DE3621690A1 - Deleting device for electrical switches - Google Patents

Deleting device for electrical switches

Info

Publication number
DE3621690A1
DE3621690A1 DE19863621690 DE3621690A DE3621690A1 DE 3621690 A1 DE3621690 A1 DE 3621690A1 DE 19863621690 DE19863621690 DE 19863621690 DE 3621690 A DE3621690 A DE 3621690A DE 3621690 A1 DE3621690 A1 DE 3621690A1
Authority
DE
Germany
Prior art keywords
contact
arc
prechamber
characterized
extinguishing device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
DE19863621690
Other languages
German (de)
Inventor
Klaus Dipl Ing Greefe
Werner Bruckner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ABB AG Germany
Original Assignee
BBC Brown Boveri AG Switzerland
BBC Brown Boveri AG Germany
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BBC Brown Boveri AG Switzerland, BBC Brown Boveri AG Germany filed Critical BBC Brown Boveri AG Switzerland
Priority to DE19863621690 priority Critical patent/DE3621690A1/en
Priority claimed from DE19873779188 external-priority patent/DE3779188D1/en
Publication of DE3621690A1 publication Critical patent/DE3621690A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/346Details concerning the arc formation chamber

Description

The invention relates to an extinguishing device for elec trical switches, especially power and line Circuit breaker, according to the preamble of claim 1.

Circuit breakers and miniature circuit breakers are included provided, in the event of a malfunction electrical lines are loaded with overcurrents of high amperage, from to separate the supply network. This is usually done a fixed and a movable contact piece are provided, which are connected to the respective terminals. When opening the switch contact, i.e. when lifting the movable contact piece, a Schaltlichtbo gene, which in a designated extinguishing facility device is deleted.

The basic structure of such with extinguishing device provided electrical switch is largely the same. The movable contact piece is an arc guide assigned to the rail, which serves to arc in to lead a stack of arc quenchers. On the Ge  There is a wide side of the stack of blanks re arc runner that with the fixed contact piece is connected. The area in front of the quenching plate sta pel is called the arc prechamber. You be stands out from the two guardrails and usually two plates facing each other to form the flange Kier the arc, which is preferably made of ceramic or a gas-emitting material.

Especially with switch systems that are very short-circuited act as a current limiter, is the quenching device from Importance. Prerequisite for an intense short circuit current limitation is a quick and wide contact opening voltage in the event of a short circuit. The one drawn Arc commutates from the contacts to the Lichtbo Genleitschienen around yourself in the Deion-Lösch dividing the chamber, that is the stack of quenching sheets. There, a high arc voltage becomes a current limiter generated so that the arc goes out.

Between the outer sides of the prechamber plate and the inner housing wall of the switching device is usually a gap that leads to a return of the overpressure the stack of quenchers allowed without the development of the To disrupt the arc. The back-flowing pressure wave serves to equalize the negative pressure and to deionize in the contact area.

The disadvantage with the previously known systems is that that the return of the pressure wave when closed Antechamber plates far above the contact point follows. The negative pressure is only relatively slow balanced and consequently there is a slow how consolidation of the contact route.

Another known variant is designed such that  the prechamber plates directly in the contact area Have opening, which quickly dismantle the Un terdruckes as well as a quick consolidation of the Contact route allows. On the other hand, however, this has the disadvantage that the emerging from the contact pieces first plasma column at the slightest inclination to one edge formed by the panel cut hits which causes the plasma to swirl and feel time delays in arcing has the consequence.

The formation of an oblique position of the plasma beam leaves already known from previously known contact systems no longer exclude the first load switching as a result of contact roughness and the resulting asymmetry trical power supply.

The invention therefore has as its object a Lö Switching device for electrical switches at the entrance to create the kind that is easy to set up and is inexpensive to manufacture and its design is one rapid reduction of negative pressure as well as a quick how consolidation of the contact path and the Arc development accelerates.

The solution to the problem is the characteristic Features of claim 1.

Thereafter it is provided that the prechamber plates in the con are closed and the arc column there are no disruptive edges even in the case of "skew". The for the rapid reduction of the negative pressure and with it associated deionization of the contact path Openings in the prechamber plates lie directly the back of the movable contact piece and worry for a quick "flushing" of the contact path, because  the movable contact piece is directed towards the openings moves.

Another advantage of the invention resides in the design of the housing in the direction of the arc opposite side of the fixed contact piece what for a rapid expansion of the resulting plasma acid le cares.

A web integrally formed in the housing, which from the holding tion of the fixed contact piece can be formed and as close as possible to the contact point, prevents the contact opening Pressure wave in the opposite direction of the arc set direction flows out. This speeds up the training the plasma jet in the desired direction and significantly increases the movement of the arc from the Contact area, resulting in less stress on the Contact area leads.

This and other advantageous embodiments and ver Improvements of the invention are the dependent claims remove.

Based on the drawing, in which an embodiment of the Invention is shown, the invention is intended to partial refinements and improvements of the Erfin and other advantages explained and be be written.

