Fully automatic secondary cable insulation resistance auxiliary testing device and method thereof

The invention discloses a fully automatic secondary cable insulation resistance auxiliary testing device and method thereof. The device comprises a casing, which is internally equipped with a PLC programmable controller, a normally open relay control module and a power module, and a casing panel embedded thereon The utility model has a display screen, a plurality of cable core access terminals andtwo test connection terminals, wherein the cable core access terminals are respectively connected to a plurality of cable cores and a ground core in the secondary cable, and the test connection terminals are connected to the electronic megohm meter Two test leads, and each cable core access terminal and two test connection terminals are respectively connected by wires, and the power module is connected to the PLC programmable controller to supply power to the test device; the normally open relay control module includes multiple normally open The relays are respectively connected in series between the cable access ter