Raytech GmbH, Oberebenestrasse 11, CH 5620 Bremgarten, Switzerland
INSTRUCTION MANUAL
ENGLISH
Contents
1 Safety Precautions.......................................................................................................................6
2 Unpacking.................................................................................................................................... 8
2.1 WR100............................................................................................................................... 8
2.2 WR50................................................................................................................................. 9
2.3 WR14............................................................................................................................... 10
3 Introduction................................................................................................................................. 12
3.1 General............................................................................................................................. 12
3.2 Advantages & Features....................................................................................................13
3.3 System Details.................................................................................................................. 14
4 Quick Start Guide.......................................................................................................................16
4.1 Instrument Operation – Profiles deactivated.....................................................................16
4.2 Instrument Operation – Use Profiles................................................................................. 17
4.3 Selection the proper current range...................................................................................19
4.4 Connection to Test Object.................................................................................................19
4.4.1 Single Phase Transformer, Vector Group 0.............................................................20
4.4.2 Three Phase Transformer, Δ - Δ Vector Group 0....................................................21
4.4.3 Three Phase Transformer Δ - Y............................................................................... 22
4.4.4 Three Phase Transformer Δ - Y............................................................................... 23
5 Operation Elements.................................................................................................................... 24
5.1 WR100............................................................................................................................. 24
5.1.1 Front Panel WR100R.............................................................................................. 24
5.1.2 Rear Panel WR100R.............................................................................................. 26
5.1.2.1 Mains Connections....................................................................................... 28
5.1.3 Mains Connection Example for WR100R................................................................29
5.2 WR50R............................................................................................................................. 30
5.2.1 Front Panel WR50R................................................................................................ 30
5.2.2 Rear Panel WR50R................................................................................................ 32
5.3 WR14R............................................................................................................................. 34
5.3.1 Front Panel WR14R................................................................................................ 34
5.3.2 Rear Panel WR14R................................................................................................ 36
6 Operating Menu.......................................................................................................................... 38
6.1 Menu Structure without using Profiles..............................................................................40
6.2 Menu Structure Use Profiles............................................................................................. 41
6.2.1 Introduction to Transformer Profiles and Data Structure.........................................42
6.3 Main Menu........................................................................................................................ 44
6.3.1 Main Menu Screen.................................................................................................. 44
6.3.2 Start........................................................................................................................ 46
6.3.3 Store....................................................................................................................... 46
6.3.4 Stop........................................................................................................................ 46
6.3.5 Demag.................................................................................................................... 47
6.3.6 Setup...................................................................................................................... 48
6.3.7 General................................................................................................................... 49
6.3.7.1 Mouse Cursor............................................................................................... 49
6.3.7.2 Use Profiles.................................................................................................. 49
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 2 of 139
6.3.7.3 Color............................................................................................................. 50
6.3.7.4 Length Correction......................................................................................... 51
6.3.7.5 License......................................................................................................... 52
6.3.7.6 Firmware update........................................................................................... 53
6.3.7.7 Language...................................................................................................... 53
6.3.7.8 Clock Settings............................................................................................... 54
6.3.7.9 About.............................................................................................................55
6.3.7.10 USB Printer................................................................................................. 55
6.3.7.11 Service Mode.............................................................................................. 56
6.3.8 Config..................................................................................................................... 57
6.3.8.1 With Profiles deactivated...............................................................................57
6.3.8.2 Using Profiles................................................................................................58
6.3.9 Mode....................................................................................................................... 60
6.3.9.1 Single............................................................................................................ 60
6.3.9.2 Continuous....................................................................................................60
6.3.9.3 Interval.......................................................................................................... 61
6.3.10 Range................................................................................................................... 63
6.3.11 Temperature Correction......................................................................................... 64
6.3.12 Results.................................................................................................................. 67
6.3.12.1 Details......................................................................................................... 68
6.3.12.2 Diagram...................................................................................................... 69
6.3.12.3 Print / Export............................................................................................... 70
6.3.12.4 Esc.............................................................................................................. 70
6.3.13 Profile................................................................................................................... 71
6.3.13.1 Create a new Profile................................................................................... 72
6.3.13.2 Load Transformer Profile from Archive........................................................75
6.3.13.3 Working with Templates..............................................................................76
6.3.13.4 Diagram...................................................................................................... 78
7 Options....................................................................................................................................... 79
7.1 Temperature Measurement............................................................................................... 79
7.2 Heat Run Test Software.................................................................................................... 80
7.2.1 Introduction............................................................................................................. 80
7.2.2 Measurement with interval mode for HRT...............................................................81
7.2.3 Analysing the HRT Results..................................................................................... 83
7.2.3.1 Save the HRT approximation........................................................................86
7.2.3.2 Showing the graph in °C...............................................................................87
7.3 Battery Option WR14R.....................................................................................................89
7.4 Cable extension WR100...................................................................................................91
7.4.1 WRO112................................................................................................................. 91
7.4.2 WRO113................................................................................................................. 92
7.5 Cable extension WR50.....................................................................................................93
7.5.1 WRO102................................................................................................................. 93
7.5.2 WRO103................................................................................................................. 94
7.5.3 WRO402................................................................................................................. 95
8 Technical Specifications.............................................................................................................96
8.1 WR100............................................................................................................................. 96
8.2 WR50............................................................................................................................... 98
8.3 WR14............................................................................................................................. 100
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Type WR100 / WR50 / WR14 Page 3 of 139
9 Interfaces.................................................................................................................................. 102
9.1 Hardware........................................................................................................................ 102
9.1.1 RS 323.................................................................................................................. 102
9.1.2 USB...................................................................................................................... 103
9.1.3 Extern................................................................................................................... 104
9.1.3.1 Standard type..............................................................................................104
9.1.3.2 Example for connecting an external warning device...................................105
9.1.3.3 Extended Safety Circuit type.......................................................................105
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 4 of 139
Appendix
A Raytech T-Base Pro.................................................................................................................. 109
A.1 Description......................................................................................................................109
A.2 Application Example........................................................................................................ 110
A.3 Concept of T-Base Pro.................................................................................................... 112
A.4 Components of T-Base Pro............................................................................................. 112
A.4.1 T-Base Pro – totally free........................................................................................112
A.4.2 Create your Add-On with T-Base SDK...................................................................112
A.4.3 T-Base Pro Remote Option for Raytech Devices...................................................113
A.4.4 Proprietary Add-On - Sequence............................................................................113
A.4.5 Proprietary Add-On - Remote I/O to external Software.........................................114
A.5 Graphical User Interface.................................................................................................. 115
A.6 USB Driver for T-Base Pro...............................................................................................116
B Software Development Kit (SDK).............................................................................................. 117
C Service Mode............................................................................................................................ 118
C.1 Calibrate Touchscreen.....................................................................................................118
C.2 Show Ground Warning.................................................................................................... 119
C.3 CSV Separator................................................................................................................ 120
C.4 Raytech USB Driver for T-Base.......................................................................................121
C.4.1 Active Sync for Toolbox.........................................................................................121
D Command Syntax..................................................................................................................... 122
D.1 Serial Interface................................................................................................................ 122
D.2 USB Interface.................................................................................................................. 123
E USB Printer Info........................................................................................................................124
F Measuring high- and low-voltage-side in series.........................................................................125
G Measuring with 2 WR-Meters at the same time........................................................................128
H Demagnetizing..........................................................................................................................130
I Multiplexer.................................................................................................................................. 132
J Warranty Conditions..................................................................................................................133
K Error Messages......................................................................................................................... 135
L Trouble Shooting.......................................................................................................................137
M Contacts................................................................................................................................... 139
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 5 of 139
1 Safety Precautions
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 Switzerland 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.
WARNING!
Never connect the instrument to an energized transformer!
