Description
The Raytech WR14 is a Winding Resistance meter system specially designed for high precision DC winding resistance measurement of high inductive windings such as large power transformer windings. It can also be used for precisely diagnosing and for preventive maintenance. Many power transformer’s faults such as shorted turns, tap changer problems and loose connections can be detected precisely.
For maximum mobility, the WR14 is battery operated and very lightweight. It includes also special tools such as advanced transformer core demagnetizing, temperature rise measurement and analysis (optional), and automatic temperature correction using up to 2 temperature probes.
The WR14 can inject current to both high voltage and low voltage side using the jumper cable provided, and resistance measurement can be performed simultaneously using two separate measurement channels.
Features
Measurement Methods
- Large DC winding resistance measurements range from very low values 0.00µΩ up to 100kΩ
- Advanced transformer core demagnetization
- Fully automatic cooling curve analysis (option AHRT 01)
Additional Features
- Lightweight and battery-operated
- Adjustable output current between 25mA and 15A
- Fast charge and discharge of high inductive loads up to 1500 Henry
- Two measuring channels which enable measuring low voltage and high voltage sides simultaneously
- Complete automatic calibration system and system diagnostics
- 2 temperature channels for automatic temperature correction of measured resistance
- Pure filtered DC Power source for the highest accuracy readings
User Interface and Data Management
- User-friendly user interface
- Easy storage and printing of test results while the test system is measuring
- Test object Profile creation, import and export
- Plot the measurement results as a function of tap or time on display
- Data exchange via USB-Key, serial cable and USB cable
- Report generation in various formats
- Full remote-control option from T-Base Pro PC software, or custom code by using Command Set
Durability and Support
- The enhanced smart heavy-duty protection system
- Software and firmware update
- Raytech technical support
- 2 years standard warranty
Specifications
Area of use:
Portable to use indoor and outdoor including heavy industrial electromagnetic environments
Enclosure:
Industrial high-impact plastic case
Supply:
IEC 60320, C13/C14 mains connector, CAT II
Battery:
Lithium-Ion battery, 14.8V/ 6Ah
Absolute input voltages:
90-264 VAC @ 47-63Hz
Consumption power:
Max. 150VA
Output power:
Max. 90W
Test current user selectable:
25mA-15ADC
Max. test voltage:
30VDC
Display:
5.7" TFT Color LCD
Input devices:
Touch screen, support mouse and keyboard
Interfaces:
2 USB 2.0 full speed (1 host, 1 device) and 9 Pin RS232 serial
Internal memory storage:
10000 test results
Printer:
Internal 1.9" thermal printer, support external printer direct connection
Operating temperature:
-10°C (14°F) to +55° C (131°F)
Storage temperature:
-20°C ( -4°F) to +70°C (158°F)
Degree of protection (closed door):
IP67, dust-tight and water immersion up to a 1-meter depth
Size:
L: 470 mm (18.5”) W: 357 mm (14.1”) H: 176 mm (6.9”)
Weight (instrument):
9.4 kg (20.6 lbs.)
See Instruction Manual for more Parameters
Specifications are subject to change without notice
Accuracy
Measurement parameters
Current range
Measuring range
Accuracy
Resolution
10-15 A
0.00 µΩ ... 1 Ω
± 0.1% Rdg ± 0.1 µΩ
5 Digits or 0.05 µΩ
5-10 A
0.0 µΩ ... 3 Ω
± 0.1% Rdg ± 0.2 µΩ
5 Digits or 0.1 µΩ
1-5 A
0.0000mΩ ... 15 Ω
± 0.1% Rdg ± 0.5 µΩ
5 Digits or 0.5 µΩ
0.5-1 A
0.000 mΩ ... 30 Ω
± 0.1% Rdg ± 2 µΩ
5 Digits or 1 µΩ
0.1-0.5 A
0.000 mΩ ... 300 Ω
± 0.1% Rdg ± 5 µΩ
5 Digits or 2 µΩ
25-100 mA
0.00 mΩ ... 1200 Ω
± 0.1% Rdg ± 20 µΩ
5 Digits or 10 µΩ
<25 mA
1.2 kΩ ... 10 kΩ
± 0.1% Rdg ± 100 mΩ
5 Digits or 200 mΩ
<25 mA
10 kΩ ... 100 kΩ
± 0.5% Rdg ± 10 Ω
4 Digits or 20 Ω
Resistance range
0.00 µΩ to 100 kΩ
Firmware WR
Firmware
3.7.4.0
01.05.2025
This Firmware is valid for the following products:
WR14, WR14 R, WR50-1x, WR50-1xR, WR100-12R, WR100-13R
The Firmware has integrated Transformer profiles, which can be very helpful. If you don't want to use them, go into the Setup on the instrument and deselect "Use Profiles" or download the old firmware version 2.7.12.0.
recommended
Flyer WR-14
Flyer
4.00
22.01.2025
Short overview about the WR-14 and WR-14 R
Command Set WR-xx
Command Set
3.02
26.04.2020
This is a summary of the commands to remote control the WR14, WR14R, WR50-1x, WR50-1xR, WR100-12R, WR100-13R over the RS232 or USB interface.
Instruction Manual WR-XX- Field
Instruction Manual
3.03
18.04.2023
Instruction Manual for the Winding Resistance Meters in the field case for the following types:
WR14, WR50-12, WR50-13
Leaflet Temperature Probe TP 01
Leaflet
1.00
27.04.2020
This is a short description about the Temperature Probe TP 01 with technical specification.
Quick Start Guide SDK WRxx
Command Set
1.00
27.04.2020
This is Quick Start Guide about the Software Development Kit for all Winding Resistance Meter from Raytech.
Firmware WR (Old version)
Firmware
2.7.12.0
08.12.2020
This Firmware is valid for the following products:
WR14, WR14 R, WR50-1x, WR50-1xR, WR100-12R, WR100-13R
This firmware is suitable for the older instrument (with the CPU model: NetDCU), for serial numbers less than 350-000. These instruments can work with newer firmware but it is slow and we recommend to use this firmware version instead.
recommended