(19) |
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EP 2 645 487 B1 |
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EUROPEAN PATENT SPECIFICATION |
(45) |
Mention of the grant of the patent: |
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24.09.2014 Bulletin 2014/39 |
(22) |
Date of filing: 29.03.2012 |
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(51) |
International Patent Classification (IPC):
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(54) |
A pole connector for in-series circuit breakers
Polverbinder für Reihenschaltung
Connecteur polaire pour disjoncteurs en série
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(84) |
Designated Contracting States: |
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AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL
NO PL PT RO RS SE SI SK SM TR |
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Date of publication of application: |
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02.10.2013 Bulletin 2013/40 |
(73) |
Proprietor: ABB Technology AG |
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8050 Zürich (CH) |
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(72) |
Inventors: |
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- Ludowski, Pawel
31-411 Krakow (PL)
- Scholz, Dirk
8153 Rumlang (CH)
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(74) |
Representative: Chochorowska-Winiarska, Krystyna |
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ABB Sp. z o. o.,
Ul. Zeganska 1 04-713 Warszawa 04-713 Warszawa (PL) |
(56) |
References cited: :
EP-A1- 1 326 262 CN-Y- 201 130 238 KR-B1- 101 055 657
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EP-A1- 2 280 460 JP-A- 2010 259 170 US-B1- 6 666 713
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Note: Within nine months from the publication of the mention of the grant of the European
patent, any person may give notice to the European Patent Office of opposition to
the European patent
granted. Notice of opposition shall be filed in a written reasoned statement. It shall
not be deemed to
have been filed until the opposition fee has been paid. (Art. 99(1) European Patent
Convention).
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[0001] The invention relates to a pole connector for in-series circuit breakers, and in
particular to miniature circuit breaker (MCB) installed alongside each other on a
busbar. In particular, the connector is suitable for use with circuit breakers of
rated current in excess of 50A, used in photovoltaic equipment.
[0002] Circuit breakers used to protect photovoltaic equipment are exposed to high ambient
temperatures during operation and they have to be resistant to high temperatures of
up to 50 degrees centigrade. Circuit breakers which protect a photovoltaic panel are
connected in twos in series and they are located before the photovoltaic panel and
after it in the electric circuit. If circuit breakers of the upper range of rated
currents are used, and in particular a circuit breaker of a rated current of 125 A,
roughly 50% of heat generated by the flow of current through it is dispersed through
conductors connected to each individual circuit breaker, i.e. the incoming and outgoing
leads. By eliminating incoming conductors located in the upper part of the circuit
breaker and replacing them with a short section of a conductor in the form of an electric
connector, the possibility to carry away heat generated in the circuit breaker is
eliminated which results in overheating the circuit breaker. In increased ambient
temperature conditions that occur in the areas of application of photovoltaic equipment,
the increased amount of heat generated in circuit breakers often leads to a considerable
increase in temperature in the box in which they have been installed and consequently
to fire.
The purpose of the invention is to design a new connector which, in addition to the
ability to conduct current of intensity exceeding 50 A, and especially of 125 A, will
be able to carry away heat generated by the flow of current through the connector
and a part of heat generated by the flow of current through two MCBs connected in
series.
[0003] At present, on the market there is available a connector offered by ABB under catalogue
number 2CCS800900R0411, EAN No. 7612271211295 marked as S802-LINK50. The connector
is a rectangular copper plate which is provided with two flat conducting terminals
protruding above the plate, which are situated along the longer axis of the plate
or parallel to that axis, the distance between the conducting terminals depending
on the type of the circuit breakers that are to be electrically connected in pairs
with each other, and corresponding to the distance between the circuit breaker terminals
located in the cable holes of each MCB pair connected in series and situated on a
common conducting bus. The connector terminals, after being placed in the circuit
breaker cable hole, are connected with the circuit breaker terminals by means of press
bolts or set screws. The copper plate protruding above the openings of the interconnected
circuit breakers is covered by an insulating cover that covers the cable holes of
the connected circuit breakers. The cover is made of plastic and its function is to
electrically insulate the circuit breaker connectors. The S802-LINK50 connector allows
the flow of maximum current of 50A which is limited by the ability of the connector
to dissipate heat.
