Raytech TR-Mark III 250V User manual

INSTRUCTION MANUAL
ENGLISH
TR-MARK III 250V
Turns Ratio Meter 3 Phase
RAYTECH AG, Oberebenestrasse 11, CH-5 20 Bremgarten, Switzerland

Contents
1 Safety Precautions.............................................................................................................................. 4
2 Unpacking...........................................................................................................................................
3 Introduction......................................................................................................................................... 7
3.1 History............................................................................................................................................................ 7
3.2 General.......................................................................................................................................................... 7
3.3 Advantages & Features..................................................................................................................................8
3.4 System Details............................................................................................................................................... 9
3.4.1 System Check:....................................................................................................................................... 9
3.4.2 Transformer Turns Ratio Testing:..........................................................................................................9
3.4.3 Transformer Turns Ratio Meter uses:..................................................................................................10
3.4.4 Limitations of Turns Ratio Testing:.......................................................................................................11
4 Quick Start Guide............................................................................................................................. 12
4.1 Instrument operation....................................................................................................................................12
4.2 Connection to Test Object............................................................................................................................13
4.2.1 Hooking up a transformer.....................................................................................................................13
4.2.2 Comparison of International Standards................................................................................................14
5 Operation Elements Field Case........................................................................................................ 15
5.1 Front Panel Overview...................................................................................................................................15
5.2 Control Elements and Plugs.........................................................................................................................15
5.2.1 Fuse, Mains Input and Mains Switch...................................................................................................15
5.2.2 Ground Terminal..................................................................................................................................15
5.2.3 Emergency Stop...................................................................................................................................1
5.2.4 High Voltage Side Connector...............................................................................................................1
5.2.5 Low Voltage Side Connector................................................................................................................1
5.2. 3 Phase Extension (T-REX).................................................................................................................1
5.2.7 External................................................................................................................................................ 1
5.2.8 Interface...............................................................................................................................................1
5.2.9 Safety Indicator....................................................................................................................................1
5.2.10 Display and Touch Panel...................................................................................................................1
5.2.11 Thermal Printer.................................................................................................................................. 1
Operation Elements Rack.................................................................................................................17
.1 Rack: Front Panel Overview........................................................................................................................ 17
.2 Rack: Rear Panel Overview.........................................................................................................................17
7 Transformer, Measurement and Data Structure...............................................................................18
7.1 Introduction.................................................................................................................................................. 18
7.2 How it works.................................................................................................................................................18
8 Operating Menu................................................................................................................................ 20
8.1 Main Screen................................................................................................................................................. 21
8.1.1 Operating on a simple screen, no Transformer Data entered..............................................................21
8.1.2 Further Options of Main screen............................................................................................................23
8.1.2.1 Change Test Voltage.....................................................................................................................23
8.1.2.2 Continuous Measurement and Stop Measurement.......................................................................23
8.1.2.3 Print and Save, Turns Ratio or Voltage Ratio................................................................................24
8.1.3 Operating on an advanced Screen, Transformer Data entered...........................................................25
8.1.3.1 Pass, Fail and Transformer Name.................................................................................................25
8.1.3.2 Turn Ratio and Voltage Ratio........................................................................................................2
8.1.4 Taps..................................................................................................................................................... 27
8.1.5 More Taps............................................................................................................................................ 29
8.1. Tertiary Winding System......................................................................................................................30
8.2 New.............................................................................................................................................................. 32
8.2.1 New Transformer................................................................................................................................. 33
8.2.1.1 Simple Transformer, no taps.........................................................................................................33
8.2.1.2 Taps...............................................................................................................................................34
8.2.1.3 Tertiary Winding System................................................................................................................35
8.2.2 Load from Archive................................................................................................................................ 3
8.2.3 Copy Actual Transformer.....................................................................................................................37
8.2.4 New Measurement...............................................................................................................................38
8.2.5 Working with Templates....................................................................................................................... 38
8.3 Info............................................................................................................................................................... 39
8.3.1 Enter Tap Changer Data by Wizard.....................................................................................................41
