Megger TTRU3 User Manual
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Megger TTRU3 User Manual

True 30 transformer turns ratiometer
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TTRU3
True 3Ø Transformer Turns Ratiometer
USER MANUAL

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  • Page 1 TTRU3 True 3Ø Transformer Turns Ratiometer USER MANUAL...
  • Page 2 TTRU3 User Manual us.megger.com...
  • Page 3 © 2016-2018, Megger Valley Forge. All rights reserved. The contents of this manual are the property of Megger Valley Forge. No part of this work may be repro- duced or transmitted in any form or by any means, except as permitted in written license agreement with Megger Valley Forge.

  • Page 4: Table Of Contents

    5.19 New Test Plan ..........36 4.2 Making Circuit Connections ......17 5.20 Auto OLTC Test in Progress ......40 4.3 PC Software Installation .........18 5.21 Test failed ............41 4.4 PC Software Update ........19 5.22 Test plan results ...........42 4.5 PowerDB Installation ........19 TTRU3 User Manual us.megger.com...
  • Page 5 Contents 5.23 Magnetic Balance Test Setup ......44 5.24 Results ............48 5.25 Simulation Mode .........51 5.26 PowerDB 3Ø Form ........52 6 Service .............54 6.1 Troubleshooting ..........54 6.2 Maintenance ..........55 6.3 Calibration .............55 6.4 Repairs ............55 Information subject to change without notice...

  • Page 6: Introduction

    1.2 Product overview The advantage to step up ratio testing is the ability The TTRU3 ratio meter test set is a fully automatic, to overcome voltage dependence exhibited by large self-checking, menu-driven turns ratiometer. The transformers. As transformers grow in size, more test set measures the turns ratio, vector relationship, voltage is required to generate flux.

  • Page 7: Model Variation & Accessories

    Optional Hardware Accessories Required Lead Accessories 1:1 Test Jig 2005-249 Lead P/Ns 2008-XXX-XX (8 total) can be used with the TTRU3 and qual- Safety Beacon – 18m (60ft) 1004-639 ify as required accessories 3Ø universal shielded test lead sets compatible with MTO3XX,...

  • Page 8: Top Panel

    Indicates when voltage is applied to test leads. USB On the Go Manual OLTC Control Switch TTRU3 appears as a thumb drive containing PC SW, user manual, and data sheet. Controls connected OLTC tap changer up/down. Enables PC Control after PC SW Installed.

  • Page 9: Side Panel

    Introduction 1.6 Side Panel Power Input Beacon Connection IEC 320 interface to mains power. Optional accessory Integrated fuse holder and filter. Functions similar to Warning Indicator O = Off Side panel reference I = On Quick reference for the various connections OLTC Connection Used in conjunction with Manual OLTC Control Ground...

  • Page 10: Quick Start & Feet

    Introduction 1.7 Quick Start Guide Quick Start Guide Feet Safety and connection reference in lid. Rotate out to provide a better viewing angle. TTRU3 User Manual us.megger.com...
  • Page 11 Introduction Information subject to change without notice...

  • Page 12: Safety

    Warning and Caution information provided in 2.2 Symbols this manual. • Treat all terminals of the TTRU3 and high-volt- age power equipment systems as potential electric shock hazards. Use all practical safety Caution, possibility of electric shock precautions to prevent contact with energized parts of the equipment and related circuits.

  • Page 13: Input Power Precautions

    Safety • Personnel using heart pacemakers should obtain expert advice on the possible risks before operating this equipment or being close to the equipment during operation. 2.4 Input Power Precautions This instrument operates from a single-phase, sine wave, power source. It has a three-wire power cord and requires a two-pole, three-terminal (live, neu- tral, and ground) type input source.

  • Page 14: Specifications

    25-250V | EXP / PRO models ±0.05% 0.8 – 200 (most Power Tx) Vibration/Drop/Shock MIL-STD-810G 1-24V ±0.10% 0.8 – 200 5 digit resolution Excitation Current Measurement Resolution: 0.1mA 0.1mA - 100mA 1mA 101-1000mA Accuracy: ± 1% ±0.1 mA TTRU3 User Manual www.megger.com...
  • Page 15 Specifications Touchscreen 180mm (7 in.) 800 x 480 Resolution 1100 NITS Transformer Testing Standards IEEE C57.152-2013 IEC 60076-1:2011 AS/NZS 6076 1:2014 CIGRE 445 2011 Case Ruggedized case with fold out feet Canvas carrying bag for leads and accessories Internal/External Data Storage Up to 2000 sets of 3 phase results internal storage Transferable via USB 2.0/3.0 thumb drive Communication/Control Software...

