EP1998349B1 - High breaking capacity circuit breaker - Google Patents
High breaking capacity circuit breaker Download PDFInfo
- Publication number
- EP1998349B1 EP1998349B1 EP07425330A EP07425330A EP1998349B1 EP 1998349 B1 EP1998349 B1 EP 1998349B1 EP 07425330 A EP07425330 A EP 07425330A EP 07425330 A EP07425330 A EP 07425330A EP 1998349 B1 EP1998349 B1 EP 1998349B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- circuit breaker
- contact
- plate
- fixed
- base
- 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.)
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- 239000003302 ferromagnetic material Substances 0.000 claims description 5
- 239000011810 insulating material Substances 0.000 claims description 2
- 230000005294 ferromagnetic effect Effects 0.000 description 9
- 230000005291 magnetic effect Effects 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 238000010891 electric arc Methods 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 206010010254 Concussion Diseases 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 230000009514 concussion Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
- H01H9/346—Details concerning the arc formation chamber
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
- H01H9/446—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using magnetisable elements associated with the contacts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
- H01H9/36—Metal parts
Definitions
- the present invention relates to the field of circuit breakers and in particular to a high breaking capacity circuit breaker.
- a circuit breaker as defined in the preamble of claim 1 is already known from US 5 548 258 .
- a circuit breaker as a so called moulded case circuit breaker, comprises an electric circuit formed by a fixed electric contact and a movable electric contact.
- the fixed electric contact is integral with the circuit breaker body whereas the movable contact is rotatably hinged to the circuit breaker body, in order to be moved from an open to a closed position.
- the open position the movable electric contact is spaced apart from the fixed electric contact and the electric circuit of the circuit breaker is open.
- the closed position the movable electric contact abuts against the fixed contact and the electric circuit is closed.
- the circuit breaker In order to extinguish electric arcs formed during the opening/closing operations of the electric circuit, the circuit breaker is typically provided with a deionizing cell, which is positioned near the electric fixed and movable contacts.
- the fixed contact, the end portion of the movable contact which interacts with the fixed contact and the deionizing cell are contained inside an internal chamber of the circuit breaker called deionizing chamber.
- a characteristic parameter of a circuit breaker is the so-called breaking capacity, which may be defined as the maximum short-circuit current which may be interrupted by the circuit breaker.
- the current corresponding to the maximum breaking capacity is much higher (some orders of magnitude) with respect to the maximum nominal current of the circuit breaker.
- the latter is another characteristic property which may be defined as the maximum current the circuit breaker is able to withstand for an unlimited amount of time.
- the breaking capacity of a circuit breaker is a parameter which depends on the constructive characteristics of the same circuit breaker, as for example the circuit breaker size and the dielectric properties of the medium interposed between the movable and the fixed contact.
- the object of the present invention is to provide a circuit breaker having a breaking capacity higher than that of circuit breakers of the known art.
- circuit breaker 1 With reference to fig. 1 , a particularly preferred illustrative and non limiting embodiment of the circuit breaker according to the invention, is generally indicated by numeral 1.
- the circuit breaker 1 is for example a so called moulded case circuit breaker.
- a moulded case circuit breaker as opposed to a so called air circuit breaker, has a cased body 2 formed by insulating material, for holding the internal circuit breaker mechanism.
- Moulded case circuit breakers are generally used in automation industry as well as in the service and maintenance sector, for interrupting currents up to 1500 A.
- the circuit breaker 1 is embodied in a non limiting way by a moulded case automatic three-pole circuit breaker.
- the cased body 2 is formed by juxtaposing two shells, in particular a base shell, or base 3, and a lid shell, or lid 4.
- Such shells 3, 4 are juxtaposed and mutually fixed by fixing means, not shown in the figures, such as rivets, screws or bolts.
- a front overhanging portion is provided, commonly called “DIN front”, which is provided with a lever for operating circuit breaker 1, not shown.
