Raytech WR14 User manual

INSTRUCTION MANUAL
MODEL: WR14 & WR50-12/13
WINDING RESISTANCE METERS
RAYTECH USA, INC.
118 SOUTH 2ND STREET, PERKASIE, PA 18944 USA
T: 267 404 2676 | F: 267 404 2685 | WWW.RAYTECHUSA.COM
VERSION 3.03
WR14: 15AWINDING RESISTANCE METER
WR50-12/13: 50A WINDING RESISTANCE METER

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WR14 / WR50-12/13 Winding Resistance Meter Instruction Manual
Version 3.03
TABLE OF CONTENTS
Safety Precautions........................................................................................................................................5
Unpacking .....................................................................................................................................................6
WR50.........................................................................................................................................................6
WR14.........................................................................................................................................................7
Introduction....................................................................................................................................................8
General......................................................................................................................................................8
Advantages & Features.............................................................................................................................9
System Details...........................................................................................................................................9
System Check........................................................................................................................................9
Limitations of Winding Resistance Testing............................................................................................9
Discharging the Transformer Windings ...............................................................................................10
Low Resistance Testing.......................................................................................................................10
Quick Start Guide........................................................................................................................................11
Instrument Operation –Profiles Deactivated...........................................................................................11
Instrument Operation –Using Profiles ....................................................................................................12
Selection of the Proper Current Range ...................................................................................................14
Connection to the Test Object.................................................................................................................14
Single Phase Transformer, Vector Group 0.........................................................................................15
Three Phase Transformer, Δ–ΔVector Group 0 ...............................................................................16
Three Phase Transformer Δ–Y, One LV Winding .............................................................................17
Three Phase Transformer Δ–Y, Two LV Winding .............................................................................18
Operation Elements for field units...............................................................................................................19
WR50 Front Panel Overview:.................................................................................................................19
WR50 Control Elements and Connections..............................................................................................19
Fuse, Mains Input and Switch..............................................................................................................19
Emergency Stop ..................................................................................................................................19
Thermal Printer ....................................................................................................................................19
Safety Indicator....................................................................................................................................20
Display With Touch Panel....................................................................................................................20
Potential Receptacle............................................................................................................................20
Current Receptacle..............................................................................................................................20
External................................................................................................................................................20
Ground Terminal..................................................................................................................................20
Temperature Receptacle .....................................................................................................................20
Interface...............................................................................................................................................20
WR14 Front Panel overview....................................................................................................................21

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WR14 Control Elements and Connections..............................................................................................21
Charge Indicator and Main Switch.......................................................................................................21
Interface...............................................................................................................................................21
Thermal Printer ....................................................................................................................................21
Display With Touch Panel....................................................................................................................21
Ground Terminal..................................................................................................................................22
External................................................................................................................................................22
Temperature Receptacle .....................................................................................................................22
Potential Receptacle............................................................................................................................22
current Receptacle...............................................................................................................................22
Safety Indicator....................................................................................................................................22
Emergency Stop ..................................................................................................................................22
Mains Input ..........................................................................................................................................22
Operating Menu ..........................................................................................................................................23
Menu Structure Without Using Profiles ...................................................................................................25
Menu Structure Using Profiles.................................................................................................................26
Introduction to Transformer Profiles and Data Structure.....................................................................27
Main Menu...............................................................................................................................................29
Main Menu Screen...............................................................................................................................29
Start......................................................................................................................................................31
Store.....................................................................................................................................................31
Stop......................................................................................................................................................31
Demag .................................................................................................................................................32
Setup....................................................................................................................................................33
Results.................................................................................................................................................52
Profile...................................................................................................................................................56
Options........................................................................................................................................................64
Temperature Measurement.....................................................................................................................64
Heat Run Test Software..........................................................................................................................65
Introduction ..........................................................................................................................................65
Measurement with Interval Mode for HRT...........................................................................................66
Analyzing the HRT Results..................................................................................................................68
Battery Option - WR14R..........................................................................................................................73
Cable Extensions for WR100R................................................................................................................75
10M Cable Extension Set for the WR100-12R....................................................................................75
10M Cable Extension Set for the WR100-13R....................................................................................76
Cable Extensions for WR50R..................................................................................................................77