[0004] In its catalogue materials, Schneider Electric describes a connector used to connect
two in-series circuit breakers, and in particular overcurrent circuit breakers. The
connector consists of a rectangular conducting plate provided with a rectangular recess
situated centrally in the plate plane on one of the longer sides of the plate, whose
depth depends on the level of location of the breaker terminal in the cable hole of
the circuit breaker. Elements of the conducting plate situated at both sides of the
recess are parallel to one another and they make the connector terminals which are
connected with the circuit breaker terminals, after the terminals have been placed
in the cable holes of the circuit breakers that are to be connected with each other.
Each terminal has an opening for a screw or bolt fixing the conducting plate to the
circuit breaker terminals. A metal radiator in the form of a plate with protruding
ribs parallel to one another and located on one of the flat surfaces of the plate,
which ribs are grouped on the sides of the plate on the left and on the right, is
attached to one of the flat surfaces of the plate. The central surface of the plate
between the ribs on the left and right has suitable openings for placing in them bolts
or screws that fix the radiator to the surface of the conducting plate of the connector.
The connector terminals are placed in the cable holes of the circuit breaker in such
way that the radiator ribs are in the upper and bottom part of the circuit breaker,
on the same side as the lever used to change the operating status of the circuit breaker.
A disadvantage of this connector is the lack of any electric insulation, which necessitates
the use of an additional cover made of insulating material on the connector, which
worsens the ability of the device to carry heat away.
[0005] The pole connector for a set of in-series circuit breakers mounted on a bus bar is
made in the form of a conducting aluminum element which comprises conducting terminals
and cooling ribs of a length of "Sa" which are located on the connector front. The
connector according to the invention is
characterized in that it has additional cooling ribs of a length of "Sb" constituting a fragment of the
conducting element, which are located on the back of the connector. The external surface
of the aluminum conducting element together with the cooling ribs with the exception
of the conducting terminals is covered with an electrically insulating coat made of
a polyamide material of thermal conductivity in excess of 0.2 W/(m·K) and of a dielectric
strength of at least 15 kV/mm or of a polyurethane material of a thermal conductivity
in excess of 0.1 W/(m·K) and of a dielectric strength of at least 10 kV/mm, which
sticks tightly to the external surface of the conducting.element.
[0006] Preferably cooling ribs of a length of "Sb" are grouped in pairs between which a
free space is formed to allow escape of exhaust gases from individual circuit breakers,
after installation of the connectors on the circuit breaker set.
[0007] Preferably, the cooling ribs have the form of vertical plates situated parallel to
one another, and their height "H" is bigger than the length "Sa" and the length "Sb",
and the length of the ribs on the front of the connector is bigger than the length
of the ribs on the back of the connector.
[0008] Preferably, a framing comprising a transverse shield constituting an integral part
of the conducting element is connected to the ends of the extreme ribs situated on
the front of the connector, on the side where the conducting terminals are located.
The shield is connected with the bottom wall that connects the ribs on the bottom
part of the connector. The bottom part of the shield has the shape of semicircles
connected with one another.
[0009] Preferably there are ports situated in the semicircles of the shield.
[0010] Alternatively, the cooling ribs of the bigger length Sa are made of irregular elements
which in outline, on the front side of the connector, have a shape similar to the
cross-section of the walls of a goblet whose bottom part is surrounded, on the outside
of the goblet, by fragments of the parallel bottom walls of the goblet, a longitudinal
partition is located in the longitudinal axis of the goblet, and in the upper part
of the goblet between the longitudinal partition and the goblet walls there are located
side partitions. The bottom of the goblet is situated on the same side as the connector
terminals, or on the other side.
[0011] A set of connectors for mounting on a busbar comprises at least one pair of circuit
breakers electrically connected with each other by means of a connector for in-series
circuit breakers, in which individual circuit breakers have cable holes in which terminals
to be connected with the connector are placed. Each circuit breaker has a front side
with an "ON" and "OFF" status switch and a rear side situated parallel to the front
side. The connector set according to the invention is characterized by the fact that
the connector is made according to any of the claims 1 through 6, and the rear side
of the connector comprises cooling ribs situated on the rear side of the circuit breakers
and it has free spaces between these ribs, whose function is to let out gases from
the circuit breakers if a short circuit occurs in the circuit breakers.
