HRP920343A2

HRP920343A2 - Gas-insulated metal-clad swichgear installation - has plug connection to feedthrough leading to pivot of lever which moves contact reversibly between bus-bar and earthing point

Info

Publication number: HRP920343A2
Application number: HR920343A
Authority: HR
Inventors: Rolf Dirks; Horst Deharde; Wolfgang Pehlken
Original assignee: Felten & Guilleaume Energie
Priority date: 1989-10-07
Filing date: 1992-09-15
Publication date: 1994-10-31
Also published as: SI9011846A; HRP920343B1

Description

Područje tehnike u koju spada izum The technical field to which the invention belongs

Izum spada u područje razvođenja električne energije, a posebno se odnosi na rasklopne uređaje u kojima su prekidači smješteni u jednom kućištu. Oznaka prema Međunarodnoj klasifikaciji izuma: H 02 B 13/02 i H 01 H 9/36. The invention belongs to the field of distribution of electrical energy, and especially relates to switchgear in which the switches are located in one housing. Designation according to the International Classification of Inventions: H 02 B 13/02 and H 01 H 9/36.

Tehnički problem Technical problem

Tehnički problem koji se rješava izumom sastoji se u sljedećem: kako ostvariti rasklopni uređaj koji će imati manji broj sastavnih dijelova i smanjenu konstruktivnu širinu? The technical problem that is solved by the invention consists in the following: how to realize a switchgear that will have a smaller number of components and a reduced structural width?

Stanje tehnike State of the art

U srednjenaponskim razvodnim mrežama se skoro isključivo primjenjuju izolacijski prekidači. Takozvana prstenasta mreža omogućava primjenu velikog broja izolacijskih prekidača u stanicama u mreži. Zbog nedovoljnog i skupog prostora u gradovima, prvobitno su ovi izolacijski prekidači koncipirani sa sve većom primjenom izolacijskih materijala. Kod krajnje nepovoljne klime u stanicama u mreži, s velikim oscilacijama temperature, velikom vlažnošću zraka i uslijed toga čestog rošenja, javljaju se kod ovih izolacijskih prekidača poteškoće koje se mogu otkloniti samo nekim dodatnim mjerama. Zbog toga odgovara željama korisnika ne samo da se ovi uređaji smanje, već i da se učine pouzdanim. Umjesto izolacijskog materijala koristi se SF6, a brtveni oklop osigurava nepromjenjivu količinu i kvalitetu izolacijskog plina. Isolation switches are almost exclusively used in medium voltage distribution networks. The so-called ring network enables the use of a large number of isolation switches in cells in the network. Due to insufficient and expensive space in cities, initially these isolation switches were designed with increasing application of insulating materials. In an extremely unfavorable climate in the cells in the network, with large temperature fluctuations, high air humidity and, as a result, frequent precipitation, difficulties arise with these isolation switches that can only be eliminated by some additional measures. Therefore, it meets the wishes of users not only to make these devices smaller, but also to make them more reliable. Instead of the insulating material, SF6 is used, and the sealing armor ensures an unchanging quantity and quality of the insulating gas.

Jedan rasklopni uređaj, sa svojstvima prema uvodnom dijelu patentnog zahtjeva 1, poznat je iz DE-OS 27 29 571. Kod njega su pojedinačni izolacijski prekidači smješteni u metalna kućišta. Svaki od izolacijskih prekidača ima jedan pomični kontakt, načinjen u vidu kontaktne nožice, zatim jednu napravu za gašenje luka i jedan poseban prekidač za uzemljenje. Naprava za gašenje luka sastoji se od plinsko nepropusne, i na tlak otporne, oklopljene komore za gašenje, koja je, poželjno, ispunjena plinom pod tlakom. Sabirnice za dovod električne energije ugrađene su u ormar za sabirnice odvojen od metalnih kućišta. To čini neophodnim postavljanje posebnih brtvila između svakog od metalnih kućišta i ormara sa sabirnicama. One switching device, with properties according to the preamble of patent claim 1, is known from DE-OS 27 29 571. In it, individual isolating switches are placed in metal housings. Each of the isolation switches has one movable contact, made in the form of a contact leg, then one device for extinguishing the arc and one special grounding switch. The arc extinguishing device consists of a gas-tight, pressure-resistant, armored extinguishing chamber, which is preferably filled with gas under pressure. The busbars for the power supply are installed in a busbar cabinet separated from the metal housings. This makes it necessary to install special seals between each of the metal housings and busbar cabinets.

Opis rješenja tehničkog problema Description of the solution to the technical problem

Izum ima zadatak da se broj dijelova jednog rasklopnog uređaja opisane vrste smanji, i da se ti dijelovi tako rasporede, da se dobije jedan smanjeni rasklopni uređaj male konstruktivne širine. The purpose of the invention is to reduce the number of parts of a switchgear of the described type, and to arrange these parts in such a way as to obtain a reduced switchgear with a small constructive width.

Ovaj je zadatak riješen, prema izumu, kombinacijom konstrukcijskih svojstava navedenom u naznačujućem dijelu zahtjeva. This task is solved, according to the invention, by the combination of structural properties specified in the indicative part of the claim.

Prednosti postignute izumom sastoje se u tome, što male dimenzije konstrukcije rasklopnog uređaja omogućuju ugradnju u posebno skučenim uvjetima, što je izrada rasklopnog uređaja jeftina i posebno što zahtijeva minimalno održavanje. The advantages achieved by the invention consist in the fact that the small dimensions of the construction of the switchgear enable installation in particularly cramped conditions, that the manufacture of the switchgear is cheap and especially that it requires minimal maintenance.

Ovome posebno doprinosi to, što je sabirnica postavljena u rezervoar s plinom. Također i kutni utikač sa svojim kablovskim priključkom doprinosi da se raspoloživi tijesan prostor može osmišljeno iskoristiti. This is especially helped by the fact that the bus is placed in the gas tank. Also, the corner plug with its cable connection contributes to the fact that the available tight space can be used in a creative way.

Preporučljiva izvođenja i daljnji razvoj predmeta iz zahtjeva 1 dobivaju se iz podzahtjeva. Recommended implementations and further development of the subject from requirement 1 are obtained from the sub-requirements.

Pogodno je da se pomični kontakti mogu istodobno koristiti za napravu za uzemljenje, tako da se time izostavlja posebna veza između izolacijskog prekidača i naprave za uzemljenje (zahtjev 3). Conveniently, the movable contacts can be used simultaneously for the earthing device, so that a separate connection between the isolating switch and the earthing device is omitted (requirement 3).

Ugradnjom limova za hlađenje u napravi za gašenje luka, ista se može smanjiti (zahtjev 4). A pored toga je i izrada naprave za gašenje luka srazmjerno jednostavna. By installing cooling sheets in the arc extinguishing device, it can be reduced (requirement 4). And besides, making a device for extinguishing the arc is relatively simple.

Jedan primjer izvođenja izuma prikazan je na crtežu i bit će detaljnije objašnjen. Jedina slika prikazuje pogled sa strane na uzdužni presjek jednog oklopljenog rasklopnog uređaja ispunjenog izolacijskim plinom i s natikačem. One example of the implementation of the invention is shown in the drawing and will be explained in more detail. The single image shows a side view of a longitudinal section of a shielded switchgear filled with insulating gas and with a slip-on.

