For the power system, transformers are the core equipment in the system, so the long-term and reliable operation of transformers is related to the stability and reliability of the entire system.

The DC resistance test of transformer windings is a test item for transformers after handover, major repairs, and changes to tap changers; At the same time, the on load tap changer is a moving component connected to the transformer circuit, so the detection of on load tap changers is becoming increasingly important. In the "Regulations for Handover and Preventive Testing of Power Equipment", it is required to check the sequence of action of on load tap changers, measure switching time, etc.

The traditional testing method for the two experimental projects is split type testing, which requires equipping a direct resistance tester and an on load tap changer tester. Because they are two independent instruments, each equipped with a testing line, it requires separate wiring and testing, which greatly reduces work efficiency.

Our company has innovatively developed a comprehensive tester for transformer DC resistance and on load tap changer. We only need one set of equipment, which can complete the testing of two projects without the need for frequent disconnection of test lines, greatly improving work efficiency and saving user costs.

1. One wiring can complete two test items: direct resistance test and load test.

2. The direct resistance testing function can be used to test Yn, Y, and △ windings using three-phase measurement method, and calculate the three-phase unbalance rate; The test power supply has an output voltage of 28V and an output current of 20A, meeting the testing requirements of the vast majority of transformers; The design of high-voltage and large capacity main transformers facilitates magnetic testing function, greatly accelerating the speed of direct resistance testing.

3. During on load testing, there is no need for manual short circuiting on the low voltage side, and the instrument is automatically controlled; The output current can reach 2A, suitable for measuring smaller transition resistances.

4. The automatic protection function for power supply 380V misconnection and the alarm function for grounding wire unconnected ensure your use.

5. Industrial grade 10.1-inch large screen display, fresh and simple display style design, full touch combined with one click shuttle operation, creating a comfortable and convenient human-machine interaction experience for you.