[0012] The connector according to the invention has simple design and small dimensions,
which permits its use in circuit breaker sets used in standard connection boxes. The
connector has remarkably high ability to dissipate heat by natural convection and
it is excellently suitable for applications in photovoltaic equipment. At the same
time, the connector is distinguished by its dielectric strength, which makes it safe
and eliminates electric shock hazard even if it is touched. An additional advantage
is its resistance to the harmful effect of gases blown out from the arc chamber, produced
by the arc generated while disconnecting fault current in the MCB. Another advantage
of the connector is the simple process of its production.
[0013] The invention is presented as an embodiment in the drawing where fig. 1 shows the
connector in top view, fig. 2 - a section through the connector from fig. 1 along
the line "A-A", fig. 3 - the connector in the first variety of the invention embodiment
in axonometric projection, fig. 4 - the connector in the second variety of the invention
embodiment in axonometric projection, fig. 5 - the connector in the third variety
of the invention embodiment and in the first version of its embodiment in axonometric
projection, fig. 6 - the connector in the third variety of the invention embodiment
and in the second version of its embodiment in axonometric projection, fig. 7 - a
set of circuit breakers with the connector made according to the first variety of
the invention embodiment in axonometric projection, fig. 8 - a set of circuit breakers
with the connector made according to the second variety of the invention embodiment
in axonometric projection, fig. 9 - a set of circuit breakers with the connector made
according to the third variety of the invention embodiment and in the first version
of its embodiment in axonometric projection, and fig. 10 - a set of circuit breakers
with the connector made according to the third variety of the invention embodiment
and in the second version of its embodiment in axonometric projection.
[0014] The connector according to the invention is an aluminum conducting element 1 consisting
of a base plate 2, conducting terminals 3 situated perpendicularly to the plate 2
on the same side of the plate, and cooling ribs 4a and 4b, extending on both sides
of the plate 2, perpendicularly to the flat surface of the plate. The shape and the
dimensions of the terminals 3 fit the shape and dimensions of the cable holes made
in the circuit breakers that are being connected with each other. All elements of
the connector constitute one integrated whole, although in fig. 2 the plate 2 is separated
from the terminals 3 by a dashed line, which allows to better explain the invention.
The whole surface of the conducting aluminum element 1, with the exception of the
terminals 3, is covered by an electrically insulating coat 5 made of polyamide material
of thermal conductivity in excess of 0.2 W/(m·K) and of dielectric strength of at
least 15 kV/mm, or of polyurethane material of thermal conductivity in excess of 0.1
W/(m·K) and of dielectric strength of at least 10 kV/mm, which sticks tightly to the
external surface of the element 1, with the exception of its terminals 3.
[0015] The number of cooling ribs is different on the two sides of the plate 2. More ribs
are on the front side of the connector, which side, after the connector has been installed
on the circuit breaker, is situated on the front of the circuit breaker. The length
of these ribs measured in the direction perpendicular to the flat surface of the plate
2 of the element 1 is marked as Sa. Less ribs are on the rear side of the connector,
which side, after the connector has been installed on the circuit breaker, is situated
at the back of the circuit breaker. The length of these ribs measured in the direction
perpendicular to the flat surface of the plate 2 of the element 1 is marked as Sb.
The length Sa is bigger than the length Sb. The ribs 4a and 4b extend along the height
H of the connector, the height H being much bigger than the length of the ribs Sa
and Sb. The ribs of the length Sb are grouped in pairs between which there are free
spaces 6. The free spaces 6, situated between the individual ribs 4b, after the connector
has been installed on the circuit breaker, facilitate flow of exhaust gases from the
circuit breaker during its operation.
[0016] The aluminum element 1 is produced in a high-pressure die casting process in a mold
of a complex shape. Next, depending on the type of material used for the coat 5, the
aluminum element is preheated to a temperature of 50 - 90 °C if polyamide coat is
used, or to a temperature of 50 - 60 °C if polyurethane coat is used. The preheated
aluminum element 1 is coated with the coat 5 using the overmolding process in a die
whose temperature is equal to the temperature of the preheated aluminum element 1.