  • Page 16: Preparing For Test

    UUT. Grounds may be left in place. For all testing described herein, care shall be taken to ensure any and all unused clamps are isolated from each other, from ground, and from personnel. TTRU3 User Manual www.megger.com...

  • Page 17: Making Circuit Connections

    3 Specifications. Make sure ON/OFF switch is in the OFF position. Connect power cable to the TTRU3 first, then to the source. At this time, leave the ON/OFF switch in the OFF position. 3. Primary & Secondary/Tertiary leads to...

  • Page 18: Pc Software Installation

    7. Choose components and Select Next. -OR- Defaults recommended. Connect the TTRU3 to your PC with the included USB Cable and turn the TTRU3 on. After initiali- zation, a CD drive will appear on your PC which contains the software -OR- Download the latest PC SW from www.megger.

  • Page 19: Pc Software Update

    8. Proceed with the installation instructions in section 4.3. 4.5 PowerDB Installation 4. Click Next TTRU3 data can be imported into PowerDB. In ad- dition, the TTRU3 can be controlled from PowerDB. To install PowerDB, download the latest version from www.powerdb.com. Follow the instructions on screen to install PowerDB.

  • Page 20: Operation

    OPERATION 5.1 Initialization & Interface 5.3 Confirm/Cancel Turn on the TTRU3 using the Input AC Module. A Settings can either be saved or discarded using the boot screen with the Megger Logo will appear, buttons below: followed by a Loading bar, then the Home Screen.

  • Page 21: Home Screen

    Home screen. system information, including model, SW, and HW When in doubt, return to the home screen with the versions. You can also update your TTRU3 system home button to get your bearings. and export logs for troubleshooting 5.5.1 Home Screen Buttons...
  • Page 22 Operation 5.6.2 Update 9. Wait for the update to complete Updates can be performed at an ASC or Megger Factory. If the user chooses to install updates, they accept responsibility for all intended and unintended changes to the TTRU3. To update the system: 1.

  • Page 23: Settings Screen

    Adjust display settings Exit 5.7 Settings Screen Return to home OLTC The settings screen displays options for configuring Configure Pulse and the TTRU3 system and default test parameters Wait times of OLTC Optional SW Feature Administrative Password protected, infrequently changed settings...

  • Page 24: Measurement & Limits

    Error Limited OLTC Tap Ø Shift Optional SW feature Optional SW Feature 1 - 9 # OLTC Nominals Auto Continue After bootup, open last test Relative Phase Shift Optional SW Feature Only one winding can be OLTC TTRU3 User Manual us.megger.com...
  • Page 25 Operation 5.9.2 Primary Vector Select 5.9.3 Secondary Vector Select The available primary vectors are displayed below. Select a primary vector to proceed to the Secondary Secondary vector groups and phasing displayed are determined by the standard Vector selection screen. and primary vector selected. Secondary vectors are separated by group and by phasing.
  • Page 26 3. If no connection issues are detected, the vector found screen will be displayed. Select the con- firm button to accept the results of find vector. This will update the secondary vector to the found vector. TTRU3 User Manual us.megger.com...

  • Page 27: Regional

    Operation 5.9.8 Find Vector Buttons 5.10 Regional Regional settings will configure the TTRU3 instru- Button Description ment for a specific locale. Stop! Stop the test Emergency Stop recommended if safety hazards arise Retest Rerun the find vector test 5.10.1 Regional Options...

  • Page 28: Display

    PC to set the date and time in the PC application. 5.11.2 Display Buttons Option Availabe Settings Configure the date and time of the TTRU3 Calibrate Touch Screen 5.11.3 Calibrate Touch Screen Follow the directions on screen to calibrate the TTRU3.