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10M Cable Extension Set for the WR50-12R......................................................................................77
10M Cable Extension Set for the WR50-13R......................................................................................78
10M Cable Extension Set for the WR14-R..........................................................................................79
Technical Specifications..............................................................................................................................80
WR50.......................................................................................................................................................80
WR14.......................................................................................................................................................82
Interfaces.....................................................................................................................................................84
Hardware.................................................................................................................................................84
RS 232.................................................................................................................................................84
USB......................................................................................................................................................84
Extern...................................................................................................................................................85
Appendix .....................................................................................................................................................88
Raytech T-Base Pro....................................................................................................................................89
Description...............................................................................................................................................89
Application Example................................................................................................................................90
Concept of T-Base Pro............................................................................................................................92
Components of T-Base Pro.....................................................................................................................92
T-Base Pro –Totally FREE .................................................................................................................92
Create your Add-On with T-Base SDK................................................................................................92
T-Base Pro Remote Option for Raytech Devices................................................................................93
Proprietary Add-On: Sequence............................................................................................................93
Proprietary Add-On: Remote I/O to External Software........................................................................93
Graphical User Interface..........................................................................................................................94
USB Driver for T-Base Pro......................................................................................................................95
Software Development Kit (SDK)................................................................................................................96
Service Mode ..............................................................................................................................................97
Calibrate Touchscreen ............................................................................................................................97
Show Ground Warning............................................................................................................................98
CSV Separator ........................................................................................................................................99
Raytech USB Driver for T-Base.............................................................................................................100
ActiveSync for Toolbox......................................................................................................................100
Command Syntax......................................................................................................................................101
Serial Interface ......................................................................................................................................101
USB Interface ........................................................................................................................................102
USB Printer Info ........................................................................................................................................103
Printer Requirements.............................................................................................................................103
Driver.....................................................................................................................................................103

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Interface.................................................................................................................................................103
Suggested Printers................................................................................................................................103
Measuring High- and Low- Voltage Sides in Series .................................................................................104
Measuring with 2 WR Meters at the Same Time ......................................................................................107
Demagnetizing ..........................................................................................................................................109
Energizing Magnetized Transformers ...................................................................................................109
Conclusion.............................................................................................................................................109
Consequences of Energizing a Magnetized Transformer.....................................................................109
Procedure for Eliminating the Magnetized State of a Transformer.......................................................110
Parameters for Demagnetizing..............................................................................................................110
Multiplexer.................................................................................................................................................111
Error Messages.........................................................................................................................................112
Trouble Shooting.......................................................................................................................................114
Warranty Conditions..................................................................................................................................116
Limitation of Warranty............................................................................................................................117
Arbitration ..............................................................................................................................................117
Contact Information:..................................................................................................................................118

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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 and its affiliates assume 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:
Read this manual carefully before operating the system. The WR14 is battery operated, the WR50-12
and the WR50-13 are line operated. They operate from a wide range of power input from 90 to 264Vac
and 47…63Hz with automatic ranging.
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.
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 the power
cable connected. To avoid injuries, always disconnect power, discharge circuits, and remove external
voltage sources before touching components.
WARNING!
Never connect the instrument to an energized transformer.
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.

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UNPACKING
Unpack your new instrument and check to see that you have the following standard items:
WR50
Instrument
Cable Bag
Current Cables
Jumper Cable(s)
Power Cord
5 Printer Refill Rolls
Potential Cables: Channel 1
Potential Cables: Channel 2
Potential Cables: Channel 3
(WR50-13 only)
USB Memory Stick
Instruction Manual
If any of the above items are missing or damaged, contact your local representative or Raytech USA
immediately. Optional test leads may be ordered (other than shown).

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WR14
Instrument
Cable Bag
Current Cables
Jumper Cable(s)
Power Cord
5 Printer Refill Rolls
Potential Cables: Channel 1
Potential Cables: Channel 2
USB Memory Stick
Instruction Manual
If any of the above items are missing or damaged, contact your local representative or Raytech USA
immediately. Optional test leads may be ordered (other than shown).

