Method of grounding resistance measuring instrument

◆ Simple operation. The test current waveform is sine wave, and the difference between frequency and power frequency is only 5Hz. Two frequencies of 45Hz and 55Hz are used for measurement.

◆ Wiring labor is small, without large current line. Full Chinese menu control, directly display the measurement results.

Edwr-iii type large scale grounding resistance tester technical specifications

◆ Impedance measurement range: 0 ~ 200 ω

◆ Resolution: 0.001 ω

◆ Measurement error: ±(reading ×2%+0.01 ω)

◆ Anti-power frequency 50Hz voltage interference ability: 30V

Test current waveform: sine wave

◆ Test current frequency: 45Hz, 55Hz dual frequency

◆ Maximum output current: 3A

◆ Maximum output voltage: 100V

◆ Measurement line requirements: Copper core cross-sectional area of current wire ≥1.0mm2; Copper core cross-sectional area of voltage wire ≥0.2mm2

◆ Power supply: AC220V±10%, 50Hz

◆ Use environment: temperature: -10℃ ~ 40℃;

Relative humidity: < 90%

◆ Size: 440×350×210

◆ Instrument weight: 8.0kg

. It can be used to measure large ground grids with very small grounding impedance. All characteristic parameters of the grounding device defined by the relevant scale can be measured.

◆ High precision.

This instrument is small in size, light in weight, easy to carry. Not only can measure the grounding impedance, but also can measure the resistance component and reactance component.

Can measure the field interference, convenient for users to estimate the measurement error.

◆ The power frequency equivalence of measuring is good.

◆ Can retain 50 groups of measurement data, and its own micro printer can print measurement results on site.

This instrument adopts the method of different frequency measurement, with modern software and hardware filtering technology, so that the instrument has a high anti-interference function, the test data is not chaotic and reliable.

◆ Strong function.

◆ Strong anti-interference ability.

30V power frequency interference only brings 0.01 ω error.