U rezervoaru 1 s plinom ugrađeno je više izolacijskih prekidača koji su međusobno jednaki. Zbog toga se prikaz i opis ograničavaju na jedan jedini izolacijski prekidač. Pri tome se izolacijski prekidač sastoji od nepokretnog kontakta 2, pokretnog kontakta 3 i kontakta 4 za uzemljenje. Nepokretni kontakt 2 pričvršćen je na sabirnicu 10. Pomični kontakt 3 je zajedno s polugom 6 uležišten u okretnoj točki 5, koja je postavljena na kraju provodnika 15 koji prolazi kroz zid oklopa. Pomični kontakt 3 je izveden tako da dolazi u dodir obostrano s nepokretnim kontaktom 2 i kontaktom 4 za uzemljenje. Poluga 6 je preko spojne poluge 7 povezana s polugom 9 razvodnog vratila 8. Sabirnica 10 se oslanja na nosače 13 koji su pomoću držača 14 pričvršćeni na zadnji zid rezervoara 1 za plin. Na taj način je sabirnica 10 postavljena paralelno objema uzdužnim stranama, a na njoj je u neposrednoj blizini nepokretnog kontakta 2 postavljena naprava 11 za gašenje luka. Naprava 11 za gašenje luka sastoji se od dva zida između kojih je stepenasto postavljeno više limova 12 za hlađenje. Na provodnik 15 postavljen je kutni natikač 16, zatvoren kabelskom glavom 19. Unutar kutnog natikača 16 nalazi se kontakt 17 koji zahvaća u odgovarajuću čahuru u provodniku 15. Kabelska papučica 18 obuhvaća provodnik iz kabelske glave 19 i ostvaruje vezu s kontaktom 17. Navrtka 20 služi za osiguranje veze između kabelske papučice 18 i kontakta 17. Pristup navrtki je osiguran kroz otvor 21 u kutnom natikaču 16, a koji se može zatvoriti poklopcem 22. In tank 1 with gas, several isolation switches are installed that are equal to each other. For this reason, the presentation and description are limited to a single isolating switch. The isolating switch consists of a stationary contact 2, a movable contact 3 and a grounding contact 4. The stationary contact 2 is attached to the busbar 10. The movable contact 3, together with the lever 6, is placed in the pivot point 5, which is placed at the end of the conductor 15 that passes through the wall of the armor. Movable contact 3 is designed so that it comes into contact on both sides with stationary contact 2 and contact 4 for grounding. The lever 6 is connected to the lever 9 of the distribution shaft 8 through the connecting lever 7. The bus 10 rests on the supports 13 which are attached to the rear wall of the gas tank 1 by means of the holder 14. In this way, the busbar 10 is placed parallel to both longitudinal sides, and on it, in the immediate vicinity of the stationary contact 2, a device 11 for extinguishing the arc is placed. The device 11 for extinguishing the arc consists of two walls between which several sheets 12 for cooling are placed in a staggered manner. An angle plug 16 is placed on the conductor 15, closed with a cable head 19. Inside the angle plug 16 there is a contact 17 that engages in the corresponding bushing in the conductor 15. The cable lug 18 includes the conductor from the cable head 19 and makes a connection with the contact 17. The nut 20 serves to ensure the connection between the cable lug 18 and the contact 17. Access to the nuts is provided through the opening 21 in the corner slipper 16, which can be closed with the cover 22.

Claims

1. Shielded switchgear filled with insulating gas with push-on, with tank 1 filled with SF6 gas, with at least one fixed contact (2) and one movable contact (3), with a device (11) for extinguishing the arc, with a busbar (10) and equal with a conductor (15) through the wall for the slipper, for each of the poles of the switch, indicated by the fact that the fixed contact (2), together with the device (11) for extinguishing the arc is attached to the bus (10) placed in the tank (1) for gas, which rests on the supports (13) parallel to the front side of the gas tank (1), and that the movable contact (3) is made in the form of a leaf, or blade, in mutual contact with the stationary contact (2) and contact (4) for grounding ( double blade), that the pivot point (5) of the movable contact (3) is connected to the conductor (15) on the front side of the tank (1) for gas, and that the conductor (15) is closed on the outside by an angle slip (16) in which there is a cable (19).

2. Switching device according to claim 1, characterized in that the movable contact (3) is rigidly connected to the lever (6), and that the movable contact (3) and the lever (6) have a common pivot point (5), whereby the free the end of the lever is hinged to the connecting lever (7), which is connected to the distribution shaft (8) via the next lever (9).

3. Switching device according to claim 1 or 2, characterized in that the movable contact (3) can be moved from the on position and the earthing position to the off position.

4. Switchgear according to one of claims 1 to 3, characterized in that the device (11) for extinguishing the arc consists of two parallel walls connected to each other, between which the sheets (12) for cooling are installed in steps.

5. Switching device according to one of the claims from 1 to 4, characterized in that the corner plug (16) has a contact pin (17), which is connected to the cable lug (18) of the discharge cable (19), whereby the nuts (20) ) for attaching the cable lug (18) is accessed through an opening (21) that can be closed from the outside with a cover (22).