GROUND THE INSTRUMENT
The power cord supplied with the equipment must be connected an electrical receptacle with an
electrically grounded terminal (Earthed Ground). To minimize shock hazard, the Ground Terminal
on the instrument must be properly connected to an Earth grounded point. In many cases, the
quality of the safety ground terminal provided by the power cord does not fulfil the safety
requirements.
Non grounded instruments are dangerous and may cause Personnel and instrument damage.
BEFORE APPLYING POWER
Read this manual carefully before operating the system. The instruments are line operated1. They
operate from a wide range power input from 90 to 264Vac and 47…63Hz with automatic ranging.
1 The WR14 is battery operated and the WR14-R has a battery operation option. Both systems have safety ground lugs.
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 6 of 139
KEEP AWAY FROM LIVE CIRCUITS
Operating personnel must not remove instrument covers. Component replacement and internal
repairs must be made by qualified service personnel. Do not replace components or service this
instrument with the power cable connected. To avoid injuries, always discharge circuits, disconnect
power and remove external voltage sources before touching components.
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.
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 7 of 139
2 Unpacking
2.1 WR100
The instrument consists of the following items:
The Instrument Hardwired power cable Set of Accessories
(Rack handles, Fuses)
Current cables Jumper cables
(2 cables with WR100-13R)
Cable bag
Potential cables: Channel 1 Potential cables: Channel 2 Potential cables: Channel 3
(with WR100-13R)
USB Memory Stick Instruction Manual
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 8 of 139
2.2 WR50
The instrument consists of the follwoing items:
The Instrument Power cord (depending
on county of distribution)
Set of Accessories
(Rack handles, Fuses)
Current cables Jumper cables
(2 cables with WR50-13R)
Cable bag
Potential cables: Channel 1 Potential cables: Channel 2 Potential cables: Channel 3
(with WR50-13R)
USB Memory Stick Instruction Manual
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 9 of 139
2.3 WR14
The instrument consists of the follwoing items:
The Instrument Power cord (depending
on county of distribution)
Set of Accessories
(Rack handles, Fuses)
Current cables Jumper cables
(2 cables with WR50-13R)
Cable bag
Potential cables: Channel 1 Potential cables: Channel 2 USB Memory Stick
Instruction Manual
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 10 of 139
If any of the above items are misssing or damaged, contact your local representative or Raytech
Switzerland immediately.
Optional test leads may be ordered (other than shown).
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 11 of 139
3 Introduction
3.1 General
Raytech Digital Winding Resistance meters are the enhanced version winding resistance system
with a most advanced demagnetizing circuit. They are designed for high degree of accuracy for the
measurement of very low resistance of inductive loads.
Ease of use: This intelligent system has an easy to use operation screen, which allows quick
selection of the current level to be measured. This system incorporates a touchscreen which allows
the user easy access to change or activate a feature.
Impressive Accuracy: The WR series of instruments have high precision, fully automatic, multimicroprocessor based architecture. These systems are designed for highly accurate readings onsite with laboratory precision.
Unique Measuring Technique: This newly designed technique of measurement incorporates a
high precision measurement circuit, a unique power source and the fastest discharge unit on
market. Extensive filtering and high precision standards are used within the test system. The
WR100 is capable of precision measurements up to 100A (WR50: 50A, WR14: 15A).
Operation: The WR series of instruments apply a present current level, selected by the user, from
0.025A to 100A. The 50V2 power source quickly charges the load and the results of the test are
displayed within a few seconds automatically. The results are reported on the easy-to-read color
LCD display and can be stored or printed.
Compact Design: The WR series of instruments are designed for 19” rack-mount installation. The
WR50 and the WR14 series of instrument are although available in their own rugged waterproof
field cases.
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 Protection: 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 when
turned on. The WR series have extensive protection built in to the circuitry. This is one of the many
reasons we can extend our warranty to 2 years.
2 WR14: 30V
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 12 of 139
3.2 Advantages & Features
• Highest Accuracy and Precision of any high current test system.
• Automatic measurements of Low Resistance from 0.00µΩ ...100kΩ.
• Demagnetizing Circuit (Advanced design)
• Microprocessor based system with internal storage for over 10000 test results.
• Data exchange via USB-Key
• Storage and Printing of test results while the test system is measuring.
• Complete automatic calibration system and system diagnostics.
• Standard USB 1.1 & RS232 (serial) Interface.
• Pure filtered DC Power source for the highest accuracy readings.
• Automatic, high efficiency cooling system to dissipate internal temperatures.
• Automatic shut off for over-temperature condition
• Color LCD with backlighting and touch screen
• Panel mounted Emergency Stop Switch
• Fastest discharge time in the market
• 2 Year standard warranty
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Type WR100 / WR50 / WR14 Page 13 of 139
3.3 System Details
System Check:
The instruments are line operated3. The systems are designed to be used with AC Voltage power
sources between 90 to 264VAC 47…63Hz. You will find a description and additional information in
chapter 5.1.2.1 for the WR100. The systems perform a self-check each time that they are powered
on. The User should always visually inspect all connectors, cables and devices to be measured to
avoid any safety issues.
Limitations of Winding Resistance Testing:
In general, there are no limitations on testing low or high inductive windings of transformers.
The test systems are specially designed to test all transformer windings.
Discharging the Transformer windings:
The WR systems are specialized systems designed to measure Transformer windings. These
systems are equipped with heavy-duty discharge circuits that are very unique in design.
The internal discharge circuit dissipates the stored energy in the transformer windings with a
“Constant Power Discharge Circuit” that is unique to all transformer winding test systems.
That is the reason why Raytech systems can discharge transformers more than 10 times faster
than any other system on the market.
If a cable happens to fall off during test, the system will STILL discharge the test object safely with
the automatic Constant Power Discharge Circuit.
The Potential Test Leads are part of the safety circuit and have the ability to discharge a
transformer should one of the current leads become detached.
WARNING!
Do not use a smaller gauge potential cables (Channel 1, 2, or 3) then the
original Raytech cables supplied!
3 The WR14-R has a battery operated option in addition to mains power
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 14 of 139
Low Resistance Testing:
The WR series of test instruments utilize a 4 wire measuring technique for each Channel. The
points where the potential leads are connected determine the resistance reading.
The test set employs a very simple principle of Ohm’s law:
R=
U
I
R = Resistance
U = Voltage
I = Current
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 15 of 139
4 Quick Start Guide
4.1 Instrument Operation – Profiles deactivated
4
For examples of Transformer connections see chapter 4.4 "Connection to Test Object" on page 19.
1. Power on the instrument 2. Select the Test Current:
press Range or Setup / Range
3. Press start button 4. Get the results
5. Press stop button
WARNING!
Wait until the green light shows
"Safe" before disconnecting the
cables!
4 The checkbox "Use Profiles" is not selected in the Setup under General
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 16 of 139
4.2 Instrument Operation – Use Profiles
For examples of Transformer connections see chapter 4.4 "Connection to Test Object" on page 19.
1. Power on the instrument 2. Check (enable) “Use Profiles”
… and touch “OK”
3. Touch “Profil” 4. Touch “New”
5. Touch “New Transformer” 6. Define new Transformer parameters by
selecting the symbols at the bottom of screen
Then touch “Go”
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 17 of 139
7. Enter additional Data and touch “Back” 8. Touch “Caption” or the blue area above the
Result to change.
9. Choose a Caption... 10. … and touch “OK”
11. Start a Measurement as usual
WARNING!
Wait until the green light shows
"Safe" before disconnecting the
cables!
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 18 of 139
4.3 Selection the proper current range
Ensure that the test current does not exceed 10% of the rated winding current. This could cause
erroneous reading due to heating in the winding.
4.4 Connection to Test Object
Always check the winding schematic on the nameplate and trace the current path through the
windings.
