Charged Cable Discharge Events Model and Performance Measurement


Firstly, cable voltage charging by rotating and rubbing on floor was measured referred to standard of IEC 61340-4-5, and category 6 ethernet cable voltage was measured. Secondly, based on measurement of the cable voltage waveform, the cable voltage equivalent RC circuit model was deduced, and exponential function can be obtained to describe the cable voltage, the time constant τ is determined by the cable resistance R and capacity C to the ground. Thirdly, the current, transient electric field and magnetic field was measured while the charged cable discharging on the metal target. At last, the current waveform was compared with MIL-STD-461F CS115 conducted susceptibility, bulk cable injection and impulse excitation. The results show that the CDE current waveform is similar, but current is higher. Therefore, the CDE protection method is required and the EMC testing standard needed to be improved to cover CDE measurement.


Electrical and Computer Engineering

Research Center/Lab(s)

Electromagnetic Compatibility (EMC) Laboratory

Keywords and Phrases

Electric fields; Electromagnetic compatibility; Exponential functions; Cable discharge events; Cable voltages; Equivalent RC circuit; Impulse excitations; Performance measurements; Protection methods; Time-domain waveforms; Transient electric fields; Cables; Electro-static discharge (ESD)

International Standard Serial Number (ISSN)


Document Type

Article - Journal

Document Version


File Type





© 2015 Chinese Research Institute of Radiowave Propagation, All rights reserved.

Publication Date

01 Dec 2015