On-line zinc oxide lightning arrester state monitoring device

The utility model relates to an on-line zinc oxide lightning arrester state monitoring device. The on-line zinc oxide lightning arrester state monitoring device comprises a current signal acquisition module, an embedded system plate card, PT secondary three-phase voltage terminals, a bus voltage acquisition module, a data processing module, a background work station, a display and a data line, wherein micro current sensors of the current signal acquisition module are connected in series between grounding leads and a grounding point of a lightning arrester, an output end of the current signal acquisition module is connected with an input end of a signal processing unit, input ends of micro current sensors of the bus voltage acquisition module are respectively connected with the PT secondary three-phase voltage terminals through a voltage signal sampling protector, output ends of the micro current sensors of the bus voltage acquisition module are connected with the input end of the signal processing unit through another set of AD conversion, an output end of the signal processing unit is connected with the embedded system plate card, and the data line is respectively connected with the embedded system plate card and a background work station.