After the completion of the process of coating by casting liquid polyamide or polyurethane
material into the mold, the coat 5 is hardened either by reducing the temperature
below the freezing point of the polyamide material for the coat made of the polyamide
material, or through known chemical reactions if polyurethane material is used.
[0017] In the first variety of its embodiment, the invention comprises vertical ribs 4a and 4b which are situated
parallel to each other on each flat side of the base plate 2.
[0018] In the second variety of its embodiment, the invention comprises vertical ribs 4a and 4b which are situated
parallel to each other on each flat side of the base plate 2, a framing 4c surrounding
the bottom contour of the connector at the front and sides of the connector being
attached to the bottom ends of the ribs, which framing constitutes a whole with the
aluminum element 1. In the drawing, the framing 4c is marked by a conventional dashed
line. The framing 4c is integrated with the aluminum element 1 and it comprises an
external transverse shield 7 parallel to the surface of the plate 2, joining the individual
ribs 4a on the bottom part of the ribs, which is fixed also to the bottom wall 8 closing
the space between the ribs 4a on their lower side. The shield 7 has the shape of flat
semicircles 9 fixed to the framing 4c on the front of the connector. In the semicircles
9 there are ports 10 through which the bolts of the cable terminals of the connector
are tightened, which is not shown in the drawing. The shape of the shield 7 is adjusted
to the circuit breaker design, so that after the installation of the connector on
the circuit breakers, the shield covers the space under the connector including the
upper parts of two neighboring circuit breakers.
[0019] In the third variety of its embodiment, the invention is presented In two versions. In the first version
the connector comprises ribbings 4a and 4b, which are made as follows. The ribbing
7b is made in the form of vertical ribs as in the first and second variety of the
invention embodiment, whereas the ribs 4a on the front of the connector have different
shapes, and their general view has a shape similar to the cross-section of the walls
of a goblet 11. The bottom part of the goblet walls is surrounded, on the outside
of the goblet, by fragments of the parallel bottom walls 12 of the goblet A longitudinal
partition 13 is located in the longitudinal axis of the goblet, and in the upper part
of the goblet, between the longitudinal partition 13 and the walls of the goblet 11,
side partitions 14 are located. In this variety, the bottom of the goblet is situated
on the same side of the connector on which the terminals 3 of the connector are located.
[0020] In the second version of the third variety of the invention embodiment, the connector has the same elements as in the first version of this variety of the
invention embodiment, but the bottom of the goblet is situated on the side of the
connector opposite to that on which the terminals 3 of the connector are located.
[0021] The terminals 3 of the connector according to the invention are clamped in the cable
holes of the circuit breakers 20, so that one connector terminal is clamped in the
cable hole of one circuit breaker, and the second connector terminal is clamped in
the second cable hole of the second circuit breaker, by which an electric in-series
coupling between the circuit breakers 20 is obtained. Depending on the type of the
connector used and the circuit breakers which may comprise or not insulating covers
21 located on their upper parts, various practical sets of circuit breakers are obtained
which are ready for installation on the busbar in the connection box of electric equipment
protected by such sets. The connectors according to the invention are placed in a
single set in such way that the front wall of the connector, comprising the cooling
ribs 4a of the bigger length Sa, is situated on the front side of both circuit breakers,
comprising the "ON" / "OFF" switch marked as 22. The rear wall of the connector, comprising
the cooling ribs of the lesser length Sb, is situated on the rear sides of the two
circuit breakers.
[0022] Examples of circuit breaker sets for installation on a bus are shown in fig. 7-10.
[0023] The set in fig. 7 comprises two circuit breakers 20 coupled with the connector according
to the invention. In the presented set, the circuit breakers 20 are provided with
insulating covers 21 located on the front walls of the circuit breakers, comprising
operating status switches 22. In this case, between the lower part of the connector
and the upper walls of the circuit breakers there is an air gap situated around the
lower part of the connector. In the insulating covers there are holes through which
a set screw is inserted which fixes the terminals 3 to the terminals of the circuit
breakers, which are not shown in the drawing.
[0024] The set in fig. 8 comprises two circuit breakers 20 coupled with each other by means
of the connector according to the invention. In this combination, the circuit breakers
20 lack the insulating covers 21, because their function is performed by the shield
7 and the framing 4c of the connector made according to the third variety of the invention
embodiment.
