doble TDR900 User manual

PN 500-0652 72A-2612-01 Rev. A 09/06
Doble TDR900 User Guide
Doble Engineering Company
85 Walnut Street
Watertown, Massachusetts
02272-9107 (USA)
Telephone: [phone]
Fax: [phone]
www.doble.com

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NOTICE
This User Guide (the “User Guide”) is solely the property of the Doble Engineering Company
(Doble®) and, along with the subject matter to which it applies, is provided for the exclusive use
of Doble Users (the “User”) under contractual agreement for Doble®test equipment and services.
In no event does the Doble Engineering Company assume liability for any technical or editorial
errors of commission or omission; nor is Doble liable for direct, indirect, incidental, or
consequential damages arising out of reliance, inaccurate third party information or the inability
of the User to use this User Guide properly.
Copyright laws protect this User Guide; all rights are reserved. No part of this User Guide shall
be reproduced, stored in a retrieval system, or transmitted by any means, electronic, mechanical,
photocopying, recording, or otherwise without written permission from the Doble Engineering
Company.
Doble and the Doble logo are registered in the U.S. Patent and Trademark Office and are
trademarks of the Doble Engineering Company.
Doble®is providing the information contained herein for reference purposes only. Doble®makes
no warranty or representation that the User Guide will meet the User’s requirements. This User
Guide is intended to provide a basic understanding and general application of the principles set
forth herein. Comments contained herein relating to safety represent minimum guidelines, and
should never be compromised; however, it is foreseeable that the minimum safety guidelines
may be supplemented in order to conform to User’s company safety and compliance regulations.
User is responsible for applying the information contained herein in strict accordance with
industry as well as User’s company compliance and safety regulations. The techniques and
procedures described herein are based on years of experience with some tried and proven
methods. However, the basic recommendations contained herein cannot cover all test situations
and there may be instances when Doble®should be consulted directly. Doble® is not responsible
for the MISUSE OR RELIANCE ON THIS PUBLICATION; ANY OPINIONS CONTAINED
HEREIN OR AS A RESULT OF MODIFICATION BY ANYONE OTHER THAN DOBLE®
OR AN AUTHORIZED DOBLE REPRESENTATIVE.
THERE ARE NO WARRANTIES, EXPRESSED OR IMPLIED, MADE WITH RESPECT TO
THIS USER GUIDE INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. DOBLE®
EXPRESSLY DISCLAIMS ALL WARRANTIES NOT STATED HEREIN. IT IS
UNDERSTOOD THAT MUCH OF THIS INFORMATION (ALTHOUGH OWNED BY
DOBLE®) HAS BEEN COMPILED FROM OR CONVEYED BY THIRD PARTIES WHO IN
DOBLE’S REASONABLE ASSESSMENT ARE LEADING AUTHORITIES IN THE
INDUSTRY, ALTHOUGH DOBLE HAS REVIEWED THE INFORMATION WITH
REASONABLE CARE, THE VERACITY AND RELIABILITY OF THE INFORMATION
AND IT’S APPLICATION IS NOT ABSOLUTE. UNDER NO CIRCUMSTANCES WILL
DOBLE BE LIABLE TO USER OR ANY PARTY WHO RELIES IN THE INFORMATION

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FOR ANY DAMAGES, INCLUDING WITHOUT LIMITATION, PERSONAL INJURY OR
PROPERTY DAMAGE CAUSED BY THE USE OR APPLICATION OF THE
INFORMATION CONTAINED HEREIN, ANY INCIDENTAL OR CONSEQUENTIAL
DAMAGES, EXPENSES, LOST PROFITS, LOST SAVINGS, OR OTHER DAMAGES
ARISING OUT OF THE USE OF OR INABILITY TO USE THIS INFORMATION
SUCCESSFULLY.
Some states do not allow the limitation or exclusion of liability for incidental or consequential
damages, so the above limitation or exclusion may not apply.
©Copyright, 2006
By Doble Engineering Company
All Rights Reserved

