JPH0638319A - 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 unit 1a or 1b, a circuit breaker unit 2a or 2b, a disconnector unit 3a or 3b, a transformer side cable head, an earth system (ES), and a pair of disconnectors (DC), and a transformer side cable head unit 104c comprising a transformer side cable head, a disconnector (DS), and a pair of earth system (ES) and connected with the pair of unit groups.

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 at a distribution substation for receiving and distributing 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, a cable head (CH)
And lightning arrester (LA), disconnector (DS) and grounding device (ES)
And the power receiving cable head units 1a and 1b, and the circuit breaker (CB) and the two grounding devices (ES) form the circuit breaker units 2a and 2b. In addition, disconnector (D
S) only the disconnector units 3a, 3b, 4a, 4b, 7
a, 7b are configured, and the cable head (CH) and the grounding device (ES) configure the transformer-side cable head units 6a, 6b, 6c on the load side. In addition, the grounding disconnecting unit 8 is composed of the grounding device (ES) and the disconnecting switch (DS).
Is configured. In addition, 5a and 5b are pipelines.

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

In such a gas-insulated switchgear, one of the circuit breakers (CB) in the circuit breaker units 2a, 2b is turned on so that the power receiving cable head unit 1a,
Power is received through one of the cable heads (CH) in 1b, and the transformer side cable head units 6a, 6b, 6c
Electric power is sent from a cable head (CH) inside to a load through a transformer (not shown).

One of the power receiving cable heads 1a and 1b is for the main line, and the other is for the auxiliary line used when an accident occurs in the main line.

[0007]

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.

[0009]

A structure of the present invention for achieving the above object is to provide a power receiving cable head unit,
A circuit breaker unit connected to the power receiving cable head unit, a disconnector unit connected to the circuit breaker unit, a transformer-side cable head connected to the disconnector unit, a grounding device, and a pair of disconnectors. Providing a pair of four units consisting of the transformer-side cable head,
A transformer-side cable head unit for a middle bank, which is connected to each transformer-side cable head unit and includes a transformer-side cable head, a disconnector, and a pair of grounding devices, is provided.

[0010]

[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 it is possible to collectively transport from the factory to the site.

[0011]

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, conventional disconnector unit 4a,
7a, conduit 5a, and transformer-side cable head unit 6a
In the present invention, is integrated into a single transformer-side cable head unit 104a, and the cable head (CH), the grounding device (ES), and the two disconnecting switches (DS) are combined as shown in FIG. 2 (a). It is housed in the tank. Further, the conventional disconnector units 4b and 7b, the conduit 5b, and the transformer-side cable head unit 6b are also integrated as a single transformer-side cable head unit 104b, and the same type of device is accommodated in one tank. To be done. In addition, the conventional ground disconnecting unit 8 and the transformer-side cable head unit 6c are combined into a single transformer-side cable head unit 104c, and the cable head (C
H), the disconnecting switch (DS), and the two grounding devices (ES) are housed in one tank as shown in FIG. 2 (a).

As shown in FIGS. 2 (a) and 2 (b), a number of tanks corresponding to each unit is provided and each tank is connected. Each tank is indicated by the number of each unit.

Next, the operation of such a gas insulated switchgear will be described. As can be seen by comparing FIG. 1 with FIG. 3, the number of units is reduced from 16 in the conventional case to 9. 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. Moreover, 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.

[0015]

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 relates to the arrangement of a gas insulated switchgear according to the present invention,
2A is a plan view and FIG. 2B is a front view.

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

FIG. 4 is a view showing the arrangement of a conventional gas-insulated switchgear.
4A is a plan view and FIG. 4B is a front view.

[Explanation of symbols]

1a, 1b ... Power receiving cable head unit 2a, 2b ... Circuit breaker unit 3a, 3b ... Disconnector unit 104a, 104b, 104c ... Transformer side cable head unit

Claims (1)

[Claims] 1. A power receiving cable head unit, a circuit breaker unit connected to the power receiving cable head unit, a disconnector unit connected to the circuit breaker unit, and a transformer-side cable head connected to the disconnector unit. A pair of four units including a transformer-side cable head unit composed of a grounding device and a pair of disconnectors is provided, and each unit is connected to each transformer-side cable head unit and also has a transformer-side cable head and a disconnector. A gas-insulated switchgear comprising a transformer-side cable head unit for a middle bank, which is composed of a pair of grounding devices.