[0025] The sets shown in fig. 9 and fig. 10 comprise two circuit breakers 20 coupled with
each other by means of the connector which is made according to the third and fourth
variety of the invention embodiment, and the circuit breakers 20 have the insulating
covers 21.
1. A pole connector for a set of in-series circuit breakers mounted on a bus bar, made
in the form of an aluminum conducting element (1), comprising conducting terminals
(3) and cooling ribs (4a) of a length of (Sa) placed on the front of the connector,
characterized in that it has additional cooling ribs (4b) of a length of (Sb) which make a fragment of
the conducting element (1) and which are located on the back of the connector, and
the external surface of the aluminum conducting element (1) with the ribs (4a) and
(4b) with the exception of the conducting terminals (3), is covered by an electrically
insulating coat (5) made of polyamide material of thermal conductivity in excess of
0.2 W/(m·K) and of dielectric strength of at least 15 kV/mm, or of polyurethane material
of thermal conductivity in excess of 0.1 W/(m·K) and of dielectric strength of at
least 10 kV/mm, which sticks tightly to the external surface of the conducting element
(1).
2. A connector according to claim 1, characterized in that the cooling ribs (4b) of a length of (Sb) are grouped in pairs between which a free
space (6) is formed to permit escape of exhaust gases from individual circuit breakers,
after the connectors have been installed on the circuit breaker set.
3. A connector according to claim 1, characterized in that the ribs (4a) and (4b) have the form of vertical ribs situated parallel to one another,
and their height (H) is bigger than the length (Sa) of the ribs (4a) and bigger than
the length (Sb) of the ribs (4b), and the length of the ribs (Sa) on the front of
the connector is bigger than the length (Sb) of the ribs on the back of the connector.
4. A connector according to claim 3, characterized in that to the ends of the extreme ribs (4a), on the side where the terminals (3) are situated,
there is connected a framing (4c) comprising a crosswise shield (7) constituting an
integral part of the conducting element (1), connected with the bottom wall (8) that
connects the ribs (4a) on the bottom of the connector, and the bottom part of the
shield (7) has the shape of interconnected semicircles (9).
5. A connector according to claim 4, characterized in that there are ports (10) situated in the semicircles (9).
6. A connector according to claim 1, characterized in that the cooling ribs (4a) of the bigger length (Sa) are made of irregular elements which
in outline, on the front side of the connector, have a shape similar to a cross-section
of the walls of a goblet (11) whose bottom part is surrounded, on the outside of the
goblet, by fragments of the parallel bottom walls (12) of the goblet, a longitudinal
partition (13) is located in the longitudinal axis of the goblet, and in the upper
part of the goblet between the partition (13) and the goblet walls (11) there are
located side partitions (14), the bottom of the goblet (11) being situated on the
same side as the terminals (3) of the conducting element (1), or on the other side.
7. A set of connectors for mounting on a busbar, comprising at least one pair of circuit
breakers (20) electrically connected with each other by means of a connector for in-series
circuit breakers, in which individual circuit breakers (20) have cable holes in which
terminals for connecting with the connector are located, and each circuit breaker
has a front side with an "ON" / "OFF" status switch (22) and a rear side situated
parallel to the front side, characterized in that the connector is made according to any of the claims 1-6, and the rear side of the
connector comprising the cooling ribs (4b) is situated on the rear side of the circuit
breakers and it has free spaces (6) between the ribs (4b) intended for letting out
gases from the circuit breakers if a short circuit occurs in the circuit breakers.
1. Ein Polverbinder für Reihenschaltung, montiert auf einer Sammelschiene, die in Form
eines Aluminium-Leitelements (1) ausgeführt ist und Anschlussklemmen (3) und Kühlrippen
(4a) mit der Länge (Sa) besitzt, die auf der Vorderseite des Verbinders angeordnet
sind, dadurch gekennzeichnet, dass er zusätzliche Kühlrippen (4b) mit der Länge (Sb) hat, die einen Teil des Leitelements
(1) ausmachen und die auf der Rückseite des Verbinders angeordnet sind, wobei die
äußere Oberfläche des Aluminium-Leitelements (1) mit den Rippen (4a) und (4b), mit
Ausnahme der Anschlussklemmen (3), mit einem elektrisch isolierenden Überzug (5) bedeckt
ist, hergestellt aus einem Polyamid mit einer thermischen Leitfähigkeit von mehr als
0,2 W/(m·K) und einer Durchschlagsfestigkeit von mindestens 15 kV/mm oder aus Polyurethan
mit einer thermischen Leitfähigkeit von mehr als 0,1 W/(m·K) und einer Durchschlagsfestigkeit
von mindestens 10 kV/mm, der fest auf der äußeren Oberfläche des Leitelements (1)
haftet.
