JPH01128173U

JPH01128173U -

Info

Publication number: JPH01128173U
Application number: JP2528388U
Authority: JP
Priority date: 1988-02-26
Filing date: 1988-02-26
Publication date: 1989-09-01

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例による電流測定装
置を示す断面図、第２図は従来の電流測定装置を
示す断面図である。１は導体、２は光磁界センサ、５ａ，５ｂは第
１及び第２の光フアイバ、６ａ，６ｂは第１及び
第２のレンズ装置、７は容器、８は中空の絶縁筒
、９は投光器、１０は受光器。なお図中、同一符
号は同一、又は相当部分を示す。 FIG. 1 is a sectional view showing a current measuring device according to an embodiment of this invention, and FIG. 2 is a sectional view showing a conventional current measuring device. 1 is a conductor, 2 is an optical magnetic field sensor, 5a and 5b are first and second optical fibers, 6a and 6b are first and second lens devices, 7 is a container, 8 is a hollow insulating tube, and 9 is a floodlight. , 10 is a light receiver. In the figures, the same reference numerals indicate the same or corresponding parts.

Claims

[Claims for Utility Model Registration] A hollow conductor that is housed inside a container of a gas insulated switch and that has a helical gap in a part, the ends of which are arranged at a constant distance in the axial direction of the conductor. a ferromagnetic member inserted into the conductor through a shaped gap; a ferromagnetic member provided between both ends of the ferromagnetic member inside a portion of the conductor where the spiral gap is formed;
an optical magnetic field sensor that imparts intensity modulation to passing light in proportion to the magnetic field in the axial direction of the conductor; a first optical fiber connected to the optical magnetic field sensor that introduces light into the optical magnetic field sensor; a second optical fiber connected to a magnetic field sensor for guiding light from the optical magnetic field sensor; a first optical fiber connected to the other end of the first optical fiber for introducing light into the first optical fiber; a lens device, a second lens device that is connected to the other end of the second optical fiber and that derives light from the second optical fiber, and a second lens device that connects the first and second lens devices to the gas insulated switchgear a hollow insulating tube fixed to the inside of the container; a floodlight fixed to the container so as to face the first lens device and supplying light to the optical magnetic field sensor; the second lens device a light receiver for receiving light from the optical magnetic field sensor, which is fixedly provided on the container so as to face the light receiver; and an electrical signal from the light receiver is processed to generate an electrical signal proportional to the current flowing through the conductor. A current measuring device comprising: a signal converter that outputs;