JPH0865832A - Connecting device of gas-insulated pct unit for power utility - Google Patents

Abstract

PURPOSE: To facilitate operations of assembly and regulation at an installation site and to lessen an installation area by a method wherein a connecting box of a PCT unit and a disconnector box of a disconnector unit are joined by a connecting duct line and mounted on a common frame. CONSTITUTION: A connecting box 12 of a PCT unit 1 and a disconnector box 22 of a disconnector unit 2 are joined by a connecting duct line 40. Since an expansion joint is not used for joining these two boxes, a distance between them is made short and they can be mounted on a common frame 42. when the connecting box 12 and the disconnector box 22 are joined by the connecting duct line 40 and assembled on the common frame 42 in a factory, the two boxes can be joined by a knock pin and an operation of regulation at an installation site other than the one on the common frame 42 is dispensed with. According to the above-stated constitution, the number of days for assembly at the installation site is lessened, the cost of manufacture is reduced and an installation space is reduced sharply.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-insulated power supply / demand PCT unit composed of a transformer for a power supply / demand meter for measuring the amount of power used by a customer, a disconnector unit, and a connection conduit for mounting these. Regarding connection device.

[0002]

2. Description of the Related Art In a gas-insulated switchgear, a transformer for measuring the amount of electric power used by a consumer (hereinafter abbreviated as PCT) is installed. This PCT
Is valid for 15 years according to the Measurement Law, and 1
Electric power company removes and tests every 5 years (update / replacement)
Is done. Therefore, the PCT, the connection box, and the connection conduit for mounting the PCT constitute a PCT unit, and the PCT can be easily removed from the connection box at the time of verification.

Since this PCT unit is used in combination with the disconnector unit for reasons of circuit configuration, the connection box of the PCT unit is also connected to the disconnector unit.

FIG. 2 is a block diagram of a connecting device for a PCT unit in this conventional example, in which single line connections are indicated by broken lines.

In FIG. 2, 1 is a transformer unit (PCT unit) for measuring instruments, and the PCT unit 1 is a pedestal 1
1, a connection box 12 placed and mounted on the connection box 1, the connection box 1
2 and an instrument transformer box (PCT box) 13 formed integrally with each other, each of which has an airtight structure and is filled with an insulating gas, and a connection conductor 14 is provided inside the connection box 12 and a PCT box.
A PCT is arranged in the box 13, and the connecting conductor 14 is a PC.
It is connected to T and its both ends are led out to the left and right outside the connection box 12 via the insulating member 15. 16 is a gas monitoring box,
Reference numeral 17 indicates the floor surface.

Reference numeral 2 is a disconnector unit, and the disconnector unit 2 is mounted on a frame 21 and attached thereto.
2 and the disconnector 2 attached to the disconnector box 22, which will be described later.
4 and an operating device 23 for operating the grounding device 25. A disconnector 24 and a grounding device 25 are arranged in the disconnector box 22, and the connecting conductor 26 is led out of the disconnector box 22 via an insulating member 27. Insulating gas is sealed in the disconnector box 22. 28 shows a gas monitoring box.

3 is a PCT unit 1 and a disconnector unit 2
It is a connection conduit having a connection conductor 31 for connecting with, and has an expansion joint 32 in part, is airtightly formed, and an insulating gas is sealed inside. 33 is an adjustment flange, and the expansion joint 3
It is detachably attached to the flange for 2. 34
Is a double screw bolt for adjusting the length of the expansion joint 32 and the inclination of the flange surface, and 35 is a nut which is removed after the adjustment work is completed.

In consideration of the local installation, the connection box 12 of the PCT unit 1 and the disconnector unit 2 are connected to the connection conduit 3.
In order to facilitate the connection with the disconnector box 22 of, the length and the upper and lower sides using the expansion joint 32 and the adjustment flange 33,
It has a function that allows adjustment in the left and right directions.

[0009]

Since the telescopic joint 32 is used during the installation and assembly work at the installation site, the installation accuracy is slower than that when directly connected by the pipe line, but adjustment work such as horizontal adjustment and centering adjustment is performed. Cannot be omitted. Further, since the expansion joints 32 are used, the distance between the connection box 12 and the disconnector box 22 becomes large, and a large installation area is required.

