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ADWEL DWR-10 Reporter User Manual

Winding resistance test set
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User Manual
Model DWR-10 Reporter
Winding Resistance Test Set
ADWEL
International
Limited

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  • Page 1 All manuals and user guides at all-guides.com User Manual Model DWR-10 Reporter Winding Resistance Test Set ADWEL International Limited...
  • Page 2 Limited except for information supplied by other parties. No reproduction of the whole or any part is to be made without the authority of ADWEL International Limited DWR-10 Reporter™ is a trademark of ADWEL International Ltd. Head Office: ADWEL International Ltd.

  • Page 3: Table Of Contents

    All manuals and user guides at all-guides.com Table of Contents Table of Contents Safety Warnings............vii Safety Symbols...........vii High Voltage Safety Precautions ......viii Built-in Safety Precautions........ix Power Source............ix Chapter 1, Introduction...........1 Application............1 Features ..............2 Options and Accessories ........3 Standard Accessories ..........3 Test Leads ............
  • Page 4 All manuals and user guides at all-guides.com Table of Contents Measuring Window ..........14 Channel Board............. 15 Protection Circuit State....... 15 Measurement Display ......... 16 Current/Dump Status Bar........17 Toolbars ............. 19 Default Toolbar ........... 20 Print Toolbar ............21 Keyboard Toolbar..........
  • Page 5 All manuals and user guides at all-guides.com Table of Contents Testing Without Saving ......40 Testing and Saving ........40 Stability of Readings........41 Testing in Timed Mode........42 Changing Windings and Testing Taps....45 Changing Winding Connections......45 Testing Tap with On-load Tap Changer....45 Testing Tap with De-energized Tap Changer..
  • Page 6 All manuals and user guides at all-guides.com...

  • Page 7: Safety Warnings

    All manuals and user guides at all-guides.com Safety Warnings The DWR-10 can produce lethal voltages. This can occur in any high-voltage equipment when there is an interruption in current. Comply with all equipment grounding instructions to avoid dangerous electrical shocks. Only properly trained personnel should use the DWR-10.

  • Page 8: High Voltage Safety Precautions

    All manuals and user guides at all-guides.com Safety Warnings On the test set, the symbol with a "lightning flash arrow" alerts you to the presence of an uninsulated voltage with enough magnitude to produce an electric shock. Whenever there is current in the load, a flashing warning logo will appear, along with a warning message and an audible warning tone.

  • Page 9: Built-In Safety Precautions

    All manuals and user guides at all-guides.com Safety Warnings • Wearing rubber glovers is recommended as a routine safety precaution whenever working with the test set. • Maintenance must be performed by qualified personnel who are familiar with the construction and operation of the test set and the hazards involved.
  • Page 10 All manuals and user guides at all-guides.com Safety Warnings Before connecting to the power source, determine that the instrument rating matches the voltage of the power source and has a suitable two-pole, three-terminal grounding type connector. Before plugging in the three-wire power cord, make sure the receptacle is properly wired and has a ground contact.

  • Page 11: Chapter 1, Introduction

    All manuals and user guides at all-guides.com Chapter Introduction The Digital Winding Resistance Reporter, Model DWR- 10, provides accurate, high-resolution measurement of transformer winding resistance. Application Transformers have many internal connections that can become loose as a result of poor quality, vibration from years of service, or from through faults.

  • Page 12: Features

    All manuals and user guides at all-guides.com Chapter 1 — Introduction Features • Ability to measure and save more than 10,000 high- resolution test results, including tap and winding details, and transformer nameplate data • High resolution (4½ digits) and high accuracy (0.25%) for precise measurements •...

  • Page 13: Options And Accessories

    All manuals and user guides at all-guides.com Chapter 1 — Introduction • Sigma-delta A/D converters and notch filters on input channels to eliminate effects of substation noise • Robust power supply for fast testing of large power transformers • Remote tap-changer operation Options and Accessories Standard Accessories The DWR-10 comes with these standard accessories:...