8.3.2 Enter Tap Changer Data manually.......................................................................................................41
8.4 Archive......................................................................................................................................................... 42
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8.5 Setup............................................................................................................................................................ 43
8.5.1 General................................................................................................................................................ 44
8.5.1.1 License.......................................................................................................................................... 44
8.5.1.2 About............................................................................................................................................. 44
8.5.1.3 Clock..............................................................................................................................................44
8.5.1.4 Cursor............................................................................................................................................ 44
8.5.1.5 Update...........................................................................................................................................44
8.5.1. Language....................................................................................................................................... 44
8.5.1.7 Service...........................................................................................................................................44
8.5.2 Operators.............................................................................................................................................45
8.5.3 Standards.............................................................................................................................................45
8.5.4 Printer................................................................................................................................................... 45
8.5.5 Color..................................................................................................................................................... 45
9 Technical Specification.....................................................................................................................4
10 Interfaces........................................................................................................................................ 49
10.1 Hardware.................................................................................................................................................... 49
10.2 T-Base (Software)...................................................................................................................................... 50
10.3 TR-MARK III USB Device Interface........................................................................................................... 51
10.3.1 Hardware Protocol............................................................................................................................. 51
10.3.2 Raytech Native USB Driver................................................................................................................ 51
10.3.3 Software Protocol............................................................................................................................... 52
10.3.3.1 When using Raytech Toolbox......................................................................................................52
10.3.3.2 When using SDK (Software Development Kit)............................................................................52
10.4 TR-MARK III Serial Communication Interface...........................................................................................53
10.4.1 Hardware Protocol............................................................................................................................. 53
10.4.2 Software Protocol............................................................................................................................... 53
10.4.2.1 Switch to Remote.........................................................................................................................53
10.4.2.2 Switch to Local.............................................................................................................................53
10.4.2.3 Syntax of Commands..................................................................................................................54
10.5 TR-MARK III Remote Commands..............................................................................................................54
A. Application Notes............................................................................................................................ 57
A.A Real Three Phase Voltage Option T-Rex....................................................................................................57
A.B Current Transformer Testing....................................................................................................................... 58
A.B.A Introduction.........................................................................................................................................58
A.B.B Usual Measurement............................................................................................................................58
A.B.C Low Impedance.................................................................................................................................. 59
A.B.D Info...................................................................................................................................................... 59
A.B.E CTs with Taps (Tapped Secondary)...................................................................................................59
B. Test Reports.................................................................................................................................... 0
B.A Internal Printer............................................................................................................................................. 0
B.B External Printer............................................................................................................................................ 1
C. Extended Safety Interlock Option (70049-A)................................................................................... 2
C.A A Look under the Hood............................................................................................................................... 3
C.B Dummy Plug – Use without external Interlock............................................................................................ 3
D. Firmware Update............................................................................................................................. 4
E. Error Messages............................................................................................................................... 5
F. Warranty Conditions........................................................................................................................
G. Trouble Shooting............................................................................................................................. 7
H. Contacts.......................................................................................................................................... 8
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1 Safety P ecautions
The following safety precautions must be observed during all phases of operation, service
and repair of this instrument. By purchasing this equipment the purchaser assumes all
liability for the operation and use of this equipment. The intended use of the instrument, its
design and manufacture, is to be conducted within the precautions or other specific warnings
located within this manual. Failure to comply with these precautions and other specific
warnings violates safety standards of design, manufacture, and intended use. Raytech
GmbH assumes no liability for the operation and use of this equipment.
SAFE OPERATION:
Only qualified knowledgeable persons should be permitted or attempt to operate this test
equipment. All test personnel should fully familiarize themselves with the correct application
and operation of this and all test equipment prior to operation. Persons directly and indirectly
engaged in the operation of this test equipment should keep clear of all high voltage
apparatus while conducting tests and measurements.
BEFORE APPLYING POWER:
Do not vary the input power source voltage level (IE...Connected to a variable AC power
source).
The TR-MARK III auto-senses the input power from the mains plus 110 or 240 VAC 50/ 0Hz.
Varying the input voltage will cause the test voltage to vary and result in a higher or lower
test voltage than indicated. Heavy changes may even damage the device.
