JPH0724763Y2 - Tank type circuit breaker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a tank type circuit breaker.

(Prior Art) In a tank type circuit breaker such as a gas type or a vacuum type, a configuration in which a bushing type current transformer is installed above a tank that houses the circuit breaker body is well known.

However, when connecting this type of circuit breaker to the line of the distribution line,
It is necessary to connect a disconnector, a grounding device and an instrument transformer to this. Conventionally, these have been constructed and installed separately from the circuit breaker.

(Problems to be solved by the invention) However, according to such a configuration, the circuit breaker, the disconnecting switch, the grounding device, the transformer for the instrument, and the like must be separately manufactured, and the installation area of these is also required to be large. There are drawbacks such as doing.

It is an object of the present invention to downsize the structure for connecting a circuit breaker to a line and reduce the area required for installation.

(Means for Solving the Problem) The present invention proposes a unit in which a disconnector and a grounding device are incorporated between a tank accommodating a main body of a circuit breaker and a bushing type current transformer as a bushing type current transformer. It is characterized in that it is provided coaxially, this unit is connected to the tank for connection, and the tank for accommodating the instrument transformer is connected to the unit.

(Operation) Since the tank and the unit are connected so as to communicate with each other, the inside of both the tank and the unit is in a vacuum or gas atmosphere. Therefore, the disconnector and the grounding device can also be made compact, so even if a unit is installed between the tank and the bushing type variable flow path, there is no great difference from the configuration of the conventional tank type circuit breaker alone. can do.

Further, since the tank that houses the transformer for the instrument is connected to the unit and installed, the installation area for the transformer for the instrument can be reduced.

(Embodiment) An embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a tank which houses the circuit breaker main body 2 therein, and is installed above the pedestal 3. The inside is evacuated or contains an insulating gas.

4 is a bushing type variable flow path, which is located above the tank 1.
Moreover, it is installed on both the power supply side and the load side of the circuit breaker body 2. A bushing 5 has a main circuit terminal 6 at its upper end. The above configuration is not particularly different from the conventional configuration.

According to the present invention, a unit 9 having a disconnector 7 and a grounding device 8 incorporated therein is prepared so as to be coaxial with the bushing type current transformer 4, and the unit 9 is connected to the tank 1. Therefore, the bushing type current transformer 4 is installed above the unit 9.

To explain this in detail, 10 is a fixed contact of the disconnector 7,
Reference numeral 11 is also a movable contactor, which is movably operated by the drive unit 12. Reference numeral 13 denotes a grounding rod of the grounding device 8, which is driven by a driving unit 14 in its longitudinal direction. When the fixed contact 10 side is contacted, the fixed contact 10 side which is the power source side is grounded.

Reference numeral 15 is an inspection lid that is opened when the inside of the unit 9 is inspected, 16 is an electric operator housing equipment for operating the drive units 12 and 14, and 17 is equipment for operating the circuit breaker body 2. It is a stored electric actuator.

In the configuration shown in the figure, the unit 9 is installed on the power source side of the circuit breaker main body 2, but instead of this, it may be installed on the load side. For that purpose, the length of the unit 9 and the length of the branch pipe 18 on the load side should be the same.

The inside of the unit 9 and the inside of the tank 1 are in communication with each other. Therefore, the inside of the unit 9 is in a vacuum or an insulating gas atmosphere.

Therefore, the insulation distance between the disconnector 7 and the grounding device 13 can be shortened. As a result, the disconnector 7 and the grounding device 13 can be downsized, so that the unit 9 can be easily housed.

In this invention, a tank 21 for accommodating the instrument transformer 20 is further prepared, and this is connected to the unit 9 through a connecting pipe 22. Then, the instrument transformer 20 is connected to the grounding device 8 (or the disconnector 7).

In this case, if the inside of the tank 21 is also connected to the inside of the unit 9, it is convenient that the inside of the tank 21 becomes a vacuum or an insulating gas atmosphere.

By connecting the tank 21 to the unit 9 in this way, it becomes possible to omit the area required for installing the instrument transformer 20.

Although the tank 21 is arranged vertically in the drawing, it may be arranged horizontally.

The configuration shown in the figure shows an example in which one meter transformer is installed, but when two meter transformers are required, another meter transformer may be arranged between other phases.

(Effects of the Invention) As described in detail above, according to the present invention, by incorporating a disconnecting switch, a grounding device, and a transformer for a meter into a tank type circuit breaker, it can be combined to the extent that there is no great difference from the conventional circuit breaker unit As a result, it is possible to reduce the size, and it is also possible to reduce the installation area required for the equipment necessary for connecting to the line, and thus various effects are achieved.

[Brief description of drawings]

1 is a front view showing an embodiment of the present invention, FIG. 2 is a side view of the same, FIG. 3 is a front view of the entire circuit breaker, and FIG. 4 is a plan view.
FIG. 5 is a single line connection diagram showing the connection relationship. 1 ... Tank, 2 ... Circuit breaker main body, 4 ... Bushing type current transformer, 7 ... Disconnector, 8 ... Grounding device, 9 ... Unit, 20 ... Instrument transformer, 21 ... Tank, 22 ... Connection pipe,

Claims (1)

[Scope of utility model registration request] 1. A tank type circuit breaker in which a main body of the circuit breaker is housed in a gas type or vacuum type tank, and a bushing type AC device is installed on the upper portion of the tank. A unit incorporating a disconnector and a grounding device therein is provided coaxially with the bushing type current transformer between the current transformer and the bushing type current transformer, and the unit is connected to the tank and is connected to the inside of the unit. A tank-type circuit breaker in which a tank for accommodating an instrument transformer is connected through a connecting pipe, and the instrument transformer is connected to the disconnector or the grounding device.