  • Page 14: Optional Rigid Carrying Case

    All manuals and user guides at all-guides.com Chapter 1 — Introduction Optional Rigid Carrying Case To carry or transport the DWR-10 safely, the instrument is also available in an injection-molded case with rigid reinforced walls. An extendable handle and 3-inch wheels make maneuvering easy.
  • Page 15 DC resistance of the transformer windings. The ADWEL DWR-10 addresses this challenge in several ways, so that the instrument can achieve stable resistance readings on the largest transformers in record time.
  • Page 16 All manuals and user guides at all-guides.com...

  • Page 17: Chapter 2, Getting To Know The Dwr-10

    All manuals and user guides at all-guides.com Chapter Getting to Know the DWR-10 This chapter describes the various features, tools, and screens of the DWR-10, and how to navigate the system. September 2004 Page 7...

  • Page 18: Main Controls

    All manuals and user guides at all-guides.com Chapter 2 — Getting to Know the DWR-10 Main Controls Navigation Knob The navigation knob is located at the bottom center of the DWR-10 panel. To operate the knob: • Turn clockwise to move to the right. •...

  • Page 19: Switches And Connections

    All manuals and user guides at all-guides.com Chapter 2 — Getting to Know the DWR-10 Item Description Tap/Winding Press to open the Tap, Winding selection frame and define their names. Test/Dump Press to start or stop output current. Switches and Connections Power to the system is supplied through a standard outlet and detachable power cord at the top left of the DWR-10 panel.

  • Page 20: Buttons For 'T' Version

    All manuals and user guides at all-guides.com Chapter 2 — Getting to Know the DWR-10 Item Description Emergency Cuts off the DC current output (not the instrument button power supply). It is the large red mushroom button located at the bottom center of the DWR-10 panel. When you press this button, data is saved with the letter 'N' at the end of the filename, to indicate that the measurement file was not closed properly.
  • Page 21 All manuals and user guides at all-guides.com Chapter 2 — Getting to Know the DWR-10 • current/dumping status panel (under the measuring window) • toolbars (lower screen) Message line for commands and warnings. Protection indicator shows when current dumping is being done through that channel. Highlight and press knob to save measured values.

  • Page 22: Main Status Panel

    All manuals and user guides at all-guides.com Chapter 2 — Getting to Know the DWR-10 Indicates actual test current. Main Status Panel For detailed information on how to use Manual mode and Timed mode, see page 39. Manual Mode In Manual mode, the main status panel indicates the following information: Item Description...

  • Page 23: Timed Mode

    All manuals and user guides at all-guides.com Chapter 2 — Getting to Know the DWR-10 For a complete list of possible messages that can be displayed in the command prompt, see page 30. Timed Mode When the DWR-10 is set to Timed mode, the main status panel displays differently.

  • Page 24: Measuring Window

    All manuals and user guides at all-guides.com Chapter 2 — Getting to Know the DWR-10 Measuring Window The measuring window is the center part of the display. Two channel boards provide all necessary information about each measuring channel—A and B, along with corresponding data.

  • Page 25: Channel Board

    All manuals and user guides at all-guides.com Chapter 2 — Getting to Know the DWR-10 Channel Board Each channel board (A and B) displays measurement data for that channel. Protection Circuit State Item Description Protection Indicates when current dumping is being done through the crowbar of that channel.

  • Page 26: Measurement Display

    All manuals and user guides at all-guides.com Chapter 2 — Getting to Know the DWR-10 Measurement Display The measurement display shows the actual resistance value and the unit of measurement. If no measurements have been taken yet, a series of dashes will display. If one of the channels is not used, it can be turned OFF using the range switch for that channel.

  • Page 27: Current/Dump Status Bar

    All manuals and user guides at all-guides.com Chapter 2 — Getting to Know the DWR-10 Current/Dump Status Bar The status bar in the above screen example indicates that current has built up in the transformer, to 100% of nominal value. The status bar examples above shows the current building up inside the transformer winding.
  • Page 28 All manuals and user guides at all-guides.com Chapter 2 — Getting to Know the DWR-10 A yellow warning indicator on the left of the status bar appears when the current injection begins, and remains until dumping has ended. Do not disconnect any leads during this time. A warning prompt also appears on the main status panel (red background), warning you not to disconnect the leads while testing or dumping.

  • Page 29: Toolbars

    All manuals and user guides at all-guides.com Chapter 2 — Getting to Know the DWR-10 Toolbars Toolbars can be displayed by pressing a button on the screen, by selecting an option, by pressing the Back button, or by pressing a button on another toolbar. There are three toolbars: •...

