Theoretical analysis of BCI test system using circuit concept approach

In a bulk current injection test (BCI test), an electric current is injected into a wire harness connected to an electronic equipment. Since this test setup can be considered as a transmission line exposed to an external electromagnetic field, the relation of the line voltage and current is expressed by a modified telegrapher's equation. This paper reveals an analytical method of the BCI-test system using the circuit concept approach, and its effectiveness is experimentally verif ed. Furthermore, the difference between the susceptibility of transmission line exposed to the plane-EM field and that under the BCI test is shown as an example.