TR4
Turns Ratio Meter 3-Phase
Description
The Raytech TR4 is the next-generation successor to the TR-Mark III transformer tester.
It provides advanced diagnosing technique including FRSL (Frequency Response of Stray Losses) and SCimp (Short Circuit Impedance), fully integrated into one portable instrument.
The TR4 supports testing of phaseshifting transformers. A one-time test setup is enabled by an internal multiplexer.
All measurements are performed using an internally generated user adjustable test voltage of up to 250 VAC. The instrument can be powered from the mains or from an external power bank.
Integrated tap control enables automated test sequences, making it suited for field and laboratory transformer diagnostics.
Features
Measurement Methods
- Power transformers, Tap changers, PT’s and CT’s measurement
- Turns Ratio, Excitation Current and Phase Displacement Measurements
- Transformer Winding Connection and Vector Group Detection
- Magnetic Balance Measurement
- FRSL (Frequency Response of Stray Losses) (Optional)
- Short Circuit Impedance/ Leakage Reactance (Optional)
Additional Features
- Automatic Multiplexer for Primary and Secondary Side
- Automatic selection of suitable AC test voltage
- Controlling Tap Changer Manually or Automatically With the Tap Control Interface
- Built-in Temperature Channel
User Interface and Data Management
- Color LCD With Backlighting and Capacitive Touch Screen
- User-friendly interface
- Operating the Instrument With a Touch Screen or by Using the Remote Control
- Test object Profile and Template creation, import and export
- Data exchange via USB-Key, serial cable and USB cable
- Report generation in various formats
Durability and Support
- The enhanced smart heavy-duty protection system
- Extremely Rugged
- 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
Power Bank:
USB-PD, 20V/60W
Absolute input voltages:
90-264 VAC @ 47-63Hz
Consumption power:
Max. 150VA
Output power:
Max. 100W
Test voltage user selectable (AC):
10-250 VAC
Max. test current (AC):
1A
Display:
7" TFT Color LCD
Input devices:
Capacitive touch screen, support mouse and keyboard
Interfaces:
x2 USB-A, 1x USB-C, Ethernet
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):
8.96 kg (19.75 lbs.)
See Instruction Manual for more Parameters
Specifications are subject to change without notice
Accuracy
Ratio Measurement Parameters
Turns Ratio at 250VAC @ 55Hz
Range
Accuracy
Resolution
0.8 ... 200
±0.04% Rdg ± 1 LSD
5 Digits
200 ... 5000
±0.10% Rdg ± 1 LSD
5 Digits
5000 … 50000
±0.40% Rdg ± 1 LSD
5 Digits
Turns Ratio at 100VAC @ 55Hz
Range
Accuracy
Resolution
0.8 ... 200
±0.04% Rdg ± 1 LSD
5 Digits
200 ... 2000
±0.10% Rdg ± 1 LSD
5 Digits
2000 … 20000
±0.40% Rdg ± 1 LSD
5 Digits
Turns Ratio at 40VAC @ 55Hz
Range
Accuracy
Resolution
0.8 ... 200
±0.04% Rdg ± 1 LSD
5 Digits
200 ... 2000
±0.06% Rdg ± 1 LSD
5 Digits
2000 … 20000
±0.40% Rdg ± 1 LSD
5 Digits
Turns Ratio at 10VAC @ 55Hz
Range
Accuracy
Resolution
0.8 ... 200
±0.06% Rdg ± 1 LSD
5 Digits
200 ... 5000
±0.10% Rdg ± 1 LSD
5 Digits
Current
Accuracy
Resolution
0 ... 1A
±1.00% Rdg ± 0.01A
4 Digits
Phase Angle
Accuracy
Resolution
±90° @ 55Hz
±0.05° ± 1 LSD
4 Digits or 0.01°
Output Voltage
Accuracy
Resolution
0 – 250VAC
±1% ± 1 LSD
4 Digits or 0.1VAC
Temperature
Accuracy
Resolution
0 – 70°C
±0.2°C ± 1 LSD
0.1°C
Flyer TR4
Flyer
1.00
16.03.2026
Short overview about the TR4.
