JPS5975158A - Electric device - Google Patents

Abstract

PURPOSE:To facilitate the attachment and detachment of a magnetic sensor by arranging the magnetic sensor which detects a current flowing through the conductor in a container made of a conductive member between said container and a magnetic shield. CONSTITUTION:Containers 1, 2, and 3 arranged in parallel are constituted by coupling in series the 1st cylindrical bodies 1a, 2a, and 3a made of conductive members and the 2nd cylindrical bodies 1b, 3b, and 3b through insulating members 1c, 2c, and 3c. Conductors 4, 5, and 6 for feeding are arranged piercing the containers 1, 2, and 3. Short-circuiting members 7a and 7b are provided between both ends of the containers 1, 2, and 3. Then, circular magnetic shields 8, 9, and 10 made of conductors or magnetic bodies are arranged coaxially with the conductors to encircle the respective containers, and both end parts are connected to the flanges of the 1st and the 2nd cylindrical bodies electrically. Then, magnetic sensors 11- are provided between the container 1, 2, and 3, and magnetic shields 8, 9, and 10.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrical device capable of measuring the current flowing through a conductor within a container.

As shown in Figures 1 and 2, the conventional electric device has a magnetic sensor that detects the current in each phase.A θ40 frame is placed inside each container (1), (2), and (3). So,
Magnetic sensor 01) (Iaα installation and maintenance work was difficult.

This invention was made to eliminate the above drawbacks.
A container is constructed by connecting first and second cylinders made of conductive members in series through an insulating member in the axial direction, and each end of a magnetic shield surrounding the container is electrically connected to each cylinder. do,
To provide an electric device in which attachment and detachment of a magnetic sensor and maintenance work can be easily performed by arranging the magnetic sensor between a magnetic shield and a container.

The figures will be explained below. In FIGS. 3 and 4, (1), (2), and (3) are containers arranged approximately in parallel, with first cylinders (1a) (2a) made of conductive members.
(8a) and second cylindrical bodies (1b), (2b), and (8b) are connected in series via insulating members (lc), (2c, and 8c). (1d) (2d) (8d) are flanges provided on each first cylinder (la) (2a) (8a), (1e) (2e) (8e) are flanges provided on each second cylinder body (la) (2a) (8a)
The flanges provided on the cylinder body (lb) (2b) (8b), (4) (5) (6) are each container (I) (2)
(3) A current-carrying conductor placed through the (7a)
(7b) is a short-circuiting member that connects one end side of the containers (1), (2), and (3) and the other end sides of the containers (1), (2), and (3), respectively. By providing the shorting members (7a) (7b), each conductor (4) is connected to the container (1) (2) (3).
) (5) An induced current flows in the opposite direction to the current flowing through (6), reducing magnetic flux leakage to the outside of each container (1), (2), and (3). (8) (9) () Oldly known as a circular magnetic shield made of conductive or magnetic material. Container (1) (2
) (3) and surrounds the containers (1) (2) (3) coaxially.

Magnetic shield (8) (9) One end of θ0 is a flange (
ld) (2d) (8d), and the other end is electrically connected to the flange (Ie) (2e) (8e). In addition, each magnetic shield (8) (9)
Di is attached to each conductor (4) to facilitate assembly work.
(5) It is divided on the straight line connecting (6). α])
0-@ (13 is a magnetic sensor composed of a search coil, a Hall element, a magneto-optical element, etc.)
(2) The insulating member (Ic) is attached to the flange (1d) (2d) (3d) so as to be operated by the circumferential magnetic field of (3).
(2c) First container (Ia) on the (8c) side (2a)
(8a) and the magnetic shields (8), (9), and (10).

The induced current that circulates through the shorting member (7) flows through the second cylinder (lb) (2b) (8b) - flange (le) (
2e) (8e) - Magnetic shield (8) (9) QO
-Flange (ld) (2d) (8d) -Flange (
1d) (2d) (8d) flows with the first cylindrical body (1a) (2a) (8a) closer to the shorting member (7a). Therefore, the flanges (1d) (2d) (8d) and the insulating member (l
c) The first cylinder (la) between (2c) and (8c)
(2a) (8a) That is, magnetic sensor 01)
1. The first cylinder (la) inside the 120.1 (2
a) No induced current flows through (8a) through the shorting members (7a) and (7b). As a result, the influence of the induced current on the magnetic sensors (11) (6) 0.3 is extremely small.

Also, magnetic shield (8) (9) QQ is container (])
(2) Since it is arranged coaxially with (3), the magnetic field due to the current of the conductors (4), (5), and (6) in its own phase easily passes through the θ field of the magnetic sensors 01) and (6).

In addition, as shown in FIG. 5, the first cylindrical body (la) (2a
) (8a) flange (ld) (2d) (8d)
It is also effective to construct a cylindrical insulator (lb) (2b) (8t) between the flange (Ie) (2e) (8e) and the flange (Ie) (2e) (8e).

As described above, according to the present invention, a container is constructed by connecting the first and second cylindrical bodies made of a conductive member in series via an insulating member, and a plurality of containers are arranged approximately in parallel. A conductor was passed through each container, each end of the magnetic shield surrounding the container was electrically connected to each cylinder, and a magnetic sensor was placed between the magnetic shield and the container. Installation, removal, and maintenance work are easier.

[Brief explanation of drawings]

1 is a perspective view of a conventional electrical device, FIG. 2 is a sectional view of FIG. 1, FIG. 8 is a perspective view of an embodiment of the present invention, FIG. 4 is a sectional view of FIG. 8, and FIG. The figure is a sectional view of another embodiment of the invention. In the figure, (1) (2) (3) are containers, (l
a) (2a) (8a) is the first cylinder, Qb) (2
b) (8b) is the second cylinder, (lc) (2c) (
8c) is an insulating member, (4) (5) (6) is a conductor, (
8) (91GO is magnetically shielded, (11) Q2 (
J3 is a magnetic sensor. Note that the same reference numerals in each figure indicate the same or corresponding parts. Agent Shin Kuzuno - Figure 1 Figure 2

Claims (1)

[Claims] (1) First and second cylindrical bodies made of conductive members are connected in series in the axial direction via an insulating member to form a container, and a plurality of the containers are arranged approximately parallel to each other. A current conductor is passed through each container, electrically connected between one end of each of the containers and the other end thereof, and each end of the magnetic shield surrounding the container is electrically connected to each of the cylindrical bodies. 1. An electrical device, characterized in that a magnetic sensor is arranged between the magnetic shield and the container to detect the current in the conductor.