By generating signals and using selective measurements different from the power system frequency, the combination of an Omicron CPC 100 and an Omicron CP CU1 is able to obtain very accurate results. The CP CU1 coupling unit is used to safely connect the inputs and outputs of the CPC 100 to a transmission line. The grounding box CP GB1 is used to make the connection between the CP CU1 and the overhead line and can be located at a safe distance from the operator.

To measure line impedance and k-Factor or the mutual coupling factor, the CPC 100 and CP CU1 operate at a nonsystem frequency allowing the user to measure all fault loop configurations (phase to ground, phase to phase and three phase to ground). This provides accurate measurement of impedance magnitude and phase angle for lines with lengths of up to 300 km.

Conventional ground impedance test methods using power system frequencies need enormous power and complicated methods to overcome the problems of interference. By varying the frequency and using narrowband digital filtering with the CPC 100 and CP CU1 reduces the required power to a minimum. The inductive coupling impedance between a power system and adjacent cables can also be measured using the CPC 100 and CP CU1 test system.

Brief Specs: