DK154377B

DK154377B - COMPACT SWITCH

Info

Publication number: DK154377B
Application number: DK186084A
Authority: DK
Inventors: Ingar Moen; Sverre Kaste; Wilhelm Rondeel; Sten Thygesen; Torstein Dalen; Nils Landsverk
Original assignee: Norsk Elektrisk & Brown Boveri
Priority date: 1983-04-12
Filing date: 1984-04-11
Publication date: 1988-11-07
Also published as: SE8401972L; DE3413219A1; DK186084D0; DK186084A; NO152528B; NO831290L; NL8401156A; DK154377C; NO152528C; SE8401972D0; SE455357B

Description

DK 154377 BDK 154377 B

Den foreliggende opfindelse angår et kompaktbryderanlæg med sikringer, som har meldeknapper, der kan påvirke bryderanlæggets udløsermekanisme.The present invention relates to a compact circuit breaker system with fuses which have alarm buttons which can actuate the trigger mechanism of the circuit breaker system.

Gasisolerede kompaktbryderanlæg anvendes for spændinger op til 36 kV, og bryderanlæggene har mekanismer til udløsning af en transformatorbryder efter sikringsbrud.Gas-insulated compact circuit breakers are used for voltages up to 36 kV, and the circuit breakers have mechanisms for tripping a transformer circuit breaker after fuse failure.

Sædvanligvis placeres udløsermekanismen i forsiden af bryderanlægget, og sikringerne, som har meldeknapper, er anbragt således, at meldeknapperne også vender mod forsiden. Udløserarmen vil da spærre for sikringen ved skift af denne.Usually, the release mechanism is placed in the front of the switch system, and the fuses, which have alarm buttons, are arranged so that the alarm buttons also face the front. The release arm will then block the fuse when changing it.

En sådan placering medfører, at krybestrømme har kort vej til jord via overføringsleddene i mekanismen, og detskaber problemer, når sikringen skal skiftes.Such a location means that creep currents have a short path to earth via the transfer joints in the mechanism, and this creates problems when the fuse has to be replaced.

En anden ulempe er, at sikringshuset bliver vanskeligere at holde tæt med deraf følgende gaslækager og nedsat isolation. Årsagen til dette er, at mekanismen ofte er ført gennem bryderanlæggets låg. Hertil kommer den ulempe, at eventuelle tætninger omkring mekanismens overføringsled kan resultere i utilsigtet udløsning af udløsermekanismen på grund af trykforskelle, som opstår ved temperatursvingninger.Another disadvantage is that the fuse housing becomes more difficult to keep tight with consequent gas leaks and reduced insulation. The reason for this is that the mechanism is often passed through the lid of the circuit breaker. In addition, the disadvantage is that any seals around the transfer link of the mechanism can result in unintentional release of the release mechanism due to pressure differences which occur during temperature fluctuations.

Formålet med den foreliggende opfindelse er i første række at ophæve de ovennævnte ulemper ved at tilvejebringe et kompaktbryderanlæg, hvor krybestrømmenes vej til jord bliver længere, og gaslækager undgås. Desuden skal det være enklere at skifte sikringer.The object of the present invention is primarily to obviate the above-mentioned disadvantages of providing a compact circuit breaker system where the path of the creeping currents to ground becomes longer and gas leaks are avoided. In addition, it must be easier to change fuses.

X henhold til opfindelsen opnås dette ved, at der i bunden af hvert sikringshus er lejret en bevægelig udløserarm, som er indrettet til at påvirkes af sikringens meldeknap, når sikringen udløser, og har forbindelse med udløsermekanismen gennem et isolerende rør, idet sikringen er anbragt med meldeknappen vendende ind i sikringshusets bageste del. Den bageste del af 2According to the invention, this is achieved in that a movable release arm is mounted at the bottom of each fuse housing, which is arranged to be actuated by the fuse notification button when the fuse trips, and is connected to the release mechanism through an insulating tube, the fuse being arranged with the call button facing into the rear of the fuse housing. The rear part of 2

DK 154377 BDK 154377 B

sikringshuset er fortrinsvis fremstillet af. ledende materiale, og rrekanisnen bliver dermed beliggende i et potentialfrit rum uden fare for krybe-strømme'og udladninger. Potentialforskellen optages i det omkringliggende gasrum, idet der sædvanligvis benyttes SF6-gas som isolation mod jord og mellem faser.the fuse housing is preferably made of. conductive material, and the tube can thus be located in a potential-free space without danger of creeping currents and discharges. The potential difference is absorbed in the surrounding gas space, as SF6 gas is usually used as insulation against earth and between phases.

Forbindelsen mellem udløserarm eller håndtag er ført frem til udløsermekanismen i et rør gennem gasrummet og frem til forsiden af bryderanlægget, hvilket giver så lang vej for krybestrøm-mene, at disse ikke skaber nogen problemer.The connection between the release arm or handle is led to the release mechanism in a pipe through the gas space and to the front of the switching system, which gives such a long way for the creep currents that these do not create any problems.

Tætning mod luft er desuden mindre problematisk, eftersom ingen dele af mekanismen behøver at frigøres, når der er behov for at skifte sikringer. Overføringen fra udløserarmen til udløsermekanismen kan i en enkel form være et wiretræk, men i princippet kan hydraulisk overføring med isolerende væske eller pneumatisk overføring benyttes fra sikringshuset til udløsermekanismen.Sealing against air is also less problematic, as no parts of the mechanism need to be released when fuses need to be replaced. The transfer from the release arm to the release mechanism can in a simple form be a wire pull, but in principle hydraulic transfer with insulating fluid or pneumatic transfer can be used from the fuse housing to the release mechanism.

Opfindelsen vil i detfølgende blive nærmere forklaret i forbindelse med en udførelsesform og under henvisning til tegningen, hvor fig. 1 viser et kompaktbryderanlæg set fra siden og delvist i snit, og fig. 2 et snit gennem den del af et sikringshus med sikring, som vender bort fra bryderanlæggets forside.The invention will be explained in more detail below in connection with an embodiment and with reference to the drawing, in which fig. 1 shows a compact circuit breaker system seen from the side and partly in section, and fig. 2 is a section through the part of a fuse housing with fuse which faces away from the front of the circuit breaker.

Hovedkomponenterne, som udgør kompaktbryderanlægget i fig.The main components that make up the compact circuit breaker system in fig.

1, er et lastbryderkammer 1, en udløsermekanisme 2, og tre sikringshuse, som indeholder sikringer. Fra den bageste del af hvert sikringshus fører et rør 4 til overføring af bevægelsen af en udløserarm i den bageste del 5 af hvert sikringshus 3. Overføringen kan f.eks. være et wiretræk, der påvirker en betjeningsdel 6 for udløsermekanismen 2, som sørger for, at strømmen afbrydes, når en sikring går. Den bageste del 5 er af ledende materiale og har en kontakt 7 til den ene endekontakt 8 på en sikring 9. Sikringen har en meldeknap 10,1, is a circuit breaker chamber 1, a release mechanism 2, and three fuse housings which contain fuses. From the rear part of each fuse housing a tube 4 leads to the transmission of the movement of a release arm in the rear part 5 of each fuse housing 3. The transmission can e.g. be a wire pull which actuates an operating part 6 of the release mechanism 2, which ensures that the current is interrupted when a fuse blows. The rear part 5 is of conductive material and has a switch 7 to one end switch 8 on a fuse 9. The fuse has a report button 10,

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3 og en udløserarm 11 ligger an mod meldeknappen 10. Udløserarmen 11 står, som tidligere forklaret, ved hjælp af wire-træk gennem det isolerende rør 4 i forbindelse med udløsermekanismen 2, fig. 1. Hvis sikringen går, vil meldeknappen forskydes til højre fig. 2, f.eks. af en spændt fjeder, og udløserarmen 11 vil blive ført til den stilling, som er vist med stiplede linier. Denne bevægelse fører til, at wiren 12 i overføringen 4, 12 vil trække i udløserdelen for udløsermekanismen 2, og bryderen vil blive udløst. Det fremgår af fig.3 and a release arm 11 abuts against the message button 10. The release arm 11 is, as previously explained, by means of wire pull through the insulating tube 4 in connection with the release mechanism 2, fig. If the fuse blows, the call button will move to the right fig. 2, e.g. of a tensioned spring, and the release arm 11 will be moved to the position shown in broken lines. This movement causes the wire 12 in the transmission 4, 12 to pull in the release part of the release mechanism 2, and the switch will be released. It can be seen from fig.

1, at sikringshusene 3 er let tilgængelige fra kompaktbryder-anlæggets forside, som er til venstre i fig. 1, når låget 13 fjernes, og en sikring er da let at skifte ud.. Rørene 4 af isolationsmateriale er i begge de åbne ender i forbindelse med den omgivende luft og strækker sig gennem rum, som er fyldt med isolerende gas, f.eks. svovlhexafluorid (SF6), og problemerne med tætning af dette rum mod omgivelserne, hvor rørene 4 går ud af rummet, er ubetydelige, idet man her har forbindelse mellem komponenter, som ikke bevæger sig i forhold til hinanden. Den bageste del 5 af hvert sikringshus 3 er af ledende materiale, som ligger på jordpotentiale.1, that the fuse housings 3 are easily accessible from the front of the compact circuit breaker system, which is on the left in fig. 1, when the lid 13 is removed, and a fuse is then easy to replace. The pipes 4 of insulating material are at both the open ends in connection with the ambient air and extend through spaces which are filled with insulating gas, e.g. . sulfur hexafluoride (SF6), and the problems of sealing this space towards the surroundings, where the pipes 4 exit the space, are insignificant, as here there is a connection between components which do not move in relation to each other. The rear part 5 of each fuse housing 3 is of conductive material which lies at ground potential.

Claims

Compact circuit breaker system with fuses which have a notification button and where the trigger mechanism of the circuit breaker must be actuated when the fuse trips, characterized in that a movable release arm (11) is arranged in the bottom (5) of each fuse housing (3), which is arranged for to be actuated by the safety button (10) of the fuse when the fuse trips, and is connected (4, 12) to the release mechanism (2) through an insulating tube (4), the fuse (9) being arranged with the reporting button (10) facing into the fuse housing rear part (5).

Plant according to Claim 1, characterized in that the connection between the release arm (11) and the release mechanism (12) is mechanical, hydraulic or pneumatic.

Plant according to Claim 1, characterized in that the rear part (5) of the fuse housing is made of conductive material.

System according to one or more of the preceding claims, characterized in that each connecting pipe (4) extends through the space of the switch system, which is filled with insulating gas, e.g. SF6.