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PREFACE
This User Guide describes how to use Doble Engineering’s T-Doble Software.
The purpose of this guide is to assist with application of the T-Doble software in testing current
breaking devices, such as Circuit Breakers.
Notes, Cautions and Warnings
Note, Caution and Warning icons denote information of special interest. Failure to observe a
caution or a warning could cause a dangerous condition.
Warning Symbol: The WARNING icon identifies information that denotes a potentially
hazardous condition; this condition may result in death or serious injury.
Ground Symbol: THE PROTECTIVE CONDUCTOR GROUND is the primary ground for
equipment protection.
.
Note Symbol: The NOTE icon signifies a cautionary statement, operating tip or
maintenance suggestion. Instrument damage may occur if the note is not
followed.
High Voltage Warning: The HIGH-VOLTAGE icon indicates a situation involving
hazardous voltage levels with risks of shock or injury.

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Table of Contents
Chapter 1 Introduction to the TDR900.................................................................................1
1.1 Aims of this Guide.....................................................................................................1
1.2 Timing Tests with the TDR900.................................................................................1
1.3 Terminology ..............................................................................................................1
1.4 Safety First.................................................................................................................2
Chapter 2 Parts List – Hardware and Software.........................................................................3
2.1 Instrument Overview.................................................................................................3
2.2 Front Panel Connections............................................................................................5
2.3 Basic Cables and Accessories....................................................................................5
2.3.1 Safety/Chassis Ground..............................................................................6
2.3.2 Safety Switch + Flag.................................................................................6
2.3.3 Fuses .........................................................................................................6
2.4 Software.....................................................................................................................6
2.5 Overall Test Cable Option (OCB – Dead tank).........................................................6
2.6 Sectional Test Cable Option (EHV – Live tank).......................................................7
2.7 Motion Option ...........................................................................................................7
2.8 Analog/Event Cable Option.......................................................................................8
Chapter 3 Safety and Personnel ...................................................................................................9
3.1 Safety.........................................................................................................................9
3.2 General Rules ............................................................................................................9
3.3 Grounding..................................................................................................................9
3.4 Personnel Safety......................................................................................................10
Chapter 4 ......................................................................................................................................11
Breaker Operation and Testing Theory ....................................................................................11
4.1 The Role of a Breaker..............................................................................................11
4.2 Breaker Characteristics............................................................................................11
4.3 How a Breaker Operates..........................................................................................12
4.4 Features of a Breaker...............................................................................................12
4.4.1 Tank ........................................................................................................12
4.4.2 Source of Energy.....................................................................................12
4.4.3 Arc Quench and Insulation .....................................................................13

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4.4.4 Breaks per Phase.....................................................................................13
4.4.5 Capacitors and Resistors.........................................................................13
4.4.6 Independent Pole Operation....................................................................13
4.5 Breaker Example .....................................................................................................14
4.6 Things That Can Go Wrong With a Breaker...........................................................14
4.7 Why Test a Breaker? ...............................................................................................15
4.8 Main Contact Timing Tests.....................................................................................15
4.8.1 Performing an Overall Test (OCB or dead tank)....................................16
4.8.2 Performing a Sectional Test (EHV or live tank).....................................16
4.8.3 Measuring Motion...................................................................................16
4.9 First Trip Tests.........................................................................................................17
4.10 Other Tests...............................................................................................................17
Chapter 5 Breaker Timing Tests with T-Doble: Overview......................................................19
5.1 General Set Up Information ....................................................................................19
5.2 Preparing the Breaker – Off-Line Tests ..................................................................19
5.3 Preparing the Breaker – On-Line Tests...................................................................20
5.4 Preparing the Doble TDR900 Instrument and PC...................................................20
5.5 Connect Test Leads to Breaker................................................................................21
5.5.1 Overall Test (Dead Tank or OCB test)...................................................21
5.5.2 Sectional Test (live Tank or EHV test)...................................................22
5.6 Install Motion Transducer .......................................................................................23
5.7 Perform a Test .........................................................................................................24
5.7.1 Pre-test Check List..................................................................................24
5.7.2 Running a Test........................................................................................25
5.8 Powering Down the Doble TDR900 Instrument.....................................................25
5.9 Closing the T-Doble Software.................................................................................25
Chapter 6 T-Doble Software Details..........................................................................................27
6.1 Introduction .............................................................................................................27
6.2 T-Doble Installation on a PC...................................................................................27
6.3 Running the Software..............................................................................................27
6.4 Dealing with Data: Test Plans and Test Results......................................................28
6.5 Software Organization.............................................................................................29
6.5.1 Chart Control – Zoom, Pan, Legends .....................................................29
6.5.2 Buttons....................................................................................................31
6.6 Software Main Tabs and Sub-tabs...........................................................................32

