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20A Single-Phase Transformer DC Resistance Measuring Instrument
20A Single-Phase Transformer DC Resistance Measuring Instrument

20A Single-Phase Transformer DC Resistance Measuring Instrument

Applications:

Designed for power companies and industrial facilities to measure the DC resistance of transformers, instrument transformers, generators, and motors during manufacturing, installation, commissioning, and preventative maintenance. It is crucial for detecting winding defects such as poor welding, loose connections, broken strands, and broken wires. It enables technicians to perform fast, accurate measurements on large transformers and induction equipment, ensuring reliable operation and preventing failures.

  • Response within
    24 hours

  • Free warranty
    12 month

  • On-line training
    Support

Profile:

20A single-phase DC resistance tester features a wide resistance measurement range, multiple current selections, and automatic blind testing. Equipped with a 5.0-inch 65K color touchscreen, a built-in high-speed thermal printer, and non-volatile memory capable of storing 500 data sets, it provides comprehensive DC resistance testing. The instrument features complete back EMF protection, temperature conversion to standard values, and USB storage, offering professional diagnostic capabilities in a portable design.

Features:

1. Wide resistance measurement range, high resolution (0.1μΩ), and multiple current range selections;
2. Automatic testing (blind testing) function simplifies operation;
3. Comprehensive back EMF protection enhances safety. The temperature conversion function automatically converts resistance values ​​to standard temperatures;
4. It can complete longitudinal testing of DC resistance of on-load tap changers in a single operation;
5. It offers high measurement accuracy, is interference-resistant, shock-resistant, and portable;
6. It features a 5.0-inch 65K-color touchscreen for intuitive operation;
7. It has built-in high-capacity non-volatile memory, capable of storing 500 sets of data;
8. It includes a built-in high-speed mini thermal printer for on-site printing of test results;
9. It has a built-in high-precision clock for real-time time display;
10. It supports USB storage for convenient data export.

Parameter:

Test Current Measurement Range Accuracy
20A 100μΩ ~ 1.0Ω ±(0.2% reading + 0.5μΩ)
10A 1mΩ ~ 2.0Ω ±(0.2% reading + 1.0μΩ)
5A 2mΩ ~ 4.0Ω ±(0.2% reading + 2.0μΩ)
2A 10mΩ ~ 10Ω ±(0.2% reading + 0.01mΩ)
1A 20mΩ ~ 20Ω ±(0.2% reading + 0.02mΩ)
300mA 100mΩ ~ 66Ω ±(0.2% reading + 0.1mΩ)
100mA 200mΩ ~ 200Ω ±(0.2% reading + 0.2mΩ)
30mA 2.0Ω ~ 600Ω ±(0.2% reading + 2.0mΩ)
<1mA 600Ω ~ 50kΩ ±(0.5% reading + 1.0Ω)