The Megger MRCT relay and current transformer test set is a lightweight, robust, portable unit used to perform demagnetisation, ratio, saturation, winding resistance, polarity, phase deviation, and insulation tests on current transformers (CTs). The MRCT automatically calculates ratio errors, saturation curves, and knee points and 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, 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 colour, high resolution, LCD touch screen which allows you to perform manual and automatic testing quickly and easily, and you can use the pre-constructed test routines to make testing even easier. The large display on the instrument enables you to easily read all pertinent data while the test is being performed and gives you 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.
Using the MRCT, current transformers can be tested in their equipment configuration, such as being mounted in transformers, oil circuit breakers, or switchgears. It is necessary for the equipment to be completely isolated from the electrical system prior to testing.
To Install PowerDB Lite on your PC
1) Download the file “install_powerdb_XXX.zip” onto your PC 2) Navigate to where you saved this file on your PC and extract the .exe file 3) Double click on the file "install_powerdb_XXX.exe" 4) This will start the installation of PowerDB Lite on your PC 5) Follow instructions displayed on PC
To Install PowerDB 10.5.4 on an STVI
1) Download the file “Onboard_install_XXX.zip” onto your PC 2) Unzip the folder and it will contain 1 folder named “Megger Update ” and 3 files “smrtchain.bat” and 2 named firmwareupdate 3) Transfer the folder and all 3 files onto the root of a USB drive 4) Turn on the MRCT unit with the STVI connected 5) Insert the USB device into the STVI 6) Click the System button to go to System Configuration screen 7) Click Update Firmware button 8) On popup screen, click STVI Firmware 9) Click Yes to answer “Would you like to run the update now” to start the updating process 10) When the update is completed, the STVI will reboot
Note: If a white screen appears and stays after the STVI reboots, turn the STVI off and on again to let it reboot.
To Install PowerDB 10.5.4 on an MRCT with Integrated Display
1) Download the file “Onboard_install_XXX.zip” onto your PC 2) Unzip the folder and it will contain 1 folder named “Megger Update ” and 3 files “smrtchain.bat” and 2 named firmwareupdate 3) Transfer the folder and all 3 files onto the root of a USB drive 4) Turn on the MRCT 5) Insert the USB device into the MRCT 6) Select the System button to go to System Configuration screen
7) Select Update Firmware button 8) On popup screen, click STVI Firmware 9) Click Yes to answer “Would you like to run the update now” to start the updating process 10) When the update is completed, the STVI will reboot
To Install MRCT FW 6.014 on an MRCT without Integrated Display
A) Using a PC
1. Extract the file "MRCT_Firmware_6_014" from the downloaded zip file to your PC 2. Turn on the MRCT 3. Start PowerDB and connect the PC to the MRCT 4. Select the System button to go to System Configuration screen
5. Select Update Firmware button 6. Browse to the location of the file MRCT_Firmware_6_014 on your PC 7. Select this file then select OPEN 8. The FW Update process will begin 9. When the update is complete, the MRCT will tell you to reboot when you hear clicking 10. After powering up, select the System button to go to System Configuration screen
11. Select View Versions button 12. Verify FW version is 6.014
B) Using an STVI
1. Unzip "MRCT_Firmware_6_014.zip” onto the root of a USB drive. The USB drive should now contain Megger/Updates/MRCT_Firmware_6_014 2. Connect the STVI to the MRCT and turn on the MRCT 3. Insert the USB device into the STVI 4. Select the System button to go to System Configuration screen
5. Select Update Firmware button 6. On popup screen, select MRCT Firmware 7. This will start the updating process 8. When the update is complete, the MRCT will tell you to reboot when you hear clicking 9. After powering up, select the System button to go to System Configuration screen
10. Select View Versions button 11. Verify FW version is 6.014
To Install MRCT FW 6.014 on MRCT with Integrated Display
1. Unzip "MRCT_Firmware_6_014.zip” onto the root of a USB drive. The USB drive should now contain Megger/Updates/MRCT_Firmware_6_014 2. Turn on the MRCT 3. Insert the USB drive into the MRCT 4. Select the System button to go to System Configuration screen
Released: September, 2023
Note: The downloaded file will be named "Install_powerdb_XXX.zip"
Note: The downloaded file will be named "Onboard_Install_XXX.zip"