JPH0638320A - Gas insulated switchgear - Google Patents

Abstract

PURPOSE:To provide a gas insulated switchgear which can be installed in a limited space, transported en block, and manufactured at low cost. CONSTITUTION:The gas insulated switchgear comprises a pair of unit groups, each comprising a power receiving cable head 1a or 1b, a circuit breaker unit 2a or 2b, a ground disconnector 103a or 103b a ground disconnector unit 106a or 106b, and an interruption unit 9a or 9b, wherein the ground disconnector units 103a, 103b are connected each other through a ground disconnector unit 110a while the ground disconnector units 106a, 106b are connected each other through a ground disconnector unit 110b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-insulated switchgear, which has a reduced number of tanks and the like.

[0002]

2. Description of the Related Art A gas-insulated switchgear is provided in a power distribution substation for receiving and arranging power. A wiring diagram of a conventional gas-insulated switchgear in which the devices in the gas-insulated switchgear are unitized and connected is shown in FIG. 3, and a layout of tanks and the like accommodating the devices in each unit is shown in FIG. This gas-insulated switchgear is of a three-phase collective pipe type, and the pipe arrangement is a composite type and a reduced type.

As shown in FIG. 3, the cable head (C
H), the grounding device (ES), and the disconnecting device (DS) constitute power receiving cable head units 1a and 1b, and the circuit breaker (CB) and the two grounding devices (ES) form circuit breaker units 2a and 2b. 9a and 9b are configured. Further, the disconnector unit (DS) alone is used as the disconnector unit 3a, 3b, 4a, 4
b, 7a, 7b, 8a, 8b, 11a, 11b are configured, and the grounding device units 5a, 5 are composed of only the grounding device (ES).
b, 6a, 6b are configured, and the disconnecting switch (DS) and the grounding device (ES) configure the grounding disconnecting units 10a, 10b. Here, PCT is a voltage-current transformer and Tr is a transformer.

The above-mentioned devices are housed in one tank for each unit and arranged as shown in FIG. Figure 4
Indicates the number of each unit as it is as the tank number.

[0005]

However, since the number of units is large, the number of tanks and pipes for accommodating the equipment is large, which not only requires a large installation space for the gas-insulated switchgear but also increases the cost. .

Therefore, an object of the present invention is to provide a gas-insulated switchgear which solves the above problems.

[0007]

The structure of the present invention for achieving such an object is to provide a power receiving cable head unit, a circuit breaker unit connected to the power receiving cable head unit, and a series connection to the circuit breaker unit. A pair of grounding disconnecting units consisting of a grounding device and a pair of disconnecting devices, and a disconnecting unit connected to the grounding disconnecting unit and consisting of a circuit breaker and a pair of grounding devices to form a unit group. It is characterized in that two sets of grounding disconnecting units in both unit groups are connected by a grounding disconnecting unit consisting of a grounding device and a pair of disconnectors.

[0008]

[Operation] Since the devices in a plurality of units are collectively operated as one unit, the number of units is remarkably smaller than the conventional one, and the number of tanks provided for each unit is also reduced. . Therefore, the gas-insulated switchgear can be installed even in a small installation space, and the gas-insulated switchgear can be collectively transported from the factory to the site.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings. Since the present embodiment is an improvement of a part of the conventional gas-insulated switchgear, the same parts as those of the prior art are designated by the same reference numerals, and the description thereof will be omitted. Only different parts will be described.

A wiring diagram of the gas insulated switchgear according to the present invention is shown in FIG. 1, and a layout diagram is shown in FIG. As can be seen by comparing FIG. 1 with FIG. 3, the conventional disconnector unit 3
In the present invention, the a, 4a and the grounding device unit 5a are combined into a single grounding disconnecting unit 103a, and the grounding device (E
S) and two disconnectors (DS) are housed in one tank as shown in FIG. Further, the conventional disconnector units 3b and 4b and the grounding device unit 5b are similarly combined into a grounding disconnecting unit 103b. Then, the grounding device unit 6a and the disconnector units 7a, 8a
Are integrated in the ground disconnecting unit 106a, and the grounding device (ES) and the two disconnectors (DS) are housed in one tank as shown in FIG. Similarly, the grounding device unit 6b and the disconnector units 7b and 8b are combined into a grounding disconnecting unit 106b. In addition, the conventional grounding disconnecting unit 10a and disconnecting unit 11a are combined into a grounding disconnecting unit 110a, and a grounding device (ES) is provided.
And two disconnectors (DS) are housed in one tank as shown in FIG. Similarly, ground disconnecting unit 1
0b and disconnecting unit 11b are ground disconnecting unit 110
b.

As shown in FIG. 2, a number of tanks corresponding to each unit are provided and each tank is connected. Each tank is indicated by the number of each unit.

Next, the operation of the gas insulated switchgear will be described. As can be seen by comparing FIG. 1 with FIG. 3, the number of units is reduced from 22 in the prior art to 12. Since the number of units is reduced, the number of tanks can be smaller than in the conventional case as shown in FIG. 2, and the gas-insulated switchgear can be installed even in a small space. Further, since the number of tanks is small, it is possible to collectively transport the gas-insulated switchgear from the factory to the site, and the work on site can be reduced.

[0013]

As can be seen from the above description, according to the gas-insulated switchgear according to the present invention, since a plurality of units are integrated into one unit, the number of tanks constituting the unit can be reduced and the gas-insulated The installation space for the switchgear can be made smaller than before. Further, since the number of tanks is small, the gas-insulated switchgear can be collectively transported to the site, the installation time of the gas-insulated switchgear at the site can be shortened, and the cost of the gas-insulated switchgear can be reduced. .

[Brief description of drawings]

FIG. 1 is a connection diagram showing an embodiment of a gas insulated switchgear according to the present invention.

FIG. 2 is a plan view showing an embodiment of a gas insulated switchgear according to the present invention.

FIG. 3 is a connection diagram of a conventional gas-insulated switchgear.

FIG. 4 is a plan view of a conventional gas-insulated switchgear.

[Explanation of symbols]

1a, 1b ... Power receiving cable head unit 2a, 2b, 9a, 9b ... Circuit breaker unit 103a, 103b, 106a, 106b, 110a,
110b ... Ground disconnecting unit

Claims (1)

[Claims] 1. A power receiving cable head unit, a circuit breaker unit connected to the power receiving cable head unit, and a pair of grounding disconnecting units connected in series to the circuit breaker unit and including a grounding device and a pair of disconnecting switches. , A unit group is composed of a circuit breaker connected to the grounding disconnecting unit and a pair of grounding devices, and a pair of this unit group is provided, and two grounding disconnecting units in both unit groups are grounded. A gas-insulated switchgear characterized by being connected by a grounding disconnecting unit comprising a device and a pair of disconnectors.