It is an object of the present invention to provide a PCT unit connecting device which is easy to assemble and adjust at the installation site and has a small installation area.

[0011]

Means for solving the above-mentioned problems in the present invention are common by connecting a connection box of a PCT unit and a disconnector box of a disconnector unit having a grounding device with a connection conduit. It is to be mounted on the pedestal.

[0012]

Since the connection box of the PCT unit and the disconnector box of the disconnector unit having the grounding device are mounted on the same frame, unlike the case where each box is mounted on a separate frame or frame, There is no relative installation error with the frame. Further, since the expansion joint is not used and the pipe is directly connected, the distance between the connection box of the PCT unit and the disconnector box of the disconnector unit can be shortened.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the embodiments shown in the drawings. Note that the same parts as those in FIG.

FIG. 1 is an explanatory view showing an embodiment of the present invention.
(A) is a front view, and (B) is a sectional view of a portion (A). In the figure, 40 is a junction box 1 of the PCT unit 1.
2 is a connection conduit connecting the disconnector box 22 of the disconnector unit 2, 41 is a pressure guiding pipe, and 42 is a common mount. Since the expansion joint 16 shown in FIG. 2 is not used, the distance between the connection box 12 and the disconnector box 22 is shortened and the joint box 42 can be mounted on the common mount 42.

Further, since the connection box 12 and the disconnector box 22 are separated from each other, the gas monitoring boxes 16 and 28 shown in FIG. By guiding the insulating gas sealed inside to the operating device 23 portion, it can be installed side by side with the operating device 23 portion, and the gas can be monitored collectively.

At the factory, the junction box 1 is mounted on the common mount 42.
When 2 and the disconnector box 22 are assembled by connecting with the connecting conduit 40, unlike the case where the connecting box 12 and the disconnector box 22 are separately installed, both can be connected by a knock pin (not shown). , Individual boxes 12 and 2 other than common mount 42
No adjustment work such as horizontal adjustment and centering adjustment is required at the installation site, and the assembly schedule at the installation site can be shortened.

Due to the manufacturing schedule and the like, the common mount 42 is shipped first, and then the connection box 12 and the disconnector box 22 are connected to the conduit 40.
Although some adjustment work is required at the installation site when assembled by assembling with, the mounting bolts 43 of the connection box 12 and the disconnector box 22 and the common mount 42 are enlarged as shown in FIG. 1 (B). It can be easily adjusted with the jack bolt 44 provided.

[0018]

The PCT unit connection device according to the present invention is installed on the common mount unlike the one in which the PCT unit connection box and the disconnector unit disconnector box are separately installed on the floor surface. On-site assembly and adjustment work becomes unnecessary or extremely easy, and gas monitoring of instrument transformer connection boxes with different gas pressures can be monitored at the same time as gas monitoring of the disconnector box in the operation device part of the disconnector.

Further, since the connection box of the PCT unit and the disconnector box of the disconnector unit are mounted on a common base and connected by a short conduit, unlike an expansion joint, an expensive expansion joint or By eliminating the adjustment flange and the like, the manufacturing cost can be significantly reduced, and the size can be reduced, and the installation area can be significantly reduced.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an embodiment of the present invention. (A) is a front view, and (B) is a cross-sectional view of the mounting portion indicated by (A) in FIG.

FIG. 2 is a configuration diagram of a conventional example.

[Explanation of symbols]

 1 ... PCT unit 2 ... Disconnector unit 3 ... Connection conduit 12 ... Connection box 13 ... PCT box 22 ... Disconnector box 23 ... Operating device 24 ... Disconnector 25 ... Grounding conduit 40 ... Connection conduit 42 ... Common mount

Claims (1)

[Claims] 1. A PCT for gas-insulated electric power supply and demand, characterized in that the PCT unit and the disconnector unit are mounted on a common frame, and the connection box of the PCT unit and the disconnector box of the disconnector unit are connected by a connection conduit. Unit connection device.