Title:
DEVICE AND METHOD FOR SPECIFYING A TROUBLE POINT IN CABLE
Document Type and Number:
Japanese Patent JP2002333461
Kind Code:
A
Abstract:
To prevent a trouble such as burning from being generated in a pair of ratio arm resistances 2, 3 and a galvanometer 4 by receiving induction from other cable existing in a periphery of a measuring circuit.
An electrostatic capacity 11 of which the impedance in an alternating current is sufficiently smaller than those of a troubled cable 7 and a sound cable 8 is connected in parallel to the galvanometer 4. A low path filter 12 of which the shielding frequency is lower than a frequency of an induced current is also provided between end parts of the paired ratio arm resistances 2, 3 and the galvanometer 4.
Inventors:
KOBAYASHI SHINICHI
ISHIHARA ISATO
KAWASAKI KATSUTOSHI
ISONO SHIGEKI
MAKISHIMA TAKAMITSU
ISHIHARA ISATO
KAWASAKI KATSUTOSHI
ISONO SHIGEKI
MAKISHIMA TAKAMITSU
Application Number:
JP2002058581A
Publication Date:
November 22, 2002
Filing Date:
March 05, 2002
Export Citation:
Assignee:
CHUBU ELECTRIC POWER
MITSUBISHI CABLE IND LTD
MITSUBISHI CABLE IND LTD
International Classes:
G01R31/08; (IPC1-7): G01R31/08
Attorney, Agent or Firm:
Takeo Koyama (2 outside)
Previous Patent: SIGNAL DISCRIMINATOR
Next Patent: INTEGRATED CIRCUIT, AND METHOD FOR TESTING INTEGRATED CIRCUIT
Next Patent: INTEGRATED CIRCUIT, AND METHOD FOR TESTING INTEGRATED CIRCUIT