■ Product Overview

The different frequency earth grid grounding resistance tester is a special instrument for measuring the grounding continuity between the grounding resistance of the earth grid and the grounding point. The instrument adopts frequency conversion anti-interference technology and does not need large current measurement. It can measure accurate data of 50Hz in the strong interference environment of the substation. The measurement results are displayed by large screen LCD, and the instrument is equipped with a micro printer, which can be printed out. The instrument can measure the grounding impedance and grounding resistance at the same time, which can more truly reflect the actual characteristics of the grounding grid.

■ functional features

▲ measurement range: 0 ~ 5000 Ω (including current pile impedance)

▲ resolution: 0.001M Ω

▲ measurement error: ± (reading) × 2％+0.005Ω）

▲ anti power frequency 50Hz voltage interference capability: 10V

▲ test current waveform: sine wave

▲ test current frequency: single frequency: 40-70HZ, resolution 0.01Hz, set at will

▲ dual frequency: 50 ± 0.25hz to 50 ± 5.0hz in steps of 0.25hz

60 ± 0.25hz to 60 ± 5.0hz in steps of 0.25hz

▲ large output current: 5A

▲ large output voltage: 400V

▲ requirements for measuring wire: cross sectional area of copper core of current wire ≥ 1.5mm 2

▲ sectional area of copper core of voltage line ≥ 1.0mm2

▲ power supply: AC220V ± 10%, 50Hz

▲ overall dimension: 440mm × 350mm × 210mm

▲ instrument weight: 18kg