Title:
METHOD FOR APPLIED VOLTAGE TEST OF DC POWER CABLE
Document Type and Number:
Japanese Patent JP3127383
Kind Code:
B2
Abstract:
PURPOSE: To carry out both of applied voltage tests by using a direct current, since the conventional applied voltage tests use alternating currents for continuity, where as the test is for direct current, and there is a possibility of occurring such a case that evaluated results do not reflect those of actual lines.
CONSTITUTION: By using, for example, an auxiliary cable 20 prepared separately from a sample cable 14, an alternating current is made to flow through the auxiliary cable 20 through a current transformer 18 and the alternating current is converted into a direct current by means of a half-wave rectifier 22. Then the direct current is made to flow through the sample cable 14. It is possible to eliminate the need of the cable 20 when a closed circuit is formed by short-circuiting both ends of the cable 14 through a conductor and the rectifier 22 is connected to the conductor, and then, the transformer 18 is connected to the cable 14.
Inventors:
Tomoe Shibuya
Yoshio Komatsuzaki
Hideo Suzuki
Yoshio Komatsuzaki
Hideo Suzuki
Application Number:
JP19912392A
Publication Date:
January 22, 2001
Filing Date:
July 02, 1992
Export Citation:
Assignee:
Fujikura Ltd.
International Classes:
G01R31/00; (IPC1-7): G01R31/00
Domestic Patent References:
| JP5203690A |
Attorney, Agent or Firm:
Masatake Shiga (3 outside)
Previous Patent: JPH03127382
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