I.Description

The on-load tap-changer is the only moving part connected to the transformer circuit. Therefore, the detection of the on-load tap-changer is becoming more and more important. In the "power equipment transfer and preventive test procedures", asked to check the on-load tap-changer action sequence, measurement switching time. The instrument is mainly used to measure the transformer on-load tap-changer transition waveform, transition time, the instantaneous transition resistance, three-phase synchronization and so on.

The instrument is highly intelligent, all Chinese menu prompts, simple operation. Instrument small size, light weight, anti-interference ability, greatly reducing the labor intensity of the site staff, is the power supply units, transformer manufacturing industry to ensure safe production, improve product quality ideal instrument.

II.Features

l Large output current, light weight；

l Test YO, Y, △ type transformer, the resistance unnecessary to be converted but directly display；

l With winding or without winding measurement；

l Waveform display automatically adjusts the resistance according to the sampled value, the time value amplitude

l With perfect protection circuit, reliability and strong；

l 7-inch large LCD display, easy on-site operation；

l Built-in high-capacity lithium battery(optional)

l 500 sets of data can be saved in Internal automatically, can connect with U Disk.

III.Technical Parameters

Output current: 2.0A、1.0A、0.5A、0.2A

Measuring range Transition resistance: 0.5Ω～5Ω(2.0A)    2Ω～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 ± 0.1Ω)

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

Sampling rate of 20kHz

Storage mode U disk storage

Dimensions: 340mm × 245mm × 210mm

Instrument weight: 7kg

IV.Application Conditions

Ambient temperature   -10 ℃ ~ 50 ℃

Ambient humidity      ≤ 85% RH

Power supply  AC220V±10%

Power frequency    50 ± 1Hz