Lightning arrestor tester UHV-540

portablewith internal data basewith memory

UHV-540 is a portable tester for measuring and analysing leakage currents of zinc oxide (metal oxide) arresters to assess ZnO ageing and moisture by resistive, capacitive and total leakage current measurement. The instrument acquires input voltage and current signals via a high-speed magnetic-isolation digital sensor to ensure reliable and safe data acquisition.

Main features

• Large LCD screen with full-menu operation for clear navigation.
• High-precision sampling circuit combined with Fourier harmonic analysis for robust measurement results.
• High-speed magnetic-isolation digital sensor for direct acquisition of voltage and current signals.
• Resistive-current fundamental peak output, edge-phase correction and related measurement functions.
• Integrated calendar clock, micro-printer and internal data storage for on-site documentation.

Alternate names / Nicknames

• Zinc oxide arrester tester
• Lightning arrester leakage current tester
• Lightning arrester tester

Technical specifications

• Reference voltage input range (peak): 10 V – 200 V (customizable 0–250 V).
• Full leakage current measuring range: 100 µA – 8 mA (customizable 0–20 mA).
• Resistive current measuring range: 100 µA – 8 mA (customizable 0–20 mA).
• Capacitive current measuring range: 100 µA – 8 mA (customizable 0–20 mA).
• Angle measuring range: 0° – 90°.
• Power consumption: 4 W.
• System measurement accuracy: ±(reading × 5% + 5 digits) (harmonic current ≤ 2 mA).
• AC power supply: AC 220 V ±10%, 50 Hz ±1%.