SMRT1, SMRT 1D and SMRT 1B single-phase relay test systems
Compact, high-power relay test systems with IEC 61850 protection test capabilities and advanced touch interface.
Compact, high-power relay test systems with IEC 61850 protection test capabilities and advanced touch interface.
Key Benefits
- Constant power output
- High resolution and accuracy
- Circuit breaker simulator
- IEC 61850 test capability
Description
The SMRT1 single-phase relay test system, the SMRT1D and the SMRT1B are standalone units that combine high compliance voltage with high current to test electromechanical, solid-state and microprocessor-based overcurrent relays, including voltage controlled, voltage restraint, and directional overcurrent. It can also test under/overvoltage, negative sequence under/overvoltage, single-phase impedance, single-phase power, directional, synchronising, auto-synchronising, current balance, frequency, volts/hertz, reclosing, thermal, and various other relays (see the Applications sections for more).
The SMRT1 can be manually controlled with Megger’s new Smart Touch View Interface (STVI). The STVI is Megger’s second generation of automatic/semi-automatic manual user interface software. With its large, full colour, high resolution, TFT LCD touch screen, it allows you 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 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/dissipation factor. 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 STVI for download to a USB drive to transfer or print test reports. The SMRT1D has the STVI built into the unit.
For full automatic testing, the SMRT1 (or SMRT1D) can also be placed under full computer control via the Relay Test Management Software (RTMS) running on a PC. RTMS is a Microsoft Windows XP/Vista/7/8/10 compatible software program designed to manage all aspects of protective relay testing.
The SMRT1B can be controlled with the Integrated on-board display.
Frequently Asked Questions
This is a single-phase unit. How can I use more than one voltage and one current if I need to test a three-phase relay?
The SMRT1 can be connected in a daisy chain with other SMRT1/SMRT1D, SMRT46/SMRT46D or SMRT410/SMRT410D. A very common use of daisy chaining is using 3 SMRT1 units to obtain a three-phase unit.
When daisy chaining 3 SMRT1, do I need to have RTMS Enhanced licences for all of them?
No, only one of the SMRT1 needs to have the RTMS Enhanced licence.
Can I use the SMRT1 to test current-differential protection elements like a transformer differential?
Yes, the SMRT1 have one voltage channel and one current channel. However, the voltage channel can be used as a current channel so that you have 2 current channels available to test current differential elements. This way you can perform single phase tests of differential elements. For a three-phase test you can daisy chain three SMRT1 units.
Can I use the SMRT1 for 61850 substation testing?
The SMRT1 is an excellent option for 61850 tests. With this smaller and lighter unit, the user gets the same 61850 testing capabilities as with bigger units. Using the SMRT1 and the Sampled Values Analyzer (SVA) software you can generate 3 Sampled values streams to inject sampled values magnitudes into the network and perform different types of metering and protection tests. Additionally using the Megger GOOSE Configurator (MGC) software and perform all the GOOSE message related tests. With the MGC and SVA embedded in the SMRT1D model, the need to connect a computer to the IEC 61850 network is eliminated, enhancing cyber security.
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.
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 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!
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.
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.
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.
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.