- the cased body 2 of the circuit breaker is provided on the upper side 6 with three screw clamps 7, or input terminals 7, for connecting the circuit breaker 1 to electric mains cables. Analogous clamps, or output terminals, not shown, are provided on the lower side of cased body 2.
- the rear side 8 of cased body 2 is provided with suitable fixing means 9 for attaching the circuit breaker 1 to an electric panel.
- suitable fixing means 9 allow to fix the circuit breaker 1 to a DIN rail by using a mounting device as the one described in Italian patent application nr. RM 2006 A 000145 .
- openings 10 are provided for allowing the insertion, from the outside and from the rear side 8 of the circuit breaker 1, of the holding elements 20 for the fixed electric contacts of circuit breaker 1.
- the circuit breaker 1 is a three-pole circuit breaker, its rear side 8 is provided with three openings 10, each allowing the insertion of a respective holding element, or contact-holder 20, provided with a fixed electric contact.
- the contact holders 20 are comprised of copper or a copper alloy, for instance a copper and brass alloy.
- fixing means as for instance holes for corresponding screws 22, rivets or analogous fixing means are provided on the rear side 8 of circuit breaker 1, and on holding element 20 at least a hole 21 is provided, which cooperates with such fixing means.
- each of the contact holders 20 has a stepped end, provided with a hole 23 for receiving a corresponding screw, or a pin, of a connection screw terminal 7.
- the circuit breaker 1 is of the three-pole type, it is provided with three separate electric circuits to be operated simultaneously by a single lever. Each of these circuits is provided in order to interrupt a respective phase and comprises a pair of contacts, i.e. a fixed and a movable electric contact.
- a portion of the electric circuit of the circuit breaker 2 is illustrated in fig. 2 , which shows a fixed electric contact 25 and a movable electric contact 24. These contacts are preferably copper contacts.
- the fixed electric contact 25 is connected, for instance by welding or riveting, to the respective contact holder 20, already described with reference to fig. 1 .
- the movable electric contact 24 is fixed, for instance by welding or riveting, to a holding arm 26, which is rotatable about axis R-R. In this way, the movable electric contact 24 is rotatable in either direction along an arched trajectory T, defined between a first operating position, in which the movable contact 24 abuts against the fixed contact 25 and a second operating position, in which the movable contact 24 is positioned at a predetermined distance from the fixed electric contact 25.
- the first operating position corresponds to a closed circuit condition
- the second operating position illustrated in fig. 2
- a circuit breaker 1 further comprises two generally plate-like parallel elements 27, 28, made of ferromagnetic material, preferably iron with a relative permeability of approximately 10.000. These elements are distanced from each other near the fixed and movable contacts 24, 25, and are opposed to each other with respect to a plane comprising the trajectory T of movable contact 24.
- plate-like elements 28, 28 extend approximately starting from the fixed contact 25 to such an extent that at least a significant portion of trajectory T lies between these elements 27, 28.
- the significant portion corresponds at least to 50% of the total length of trajectory T. More preferably, this significant portion corresponds to at least 70% of the total length of said trajectory T.
- the two plate-like elements 27, 28 are portions of an integral ferromagnetic piece, further comprising a crossbar 29 connected to a respective end portion of each of plate-like elements 27, 28.
- this integral element which from now on will be called ferromagnetic element, is generally "C” or "U” shaped.
- the crossbar 29 of ferromagnetic element 27, 28, 29 is positioned underneath the fixed electric contact 25.
- the contact holder 20 is provided with a hook-shaped end portion, comprising a plate 31, on which the fixed contact 25 is fixed, wherein the crossbar 29 is positioned under said plate 31, and is interposed between the plate 31 and the remaining portion of contact holder 20.
- the ferromagnetic component 27, 28, 29 has also the task to fix the fixed contact 25 and its holder 20 to the base 3 of circuit breaker 1.
- each of the two plate-like elements 27, 28 is provided, at its distal end, with respect to the fixed contact 25, with fixing means 32 in order to fix the ferromagnetic element 28, 29, 29 to the base 3 of circuit breaker 1.
