Vanguard Tri-Phase User Manual
OPERATING INSTRUCTIONS
For
TRI-PHASE™
True Three-Phase Transformer Turns-Ratio Tester
Vanguard Instruments Co., Inc.
TEL: 909-923-9390 October 2008
FAX: 909-923-9391 REV. 01
.
1520 S. Hellman Ave.
Ontario, California 91761, USA
TRI-PHASE OPERATING™ INSTRUCTIONS
SAFETY WARNINGS AND CAUTIONS
Only trained operators shall use this device.
All transformers under test shall be off line and fully isolated.
Always ground the TRI-PHASE™ to a substation ground before connecting the test cables to
a transformer
Do Not Modify Test Equipment
Because of the risk of introducing unknown hazards, do not install substitute parts or perform any
unauthorized modifications to any TRI-PHASE™ test device. To ensure that all designed safety
features are maintained it is recommended that repairs be performed only by Vanguard Instruments
Co. factory personnel or by an authorized repair service. Unauthorized modifications will cause
serious safety hazards and will nullify the manufacturer's warranty.
Follow Exact Operating Procedures
Any deviation from the procedures described in this operator’s manual may create safety hazards,
damage the TRI-PHASE™ test device or cause errors in the test results. Vanguard Instruments Co.,
Inc. assumes no liability for unsafe or improper use of the TRI-PHASE™.
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TRI-PHASE OPERATING™ INSTRUCTIONS
Table of Contents
1.0 Introduction...........................................................................................................................10
1.1 Applicability.......................................................................................................................10
2.0 General Description...............................................................................................................10
3.0 Functional Description..........................................................................................................11
4.0 Principles of Operation..........................................................................................................12
5.0 Specifications ........................................................................................................................13
6.0 Supplied Cables.....................................................................................................................14
6.1 Cable Marking and Identification ......................................................................................15
7.0 TRI-PHASE™ Front Panel Descriptions..............................................................................16
7.1 TRI-PHASE™ Operating Controls, Indicators and Connectors........................................16
8.0 TRI-PHASE™ Printer and Printer Paper..............................................................................18
9.0 Memory Storage Capabilities................................................................................................18
9.1 Test Record Memory Storage Capabilities ........................................................................18
9.2 Transformer Test Plan Memory Storage Capabilities........................................................18
10.0 Operating Voltages................................................................................................................18
10.1 Operating Voltages.............................................................................................................18
11.0 Special Features.....................................................................................................................19
11.1 LCD Contrast Control........................................................................................................19
11.2 Test Voltages......................................................................................................................19
11.3 Computer Control And TTRA Software Application........................................................19
11.4 USB FLASH Memory Thumb Drive.................................................................................19
12.0 Typical Cable Hook Up Configurations................................................................................20
12.1 Typical Cable Connections to a Delta-Wye Transformer..................................................20
12.3 Single Phase Transformer Typical Connections................................................................22
12.4 Voltage Regulator Typical Connections ............................................................................23
12.5 Donut Type (un-mounted) Current Transformer (CT) Typical Connections ....................24
12.6 Multi-tap CT Typical Connections ....................................................................................25
12.7 Bushing-Mount-CT on A Single Phase Transformer Typical Connections ......................25
12.8 Bushing Mount CT’s on Delta Transformer Typical Connections....................................26
12.9 Bushing Mount CT’s on Wye Transformer Typical Connection.......................................27
13.0 Single-Phase Transformer Test Procedure............................................................................28
13.1 Main Menu.........................................................................................................................31
13.2 Transformer Configuration Selection Menu ......................................................................32
13.3 Transformer Name Plate Voltage Menu ............................................................................33
13.4 Transformer Voltage Data Entry Status Displays..............................................................34
13.5 Start/Stop Test Status Display............................................................................................35
13.6 Test In Progress Status Display..........................................................................................36
13.7 Test Results Status Display................................................................................................37
13.8 Print Test Results Menu.....................................................................................................38
13.9 Print Format Menu.............................................................................................................38
13.10 Test Result Column Format Printout .................................................................................40
13.11 Test Result Detail Format Printout.....................................................................................41
13.12 Keep This Reading Menu...................................................................................................43
13.13 Previous Data In Buf. Menu...............................................................................................44
13.14 Run Another Test Menu.....................................................................................................45
13.15 Save This Record Menu.....................................................................................................46
13.16 Record Saved Confirmation Status....................................................................................47
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TRI-PHASE OPERATING™ INSTRUCTIONS
13.17 Transformer Name Plate Voltage Menu For Another Test................................................48
13.18 Test Record Not Saved Menu ............................................................................................49
14.0 Dyn1 Transformer Test Procedure........................................................................................50
14.1 Delta-To-Wye (Dyn) Transformer Test Column Format Printout.....................................53
14.2 Delta-To-Wye Transformer Test Detail Format Printout...................................................55
15.0 Auto Detect Transformer Configuration Capability .............................................................58
16.0 Test Record Options..............................................................................................................59
16.1 Restore A Test Record To Print Procedure........................................................................59
16.2 Setup Menu ........................................................................................................................61
16.3 Save/Restore Record Menu................................................................................................62
16.4 Restore Record Menu.........................................................................................................63
16.5 Restore Record Number Status Display.............................................................................64
16.6 Record Restored Menu.......................................................................................................65
16.7 Print Record To LCD Or Printer Menu..............................................................................66
16.8 Print Format Menu.............................................................................................................67
16.9 Test Record Printout Column Format................................................................................68
16.10 Test Record Printout Detailed Format ...............................................................................69
