WR50-12
Winding Resistance Meter 50Amps, 2 Channels
Description
The Raytech WR50-12 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.
The powerful output together with smart features enable WR50-12 to charge and discharge the winding quickly. It includes also special tools such as advanced transformer core demagnetizing, temperature rise measurement and analysis (optional), and automatic temperature correction using up to 3 temperature probes.
The WR50-12 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
- Adjustable output current between 25mA and 50A
- Very fast charge and discharge of high inductive loads up to 1500 Henry
- Two measuring channels which enable measuring low voltage and high voltage side simultaneously
- Complete automatic calibration system and system diagnostics
- 3 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
- 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
- Easy storage and printing of test results while the test system is measuring
Durability and Support
- The enhanced smart heavy-duty protection system
- Smart cooling system to dissipate the internal heat
- 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
Absolute input voltages:
90-264 VAC @ 47-63Hz
Consumption power:
Max. 1500VA
Output power:
Max. 1200W
Test current user selectable:
25mA-50 A
Max test voltage (DC):
50VDC
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 serial2 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: 525 mm (20.7”) W: 437 mm (17.2”) H: 213 mm (8.4”)
Weight (instrument):
16.6 kg (36.6 lbs.)
See Instruction Manual for more Parameters
Specifications are subject to change without notice
Accuracy
Measurement parameters
Current range
Measuring range
Accuracy
Resolution
30-50 A
0.00 µΩ ... 1.3 Ω
± 0.1% Rdg ± 0.05 µΩ
5 Digits or 0.05 µΩ
15-30 A
0.0 µΩ ... 3.3 Ω
± 0.1% Rdg ± 0.1 µΩ
5 Digits or 0.1 µΩ
8-15 A
0.0000 mΩ ... 6.3 Ω
± 0.1% Rdg ± 0.2 µΩ
5 Digits or 0.2 µΩ
3-8 A
0.0000 mΩ ... 16.7 Ω
± 0.1% Rdg ± 0.5 µΩ
5 Digits or 0.5 µΩ
1-3 A
0.000 mΩ ... 47.2 Ω
± 0.1% Rdg ± 1 µΩ
5 Digits or 1 µΩ
0.7-1 A
0.000 mΩ ... 71.4 Ω
± 0.1% Rdg ± 2 µΩ
5 Digits or 2 µΩ
0.3-0.7 A
0.000 mΩ ... 167 Ω
± 0.1% Rdg ± 5 µΩ
5 Digits or 5 µΩ
0.1-0.3 A
0.00 mΩ ... 500 Ω
± 0.1% Rdg ± 10 µΩ
5 Digits or 20 µΩ
25-100 mA
0.00 mΩ ... 2 kΩ
± 0.1% Rdg ± 20 µΩ
5 Digits or 10 µΩ
<25 mA
2 kΩ ... 10 kΩ
± 0.2% Rdg ± 200 mΩ
5 Digits or 200 mΩ
<25 mA
10 kΩ ... 100 kΩ
± 0.8% Rdg ± 20 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
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.
Flyer WR-50
Flyer
4.00
22.01.2025
Short Overview about WR50-1x, WR50-1xR
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
