JPS6114254Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to the structure of a closed switchboard.

Generally, a high-voltage closed switchboard consists of a bus room, a disconnection room, and a control room, and many sides are lined up as rows of panels, and the bus room is usually installed by connecting the rows of panels. Even if an accident involving arcing occurs in the busbar room, it is desirable to be able to quickly resume operation without destroying the switchboard.

In conventional closed switchboards, the ladders and breaker chambers are equipped with pressure relief devices in the event of an accident involving large or low arcs, but the busbar room is an elongated sealed chamber that extends through the rows of panels. Therefore, if an arc occurs somewhere on the busbar due to an accident, the arc will move at a very high speed on the busbar from the power supply section in the opposite direction.
When it reaches the end of the bus bar, the wire breaker will rupture at this end, resulting in explosive combustion and there is a risk that the switchboard containing the end of the bus bar will be destroyed.

In order to eliminate the above-mentioned dangers, the purpose of this invention is to provide a highly safe closed switchboard that can quickly resume operation without destroying the switchboard even if an arc occurs on the busbar. .

Next, embodiments of the present invention will be described based on the drawings. Fig. 1 is a front view of a closed switchboard according to an embodiment of the present invention, Fig. 2 is a side view thereof, and Fig. 3 is its A-
It is an A sectional view. Closed switchboard 1 Hashiya disconnect room 1
It consists of 1, a busbar room 12, and a controller room 13, and can be arranged in many rows. A busbar 2 is provided so as to communicate with the busbar chambers of these rows of boards and supported by an insulating support stand 3. The end portions of the bus bar 2 are extended and protruded to both outside sides of the row board, and a bus bar combustion chamber 4 is provided to cover the protruding end portions of the bus bar 2. This combustion chamber 4 has a sealed structure, but is provided with a pressure relief window 5 for releasing internal pressure when it becomes high.

According to the structure of the present invention, in the event that the bus bar 2
Even if an arc occurs somewhere along the line due to an accident, the arc will rapidly move on the bus bar and enter the combustion chamber 4 at either end, where it will remain and burn until the breaker is activated. When the pressure inside the combustion chamber increases due to the combustion gas generated by the arc, the pressure relief window 5 opens and the pressure inside the chamber is released, so that the switchboard is not destroyed. In addition, by actively guiding the arc to the combustion chamber outside the switchboard in this way, the end of the busbar inside the combustion chamber is burnt out due to combustion, but only a small trace remains on the busbar 2 inside the row of panels, and almost no damage occurs. It will not be burned out. Therefore, restoration and repair after an accident can be easily carried out, and operation can be resumed in a short period of time.

According to this invention, by simply installing a simple busbar combustion chamber outside the outermost row of panels in a closed switchboard, even if an arc occurs due to a short circuit accident on the busbar, the damage will be localized and recovery will be possible. Since operation can be restarted within a short time, the safety and reliability of the closed switchboard can be improved.

[Brief explanation of the drawing]

Fig. 1 is a front view of a closed switchboard according to an embodiment of the present invention, Fig. 2 is a side view thereof, and Fig. 3 is its A-A
FIG. 1: Closed switchboard, 11: Shuttle breaker room, 12: Busbar room, 13: Controller room, 2: Busbar, 3: Insulation support stand, 4: Busbar combustion chamber, 5: Pressure relief window.

Claims (1)

[Scope of utility model registration request] In a closed switchboard in which a busbar chamber is provided by communicating a plurality of closed switchboards constituting a row panel to the left and right, both ends of the bus bars in the busbar chamber are extended and protruded on both sides of the row panel, and a pressure relief window is provided. 1. A closed switchboard characterized in that a closed busbar combustion chamber is provided, and the busbar combustion chamber covers both ends of the busbar protruding to both outsides of the row panel.