A200 transformer DC resistance is a project in transformer manufacturing that includes semi-finished and finished product factory testing, installation, major repairs, changes to tap changers, handover testing, and preventive testing by the power department. 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.

In order to meet the needs of rapid measurement of transformer DC resistance, our company's A200 DC resistance tester adopts new power supply 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.

1. The whole machine is controlled by a high-speed microcontroller, with a high degree of automation and easy operation.

2. The instrument adopts new power technology, with multiple current levels and a wide measurement range, suitable for measuring the DC resistance of large and medium-sized transformers.

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

4. It has an audible discharge alarm, clear discharge indication, and reduces misoperation.

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

6. Seven inch high brightness touch color LCD, clear display under strong light, touch screen operation, free switching between Chinese and English.

7. The instrument comes with a perpetual calendar clock and power down storage, which can store 1000 sets of test data for real-time reference.

8. The instrument has Bluetooth communication, RS232 communication, and USB interface for computer communication and USB data storage.

9. Comes with a panel mounted micro printer.

project	Technical indicators and parameters	remarks
Test current	<20mA、2.5A、5A、10A、20A、50A
measuring range	40μΩ～400mΩ （50A） 100μΩ～1Ω  （20A）  500μΩ～2Ω  （10A） 1mΩ～4Ω    （5A）2mΩ～8Ω   (2.5A）	Accuracy: ± (0.2%+2 words)
	10Ω-20KΩ  （<20mA）	Accuracy: ± (0.5%+2 words)
Minimum Resolution	0.1μΩ
display	Liquid crystal display	The resistor displays 4 significant digits
data storage	1000 sets
work environment	Environmental temperature: 0 ℃~40 ℃ Relative humidity:<90% RH, no condensation
Power Supply	AC 220V±10V，50Hz±1 Hz	Insurance tube 10A
Maximum power consumption	1000W
External dimensions	Host: 405 × 230 × 355 (mm) Wire box: 360 × 260 × 180 (mm)
weight	Host 15.1KG cable box: 5.75KG
Test line length	Standard 13 meters	Length can be customized