EP0072285A1 - Vorrichtung zum Öffnen von beweglichen Kontakten von Schaltern zum Begrenzen von Kurzschlussströmen - Google Patents

Vorrichtung zum Öffnen von beweglichen Kontakten von Schaltern zum Begrenzen von Kurzschlussströmen Download PDF

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Publication number
EP0072285A1
EP0072285A1 EP82401381A EP82401381A EP0072285A1 EP 0072285 A1 EP0072285 A1 EP 0072285A1 EP 82401381 A EP82401381 A EP 82401381A EP 82401381 A EP82401381 A EP 82401381A EP 0072285 A1 EP0072285 A1 EP 0072285A1
Authority
EP
European Patent Office
Prior art keywords
contact
cage
levers
opposite
parallel
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.)
Granted
Application number
EP82401381A
Other languages
English (en)
French (fr)
Other versions
EP0072285B1 (de
Inventor
Lucien Siffroi
Elie Belbel
André Haury
Christian Blanchard
Michel Lauraire
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.)
Telemecanique SA
Original Assignee
La Telemecanique Electrique SA
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 La Telemecanique Electrique SA filed Critical La Telemecanique Electrique SA
Priority to AT82401381T priority Critical patent/ATE12558T1/de
Publication of EP0072285A1 publication Critical patent/EP0072285A1/de
Application granted granted Critical
Publication of EP0072285B1 publication Critical patent/EP0072285B1/de
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H01H77/10—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening
    • H01H77/102—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening characterised by special mounting of contact arm, allowing blow-off movement
    • H01H77/105—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening characterised by special mounting of contact arm, allowing blow-off movement whereby the blow-off movement unlatches the contact from a contact holder
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/505—Latching devices between operating and release mechanism
    • H01H2071/506—Latching devices between operating and release mechanism using balls or rollers in the latching device