16.11 Save Test Results To A Test Record Procedure ................................................................71
16.12 Print Test Record Directory ...............................................................................................72
16.13 Print Directory Menu .........................................................................................................73
16.14 Record Directory Printout..................................................................................................74
16.15 Restore Test Record To LCD Procedure............................................................................75
16.16 Scroll Test Record Menu....................................................................................................77
16.17 Restored Record Status Display.........................................................................................78
16.18 Record Restored Menu.......................................................................................................79
16.19 Print Record Restored Menu..............................................................................................80
16.20 Restored Record Status Displays .......................................................................................81
16.21 Erase A Test Record Procedure .........................................................................................82
16.22 Erase Record Menu............................................................................................................83
16.23 Erase Record Status Display..............................................................................................84
16.24 Record Number Erased Confirmation Status Display........................................................85
16.25 Erase All Test Records Procedure......................................................................................86
16.26 Erase All Records Status Display.......................................................................................87
16.27 Record Number Erased Confirmation Status Display........................................................88
17.0 Test Plan Options..................................................................................................................89
17.1 Load a Test Plan and Test a Transformer Procedure .........................................................89
17.2 Test Plan Menu...................................................................................................................92
17.3 Load Test Plan Number Status Display .............................................................................93
17.4 Test Plan Loaded Menu......................................................................................................94
17.5 Test Plan Loaded Status Display........................................................................................95
17.6 Test Plan Test Results Status Display................................................................................96
17.7 Print Test Plan Test Results ...............................................................................................97
17.8 Test Plan Test Results Printout ..........................................................................................98
17.9 Unload a Test Plan Procedure............................................................................................99
17.10 Print Test Plan Directory Procedure.................................................................................100
17.11 Test Plan Directory Print Out...........................................................................................101
17.12 Print Test Plan Procedure.................................................................................................102
17.13 Print Test Plan Status Display..........................................................................................103
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TRI-PHASE OPERATING™ INSTRUCTIONS
17.14 Typical Three Phase Dyn1 Test Plan Printout.................................................................104
17.15 Erase A Test Plan Procedure............................................................................................105
17.16 Erase Test Plan Menu.......................................................................................................106
17.17 Erase Test Plan Status Display.........................................................................................107
17.18 Test Plan Number Erased Confirmation Status Display..................................................108
18.0 Entering Test Record Identification Information Procedure...............................................109
19.0 Test Voltage Selection Procedure .......................................................................................111
19.1 Test Voltage Selection .....................................................................................................112
20.0 Test Frequency Selection Procedure...................................................................................113
20.1 Test Frequency Selection .................................................................................................114
21.0 Change Date And Time Procedure......................................................................................115
21.1 Enter Date Status Display ................................................................................................116
21.2 Enter Time Status Display................................................................................................117
22.0 H And X Cable Diagnostic Test Procedure.........................................................................118
23.0 TRI-PHASE™ Verification Test Procedure .......................................................................119
24.0 Load Tap Changer...............................................................................................................120
25.0 USB FLASH Thumb Drive .................................................................................................121
25.1 Save/Restore Record With Thumb Drive Menu..............................................................121
25.2 Copy Record To Thumb Drive Menu..............................................................................122
25.3 Copy Single Record To Thumb Drive Status Displays....................................................123
25.4 Copy All Records To Thumb Drive Status Displays.......................................................124
25.5 Test Plan With Thumb Drive Menu.................................................................................125
25.6 Copy Test Plan To Thumb Drive Status Display.............................................................126
25.7 Test Plan Saved To Thumb Drive Confirmation Status Displays....................................127
25.8 Load Test Plan With Thumb Drive Menu........................................................................128
25.9 Load Thumb Drive Test Plan Status Displays.................................................................129
25.10 Print Test Plan Directory With Thumb Drive Menu........................................................130
25.11 Print Test Plan With Thumb Drive Menu........................................................................131
25.12 Print Thumb Drive Test Plan Status Displays..................................................................132
25.13 Erase Test Plan With Thumb Drive Menu.......................................................................133
25.14 Erase Thumb Drive Test Plan Status Displays.................................................................134
25.15 Save Test Plan With Thumb Drive Menu........................................................................135
26.0 Computer Interface Description..........................................................................................136
26.1 Computer Interface Status Display ..................................................................................136
26.2 Emergency Turn Off Switch............................................................................................137
27.0 TRI-PHASE™ Firmware Programming Notes...................................................................138
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TRI-PHASE OPERATING™ INSTRUCTIONS
List of Tables
Table 1.0 TRI-PHASE™ Turns-Ratio Meter Specifications.........................................................13
Table 2.0 Supplied Cable Set.........................................................................................................14
Table 3.0 Cable Markings and Identification.................................................................................15
Table 4.0 Model TRI-PHASE™ Front-Panel Controls, Indicators, and Connectors ....................17
Table 5.0 Single-Phase Transformer Test Procedure.....................................................................28
Table 6.0 Dyn1 Transformer Test Procedure.................................................................................50
Table 7.0 Restore A Test Record To Print Procedure....................................................................59
Table 8.0 Save Test Results To A Test Record Procedure ............................................................71
Table 9.0 Print Test Record Directory Procedure..........................................................................72