- these fixing means are formed by a pair of pins 32, wherein each pair has a plate-like element 27, 28 positioned on a respective end. The fixing procedure by means of pairs of pins 32 will be further explained in the following description.
- Fig. 3 shows a portion of the circuit breaker of fig. 1 , in which the base 3 of circuit breaker 1 is shown in a cross section A-A of fig. 1 .
- the movable electric contact 24 is in the closed position, i.e. it abuts against the fixed contact 25.
- This figure also shows the rotating mechanism 36 which acts on arm 26 holding the movable contact 24, in order to move it between its two operating positions.
- Fig. 4 shows an internal view of a portion of base 3, wherein the rotating mechanism 36, the holding arm 26 and the movable contact 24 have been omitted.
- the fixed contact 25 and the movable contact 24 are housed inside a chamber 35, usually called interruption chamber or deionizing chamber.
- a chamber 35 usually called interruption chamber or deionizing chamber.
- two lateral opposed walls 36, 37 of chamber 35 are provided with a respective wall portion 38, 39 projecting towards the inside of the interruption chamber 35 and provided with an internal cavity, which is best seen in fig. 3 , which is substantially isolated from the deionizing chamber 35 and receives a corresponding plate-like element 27, 28 of ferromagnetic element 27, 28, 29.
- each of the two cavities is closed on the upper side by a transverse wall 40, in which an opening is provided, through which a pair of pins 32 is to be inserted.
- the fixing of the ferromagnetic component 27, 28, 29 may for example be accomplished by means of metallic washers 33, in particular by inserting each pair of pins 32, after passing them through the openings provided on the transverse walls 40, into a respective washer 32, and then by parting the pins 32 of a same pair.
- circuit breaker 1 of the example shown is a three-pole circuit breaker, in fig. 4 three adjacent deionizing chambers 35 are at least partially shown. In one of these, a so called deionizing cell 50 is shown. Obviously, the other two chambers 35 are also normally provided with a respective deionizing cell 50, although in fig. 4 they are shown without such a cell.
- a particularly preferred embodiment of a deionizing cell 50 is shown in fig. 5 .
- the cell 50 comprises a group of densely packed parallel thin plates 51, which are joined together by opposite lateral bars 52.
- the thin plates 51 have an arched notch 53 in the portion directed towards the movable contact, so that a slot is defined inside the cell 50, which is generally parallel to trajectory T, and forms an invitation for the arc to be extinguished.
Landscapes
- Breakers (AREA)
Description
- The present invention relates to the field of circuit breakers and in particular to a high breaking capacity circuit breaker.
- A circuit breaker as defined in the preamble of
claim 1 is already known fromUS 5 548 258 . - As is known, a circuit breaker, as a so called moulded case circuit breaker, comprises an electric circuit formed by a fixed electric contact and a movable electric contact. Generally, inside the circuit breaker, the fixed electric contact is integral with the circuit breaker body whereas the movable contact is rotatably hinged to the circuit breaker body, in order to be moved from an open to a closed position. In the open position, the movable electric contact is spaced apart from the fixed electric contact and the electric circuit of the circuit breaker is open. On the contrary, in the closed position, the movable electric contact abuts against the fixed contact and the electric circuit is closed. In order to extinguish electric arcs formed during the opening/closing operations of the electric circuit, the circuit breaker is typically provided with a deionizing cell, which is positioned near the electric fixed and movable contacts. The fixed contact, the end portion of the movable contact which interacts with the fixed contact and the deionizing cell are contained inside an internal chamber of the circuit breaker called deionizing chamber.
- A characteristic parameter of a circuit breaker is the so-called breaking capacity, which may be defined as the maximum short-circuit current which may be interrupted by the circuit breaker. The current corresponding to the maximum breaking capacity is much higher (some orders of magnitude) with respect to the maximum nominal current of the circuit breaker. The latter is another characteristic property which may be defined as the maximum current the circuit breaker is able to withstand for an unlimited amount of time.