  • Page 30: Default Toolbar

    All manuals and user guides at all-guides.com Chapter 2 — Getting to Know the DWR-10 Default Toolbar The default toolbar is displayed on start-up and has five control buttons. When another toolbar is displayed, you can press the Back button to return to the default toolbar. Item Description Current...

  • Page 31: Print Toolbar

    All manuals and user guides at all-guides.com Chapter 2 — Getting to Know the DWR-10 Item Description End & Press this function button to save the entire Record measuring file. This button closes a reading file Session properly. It is highlighted by default when you first activate the default toolbar.
  • Page 32 All manuals and user guides at all-guides.com Chapter 2 — Getting to Know the DWR-10 • Select a tap or winding field, or press the Tap/Winding button. • Press the Save button when the serial number field is still blank. To enter or modify data using the keyboard toolbar: 1.

  • Page 33: Menu List

    All manuals and user guides at all-guides.com Chapter 2 — Getting to Know the DWR-10 4. Continue highlighting and pressing letters and numbers till the field is complete. A maximum of twenty (20) characters can be entered per field. 5. When the field is complete, press the End button on the keyboard.

  • Page 34: Menu Structure

    All manuals and user guides at all-guides.com Chapter 2 — Getting to Know the DWR-10 Menu Structure Unit Definition Mode Manual Timed Print Time Interval Files Open File Viewer Delete One File Delete All Files System Date/Time Sound High Medium Communication Port RS-232 Language...
  • Page 35 All manuals and user guides at all-guides.com Chapter 2 — Getting to Know the DWR-10 Enter data in the Unit Definition window using the keyboard toolbar, which displays automatically when the window opens. Item Description Serial Enter the serial number of the transformer. number Company Enter your company name.

  • Page 36: Mode Menu Option

    All manuals and user guides at all-guides.com Chapter 2 — Getting to Know the DWR-10 Mode Menu Option The Mode option on the menu list allows you to select the measuring mode for the DWR-10, either manual or timed. Manual mode is the default value. For detailed information on these modes, see page 39.

  • Page 37: Files Menu Option

    All manuals and user guides at all-guides.com Chapter 2 — Getting to Know the DWR-10 Files Menu Option The Files option allows you to open the File Viewer to open or delete a single file, or delete all files. For detailed information on the File Viewer, see page 47. September 2004 Page 27...

  • Page 38: System Menu Option

    All manuals and user guides at all-guides.com Chapter 2 — Getting to Know the DWR-10 System Menu Option Select the System menu option to adjust various settings that do not influence the measuring. There are five sub- menu options. Item Description Date/Time Displays a window where you can update the date...
  • Page 39 Select the language. The default is English. Selecting another language will automatically convert all screen and field information to that language. About Displays information about the DWR-10, including software versions, serial number, and ADWEL contact information. September 2004 Page 29...

  • Page 40: Prompt Messages

    All manuals and user guides at all-guides.com Chapter 2 — Getting to Know the DWR-10 Prompt Messages Various messages may display in the command prompt line, as described below. Regular Messages Regular messages provide information on the instrument status, or suggest an action to take. They display in white letters on a black background.

  • Page 41: Error Messages

    Error messages comes with an error number, which can be helpful for the service person to diagnose and repair the problem. Record the text of the error message and the error number and contact ADWEL International for additional help and information. September 2004...
  • Page 42 All manuals and user guides at all-guides.com...

  • Page 43: Chapter 3, Measuring With The Dwr-10

    All manuals and user guides at all-guides.com Chapter Measuring with the DWR-10 Preparation Locating the DWR-10 Find a convenient location for the DWR-10. • It should be within 15 to 20 feet of all transformer connections and tap changer controls. •...

  • Page 44: Turning On The Dwr-10

    Turning On the DWR-10 Turn on the power switch. A splash window appears with the ADWEL logo and the DWR logo. It also displays the code versions of the hardware. Each time the instrument starts up, it goes through a memory defragmentation process that compacts space for recordings.

