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RMO30T RMOWin-T5 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. First release the mouse button and then the Shift key, and the selected
area is zoomed in. The same operation can be repeated on the zoomed area. To show complete graph
double-click on the graph area.
The graph can look like on the figure below.

When the test is finished, press the

STOP

button. There will be message to save test results.

Note:

After the test is finished it is possible to recall the graph and analyze it.

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Summary of Contents for RMO30T

Page 1: ...RMO30T W I N D I N G OHMMETER Manual IBEKO POWER AB ...

Page 2: ...his Manual represents the technical status at the time of printing The product information specifications and all technical data contained within this Manual are not contractually binding IBEKO POWER AB reserves the right to make changes at any time to the technology and or configuration without announcement IBEKO POWER AB is not to be held liable for statements and declarations given in this Manu...

Page 3: ...ges and currents associated with this equipment and its environment Pay attention to the information provided in the Manual RMO30T is intended exclusively for the application areas specified in Designated Use The manufacturer and distributors are not liable for damage resulting from wrong usage The user alone assumes all responsibility and risk The instructions provided in this Manual are consider...

Page 4: ...tage may occur This is indicated by the red discharge LED and the beeper Power Supply Supply RMO30T only from a power outlet that is equipped with protective ground Instead of supplying RMO30T from phase neutral L1 N A N it may also be supplied from phase to phase e g L1 L2 A B However the voltage must not exceed 240V AC please refer to the section Technical Data 3 Designated Use The Winding Ohmme...

Page 5: ...g the STOP button Automatically after the selected time has expired In both cases upon completion of the test a measured value of the resistance is recorded to pre selected internal memory location Each time the Ω button is pushed results of the resistance and the test current value are stored into the internal memory of RMO30T and memory location changes to the next one Minimum measurement time i...

Page 6: ...malfunctioning one in a discontinuity during the change by the magnitude of the current ripple value An interruption will result in a much higher ripple value than a properly functioning tap changer Note In TapC menu only Ch 1 is the active channel Maximum test current selected in the TapC mode is 10A At the start of the test a check of cable continuity is performed In case of disconnection an ala...

Page 7: ...with the green LED during the Current test Flashes shortly during resistance measurement in the TapC test Flashes alternately with the green LED during the TapC test Red LED Discharge The red LED just above the red output connector remains lit until the accumulated energy of the measured object is reduced to a harmless level CAUTION Within the period when the discharge LED lights it is prohibited ...

Page 8: ...T RIGHT buttons and change the value with the UP DOWN buttons Pressing ENTER to confirm returns you to the Curr menu Pressing STOP to cancel returns you to the Curr menu Earth ground connector For protection against parasitic currents or voltages always connect RMO30T earth ground connector to protective ground PE Use only the original cable For safety reasons always establish this connection as t...

Page 9: ...ND THE BUZZER ARE OFF The Figure 6 2 shows simultaneous testing of both windings high and low on a single phase transformer In such a way it is possible to speed up the measurement when two channels are used to test both windings of the transformer When performing a two channel measurement connect the Current connection cable as in the example below Figure 6 2 and outside the Sense leads Figure 6 ...

Page 10: ...rity the internal circulating currents settle very quickly to obtain a balance and discharge with the same speed Even if only one side of the transformer needs to be tested connecting both high and low windings in series will speed up the test considerably On Off Connect the earth ground lead first before doing any connections to the test object Connect the mains lead to a mains outlet 100V 240V A...

Page 11: ...n position and using UP DOWN buttons select desired value Measuring with RMO30T Before a test can be started test current memory position and the test duration time need to be defined using the Curr menu Once these parameters are defined press ENTER to change to the Ready state The Ready state displays the selected test current and its duration is defined If one of these values has to be changed p...

Page 12: ...rge transformers can require several minutes to discharge C A U T I O N DO NOT DISCONNECT LEADS BEFORE DISCHARGING MESSAGE IS DISAPPEARED FROM THE DISPLAY Note Using RMOWin T5 the results could be stored to a PC where reading interval results is adjustable Results will be shown in a table in Excel format with an option to perform additional edit and graphic presentation Using RMOWin T5 after the t...

Page 13: ...d tap changer control since automatic measurement is possible with no need to remove the current between each tap change During switching the inputs of the instrument are protected to avoid damage that could occur should a tap changer prove to be faulty during testing From the Current outputs RMO30T injects a constant current into the power transformer From this current value and the voltage measu...

Page 14: ... disconnection an alarm is activated and the error message is shown on the display During the period of current stabilization both the green and the red LEDs flash alternately buzzer beeps and message WAIT is shown on display When the current is stabilized press the OMEGA button to start the resistance measurement of the Tap Changer starting position During the resistance measurement the red LED f...

Page 15: ...value depends on the construction of the tap changer It is recommended to compare current ripple values between each other got on one transformer Also it is recommended to compare current ripple results on one transformer with results from some previous test in order to follow conditions of that tap changer Figure 6 17 shows indication about possible tap changer bad conditions during the change fr...

Page 16: ...easured resistance R1 left channel or R2 right channel the test object s measured results R resistance or Δ current ripple the date or the time of this particular test To view the measured resistance R2 rather than the resistance R1 position the cursor on the first letter of the Mem menu here M and use the LEFT button to toggle between resistance R1 and R2 or between R and Δ To view the creation d...