You can save time if you measure the high voltage side in series with the low voltage side from the
same magnetic core. Because there are more turns on the high voltage side you reach much faster
saturation flux in the core. This helps to stabilize the measurement and saves time.
The potential leads must be connected in between the current leads. Do not clip the potential leads
to the current leads.
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 19 of 139
4.4.1 Single Phase Transformer, Vector Group 0
Measurement of HV and LV Winding
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Type WR100 / WR50 / WR14 Page 20 of 139
4.4.2 Three Phase Transformer, Δ - Δ Vector Group 0
Measurement of HV and LV Winding
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 21 of 139
4.4.3 Three Phase Transformer Δ - Y
Measurement of one LV Winding
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Type WR100 / WR50 / WR14 Page 22 of 139
4.4.4 Three Phase Transformer Δ - Y
Measurement of two LV Winding
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Type WR100 / WR50 / WR14 Page 23 of 139
5 Operation Elements
5.1 WR100
5.1.1 Front Panel WR100R
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 24 of 139
1: Display with Touch Panel
The instrument can be easily manipulated and fully controlled by the touch screen panel. If
preferred, an external mouse or keyboard can be connected to the USB Port to control the system.
2: Safety Indicator
Green Light on: System is in safe mode. Ready for handling connections.
Red Light on: Unsafe mode! Don’t remove any cables, there is Current flowing and Voltage
on the test leads!
The Transformer is not discharged!
3: Main Switch
Press to switch on / off
4: Emergency Stop
Press to stop: The measurement will stop and immediately start to discharge the Transformer.
Turn clockwise to release. The device will remain in a safe mode state.
5: USB Interface
Description see chapter 9.1.2 USB on page 103.
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 25 of 139
5.1.2 Rear Panel WR100R
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 26 of 139
1: Sense receptacle
Connection for the + and – Sense Cable for each channel to the test object
(Channel 3: only used on WR100-13)
2: Current receptacle
Connection for the + and – Current Cable to test object
3: USB Interface
2 x USB Host
1 x USB Device
See chapter 9.1.2 USB on page 103 for details
4: RS Interface
RS232
See chapter 9.1.1 RS 323 on page 102 for detail
5: Option
Serial Printer and +5V DC
See chapter 9.1.1 RS 323 on page 102 for details
6: Extern
This port can be used for an external warning device.
See chapter 9.1.3 Extern on page 104 for details
7: Temperature receptacle
These 3 receptacles are for the external temperature probes
(Optional Accessory TP01, TP03)
8: Fuses
1 fuse for each input main phase protects the WR100
Size 16A T (slow blow)
Use only the correct type fuse. Do not substitute.
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 27 of 139
9: Earth
This terminal is utilized to connect an additional earth ground (safety) line.
10: Power Cable
See chapter 5.1.2.1 Mains Connections for details
5.1.2.1 Mains Connections
5.1.2.1.1 Mains Plug
L1: Phase 1 (Brown)
L2: Phase 2 (Black)
L3: Phase 3 (Not connected)
N: Neutral (Grey)
(must be connected as neutral:
do not connect as a Phase!)
PE: Earth, Physical Earth
(Green/yellow)
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Type WR100 / WR50 / WR14 Page 28 of 139
5.1.3 Mains Connection Example for WR100R
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 29 of 139
5.2 WR50R
5.2.1 Front Panel WR50R
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 30 of 139
1: Display with Touch Panel
The instrument can be easily manipulated and fully controlled by the touch screen panel. If
preferred, an external mouse or keyboard can be connected to the USB Port to control the system.
2: Safety Indicator
Green Light on: System is in safe mode. Ready for handling connections.
Red Light on: Unsafe mode! Don’t remove any cables, there is Current flowing and Voltage
on the test leads!
The Transformer is not discharged!
3: Main Switch
Press to switch on / off
4: Emergency Stop
Press to stop: The measurement will stop and immediately start to discharge the Transformer.
Turn clockwise to release. The device will remain in a safe mode state.
5: USB Interface
Description see chapter 9.1.2 USB on page103
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 31 of 139
5.2.2 Rear Panel WR50R
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 32 of 139
1: Fuse and Main Input
A 16A T (slow blow) fuse protects the device. Use only the correct type fuse. Do not substitute.
2: Current receptacle
Connection for the + and – Current Cable to test object
3: USB Interface
2 x USB Host
1 x USB Device
See chapter 9.1.2 USB on page 103 for details
4: RS Interface
RS232
See chapter 9.1.1 RS 323 on page 102 for details
5: Sense receptacle
Connection for the + and – Sense Cable for each channel to the test object
(Channel 3: only used on WR50-13)
6: Temperature receptacle
These 3 receptacles are for the external temperature probes
(Optional Accessory TP01, TP03)
7: Extern
This port can be used for an external warning device.
See chapter 9.1.3 Extern on page 104 for details
8: Option
Serial Printer and +5V DC
See chapter 9.1.1 RS 323 on page 102 for details
9: Earth
This terminal is utilized to connect an additional earth ground (safety) line.
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 33 of 139
5.3 WR14R
5.3.1 Front Panel WR14R
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 34 of 139
1: Display with Touch Panel
The WR50 can be easily manipulated and fully controlled by the touch screen panel. If preferred,
an external mouse or keyboard can be connected to the USB Port to control the system.
2: Safety Indicator
Green Light on: System is in safe mode. Ready for handling connections.
Red Light on: Unsafe mode! Don’t remove any cables, there is Current flowing and Voltage
on the test leads!
The Transformer is not discharged!
3: Main Switch
Press to switch on / off
4: Emergency Stop
Press to stop: The measurement will stop and immediately start to discharge the Transformer.
Turn clockwise to release. The device will remain in a safe mode state.
5: USB Interface
Description see chapter 9.1.2 USB on page 103 for details.
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 35 of 139
5.3.2 Rear Panel WR14R
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 36 of 139
1: Sense receptacle
Connection for the + and – Sense Cable for each channel to the test object
2: USB Interface
2 x USB Host
1 x USB Device
See chapter 9.1.2 USB on page 103 for details
3: Temperature receptacle
These 3 receptacles are for the external temperature probes
(Optional Accessory TP01, TP03)
4: RS Interface
RS232
See chapter 9.1.1 RS 323 on page 102 for details
5: Fuse and Main Input
A 1.6A T (slow blow) fuse protects the WR14. Use only the correct fuse type to replace it.
6: Current receptacle
Connection for the + and – Current Cable to the test object
7: Option
Serial Printer and +5V DC
See chapter 9.1.1 RS 323 on page 102 for details
8: Extern
This port can be used for an external warning device.
See chapter 9.1.3 Extern on page 104 for details
9: Earth
This terminal is utilized to connect an additional earth ground (safety) line.
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 37 of 139
6 Operating Menu
The instrument software is straight forward and easy to set up and operate. With a few key strokes
and selections on the test screen, measurements can be started. See chapter 4 Quick Start Guide
on page 16. Even if the Profiles Mode is selected measurements can be made quickly.
To switch between the Standard mode and the Profiles mode press "Setup" and select the tab
"General". The following screen will appear where you can enable "Use Profiles":
The difference between Standard mode and the Use Profiles mode is how you ultimately store
your result.
Standard mode is for acquiring the measurement values of Resistance organized by date and time.
And the “Results” button appears on the main measurement screen as shown below. This is an
indication that the Standard mode is selected.
For more details see chapter:
6.1 Menu Structure without using Profiles on
page 40.
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 38 of 139
Profiles mode is for assigning the results to a transformer Profile. When Profiles mode is selected
the main measurement screen will display "Profile" in the lower right of the main screen instead of
"Results".
For more details see chapter:
6.2 Menu Structure Use Profiles on page 41 and
6.3.13 Profile on page 71
To learn more about these two methods of storing the results, go to chapter 6.1 Menu Structure
without using Profiles on page 40 or 6.2 Menu Structure Use Profiles on page 41.
