PROCESS TESTING INSULATION OF SYMMETRIC COMMUNICATION CABLE Russian patent published in 2001 - IPC

FIELD: measurement technology, test of insulation of communication cables in operation. SUBSTANCE: invention deals first of all with multipair cables of telephone urban networks. Test pair is found in advance in communication cable, one transducer is placed along path of cable laying in each box with joining of face-to-face lengths of cable and transducers are connected to test pair. In this case insulated cable conductors of test pair are passed through holes in body of transducer. Metal members of transducer made in the form of cut-in contacts enclosed in polymer case, insulated one from another by hygroscopic material saturated beforehand with fast-solving matter, forming readily soluble solution with ingress of moisture are depressed ensuring connection of each metal members with one of conductors of test pair. Ends of hygroscopic material insulating metal members are brought out through holes in body of transducer. After it reflexometer is connected to conductors of test pair on one end of communication cable, reflexograms are taken, processed and used to find location of reduced resistance of insulation in boxes where transducers operate. EFFECT: enhanced sensitivity, decreased time of localization of cable insulation injury and diminished probability of communication circuit loss. 1 dwg