JPH079530Y2 - Switchgear - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial field of application" The present invention relates to a switchgear having a main transformer and a drawer type circuit breaker connected to the secondary side of the main transformer in a distribution substation or the like.

"Prior Art" Generally, in a distribution substation of an electric power company or a substation facility of a general consumer, a draw-out breaker may be connected to a secondary side of a main transformer. In this case, in the prior art, a closed switchboard accommodating the busbar and the draw-out circuit breaker is provided near the main transformer, and the main transformer and the closed switchboard are connected by a power cable or a duct.
That is, the main transformer and the switchgear such as a closed switchboard connected to the secondary side of the main transformer are separately configured and are connected to each other by a power cable or a duct.

[Problems to be Solved by the Invention] In the above-mentioned conventional technology, since the main transformer and the switchgear connected to the secondary side of the main transformer are provided separately, the arrangement for arranging them is not provided. Not only the required space is large, but also the price is high.

"Means for Solving the Problem" The present invention is intended to solve the above-mentioned drawbacks of the prior art, and in a main transformer and a pull-out breaker on the secondary side of the main transformer, The box body of the main transformer is divided into a main transformer body room and a circuit breaker room by a partition wall, and the main transformer body room is filled with an insulating gas and connected to the main transformer body and this main transformer. The main circuit conductor connected to the bus bar is hermetically penetrated through the partition wall and the tip portion thereof is led out into the breaker chamber,
A drawer type circuit breaker having a disconnecting section that can be connected to and separated from the main circuit conductor is housed in the circuit breaker chamber.

"Operation" By storing the busbar and the draw-out type circuit breaker in the main transformer box and integrally configuring the main transformer and the switchgear, the gap between the main transformer and the switchgear can be eliminated. ,
Not only can the required space be reduced, but the box body on the switchgear side can also be used as the box body of the main transformer, so that the cost can be reduced.

In addition, since the busbar is housed in the main transformer main body room filled with insulating gas, not only the insulation reliability is improved, but also the drawer type breaker is housed in the air-insulated breaker room. Therefore, at the time of maintenance and inspection of the draw-out type circuit breaker, the work can be easily performed while the bus bar is in operation.

[Embodiment] An embodiment of the present invention will be described below in detail with reference to the drawings.

In the figure, a main transformer box 1 is divided into a main transformer main body chamber 3 and a circuit breaker chamber 4 by a partition wall 2 provided therein. The main transformer main body chamber 3 is filled with an insulating gas 5 such as SF ₆ gas, and a main transformer main body 6 and a bus bar 7 connected to the secondary side of the main transformer main body 6 are provided. It is stored. The main circuit conductor 8 connected to the bus bar 7 penetrates the partition wall 2 and is sealed by an insulating space (not shown), and its tip is led out into the breaker chamber 4.

On the other hand, the circuit breaker chamber 4 has a front door 4a and is air-insulated, and a drawer type circuit breaker 9 is housed inside. This drawer breaker 9 has a breaking portion 10 and a disconnecting portion 11 that can be brought into contact with and separated from the main circuit conductor 8, and also has a wheel.
12 is formed so as to be reciprocally movable in the front door 4a side of the circuit breaker chamber 4, that is, in the left-right direction in the drawing.

Reference numeral 13 denotes a cable head arranged in the box body 1 and connected to the primary side of the main transformer main body 6.

In the device of the present invention, the bus bar 7 is housed in the main transformer main body chamber 3 filled with the insulating gas 5 during normal energization. Insulation reliability is significantly improved compared to the case where it is housed in the device.

When performing maintenance and inspection of the draw-out circuit breaker 9 or responding to an accident,
The breaker 10 of the drawer type breaker 9 is opened. Next, the front door 4a of the breaker chamber 4 is opened and the drawer type breaker 9 is attached to the front door 4a.
When it is pulled out to the side, the disconnecting portion 11 is separated from the tip portion of the main circuit conductor 8. As a result, maintenance / inspection work or accident response work of the draw-out circuit breaker 9 can be performed.

[Advantage of Invention] As described above in detail with the embodiments, according to the present invention,
Since the main transformer and the switchgear, which are conventionally provided separately from each other, can be integrally configured, not only the required space can be greatly reduced, but also the cost can be reduced.

In addition, since the busbar is housed in the main transformer body room filled with insulating gas, not only is the insulation reliability improved, but the drawer type circuit breaker is housed in the air-insulated circuit breaker room. For maintenance and inspection of the draw-out type circuit breaker, the work can be easily performed while the bus bar is in operation.

[Brief description of drawings]

 The drawing is a block diagram showing an embodiment of the present invention. In the figure, 1 is a box body, 2 is a partition wall, 3 is a main transformer main body chamber, 4 is a circuit breaker chamber, 5 is an insulating gas, 6 is a main transformer main body, 7 is a bus bar, 8 is a main circuit conductor, and 9 is a lead-out type breaker. 10 is a disconnecting part and 10 is a disconnecting part.

Claims (1)

[Scope of utility model registration request] 1. In a main transformer and a drawing-type breaker on the secondary side of the main transformer, the box body of the main transformer is divided into a main transformer main chamber and a breaker chamber by a partition wall. , The main transformer main body chamber is filled with an insulating gas and accommodates the main transformer main body and a bus bar connected to the main transformer, and the main circuit conductor connected to the bus bar hermetically penetrates the partition wall. While guiding the tip of the lever into the circuit breaker chamber,
A switchgear, characterized in that a drawer type circuit breaker having a disconnecting section capable of coming into contact with and separating from the main circuit conductor is housed in the circuit breaker chamber.