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 39 of 139
6.1 Menu Structure without using Profiles
To work without using Profiles mode, turn off Profiles mode in the Setup menu by unchecking the
check box shown in chapter 6 Operating Menu on page 38.
The results will then be simply organized and saved by date and time without any transformer
information (Standard mode).
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 40 of 139
6.2 Menu Structure Use Profiles
*
To use Profiles mode, as described in this chapter, turn it on in the Setup menu by selecting the
check box shown in chapter 6 Operating Menu on page 38.
* Only available if an USB Key is connected to the instrument
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 41 of 139
6.2.1 Introduction to Transformer Profiles and Data Structure
There are many instruments that measure and offer the possibility to store the measured value.
This is a very useful feature which saves time and eliminates the possibility of errors of writing
down values by the operator. However, the measured data must be handled and organized in a
proper manner to be useful. Mishandling data collected by multiple operators and multiple
instruments could easily introduce errors and mistakes within the data sets.
The WR instruments offer another very powerful software tool for organizing and handling
transformers which are tested time and again. This allows building a history of a transformer.
Once a transformer record, or say a Profile, is created, then many measurements can be directly
attached to this record file. Manually logging, storing and sorting measurements will not be
necessary once a Profile is created.
The Profile of a transformer record contains the general header information and an attached result
contains the measurements of the transformer. Or to define it more exactly:
A transformer / profile contains:
• Number of winding systems
• Type of winding systems (Configuration)
• Rated voltages (primary, secondary, tertiary)
• Name plate info (name, serial number, location, manufacturer, type and remarks)
A measurement contains
• Measured results of all phases
• Date and time
• Operator name
Start by creating a new transformer Profile. Then measurements are made and stored (attached to
the Profile). In this case the profile and the actual measurement will be stored together.
Or you may load an existing transformer Profile then do the required measurements and store it. In
this case, the new measurement will be attached (stored) with the loaded or active transformer
Profile.
This is illustrated in the following scenario:
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Transformer Profile
(Header)
Measurement 1
(1. June 2010)
Measurement 2
(1. July 2010)
Measurement 3
(1. August 2010)
Load it
Do measurement
Measurement 4
(1. September 2010)
Measurement 4
(1. September 2010)
Save it
This shows a Transformer which was created and measured for the first time on June 1st 2010.
Then this transformer was measured again on the 1st of each month. This means that the
transformer Profile was loaded from the archive each time a measurement was required and done.
In the example above, it is the 1st of September. The transformer Profile is loaded (made active)
and a measurement is done. The new measurement data was saved and stored (linked) with the
transformer Profile. Thus creating a history for this particular transformer.
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6.3 Main Menu
6.3.1 Main Menu Screen
The Touch screen enables quick navigation by
pressing directly on the screen.
e.g. if you would like to change the current
range, press on the text "Range" and the Menu
Range will open. This is a short cut step to the
Range menu. Or access Range menu by going
through the Setup menu.
Start
Starts the measurement and the selected Current is applied.
Stop
Stops the measurement; DO NOT disconnect the measuring cables BEFORE the Green light is on
and the indication Safe appears. This button is active when Current is on (Start is active when
Current is off).
Store
Stores the results while the measuring Current is on.
Demag
Demagnetizes the core of a test object. See chapter 6.3.5
Setup
Goes directly to the Setup Menu. See chapter 6.3.6
Profile
5
Goes directly in the Profile Menu. See chapter 6.3.13
If you don't use Profiles, you will have the Result Button. See chapter 6.3.12
H1-H2
Enable or Disable measuring channel 1 by selecting the small box (next to caption H1-H2).
X1-X2
Enable or Disable measuring channel 2 by selecting the small box (next to caption X1-X2).
5 If you have not selected "Use Profiles" in the Setup menu, you will see "Results" instead of the “Profile” Button
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Status
Shows the measurement parameters
Temp. Correction
Shows the temperature parameters. Temperature variables can be modified by pressing the Setup
Button or directly in the text (--.-°C). See chapter 6.3.11
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6.3.2 Start
Press Start
Instrument starts to charge test object with the
selected current.
Maximum current is shown on the Range Status
bar.
6.3.3 Store
Press Store
Instrument stores the value shown in the
Display (R1, R2).
The Measurement doesn’t stop.
6.3.4 Stop
Press Stop
Instrument stops the measurement and begins
the discharge process.
DO NOT disconnect the measuring cables until
the green light is on and the indication Safe
appears.
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6.3.5 Demag
Demagnetization procedure to demagnetize the test object (e.g. transformer core)
Demag button appears after measurement is finished.
Press Demag
Select the demagnetizing current which is
usually the same current as the test current and
then press start.
Demagnetizing procedure runs automatically
For a technical description of the demagnetizing feature: See Appendix: Fehler: Referenz nicht
gefunden Fehler: Referenz nicht gefunden on Page Fehler: Referenz nicht gefunden.
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6.3.6 Setup
By pressing the Setup button, the Setup screen will appear.
Press the appropriate text box (Caption) in the main menu screen and the Setup-Screen will
automatically appear with tabs for selecting screens for Config, Mode, Range, Temperature
Correction or similar.
General
This screen allows the selection, modification and setting of the General Instrument parameters.
Config
This menu allows the changing of the caption of the channels.
If you use profiles you can select the windings you would like to measure. Also if a multiplexer is
selected, it will automatically control the system after this selection is made.
Mode
This screen allows the selection and setting of the measurement mode (single, continuous or
interval).
Range
This screen allows the selection, modification and setting of the range for the Test Current.
Temp. Corr.
This screen activates the temperature correction feature.
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6.3.7 General
From the Main screen, press Setup.
Then enter the General Setup Menu.
6.3.7.1 Mouse Cursor
Show or hide the Mouse Cursor. Useful if operating with a USB Interface mouse.
The mouse cursor appears automatically after the USB mouse is connected.
You can control the instrument with a USB mouse, track ball and/or keyboard.
6.3.7.2 Use Profiles
This allows operation of, or access to transformer profiles.
For more information see chapter 6.2 Menu Structure Use Profiles on page 41 or 6.1 Menu
Structure without using Profiles on page 40.
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6.3.7.3 Color
Shows the selected colors displayed on the
screen.
The User may change the colors on the touch
screen display by selecting appropriate colors
for each.
Default A: Black and white screen
Default B: Colored screen
Black and white may be selected on certain
outdoor conditions. For example bright sun light.
Select the corresponding color button to change the color:
Choose a color by selecting a predefined color
available.
Choose a color by manually adjusting the color
select bar.
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6.3.7.4 Length Correction
Length Correction
Change the measuring unit from Ohm to
Ohm/Length. The test results are then corrected
to the selected display method.
The length of the test object is predefined by the
customer. Enter the length of the test specimen.
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6.3.7.5 License
License Manager
The License Manager shows the validity of the
license for the use of the instrument, the Heat
Run Test, TbaseRemote, and TBaseSequenceSoftware.
If there is no valid license status displayed,
contact your local representative or Raytech
GmbH.
Extend the license
To modify or extend the license, enter a new
license code.
The license code is generated by
Raytech GmbH.
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6.3.7.6 Firmware update
New Firmware versions are available free of
charge at www.raytech.ch
Download the new Firmware (.zip file) onto your
USB key on the root directory (Not in a subdirectory and do not Unzip it).
Connect the USB key to the instrument and
press install. The system will detect and
automatically install the new firmware and
restart the system.
6.3.7.7 Language
The selection of language for the operating
menu can be made.
Restart the instrument to activate the desired
language selected.
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6.3.7.8 Clock Settings
Adjustment of the internal clock can be made.
Date:
By pressing the arrow the calendar will be
displayed. Select the date by pressing on the
actual day.
Time:
Select hour/minute/second by highlighting the
numbers in the clock.
