JP2535090Y2 - Tank type circuit breaker - Google Patents

Description

[Detailed description of the invention]

[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. According to this, the disconnector and the grounding device can be installed integrally with the circuit breaker, and there is an advantage that the installation area can be reduced.

By the way, when inspecting the circuit breaker main body in such a configuration, if the disconnector is opened, the inspection can be performed even if a voltage is applied to the disconnector. However, being in such a state of application of electricity means that a high voltage is being applied to the terminal at the tip of the bushing above the branch pipe. Therefore, the charging section is located close to the worker, which is extremely dangerous.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a construction in which a branch pipe is provided in a tank accommodating a circuit breaker main body, and a disconnector and a grounding device are housed inside the branch pipe. The purpose is to be able to easily achieve the protection of the elderly.

[0005]

According to the present invention, there is provided a tank type circuit breaker in which a branch pipe is provided in a tank accommodating a circuit breaker main body, and a disconnector and a grounding device are housed in the branch pipe. An insulating protective plate is provided on the upper part, and a space above the protective plate is blocked.

[0006]

By installing a protection plate during inspection of the circuit breaker, the tank containing the circuit breaker body and the terminal on the bushing are shielded by the protection plate. Therefore, even if the high voltage is still applied to the terminal, the operator who inspects the breaker body is not exposed to a dangerous state.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. Reference numeral 1 denotes a tank containing a circuit breaker main body 2 therein, which is installed on a gantry 3 or the like. The inside is evacuated or contains an insulating gas.

[0008] Reference numerals 4 and 5 denote a pair of branch pipes installed on the upper portion of the tank 1, which are closed containers independent of the tank 1.
The inside thereof contains a vacuum or an insulating gas, and is installed on the power supply side and the load side of the circuit breaker body 2. A bushing type current transformer 6 is installed on one or both branch pipes 4 and 5, and a bushing 7 is provided on the upper part thereof, and a terminal 8 is provided on an upper end thereof.

Inside the branch pipe 4, a disconnector 9 and a grounding device 10 installed coaxially are accommodated. Reference numeral 11 denotes a connecting rod for operating the disconnector 9 of each phase in common, and 12 denotes a reinforcing rod for connecting the branch pipes of each phase to improve their seismic performance.

When the circuit breaker body 2 is inspected, the disconnector 9 is opened while the insulating gas in the branch pipe 4 is sealed, the circuit breaker body 2 is grounded via the grounding device 10, and the tank is opened. 1 is performed by removing the insulating gas. If you do this,
Inspection is possible with the high voltage applied to the terminal 8.

However, as described above, such an inspection operation exposes the worker to a dangerous state. Therefore, in the present invention, an insulating protection plate 13 is installed at the time of inspection so as to block the upper part of the branch pipes 4 and 5. Protection plate 1
Numeral 3 is installed so as to straddle between branch pipes 4 and 5 having the same phase.

That is, as shown in FIG. 2, the protection plate 13 has a pair of parallel lateral grooves 14 formed therein.
The branch pipes 4 and 5 are attached to both the branch pipes 4 and 5 so that the branch pipes 4 and 5 are fitted to each other. In this case, it is convenient to place and support on the connecting operation rod 11 and the reinforcing rod 12. If it is fixed with insulating bolts or the like in this mounted state, its mounting state will be safer.

As described above, the protection plates 13 allow the branch pipes 4, 5,
When the circuit breaker main body is inspected by blocking the upper part of the circuit breaker from the bushing 7 and thus the terminal 8, even if the terminal 8 is a charged part, the worker can be shielded from the charged part.

[0014]

According to the present invention, as described above, according to the present invention, in a tank type circuit breaker in which a disconnector and a grounding device are incorporated in a tank containing a circuit breaker body, a worker is charged when the circuit breaker body is inspected. An effect that can be easily protected from the part is exerted.

[Brief description of the drawings]

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

FIG. 2 is a partial plan view of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tank 2 Circuit breaker main body 4 Branch pipe 5 Branch pipe 7 Bushing type current transformer 8 Terminal 9 Disconnector 10 Grounding device 13 Protection plate

Claims (1)

(57) [Scope of request for utility model registration] 1. An upper part of a tank for storing a circuit breaker body,
Install a pair of branch pipes, at the top of each branch pipe, at the tip
Equipped with terminals connected to the power supply side and load side of the breaker body
A bushing, and inside one of the branch pipes,
When inspecting the breaker body, disconnect the breaker body.
Open the disconnector and the circuit breaker body to ground
Protective plate formed with a pair of parallel horizontal grooves in a tank type circuit breaker incorporating a grounding device for
In each of the lateral grooves, above each of the two branch pipes in phase.
Do not fit over both branch pipes by fitting.
The protective plate is used to move the upper part of each branch pipe to the branch pipe.
A tank-type circuit breaker that is shielded from the bushing provided in the tank.