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. This instrument is mainly used to measure the transition waveform, transition time, instantaneous transition resistance values, three-phase synchronicity, etc. of on load tap changers in transformers.

The instrument has a high degree of intelligence, with all Chinese menu prompts and simple operation. The instrument has a small size, light weight, and strong anti-interference ability, greatly reducing the labor intensity of on-site workers. It is an ideal instrument for power generation units and transformer manufacturing industries to ensure production and improve product quality.

▶ The instrument has a high output current and is lightweight;

▶ Test Yn, Y, and D type transformers, and display resistance values directly without conversion;

▶ Can be measured with or without windings;

▶ The waveform display automatically adjusts the resistance and time value amplitude based on the sampled value;

▶ Equipped with complete protection circuits and strong reliability;

▶ A 7-inch large LCD display for easy on-site operation;

▶ Equipped with a large capacity lithium battery, it can be connected without an external power source (optional);

▶ Internally, 500 sets of data can be automatically saved.

Output currents of 2.0A, 1.0A, 0.5A, 0.2A

Measurement range: Transition resistance: 0.3 Ω~5 Ω (2.0A)

1Ω～20Ω(1.0A)   

5Ω～40Ω(0.5A)    

20Ω～100Ω(0.2A)

Transition time: 0-320ms

Open circuit voltage 24V

Measurement accuracy transition resistance: ± (5% reading ± 0.1 Ω)

Transition time: ± (0.1% reading ± 0.2ms)

Sampling rate 20kHz

Storage method: Local storage

Dimensions: 360 * 290 * 170 (mm)

Wire box: 360 * 290 * 170 (mm)

Instrument weight host 6KG wire box 4.5KG

The standard length of the test line is 13 meters, which can be customized