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DV Power RMO10T Manual

Winding ohmmeter & tap changer test set
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RMO10T
W I N D I N G O H M M E T E R
&
T A P C H A N G E R T E S T S E T
Manual
I
P
AB
BEKO
OWER

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Summary of Contents for DV Power RMO10T

  • Page 1 RMO10T W I N D I N G O H M M E T E R & T A P C H A N G E R T E S T S E T Manual BEKO OWER...

  • Page 2: Table Of Contents

    Error Messages........................29 Technical Data ........................32 10 Accessories.........................33 Manufacturer Contact Information....................33 Manual Version: RMO10T. MV. RT1-6.02 This Manual refers to the firmware version RT1-6.02 IBEKO POWER AB 2009 This Manual is a publication of IBEKO POWER AB, 181 33 Lidingö, Sweden.

  • Page 3: Introduction

    RMO10T should only be operated by trained and authorized personnel. Rules for Use • RMO10T should only be used when in a technically fit condition. Its use should be in accordance with the safety regulations for the actual working site and application. Always be aware of the dangers of high voltages and currents associated with this equipment and its environment.

  • Page 4: Designated Use

    Any other use of the RMO10T than the ones mentioned above is to be considered improper and will not only invalidate all customer warranty claims but also exempt the manufacturer from its liability for repair or exchange.
  • Page 5 The test is started by pressing the OMEGA button. The RMO10T injects current with a voltage as high as 60V. This ensures the test to be as short as possible and that the desired test current is reached faster.
  • Page 6 The TapC menu offers a user friendly way of measuring winding resistance in tap changers. RMO10T test set measures the winding resistance of individual taps of a power transformer’s tap changer, and checks whether the On-Load Tap Changer (OLTC) switches without a discontinuity. In the moment the tap is changed from tap to tap, the device detects the sudden, very short drop of the current flow.

  • Page 7: Description

    Press to measure the resistance current value. Press to measure the resistance value in TapC mode Green LED • Lights continuously when RMO10T is turned on. • Flashes when a test can be started. • Flashes alternately with the red LED during a test.
  • Page 8 Description 5.2 Rear Panel Components Connector for mains power supply Power switch I In this position, RMO10T is connected to the mains power supply. 0 In this position, RMO10T is separated from the mains power supply with both poles. Earth/ground connector.

  • Page 9: Getting Started

    • The test object is disconnected or separated from its circuit in accordance with the national safety regulations and is properly grounded to protective earth. • RMO10T itself is properly grounded. To do so, connect the grounding screw on the back of RMO10T’s to PE using a grounding cable.
  • Page 10 Connect the earth/ground lead first before doing any connections to the test object. Connect the mains lead to a mains outlet 100 V – 240 V AC and turn on RMO10T with the power switch on the back of the test set. The first shown on the display is the name of the product followed by the...
  • Page 11 The Ready state displays the selected test current and its duration is defined. If one of these values has to be changed, press STOP to return to the Curr menu. The flashing green LED indicates that RMO10T is now ready to start the test. Press the OMEGA button to run a test.
  • Page 12 (00-99 memory locations). Discharge Current The voltage at the RMO10T output generation is immediately stopped, but current still flows, because of the inductivity of test objects. Because of the enormous amount of energy that can be stored in a magnetic field, precautions should be taken before disconnecting the test leads from the transformer that is under test.
  • Page 13 Setting the Measurement Parameters Turn on RMO10T with the power switch on the back of the test set. The display shows the Curr menu and the green LED lights up. Press button LEFT and using UP button go to the TapC menu.
  • Page 14 (here ). At the 4,6% moment the test current shown on the display is stable, the RMO10T shows the resistance value in new tap position (here At the moment the test resistance is stable...
  • Page 15 "Discontinuity" Discharge Current The voltage at the RMO10T output generation is immediately stopped, but current still flows, because of the inductivity of test objects. Because of the enormous amount of energy that can be stored in a magnetic field, precautions should be taken before disconnecting the test leads from the transformer that is under test.
  • Page 16 (refer to section 7.4 on page 20). 6.3 Viewing Results of Previous Tests RMO10T stores up to 100 test results. They can be viewed using the Mem menu at memory positions from 0 to 99.
  • Page 17 RMO10T Getting Started 6.5 Printing the Test Results RMO10T stores up to 100 test results. They can be printed using the Print menu at memory positions 0 ... 99. Go to Print menu using and then button. Selecting first and last memory position and press LEFT button.