2. Ein Verbinder gemäß Anspruch 1, dadurch gekennzeichnet, dass die Kühlrippen (4b) mit der Länge (Sb) in Paaren angeordnet sind, zwischen denen
ein Zwischenraum (6) besteht, um das Entweichen der Abgase der einzelnen Ausschalter
zu ermöglichen, nachdem die Verbinder auf dem Schalterset installiert sind.
3. Ein Verbinder gemäß Anspruch 1, dadurch gekennzeichnet, dass die Rippen (4a) und (4b) die Form von vertikalen, parallel zueinander angeordneten
Rippen haben und ihre Höhe (H) größer ist als die Länge (Sa) der Rippen (4a) und größer
als die Länge (Sb) der Rippen (4b), wobei die Länge der Rippen (Sa) auf der Vorderseite
des Verbinders größer ist als die Länge (Sb) der Rippen auf der Rückseite des Verbinders.
4. Ein Verbinder gemäß Anspruch 3, dadurch gekennzeichnet, dass an die Enden der äußersten Rippen (4a), auf der Seite, wo die Anschlussklemmen (3)
angeordnet sind, ein Rahmen (4c) angeschlossen ist, der eine quer verlaufende Abschirmung
(7) enthält, die einen integralen Teil des Leitelements (1) bildet, verbunden mit
der Unterseite (8), die die Rippen (4a) am Boden des Verbinders verbindet, wobei die
Unterseite der Abschirmung (7) die Form von miteinander verbundenen Halbkreisen (9)
hat.
5. Ein Verbinder gemäß Anspruch 4, dadurch gekennzeichnet, dass Öffnungen (10) in den Halbkreisen (9) angeordnet sind.
6. Ein Verbinder gemäß Anspruch 1, dadurch gekennzeichnet, dass die Kühlrippen (4a) mit der größeren Länge (Sa) aus unregelmäßigen Elementen bestehen,
die in ihrer Kontur, auf der Vorderseite des Verbinders, eine Form haben, die dem
Querschnitt der Wände eines Kelches (11) ähnlich ist, dessen Unterteil auf der Außenseite
des Kelches von Teilen der parallelen Bodenwände (12) des Kelches umgeben ist, ein
längs verlaufender Abschnitt (13) in der Längsachse des Kelches angeordnet ist und
sich im oberen Teil des Kelches zwischen dem Abschnitt (13) und den Kelchwänden (11)
seitliche Abschnitte (14) befinden, wobei der Boden des Kelches (11) auf der selben
Seite wie die Anschlussklemmen (3) oder auf der anderen Seite des Leitelements (1)
angeordnet sind.
7. Ein Satz von Verbindern zur Montage auf einer Sammelschiene, der mindestens ein Paar
von Ausschaltern (20) enthält, die untereinander mittels eines Polverbinders für Reihenschaltung
elektrisch verbunden sind, in dem die einzelnen Ausschalter (20) Kabelöffnungen haben,
in denen Anschlussklemmen zur Verbindung mit dem Verbinder angeordnet sind und jeder
Ausschalter eine Frontseite mit einer Anzeige "EIN" / "AUS" (22) besitzt sowie eine
Rückseite, die parallel zur Frontseite verläuft, dadurch gekennzeichnet, dass der Verbinder gemäß irgendeinem der Ansprüche 1-6 hergestellt ist und die Rückseite
des Verbinders, der die Kühlrippen (4b) enthält, auf der Rückseite der Ausschalter
angeordnet ist und er Zwischenräume (6) zwischen den Rippen (4b) besitzt, um für den
Fall, dass ein Kurzschluss in den Ausschaltern vorkommt, Gase aus dem Schalter entweichen
zu lassen.