  • Page 45: List Of Current Outputs And Ranges

    All manuals and user guides at all-guides.com Chapter 3 — Measuring with the DWR-10 Other current outputs can be set to test resistance up to 2000 ohms. Refer to the following table for a complete list of current outputs and measuring ranges. Always use the highest current possible, because this will provide the fastest testing.

  • Page 46: Testing One Or Two Windings

    All manuals and user guides at all-guides.com Chapter 3 — Measuring with the DWR-10 If the substation is energized, choose a location that is on the de-energized side of the transformer to reduce effects on induction on the test cables and the test set. The test set can tolerate up to 40 volts p-p (peak to peak) between positive and negative terminals, and no more than 50 V from any terminal to ground.

  • Page 47: Series Connection Table

    All manuals and user guides at all-guides.com Chapter 3 — Measuring with the DWR-10 common vector groups. Other connections may be configured by connecting the windings as implied by the connection diagrams in Appendix B. In a four-terminal connection, the current and potential leads must not touch each other, and the potential connections must be electrically within the current lead connections.

  • Page 48: Changing Tap And Winding Names

    All manuals and user guides at all-guides.com Chapter 3 — Measuring with the DWR-10 Changing Tap and Winding Names Taps and windings need to be designated with labels in DWR-10 before measurements can be saved. Editing of tap and winding names can be done at any time. 1.

  • Page 49: Test Modes

    All manuals and user guides at all-guides.com Chapter 3 — Measuring with the DWR-10 6. Repeat the above steps for the B-channel. 7. Press the Back button to exit. Test Modes There are two modes of operation: Manual and Timed. In Manual mode, you can manually take and record measurements one at a time.

  • Page 50: Testing Without Saving

    All manuals and user guides at all-guides.com Chapter 3 — Measuring with the DWR-10 2. Decide if you want to test one winding at a time, or two windings in series. (To test two in series, see the instructions above.) 3.

  • Page 51: Stability Of Readings

    All manuals and user guides at all-guides.com Chapter 3 — Measuring with the DWR-10 6. Press the Test/Dump button to apply current and start the test. (See Stability of Readings, below). 7. When the reading is stable, highlight the Save icon and press the knob to save the readings.

  • Page 52: Testing In Timed Mode

    All manuals and user guides at all-guides.com Chapter 3 — Measuring with the DWR-10 After the current has stabilized, wait for the resistance readings to stabilize. Observe the stability indicators on the screen. • When readings begin or if they remain unstable, the indicator is gray.
  • Page 53 All manuals and user guides at all-guides.com Chapter 3 — Measuring with the DWR-10 2. Accept or change the interval, anywhere from 5 to 100 seconds. The default is 15 seconds. A 15-second interval means the DWR-10 will perform a winding resistance test every 15 seconds, automatically.
  • Page 54 All manuals and user guides at all-guides.com Chapter 3 — Measuring with the DWR-10 When sufficient readings have been recorded, you can either stop the automatic measurements or test another winding. To stop recording measurements: 1. Press either the End & Record Session button on the default toolbar, or the Clock On/Off button.

  • Page 55: Changing Windings And Testing Taps

    All manuals and user guides at all-guides.com Chapter 3 — Measuring with the DWR-10 Changing Windings and Testing Taps Changing Winding Connections If you need to change the winding connections: 1. Press the Test/Dump button to interrupt the current injection. 2.

  • Page 56: Testing Tap With De-Energized Tap Changer

    All manuals and user guides at all-guides.com Chapter 3 — Measuring with the DWR-10 6. Press the Auto On/Off button to start recording. 7. Save the reading when stable. After raising the taps, you may need to change the connections again in order to lower the taps. Testing Tap with De-energized Tap Changer To test a tap with a de-energized tap changer (DETC): 1.

  • Page 57: Chapter 4, File Management

    All manuals and user guides at all-guides.com Chapter File Management File Viewer The Files option in the menu list allows you to open the File Viewer to open or delete selected files, or delete all files. Quick Start 1. Press Open File Viewer from the menu list. 2.

  • Page 58: Open File Viewer

    All manuals and user guides at all-guides.com Chapter 4 — File Management Open File Viewer To select and open a saved file: 1. Select Open File Viewer from the menu list. 2. When the list of files appears, the first reading is highlighted blue by default.

