser. The three different multi pin connectors provide flexibility in the different types of reclosers that the ERTS can simulate and test. The Megger relay test units provide the individual test currents and voltages through the interface unit, and monitor the individual trip and reclose circuits from the simulator.

The Megger PowerDB is a powerful software package providing data management for each of your acceptance and maintenance testing jobs.

Customer and contract information is quickly sorted and searched. Opening a specific record shows detailed information about the job, such as type of service, order date, sales contact, and invoice information. Job information and related test results can be transferred between field-use databases and a master database. Job and Device Productivity Reports track the time spent testing, which aids in bidding future jobs as well as personnel evaluation.

Test Forms

Designed from a ground up approach, PowerDB utilizes over 160 industry standard test forms that have been developed and used over 20 years by industry specialists. Test data entry screens and printed forms are identical allowing intuitive operation. What you see on the screen is what is printed in the reports. Entire test documentation packages consisting of test reports, comment & deficiency summaries, table of contents and field service reports are created with a single step. Once created, reports can be delivered electronically via email, CD-ROM, web server or Adobe® Acrobat®.

Test forms are designed for the majority of the electrical apparatus on the market today.

The PMM-2 is an ideal instrument for use in general electrical systems maintenance, electrical machine repairs, protective relay testing or in monitoring power at the electrical service entrance. Motor starting currents, voltages, and power can be captured for analysis.

The PMM-2 is designed to perform fast, accurate checking and testing of protective relay and meter installations during their commissioning and in routine maintenance.

For meter installations, unit can be configured to measure phase-to-phase voltage and single-phase current amplitudes and phase angles. Combined with a voltage or current source, the PMM-2 also becomes an excellent tool for testing and calibrating virtually any type of protective relay.

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The PAM420 multifunction phase angle meter is specifically designed for measurements on electrical power systems. It is capable of displaying phase angle, voltage, current, frequency, and timing. The phase angle is calculated from the relationship between two power signals, which can be two currents, two voltages or any combination. Currents up to 25 A and voltages up to 500 V can be applied directly to the instrument and the current input range can be extended by using external current transformers.

The PAM420 is suited for checking polyphase metering installations, testing protective relays, make comparative test in electrical substations, and verifying the phase angle deviation on power transformers. It is able to give you a direct digital reading to tenths of a degree (0.1°) and doesn't require calculation or interpretation. It can be calibrated locally, has a timer with high accuracy for contact or voltage trig, and comes with a rugged transport case for protection.

The MLLA Megger low level adaptor has been designed to filter the low-level outputs from the latest version of voltage/current generators in the Megger SMRT series and FREJA 500 series test sets. In Rogowski mode, the current channels will convert from a current source to a millivolt source. This will allow the current channel to simulate a low-level voltage source from a Rogowski coil and the MLLA can filter these low-level outputs.

There are three ranges for the Rogowski outputs: 2, 10, and 40 V. When in the low voltage mode, the voltage channel provides 0 to 2 V with high resolution and accuracy. Use the low-level outputs available on the latest versions of SMRT and FREJA relay test sets for testing relays, which use low voltage signals from non-conventional current transformers (CTs) and voltage transformers (VTs) such as Rogowski coils and CVTs.

The current and voltage channels can be configured to simulate low-level outputs using relay testing management software (RTMS) on an SMRT or FREJA 500 series unit. Low-level outputs are available from the voltage and current channel output terminals through the individual MLLA low-level filters. For testing relays like the ABB REF615 and Siemens 7SJ81, the low-level filters provide the interface between the SMRT/FREJA relay test set’s converted low-level output terminals and the low-level signal interface cables to the relay under test.

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The MGTR-II GPS timing reference is a small, lightweight, field portable, GPS satellite receiver system specifically designed to perform end-to-end tests of line protection schemes with Megger SMRT, MPRT, and PULSAR relay test systems. The MGTR-II provides a precise programmed output pulse (POP), with 100 nanoseconds of resolution. This output pulse provides a trigger synchronisation of two or more SMRT, MPRT, or PULSAR test systems to less than ±1 µ Sec of the Universal Time Coordinated (UTC).