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6.6.1 Files.........................................................................................................32
6.6.2 Breaker....................................................................................................35
6.6.3 Test Plan..................................................................................................37
6.6.4 Test Results.............................................................................................44
6.6.5 Overlay Signals.......................................................................................54
6.6.6 Instruments..............................................................................................56
6.6.7 Reports....................................................................................................57
6.6.8 Preferences..............................................................................................58
6.6.9 Help.........................................................................................................59
6.7 Connect to a TDR900 Instrument............................................................................60
6.8 Running a Test.........................................................................................................63
6.9 Transferring Data between PC’s..............................................................................63
6.10 Closing the Software ...............................................................................................63
Chapter 7 Technical Support and Troubleshooting.................................................................65
7.1 PC ............................................................................................................................65
7.2 Installing Software on a PC.....................................................................................65
7.3 Checking Communication between PC and TDR900.............................................65
7.4 Field Repairs............................................................................................................66
7.5 Parts List..................................................................................................................66

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List of Figures
Figure 1. TDR900 Test Set and Basic Cables................................................................................. 3
Figure 2. TDR900 Instrument Front View ..................................................................................... 4
Figure 3. Schematic of Front Panel Connections............................................................................ 5
Figure 4. Safety Ground.................................................................................................................. 6
Figure 5. TDR900 OCB Connection .............................................................................................. 7
Figure 6. TDR900 EHV Connections: two sets of three ................................................................ 7
Figure 7. TDR900 Motion Connections ......................................................................................... 7
Figure 8. TDR900 Analog/Event Connections............................................................................... 8
Figure 9. Connecting Safety Ground to Breaker .......................................................................... 10
Figure 10. Grounding the Breaker before Tests............................................................................ 20
Figure 11. General Control Schematic.......................................................................................... 21
Figure 12. Contact Monitor Cable for Overall Test...................................................................... 22
Figure 13. Cable Arrangement for Sectional Test for One Phase................................................ 23
Figure 14. Locating a standard Rotary/Linear Transducer........................................................... 24
Figure 15. “Run Test” Selection from a List ................................................................................ 25
Figure 16. T-Doble Software Start Up Screen.............................................................................. 28
Figure 17. T-Doble Initial Screen: Files....................................................................................... 28
Figure 18. Test Results Legend .................................................................................................... 30
Figure 19. Using the Legend to Manage Traces........................................................................... 31
Figure 20. Browse Files................................................................................................................ 33
Figure 21. Sorting Files by Manufacturer..................................................................................... 34
Figure 22. Recently Opened Files................................................................................................. 34
Figure 23. Breaker Tab - Nameplate Sub-Tab.............................................................................. 35
Figure 24. Breaker – Timing Limits Sub-tab................................................................................ 36
Figure 25. Breaker – Travel Limits Sub-tab................................................................................. 36
Figure 26. Breaker – Velocity Limits Sub-tab.............................................................................. 37
Figure 27. Test Plan – Test Setup Sub-tab.................................................................................... 38
Figure 28. Test Plan –Main Contact Channels Sub-tab – Default................................................ 39
Figure 29. Test Plan –Main Contact Channels Sub-tab – OCB Selected..................................... 39
Figure 30. Test Plan –Main Contact Channels Sub-tab – EHV Selected..................................... 40
Figure 31. Test Plan – Other Channels Sub-tab............................................................................ 41
Figure 32. Test Plan – Timing Event Sub-tab............................................................................... 41
Figure 33. Timing Event Selection.............................................................................................. 42
Figure 34. Test Plan – Special Tests Sub-tab ............................................................................... 43
Figure 35. Test Plan Notes Sub-tab .............................................................................................. 44
Figure 36. Test Results – Signals sub-tab..................................................................................... 45
Figure 37. Test Results – Main Contacts Sub-tab......................................................................... 46
Figure 38. Symbols for “OK” and “Investigate:........................................................................... 46
Figure 39. Test Results showing “Investigate” for Close Results................................................ 47
Figure 40. Test Results – Resistor Contacts Sub-tab.................................................................... 48
Figure 41. Test Results – Motion Sub-tab.................................................................................... 49
Figure 42. Test Results – Motion at Main Open-Close Sub-tab................................................... 50
Figure 43. Test Results – Motion at Resistor Open-Close............................................................ 51
Figure 44. Test Results – Other Channels Sub-tab....................................................................... 52