  • Page 59: File Information

    All manuals and user guides at all-guides.com Chapter 4 — File Management 4. The red frame around the Yes button indicates that Yes is selected by default. Press to open the file. (Turn the knob to select No and return to the File Viewer.) 5.

  • Page 60: Delete One File

    All manuals and user guides at all-guides.com Chapter 4 — File Management Delete One File To delete a single file from the File Viewer list: 1. Press the Delete One File menu option. 2. When the list of files appears, the first reading is highlighted red by default.

  • Page 61: Delete All Files

    All manuals and user guides at all-guides.com Chapter 4 — File Management Delete All Files After you have downloaded all the saved files to a PC, you can free up memory on the DWR-10 by pressing the Delete All Files menu option. A warning window displays to confirm that you want to delete all the files.
  • Page 62 All manuals and user guides at all-guides.com Chapter 4 — File Management 2. Turn on the DWR-10. 3. Press the Menu button. 4. Select Systems from the menu list. 5. Select the communication port: RS-232 or USB. (An additional driver is required for the USB port—install this on the PC from the CD-ROM provided.) 6.

  • Page 63: Dwr File Transfer Window

    All manuals and user guides at all-guides.com Chapter 4 — File Management DWR File Transfer Window Item Description Quit Press to close the DWR File Transfer window Select Press to select the directory where transferred files Directory will be stored. Get File Press to start transferring data from the DWR-10 to the PC.
  • Page 64 All manuals and user guides at all-guides.com Chapter 4 — File Management Item Description 78QPCT22 Serial number of the transformer _ and - Separator characters T (or M) Test mode. 'T' is Timed mode and 'M' is Manual mode. Number of files (transformers) with the same name (serial number) Ok (or N) 'OK' indicates that the file was saved properly.

  • Page 65: Printed Reports

    All manuals and user guides at all-guides.com Chapter 4 — File Management Printed Reports The following figure shows a typical DWR-10 print-out for Manual mode. Item Description Header The header area of the print-out displays all the information entered in the Unit Definition window (see page 24).
  • Page 66 All manuals and user guides at all-guides.com Chapter 4 — File Management Item Description Serial Displays the serial number of the transformer from the Unit Definition window. The serial number becomes the file name. Company, The rest of the fields in the header display data Station, etc.

  • Page 67: Appendix A, Technical Specifications

    All manuals and user guides at all-guides.com Appendix Technical Specifications Item Description Power Input • 90 to 132 VAC, 50/60 Hz • 198 to 256 VAC, 50/60 Hz, 550 VA max Test Current 10, 1, 0.1 and 0.01 amps DC Test Voltage 30 VDC Resistance...
  • Page 68 All manuals and user guides at all-guides.com Appendix A — Technical Specifications Item Description • Graphical User 120 mm x 90 mm bright LCD display visible Interface in bright sunlight • Displays: Actual current, measured values, reading stability, protection status, taps, windings and transformer details •...

  • Page 69: Appendix B, Connection Diagrams

    All manuals and user guides at all-guides.com Appendix Connection Diagrams This Appendix contains diagrams showing various options for connecting the DWR-10 to a transformer, as well as ANSI vector diagrams and connection matrices. Winding Diagrams Single Phase, One Winding September 2004 Page 59...

  • Page 70: Single Phase, Two Winding Test

    All manuals and user guides at all-guides.com Appendix B — Connection Diagrams Single Phase, Two Winding Test Page 60 September 2004...

  • Page 71: Three Phase, Two Windings, Accessible Neutral

    All manuals and user guides at all-guides.com Appendix B — Connection Diagrams Three Phase, Two Windings, Accessible Neutral September 2004 Page 61...

  • Page 72: Non-Accessible Neutral

    All manuals and user guides at all-guides.com Appendix B — Connection Diagrams Three Phase, One Winding, Non-Accessible Neutral Page 62 September 2004...

  • Page 73: Delta Delta, Two Windings

    All manuals and user guides at all-guides.com Appendix B — Connection Diagrams Delta Delta, Two Windings September 2004 Page 63...

  • Page 74: Ansi Vector Diagrams & Connection Matrices

    All manuals and user guides at all-guides.com Appendix B — Connection Diagrams ANSI Vector Diagrams & Connection Matrices Page 64 September 2004...

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