Table 10.0 Restore Test Record To LCD Procedure....................................................................75
Table 11.0 Erase A Test Record Procedure .................................................................................82
Table 12.0 Erase All Test Records Procedure..............................................................................86
Table 13.0 Load a Test Plan and Test a Transformer Procedure.................................................89
Table 14.0 Unload A Test Plan Procedure...................................................................................99
Table 15.0 Print Test Plan Directory Procedure.........................................................................100
Table 16.0 Print Test Plan Procedure.........................................................................................102
Table 17.0 Erase A Test Plan Procedure....................................................................................105
Table 18.0 Entering Test Record Identification Information Procedure....................................109
Table 19.0 Transformer Test Voltage Selection Procedure.......................................................111
Table 20.0 Transformer Test Frequency Selection Procedure...................................................113
Table 21.0 Change Date and Time Procedure............................................................................115
Table 22.0 H And X Cable Diagnostic Test Procedure..............................................................118
Table 23.0 TRI-PHASE™ Verification Test Procedure............................................................119
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TRI-PHASE OPERATING™ INSTRUCTIONS
List of Figures
Figure 1.0 Model TRI-PHASE™ Front-Panel Controls, Indicators and Connectors..............................16
Figure 2.0 Typical H & X Cable Connections to a Delta-Wye Transformer ..........................................20
Figure 3.0 Typical Front Panel Cable Connectors...................................................................................21
Figure 4.0 Typical H & X Cable Connections to Delta-Wye Transformer .............................................21
Figure 5.0 Single Phase Transformer Typical Connections ....................................................................22
Figure 6.0 Single Phase Auto Transformer Typical Connections ...........................................................22
Figure 7.0 Type A Voltage Regulator Typical Connections ...................................................................23
Figure 8.0 Type B Voltage Regulator Typical Connections....................................................................23
Figure 9.0 Donut Type (un-mounted) Current Transformer (CT) Typical Connections........................24
Figure 10.0 Multi-tap CT Typical Connections.........................................................................................25
Figure 11.0 Bushing-Mount-CT on A Single Phase Transformer Typical Connections...........................25
Figure 12.0 Bushing Mount CT’s on Delta Transformer Typical Connections ........................................26
Figure 13.0 Bushing Mount CT’s on Wye Transformer Typical Connection ...........................................27
Figure 14.0 Main Menu .............................................................................................................................31
Figure 15.0 Transformer Configuration Selection First Menu ..................................................................32
Figure 16.0 Transformer Configuration Selection Second Menu..............................................................32
Figure 17.0 Transformer Nameplate Voltage Menu..................................................................................33
Figure 18.0 Name Plate Voltage Status Display........................................................................................34
Figure 19.0 Name Plate Voltage Display, H Voltage Keyed In ................................................................34
Figure 20.0 Name Plate Voltage Display, H Voltage Entered...................................................................34
Figure 21.0 Name Plate Voltage Display, X Voltage Keyed In ................................................................34
Figure 22.0 Start/Stop Test Status Display................................................................................................35
Figure 23.0 Test In Progress Status Display..............................................................................................36
Figure 24.0 Test Results Status Display ....................................................................................................37
Figure 25.0 Print Test Results Menu .........................................................................................................38
Figure 26.0 Print Format Menu .................................................................................................................38
Figure 27.0 Single Phase Column Format Printout ...................................................................................40
Figure 28.0 Single Phase Detail Format Printout ......................................................................................41
Figure 29.0 Keep This Reading Menu.......................................................................................................43
Figure 30.0 Previous Data In Buf Menu....................................................................................................44
Figure 31.0 Run Another Test Menu .........................................................................................................45
Figure 32.0 Save This Record Menu .........................................................................................................46
Figure 33.0 Record Saved Confirmation Status Display ...........................................................................47
Figure 34.0 Nameplate Voltage Selection Menu For Another Test...........................................................48
Figure 35.0 Test Record Not Saved Menu......................................................................................... ........49
Figure 36.0 Dyn1 Column Format Printout...............................................................................................53
Figure 37.0 Dyn1 Detail Format Printout..................................................................................................55
Figure 38.0 Setup Menu.............................................................................................................................61
Figure 39.0 Save/Restore Record Menu ....................................................................................................62
Figure 40.0 Restore Record Menu.............................................................................................................63
Figure 41.0 Restore Record Number Status Display .................................................................................64
Figure 42.0 Record Restored Menu...........................................................................................................65
Figure 43.0 Print Record Menu .................................................................................................................66
Figure 44.0 Print Format Menu .................................................................................................................67
Figure 45.0 Test Record Printout Column Format ....................................................................................68
Figure 46.0 Test Record Printout Detailed Format....................................................................................69
Figure 47.0 Print Directory Menu..............................................................................................................73
Figure 48.0 Record Directory Printout ......................................................................................................74
Figure 49.0 Scroll Test Record Menu........................................................................................................77
Figure 50.0 Restored Record Status Display .............................................................................................78
Figure 51.0 Record Restored Menu...........................................................................................................79
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TRI-PHASE OPERATING™ INSTRUCTIONS
Figure 52.0 Print Record Restored Menu ..................................................................................................80
Figure 53.0 Restored Record First Status Display.....................................................................................81
Figure 54.0 Restored Record Second Status Display ................................................................................81
Figure 55.0 Erase Record Menu ................................................................................................................83
Figure 56.0 Erase Record Status Display ..................................................................................................84
Figure 57.0 Record Number Erased Status Display ..................................................................................85
Figure 58.0 Erase All Records Status Display...........................................................................................87
