SMRT46 and 46D multi-phase relay testers
High current, high power multi-phase relay test systems SMRT46, SMRT46D
High current, high power multi-phase relay test systems SMRT46, SMRT46D
Key Benefits
- Constant power output for better test results
- Higher output current for all instantaneous overcurrent relays
- IEC 61850 testing capability
- End-to-end test by one test engineer
Description
The SMRT46 and 46D are multipurpose, lightweight, field portable test sets capable of testing various electromechanical, solid-state and microprocessor-based protective relays, motor overload relays, and similar protective devices.
You can manually control the SMRT46 and 46D test systems with Megger’s new Smart Touch View Interface (STVI). The SMRT46D has this feature built-in, enabling it to be used without a PC via an intuitive, high-resolution graphic touch screen, whereas the SMRT46 requires an external device.
The STVI is a controller loaded with Megger’s user interface software. Its large, full colour, high resolution, TFT LCD touch screen allows you to perform manual, steady-state, and dynamic testing quickly and easily using the manual test screen and built-in preset test routines for the most popular relays. Menu screens and touch screen function buttons are provided to quickly and easily select the desired test function. Test results can be saved to the STVI for download to a USB drive to transfer or print test reports.
Both instruments can be placed under full computer control via the Advanced Visual Testing Software (AVTS) or the RTMS running on a PC. AVTS is a Microsoft Windows XP/Vista/7/8/10 compatible software program designed to manage all aspects of protective relay testing using the Megger SMRT46.
The test system may also be customised by adding the number of voltage-current modules, called VIGEN modules, needed for specific test applications with a maximum of three channels. For example, the SMRT46 or SMRT46D with three VIGEN Modules provides complete three-phase testing of three-phase impedance, directional power, negative sequence overcurrent and other devices that require a three-phase four-wire wye-connected source. The fourth voltage channel provides an AC reference/synchronising/polarising voltage, or a DC battery simulator voltage source.
Specifications
Frequently Asked Questions
Can the SMRT products work with many different types of mains supplies? Can they be powered from the local supply whatever its voltage and frequency?
Instruments in the SMRT series will operate without limitations from supplies anywhere between 100 and 240 V, with frequencies of 50 or 60 Hz. This caters to just about any public supply you’re likely to find in the world!
If my unit has a built-in display, can I still control it with my computer?
Yes, you can control all SMRT models with and without display via your PC or laptop.
Choosing the best relay test set to buy is a really confusing task! Why are there so many different options on offer?
The real answer is so that you can buy a test set that’s a good match for your requirements and budget. Relay test sets represent a substantial investment, so there’s little point in spending more than you need on buying one with many facilities you’ll never use. On the other hand, buying a test set that seems inexpensive but can’t readily meet all of your requirements is a false economy. You’ll either end up replacing it or having to use time-consuming and uncertain workarounds to carry out your tests. That’s why Megger offers such a wide range of options. Consider three-phase testing, for example. Most applications require three voltages and three currents, which is enough to simulate most three-phase systems. But sometimes, a fourth voltage is needed to test, for example, the synchro-check function in complex relays. And for testing transformer differential protection, six currents are needed! Megger offers test sets to cover all these applications, including the SMRT46, which you can configure to supply four voltages and three currents or, alternatively, six currents.
Are there test plans for my relays in the SMRT software?
RTMS includes a library of test plans called templates, which is available free of charge. The library can be downloaded and managed using a component of RTMS called “RTMS template manager.” Connect your PC to the internet, open “RTMS template manager”, and all the templates available in the cloud are shown. RTMS template manager will indicate which templates are already available on your PC. You can then download the ones that are not on your PC or update existing ones for which a newer version is available.The RTMS template manager will also indicate whether the templates are compatible with your software version. An upgrade of your local software version may be required to get some newer templates to work for you.
Can the SMRT read relay settings?
Relay settings can be read using RTMS from a variety of settings file formats or directly from relays. It is possible to read settings directly from SEL relays using the relay’s serial interface and a serial cable.It is also possible to read CSV files from Multilin relays and XRIO files from other manufacturers, like Schneider Electric.
Can I create my own test plans in the RTMS software?
Yes, you can create your own test plans using RTMS. The test plans are created as the tests are performed and added to the test report. The test report is, therefore, an active document that can be used to retest the same relay or other relays of the same kind. You can add tests to the test plan very easily. Additionally, you can create test plans in simulation mode in the software, making it extremely convenient since you don’t need to be connected to the unit or perform the actual tests to add them to the test plan.
Are licences of the software complimentary?
All the most important test functions are included with the free version of the software. This version includes tools such as ramping, advanced ramping, overcurrent, distance, sequencer, and differential. This complimentary version also allows you to create your own test plans. There’s a cost for other specialised features like COMTRADE playback, Power Swing, or Synchronizer.
Do I need to licence every PC?
RTMS software can be installed on as many PCs as you want without any additional licence. The use of the specialised features included in the Enhanced RTMS is enabled on the SMRT unit itself and can be run by any computer with the RTMS software installed.
Testing very high set values of overcurrent protection can be challenging. How can I do this safely, without risk of damage to the relay?
It’s true that performing a measurement of the pickup value by continuously injecting a high test current could thermally overload the relay, as most overcurrent relays must not have currents greater than ten times their nominal rating applied for longer than one second. With test sets in our SMRT family, however, you can overcome this test time limitation by using the pulse ramp feature. This produces a test current in the form of successive short pulses that increase in amplitude with each pulse, thereby keeping the relay within acceptable thermal duty cycle limits.
Does Megger have products and tools for IEC 61850 applications?
Yes! Megger is very active in this field. The company released its first products for IEC 61850 applications as early as 2009 and has been active in the development of the IEC 61850 standard since the mid 2000s.Today, Megger offers the FREJA and SMRT relay test sets, the hardware required to access the IEC 61850 network. Furthermore, the software Megger GOOSE Configurator (MGC) and Sampled Values Analyser (SVA) complete the IEC 61850 test system. With the MGC and SVA embedded in the SMRT and FREJA display models, the need to connect a computer to the IEC 61850 network is eliminated, enhancing cyber security.
