The transformer on-load tap changer tester is a high-voltage test equipment according to the standard of the electric power industry of the People’s Republic of China. It is designed according to the general technical conditions DL/T846 and 8-2004. It can meet the requirements of the "Power Equipment Handover and Preventive Test Regulations". The action sequence of the on-load tap-changer, the measurement switching time and other requirements. It can realize accurate measurement of the on-load tap-changer's transition time, transition waveform, transition resistance, three-phase consistency and other parameters. It is an ideal equipment for testing on-load tap-changers. (The user is an on-load switch that adjusts the capacity, please inform in advance)

①. Test Y0 Y △ transformer, the resistance value is displayed directly without conversion;

②. Humanized data analysis, which can automatically find out the faults in the waveform and mark them;

③. The display of the waveform is to automatically adjust the resistance value and the amplitude of the time according to the sampled data;

④. △-type transformers can show three phases;

⑤. It can be tested with or without winding;

⑥. The four-terminal wiring method provides high-precision resistance measurement without wire compensation;

⑦. Continuous testing can be performed in the middle of the test, saving the time of transformer power outage;

⑧ The instrument can survive word reports, which is convenient for data management and query;

⑨. The instrument is controlled by a small computer, with an external 800×480 color LCD touch screen, a high-speed printer, and an external mouse, which is easy to operate;

⑩. 1000 sets of data can be automatically saved inside the instrument, or it can be saved with an external USB flash drive.

①. Three-phase constant current source charging, charging current: 3A/1A gear; 0.6A/0.2A gear

②. Port voltage: 24V

③. Transition resistance range: 100Ω

④. Transition resistance measurement range: 1A range: 0.4Ω～20Ω 0.2A range: 10Ω～100Ω

⑤. Waveform recording time length: 300ms

⑥. Sampling rate: 30k

⑦. Time resolution: 0.1ms

⑧. Resistance resolution: 0.1Ω

⑨. Accuracy: Transition resistance: ±5% of reading ±0.1Ω Transition time: ±0.5% of reading ±0.2mS

⑩. Operating temperature: -10～40℃ Relative humidity: <85%RH