Figure 59.0 Records Erased Status Display...............................................................................................88
Figure 60.0 Test Plan Menu.......................................................................................................................92
Figure 61.0 Load Test Plan Number Status Display..................................................................................93
Figure 62.0 Test Plan Loaded Menu..........................................................................................................94
Figure 63.0 Test Plan Loaded Status Display............................................................................................95
Figure 64.0 Test Plan Test Results Status Display ....................................................................................96
Figure 65.0 Test Plan Test Results Printout Column Format ....................................................................98
Figure 66.0 Test Plan Directory Print Out...............................................................................................101
Figure 67.0 Print Test Plan Status Display ..............................................................................................103
Figure 68.0 Typical Three Phase Dyn1 Test Plan Printout......................................................................104
Figure 69.0 Erase Test Plan Menu...........................................................................................................106
Figure 70.0 Erase Test Plan Status Display.............................................................................................107
Figure 71.0 Test Plan Number Erased Status Display.............................................................................108
Figure 72.0 Test Voltage Selection Menu ...............................................................................................112
Figure 73.0 Test Frequency Selection Menu ...........................................................................................114
Figure 74.0 Enter Date Status Display.....................................................................................................116
Figure 75.0 Enter Time Status Display....................................................................................................117
Figure 76.0 Load Tap Changer Controller...............................................................................................120
Figure 77.0 Save/Restore Record With Thumb Drive Menu...................................................................121
Figure 78.0 Copy Record To Thumb Drive Menu...................................................................................122
Figure 79.0 Copy Single Record To Thumb Drive Status Displays........................................................123
Figure 80.0 Copy All Records To Thumb Drive Status Displays ...........................................................124
Figure 81.0 Test Plan With Thumb Drive Menu ..................................................................................... 125
Figure 82.0 Copy Test Plan To Thumb Drive Status Display .................................................................126
Figure 83.0 Test Plan Saved To Thumb Drive Confirmation Status Displays ........................................127
Figure 84.0 Load Test Plan Number With Thumb Drive Menu..............................................................128
Figure 85.0 Load Thumb Drive Test Plan Status Displays......................................................................129
Figure 86.0 Print Test Plan Directory With Thumb Drive Menu ............................................................130
Figure 87.0 Print Test Plan With Thumb Drive Menu ............................................................................131
Figure 88.0 Print Thumb Drive Test Plan Status Displays......................................................................132
Figure 89.0 Erase Test Plan With Thumb Drive Menu ...........................................................................133
Figure 90.0 Erase Thumb Drive Test Plan Status Displays.....................................................................134
Figure 91.0 Save Test Plan With Thumb Drive Menu ............................................................................135
Figure 92.0 Computer Interface Status Display.......................................................................................136
Figure 93.0 Computer Interface Status Display.......................................................................................137
Figure 94.0 Firmware Revision Menu 1..................................................................................................138
Figure 95.0 Firmware Revision Menu 2..................................................................................................139
Figure 96.0 Firmware Revision Menu 3..................................................................................................139
Figure 97.0 Firmware Revision Menu 3..................................................................................................139
Figure 98.0 Firmware Revision Menu 4..................................................................................................140
Figure 99.0 Firmware Revision Menu 5..................................................................................................140
Figure 100.0 Firmware Revision Menu 6..........................................................................................
....140
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TRI-PHASE OPERATING™ INSTRUCTIONS
List of Appendicies
APPENDIX A .................................................................................................................................141
APPENDIX B .................................................................................................................................142
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TRI-PHASE OPERATING™ INSTRUCTIONS
1.0 Introduction
1.1 Applicability
This manual is applicable to the True Three-Phase Transformer Turns-Ratio (TRI-PHASE™)
Tester model made by Vanguard Instruments Company, Inc.
2.0 General Description
The TRI-PHASE™ is a true three-phase, field-portable, automatic transformer turns-ratio test
instrument designed to conform to IEEE C57.12.90 measurement method. The TRI-PHASE™ is
designed for on-site measurement of turns-ratios, winding polarity, phase angles, and no-load
excitation currents of single phase and three-phase utility transformers, potential transformers
(PT's), and primary current transformers (CT's)
Since the TRI-PHASE™ is capable of outputting a true three-phase excitation test voltage (for
testing three-phase transformers), it can easily measure turns-ratios and phase angles of Zig-Zag, T
type, special configuration, and phase shifting transformers.
A built-in Load Tap Changer (LTC) controller provides the capability to raise or lower the LTC tap
position from the TRI-PHASE™ front panel.
The TRI-PHASE™ can be controlled from the front panel keypad (Stand Alone Mode) or in
Computer Control Mode with an IBM compatible Personal Computer (PC) via the Universal Serial
Bus (USB) port or RS-232C port.
The TRI-PHASE™ is supplied with single phase and three-phase hook-up cables, LTC control
cables, an RS232 serial cable, a USB cable, and a Microsoft Windows™ based PC Transformer
Turns Ratio Analyzer (TTRA) software application.
The TTRA software is provided on a compact disk along with the unit. New released TTRA
software and TRI-PHASE™ firmware are available to all users on the Vanguard Instruments web
site (www.vanguard-instruments.com).
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TRI-PHASE OPERATING™ INSTRUCTIONS
3.0 Functional Description
The TRI-PHASE™ measures a transformer turns-ratio from its windings by applying a 3-phase test
voltage across the primary (H) winding and sensing the induced voltage on the secondary (X)
winding. The measured voltage ratio between H and X is virtually the same as the turns-ratio of the
windings because of no load on the windings during testing. The TRI-PHASE™ is capable of
testing either single phase or three phase transformers. The need to change test leads to test each
phase on three phase transformers is eliminated using the three-phase cables. The TRI-PHASE™
will automatically test each phase of the transformer. The TRI-PHASE™ also has the following
features:
• Capable of testing with 3 test voltages; 8Vac, 40Vac, and 100Vac.
• Capable of testing three-phase transformers in Delta, Wye, Zig-Zag, and T type
configurations.
• Capable of displaying transformer phase angle relationships between primary and secondary
windings.
• Capable of automatically detecting and testing 130 three-phase transformer types defined by
ANSI, CEI/IEC and Australian standards. Refer to appendix B for the different transformer
configurations.
• Capable of testing phase-shifting transformer turns-ratios and displaying phase shift angles.
• Capable of performing test cable hook-up error checks before each test and automatically
aborting the test when there is an error.
• Capable of calculating the transformer turns-ratio based on the operator data entry of the
transformer nameplate voltages.
• Capable of calculating the percentage error based on the difference between the calculated
and measured turns-ratio values.
