The BOWR-5A large-scale grounding resistance tester can measure the grounding resistance of substations (4 Ω), hydro thermal power plants, microwave stations (10 Ω), and lightning rods (10 Ω). It adopts a new type of variable frequency AC power supply and measures such as microcomputer processing control and signal processing, which effectively solves the anti-interference problem in the testing process, simplifies the testing operation process, improves the accuracy and precision of the testing results, and greatly reduces the labor intensity and testing cost of the testing personnel

The BOWR-5A large-scale grounding resistance tester is suitable for testing the power frequency grounding impedance, contact voltage, step voltage, and other power frequency characteristic parameters of various grounding devices, as well as soil resistivity This instrument adopts cross frequency anti-interference technology, which can accurately measure data at the power frequency of 50Hz in strong interference environments The maximum test current is 5A, which will not cause the potential of the grounding device to be too high during testing. At the same time, it also has strong anti-interference ability, so it can be measured without power outage

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1. The measured power frequency equivalence is good The test current waveform is a sine wave, with a frequency difference of only 5Hz from the power frequency. Two frequencies, 45Hz and 55Hz, are used for measurement

2. Strong anti-interference ability This instrument adopts the frequency difference method for measurement, combined with modern software and hardware filtering technology, making the instrument have high anti-interference performance and stable and reliable test data

3. High precision The basic error is only 0.005 Ω, which can be used to measure large grounding grids with very low grounding impedance

4. Powerful functionality Can measure current pile, voltage pile, grounding resistance, step voltage, and contact voltage

5. Easy to operate Fully Chinese menu style operation, directly displaying measurement results

6. Wiring requires less labor and does not require high current wires

1. Impedance measurement range: 0~150 Ω

2. Resolution: 0.001 Ω

3. Measurement error: ± (reading x 2%+0.005 Ω)

4. Anti power frequency 50Hz voltage interference capability: 10V

5. Test current waveform: sine wave

6. Test current frequency: 45Hz, 55Hz dual frequency

7. Maximum output current: 5A

8. Maximum output voltage: 420V

9. Measurement line requirement: The cross-sectional area of the copper core of the current wire should be ≥ 1.5mm2

Voltage wire copper core cross-sectional area ≥ 1.0mm2

10. Power supply: AC220V ± 10%, 50Hz

11. Dimensions: 440 × 350 × 210

12. Instrument weight: 38kg