Pressing the arrows the time will increase or
decrease.
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6.3.7.9 About
Shows the Firmware Version and
Serial-number of the instrument.
6.3.7.10 USB Printer
Certain external USB Printers can be
connected. Select the desired printer to print
results. Printers not listed are not supported.
For more Information see chapter Fehler: Referenz nicht gefunden Fehler: Referenz nicht
gefunden on page Fehler: Referenz nicht gefunden.
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6.3.7.11 Service Mode
There are several embedded codes to allow different settings, e.g. calibrate the touchscreen,
activate USB-driver and so on. For more information see chapter C Service Mode on page 118.
The Service Mode has a limited access.
Enter the corresponding code or exit directly by
pressing '#'.
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6.3.8 Config
The Config (Configuration) Menu may look differently depending upon if Profiles are selected or
not. For more information about using Profiles or to deactivate Profiles, see chapter 6 Operating
Menu on page 38.
6.3.8.1 With Profiles deactivated
6
In the tab Config you can change the name (Caption) of the measurement channels.
Click on on the white field to change the name
(Caption) of the measurement channels.
Enter a name.
6 Don't select "Use Profiles" in the Setup under "General"
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6.3.8.2 Using Profiles
7
When using Profiles you can select (name) what you want to measure on your test object. The
measurement results are then stored with the corresponding label in the right place.
This feature is very useful if utilizing a Raytech multiplexer which will automatically set the
appropriate relay. Thus, with a multiplexer, you connect the measurement cables to a Transformer
only once and all measurements are completed without changing any cables.
WS: Select the Winding System (1 Primary, 2
Secondary or 3 Tertiary side of the
Transformer). The configuration of the
appropriate winding can be made.
Caption: Select the point locations to be
measured.
7 Check the checkbox in the Setup under "General"
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Tap: If the transformer has Taps, select the Tap
to be measured.
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6.3.9 Mode
6.3.9.1 Single
Performs 1 single measurement
Stop condition:
Stops the measurement as soon as the result is
within the selected conditions.
(Example: within ±0.10% during 10 Seconds of
time)
6.3.9.2 Continuous
Performs continuous measurement until the
measurement is stopped by the user.
Quality Assistant:
If the result is within the selected parameters, a
green light in the main screen will illuminate and
indicate this condition.
If the result is out of the selected parameters, a
red light in the main screen will illuminate and
indicate this condition.
If the selected conditions are almost met, a
yellow light in the main screen will illuminate.
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6.3.9.3 Interval
Performs a selected number of measurements
(selected with “Count”) and stores result.
Interval Time:
The time (in Seconds) selected between 2 measurements. It will automatically store the result.
Count:
The number of measurements to be taken.
When all measurements are taken, the system halts and discharges the Transformer.
Fix Interval Time:
Selects the interval time from Start Time instead of from the 1st measurement point.
e.g. If the Interval Time is set to 10 seconds and the first measurement is taken at 27 seconds, the
system stores results at 27, 37, 47...seconds if the check-box is not checked. If the check-box is
checked, the results will be taken and stored at 27, 30, 40, 50...seconds.
Note:
The current remains ON for the duration of the test and automatically stops after “Count” number of
measurements are taken.
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Quality Assistant:
If the result is within the selected parameters, a green light in the main screen will indicate this
condition and automatically store the result.
In the interval mode, the selected Interval measurement start recording results.
If the result is out of the selected parameters, a red light in the main screen will indicate this
condition. No results stored.
If the selected conditions are almost met, a yellow light in the main screen will illuminate and
indicate this condition. No results stored.
Auto Print Results
8
If this feature is selected, the instrument will also output to a connected printer when the
measurements are stored.
AutoSave USB:
The results will also be stored on a USB Key if connected to the instrument during a measurement.
8 Not available in WR14
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6.3.10 Range
Selects the current range9 for the measurement.
Auto Close Setup:
Closes the Setup Window after the Current
Range selection is made without pressing OK.
The 3 frames located on the right side are reserved for User specified Current settings.
For adjusting the User Settings:
Press “Set”
Adjust all 3 settings by moving the cursor left or
right to the desired Current level. Press OK
when finished.
9 The maximum current of the WR50 is 50A
The maximum current of the WR14 is 15A
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6.3.11 Temperature Correction
Activated:
Temperature correction is activated when the
box is marked. The displayed test value then is
a calculated result dependent upon parameters
selected.
Coefficient:
Choose the temperature coefficient of the material to be measured; Either CU (copper), AL
(aluminum) or User defined. Temperature correction parameters are then displayed on the touch
screen panel.
Reference value:
The reference (base) temperature is the temperature correction factor that is referred to.
Channels:
This allows the user to select which measurement channel (temperature probe or external
temperature meter) that the temperature correction is applied to. If the required selection is more
than one channel, then the average value of the selected measurement channels is calculated.
Ext.:
Manual input of an external measured temperature. For example, an external temperature meter.
Example for calculation:
In the example below the measurement object is Copper and will be corrected to 25 degrees
Celsius based on the temperature input of temperature channel 1.
If a temperature probe (TP-01) is not available, activate the “Ext” box and fill in the temperature of
the test object that was measured with an external temperature meter.
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The correction formula:
Rs = Rm
Ts + Tk
Tm + Tk
Rs Resistance corrected
Rm Measured resistance
Ts Desired reference temperature
Tm The temperature at which resistance was/is measured
Tk 234.5 for copper
225.0 for aluminum
(aluminum may be as high as 240)
Alternative: Correction with “alpha25” to calculate Tk with the formula:
Tk =
1
alpha25
− 25
When Temperature correction is activated the Main Test screen appears as below:
The “T” in the measuring channel box shows
that the displayed resistance value is corrected.
In this example it is corrected to 25 °C using Tk
of Copper and referring to Temperature probe 1.
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To view the actual result without the temperature correction, Press the “T” during the
measurement:
The “crossed” “T” shows that the displayed
resistance value is NOT corrected.
The corrected AND the uncorrected values are
stored in memory whether or not the correction
is activated in the display.
If the display shows a crossed Red T, the result
is not corrected because a temperature probe is
missing or not recognized by the system.
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6.3.12 Results
10
The Results button appears on the main screen in the lower right hand corner. Press the Results
button to view results in Standard mode. If Profiles mode has been turned on, then the “Results”
button on the main screen changes to “Profile”. The Profile results can be found under the tabs:
Profile, Info, Results.
Shows the overview of the measurements which
are sorted by Date/Time.
You can select multiple results.
10 See chapter 6 Operating Menu on page 38 how you can select it
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6.3.12.1 Details
After selecting results, press Details and view
the screen with details of the selected
measurements.
If no measurements were selected, the details
of all stored measurements are displayed.
Return to the results overview by selecting
"Header".
Caption: This is the caption (name) of the measurement channel
Rmeas: This is the measurement Result without a temperature correction.
Rcorr: This is the temperature corrected measurement result.
T1-T3: The temperature of the probes
Text: Manual input of temperature value (measured with an external temperature meter).
Scroll to the right to view additional details.
Itest: The measurement current.
Ch: The channel which measured the result.
Time: Time between the start of the measurement and memory storage.
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6.3.12.2 Diagram
Select Diagram to analyze the measurement
graphically.
A graph displayed as a function of time (e.g.
cooling curve of a transformer)
The Analysis11 button is only available with the option HRT (Heat Run Test).
For an explanation see chapter 7.2 Heat Run Test Software on page 80.
The license code for the Heat Run Test is available from Raytech or a Raytech representative.
Print: Prints the graph on the panel mount (internal) Printer.
Save12: Press Save and the graph will be stored on the USB Key as a gif file. For more information
see chapter 7.2.3.1 on page 86.
Esc: Returns to the result details.