Show it:

Fig. 1 shows a section of a switch with front chamber in longitudinal section, in which the Festkon clock closes at the upper arc guide rail,

Fig. 2 shows a detail of a switch with pre-chamber in longitudinal section, wherein the fixed contact to the lower arc guide rail connects,

Fig. 3 shows a detail of a switch with antechamber in longitudinal section, in which the fixed contact connects to the upper arc guide rail and is covered with a web.

In Fig. 1 a section of a switch is shown in longitudinal section, which has a housing 10 with a prechamber 12 which is laterally limited by prechamber plates 13 . The pre-chamber 12 receives a contact point 14 , which is formed from a fixed contact piece 16 and egg nem movable contact piece 18 , which is connected via a connecting line 17 to a connector 19 .

A molded onto the housing wall 11 bracket 20 is used to fix the fixed contact piece 16 , which connects to an upper arc guide 22 , which together with a lower arc guide 24 limits a stack of fire-fighting sheets 26 in the vertical direction be.

The lower arc guide rail 24 continues in the connector 19 .

The prechamber plates 13 , which delimit the prechamber 12 since, are designed so that they cover the area at the contact points 14 and the stack of fire extinguishers 26 flush. At the back of the movable contact piece 18 , ie in the opening direction, an opening 15 is provided in the prechamber plates 13 , which serves to compensate for the negative pressure that occurs when the contact pieces 16 , 18 of the chamber 12 are opened and with the help of the openings 15 to contribute to deionization in the pre-chamber 12 gas stream. The latter feature can be enhanced by using gas-emitting material for the prechamber plates 13 .

It is essential for the effect of the arc steering that the contact point 14 is completely covered immediately on the side, so that the plasma column that arises when the arc is ignited is not laterally deflected and thus arrives at the stack of quenching plates 26 with a delay.

In Fig. 2 is also a section of a switch similar to that shown in Fig. 1, again in longitudinal section, but in which the contact point 34 between the fixed contact 36 and the movable contact 38 assumes another position. The housing 30 shown here also has a prechamber 32 , which is laterally limited by Vorkammerplat th 33 .

Compared to the embodiment shown in Fig. 1, the fixed contact piece connected here to the lower arc guide rail 44 36, while the movable con tact piece 38 is connected via a connecting line 37 with the upper arc guide rail 42nd To fix the upper arc guide rail 42 , a bracket 40 is formed on the housing wall 31 .

As is already known from FIG. 1, the arc guide rails 42 , 44 also form the upper and lower limits for an intermediate baffle plate stack 46 .

Likewise, as shown in FIG. 1 is already known, the Vorkammerplatte is provided with an opening 35 33 here, which is 38 also disposed on the back piece of the movable contact so that the contact point 34 is completely closed from the side. The purpose of this opening 35 in the prechamber plates 33 is the same as already described in FIG. 1.

The arrangement shown in FIG. 3 corresponds almost congruently to the design of a housing 10 of a switch with prechamber 12 known from FIG. 1, so that the reference numbers chosen in FIG. 1 can also be used here.

Deviating from the arrangement known from FIG. 1, the additional device of a web 21 , which covers the fixed contact piece 16 horizontally and protrudes into the chamber chamber 12 before. This web 21 , which is integrally formed on the bracket 20 connected to the housing wall 11 , prevents one of the direction of movement of the light arc, which occurs when the contact point 14 between the contact pieces 16, 18 is opened, in the opposite direction flow of the resulting gas stream.

This particular embodiment is a rapid expansion of the arc he aims advantageously. It is essential that the molded web 21 in the housing 20 is as close as possible to the contact point 14 and thereby aligns the pressure wave arising when the contact point 14 opens in the direction of light arc. The associated faster formation of the plasma in the desired direction significantly increases the speed of the arc out of the contact area. This is associated with a significantly lower load on the contact point 14 .

Claims (6)

1. extinguishing device for electrical switches, in particular circuit breakers and circuit breakers, in egg nem housing with at least one prechamber laterally delimited by prechamber plates, in which a rotatable or pivotable contact piece and a fixed contact piece form a contact point, with arc guide rails, each lead from the contact pieces to an arc-quenching plate stack, which they take between them, characterized in that the prechamber plates ( 13 , 33 ) in the area of the contact point ( 14 , 34 ) are closed, but in the area of the open position of the movable contact piece ( 18 , 38 ) in the prechamber plates ( 13 , 33 ) openings ( 15 , 35 ) are provided.
2. Extinguishing device according to claim 1, characterized in that the openings ( 15 , 35 ), which serve for the rapid compensation of negative pressure and for deionization at the contact point ( 14, 34 ), are arranged so that the movable contact piece ( 18 , 38 ) when opening the contact point ( 14 , 34 ) on the openings ( 15 , 35 ) zube moves.
3. Extinguishing device according to claim 1, characterized in that the fixed contact piece ( 16 , 36 ) is fixed by a molded onto the housing ( 10 , 30 ) holder, to which a web ( 21 ) connects, which when opening the contacts ( 16 , 18 , 36 , 38 ) resulting Druckwel le deflects in the arc running direction, which favors the expansion of the arc in the desired direction on the stack of quenching plates ( 26 , 46 ) and thereby the load on the contacts ( 16 , 18 , 36 , 38 ) reduced.
4. Extinguishing device according to one of the preceding claims, characterized in that the required contact area of the contacts ( 16 , 18 , 36 , 38 ) are reduced relative to the contact areas in conventional contacts.
5. Extinguishing device according to one of the preceding claims, characterized in that the openings ( 15 , 35 ) in the prechamber plates ( 13 , 33 ) are arranged symmetrically.
6. Extinguishing device according to one of claims 1 to 4, characterized in that the openings ( 15 , 35 ) in the prechamber plates ( 13 , 33 ) are arranged asymmetrically.
DE19863621690 1986-06-27 1986-06-27 Deleting device for electrical switches Withdrawn DE3621690A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19863621690 DE3621690A1 (en) 1986-06-27 1986-06-27 Deleting device for electrical switches

