Main loop resistance testing method for 1000-kilovolt GIS

The invention discloses a main loop resistance testing method for 1000-kilovolt GIS. The method comprises the steps of connecting a current injection end anode and a voltage detecting end anode of a testing device with a lead phase head end; connecting a voltage detecting end cathode of the testing device with a lead phase end; shorting a conductive-phase metal closing layer at the end; connecting the current injection end cathode of the testing device with a segment connecting part which is closest to the head end of the lead phase; acquiring testing voltage and calculating resistance. According to the main loop resistance testing method for the 1000-kilovolt GIS, through using a metal closing layer outside the main loop of the tested 1000-kilovolt GIS as a conductor for measuring the circuit resistance, the testing method is not affected by length of the tested equipment, and furthermore the number of a large number of large-diameter testing conductors is reduced, thereby realizing low cost. The main loop r