11 Only available if the diagram is a function of time
12 Only available if the diagram is a function of time
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6.3.12.3 Print / Export
Print / export the selected measurements. If no measurements are selected, the entire memory will
be printed or exported.
Press "Print" to print the results.
Press “Export CSV” to export the data in a csv
file.
If you choose "Export CSV", the selected data will be exported in a CSV file that is named with the
serial number of the instrument and the date and time. You can locate the file in the directory:
Raytech\EXPORT on the USB Key.
To select the CSV Separator, see chapter C.3 CSV Separator on page 120.
6.3.12.4 Esc
"Esc" returns to the main screen.
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6.3.13 Profile
13
Press Profile in the main screen to get an overview of the different transformer profiles.
NOTE:
For an introduction to Transformer Profiles and Data Structure see chapter
6.2.1 on page 42.
You can switch between the Active profile, Internal profiles (stored internally on the instrument) or
profiles stored on a USB Key.
This is an example of the Active transformer
Profile.
This is an example of Profiles stored on a USB
Key.
13 "Use Profile", see chapter 6 Operating Menu on page 38
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6.3.13.1 Create a new Profile
Press new on the tab "Active". A message appears asking if you want to create a completely new
transformer Profile or just make a new measurement under the Active Profile.
Select "New Transformer"
First select the configuration of the Primary winding of the transformer. Choose the corresponding
configuration of your transformer Primary side from the Setup menu shown below. After selection,
the instrument will display the Primary configuration in the highlighted box and automatically move
to the next highlighted box to select the Secondary winding of the transformer.
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Winding configurations set here
Choose from here
Taps:
Tap changer positions can also be defined for every winding system.
Touch the check box beside the text "No. Tap"
(Number of Taps) below the transformer coil that
you wish to enter the number of Tap positions.
A screen appears to allow the setting of the number of tap changer position steps.
Use the arrows "<" or ">" to increase or
decrease first and last tap steps.
The First Tap setting (-2 shown): Lower Taps
The Last Tap setting (5 shown): Upper Taps
The total number of Taps selected will be
displayed above OK
Confirm with OK to set ( e.g. 8) Taps. View the number of Taps in this Transformer setup screen.
Your Transformer may have Tap positions on
the Primary and on the Secondary windings.
Use the same procedure to define the
Secondary Tap positions.
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Tertiary Winding System:
Transformers may have a Primary, Secondary and Tertiary winding. Activate the “Tertiary” option,
by touching the check box.
Buttons appear for the additional winding.
And of course, it is also possible to define Tap
positions for this third winding.
When all parameters are complete, press "Go" to create a new Profile.
To generate this transformer as a template press " ->Temp". For more information about templates
see chapter "Working with Templates" on page 76.
Press "Go" to view the screen to fill in the data
from the nameplate of the transformer.
The default Name is the date and the time. This
can be edited.
Select the field you would like to change/edit
and use the screen to change the value or
connect a USB Keyboard to the instrument.
Press “Close” after the name is entered.
Select another field to edit/change.
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Select 'Info' for more information about the
transformer.
This is the location where additional information
about the transformer can be added.
6.3.13.2 Load Transformer Profile from Archive
When preparing to test a transformer check to see if its Profile is already stored internally in the
instrument or on a USB (key) memory stick. “Use Profiles” must be selected in the General Tab
under Setup. The USB key tab will only be shown if a USB key is inserted in the instrument.
Touch the tap (Intern or USB Key) and select
the transformer you would like to load.
The blue tinted Profile is the active Transformer.
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6.3.13.3 Working with Templates
When testing many of the same transformers, it is possible to create a new transformer Profile as a
Template. Creating a Profile Template allows editing of parameters, Names, s/n etc..
NOTE:
Use this option, if you have to measure many transformers of the same
type.
To make a Template review the instructions on making a Profile in chapter 6.3.13.1 Create a new
Profile on page 72 but after all parameters have been entered press "->Temp" instead of "Go".
After creating a new Profile and pressing “->
Temp”, rename the template with another name
other than the date and the time which are
displayed by default.
Edit any other information (Type, Location etc)
as required for the Template.
The new profile will be created with a minimum
of information, and it will be stored in the archive
of the instrument. In the S/N (serial number)
field, The name "Template" will be entered by
default.
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Template Profiles can be cloned in the Archive
menu. The instrument creates a Transformer
Profile based on the template.
Highlight the Template profile and the “Clone”
button will appear in the display.
It is only possible to Clone a Profile that was
saved as a Template. Newly cloned Profiles
cannot be cloned.
You will be asked to enter a new transformer
name and then the serial number for the newly
cloned Profile.
Enter the Transformer Name and then the Serial
Number then touch “Close” to save the Profile.
After entering this information you have a new Profile to work with.
It's useful to use this sequence of cloning when there are numerous transformers of the same type.
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6.3.13.4 Diagram
Select Diagram to analyze the measurements
graphically.
Displayed is a graph as a function of time (e.g.
cooling curve of a transformer)
With a Tap changer, the curve is a function of
the Taps. In this example there are 3 Taps.
14
14 F(Tap) is only available if you are working with profiles
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7 Options
7.1 Temperature Measurement
Raytech WR series Instruments are very accurate and precise test systems. To take full advantage
of this high accuracy, the recording of the temperature of the device under test is highly
recommended. This is due to the characteristics of the increase in resistance of a metallic object
as its temperature increases. Incorporated into the system are temperature compensation tables
for Copper and Aluminium. These tables are used to automatically calculate the conversion factor
to a known reference temperature.
Temperature Correction Settings: see chapter 6.3.11 on page 64.
The system allows up to three (3) temperature probes to be used for the purpose of recording
temperatures. Optional Part Number: TP01, can be purchased for this purpose.
TP01 temperature probe is mounted to a flexible cable that plugs into the rear panel of the WRinstruments. This option enables the user to record the ambient temperature and/or the actual
temperature of the device under test. A set of three (3) temperature probes (TP03) can be ordered
to allow complete temperature measurements at three different reading points.
The Instrument will automatically detect when a TP 01 probe is connected. The temperature will be
displayed on the instrument screen during a test and will appear on the printed report. The
temperature, as well as the test results, can be saved into memory.
As soon as a temperature probe is connected,
the value is displayed on the main screen and
will automatically be stored to the correspondent
resistance value.
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7.2 Heat Run Test Software
The Heat Run Test Software, option AHRT 01, is used to analyse the measurement results of the
copper loss test of the windings of a transformer and to calculate the resistance values of the
winding at the working temperature (time zero).
7.2.1 Introduction
The Heat Run Test (HRT) performs a measurement during the cooling curve of a transformer after
the transformer has been heated.
The measurement is made in the interval15 mode without temperature correction.
In the Setup Menu the following settings must be made:
Activate “Interval Mode“ and select the interval
time. Select the time in seconds between
measuring points (Interval Time) and the
number of data points (Count).
Disable the Quality Assistant
The Temperature correction must be
deactivated for heat run testing
15 See chapter 6.3.9.3 Interval on page 61
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7.2.2 Measurement with interval mode for HRT
The heat run timer must be started the moment
that the heat source is switched off from the test
object.
Press the “Timer” Button on the main screen to
start the timer.
The timer starts running.
The timer can be halted, at any time, by
pressing the button a second time.
Note: The test current is NOT switched on at
this time.
After starting the timer, disconnect the power
cables or heat source of the test object and
connect the measurement cables of the
instrument.
Measurement results should be obtained as
quickly as possible.
After the measuring cables are attached to the
transformer windings, press “START” to start
the measurement.
The current is applied and the system charges
the transformer winding(s) to be measured.
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After charging the transformer, the instrument
system monitors the measurements until the
results are stable.
The results are then stored automatically.
Press the “Stop” Button, at any time, to halt the
measurement.
After storing the last measurement the
instrument turns off the output Current, stops
the measurement and automatically discharges
the transformer until the test object is safe.
