09,22,2026 16 views
Transformer on load switch testerIt is a comprehensive measuring instrument used to measure and analyze the electrical performance indicators of power transformers and special transformer on load tap changers in power systems based on the principles of the "Regulations for Handover and Preventive Testing of Power Equipment" and relevant regulations. It adopts computer control and can measure parameters such as transition time, transition waveform, transition resistance, three-phase synchronicity, etc. of on load tap changers through specially designed measurement circuits. The new testing principle utilizes microcomputer technology to test the performance of various on load tap changers of power transformers on the production site without disassembling and lifting switches, displaying and printing excessive waveforms and parameters. And according to the needs and on-site conditions, the measurement can be directly carried out by the tap changer lead, or by directly connecting the transformer three-phase bushing and neutral point for measurement.
Precautions for operation:
1. The instrument can be used with a coil for measurement, but live measurement is strictly prohibited, and the connection at the testing end should be disconnected;
When testing with windings, the non test end of the transformer should be grounded in a three-phase short circuit, and the O end of the instrument should not be grounded;
3. For load switches that have not been operated for a long time, the switch should be switched multiple times before testing to remove the oxide layer on the contact surface and impurities between the contacts;
Before use, the grounding terminal of the instrument must be properly grounded;
5. Two or more sets of wires cannot be connected together as one measurement, and unused wires must be open circuited;
During the testing process, it is not allowed to dismantle the testing line;
After the test is completed, turn off the instrument first and then remove all wiring.