GROUND THE INSTRUMENT:
To minimize shock hazard, the instruments Ground Terminal must be connected to a
properly grounded receptacle. In many cases, the quality of the safety ground provided by
the power cord does not fulfill safety needs. Also the power cord supplied with the equipment
must be connected an electrical receptacle with an electrical ground (safety earth ground).
Non grounded instruments are dangerous and may cause instrument damage.
KEEP AWAY FROM LIVE CIRCUITS:
Operating personnel must not remove instrument covers. Component replacement and
internal adjustments must be made by qualified service personnel. Do not replace
components with power cable connected. To avoid injuries, always disconnect power,
discharge circuits, and remove external voltage sources before touching components.
WARNING!
Never connect TR-MARK III to a transformer, which is energized or
connected to power lines.
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DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE:
Do not operate the instrument in the presence of flammable gases or fumes.
DO NOT SUBSTITUTE PARTS OR MODIFY INSTRUMENT:
Because of the danger of introducing additional hazards, do not install substitute parts or
perform any unauthorized modification to the instrument. Return the instrument to a Raytech
service department for service to ensure proper operation and that safety features are
maintained.
Instruments, which appear damaged or defective, should be made inoperative and secured
against unintended operation until they can be repaired by qualified service personnel.
DO NOT TOUCH TEST LEADS WHILE TEST VOLTAGE IS ON
Your TR-MARK III is equipped with 100V and 250V test voltage. These voltages can be
dangerous to humans, animals and equipment.
WARNING!
Never touch test Leads of TR-MARK III while test voltage is on
Check safety indicator on front panel.
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2 Unpacking
A complete shipment consists of the following items:
Instrument Cable bag H and X lead cable
2 Extension cables Power cord (depending USB memory stick
on country of distribution)
Accessories: Instruction:
2 paper rolls This manual
and 2 fuses
If any of the above items are missing or damaged contact your local representative or
Raytech GmbH immediately.
NOTE
The TR-MARK III field case is a waterproof design. When the case is
unlocked, a small hole automatically opens, to compensate
atmospheric pressure changes.
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3 Int oduction
3.1 Histo y
Raytech first developed the Transformer Turns Ratio Spy (TR-Spy) for high degree of
accuracy for the research and development of transformers. This technology was then
packaged into a portable test system for use by transformer manufacturers, rebuild shops,
and electrical maintenance crews. This first system had become the most widely respected
precision instrument for the ease of use, design, and operation. It was developed with the
assistance of transformer manufacturer’s and utility test crews.
The TR-Spy MARK II took this initial development and added many new features to the
system including a large memory base, external control for tap changer testing, and
automatic voltage level detection test. The TR-Spy MARK II was a completely new approach
in technology and has become the standard for ratio testing.
Now the TR-MARK III offers new features and increased accuracy to make it a perfect
system. A color LCD with back lighting and touch screen increases handling and user
comfort. Two USB interfaces make it easy to store measurements on external storage
devices and transfer easily to a personal computer. Test Reports; just print them on the
internal printer or from your computer.
3.2 Gene al
Ease of use: This system is designed to be easily used and understood. Once the buttons
and few menus are learned the system is very simple to understand and operate.
This intelligent system analyzes the configuration of a transformer and performs all required
measurements automatically for Voltage Ratio, Turns Ratio, Current, and Phase
Displacement. The system can operate a full 3 phase testing sequence with a single push
button operation. Connect the leads, Select the transformer configuration then press GO to
test.
Imp essive Accu acy: The TR-MARK III is a high precision, fully automatic, microprocessor
based, Single and Three Phase Transformer Turns Ratio Test system. This system is
designed for highly accurate readings on-site with laboratory precision. It is the most
accurate system available.
Unique Measu ing Technique: This newly designed technique of measurement
incorporates a high precision dual-vector voltage meter for ratio readings and a rectification
resolution circuit for phase displacement (vector group). The phase displacement (vector
group) can be automatically detected and displayed without operator intervention.