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Although the measurement is finished, the timer
continues to operate. This allows further
measurements on other windings of the same
transformer.
The timer can be halted, at any time, by
pressing the Timer button.
7.2.3 Analysing the HRT Results
Select the measurement results you would like to analyse.
Analyses of the recorded data is slightly different if Profiles mode has been used or not. If Profile
mode has been used, See chapter 6.3.13 For more information. If Profiles are not being used, see
chapter 6.3.12.
Profiles: From the main screen select
- Profiles
- the transformer
- Info
- the measurement number
- Result
- the measurement date
- Diagram
No Profiles: From the main screen select
- Results
- the measurement date
- Diagram
Displayed on the screen are the selected results
shown graphically.
If you have the Heat Run Test Software license,
the Button "Analysis" is visible and can be
selected for the calculation.
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Press “Analyse”
You’ll be asked for the “Approximation” Model to
calculate the value of the Winding at time =
zero.
Select the Approximation Model:
Exp (Exponential) or Linear
After selecting the Model press “Analyse”
The value and the graph of the approximation
R(t=0) is shown.
Linear Approximation:
R0: Winding Resistance at time t = zero
m: Slew rate dr/dt in %/ min
Cor: Correlation of the approximation
Exponential Approximation:
R0: Winding resistance at time t = zero
Rinf: Winding resistance at time t = ∞
tau: Time constant
Cor: Correlation of the approximation
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 84 of 139
You can Print the Graph with the approximation
or Save the calculated values to the
corresponding results.
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 85 of 139
7.2.3.1 Save the HRT approximation
Select the "Save" button to store the calculated values and Graph as a graphical interchange
format file (gif).
The values of the corresponding measurement
are stored under Remarks.
Double-click on the highlighted measurement to
open a new window with the calculated results.
The gif file is attached to the measurement data. If you export the data to a USB Key, the file will
be located in the directory \RAYTECH\DATA\Transformername\
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 86 of 139
7.2.3.2 Showing the graph in °C
When the resistance of the winding at any specific temperature and the material is known, all the
values can be displayed as °C.
Enter the resistance value (Rcold) of the
winding, the corresponding temperature (Tref)
and the temperature coefficient of the
conductor.
The approximation and the values are shown as Temperature.
Linear Approximation:
T0: Temperature at time t = zero
m: Slew rate dt/dt in °/ min
Cor: Correlation of the approximation
Exponential Approximation:
T0: Temperature at time t = zero
R∞: Temperature at time t = ∞
tau: Time constant
Cor: Correlation of the approximation
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 87 of 139
Select "Show Formula" you will have a window
after the calculation with all results
Selecting "Show Formula" displays the
calculated results
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 88 of 139
7.3 Battery Option WR14R
16
The WR14R is available with Battery and/or Mains operation.
With the battery operating feature, the measurement will not halt if power is interrupted on the
mains input. This feature is very helpful if continuous tests are being conducted. e.g. heat run tests.
If you have the Battery Option, there is a Battery
Symbol on the top of the main screen. It
indicates the Battery status and the charging
condition.
With a full Battery you are able to measure 200
single measurements at 15 Amperes.
Mains supply present
A Mains (plug) connector symbol shown inside the Battery and the green LED on the power switch
is Blinking. This indicates that the system is connected to the mains.
Battery charging
The area inside the Battery indicator moves from the left to the right with a blinking green LED on
the Mains power switch indicating that the battery is being charged.
Charging condition
Visual indication of the area inside the Battery indicator dictates the charging condition:
If the Battery area is completely filled green, the Battery is 100% charged.
16 This Option is standard in the WR14 (field case version)
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 89 of 139
Low Battery
If the battery is low on charge a Battery warning
message will be displayed.
If conducting a measurement and this message
appears, the measurement doesn’t stop, but
you are not able to start a new measurement
until the mains supply is connected.
Very low Battery
If the battery charge is extremely low, the WR14
displays a second warning message and
powers down the system until a mains supply is
connected.
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 90 of 139
7.4 Cable extension WR100
7.4.1 WRO112
The WR100-12R is available with the optional 10m cable extension sets for the Plug type cable
sets (Note: Cable sets with the ring lug connectors do not have this option available). The Plug
type connector locking system operates on the “push-pull” principle. It self locks when connected.
To disconnect the Plug type connector, push in first then pull out.
Connectors that become dirty should be cleaned with industrial alcohol before connecting.
The WRO112 consists of the following cables:
2x 10m Extensions for the
Current cables
2x 10m Extensions for the
Potential cables: Channel 1
2x 10m Extensions for the
Potential cables: Channel 2
It is possible to connect multiple 10m extensions together to increase the length.
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 91 of 139
7.4.2 WRO113
The WR100-13R is available with the optional 10m cable extension sets for the Plug type cable
sets (Note: Cable sets with the ring lug connectors do not have this option available). The Plug
type connector locking system operates on the “push-pull” principle. It self locks when connected.
To disconnect the Plug type connector, push in first then pull out.
Connectors that become dirty should be cleaned with industrial alcohol before connecting.
The WRO113 consists of the following cables:
2x 10m Extensions for the
Current cables
2x 10m Extensions for the
Potential cables: Channel 1
2x 10m Extensions for the
Potential cables: Channel 2
2x 10m Extensions for the
Potential cables: Channel 3
It is possible to connect multiple 10m extensions together to increase the length.
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 92 of 139
7.5 Cable extension WR50
7.5.1 WRO102
The WR50-12R is available with the optional 10m cable extension sets for the Plug type cable sets
(Note: Cable sets with the ring lug connectors do not have this option available). The Plug type
connector locking system operates on the “push-pull” principle. It self locks when connected. To
disconnect the Plug type connector, push in first then pull out.
Connectors that become dirty should be cleaned with industrial alcohol before connecting.
The WRO102 consists of the following cables:
2x 10m Extensions for the
Current cables
2x 10m Extensions for the
Potential cables: Channel 1
2x 10m Extensions for the
Potential cables: Channel 2
It is possible to connect multiple 10m extensions together to increase the length.
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 93 of 139
7.5.2 WRO103
The WR50-13R is available with the optional 10m cable extension sets for the Plug type cable sets
(Note: Cable sets with the ring lug connectors do not have this option available). The Plug type
connector locking system operates on the “push-pull” principle. It self locks when connected. To
disconnect the Plug type connector, push in first then pull out.
Connectors that become dirty should be cleaned with industrial alcohol before connecting.
The WRO103 consists of the following cables:
2x 10m Extensions for the
Current cables
2x 10m Extensions for the
Potential cables: Channel 1
2x 10m Extensions for the
Potential cables: Channel 2
2x 10m Extensions for the
Potential cables: Channel 3
It is possible to connect multiple 10m extensions together to increase the length.
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 94 of 139
7.5.3 WRO402
The WR14 is available with the optional 10m cable set instead of the 5m standard cable set.
The WRO402 consists of the following cables:
2x 10m Current cables
2x 10m Potential cables
Channel 1
2x 10m Potential cables
Channel 2
When ordering optional WRO402 with a new system, the standard 5m cable set is omitted.
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 95 of 139
8 Technical Specifications
8.1 WR100
17
Type
Size
Weight
Input Power
Output Voltage
Test Current
Panel Display
Front Panel
Interface
Memory Storage
Resistance Range:
WR100-12R / WR100-13R
L: 490 mm (19.3”) W: 436 mm (17.2”) (19” Rack) H: 310 mm (12.2”)
Rack Unit: 7U
21.9 kg (48.3 lbs.)
2 x 90-264 VAC 47-63 Hz, 2 Phase plus Neutral (3 kW max.)
0 to 50V DC
User Selectable: 0.025 ….. 100 Ampere
Color LCD with back lighting and touch screen
Sealed anodized.
