JP2000324628A - Power circuit breaking device with terminal extension conductor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To equip a terminal extension conductor in rigid and simpler structure by burying the main body part of the terminal extension conductor into an insulator for forming as an integral extension conductor assembly, connecting the upper end of the extension conductor assembly to a break part by a connection conductor, and connecting a low end to a truck. SOLUTION: Fittings 4a are sealed near the tip part of the upper surface of a truck frame 4, and the lower end of an extension conductor assembly is fixed to the fittings 4a by a bolt 9a while the lower end is placed on the truck frame 4. A fixed contact extension conductor 5a projected at the upper end of the extension conductor assembly is connected to the fixed contactor of a vacuum circuit breaker 2a for composing a break part 2 by a bolt 9b using a flexible conductor 7 and a reinforcing member 7a. A movable contactor side extension conductor 5b is connected to the movable contactor by a flexible conductor 8, thus simplifying the structure of the truck, improving sharing property, and improving rigidness in structure using an economical extension conductor assembly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power circuit breaker having a circuit breaker mounted on a bogie, and more particularly, to a terminal extension conductor provided for adjusting a connection size between the circuit breaker and a main circuit conductor. The present invention relates to a power circuit breaker having the following.

[0002]

2. Description of the Related Art In a closed switchboard or the like, a mismatch between a terminal position of a circuit breaker and a conductor position of a main circuit often occurs, and it is often necessary to add a terminal extension conductor to the circuit breaker side. For example, when switching from an oil circuit breaker to a vacuum circuit breaker when updating a circuit breaker of a closed switchboard, the terminal position on the circuit breaker side changes before and after replacement due to a difference in terminal structure.
FIG. 3 shows an example of a coping method in such a case. The figure shows
It is sectional drawing of the main part of the electric power circuit breaker using the vacuum circuit breaker mounted on the bogie. The operating mechanism 1 and the blocking unit 2 are mounted on and fixed to the bogie frame 4, and the connecting link 3 mechanically connects the two. The extension conductor assembly 5 is formed integrally by embedding the main portions of the fixed contact-side extension conductor 5a and the movable contact-side extension conductor 5b except for both ends in the insulating material 5c for each phase. The extension conductor assembly 5 is fixed to the support frame 6 attached to the bogie frame 4 with bolts 9 at its upper and lower parts for each phase, and the fixed conductors of the vacuum circuit breaker and the fixed contact side by flexible conductors 7 and 8. The extension conductor 5a connects the movable contact and the movable contact side extension conductor 5b. The support frame 6 must withstand the mechanical force required for attaching and detaching the mating type connection part in connection and separation between the extension conductors 5a and 5b and the main circuit side, and the electromagnetic force due to a large current in a short circuit accident or the like. A strong mechanical structure is required.

[0003]

In the conventional circuit breaker, a terminal extension conductor is embedded in an insulator to form an extension conductor assembly 5, which is fixed to a support frame 6 attached to one end of the bogie frame 4. Therefore, the bogie frame 4 requires a plurality of additional parts having a strong structure for mounting the circuit breaker terminal extension conductors, which has become a factor of complicating the configuration of the bogie frame 4. SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a power circuit interrupting device including a terminal extension conductor having a rigid and simple structure.

[0004]

The main body of each of the two terminal extension conductors except for both ends is embedded in an insulator to form an integral extension conductor assembly, and the upper end of this extension conductor assembly is connected to one of the blocking portions. And the lower end is connected to the carriage.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, a power circuit breaker including a terminal extension conductor according to a first embodiment of the present invention will be described with reference to the drawings. Parts that are the same as or correspond to those of the conventional power circuit breaker described with reference to FIG. 3 are denoted by the same reference numerals, and overlapping description will be omitted. FIG. 1 is a front view of a power circuit breaker provided with a terminal extension conductor according to the present invention, and FIG. 2 is a cross-sectional view taken in the direction of arrow AA in FIG. A metal fitting 4a is fixed in the vicinity of the tip of the upper surface of the bogie frame 4, and the extension conductor assembly 5 is fixed to the metal fitting 4a by a bolt 9a with the lower end thereof placed on the bogie frame 4. On the other hand, a fixed contact-side extended conductor 5a protruding from the upper end of the extended conductor assembly 5 comprises a flexible conductor 7 as a fixed contact of a vacuum circuit breaker 2a constituting the interrupting section 2 and a reinforcing member 7a stacked thereon. And are connected by bolts 9b. The movable contact-side extension conductor 5b is connected to the movable contact by a flexible conductor 8. The use of the flexible conductor 7 for connection between the fixed contact and the fixed contact-side extension conductor 5a is to ensure the electrical connection between the members constituting the power cutoff device even if there is a dimensional error. It is.

Since the extension conductor assembly 5 is fixed to the cut-off portion 2 at both the upper and lower ends thereof, an insulating material 5c is provided near the upper end side of the fixed contact-side extension conductor 5a in order to secure a creeping insulation distance between the extension conductor assembly 5 and the ground portion. It is economical because it is not necessary to provide an extension.
For this reason, the fixed contact-side extended conductor 5a is composed of the conductor 5a1 embedded in the extension conductor assembly 5 and the bolt 5
Since it can be composed of the conductor 5a3 connected by a2, the main part of the extension conductor assembly 5 can be shared even if the size of the vacuum circuit breaker 2a varies. Of course, conductor 5
a1 and the conductor 5a3 are integrally formed, and this is
Needless to say, it may be configured so as to be embedded in the file.

[0007]

According to the first aspect of the present invention, there is provided a power circuit interrupting device having a terminal extension conductor, wherein a main portion of each of the two terminal extension conductors except for both ends is embedded in an insulator to form an integrated extension conductor assembly. Since the upper end of the extension conductor assembly is connected to one terminal of the cut-off part and the connection conductor, and the lower end is connected to the trolley, the structure of the trolley is simple, highly versatile, and uses an economical extension conductor assembly. It is possible to provide a power circuit breaker provided with a substantially rigid terminal extension conductor.

[Brief description of the drawings]

FIG. 1 is a front view of a power circuit breaker including a terminal extension conductor according to the present invention.

FIG. 2 is a cross-sectional view as seen in the direction of arrow AA in FIG.

FIG. 3 is a cross-sectional view of a main part of a conventional power circuit breaker including a terminal extension conductor.

[Explanation of symbols]

1 operation mechanism section, 2 interruption section, 3 connection link, 4 trolley frame 5 extension conductor assembly

Claims (1)

[Claims] An interrupting section mounted on a truck, an operating mechanism mechanically connected to the interrupting section, and two terminal extension conductors connecting two terminals of the interrupting section to an external electric circuit;
In a power circuit breaker having a configuration in which the terminal extension conductor is bent in a vertical direction, a main body portion of each of the two terminal extension conductors except for both ends is embedded in an insulator to form an integrated extension conductor assembly, A power circuit interrupter including a terminal extension conductor, wherein an upper end of the extension conductor assembly is connected to one terminal of the interrupter by a connection conductor, and a lower end is connected to the carriage.