1. Le connecteur polaire pour disjoncteurs en série installés sur une bar omnibus, fait
sous forme d'un élément conducteur en aluminium (1), comprenant les bornes conductrices
(3) et des nervures de refroidissement (4a) d'une longueur (Sa) situées sur la face
avant du connecteur, caractérisée en ce qu'il est muni des nervures de refroidissement supplémentaires (4b) d'une longueur (Sb)
constituant un fragment de l'élément conducteur (1) et lesquelles sont situées sur
la face arrière du connecteur, et la surface extérieure de l'élément conducteur en
aluminium (1) avec les nervures (4a) et (4b), à l'exclusion des bornes conductrices
(3), est couverte électriquement d'une couche isolante (5) faite en matériau en polyamide
d'une conductivité thermique supérieure à 0.2 W/(m·K) et d'une rigidité diélectrique
au moins de 15 kV/mm, ou en matériau en polyuréthane d'une conductivité thermique
supérieure à 0.1 W/(m·K) et d'une rigidité diélectrique au moins de 10 kV/mm, qui
adhère fortement à la surface extérieure de l'élément conducteur (1).
2. Le connecteur selon la revendication 1, caractérisée en ce que les nervures de refroidissement (4b) d'une longueur (Sb) sont groupées en paires
entre lesquelles est créé un espace libre (6) pour la sortie des gaz d'échappement
des interrupteurs individuels, après l'installation des connecteurs sur le lot de
disjoncteurs.
3. Le connecteur selon la revendication 1, caractérisée en ce que les nervures (4a) et (4b) ont la forme des nervures verticales situées parallèlement
les unes aux autres, et leur hauteur (H) est supérieure à la longueur (Sa) des nervures
(4a) et à la longueur (Sb) des nervures (4b), alors que la longueur des nervures (Sa)
côté avant du connecteur est supérieure à la longueur (Sb) des nervures côté arrière
du connecteur.
4. Le connecteur selon la revendication 3, caractérisée en ce qu'aux bouts des nervures terminales (4a), du côté où sont situées les bornes (3), est
connecté un cadre (4c) comprenant une enveloppe transversale (7) constituant une partie
intégrale de l'élément conducteur (1), jointe à la paroi inférieure (8) réunissant
les nervures (4a) du côté bas du connecteur, et la partie inférieure de l'enveloppe
(7) a la forme de deux démi-cercles (9) assemblés l'un à l'autre.
5. Le connecteur selon la revendication 4, caractérisée en ce que dans les demi-cercles (9) sont situées des trous de passage (10).
6. Le connecteur selon la revendication 1, caractérisée en ce que les nervures de refroidissement (4a) de la largeur supérieure (Sa) sont formées des
éléments irréguliers dont les contours, du côté frontal du connecteur, ont la forme
se rapprochant à la section transversale des parois d'un calice (11) dont la partie
inférieure est entourée du côté extérieure du calice par les fragments des parois
parallèles inférieurs (12) du calice, dans l'axe longitudinale du calice est située
une cloison longitudinale (13), et dans la partie supérieure du calice, entre la cloison
(13) et les parois du calice (11) sont situées les cloisons latérales (14), étant
entendu que le dessous du calice (11) est situé du même côté que les bornes (3) de
l'élément conducteur (1) ou du côté opposé.
7. Le lot de disjoncteurs à installer sur la barre omnibus, comprenant au moins une paire
de disjoncteurs (20) réunis ensemble électriquement à l'aide d'un connecteur pour
l'installation des disjoncteurs en série où les disjoncteurs individuels (20) sont
munis d'une orifice de câble dans lesquelles sont installées des bornes à connecter
avec le connecteur, et chacun des disjoncteurs a une face de front avec un commutateur
(22) d'état de fonctionnement "ON" et "OFF" ainsi qu'une face arrière située parallèlement
à la face frontale, caractérisée en ce que le connecteur est fait selon une quelconque des revendications 1 à 6, et la face
arrière du connecteur, comprenant les nervures de refroidissement (4b) est située
côté arrière des disjoncteurs et elle a des espaces libres (6) entre les nervures
(4b), destinés à la sortie des gaz des disjoncteurs en cas de survenance d'un court
circuit dans les disjoncteurs.