JPH0879924A - Gas insulated switchgear - Google Patents

Abstract

PURPOSE: To obtain a gas insulated switchgear which can be transported as a unit by disposing a transformer perpendicularly to a bus coupling a power receiving unit and an interrupting unit and coupling the transformer unit with a circuit breaker through an L-shaped branch bus. CONSTITUTION: A lead-in bushing 1, a current transformer 7, and a power receiving circuit breaker 2 constitute a conduction path as a power receiving unit. A ground switch 3 on the primary of circuit breaker is connected between the power receiving unit and the upper bus 11 of a circuit breaker 4. A lower bus passes through the circuit breaker 4 and connected with an L-type enclosure 10 housing a ground switch 5 on the secondary of circuit breaker connected with a transformer 6. With such arrangement, the gas insulated switchgear 14 and the transformer 6 can be confined within a transportation limit dimension L2 . Since the gas insulated switchgear can be transported as a unit except the bushing 1, transportation cost and the labor required for installation at site can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a private-use power receiving and transforming gas insulated switchgear having one line and one bank for general private use.

[0002]

2. Description of the Related Art FIGS. 5, 6 and 7 show the arrangement of a conventional gas-insulated switchgear 14 and a transformer 6, showing a plan view, a front view and a right side view, respectively.

In the conventional gas-insulated switchgear 14, the power receiving unit, the circuit breaker 4, the bus bar, etc. and the transformer 6 exceed the transportable limit dimensions, and therefore, they are individually transported to the installation site for connection work. ing.

[0004]

According to the present invention, since the gas-insulated switchgear 14 and the transformer 6 are assembled and transported integrally, a large width L ₁ requires a large installation area and transportation costs are high. Too much problem arose.

An object of the present invention is to reduce the transportation cost and the number of man-hours in the field and to reduce the installation area to reduce the land cost and the construction cost. To provide.

[0006]

In order to achieve the above object, the present invention has a transformer arranged in a direction perpendicular to a bus connecting the power receiving unit and the circuit breaker unit, and the transformer and the circuit breaker are
It is characterized in that they are connected by an L-shaped branch busbar.

Further, it is characterized in that the installation area is reduced.

[0008]

According to the present invention, since the total outer diameter of the gas-insulated switchgear in which the transformer is assembled and connected is within the transportation limit, it can be transported as a unit.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a single line connection diagram for explaining an embodiment of the present invention, and FIGS. 2, 3 and 4 show the arrangement of the gas-insulated switchgear 14 and the transformer 6, respectively. A plan view, a front view, and a left side view are shown.

The lead-in bushing 1, the current transformer 7, and the power receiving disconnecting switch 2 constitute an energizing path as a power receiving unit, and the circuit breaker primary side grounding switch 3 connected to the power receiving unit is connected to the upper bus bar 11 of the circuit breaker 4. After passing through the circuit breaker 4, the L-shaped container 10 is connected to the lower bus bar 12 of the circuit breaker, the circuit breaker secondary side grounding switch 5 is arranged in the container 10, and the transformer 6 Connected with. By arranging the gas-insulated switchgear 14 and the transformer 6 in this way, the size is within the transportation limit dimension (L ₂ <L ₁ L ₂ is almost half of L ₁ ), and the bushing 1 is separately transported. Integral transportation is possible.

The energization path is the same as in FIG. 1, but the gas insulated switchgear 14 and the transformer 6 are arranged in parallel in FIGS. 2, 3 and 4, whereas in FIGS. In FIG. 7,
Since they are arranged in tandem, they cannot be transported as a unit.

[0013]

As described above, according to the present invention,
A transformer with a certain capacity and a gas-insulated switchgear can be transported together, which can reduce transportation costs and the number of man-hours for installation work on site.

Further, the installation area can be reduced as compared with the conventional structure, and the land cost and construction cost can be reduced.

[Brief description of drawings]

FIG. 1 is a single line connection diagram of a gas insulated switchgear and a transformer according to the present invention.

FIG. 2 is a plan view of a gas insulated switchgear and a transformer arrangement according to the present invention.

FIG. 3 is a front view of a gas-insulated switchgear and a transformer layout according to the present invention.

FIG. 4 is a left side view of the gas insulated switchgear and transformer arrangement according to the present invention.

FIG. 5 is a plan view of a conventional gas insulated switchgear and transformer layout.

FIG. 6 is a front view of a conventional gas-insulated switchgear and transformer layout.

FIG. 7 is a right side view of a conventional gas-insulated switchgear and transformer layout.

[Explanation of symbols]

1 ... Bushing, 2 ... Power receiving disconnecting switch, 3 ... Circuit breaker primary side grounding switch, 4 ... Circuit breaker, 5 ... Circuit breaker secondary side grounding switch, 6 ... Transformer, 7 ... Current transformer, 8 ... Circuit breaker operation cubicle, 9 ... Gas insulation switchgear monitoring cubicle, 10 ...
L-shaped container, 11 ... upper bus bar, 12 ... lower bus bar, 14 ...
Gas insulated switchgear.

Claims (2)

[Claims] 1. A circuit breaker and an operation cubicle are arranged on the front side, and a power receiving unit is provided on the side facing the circuit breaker.
The circuit breaker and the power receiving unit are connected by an upper bus bar, the lower bus bar of the circuit breaker is connected to the transformer by an L-shaped bus bar, and the transformer is provided in a direction perpendicular to the upper bus bar. And gas insulated switchgear. 2. The gas insulated switchgear according to claim 1, wherein the power receiving unit comprises a bushing, a current transformer, and a power receiving disconnector.