CN201393004Y

CN201393004Y - Box type gas insulating metal sealing switch equipment

Info

Publication number: CN201393004Y
Application number: CN200920055071U
Authority: CN
Inventors: 谢德雄; 卢伟东; 郭卫春; 袁伟恒; 李贤伟; 陈满生
Original assignee: Guangzhou Toshiba Baiyun Electrical Equipment Co Ltd
Current assignee: Guangzhou Toshiba Baiyun Electrical Equipment Co Ltd
Priority date: 2009-04-22
Filing date: 2009-04-22
Publication date: 2010-01-27
Anticipated expiration: 2019-04-22

Abstract

The utility model discloses a box type gas insulating metal sealing switch equipment comprising an instrument room, an upper sealing air room and a lower sealing air room; the upper sealing air room is connected with and separated from the lower sealing air room by an air separated insulator; the instrument room is internally provided with a three-station isolating switch and an operation mechanism; the lower sealing air room is internally provided with a breaker and a operation mechanism; the upper sealing air room is provided with a solid insulating bus, a voltage transformer and a ZnO lightning arrester; the voltage transformer and the ZnO lightning arrester are connected with a main bus of the solid insulating bus; and the upper sealing air room and the lower sealing air room are respectively provided with an explosion proof safe film. The upper sealing air room and the lower sealing air room are separated into a bus room and a breaker room which are not affected with each other and have an independent explosion proof safe film, therefore, the voltage transformer and the lightning arrester can still normally work when a breaker switch of the breaker room trips, so as to meet the requirements that the operation of the voltage transformer and the lightning arrester are not affected by switching off and switching on the breaker, and effectively reduce the amount of switch equipment and investment cost.

Description

A kind of box type gas insulating metal enclosed switchgear

Technical field

The utility model relates to a kind of high voltage switchgear, and specifically a kind of comprehensive box type gas insulating metal enclosed switchgear (C-GIS) relates in particular to the switchgear of a kind of bus bar side instrument transformer with voltage and lightning arrester.

Background technology

At present, middle pressure C-GIS commonly used is upper and lower two air chamber structures, and three of high voltage device extremely all is sealed in SF ₆In the air chamber; Upper chamber (bus-bar room) is equipped with tri-station isolating switch, and lower chamber (breaker chamber) is equipped with circuit breaker; Seal case is welded with steel plate is airtight.Can satisfy the requirement of single busbar connection, a main electrical scheme of sectionalized single busbar connection.Voltage transformer and lightning arrester as control and protection usefulness are contained in the outlet cable side, or make a PT cabinet use separately.

There is following weak point in the switch cubicle of this structure:

One, voltage transformer is contained in the outlet cable side, promptly is connected the following terminals of circuit breaker, make killer switch when tripping operation, voltage transformer and lightning arrester power down and ineffective when breaker chamber need overhaul or break down.

Two, voltage transformer and lightning arrester are made a PT cabinet use separately, increased investment, cause waste.

Summary of the invention

In order to overcome the deficiency of above-mentioned technology, the purpose of this utility model is to provide a kind of rational in infrastructure, safe and reliable, easy to use, box type gas insulating metal enclosed switchgear that cost is low.

The technical solution of the utility model is:

A kind of box type gas insulating metal enclosed switchgear, comprise isolated control room, go up close air chamber and following close air chamber, go up between close air chamber and the following close air chamber and connect and separate by the air bound insulator, be provided with the tri-station isolating switch and the operating mechanism that are connected with last close air chamber in the control room, be provided with circuit breaker and the operating mechanism that links to each other with the control room in the close air chamber down, on last close air chamber, be provided with the solid insulation bus, voltage transformer and ZnO arrester, voltage transformer is connected with the main bus bar of ZnO arrester with the solid insulation bus, goes up close air chamber and is respectively equipped with the anti-explosion safety film with following close air chamber.

Further, described voltage transformer is the plug-in voltage transformer, ZnO arrester is respectively the plug-in ZnO arrester, plug-in voltage transformer and plug-in ZnO arrester place the outside of close air chamber, and be connected with main bus bar by plugging coupling, place the air chamber outside, maintain easily and change.