- The breaking capacity of a circuit breaker is a parameter which depends on the constructive characteristics of the same circuit breaker, as for example the circuit breaker size and the dielectric properties of the medium interposed between the movable and the fixed contact.
- The object of the present invention is to provide a circuit breaker having a breaking capacity higher than that of circuit breakers of the known art.
- This object is achieved by providing a circuit breaker as defined in the annexed
claim 1, in its broadest form, and as defined in the dependent claims, which refer to particular embodiments of the same. - The invention will be more easily understood in connection with the following detailed description of some of its embodiments, which are only provided as non limiting examples, with reference to the attached drawings, in which:
-
Fig. 1 shows an isometric view of the rear side of a particularly preferred embodiment of a circuit breaker according to the invention, wherein a component of said circuit breaker is shown separated from the circuit breaker, -
Fig. 2 shows some of the components of the electric circuit of the circuit breaker offig. 1 , -
Fig. 3 shows the arrangement of components offig. 3 in the circuit breaker offig. 1 , -
Fig. 4 shows a partial internal view of the circuit breaker offig. 1 , and -
Fig. 5 shows a deionizing cell, which may be used in the circuit breaker offig. 1 . - In the figures, identical or similar elements are indicated by the same numeral references.
- With reference to
fig. 1 , a particularly preferred illustrative and non limiting embodiment of the circuit breaker according to the invention, is generally indicated bynumeral 1. - In the particular embodiment of
fig. 1 , thecircuit breaker 1 is for example a so called moulded case circuit breaker. A moulded case circuit breaker, as opposed to a so called air circuit breaker, has a casedbody 2 formed by insulating material, for holding the internal circuit breaker mechanism. Moulded case circuit breakers are generally used in automation industry as well as in the service and maintenance sector, for interrupting currents up to 1500 A. - In the example shown, the
circuit breaker 1 is embodied in a non limiting way by a moulded case automatic three-pole circuit breaker. - The
cased body 2 is formed by juxtaposing two shells, in particular a base shell, orbase 3, and a lid shell, orlid 4.Such shells - At
lid 4, a front overhanging portion is provided, commonly called "DIN front", which is provided with a lever foroperating circuit breaker 1, not shown. - The
cased body 2 of the circuit breaker is provided on theupper side 6 with threescrew clamps 7, orinput terminals 7, for connecting thecircuit breaker 1 to electric mains cables. Analogous clamps, or output terminals, not shown, are provided on the lower side ofcased body 2. - The
rear side 8 ofcased body 2 is provided withsuitable fixing means 9 for attaching thecircuit breaker 1 to an electric panel. For instance, in a non limiting way, such fixing means allow to fix thecircuit breaker 1 to a DIN rail by using a mounting device as the one described in Italian patent application nr.RM 2006 A 000145 - As shown in
fig. 1 , on therear side 8 ofcased body 2openings 10 are provided for allowing the insertion, from the outside and from therear side 8 of thecircuit breaker 1, of the holdingelements 20 for the fixed electric contacts ofcircuit breaker 1. Since in the example shown, thecircuit breaker 1 is a three-pole circuit breaker, itsrear side 8 is provided with threeopenings 10, each allowing the insertion of a respective holding element, or contact-holder 20, provided with a fixed electric contact. Preferably, but in a non limiting way, thecontact holders 20 are comprised of copper or a copper alloy, for instance a copper and brass alloy. - Preferably, in order to fix the
contact holders 20 to the rear ofcircuit breaker 1, fixing means, as for instance holes for correspondingscrews 22, rivets or analogous fixing means are provided on therear side 8 ofcircuit breaker 1, and on holdingelement 20 at least ahole 21 is provided, which cooperates with such fixing means. - Preferably, each of the
contact holders 20 has a stepped end, provided with ahole 23 for receiving a corresponding screw, or a pin, of aconnection screw terminal 7. - As known, since the
circuit breaker 1 is of the three-pole type, it is provided with three separate electric circuits to be operated simultaneously by a single lever. Each of these circuits is provided in order to interrupt a respective phase and comprises a pair of contacts, i.e. a fixed and a movable electric contact. - A portion of the electric circuit of the