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19863621690 DE3621690A1 (en) 1986-06-27 1986-06-27 Deleting device for electrical switches
AT87109027T AT76536T (en) 1986-06-27 1987-06-23 Deleting device for electric switches.
DE19873779188 DE3779188D1 (en) 1986-06-27 1987-06-23 Deleting device for electric switches.
EP87109027A EP0251160B1 (en) 1986-06-27 1987-06-23 Quenching device for electric circuit breaker

Publications (1)

Publication Number Publication Date
DE3621690A1 true DE3621690A1 (en) 1988-01-14

Family

ID=6303906

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19863621690 Withdrawn DE3621690A1 (en) 1986-06-27 1986-06-27 Deleting device for electrical switches

Country Status (3)

Country Link
EP (1) EP0251160B1 (en)
AT (1) AT76536T (en)
DE (1) DE3621690A1 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3908102A1 (en) * 1989-03-13 1990-09-20 Licentia Gmbh Automatic circuit breaker, especially a line protective circuit breaker
EP0387761B1 (en) * 1989-03-13 1994-12-14 Licentia Patent-Verwaltungs-GmbH Automatic circuit breaker, particularly automatic cut-out
DE4007606A1 (en) * 1990-03-09 1991-09-12 Licentia Gmbh Automatic load protection switch
AT410725B (en) * 1993-11-02 2003-07-25 Felten & Guilleaume Ag Oester Self-switch
DE19518049A1 (en) * 1995-05-17 1996-11-21 Abb Patent Gmbh Arc extinguishing device esp. for small modular switch device e.g. circuit breaker
DE19518051A1 (en) * 1995-05-17 1996-11-21 Abb Patent Gmbh Arc extinguishing device esp. for small modular switch devices e.g. circuit breakers
DE102005007302A1 (en) * 2005-02-17 2006-08-24 Abb Patent Gmbh Switching device, e.g. line circuit breaker, has recess covered with diaphragm that is made of elastic material and in housing wall in area of electric arc-antechamber area, such that diaphragm extends in area
DE102005007299A1 (en) * 2005-02-17 2006-08-31 Abb Patent Gmbh Electrical installation equipment e.g. line circuit breaker, has main channel to receive and feed again leaking gas from outlet to inlet of arc quenching device for accelerating gas flow from point of origin of arc in direction of device
DE102005007282A1 (en) * 2005-02-17 2006-08-24 Abb Patent Gmbh Electrical installation device with arc prechamber space, prechamber plates and current limiting arc quenching device
DE102005022213A1 (en) 2005-05-13 2006-11-16 Abb Patent Gmbh Electrical installation device with arc prechamber space, prechamber plates and current limiting arc quenching device
DE102006027140A1 (en) * 2006-06-12 2007-12-13 Ellenberger & Poensgen Gmbh breaker
DE102007053636B3 (en) * 2007-11-08 2009-04-09 Abb Ag Electrical installation equipment e.g. circuit breaker, has opening receiving permanent magnet for producing alternating current or direct current glass device supporting arc guide during alternating current and direct current operations

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5663735A (en) * 1979-10-27 1981-05-30 Fuji Electric Co Ltd Circuit breaker
DE3339399C2 (en) * 1983-10-29 1992-07-30 Abl Sursum Bayerische Elektrozubehoer Gmbh & Co Kg, 8560 Lauf, De
FR2557354B1 (en) * 1983-12-26 1986-09-05 Merlin Gerin Miniature circuit breaker with improved dielectric hold
DE3413555C2 (en) * 1984-04-11 1993-05-06 Asea Brown Boveri Ag, 6800 Mannheim, De

Also Published As

Publication number Publication date
EP0251160A3 (en) 1988-08-24
EP0251160A2 (en) 1988-01-07
AT76536T (en) 1992-06-15
EP0251160B1 (en) 1992-05-20

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Legal Events

Date Code Title Description
8127 New person/name/address of the applicant

Owner name: ASEA BROWN BOVERI AG, 6800 MANNHEIM, DE

8141 Disposal/no request for examination