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Figure 45. Test Results – Notes Sub-tab....................................................................................... 53
Figure 46. Overlay Signals Tab – Default Setup.......................................................................... 54
Figure 47. Overlay Tab with Single Result Added....................................................................... 55
Figure 48. Overlay Tab Legend – Check Box and Red Button.................................................... 55
Figure 49. Overlay Tab with Two Results Added........................................................................ 56
Figure 50. Instruments Tab........................................................................................................... 57
Figure 51. Reports Tab ................................................................................................................. 57
Figure 52. Preferences – Display Units Sub-tab........................................................................... 58
Figure 53. Preferences – Plotting Sub-tab .................................................................................... 58
Figure 54. Preference - Files......................................................................................................... 59
Figure 55. Help Tab...................................................................................................................... 59
Figure 56. “Instruments” tab to connect PC to TDR900.............................................................. 60
Figure 57. No TDR900 instrument found..................................................................................... 61
Figure 58. Instruments Tab: Connect to TDR900 ........................................................................ 62
Figure 59. No instrument selected................................................................................................ 63

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List of Tables
Table 1. Minimum PC Requirements .......................................................................................... 65
Table 2. Parts List......................................................................................................................... 66

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Chapter 1
Introduction to the TDR900
1.1 Aims of this Guide
This User Guide explains how to make breaker timing tests with the Doble TDR900 and
accompanying T-Doble software. It mainly relates to the T-Doble software and its use.
This guide is not a training guide in the practice of breaker testing; it is assumed the user
has basic competence when it comes to testing breakers. A Doble training course in
breaker timing would be a good way to become familiar with the concepts and
fundamentals of breaker testing.
Note: The actual connections made for a breaker test are specific to each type of breaker
tested. It is important that a user with knowledge of the breaker make the
connections for testing so as to avoid possible damage to the breaker or the
TDR900 test set.
1.2 Timing Tests with the TDR900
This guide allows the user to perform timing tests with the TDR900 test set. Most users
will be testing circuit breakers. However, there is no reason why the user cannot use the
same test set to time circuit switches, LTC contacts or other devices.
For simplicity this guide refers to breaker timing throughout.
1.3 Terminology
There are many different terms and names used for testing breakers: OCB tests, EHV,
live tank tests, first trip tests and so on. There is no international standard for
terminology.
To maintain a uniform approach we have adopted the following naming conventions in
this guide:
Overall test: This is also called a dead tank test, and OCB test. This is a test of a
breaker from end-to-end on any phase. Connections are at the input
terminal to that phase and the output terminal from that phase. It does not
matter how many breaks per phase there are, the test is end-to-end on each
phase.