• Capable of saving transformer test result(s) in the on-board FLASH EEPROM. The test
result data consists of H and X nameplate voltages, phase A/B/C turns-ratios, excitation
current and phase angle measurements.
• Capable of storing a total of 112 test records in the on-board FLASH EEPROM. A test
record may contain up to 33 tests. Stored test records may be recalled, printed or transferred
to an IBM compatible PC with the built-in RS-232C port or USB interface port.
• Capable of storing up to 128 test plans in the on-board FLASH EEPROM. A test plan
provides the capability to store transformer nameplate voltages.
• Capable of printing “PASS” or “FAIL” test results of each of the transformer tests.
• Capable of storing test records and transformer test plans to an external FLASH memory
drive via the built-in USB FLASH memory thumb drive interface.
• Capable of printing test reports with a built-in 4.5-inch wide thermal printer.
• Capable of alpha-numeric input with the 16-key, alpha-numeric keypad.
• Capable of menu and submenu selection with either the alpha-numeric input or with a rotary
switch knob control.
• Capable of displaying data entry, menus, test results, and status readouts with the Liquid
Crystal Display (LCD) 64 by 128 dot graphic, back-lighted, sunlight readable display.
• Users can retrieve test records, review test records, and create test plans. Under computer
control operation with the supplied Transformer Turns-Ratio Analyzer (TTRA) software
application, the TTRA software application allows the user to perform a transformer turns
ratio test and saves the test results directly to a compatible IBM PC. The test data is stored in
ASCII format for database compatibility.
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TRI-PHASE OPERATING™ INSTRUCTIONS
3.0 Functional Description (continued)
• The TTRA software application is compatible with Microsoft Windows XP, and Microsoft
Windows Vista (see section
11.3 for more details).
• Capable of raising or lowering the Load Tap Changer (LTC) tap position from the TRI-
PHASE™ front panel with the built-in LTC controller (see section
24.0 for more details).
4.0 Principles of Operation
The TRI-PHASE™ measures transformer turns-ratios (using the ANSI/IEEE C57.12.90 method) by
applying a test voltage across the primary (H) winding and sensing the induced voltage on the
secondary (X) side. For safety, testing is always done in a step-down transfer, regardless of the
transformer’s actual use. Since there is no load on the windings during testing, the measured voltage
ratio is virtually the same as the winding turns-ratio.
The TRI-PHASE™ checks for test cable hook-up errors before each test. It applies a low-level test
voltage (300 mV) across the winding being tested and senses the induced secondary voltage. If the
induced voltage is greater than the applied excitation voltage, a hookup error is assumed. If a
connection error is detected, the TRI-PHASE™ aborts the test and displays “Hook-Up Error” on the
LCD. If no hookup error is detected, the TRI-PHASE™ applies a full test voltage to the transformer
winding being tested and the turns-ratio (or voltage ratio) is displayed on the LCD.
The winding polarity and phase-angle are determined by comparing the induced voltage waveform
to the test voltage waveform (which is used as the reference). In-phase waveforms (+) measure a
phase angle centered about 0 degrees. Out-of-phase waveforms (−) measure a phase angle centered
about 180 degrees.
The TRI-PHASE™ measures turns-ratios in the range from 0.8 to 15,000. Excitation current
(flowing in the H leads) is measured for reference and ranges from 0 to 2,000mA. Winding polarity
is displayed as a “+” or “−”sign in front of the measured ratio. The phase angle is measured in
degrees with a resolution of ±0.2 degrees.
NOTE:
The phase angle measurement is not displayed on the LCD.
The phase angle measurement will be printed when the detail print format is selected
and displayed with a PC running the TTRA software application.
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TRI-PHASE OPERATING™ INSTRUCTIONS
5.0 Specifications
TRI-PHASE™ specifications are listed in Table 1.0.
Table 1.0 TRI-PHASE™ Turns-Ratio Meter Specifications
Type Portable, True Three-Phase Transformer Turns-Ratio Meter
Size 17” (43.2cm) L by 21” (53.3cm) W by 9” (22.9cm) H
Weight 35lbs/15.9Kg
Input Voltage 3 A, 100-240Vac 50/60Hz
Turns-ratio
Measuring Ranges
0.8-999: ±0.1%, 1,000-1,599: ±0.2%, 1,600-9,999: ±1% @ 8Vac
10,000-15,000: ±1.5% @ 8Vac
0.8-999: ±0.1%, 1,000-1,599: ±0.2%, 1,600-9,999: ±1% @ 40Vac
10,000-15,000: ±1.5% @ 40Vac
0.8-999: ±0.1%, 1,000-1,599: ±0.2%, 1,600-9,999: ±1% @ 100Vac
10,000-15,000: ±1.5% @ 100Vac
Excitation Voltages Three-phase, 8Vac, 40Vac, 100Vac (Selectable)
Excitation Current 1A @ 8Vac, 0.2A @ 40Vac, 0.1A @ 100Vac
Current Reading
0 to 2,000mA
Range
Current Reading
±0.1mA, ±2% of reading (±1mA)
Accuracy
Phase Angle Reading 0 to 360 degrees
Phase Angle Reading
±0.2 degrees of Reading (±1 Digit)
Accuracy
Winding Polarity Displayed on LCD screen
Display Back-lit LCD screen, 64 x 128 dot graphic display, Viewable in sun light
Computer Interface One RS-232C port and one USB port
FLASH Memory
One USB FLASH memory thumb drive interface port
Thumb Drive
Interface
Memory Storage
Capabilities
Store 112 test records. A test record may contain up to 99 test results.
Store 128 test plans. A test plan may contain up to 33 tests.
LTC Contacts Rating 240Vac, 2A
Temperature
Operating: −10°C to 55°C (15°F to 122°F)
Storage: −30°C to 70° C(−22°F to 158°F)
Warranty One Year on Parts and Labor
NOTE:
All Specifications herein are valid at nominal voltage and ambient temperature of +25º C (+77º F).