circuit breaker 2 is illustrated infig. 2 , which shows a fixedelectric contact 25 and a movableelectric contact 24. These contacts are preferably copper contacts. - The fixed
electric contact 25 is connected, for instance by welding or riveting, to therespective contact holder 20, already described with reference tofig. 1 . The movableelectric contact 24 is fixed, for instance by welding or riveting, to a holdingarm 26, which is rotatable about axis R-R. In this way, the movableelectric contact 24 is rotatable in either direction along an arched trajectory T, defined between a first operating position, in which themovable contact 24 abuts against the fixedcontact 25 and a second operating position, in which themovable contact 24 is positioned at a predetermined distance from the fixedelectric contact 25. The first operating position corresponds to a closed circuit condition, whereas the second operating position, illustrated infig. 2 , corresponds to an open circuit condition. - As shown in
fig. 2 , acircuit breaker 1 according to the present invention further comprises two generally plate-likeparallel elements movable contacts movable contact 24. Preferably, such plate-like elements contact 25 to such an extent that at least a significant portion of trajectory T lies between theseelements - In a particularly advantageous embodiment, as shown in
fig. 2 , the two plate-like elements crossbar 29 connected to a respective end portion of each of plate-like elements - In the particularly preferred embodiment of
fig. 2 , thecrossbar 29 offerromagnetic element electric contact 25. More in detail, thecontact holder 20 is provided with a hook-shaped end portion, comprising aplate 31, on which the fixedcontact 25 is fixed, wherein thecrossbar 29 is positioned under saidplate 31, and is interposed between theplate 31 and the remaining portion ofcontact holder 20. - In a particularly advantageous embodiment, the
ferromagnetic component contact 25 and itsholder 20 to thebase 3 ofcircuit breaker 1. To this end, each of the two plate-like elements contact 25, with fixing means 32 in order to fix theferromagnetic element base 3 ofcircuit breaker 1. In the particular embodiment shown, these fixing means are formed by a pair ofpins 32, wherein each pair has a plate-like element pins 32 will be further explained in the following description. -
Fig. 3 shows a portion of the circuit breaker offig. 1 , in which thebase 3 ofcircuit breaker 1 is shown in a cross section A-A offig. 1 . Infig. 3 , the movableelectric contact 24 is in the closed position, i.e. it abuts against the fixedcontact 25. This figure also shows therotating mechanism 36 which acts onarm 26 holding themovable contact 24, in order to move it between its two operating positions. -
Fig. 4 shows an internal view of a portion ofbase 3, wherein therotating mechanism 36, the holdingarm 26 and themovable contact 24 have been omitted. - As can be seen in
fig. 3 and 4 , the fixedcontact 25 and themovable contact 24 are housed inside achamber 35, usually called interruption chamber or deionizing chamber. In a particularly preferred embodiment, two lateralopposed walls chamber 35 are provided with arespective wall portion interruption chamber 35 and provided with an internal cavity, which is best seen infig. 3 , which is substantially isolated from the deionizingchamber 35 and receives a corresponding plate-like element ferromagnetic element - As can be seen in
fig. 3 , each of the two cavities is closed on the upper side by atransverse wall 40, in which an opening is provided, through which a pair ofpins 32 is to be inserted. The fixing of theferromagnetic component metallic washers 33, in particular by inserting each pair ofpins 32, after passing them through the openings provided on thetransverse walls 40, into arespective washer 32, and then by parting thepins 32 of a same pair. - It is to be noted that by letting the
crossbar 29 of theferromagnetic component plate 31 supporting the fixedcontact 25 and by fixing theferromagnetic component base 2 of thecircuit breaker 1, for example as shown above, the fixedcontact 25 is firmly fixed to thebase 2, forming a structural arrangement which is very resistant to concussions originating from the closing of themovable contact 25. - Furthermore it is to be noted that by providing the insertion of the two plate-
