JP2503267Y2 - Tank type circuit breaker - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tank type circuit breaker.

[0002]

2. Description of the Related Art In a gas-type or vacuum-type tank circuit breaker, a pair of branch pipes are provided at an upper portion of a tank accommodating a circuit breaker body, and a disconnector and a grounding device are provided inside one of the branch pipes. Is separately proposed by the present inventors. In the tank type circuit breaker having such a configuration,
In addition, arresters and transformers for measuring instruments may be attached.

FIG. 7 shows a conventional structure thereof, in which 1 is a tank containing a circuit breaker main body 2 inside a vacuumed or insulative gas, which is mounted on a pedestal 3. There is. Reference numerals 4 and 5 denote branch pipes installed in the upper portion of the tank 1, and each pair has a pair for each phase. Bushing type current transformers 6 are installed above the branch pipes 4 and 5, and bushings 7 and 8 are installed above them. Bushing 7
The main circuit terminal 9 connected to the power source side is provided at the upper end of the main circuit terminal 1, and the main circuit terminal 1 connected to the load side is provided at the upper end of the bushing 8.
It has 0.

Inside the one branch pipe 4, a disconnector 11 and a grounding device 12 are housed. Reference numeral 13 is a fixed contactor of the disconnector 11, and 14 is a movable contactor of the same, which is driven by a driving unit 15 operated from the outside and is separated from the fixed contactor 13. Tank 1, branch pipes 4, 5, bushings 7, 8
Etc. are prepared for each phase and arranged in parallel with each other (see FIGS. 1 and 2).

In such a structure, when an arrester and a transformer for an instrument are additionally provided, conventionally, separate mounts 16 and 17 are provided in the lateral direction of the tank type circuit breaker, and the arrester 1 is mounted on each mount.
8. The transformer 19 for instruments was mounted, and these were connected to the disconnector 11 via the gas-insulated connection bus 20. Reference numeral 21 denotes a connecting pipe that hermetically houses the connecting bus bar 20.

However, when the mounts 16 and 17 are separately placed and the arrester 18 and the instrument transformer 19 are mounted on the mounts 16 and 17 as described above, the length required for the entire installation becomes long in the lateral direction, and the installation area is accordingly increased. It has the drawback of becoming wider.

[0007]

SUMMARY OF THE INVENTION The present invention provides a tank type circuit breaker in which a branch pipe is provided in a tank for accommodating a main body of a circuit breaker, and a disconnector and a grounding device are accommodated in the branch pipe. When installing a transformer, it is intended to avoid expanding the installation area.

[0008]

SUMMARY OF THE INVENTION The present invention provides a tank type circuit breaker in which a branch pipe is provided in a tank for accommodating a main body of a circuit breaker, and a disconnecting switch and a grounding device are accommodated in the branch pipe. The space between the pipes and between the branch pipes of the same phase is used to install the arresters and the transformers for measuring instruments.

[0009]

[Operation] Since the arrester and the transformer for the instrument are installed by utilizing the space existing in the gantry equipped with the tank type circuit breaker, they are all installed on the same gantry. Compared with the conventional configuration in which separate mounts are prepared and an arrester and an instrument transformer are mounted on each of them, the total installation area can be sufficiently reduced.

[0010]

Embodiments of the present invention will be described with reference to the drawings. In addition, the same reference numerals as those in FIG. 7 indicate the same or corresponding portions. According to the present invention, among the branch pipes of the same phase, the side face of one branch pipe 4 in which the disconnector 11 and the grounding device 12 are incorporated, to be precise, on the side face along the juxtaposed direction of the branch pipes of each phase, One end of each of the arrester 18 and the instrument transformer 19 is connected.

Reference numeral 22 is a connecting pipe of the connecting conductor 23 inside.
The connection conductor 23 is connected to the arrester 18 via the connection conductor 24 and to the measuring instrument transformer 19 via the connection conductor 25. The connecting conductor 23 is the spacer 2
It penetrates through 6 and is connected to the connection conductor 27 in the branch pipe 4. The connecting conductor 27 is connected to the disconnector 11.

The arrester 18 is installed downward from between the branch pipes of the adjacent phase, and its lower end is supported on the pedestal 3 via a fixed frame 28. The other end of the instrument transformer 19 is installed laterally toward the other branch pipe 5 side of the same phase. If necessary, this end may be supported by a fixed frame 30 fixed to a reinforcing frame 29 connecting the branch pipes 5 of each phase.

The arrester 18 and the instrument transformer 19 may be installed at opposite positions. That is, illustrated arrester 1
At the position of 8, the instrument transformer 19 and the instrument transformer 19
The arrester 18 may be installed at the position.

According to the above configuration, the arrester 18 and the instrument transformer 19 are mounted on the pedestal 3 on which the tank type circuit breaker is mounted, so that the arrester 18 and the instrument transformer 19 are installed. There is no need to prepare the required space.

[0015]

As described above, according to the present invention, when the tank type circuit breaker requires the installation of the arrester and the transformer for the instrument, the space for the installation of them is not necessary, and these are the tanks. Since it will be mounted on a gantry equipped with a circuit breaker, the installation area can be sufficiently reduced as compared with the conventional configuration.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is a left side view of the main part of FIG.

FIG. 4 is a right side view of a main part of FIG.

FIG. 5 is an enlarged view of a part of FIG.

FIG. 6 is a single line connection diagram showing a connection relationship.

FIG. 7 is a side view of a conventional example.

[Explanation of symbols]

 1 Tank 2 Circuit breaker main body 3 Frame 4 Branch pipe 5 Branch pipe 11 Disconnector 12 Grounding device 18 Arrestor 19 Transformer for instrument

Claims (1)

(57) [Scope of utility model registration request] 1. A tank for accommodating a circuit breaker body, and a pair of in-phase branch pipes installed at an upper portion of the tank and having a disconnector and a grounding device incorporated therein For each tank type circuit breaker installed side by side on the gantry, an arrester and a meter are provided on the side surface of each one of the branch pipes in which the disconnecting switch and the grounding device are installed, along the arranging direction. One end of each transformer is connected, and the other end of the arrester and one of the instrument transformers is installed downward from between the branch pipe of the adjacent phase and supported on the pedestal. In addition, a tank type circuit breaker in which the other end of the arrester and the transformer for instrument is installed laterally toward the other branch pipe side of the same phase.