  • Page 29: Oltc

    Operation 5.12.3 Tap Timing 5.12 OLTC Settings Use the provided tap changer cable and TTRU3 OLTC switch on the front panel to configure the Pulse and Optional SW Feature Wait times of the OLTC transition. 1. Press and hold TTRU3 OLTC tap changer switch on front panel (up or down) to start tap changer transition.

  • Page 30: Administrative Settings

    Export Folder 1 – 125V Step Up (ADV model) Test V 1 – 250V Step Up Restore Factory Settings (EXP / PRO model) Overwrite all Settings with factory settings 1 - 48V Step Down Predictive Taps TTRU3 User Manual us.megger.com...

  • Page 31: Test In Progress

    Operation 5.14.2 Quick Test Buttons 5.15 Test in Progress Options Available Settings Test Voltage Output Starts test Transformer Nameplate Set transformer settings After clicking Test, a prompt will appear to confirm the default Test ID if none was entered. If a Test ID was entered, or if the prompt is confirmed: 1.

  • Page 32: Test Failed

    Found to the left of vector Secondary Tap/Voltage 5.16.2 Test Failed Buttons Button Description From Test Setup Test Mode Test Voltage is voltage Test Voltage applied phase to phase Retest Ratio TNR/TTR Display View Results Display Return to Test Setup TTRU3 User Manual us.megger.com...
  • Page 33 Operation 5.17.2 Ø Information 5.17.3 Test Success Buttons Below the header is Ø information. If a single Ø test Button Description is run, only one row of results will be available. Ratio Display TNR/TTR Display Save Result Save and return to setup with new Test ID Export Result Exports to thumb drive,...

  • Page 34: Oltc Tap Change Home Screen

    Insert a thumb drive to export results. A brief progress bar followed by the screen below will be displayed after a successful export. The folder can be found in the root of the thumb drive. TTRU3 User Manual us.megger.com...
  • Page 35 Operation 5.18.1 OLTC Tap Change 5.18.2 Quick Test Setup Test Success Predictive Taps Predictive Taps allows you to quickly test a trans- Pressing the physical tap up or tap down button former with an OLTC, without having to set up a test while on the test success screen will display a noti- plan.

  • Page 36: New Test Plan

    First Tap V 1-999,999 Test Plan Results 1-999,999 Last Tap V View results for the Test Plan Only one winding can be OLTC Not required to run tests Options displayed based on Tap Labels & # Taps TTRU3 User Manual us.megger.com...
  • Page 37 Operation 5.19.4 Nameplate Buttons 5.19.7 Taps Options Option Available Settings Button Description Round Tap Voltages Add Tertiary Winding 5.19.5 Taps # OLTC Nominals 1 - 9 The Nameplate Taps screen is used to confirm and modify the tap labels and voltages for each winding. Initial tap labels and voltage values are based on the Tap Phase Shift selections in the Nameplate screen.
  • Page 38 Enter Asset Serial Number Enter Asset Year of Year Manufacture Substation Enter Substation Weight Unit Position Enter Position Unknown 3 leg Core Design 5 leg Coolant Volume Enter Coolant Volume Weight Enter Weight Job # Enter Job # TTRU3 User Manual us.megger.com...
  • Page 39 Operation 5.19.11 Conditions 5.19.14 Test Setup The Conditions screen is used to enter additional The Test Setup takes all previously entered Test Plan information about the conditions during the test. information and allows for organized and automated test execution. The Test Setup screen is similar to the Quick Test setup.

  • Page 40: Auto Oltc Test In Progress

    Settings Optional SW Feature Secondary Tertiary Only available if tertiary If the OLTC is set to Auto, the TTRU3 will added on Nameplate screen 1. Execute a test on the first tap List of taps determined by 2. Change the tap Nameplate/Taps screens 3.

  • Page 41: Test Failed

    Operation 5.20.3 Auto OLTC Test Flow 5.21 Test Failed The Auto OLTC Test Flow is shown below, and is valid A Test Failed screen will be displayed if the test can- while there are still additional taps to test not be executed successfully or the results exceeded testing limits 5.21.1 Test Failed Buttons Button...

