The zinc oxide arrester tester is a specialized instrument used for testing the electrical performance of zinc oxide arresters. The zinc oxide arrester tester is applicable for both live and de-energized detection of zinc oxide arresters of various voltage levels, enabling timely detection of dangerous defects such as internal insulation moisture and valve plate aging of the equipment.
The zinc oxide arrester tester is simple to operate and convenient to use. The entire measurement process is controlled by a single chip microcomputer. It can measure the total current, resistive current and its harmonics, power frequency reference voltage and its harmonics, active power and phase difference of the zinc oxide arrester. The large screen can display the true waveforms of voltage and current.
The zinc oxide arrester tester utilizes digital waveform analysis technology and employs software anti-interference methods such as harmonic analysis and digital filtering to ensure accurate and stable measurement results. It can accurately analyze the content of fundamental wave and 3rd to 7th harmonics, and can overcome the influence of phase-to-phase interference, enabling correct measurement of the resistive current of the side-phase arrester. This device is equipped with a high-speed panel-mounted printer and rechargeable batteries, making it very convenient for the test personnel to use on-site.
The zinc oxide arrester tester adopts a unique high-speed magnetic isolation digital sensor to directly collect the input voltage and current signals, ensuring the reliability and security of the data. The measurement principle of the zinc oxide arrester tester is that the input current and voltage are digitally filtered, the fundamental wave is extracted, and then the resistive current fundamental wave peak value Ir1p = Ix1p.cosφ is calculated using the projection method. Since the fundamental wave value is stable, currently, Ir1p is widely used to measure the performance of the arrester.
The fundamental peak value of the total current Ix1p of the zinc oxide arrester tester, projected in the direction of the voltage fundamental component U1(E1), is Ir1p, while the projection in the vertical direction is Ic1p. The angle φ represents the phase angle between the current and voltage fundamental components. This angle includes the selected compensation angle. Therefore, both φ and r1p can be used to intuitively measure the performance of the MOA.
Post time: Jul-28-2026