The MGTR-II consists of a 12-channel GPS timing receiver integrated with proprietary microprocessor-controlled timing and interface logic and can track all available GPS satellites. The microprocessor-controlled timing and interface logic derives precise timing information. In addition, the MGTR-II provides a standard 1 Pulse Per Second (PPS), and ASCII serial time message, external event time-tag, an IRIG-B serial time code output signal and, most importantly, a programmable output pulse for performing end-to-end tests.

The unit comes with a 50 foot (15.2 m) long cable and all-weather, high performance, high noise immunity antenna with an integrated low noise preamplifier. The antenna comes with a 4 inch tall antenna mount.

You can control the MGTR-II through a standard RS-232 serial connection and the software provided, which also enables you to control and communicate with the unit.

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The Smart Touch View Interface™ (STVI) is extremely easy to use. The STVI uses a standard Ethernet cable, and Power Over Ethernet (POE) operation. The STVI includes non-volatile built-in data storage for saving tests and test results. Two USB ports is provided for transferring test results to an external storage device for transferring to a PC at a later stage and to possibly use a USB mouse and/or keyboard.

The TM200 digital timer is a timer that has been designed for use with the CSU600A current supply unit or ODEN A primary current injection test system as these units often need timers during testing.

Testing relays with SVERKER 650 also requires an extra timer if more than one timing cycle is to be measured, and the TM200 is ideal for these tasks thanks to its precise accuracy, its broad application range, and its compact dimensions. It is also tough and able to withstand testing environments.

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This software is a high fidelity simulator of the FREJA or SMRT test system. It allows you to have a digital version of a relay test set to test Siemens SIPROTEC DigitalTwin relays.

The FREJA and SMRT Digital Twin is the first of it’s type to be created and is a functional digital twin of Megger's relay test systems, FREJA and SMRT. This pioneering technology enables you to virtually test Siemens SIPROTEC 5 devices through Siemens’ cloud-based SIPROTEC DigitalTwin. The relay tests are performed online, before the physical devices are accessible, and with tested and approved protection settings, only a subset of the tests need to be repeated on the physical devices to ensure correct input and output hardware and connections.

The RTMS Relay Test Management Software, is the culmination of over 35 years of automatic relay testing experience. The RTMS is a Microsoft Windows XP Service Pack 3/Vista/7/8/10 compatible software program designed to manage all aspects of protective relay testing using the Megger SMRT series of units. The same software also runs on the Smart Touch View Interface (STVI), the handheld controller for the SMRT series.

Every SMRT unit comes with RTMS software for installing on a PC. It does not require a security dongle or license to operate, and can be loaded on as many customer owned PCs as required. The RTMS comes with two different levels: Standard and Enhanced.

The Standard level includes the manual test screen, semi-automatic and automatic tests for simple and advanced ramping, pickup and timing of overcurrent, undervoltage and overvoltage relays, directional overcurrent, sequence tests for reclosing and transient earth/ground fault simulation, impedance (both generic and relay specific from various manufacturers), and three-phase current differential. It also comes with the ability to perform special test applications with features such as the fault calculator, harmonics generator, symmetrical components, simplified power swing, and much more. Not only that, but it also includes a relay library with over 300 specific relays from 31 different relay manufacturers.

The Enhanced level is hardware-enabled when connected to a test set that has the RTMS Enhanced feature enabled (see the SMRT Ordering Information for details). The Enhanced level includes tests for synchroniser, under/over, and df/dt (ROCOF), frequency relay pickup and timing tests, IEEE/IEC COMTRADE Transient Waveform playback, enhanced power swing/out-of-step simulator, SSI file converter and playback, and IEC 61850 Megger GOOSE Configurator (MGC).

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