like elements lateral walls chamber 35 are greatly reinforced. Thesewalls circuit breaker 1. Such stresses are caused by a significant heating of gas inside thechamber 35, due to the generation of the electric arc, which determines a great increase of volume of said gas inside the chamber. - Since the
circuit breaker 1 of the example shown is a three-pole circuit breaker, infig. 4 threeadjacent deionizing chambers 35 are at least partially shown. In one of these, a so called deionizingcell 50 is shown. Obviously, the other twochambers 35 are also normally provided with arespective deionizing cell 50, although infig. 4 they are shown without such a cell. - A particularly preferred embodiment of a deionizing
cell 50 is shown infig. 5 . Thecell 50 comprises a group of densely packed parallelthin plates 51, which are joined together by opposite lateral bars 52. Thethin plates 51 have anarched notch 53 in the portion directed towards the movable contact, so that a slot is defined inside thecell 50, which is generally parallel to trajectory T, and forms an invitation for the arc to be extinguished. - Simulations and experimental tests have shown that a circuit breaker according to the invention is able to achieve the goal previously described with reference to circuit breakers according to the known art.
- In particular it has been observed that the presence of the plate-
like elements - In other words, a confinement of the magnetic field between the plate-
like elements like elements cell 50. This allows to obtain a circuit breaker which, with respect to the circuit breakers of the known art, has better characteristics in terms of breaking capacity. - Obviously, a skilled in the art, in order to satisfy contingent and specific needs, may introduce various modifications and changes to the above described circuit breaker, wherein these modifications and changes are by the way all comprised in the scope of protection, as defined in the following claims.
Claims (13)
- Circuit breaker (1) comprising:- an electric circuit having at least a fixed electric contact (25) and at least a movable electric contact (24), wherein the movable contact (24) is rotatable along a trajectory (T) lying in a plane and defined between a first operating position, in which the movable contact (24) abuts against the fixed contact (25) and a second operating position, in which the movable contact (24) is positioned at a predetermined distance from the fixed contact (25), wherein the circuit breaker (1) further comprises a holding element (20) for the fixed contact (25),- two generally plate-like parallel elements (27, 28), made of ferromagnetic material, positioned at a certain mutual distance on opposite sides with respect to said plane, said elements (27, 28) being portions of a single component (27, 28, 29), made of ferromagnetic material, comprising a crossbar (19) connected to a respective end portion of said plate-like elements (27, 28),- a cased body (2) with a base (3) of insulating material and a cover part (4), which may be put over the base (2), said component of ferromagnetic material (27, 28, 29) further forming a fixing element in order to fix the fixed contact (25) to the base (3),characterized in that
said component (27, 28, 29) and said holding element (20) is joined to said base (3) by inserting them into the base (3) from the opposite side (8) of the base (3), with respect to said cover part (5). - Circuit breaker (1) according to claim 1, wherein the length of said elements (27, 28), starting from said fixed contact (25), is such that a significant portion of said trajectory (T) is interposed between said elements (27, 28).
- Circuit breaker (1) according to claim 2, wherein said significant portion is at least equal to 50% of the total length of said trajectory (T).
- Circuit breaker (1) according to claim 2, wherein said portion is at least equal to 75% of the total length of said trajectory (T).
- Circuit breaker (1) according to claim 1, wherein said component (27, 28, 29) is substantially "C"- or "U" shaped.
- Circuit breaker (1) according to claim 1, wherein the crossbar (29) is positioned underneath the fixed electric contact (25).
- Circuit breaker (1) according to claim 6, wherein the holding element (20) is provided with a hooked end portion, comprising a holding plate (31), to which the fixed contact (25) is fixed, wherein the crossbar (29) is positioned between the holding plate (31) and an opposite portion of said hooked end.
- Circuit breaker (1) according to claim 7, wherein the crossbar (29) is in contact with the holding plate (31).
