Cable elbow connector calibration for switching transients voltage measurements

Measurement of switching transient voltages appearing at various locations of Underground residential distribution (URD) power cables are vital for the online monitoring and diagnostics of cable insulation condition. The cable elbow connectors are manufactured with capacitive voltage test points to indicate the power frequency voltage on the cable conductor. The cable elbow connector voltage test points are proposed to measure switching transient voltages in cables. The test points are also used to measure standard lightning impulse. Using this technique, less expensive cable elbow connectors can be calibrated and installed widespread in underground residential distribution power cables for surge voltage transient measurements.