  • Page 18: Rmowin-T2M Software

    - Controlling and starting RMO10T when the tests are performed from the PC; the results could be stored to PC; results reading interval is adjustable, - Transfer of test parameters from the local RMO10T memory to the PC with the possibility of writing the notes on objects being measured, and appropriate comments.
  • Page 19 RMO10T RMOWin-T2M Software 7.3 Starting RMOWin-T2M Connect the USB port of the RMO10T Winding Ohmmeter and the PC, using a serial cable. Turn RMO10T on. Start RMOWin-T2M: - Click on ”Start”, - Click on ”Programs”, - Click on ''RMOWin-T2M’’, or duble click at icon on the desktop.
  • Page 20 RMOWin-T2M Software 7.4 Graphic function Using a PC together with RMO10T device in the Tap Changer mode it is possible to conclude about tap changer conditions analyzing a graph which represents dynamic resistance during tap changes. Figure above shows connections between a PC and RMO10T.
  • Page 21 RMO10T RMOWin-T2M Software Press button to start the test current. When the test current is stabilized press button to OMEGA OMEGA measure resistance in the first tap changer position. Measured resistance value is saved in current memory location and memory location is automatically changed to the next position.
  • Page 22 RMO10T RMOWin-T2M Software It is possible to zoom in a part of the graph of the interest by holding down the Shift key and dragging the left mouse button around the required area. While dragging around the area, the dotted rectangle is shown around the selected area.
  • Page 23 RMO10T RMOWin-T2M Software 7.5 Main Menu The illustration below depicts the main menu. File Open 1. In your RMOWin-T2M program, click File, and then click Open. 2. In the Look in list, click the drive, folder that contains the file you want to open.
  • Page 24 RMO10T is connected, with the appropriate cable, to the PC and the green led diode ”Communication” is lit (ON). The results a user wants to transfer from the RMO10T memory to the PC can be selected according to following criterion: All the test results are being transferred from the internal RMO10T memory to the PC.
  • Page 25 These comments will be displayed in the table together with the results. Transfer When this key is pressed, the selected results are transferred from the internal RMO10T memory to the PC. Unless the user chooses some other option, all the results from the RMO10T memory will be transferred (the option All is a default).
  • Page 26 RMO10T RMOWin-T2M Software Tap Changer mode All columns are the same except the following: - Resistance 1 : the measured resistance (R) - Ripple : the measured current ripple in percents - The results in other columns, which are not relevant to the Tap changer mode, are zeros.
  • Page 27 Define the date format that is going to be shown in the table with the results of the test. Interval Its purpose is selection of time interval for reading results from RMO10T to PC. At the expiration of this interval the last measured result from RMO10T to PC will be written, and this process will repeat at the expiration of the next period.
  • Page 28 Resistance compensation is a feature that enables displaying resistance calculated to reference temperature. This feature is available when controlling RMO10T from the PC. Two new columns are displayed in the data table, denoting the calculated resistance values. When the measurement is performed for the first time the following dialog window is displayed.

  • Page 29: Error Messages

    RMO10T Error Messages 8 Error Messages Any operational error is indicated by a red LED and accompanied by an alarm. Furthermore, the display indicates an error status message. To stop the alarm buzzer, remove the status message on the display, and return to the Curr menu, press the button.
  • Page 30 In this case, wait for the test set to cool down and repeat the test. 8.6 Error Message "Mains Voltage < 90V" This message is displayed when RMO10T’s mains voltage is below 90V. Figure 8-5: Error message "Mains Voltage < 90V" In this case, to reset the status message you must restart RMO10T.
  • Page 31 RMO10T Error Messages 8.7 Error Messages "Error printer" and "Check paper" The message "Error printer" is displayed if hardware error is apparent at the printer. Check weather black shaft is in proper position. If yes and the error occurs repeatedly, please contact IBEKO POWER AB (refer to section ”Manufacturer Contact Information”).

  • Page 32: Technical Data

    IEC 61010-1 UL 3111-1 CAN/CSA-C22.2 No 1010.1-92 Electromagnetic Compatibility (EMC) CE conformity EMC standard 89/336/EEC Emission EN 50081-2, EN 61000-3-2/3 Interference Immunity EN 50082-2 USB Interface RMO10T is equipped with an USB serial interface to connect to an external computer.

  • Page 33: Accessories

    RMO10T Accessories, Manufacturer Contact Information not connected not connected not connected not connected Housing = shield not connected TXD (out) Transmit Data RXD (in) Receive Data not connected Ground 10 Accessories Article No Standard Current cables 2 x 10 m, 2,5 mm...

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