Ope ation: The TR-MARK III first applies a small voltage on the HIGH winding side of the
transformer and measures back through the LOW side of the transformer. Analysis is made
and the system determines whether a test can be conducted. Then the system applies the
test voltage on the HIGH winding side of the transformer and measures the voltage back
through the LOW side of the transformer. This technique has been determined to be the
safest possible method of ratio testing. The results are reported on the easy to read touch
screen display.
Compact Design: The TR-MARK III is a lightweight system designed with its own rugged
waterproof field case.
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Simple Maintenance: There is no maintenance required. There is no calibration procedure
(no potentiometers to turn). This is due to the utilization of high precision components in the
design.
Advanced P otection: Upon powering on the system initializes itself with a self-calibrating,
circuit checking sequence. If any problems are detected during this initialization period, or
during operation, the operator is immediately notified. The system constantly monitors the
condition of the transformer under test. The TR-MARK III can even recognize shorted leads
and will terminate the test without any damage to the test equipment. This works especially
well when test leads accidentally fall free from the transformer while under full voltage
measurement. Accidental interchanging of the test leads on the High and Low voltage side
are also detected and the measurement is safely halted
3.3 Advantages & Featu es
Color LCD with backlighting and touch screen
Automatic measurements of Voltage, Turns Ratio, Current, and Phase displacement
Easy one time hook up to the transformer
Automatic test voltage range
Displays deviation from a nominal ratio
Graphical tap changer display
Tap changer interface (In- and Output)
Load on test object <0.05 VA
Measures Power transformers, PT’s and CT’s
Displays % error vs. name plate value
Automatic phase vector detection
Enhanced heavy-duty protection circuitry
Extremely rugged (can withstand a drop test of 1 meter)
Data exchange via USB-Key
Internal Printer
2 Years standard warranty
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3.4 System Details
3.4.1 System Check:
The instrument is Line operated. It is designed to be used with voltage power sources (mains
power) 110/240 VAC 50/ 0Hz. The system performs a self-check each time that it is
powered on. The User should always visually inspect all connectors, cables and devices to
be measured to avoid any safety issues.
3.4.2 T ansfo me Tu ns Ratio Testing:
A Transformer Turns Ratio Meter does exactly as its name implies; it is used primarily for
checking the ratio of Turns of wires of the primary side and the secondary side of a
transformer. The Turns Ratio test set does not tell exactly how many turns of wire are in the
primary and secondary coils. But rather, it measures and displays the Ratio of (or
comparison of) the number turns in the primary coil to the number of turns in the secondary
coil.
This is an extremely useful device to check for shorted turns and incorrect settings of tap
changers. The TR-MARK III has an additional feature of allowing the operator to measure the
actual phase angle and vector relationship of the windings.
It is important to understand that the Nameplate Ratio on most transformers is the Voltage
ratio (Voltage in: Voltage out) and this Ratio is determined, basically, by the number of turns
of wire on the Primary (High side), the number of turns of wire on the Secondary (Low Side).
On a single phase Transformer the Turns Ratio is the same as the Voltage Ratio.
A Single Phase transformer:
For example: The High Side Winding may contain 940 Turns: Low Side Winding 440 Turns.
Therefore:
With three (3) Phase Transformers of different configurations, Turns Ratio and Voltage Ratio
can be, and usually are different.
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NOTE
The TR-MARK III makes all the calculations and interconnections
required, when the correct configurations of single (1) phase and three
(3) phase transformers are selected. In most cases, no other external
connections, other than the test leads provided, are required.
But please check chapter ‘ ’ for safety grounding.
Hooking up to a transformer:
The TR-MARK III protects against a wrong hook-up to a transformer or
testing a severely defective transformer. Every effort has been made to
alert the operator when something is wrong.
Negative (reverse polarity) hook up is also automatically detected.
3.4.3 T ansfo me Tu ns Ratio Mete uses:
A Transformer Turns Ratio Meter is very useful as a tool for investigating problems
associated with the core, the windings, and the tap changer of transformers and should be
used for:
1. Identify shorted turns and finding turn errors
2. Defective and incorrect tap settings
3. Finding mislabeled terminals and mislabeled nameplates
Turns Ratio testing is a required test during the manufacture of transformers. It is too a part
of a good routine preventative maintenance program as well as for Acceptance testing.
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