After the transformer is handed over, overhauled and the tap changer is changed, the DC resistance test must be carried out. By testing the DC resistance of the transformer winding, the power workers can further understand the welding and connection quality of the transformer leads, whether there is a turn to turn short circuit or open circuit in the winding, and the contact quality of the tap changer. The detection of DC resistance can not be separated from DC resistance tester, because DC resistance tester is a high-precision instrument which can completely replace the traditional DC resistance testing product for the traditional DC single arm bridge products. Therefore, DC resistance tester is worth choosing!
The value of DC resistance tester is reflected in its advantages of fast test speed, high test accuracy, wide measurement range, complete functions and dual-use of AC and DC, simple operation and good measurement reliability.
The test speed of DC resistance tester is fast. Now the output current of the instrument makes it possible that the current inertia of the equipment with large inductance can be compensated in time during the measurement process. At the same time, the saturation speed of the iron core is faster. In this way, the charging time is shorter, and the test speed is greatly improved, hundreds of times faster than the traditional instrument.
The high accuracy of DC resistance tester is reflected in the internal structure and core testing technology of the instrument. The instrument adopts advanced four terminal measurement method, constant current power supply technology and imported high-quality components, so that the charging current value and anti inductance ability of the instrument are kept in a relatively stable state during the testing process, and the anti-interference ability of the instrument is very good, because of this Some features ensure that the accuracy of the instrument is at a relatively high level.
In addition to the above most important advantages, the DC resistance tester has the following features: easy to carry, easy to operate, large screen display, perfect protection circuit, good reliability in test, automatic adjustment of test current according to different resistance of transformer winding, and very convenient in use.
Through the above analysis of the advantages of DC resistance tester, we fully show that DC resistance tester is worth choosing!
