Grounding resistor tester UHV-800

ground bondfor soilfor electrical equipment

The UHV-800 is a specialized instrument for measuring grounding resistance of large earth grids and grounding continuity between points. It uses different-frequency anti-interference measurement technology to obtain accurate data at mains frequency (50 Hz) even under strong interference.

Overview

• Designed for large grounding networks: measures grounding resistance and grounding continuity between points using sine-wave test currents at frequencies near the power frequency (45 Hz and 55 Hz).
• Measures current pile and voltage pile characteristics, step voltage and contact voltage relevant to safety and compliance checks.

Features

• Power-frequency equivalence: test current waveform is a sine wave offset by ±5 Hz from mains frequency (uses 45 Hz and 55 Hz) for realistic equivalence to power systems.
• Strong anti-interference capability: different-frequency method combined with software and hardware filtering ensures stable and reliable results in noisy environments.
• High precision: basic error down to 0.005 Ω, suitable for low-impedance grounding networks.
• Comprehensive measurement functions: current pile, voltage pile, grounding resistance, step voltage and contact voltage.
• Easy operation: menu-driven display that shows measurement results directly.
• Reduced wiring: no need for large-section current conductors in most measurements, lowering installation effort.

Nicknames

• Grounding grid resistance tester
• Grounding resistance meter

Specifications / Technical data

• Measurement range: 0–200 Ω (including current pile impedance)
• Resolution: 0.001 Ω
• Measurement error: ±(reading × 1% + 0.005 Ω)
• Maximum output voltage: AC 400 V (45 Hz, 55 Hz, dual-frequency, sine wave)
• Maximum output current: AC 5 A (45 Hz, 55 Hz, dual-frequency, sine wave)
• Output current steps: 5 / 4.5 / 4 / 3.5 / 3 / 2.5 / 2 / 1.5 / 1 A (0.5 A steps, 9 levels)
• Anti-interference capability: anti-power-frequency 50 Hz voltage 10 V
• Measurement line requirements: current wire copper core cross-section ≥ 1.5 mm²; voltage line copper core cross-section ≥ 1.0 mm²
• Power supply: AC 220 V ±10%, 50 Hz
• External dimensions: 295 × 340 × 310 mm
• Instrument weight: 30 kg