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INTRODUCTION
GENERAL
Raytech Digital Winding Resistance meters are an enhanced version winding resistance system with
the most advanced demagnetizing circuit. They are designed for a 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, multi-
microprocessor based architecture. These systems are designed for highly accurate readings on-site
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 WR50 series is
capable of precision measurements up to 50A (WR14: 15A).
Operation: The WR series of instruments apply a present current level, selected by the user, from
0.025A to 100A. The 50V
1
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 WR50 and the WR14 series of instruments are available in their own rugged
waterproof field cases.
NOTE!
The WR field case is a waterproof design. A pressure regulator activates
when the case is opened to compensate for atmospheric pressure changes.
The WR series (including the WR100) is also available for 19” rack-mount installation.
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 of the transformer
under test. The WR series of instruments have extensive protection built in to the circuitry. This is one of
the many reasons we can extend our warranty to 5 years.
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.
1
WR14: 30V

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ADVANTAGES & FEATURE S
Highest Accuracy and Precision of any high current test system
Automatic measurements of Low Resistance from 0.00 ...100k
Demagnetizing Circuit (Advanced design)
Microprocessor based system with internal storage for over 10,000 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
Temperature channels with automatic resistance correction
Standard USB 2.0 & RS 232 (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
Mounted in rugged case for field testing
Fastest discharge time in the market
5 Year standard warranty
SYSTEM DETAILS
SYSTEM CHECK
The instruments are line operated
2
. The systems are designed to be used with AC Voltage power
sources between 90 to 264VAC 47…63Hz. 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.
2
The WR14 is battery operated in addition to mains power.

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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 potential cables with smaller gauge cables (Channel 1, 2, or 3)
than the original Raytech cables supplied!
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:
where
R= Resistance
U = Voltage
I = Current

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QUICK START GUIDE
INSTRUMENT OPERATION – PROFILES DEACTIVATED
3
1. Power on the instrument. Press Setup.
2. Select the Test Current, press Range or
Setup/Range. Press OK.
3. Press the Start button.
4. The results will be displayed. Press Stop.
5. The Safe indicator will show green.
WARNING!
Wait until the green light shows “Safe” before
handling the cables.
For examples of transformer connections, see
the next pages.
3
The checkbox for “Use Profiles” is not selected in the Setup under General.

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INSTRUMENT OPERATION – USING PROFILES
1. Power on the instrument. Press Setup.
2. On the General Tab, check “Use Profiles” and
touch “OK.”
3. Touch “Profile.”
4. Touch “New.”
5. Touch “New Transformer.”
6. Define new Transformer parameters by
selecting the symbols at the bottom of the
screen, then touch “Go.”

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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
handling the cables.
For examples of transformer connections, see
the next pages.

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SELECTION OF THE PROPER CURRENT R ANGE
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.
CONNECTION TO THE 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’ll reach saturation flux
in the core much faster. 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.

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SINGLE PHASE TRANSFORMER, VECTOR GROUP 0
Measurement of HV and LV Winding

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THREE PHASE TRANSFORMER, Δ – Δ VECTOR GROUP 0
Measurement of HV and LV Winding

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THREE PHASE TRANSFORMER Δ – Y, ONE LV WINDING
Measurement of one LV Winding

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THREE PHASE TRANSFORMER Δ – Y, TWO LV WINDING
Measurement of two LV Winding

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OPERATION ELEMENTS FOR FIELD UNITS
WR50
4
FRONT PANEL OVERVIEW:
WR50 CONTROL ELEMENTS AND CONNECTIONS
FUSE, MAINS INPUT AND SWITCH
A 16A fuse (slow blow) protects the device. Use only the correct fuse type to replace it.
EMERGENCY STOP
Press to Stop. The measurement will stop and immediately begin to discharge the transformer. Turn
clockwise to release. The device will remain in a safe mode state.
THERMAL PRINTER
Allows the user to quickly get results on paper by using the built-in thermal printer. The printer uses
thermal heat transfer technology. Therefore, there are no ink cartridges required or printer heads.
Special thermal paper is required for the printer to operate properly.
4
This illustrates a WR50-12 (2 channel instrument), the WR50-13 has a 3rd channel.
1: Fuse, Mains Input
and Switch
9: Ground Terminal
2: Emergency Stop
6: Potential
Receptacles
7: Current
Receptacle
10: Temperature
Receptacles 1 -3
8: External 11: Interface
(USB and RS 232)
3: Thermal Printer
4: Safety Indicators
5: Display with
Touch Panel