Glass Coating MOV leakage current meter are provided online, in order to monitor the health of the arrester. Live leakage ammeter reflected by external current and porcelain valve arrester currents through the insulation and arrester valve disk.
(1) Lightning Online abnormal increase in leakage current meter reading
Moisture within the metal oxide arresters is mainly caused by bad seal. Moisture sources are:
① the arrester production process, installation humidity exceeded;
② valve and internal parts drying is not complete, some moisture retention;
③ when assembling the seal leak put, put side. Or between the seal and the seal cover folder porcelain debris.
④ run after a period of damage caused by the sealing member into the tide.
(2) Lightning-line leakage current meter reading to reduce or even zero.
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