VTSYIQI 20A Transformer DC Resistance Tester Transformer DC Resistance Meter with Measuring Range 0.001 Ω to 20KΩ Resolution 0.1 μΩ Accuracy 0.2% for Achieve Rapid Measurement of Transformer Direct Resistance

Overview

The DC resistance of transformers is a necessary measurement item for semi-finished and finished products in transformer manufacturing, factory testing, installation, major repairs, changes to tap changers, handover testing, and preventive testing by power departments. It is possible to check the welding quality of the winding joints and whether there is a turn to turn short circuit in the winding. It can also detect whether the various positions of the voltage tap changer are in good contact, whether the actual position of the tap changer matches the indicated position, whether the lead wire is broken, and whether there are broken wires when multiple wires are wound together. This instrument adopts a new power technology, which has the characteristics of small size, light weight, large output current, good repeatability, strong anti-interference ability, and complete protection function. The whole machine is controlled by a high-speed microcontroller, with a high degree of automation and automatic discharge and discharge alarm functions. The instrument has high testing accuracy, easy operation, and can achieve rapid measurement of transformer direct resistance.

Functional Features

1. This tester has 6 output currents (maximum 20A; minimum<10mA), suitable for measuring the DC resistance of various transformers.

2. The measuring range of this tester is 0.001 Ω to 20K Ω.

3. The whole machine adopts high-speed ARM control, with high degree of automation and easy operation.

4. The instrument adopts programmable switch power supply technology, with a wide measurement range.

5. The protection function is complete, which can reliably protect the impact of back electromotive force on the instrument, and the performance is more reliable.

6. Fast response speed, stable instrument measurement data, and automatic data refresh during the testing process.

7. Intelligent power management technology ensures that the instrument always operates at its minimum power state, effectively reducing internal heat generation and saving energy.

8. The instrument is equipped with an uninterruptible clock inside.

9. The instrument is equipped with an uninterruptible power storage device that can permanently store data.

Technical Indicators

1. Output current: 20A, 10A, 5A, 1A, 200mA, 100mA, ≤ 10mA

2. Resolution: 0.1 μ Ω

3. Range: 1.0-20K Ω (≤ 10mA range)

0.1-200 Ω (100mA range)

0.05-100 Ω (200mA range)

10m Ω -20 Ω (1A gear)

5.0m Ω -10 Ω (5A gear)

1.0m Ω -2 Ω (10A gear)

0.5m Ω -1 Ω (20A range)

4. Accuracy: 0.2%

5. Working temperature: 0-40 ℃

6. Working humidity:<90% RH, no condensation

7. Host size: 330mm in length, 260mm in width, and 170mm in height

8. Host weight: 5.0kg

Instrument completeness