Specifications are subject to change without notice.
13
6.0 Supplied Cables
Item Description Qty
TRI-PHASE OPERATING™ INSTRUCTIONS
Table 2.0 Supplied Cable Set
1 H Test-Lead Cable, 15-foot
1
Single-Phase Cables
2 X Test-Lead Cable, 15-foot
1
Single-Phase Cables
3 H Test-Lead Cable, 15-foot
1
Three-Phase Cables
4 X Test-Lead Cable, 15-foot
1
Three-Phase Cables
5 H Extension Cable, 20-foot
1
Three-Phase Cables
6 X Extension Cable, 20-foot
1
Three-Phase Cables
7 LTC Control Cable, 15-foot 1
8 RS-232C Cable 1
9 USB Cable 1
9 Power cord 1
10 Ground Cable 1
NOTE:
A canvas cable-carrying bag is included with the cable set.
14
TRI-PHASE OPERATING™ INSTRUCTIONS
6.1 Cable Marking and Identification
Both the H and X cable test leads are terminated with heavy-duty battery clips. Test cable leads are
identified as follows.
Table 3.0 Cable Markings and Identification
Test Cable Name Transformer Terminals Clip Color Identification
Single Phase H Cables H1 Red H1/1U/A
Single Phase H Cables H2 Red H2/1V/B
Single Phase X Cables X1 Black X1/2U/a
Single Phase X Cables X2 Black X2/2V/b
Three Phase H Cables H0 Red H0/1N/n
Three Phase H Cables H1 Red H1/1U/A
Three Phase H Cables H2 Red H2/1V/B
Three Phase H Cables H3 Red H3/1W/C
Three Phase X Cables X0 Black X0/2N/n
Three Phase X Cables X1 Black X1/2U/a
Three Phase X Cables X2 Black X2/2V/b
Three Phase X Cables X3 Black X3/2W/c
LTC Cable RAISE (two connections) Green RAISE
LTC Cable LOWER (two connections) White LOWER
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TRI-PHASE OPERATING™ INSTRUCTIONS
7.0 TRI-PHASE™ Front Panel Descriptions
7.1 TRI-PHASE™ Operating Controls, Indicators and Connectors
Figure 1.0 Model TRI-PHASE™ Front-Panel Controls, Indicators and Connectors
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TRI-PHASE OPERATING™ INSTRUCTIONS
7.1
TRI-PHASE™ Operating Controls, Indicators and Connectors (continued)
Table 4.0 Model TRI-PHASE™ Front-Panel Controls, Indicators, and Connectors
Fig. 2.0 Index Panel Markings Functional Description
1
2
USB
EMERGENCY
USB interface port to PC
Emergency turn off test voltage switch
TURN OFF
“PUSH”
3
4
H
LTC
H voltage test connector
Load Tap Changer controller connector
CONTROLER
5
6
7
8
X
USB DRIVE
None (wing nut)
120-240Vac, 2 A,
50/ 60Hz
X voltage test connector
USB FLASH memory thumb drive interface port
Ground stud connected to substation ground
Input power connector and fused power switch
with third-wire safety ground
Fuse: 250Vac, 5 A,
Fast Blow
9
10
None (printer)
CHANGE
“PUSH”
TO SELECT
Thermal printer, 4.5-inch wide printout
Control Knob: Turning this Control Knob
scrolls through different menu options (shown
on LCD). Select the displayed menu option by
pushing the knob.
11
12
13
None (keypad)
LTC CONTROL
None (LCD display)
pushbutton operating controls, 16-keys
Load Tap Changer Control push button switches
LCD display 64 by 128 dot graphic, back-
lighted, sunlight readable display
14
TEST IN PROGRESS
This red LED flashes in response to a command
or when a test voltage is applied to the test
transformer. The red LED flashes with a
corresponding beeping sound at a 1 second rate
during test.
15
RS-232C
RS-232C connector for interface to an IBM
compatible computer. A 9-pin, female DB type
connector. Data rate is set to 115,000 baud, 1
start bit, 8 data bits, 2 stop bits, and no parity bit.
Connector pin functions are:
PIN SIGNAL
2 Rx
3 Tx
5 Gnd
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TRI-PHASE OPERATING™ INSTRUCTIONS
8.0 TRI-PHASE™ Printer and Printer Paper
The TRI-PHASE™ built-in thermal printer uses 4.5-inch wide thermal paper for printing test
results. In order to maintain the highest quality printing and to avoid paper jams we recommend
using the paper supplied by our factory. Paper can be ordered from the following sources.
Vanguard Instruments Co, Inc.
1520 S. Hellman Ave.
Ontario, CA 91761
Tel: 909-923-9390
Fax: 909-923-9391
Part Number: TP-4 Paper
OR
BG Instrument Co.
13607 E. Trent Ave.
Spokane, WA 99216
Tel: 888-244-4004
Fax: 509-893-9803
Part Number: TP4 paper
9.0 Memory Storage Capabilities
9.1 Test Record Memory Storage Capabilities
The TRI-PHASE™ is capable of storing up to 112 transformer test records in the on-board FLASH
EEPROM. The TRI-PHASE™ is capable of restoring test records from the on-board FLASH
EEPROM. After a test record is restored it may be viewed on the TRI-PHASE™ LCD screen
and/or transferred to a USB FLASH memory thumb drive, to a PC, or printed using the built-in
thermal printer. Storing more than 112 transformer test records requires a USB FLASH memory
thumb drive. A USB FLASH thumb drive is capable of storing 999 transformer test records.
