The transformer DC resistance is a required test item for the factory test, installation and handover test of semi-finished products and finished products in transformer manufacturing, as well as the preventive test of power department. It can effectively find the manufacturing defects such as material selection, welding, loose connection parts, missing stocks and broken wires of transformer coils and the hidden trouble after operation.
In order to meet the need of rapid measurement of transformer DC resistance, our company developed a transformer dc resistance tester with its own technical advantages.The instrument is a new generation of rapid tester which integrates single phase test and three phase test (Yn, Y, △) functions, and is an ideal equipment for measuring DC resistance of large power transformers.The screen adopts large screen and high resolution liquid crystal display screen, which is convenient to use on site. It has the function of Chinese menu prompt, simple and intuitive operation, and all the direct resistance test items are completed in one connection, with fast test speed, high accuracy and wide range.
1. For the winding test with star connection and neutral point lead, the instrument can adopt the method of three-phase simultaneous measurement to test the resistance of A0, B0 and C0 phases, which can save the test time.Moreover, the A0 phase data is tested first, and the same phase data is tested again and again at the same time, which solves the problem that the resistance of the neutral point outlet line cannot be tested when the three phases are tested at the same time, and makes the test data closer to the test value of the single phase..
2.For Y and △ winding test, the instrument can carry out three - phase automatic test, and calculate the three - phase unbalanced rate.
3.The functions of magnetic method and degaussing, which can meet various requirements of field test.
4.Variety of protection functions, such as anti-electromotive force protection, wire breaking protection and power failure protection..
5.Wide measuring range, up to 200 Ω, high precision.