The beneficial effects of the utility model are: owing to connect with the air bound insulator between the upper-lower seal air chamber, and separate and become bus-bar room and the breaker chamber that is independent of each other, has independent anti-explosion safety film, voltage transformer and lightning arrester are in breaker chamber maintenance or break down when making the killer switch tripping operation still can operate as normal, can satisfy the operation of voltage transformer and lightning arrester be not subjected to the circuit breaker branch, close a floodgate influence in, effectively reduce switchgear quantity, reduce cost of investment.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is an internal structure schematic diagram of the present utility model;

Fig. 2 is the schematic appearance of switchgear of the present utility model.

Embodiment

With reference to Fig. 1, Fig. 2, a kind of box type gas insulating metal enclosed switchgear of the present utility model, comprise isolated control room 10, go up close air chamber 20 (bus-bar room) and following close air chamber 30 (breaker chamber), go up between close air chamber 20 and the following close air chamber 30 and connect and separate by air bound insulator 40, be provided with the tri-station isolating switch and the operating mechanism 12 that are connected with last close air chamber 20 in the control room 10, be provided with circuit breaker and the operating mechanism 32 that links to each other with control room 10 in the close air chamber 30 down, on last close air chamber 20, be provided with solid insulation bus 22, voltage transformer 24 and ZnO arrester 26, voltage transformer 24 is connected with the main bus bar of ZnO arrester 26 with solid insulation bus 22, go up close air chamber 20 and be respectively equipped with anti-explosion safety film 28 with following close air chamber 30,38, promptly constitute bus-bar room anti-explosion safety film and breaker chamber anti-explosion safety film, in addition, earth bus 50 is arranged on the bottom of control room 10

Described voltage transformer 24 is the plug-in voltage transformer, and ZnO arrester 26 is respectively the plug-in ZnO arrester, and plug-in voltage transformer and plug-in ZnO arrester place the outside of close air chamber 20, and is connected with main bus bar by plugging coupling.

Described switchgear has following technical characterstic:

One, need maintenance when circuit breaker and operating mechanism 32, and when disconnecting tri-station isolating switch and making it to isolate with main bus bar, voltage transformer 24 is connected with main bus bar by pluggable coupling with ZnO arrester 26, still can operate as normal.

Two, when circuit breaker hindered tripping operation for some reason, the voltage transformer 24 and the ZnO arrester 26 that are connected in bus bar side were unaffected.

Three, described switchgear is equivalent to the combination of contact scheme and metered scheme, can save the PT cabinet in practical engineering application, reduces construction investment.

Four, voltage transformer in the described switchgear and ZnO arrester can be preferably the plug-in connection, place the air chamber outside, maintain easily and change.

Certainly, the invention is not limited to above-mentioned embodiment, and other equivalent also should be within protection range of the present utility model.

Claims

1, a kind of box type gas insulating metal enclosed switchgear, it is characterized in that: comprise isolated control room (10), go up close air chamber (20) and following close air chamber (30), go up between close air chamber (20) and the following close air chamber (30) and connect and separate by air bound insulator (40), be provided with the tri-station isolating switch and the operating mechanism (12) that are connected with last close air chamber (20) in the control room (10), be provided with circuit breaker and the operating mechanism (32) that links to each other with control room (10) in the close air chamber (30) down, on last close air chamber (20), be provided with solid insulation bus (22), voltage transformer (24) and ZnO arrester (26), voltage transformer (24) is connected with the main bus bar of ZnO arrester (26) with solid insulation bus (22), and upward close air chamber (20) and following close air chamber (30) are respectively equipped with anti-explosion safety film (28,38).

2, a kind of box type gas insulating metal enclosed switchgear according to claim 1, it is characterized in that: described voltage transformer (24) is the plug-in voltage transformer, ZnO arrester (26) is respectively the plug-in ZnO arrester, plug-in voltage transformer and plug-in ZnO arrester place the outside of close air chamber (20), and are connected with main bus bar by plugging coupling.