9.2 Transformer Test Plan Memory Storage Capabilities
Each TRI-PHASE™ is capable of storing up to 128 Transformer Test Plans in the FLASH
EEPROM. Test plans allow the operator to perform a complete transformer test and obtain
PASS/FAIL results.
10.0 Operating Voltages
10.1 Operating Voltages
The TRI-PHASE™ operating voltage is 100-240Vac, 50/60Hz.
The TRI-PHASE™ has built-in ground fault isolation detection and will only operate with
operating voltages that are ground-fault isolated.
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TRI-PHASE OPERATING™ INSTRUCTIONS
11.0 Special Features
11.1 LCD Contrast Control
To darken the LCD display, press and hold the “V Contrast” switch for more than two seconds. To
lighten the LCD display, press and hold the “W Contrast” switch for more than two seconds.
11.2 Test Voltages
The TRI-PHASE™ has three selectable test voltages: 8Vac, 40Vac, and 100Vac. The TRIPHASE™ has two selectable test frequencies, 50 Hz and 60 Hz. Refer to Table
19.0 for test voltage
selection.
11.3 Computer Control And TTRA Software Application
The TRI-PHASE™ may be controlled by an IBM compatible PC via the RS-232 interface port or
USB interface port. Cables for the RS-232C and USB connections are supplied with each TRIPHASE™. The operator connects the appropriate PC interface cable to the TRI-PHASE™. A
Microsoft Windows
™
Based PC TTRA software application is delivered with each TRI-PHASE™.
The TRI-PHASE™ test result data is stored in ASCII format making it possible to export the data
into any database desired. Microsoft Windows XP™, and Microsoft Windows Vista™ support the
TTRA software application. Using this software application, the operator has the ability to:
• Perform transformer test(s) under control of the PC
• Save transformer test results directly to the PC
• Transfer test records stored in the TRI-PHASE™ FLASH EEPROM to the PC
• Transfer transformer test plans generated by the TTRA to the TRI-PHASE™ FLASH
EEPROM memory
• Transfer test records from the TRI-PHASE™ FLASH EEPROM to the thumb drive
• Transfer test plans generated by the TTRA into the thumb drive
11.4 USB FLASH Memory Thumb Drive
The USB FLASH memory thumb drive is capable of storing test records and test plans. This device
will be referred to from now on as the “thumb drive”. Many of the operational menus described in
this manual will contain an extra option to select the thumb drive. When this option is selected, the
submenus will allow for selection of the internal FLASH EEPROM memory or the thumb drive
FLASH memory. Refer to section
25.0 for further details of the menus which have this option.
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TRI-PHASE OPERATING™ INSTRUCTIONS
12.0 Typical Cable Hook Up Configurations
Always ground the TRI-PHASE™ with the provided ground cable contained in the cable set
before connecting H and X cables. Ground the transformer bushings before connecting test leads to
transformer. This procedure prevents inducing any voltages into the TRI-PHASE™. All transformer
buss connections must be removed and transformer isolated before performing testing of
transformer. Typical TRI-PHASE™ cable connections to different transformers are illustrated in
Figure 2.0 to Figure 13.0.
12.1 Typical Cable Connections to a Delta-Wye Transformer
Typical cable connections to a Delta to Wye transformer are shown in
Figure 2.0 and Figure 4.0.
Figure 2.0 Typical H & X Cable Connections to a Delta-Wye Transformer
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TRI-PHASE OPERATING™ INSTRUCTIONS
12.2 Typical Cable Connections to a Delta-Wye Transformer (continued)
X Cable
LTC Control Cable
Gnd Cable
H Cable
Power Cable
Figure 3.0 Typical Front Panel Cable Connectors
H Cable Connections
X Cable Connections
Figure 4.0 Typical H & X Cable Connections to Delta-Wye Transformer
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TRI-PHASE OPERATING™ INSTRUCTIONS
12.3 Single Phase Transformer Typical Connections
Figure 5.0 Single Phase Transformer Typical Connections
Figure 6.0 Single Phase Auto Transformer Typical Connections
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TRI-PHASE OPERATING™ INSTRUCTIONS
12.4 Voltage Regulator Typical Connections
Figure 7.0 Type A Voltage Regulator Typical Connections
Figure 8.0 Type B Voltage Regulator Typical Connections
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TRI-PHASE OPERATING™ INSTRUCTIONS
12.5 Donut Type (un-mounted) Current Transformer (CT) Typical Connections
Figure 9.0 Donut Type (un-mounted) Current Transformer (CT)
Typical Connections
NOTE:
H and X test leads are reversed for the CT ratio test shown above.
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12.6 Multi-tap CT Typical Connections
TRI-PHASE OPERATING™ INSTRUCTIONS
Figure 10.0 Multi-tap CT Typical Connections
12.7 Bushing-Mount-CT on A Typical Single Phase Transformer Connections
Figure 11.0 Bushing-Mount-CT on A Typical Single Phase Transformer Connections
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TRI-PHASE OPERATING™ INSTRUCTIONS
12.8 Bushing Mount CT’s on Typical Delta Transformer Connections
NOTE:
Install jumper on the unused winding
Figure 12.0 Bushing Mount CT’s on Typical Delta Transformer Connections
NOTE:
The CT turns-ratio is obtained by performing a YNd test.
Install jumpers on transformer secondary windings
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.
TRI-PHASE OPERATING™ INSTRUCTIONS
12.9 Bushing Mount CT’s on Typical Wye Transformer Connection
Figure 13.0 Bushing Mount CT’s on Typical Wye Transformer Connection
NOTE:
The CT turns-ratio is obtained by performing an YNyn test.
Install jumpers on transformer primary windings.
