FIELD: electricity.
SUBSTANCE: method for insulation resistance measurement at connections and search of connections with damaged insulation in direct-current mains with insulated neutral is based on measurement of currents passing through the mains connections upon coupling of a resistive element to poles. Simultaneously voltage is balanced at the poles by coupling two in-series identical resistors, which common point is connected to the ground through the third resistor. Values of insulation equivalent resistance for connections are calculated according to the formula that uses only measured differential currents as a variable.
EFFECT: simplifying measurement of connections resistance and search of connections with damaged insulation.
1 tbl, 6 dwg
