Method of measuring conducted disturbance using both capacitive voltage probe and current probe

Author

Hiroshima, Yasushi ; Miyashita, S. ; Kuwabara, Nobuo

Author_Institution

NTT Multimedia Networks Labs., Tokyo

fYear

1999

fDate

1999

Firstpage

798

Abstract

We developed a capacitive voltage probe with an electrostatic shield which can measure the common-mode voltage for any kind of cable. The configuration of the capacitive voltage probe is shown. It consists of two coaxial electrodes, a cable fixture, and a high-input impedance amplifier operated by a battery. The outer electrode is used as an electrostatic shield. When a voltage appears between the cable and ground, an induced voltage occurs between its inner electrode and electrostatic shield. The induced voltage depends on the kind of cable, so the input-output factor of the probe is needed for every cable. We measured the common-mode voltage of telecommunication equipment using the capacitive voltage probe and an impedance stabilisation network (ISN) with the setup according to CISPR22

Keywords

capacitive sensors; electromagnetic interference; shielding; telecommunication equipment testing; voltage measurement; CISPR22 test setup; capacitive voltage probe; coaxial electrodes; common-mode voltage measurement; conducted disturbance measurement; current probe; electrostatic shield; high-input impedance amplifier; impedance stabilisation network; induced voltage; inner electrode; input-output factor; telecommunication equipment; Battery charge measurement; Cable shielding; Coaxial cables; Current measurement; Electrodes; Electromagnetic measurements; Electrostatic measurements; Impedance; Probes; Voltage measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Electromagnetic Compatibility, 1999 International Symposium on

Conference_Location

Tokyo

Print_ISBN

4-9980748-4-9

Type

conf

DOI

10.1109/ELMAGC.1999.801457

Filename

801457