When procurement personnel select instruments for substation maintenance teams, they often receive feedback like this: taking arresters out of service, dismantling them, and sending them for testing involves long turnaround times, while live testing is affected by electromagnetic interference and yields poor data repeatability; there is a lack of unified measurement means for the DC breakdown voltage of surge protective devices and discharge tubes, so multiple devices can only be purchased separately. In response to these on-site situations, a test device that can handle both arrester and discharge tube parameters can reduce the variety of tools and personnel training costs.
The HZ-MOA600 is suitable for measuring the performance parameters of various arresters and surge protective devices, and also supports discharge tube measurement. The device can measure DC breakdown voltage Vsdc, with a measurement range of 20–1700 V and an operating error of no more than 3%. The preset voltage should be set below the upper limit of the range to ensure that the test process is completed within the set interval.
From a selection perspective, this instrument integrates arrester testing and discharge tube testing into the same main unit, reducing the number of on-site wiring changes; the DC breakdown voltage range covers the specifications of arresters and surge protective devices commonly found in low-voltage distribution and some medium-voltage scenarios. The instrument operates under the condition that the preset voltage is lower than the upper limit of the range, and the operation interface is divided by test item, making it easy for maintenance personnel to get started quickly after training.
The HZ-MOA600 can be used for routine inspection of arresters in distribution rooms, sampling inspection of surge protective devices at communication base stations, rechecking discharge tube parameters in lightning protection project acceptance, and preventive testing of electrical equipment in industrial and mining enterprises. For units that need to manage multiple types of lightning protection devices at the same time, this instrument can serve as one of the on-site measurement tools, used in conjunction with power-off testing and live detection processes.