- Circuit breaker (1) according to claim 1, wherein the base comprises a deionizing chamber (35), housing the electric fixed (25) and movable (24) contacts, said chamber (35) being defined between two lateral opposite walls (35, 37), with respect to said plane, each of said walls comprising a cavity (38, 39) for receiving a respective one of said plate-like elements (27, 28).
- Circuit breaker (1) according to claim 1, wherein each of said plate-like element (27, 28) comprises an end portion, distally positioned with respect to said crossbar (29), and which is provided with means (32) for fixing said component to said base.
- Circuit breaker (1) according to claim 10, wherein said means comprise for each plate-like element (27, 28) a pair of parallel pins (32), which may be parted after inserting said plate-like element in respective cavity (38, 39).
- Circuit breaker (1) according to any of the preceding claims, wherein said circuit breaker is a moulded case automatic circuit breaker.
- Circuit breaker (1) according to claim 12, wherein said circuit breaker is a three-pole or a four-pole circuit breaker.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL07425330T PL1998349T3 (en) | 2007-05-30 | 2007-05-30 | High breaking capacity circuit breaker |
ES07425330T ES2391200T3 (en) | 2007-05-30 | 2007-05-30 | Circuit breaker with high disconnection capacity |
EP07425330A EP1998349B1 (en) | 2007-05-30 | 2007-05-30 | High breaking capacity circuit breaker |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07425330A EP1998349B1 (en) | 2007-05-30 | 2007-05-30 | High breaking capacity circuit breaker |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1998349A1 EP1998349A1 (en) | 2008-12-03 |
EP1998349B1 true EP1998349B1 (en) | 2012-07-11 |
Family
ID=38481399
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07425330A Active EP1998349B1 (en) | 2007-05-30 | 2007-05-30 | High breaking capacity circuit breaker |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1998349B1 (en) |
ES (1) | ES2391200T3 (en) |
PL (1) | PL1998349T3 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7716816B2 (en) | 2006-09-22 | 2010-05-18 | Rockwell Automation Technologies, Inc. | Method of manufacturing a switch assembly |
US7551050B2 (en) | 2006-09-22 | 2009-06-23 | Rockwell Automation Technologies, Inc. | Contactor assembly with arc steering system |
JP2011014246A (en) * | 2009-06-30 | 2011-01-20 | Fuji Electric Fa Components & Systems Co Ltd | Circuit breaker |
EP3025361B1 (en) * | 2013-12-18 | 2018-03-07 | Siemens Aktiengesellschaft | Switching device with electromagnetic arc deflection |
CN105097333B (en) * | 2014-04-21 | 2018-01-16 | 西门子公司 | The arc extinguishing component and its switching device of switching device |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1104019B (en) * | 1959-09-11 | 1961-04-06 | Continental Elektro Ind Ag | Arc extinguishing chamber for electrical circuit breakers |
JPH07296707A (en) * | 1994-04-26 | 1995-11-10 | Fuji Electric Co Ltd | Magnetic driving iron core insulating device for circuit breaker |
US5589672A (en) * | 1994-06-14 | 1996-12-31 | Fuji Electric Co., Ltd. | Circuit breaker with arc quenching device and vent |
DE202006005418U1 (en) * | 2006-04-04 | 2006-06-08 | Moeller Gmbh | Electrical switching chamber for use in low tension switchgear has u-shaped metal handle, whose external blade runs at distance to contact arrangement between it and lateral switching chamber walls |
-
2007
- 2007-05-30 PL PL07425330T patent/PL1998349T3/en unknown
- 2007-05-30 EP EP07425330A patent/EP1998349B1/en active Active
- 2007-05-30 ES ES07425330T patent/ES2391200T3/en active Active
Also Published As
Publication number | Publication date |
---|---|
EP1998349A1 (en) | 2008-12-03 |
ES2391200T3 (en) | 2012-11-22 |
PL1998349T3 (en) | 2012-11-30 |
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