Common mode voltage measuring device and common mode voltage measuring method
AssigneeNippon Telegraph and Telephone Corporation
InventorsNaruto ARAI, Ken OKAMOTO, Jun KATO
Life of this patent
Estimating the term…
Abstract
A common-mode voltage measurement apparatus according to an embodiment includes a measurement electrode attached to a conductor capable of being brought into contact with a coated cable, a measurement circuit configured to measure a common-mode voltage generated in the cable, and a compensation circuit connected in series between the measurement electrode and the measurement circuit, the compensation circuit being configured to compensate for a parasitic capacitive component formed between the measurement electrode and the conductor.
Claims9
A common-mode voltage measurement apparatus comprising:
- a measurement electrode configured to be attached to a conductor capable of being brought into contact with a coated cable;
- a measurement circuit configured to measure a common-mode voltage generated in the cable;
- and
- a compensation circuit configured to be connected in series between the measurement electrode and the measurement circuit, the compensation circuit being configured to compensate for a parasitic capacitive component formed between the measurement electrode and the conductor.
A common-mode voltage measurement method performed by a common-mode voltage measurement apparatus, the common-mode voltage measurement apparatus including a measurement electrode configured to be attached to a metallic rod-shaped member capable of being brought into contact with a coated cable, a measurement circuit configured to measure a common-mode voltage generated in the cable, and a compensation circuit configured to be connected in series between the measurement electrode and the measurement circuit, the compensation circuit being configured to compensate for a parasitic capacitive component formed between the measurement electrode and the rod-shaped member, the common-mode voltage measurement method comprising:
- attaching the measurement electrode to the rod-shaped member in a state where the rod-shaped member is not electrically grounded and measuring the common-mode voltage with the measurement circuit in a state where the rod-shaped member is in contact with a coating of the cable.
A common-mode voltage measurement method performed by a common-mode voltage measurement apparatus, the common-mode voltage measurement apparatus including a measurement electrode configured to be attached to a human body capable of being brought into contact with a coated cable, a measurement circuit configured to measure a common-mode voltage generated in the cable, and a compensation circuit configured to be connected in series between the measurement electrode and the measurement circuit, the compensation circuit being configured to compensate for a parasitic capacitive component formed between the measurement electrode and the human body, the common-mode voltage measurement method comprising:
- attaching the measurement electrode to the human body in a state where the human body is not electrically grounded and measuring the common-mode voltage with the measurement circuit in a state where the human body is in contact with a coating of the cable.
Dependencies are inferred from the claim text.