Title:
直流用検電器
Document Type and Number:
Japanese Patent JP4443793
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a direct-current electroscope having a function capable of detecting disconnection of an earthing wire simply and surely. SOLUTION: This direct-current electroscope is equipped with electroscope metal fittings 20 attached to the tips of insulating cylinders 111 -11n , and hooked over a stringing 1 to be blocked, to thereby be brought into electrical contact with the stringing 1, a detection part 30 installed on a part of the insulating cylinders 111 -11n and connected electrically to the fittings 20, for detecting a stringing voltage through the fittings 20 and informing of the detection information, and the earthing wire 32 for earthing the fittings 20 through the detection part 30. The detector is also equipped with a detection wire 39 having one end connected to a control power source 90 of the detection part 30 and the other end connected to a rail 38 of the earthing wire 32 to be brought into the electrically short-circuited state, and the disconnection of the earthing wire 32 can be detected by the detection wire 39.
Inventors:
Seiji Ogawa
Etsuro Nakazato
Takao Omori
Shuji Soda
Etsuro Nakazato
Takao Omori
Shuji Soda
Application Number:
JP2001180124A
Publication Date:
March 31, 2010
Filing Date:
June 14, 2001
Export Citation:
Assignee:
East Japan Railway Company
Hasegawa Electric Co., Ltd.
Hasegawa Electric Co., Ltd.
International Classes:
G01R19/155; G01R31/02; G01R15/14
Domestic Patent References:
| JP2000335286A | ||||
| JP2001083203A | ||||
| JP61003476U | ||||
| JP9251035A |
Attorney, Agent or Firm:
Hideka Tanaka
Yoshiyuki Shiraishi
Kunihiko Shiromura
Yoshiyuki Shiraishi
Kunihiko Shiromura