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Sectional test: Sometimes called a live tank test or an EHV test. This is a test which
looks at individual breaks per phase. Each individual moving second of
the breaker can be timed separately.
Off-line test: Off line is the usual state for a breaker to be in when performing a breaker
timing test; connections can be made at line terminals. Appropriate safety
precautions should have been taken to ensure safety of personnel and
equipment. Safety documentation should be in place authorizing the tests
to be performed.
On-line test: The breaker is energized and/or carrying load when it operates. Do not
make any connections to any line terminal as system voltages appear on
those terminals. A “First trip” test requires the breaker be energized when
it trips.
Motion: Motion is measured through a transducer; this is a record of the movement
of the mechanical part of the breaker as it opens or closes the breaker; also
called travel. Motion can be used to give the velocity of the breaker’s
moving parts.
1.4 Safety First
Safety of personnel, breaker and test equipment is of paramount importance when
performing any sort of timing test.
Please be sure to read and follow the safety instructions pertinent to your location before
making any connections or performing any tests.
Safety is discussed in more detail in Section 3.1.
.

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Chapter 2
Parts List – Hardware and Software
2.1 Instrument Overview
The TDR900 Instrument comes complete with packaged hardware, software, and cables
as shown in Figure 1. This section provides an introduction to the various parts and
accessories that comprise the Doble TDR900 Instrument.
Figure 1. TDR900 Test Set and Basic Cables
The TDR900 instrument measures and records breaker, switch and relay timing
parameters. It accomplishes this using the hardware components packaged in a rugged
field instrument, as shown in Figure 2.

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Figure 2. TDR900 Instrument Front View

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2.2 Front Panel Connections
Figure 3 gives a schematic view of the front panel connections on the TDR900.
Figure 3. Schematic of Front Panel Connections
2.3 Basic Cables and Accessories
The TDR900 comes with basic cables to allow communication with the PC, safety
grounding and control.

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2.3.1 Safety/Chassis Ground
Grounding of signal cable shields, specimen, and instrument chassis is important to
ensure safety.
Figure 4. Safety Ground
The Safety Ground, also known as the instrument Chassis Ground, shown in Figure 4, is
used to connect the instrument chassis to the ground of the transformer.
2.3.2 Safety Switch + Flag
The safety switch and safety flag allow the software to actually run a test.
2.3.3 Fuses
The TDR900 uses a 3-amp fast blow fuse as indicated on the panel and instrument label.
2.4 Software
Software to control the TDR900 must be run on a PC; the PC is connected to the
TDR900 via a USB cable or an Ethernet cable.
2.5 Overall Test Cable Option (OCB – Dead tank)
This cable option allows for an overall test (also known as an OCB or dead tank test) on a
breaker. This test makes one timing measurement per phase: first break (on and open or
trip) and last make (on a close). The OCB cable is one per breaker spanning all three
phases simultaneously.

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Figure 5. TDR900 OCB Connection
2.6 Sectional Test Cable Option (EHV – Live tank)
This cable option allows for a sectional test (also known as an EHV or a Live tank test)
on a breaker and measures each contact independently for multiple breaks per phase. The
EHV cables are one per phase, each spanning two breaks.
Figure 6. TDR900 EHV Connections: two sets of three
2.7 Motion Option
The Motion option allows for a motion (travel) measurement on a breaker. A transducer
is needed to introduce the motion measurement to the TDR900.
Figure 7. TDR900 Motion Connections
OCB test Connection

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2.8 Analog/Event Cable Option
The Analog and Event Cables allow for measurements using external sensors. Event
channels are also called Auxiliary channels. This is where an analog sensor, such as a clip
on CT would be connected.
Figure 8. TDR900 Analog/Event Connections