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TRI-PHASE OPERATING™ INSTRUCTIONS
13.0 Single-Phase Transformer Test Procedure
Table 7.0 shows the procedure to test a single-phase transformer (2,400 V/240 V). Detailed
descriptions of each menu are provided in the following sub-sections. Refer to Figure 1.0 for
location of controls. The precondition for the following test procedure is that no previous singlephase transformer test has been performed (i.e., no stored test results in non-volatile memory), and
there were no previous test records restored to non-volatile memory.
NOTE:
Pressing the “STOP” button aborts all tests and/or submenus
and returns the LCD screen display to the “Main Menu”.
Table 5.0 Single-Phase Transformer Test Procedure
STEP DESCRIPTION DISPLAY ACTION
1 Select “Run Test” from the
“Main Menu”
2 Select “Single Phase” from
“Transformer Configuration
Menu”
3 “Transformer Name Plate
Voltage Status Display”
Select “YES”
4 “Name Plate Voltage Status
Display”
Enter H line voltage from
transformer nameplate
5 “Name Plate Voltage Status
Display”
Confirm H voltage
6 “Name Plate Voltage Status
Display”
Enter X line voltage from
transformer nameplate
7 “Name Plate Voltage Status
Display”
Confirm X voltage
1.RUN TEST
2.SETUP
3.TEST PLAN
4.DIAGNOSTIC
TIME: 20:15:00
DATE: 07/16/08
XFMR CONFIG:
1.SINGLE PHASE
2.Dy
3.Yd
4.Dd
5.Yy
6.Next Page
XFMR NAME PLATE VLTG
1.YES
2.NO
NAME PLATE VOLTAGE:
H : X
0 :
NAME PLATE VOLTAGE:
H : X
2,400 :
NAME PLATE VOLTAGE:
H : X
2,400: 0
NAME PLATE VOLTAGE:
H : X
2,400 : 240
Press key number 1
or push down Control
Knob
Press key number 1
or push down Control
Knob
Press key number 1
or push down Control
Knob
Use keys 0-9 for data
entry of transformer
name plate voltage
Press “ENTER”
or push down Control
Knob
(2400 was keyed for
this test)
Use key numbers 0-9
for data entry
Press “ENTER”
or push down Control
Knob
(240 was keyed for
this test)
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TRI-PHASE OPERATING™ INSTRUCTIONS
13.0 Single-Phase Transformer Test Procedure (continued)
Table 5.0 Single-Phase Transformer Test Procedure (continued)
STEP DESCRIPTION DISPLAY ACTION
8 “Start/Stop Test Status Display”
9 “Test in Progress” status display
10 “Test Results Status Display”
Observe ratio, excitation current,
and percentage error on LCD
display
11 “Test Results Status Display”
Go to next LCD display
12 Select “YES” from the “Print
Test Results Menu” to print test
result on built-in
printer
13 Select “Column” from the “Print
Format Menu”
14 Select “YES” from the “Keep
This Reading Menu” to store
current test reading (i.e., test
results) in non-volatile memory
NOTE:
Refer to note at end of table
“START” TO TEST
OR
“STOP” TO ABORT
TEST IN PROGRESS
PLEASE WAIT…
RATIO mA %DIFF
+10.005 1.9 0.05
RATIO mA %DIFF
+10.005 1.9 0.05
PRINT TEST RESULTS?
1.YES
2.NO
PRINT FORMAT
1.COLUMN
2.DETAILED
KEEP THIS READING?
1.YES
2.NO
Press START key
None
None
Press any key or push
down Control Knob
Press key number 1
or push down Control
Knob
Press key number 1 or
push down Control
Knob for a column
report.
Press key number 1 or
push down Control
Knob to store reading
15 “Test Saved Status Display”
Current test reading is saved
16 Select “NO” from the “Run
Another Test Menu”
17 Selecting “YES” from the “Save
This Record Menu”
Store test results in FLASH
EEPROM
TEST SAVED
RUN ANOTHER TEST?
1.YES
2.NO
3. REPEAT PREV. TEST
SAVE THIS RECORD?
1.YES
2.NO
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Press any key or push
down Control Knob
Press key number 2
Selection of 2 may be
made by turning the
Control Knob. Push
down Control Knob
after 2 is selected
Press key number 1
or push down Control
Knob
TRI-PHASE OPERATING™ INSTRUCTIONS
13.0 Single-Phase Transformer Test Procedure (continued)
Table 5.0 Single-Phase Transformer Test Procedure (continued)
STEP DESCRIPTION DISPLAY ACTION
18 “Record Saved” confirmation
status display
Test results saved in FLASH
EEPROM as a test record
NOTE:
The next sequential record
number (#) is automatically
generated and displayed
19 Return to “Main Menu”
RECORD NUMBER #
HAS BEEN SAVED
1.RUN TEST
2.SETUP
3.TEST PLAN
4.DIAGNOSTIC
TIME: 20:15:00
DATE: 07/16/08
Press any Key or push
down Control Knob
None
NOTE:
The precondition for the above test procedure was that no previous single-phase transformer test
record was residing in temporary memory. Once a single phase test record has been saved to
FLASH EEPROM, or a single phase test record restored from FLASH EEPROM and another single
phase transformer test is performed, selecting “YES” in response to “Keep This Reading” at step
17 results by displaying the following menu.
PREVIOUS DATA IN BUF.
1.APPEND PREV. DATA
2.CLEAR PREV. DATA
Selecting menu option 1 (“Append Prev. Data”) will result in appending the current test results to
all of the previous test results from the test record stored in temporary memory, assigning this new
record to the next test record number in sequence. Selecting menu option 2, “Clear Prev. Data” will
result in clearing the temporary memory of all previous test results from the test record except the
current test results and assigning this test result to the next sequential test record number. The
temporary memory will be lost when the TRI-PHASE™ is powered-off, but the test records remain
in the TRI-PHASE™ FLASH EEPROM non-volatile internal memory.
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