Page 17: ...built in control prevents skipping these cooling times If you try to start a test within the cooling period the display shows Wait and a timer counting down After the cooling period has passed start a new test using the set test parameters by pressing the START button C u r r e n t T e s t Test current A Maximal test duration time min Cooling time for maximal test duration time min 5mA 10mA 50mA 1...

Page 18: ...MOWin T5 Data transferred from RMO30T can be Displayed in the form of tables Downloaded as an Excel file Every test reading parameter contains The memory location The date and the time of the test The real test current The measured resistance values The measured voltage values The measured ripple values The name of the object tested device and the useful comments 7 1 The minimum system requirement...

Page 19: ...me effect as pressing the keys on the RMO30T In case that the green led diode is not lit in the Communication window i e the red led diode is lit it is necessary to check the following Is the green led diode on the RMO30T lit Is the RMO30T signaling any error Is the serial cable connected tightly It is strongly recommended to write the information in the columns Object Code and Comments for better...

Page 20: ...rom tap to tap is shown on the graph The on line mode Graph control window shows information about current and next tap changer positions This information is not shown in the off line mode In the off line mode saved files containing graph data are opened Graph control window contains options and commands to control graph display Graph is displayed in separate window where user can zoom in and zoom...

Page 21: ...d pres OK button When the message Change the tap position is appeared on the main window change the tap position When the tap position is changed the graph with the test current during the change will be displayed That graph represents dynamic resistance during the change from tap to tap Press OMEGA button to measure resistance in the new tap changer position It is possible to press OMEGA button e...

Page 22: ...wn around the selected area First release the mouse button and then the Shift key and the selected area is zoomed in The same operation can be repeated on the zoomed area To show complete graph double click on the graph area The graph can look like on the figure below When the test is finished press the STOP button There will be message to save test results Note After the test is finished it is po...

Page 23: ...h file extension tcp Tap Changer Plot This file format can be opened by RMOWin T5 software to analyze the graph in the off line mode Other possible file formats are CSV Comma Separated Values and TXT plain text file If the file is saved in other format than tcp it is required to choose file type in the save dialog Files saved in the CSV format can be opened using Microsoft Excel and formatted in t...

Page 24: ...e The results that are obtained on the chosen date are going to be transferred to the PC Date from up to After choosing this option a new window appears It provides a choice to select a time interval when the measurement was done The results obtained during the time period between the chosen dates including the chosen dates are going to be transferred to the PC Memory from up to It opens a new win...

Page 25: ...d to the PC the table with the following layout will be displayed see illustration Current mode Memory the number of the memory location in the RMO30T where test results are located Date the date of the test Time the time of the test Current the real test current Voltage 1 the measured voltage on the channel 1 Ch 1 Resistance 1 the measured resistance on the channel 1 Ch 1 Voltage 2 the measured v...

Page 26: ...t unchecked Total taps The number of tap positions excluding nominal positions This could also be interpreted as the last tap position number Direction It means the direction of changing the tap positions Nominal positions It means whether the tap changer has nominal positions or not Nominal positions type It is the type of nominal positions Motor drive or manual cranking means of changing the tap...

Page 27: ...erval for reading results from RMO30T to PC At the expiration of this interval the last measured result from RMO30T to PC will be written and this process will repeat at the expiration of the next period Press function Interval The window as shown bellow will be opened Possible work ratings are AUTO and MANUAL By selecting AUTO rating and time interval the last measured result will be transferred ...

Page 28: ...erial User can choose between Copper Aluminium or can manually enter Tk value Values are entered in Celsius degrees It is also needed to set temperatures of device under test and reference temperature to which the results are to be calculated Measurement units It is possible to choose measurement units that will be displayed in saved Excel tables Default measurement units are in A mV and mΩ If dat...

Page 29: ...bject 8 2 Error Message Connection CH1 2 Connection CH1 The Error message Connection CH1 2 is displayed if both CH1 and CH2 are not connected in the Curr mode This message is displayed if either or voltage sense cable or both are disconnected either on the device side or the side of the test object The Error message Connection CH1 is displayed only if CH1 is not connected in the TapC mode This mes...

Page 30: ... is displayed if during the test the voltage at the test object is too high In this case reduce the test current and repeat the test In case when test voltage is not higher than 10V per channel but test current is still improperly high for that resistance error message Overcurrent is shown on the display Red LED will light continuously 8 5 Error Message Overheat This message is displayed when RMO3...

Page 31: ... C 13 o F 158 o F Humidity 5 95 relative humidity non condensing 9 4 Dimensions and Weight 198 mm x 255 mm x 380 mm W x H x D without handle 7 8 in x 10 in x 15 in Weight 9 2 kg 20 4lbs 9 5 Safety Standards European standards EN 61010 1 International standards IEC 61010 1 UL 3111 1 CAN CSA C22 2 No 1010 1 92 9 6 Electromagnetic Compatibility EMC CE conformity EMC standard 89 336 EEC Emission EN 50...

Page 32: ... 1x 5 m 10 mm2 RMOWin T5 PC software including USB cable Mains power cable Ground PE cable Transport case Additional Article No Current cables 2 x 15 m 10 mm with battery clips Sense cables 2 x 2 x 15 m 2 5 mm2 with alligator clips Test shunt 75 A 150 mV Cable bag Manufacturer Contact Information IBEKO POWER AB Box 1346 181 25 Lidingö Sweden Fax 46 8 731 77 99 E Mail support dv power com Website h...

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