Transformer DC Winding Resistance Tester It is a mandatory test item for semi-finished products and finished products in transformer manufacturing, installation, handover test and preventive test of the power sector, which can effectively find manufacturing defects and hidden dangers after operation such as material selection, welding, loose connection parts, lack of strands, and broken wires of transformer coils.

1.Output current：0-10A, range: 1mW-20KW。

Current	Range	Current	Range
10A	1mW-600mW	0.5A	2W-12W
5A	10mW-1.2W	0.2A	5W-30W
2A	20mW-3W	20mA	25W-300W

 
Remark: Please choose automatic test function if beyond above range.

1. Accuracy:  0.2%   max. resolution： 0.1mW。
2. With large LCD screen display and English menu, easy to operate .
3. With large storage capacity , can store 2000 testing records .
4. Power supply: built-in battery
5. Working temperature：﹣10℃～50℃　　
6. Working environment：Humidity ＜90%RH             　  
7. Weight:2㎏

This transformer DC resistance tester USES 32-bit ARM as the core of the processing control , with automatic completion of self-calibration, steady flow judgment, data processing, resistance value display and other functions, can measure the dc resistance of various types of transformers and CT/P. The instrument can work directly with internal batteries, which greatly facilitates the use of field workers.

Dc resistance measurement of winding is one of the routine tests for transformers. The main purpose is to check whether the connection between winding and lead wire is good or not, and whether the resistance between each phase winding is balanced, etc., in order to ensure the safe operation of transformers.