4 x USB 1.1 (3 host / 1 device) and 9 Pin RS232 serial
Stores up to 10000 complete test results
0.00 μΩ to 100 kΩ
Operating Temperature
Storage Temperature
-10°C to 60°C
-20°C to 70°C
Current Range Measuring Range Accuracy Resolution
30 - 100A 0.00μΩ - 2.7Ω ± 0.1% Rdg ± 0.05μΩ 5 Digits or 0.05μΩ
15 - 30A 0.0μΩ - 3.3Ω ± 0.1% Rdg ± 0.1μΩ 5 Digits or 0.1μΩ
8 - 15A 0.0000mΩ - 6.3Ω ± 0.1% Rdg ± 0.2μΩ 5 Digits or 0.2μΩ
3 - 8A 0.0000mΩ - 16.7Ω ± 0.1% Rdg ± 0.5μΩ 5 Digits or 0.5μΩ
1 - 3A 0.000mΩ - 47.2Ω ± 0.1% Rdg ± 1μΩ 5 Digits or 1μΩ
0.7 - 1A 0.000mΩ - 71.4Ω ± 0.1% Rdg ± 2μΩ 5 Digits or 2μΩ
0.3 - 0.7A 0.000mΩ - 167Ω ± 0.1% Rdg ± 5μΩ 5 Digits or 5μΩ
0.1 - 0.3A 0.00mΩ - 500Ω ± 0.1% Rdg ± 10μΩ 5 Digits or 10μΩ
25 - 100mA 0.00mΩ - 2kΩ ± 0.1% Rdg ± 20μΩ 5 Digits or 20μΩ
- 25mA 2kΩ - 10kΩ ± 0.2% Rdg ± 200mΩ 5 Digits or 200mΩ
- 25mA 10kΩ - 100kΩ ± 0.8% Rdg ± 20Ω 4 Digits or 20Ω
17 Specifications are subject to change without any notice
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 96 of 139
Features
- Charges inductive loads up to 1500 Henry- Heavy-duty protection circuitry
- Simple touch screen operation
- Data exchange with an USB-Key
- 3 Temperature channels
- High power DC Supply (100A/50V)
- DC Current adjustable for resistance values from 0.00μΩ to 100kΩ
- Fastest Discharge unit on market (more than 10 times faster)
- Discharge Indicator – visible and audible indicator for discharge status
- Demagnetizing Circuit
- Warning device output to show “transformer under test”
- Emergency stop push button immediately turns off power and starts discharging
- Data transfer to internal Printer
- Data Storage of up to 10000 measurements
- Fastest discharge time in the market
- 2 Year standard warranty
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 97 of 139
8.2 WR50
18
Type
Size
Weight
Input Power
Output Voltage
Test Current
Panel Display
Front Panel
Interface
Memory Storage
Resistance Range
WR50-12R / WR50-13R
L: 490 mm (19.3”) W: 436 mm (17.2”) (19” Rack) H: 177 mm (7”)
Rack Unit: 4U
16.6 kg (36.6 lbs.)
90-264 VAC (1.5 kW max.) 47-63 Hz, automatic ranging
0 to 50V DC
User Selectable: 0.025 ….. 50 Ampere.
Color LCD with back lighting and touch screen.
Sealed anodized.
4 x USB 1.1 (3 host / 1 device) and 9 Pin RS232 serial
Stores up to 10000 complete test results
0.00 μΩ to 100 kΩ
Operating Temperature
Storage Temperature
-10°C to 60°C
-20°C to 70°C
Current Range Measuring Range Accuracy Resolution
30 - 50A 0.00μΩ - 1.3Ω ± 0.1% Rdg ± 0.05μΩ 5 Digits or 0.05μΩ
15 - 30A 0.0μΩ - 3.3Ω ± 0.1% Rdg ± 0.1μΩ 5 Digits or 0.1μΩ
8 - 15A 0.0000mΩ - 6.3Ω ± 0.1% Rdg ± 0.2μΩ 5 Digits or 0.2μΩ
3 - 8A 0.0000mΩ - 16.7Ω ± 0.1% Rdg ± 0.5μΩ 5 Digits or 0.5μΩ
1 - 3A 0.000mΩ - 47.2Ω ± 0.1% Rdg ± 1μΩ 5 Digits or 1μΩ
0.7 - 1A 0.000mΩ - 71.4Ω ± 0.1% Rdg ± 2μΩ 5 Digits or 2μΩ
0.3 - 0.7A 0.000mΩ - 167Ω ± 0.1% Rdg ± 5μΩ 5 Digits or 5μΩ
0.1 - 0.3A 0.00mΩ - 500Ω ± 0.1% Rdg ± 10μΩ 5 Digits or 10μΩ
25 - 100mA 0.00mΩ - 2kΩ ± 0.1% Rdg ± 20μΩ 5 Digits or 20μΩ
- 25mA 2kΩ - 10kΩ ± 0.2% Rdg ± 200mΩ 5 Digits or 200mΩ
- 25mA 10kΩ - 100kΩ ± 0.8% Rdg ± 20Ω 4 Digits or 20Ω
18 Specifications are subject to change without any notice
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 98 of 139
Features
- Charges inductive loads up to 1500 Henry
- Heavy-duty protection circuitry
- Simple touch screen operation
- Data exchange with an USB-Key
- 3 Temperature channels
- High power DC Supply (50A/50V)
- DC Current adjustable for resistance values from 0.00μΩ to 100kΩ
- Fastest Discharge unit on market (more than 10 times faster)
- Discharge Indicator – visible and audible indicator for discharge status
- Demagnetizing Circuit
- Warning device output to show “transformer under test”
- Emergency stop push button immediately turns off power and starts discharging
- Data transfer to external Printer
- Data Storage of up to 10000 measurements
- Fastest discharge time in the market
- 2 Year standard warranty
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 99 of 139
8.3 WR14
19
Type
Size
Weight
Input Power
Output Voltage
Test Current
Panel Display
Front Panel
Interface
Memory Storage
Resistance Range
WR14-R
L: 395 mm (15.6”) W: 436 mm (17.2”) (19” Rack) H: 177 mm (7”)
Rack Unit: 4U
7.9 kg (14.7 lbs.)
90-264 VAC 47-63 Hz, or 12V DC (charging only)
0 to 30V DC
User Selectable: 0.025 ….. 15 Ampere
Color LCD with back lighting and touch screen
Sealed anodized
4 x USB 1.1 (3 host / 1 device) and 9 Pin RS232 serial
Stores up to 10000 complete test results
0.00 μΩ to 100 kΩ
Operating Temperature
Storage Temperature
-10°C to 60°C
-20°C to 70°C
Current Range Measuring Range Accuracy Resolution
10 - 15A 0.00μΩ - 1Ω ± 0.1% Rdg ± 0.1μΩ 5 Digits or 0.05μΩ
5 - 10A 0.0μΩ - 3Ω ± 0.1% Rdg ± 0.2μΩ 5 Digits or 0.1μΩ
1 - 5A 0.0000mΩ - 15Ω ± 0.1% Rdg ± 0.5μΩ 5 Digits or 0.5μΩ
0.5 - 1A 0.000mΩ - 30Ω ± 0.1% Rdg ± 2μΩ 5 Digits or 1μΩ
0.1 - 0.5A 0.000mΩ - 300Ω ± 0.1% Rdg ± 5μΩ 5 Digits or 2μΩ
25 - 100mA 0.00mΩ - 1200Ω ± 0.1% Rdg ± 20μΩ 5 Digits or 10μΩ
- 25mA 1.2kΩ - 10kΩ ± 0.1% Rdg ± 100mΩ 5 Digits or 200mΩ
- 25mA 10kΩ - 100kΩ ± 0.5% Rdg ± 10Ω 4 Digits or 20Ω
19 Specifications are subject to change without any notice
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14 Page 100 of 139
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