JPH03222609A - Gas insulated contactor for direct connection to gas insulated transformer - Google Patents

Abstract

PURPOSE:To reduce an installation space for gas insulated contactors forming the primary and secondary wirings of gas insulated transformers by directly connecting the gas insulated contactors to the gas insulated transformers and positioning the gas insulated contactors above the gas insulated transformers. CONSTITUTION:Transformer primary wirings 3 are routed along the upper side of each gas insulated transformer 5, and one end of which is connected to the gas insulated transformer 5 through a connecting bus bar 4 and the opposite end of which is connected to a primary bus bar 9. And the transformer secondary wirings 14 are routed along the lower side of each gas insulated transformer 5, and one end of which is connected to the gas insulated trans former 5 through a connecting bus bar 15 and the opposite end of which is connected to a secondary bus bar 18. Since the primary wiring 3 and the secon dary wiring 14 of the transformer for each phase are routed along the upper and lower sides respectively of the gas insulated transformer for each phase as mentioned above, an installation space for the gas insulated transformer and contactors can greatly be reduced.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention provides a gas insulated switchgear directly connected to a gas insulated transformer, which improves the equipment arrangement of the gas insulated switchgear that constitutes a transformer line. It is related to.

(Prior Art) There is a gas insulated switchgear directly connected to a gas insulated transformer in which the gas insulated switchgear is connected to the primary line and secondary line of a gas insulated transformer. To build this type of equipment in a substation, first install a gas-insulated transformer in a designated location, and install a primary or secondary main bus, disconnectors, circuit breakers, current transformers, and earthing switches on both sides. A transformer primary line and a transformer secondary line consisting of a device assembly of The whole was constructed by connecting them with cables.

(Problems to be Solved by the Invention) By the way, in the gas insulated switchgear and gas insulated transformer arranged in this way, there are problems to be solved as described below. Namely.

First, because the transformer primary line, gas-insulated transformer, and transformer secondary line are located separately, installation space for each piece of equipment is required, and it is also necessary to install a cable connecting the premises. Overall, the installation space was large.

Furthermore, since the gas insulated transformer is a pressure vessel, the tank is cylindrical, and the space near the tank becomes a dead space.

An object of the present invention is to provide a gas insulated switchgear directly connected to a gas insulated transformer, which effectively utilizes the upper space around the gas insulated transformer and reduces the overall space required for installation.

[Structure of the invention]

(Means for Solving the Problems) A gas insulated switchgear directly connected to a gas insulated transformer of the present invention includes:
The gas insulated switchgear constituting the transformer primary circuit and the transformer secondary circuit of the gas insulated transformer has a structure in which it is directly connected to the gas insulated transformer, and is arranged above the gas insulated transformer.

(Function) According to the gas insulated switchgear directly connected to a gas insulated transformer of the present invention, it is possible to eliminate the need for a cable terminal connection section for connecting a gas insulated transformer and a transformer line, as well as a premises communication cable. The cable installation space within the facility can be reduced. Further, the installation space for the gas insulated switchgear and the gas insulated transformer that constitute the transformer line can be significantly reduced, and the space near the gas insulated transformer can be used effectively.

(Embodiment) The present invention will be described below with reference to an embodiment shown in FIGS. 1 to 5. The gas-insulated switchgear directly connected to a gas-insulated transformer according to the present invention directly connects the special three-phase gas-insulated transformer 5 of Oudai to the transformer primary line 3 and the transformer secondary line 14, which are constituted by the gas-insulated switchgear. It consists of

The gas insulated transformer 5 has a cylindrical shape and is installed at a predetermined position in the substation. The transformer primary line 3 includes a disconnector 1, a circuit breaker 2, a current transformer 6A, as shown in the single line diagram in FIG.
6B, a work earthing switch 7, and an earthing switch 8, which are connected in series, and these devices are directly connected to each other to form a gas-insulated switchgear.

The transformer primary line 3 configured in this manner is arranged along the upper side of each gas insulated transformer 5 in FIG. 1 and along the right side in FIG. and the opposite end is connected to the primary side bus bar 9.

Further, the transformer secondary line 14 is connected to the disconnector 11. It consists of a series circuit of a circuit breaker 12, a current transformer 13, a work grounding switch 16, and a grounding switch 17, and these devices are directly connected to each other to constitute a gas-insulated switchgear similar to the primary side. The transformer secondary line 14 is connected to the first
It is arranged along the lower side in the figure and along the left side in FIG.

In the gas-insulated transformer-directly connected gas-insulated switchgear of the present invention arranged in this way, the transformer primary line 3 and the transformer secondary line 14 are arranged one phase above the gas-insulated transformer 5 of each phase. Therefore, the installation space for the gas-insulated transformer and the gas-insulated switchgear is significantly reduced compared to the case where the transformer primary circuit 3 and the transformer secondary circuit [14] are arranged individually. The upper space near the container can be used effectively. Moreover, there is no need for intra-premises communication cables.

As another example, for a three-phase circular gas insulated transformer, the three-phase finger type gas insulated switchgear transformer primary line and the transformer secondary line may be similarly arranged above the gas insulated transformer. As a result, the total equipment installation space can be reduced, and the upper space near the gas insulated transformer can be used effectively.

〔Effect of the invention〕

As described above, according to the present invention, the gas insulated switchgear constituting the transformer line is directly connected to the gas insulated transformer, and by placing it above the gas insulated transformer, the gas insulated switchgear and the gas insulated The installation space for the transformer is significantly reduced, and the space near the gas-insulated transformer can be used effectively. Further, the on-premises communication cable and the cable terminal connection part that connect the gas insulated transformer and the gas insulated switchgear are no longer necessary, and the cable installation space can be reduced.

[Brief explanation of drawings]

1@ is a plan view showing an embodiment of the gas insulated switchgear directly connected to a gas insulator of the present invention, FIG. 2 is a side view taken along the line ■-■ in FIG. 1, and FIGS. 3 and 4. are side views of the right side and left side of FIG. 2, respectively, and FIG. 5 is a single line diagram showing a gas insulated switchgear directly connected to a gas insulated transformer according to the present invention. 1... Disconnector 2... Breaker 3...
Transformer primary line 4...Connection busbar 5...Gas insulated transformer 6A, 6B...Current transformer 7...Working earth switch 8...Earth switch 9...Primary side bus bar 10... Primary side main bus 11... Disconnector 12... Circuit breaker 13... Current transformer
14... Transformer secondary line 15... Connection bus bar 16... Work earth switch 17...
・Earthing switch 18...Secondary side bus bar (873
3) Agent: Yoshiaki Inomata, patent attorney (and one other person)
Figure Figure Figure Figure

Claims (1)

[Claims] In a gas insulated switchgear connected to a gas insulated transformer, the gas insulated switchgear constituting the transformer primary circuit and the transformer secondary circuit of the gas insulated transformer has a structure in which it is directly connected to the gas insulated transformer, and the gas A gas insulated switchgear directly connected to a gas insulated transformer, characterized in that it is placed above an insulated transformer.