■ Product Overview
Earth network grounding resistance tester is a special instrument for measuring the grounding conductance between earth network grounding resistance and ground point. The instrument adopts frequency conversion anti-interference technology, does not need high current measurement, can measure 50Hz accurate data in the substation strong interference environment, the measurement results are displayed by the large LCD screen, the instrument's own micro printer can print output. The instrument can measure grounding impedance and grounding resistance at the same time, which can truly reflect the actual characteristics of the ground network.
■ Functional features
▲ Measurement range: 0 ~ 5000 Ω (including current pile impedance)
▲ Resolution: 0.001m Ω
▲ Measurement error: ± (reading × 2% +0.005 Ω)
▲ Anti-power frequency 50Hz voltage interference capacity: 10V
▲ Test current waveform: sine wave
▲ Test current frequency: single frequency: 40-70Hz resolution 0.01Hz optional Settings
▲ Dual-frequency: 50±0.25Hz to 50±5.0Hz step 0.25Hz
60±0.25Hz to 60±5.0Hz step 0.25Hz
▲ Maximum output current: 5A
▲ Maximum output voltage: 400V
▲ Measurement line requirements: current line copper core cross-sectional area ≥1.5mm 2
▲ Cross-sectional area of copper core of electric pressure line ≥1.0mm2
▲ Power supply: AC220V± 10%, 50Hz
▲ Dimensions: 440mm×350mm×210mm
▲ Instrument weight: 18kg
