Insulating state on-line monitoring method of cross-linked PE cable

The invention discloses online monitoring method of the insulation state method for crossing polyethylene insulated power cable that adopts DC superposing method to take online testing for the three phase XLPE power cable. After gaining the parameters, GPRS would send it to host computer, which would take analysis to the data and judge the insulation state. The invention realizes unattended operation online monitoring and wireless remote controlling and measuring.