  • Page 42: Test Plan Results

    Delete the individual result Change winding tap up or down Retest Tap Primary X-Axis Continue - Change Tap Secondary/Tertiary & Test Optional SW Feature ØC Phases Return to Test Setup ØB ØC Export the Test Plan Result TTRU3 User Manual us.megger.com...
  • Page 43 Operation 5.22.6 Test Plan Info 5.22.4 Results Summary The last view available for Test Plan is the Test Using the Physical Tap Changer Button will Summary. Test summary provides the vector tested, not update the tap displayed! It will only date &...

  • Page 44: Magnetic Balance Test Setup

    (ADV model) 1-250 V Step Up Test V (EX / PRO Model) 1 - 48 V Step Down 5.23.2 Magnetic Balance Test Buttons Options Available Settings Test Voltage Output Starts test Transformer Nameplate Set transformer settings TTRU3 User Manual us.megger.com...
  • Page 45 Operation 5.23.3 Magnetic Balance 5.23.4 Magnetic Balance Test Modes Test Success When a test completes successfully, the screen be- Magnetic Balance provides turns ratio low will be displayed. results and Magnetic Balance results. Magnetic Balance is always performed with 1Ø excitation During every test, low voltage (less than 1V) is ap- plied as a safety and connection test.
  • Page 46 2nd, 3rd, 4th rows Total Induced ØA, ØB, ØC Data Total voltage induced in the two Ø’s that were not excited. Voltage measured and percent of excited Ø voltage Will appear in red if exceeds % imbalance limit TTRU3 User Manual us.megger.com...
  • Page 47 Operation 5.23.7 Magnetic Balance 5.23.8 Possible Reasons Test Success Views for Imbalance and Suggested Tests Selecting the View button will change how and what when Imbalanced data is displayed. There are three possible views for the magnetic balance test. Possible reasons for imbalance is Magnetic Balance Table View informative only.

  • Page 48: Results

    The number of saved results that failed measurement details limits will show next to the warning icon. 5.24.2 Results Options Button Description Date Sort Type Vector # or Results Ascending Sort Order Descending Scroll through Scroll Bar available results TTRU3 User Manual us.megger.com...
  • Page 49 Periodically export all results and store lo- the action is intended. cally, preferably on a network with sched- uled backups. THE TTRU3 IS After deleting all results, the TTRU3 will return to the NOT INTENDED TO BE A PERMANENT Home screen. REPOSITORY FOR YOUR TEST DATA.
  • Page 50 Export result to thumb drive. Print Result Available if optional printer connected. Prints result Back Return to All Results Retest Retest with prompt to overwrite. Copy Test Copy Test Plan Setup with a new name and no results TTRU3 User Manual us.megger.com...

  • Page 51: Simulation Mode

    Cancel Discard new results and keep saved results 5.25 Simulation Mode After launching the TTRU3 PC SW, if no TTRU3 is 5.18.8 Overwrite Result detected, simulation mode will be available After retesting from a saved result, the TTRU3 will ask if the result should be overwritten.

  • Page 52: Powerdb 3Ø Form

    5.26.1 PowerDB Import from File PowerDB provides a 3Ø form for importing results and controlling the TTRU3 (as well as data from oth- To import data exported to a thumb drive, find the er Megger instruments). table where there data should be imported and select “Import TTRU3 Data”...
  • Page 53 GUI to import the result to the form. To import data directly from the TTRU3, first connect the TTRU3 to a PC with the supplied USB B cable. Find the table where the data should be imported and select “Import TTRU3 Data”...

  • Page 54: Service

    Check printer paper is inserted properly the TTRU3. • Check USB cable is plugged into printer • Check USB cable is plugged into TTRU3 USB port • Check that the power source is outputting volt- • Check printer is turned on by holding power age at acceptable levels and frequency.

  • Page 55: Maintenance

    Any service or repair of this equipment should The TTRU3 may be cleaned periodically. In so doing, be performed only by qualified persons who are do not allow water to penetrate panel holes. An...
  • Page 56 USA, UK, Germany and Sweden, Ground Resistance Test Equipment combined with sales and technical support in most countries, Megger is uniquely placed to meet the Insulation Power Factor (C&DF) Test Equipment needs of its customers worldwide. Insulation Resistance Test Equipment...

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