https://www.mktester.com/lightning-arrester-tester/zinc-oxide-arrester-integrated-tester.html
Zinc oxide arrester integrated tester is a dedicated instrument for detecting electrical performance of zinc oxide arresters such as power stations, substations. It is possible to accurately stabilize the parameters such as the arrester resistance current and the monitor counter action in the device operating state, and the monitor current table can also be verified. The instrument is sall, lightweight, and is fully functional, which is an ideal zinc oxide arrester characteristic measuring instrument. The instrument can be measured wirelessly or wirelessly, and the wireless transission distance can reach more than 1000 meters, which greatly facilitates the various measurement operations on large substation.