Definitions

  • the invention relates to a device for automatically releasing the mobile contacts of a load cut-off device such as a contactor capable of limiting short-circuit currents and in particular using the electro-dynamic repulsion which appears between conductors of current, in which a movable contact carrier has a longitudinal attachment piece which is integral with a contact bridge subjected to these repulsive forces and which is connected to an operating member of the contactor by means of a coupling at the threshold, this coupling comprising members of convex shape which cooperate transversely with respect to the longitudinal axis, and resiliently with notches to establish a predetermined longitudinal holding force between the bridge and the operating member.
  • a load cut-off device such as a contactor capable of limiting short-circuit currents and in particular using the electro-dynamic repulsion which appears between conductors of current
  • a movable contact carrier has a longitudinal attachment piece which is integral with a contact bridge subjected to these repulsive forces and which is connected to an operating member of the contactor by means
  • a guide is used for the longitudinal attachment piece which is produced in the form of a sliding sleeve around and along the operating member, which gives the coupling large transverse dimensions relative to the useful length of the electrical conductors which must cause electro-dynamic forces of repulsion.
  • this device is placed on the side opposite to the power take-off of the operating member with respect to the contacts, and occupies a large volume which encroaches on the volume of the arc extinguishing chambers usually associated with conductors.
  • the invention therefore proposes to provide a contact release device whose general constitution corresponds to that which is mentioned above but in which measures will be taken on the one hand to reduce the volume of the threshold coupling, and on the other hand to improve fidelity, sensitivity, and speed.
  • a device for actuating the movable contacts 6 - 7 - 8 of an apparatus according to the invention and visible in particular in FIG. 1, comprises a rake 1, which constitutes the device for operating the movable contacts, and for example when it is an integral part of a contactor capable of limiting short-circuit currents, a movable armature 2 belonging to an electromagnet not shown, and intended to operate the contacts.
  • a rake could be controlled by other means, such as a mechanical lock with automatic opening in the event of overload, or possibly with manual control, if the rake controls the contacts of a circuit breaker.
  • a lower region l ′ of this rake and of this armature are associated for example by means of a pin 26 placed transversely with respect to the direction of longitudinal movement F of the armature, the lateral guiding being carried out by means not represented.
  • This rake comprises three identical hollow portions or columns 3 - 4 - 5 linked together in a lower region 1c and each associated with one of the contact systems cutting each of the phases of a polyphase supply line.
  • Each movable contact, 6 - 7 - 8, preferably consisting of a contact bridge, cooperating with two fixed contacts not shown is placed in a particular contact holder 10 - 11 - 12 which is guided in the housing 9 of the apparatus using means not shown in detail, which provide it with a neck direction smoothing F.
  • These contact carriers 10 - 11 - 12 are located at the top of the figure and each have a respective hooking piece 13 - 14 - 15 which is directed towards the bottom of the figure and which enters respectively one of the three hollow portions 3 - 4 - 5.
  • FIGS. 2 and 3 A more detailed view of the rake 1 shows in FIGS. 2 and 3 that each column has a clean housing 16 respectively 17 respectively 18 suitable for receiving coupling devices 21 - 22 - 23 cooperating with the hooking pieces 13 - 14 -15 .
  • Each housing such as 16 is composed of an upper volume such as 19 open at 19 'at the top of the column 3 and of a lower volume such as 20, the coupling devices 21 - 22 - 23 being arranged respectively in each of these lower volumes to cooperate with each of the corresponding attachment parts; a cover 24 closes off the lower volumes of the housings such as 20 which each open into the same chamber 25 open towards the bottom of the figure and receiving, for example, the frame 2 and the pin 26.
  • a coupling device which is in particular visible in FIG. 3 and in FIG. 4, is intended to open to release the attachment piece which is associated with it and thus to allow the corresponding mobile contact to be rapidly expelled towards the top of the figure when the electro-dynamic forces to which it is subjected exceed a certain threshold, so as to limit the intensity of the currents which circulate in the contact bridge, and consequently, in the line concerned.
  • tubular cage 28 of axis XX 'transverse to F, in which are arranged with play two balls 29 - 30 so that when these are in contact with one another parts of their spherical surface 31 respectively 32 opposite are placed outside from the cage;
  • the cage 28 itself has a length m - greater than the thickness n of this blade and an internal diameter which allows rolling and transverse movement of the balls (see FIG. 4);
  • this blade 13 is of rectangular section, with faces 13 '- 13 ", parallel, the second dimension p of its section being several times greater than its thickness n.
  • the three blades 13 - 14 - 15 have their largest faces 13 '- 13 "parallel to a plane SS', passing through the three portions 3 - 4 -5 of the rake, which further improves the volume occupied when the device is used in a polyphase circuit breaker.
  • the coupling device 21 placed in the housing 20 comprises a clamp 33 formed by two opposite pivoting levers 34, respectively 35, which are placed substantially parallel to the plane SS 'and which oscillate around respective transverse pivots 36 - 37 placed parallel to each other and to the plane SS 'and perpendicular to F.
  • pivots are fixed. by their ends 38 - 39 respectively 40 - 41 in two opposite parallel walls 42 - 43 of a prismatic cage 44 formed by a sheet bent in a U whose bottom 45, common to the two walls, is supported on flanges 46 - 47 of the lower volume 20, which limit the latter relative to the upper volume 19, while the outer edges 48 - 49 of these walls directed towards the chamber 25 are in abutment on the cover 24.
  • the bottom 45 of this cage 44 also has an opening 50 which gives passage to the blade 13 and to the ends 51 - 52 of the clamp.
  • the pivots 36 - 37 define on either side of them two first branches 34 '- 35' and two second branches 34 "- 35", the first being oriented towards the upper volume 19 and the second towards the chamber 25.
  • the width of these levers is slightly less than the interior distance separating two walls of the cage to allow their oscillation around the pivots.
  • the first branches 34 '- 35' have opposite ends 51 - 52 which are cambered in a divergent manner, and each comprise between the first end and the pivot an opening or notch 53 - 54, of contour for example circular, while the second branches placed opposite are subjected to opposite forces developed by the same compression spring 55 of transverse axis YY ', which is supported on respective second ends 56 - 57 opposite the first ends to cause a torque of approximation of the first ends 51 - 52.
  • the second ends 56-57 and the spring 55 are placed in an opening 58 of the cover 24; this arrangement which saves space is not limiting, because a thicker cover 59 shown in a variant in FIG. 5 could only have a blind clearance 60 to receive these ends.
  • an insulating plate 61 or more insulating layers are placed between the cover 24 and the frame 2 to provide sufficient isolation between this frame and the metallic parts of the coupling which are or which may be at the same potential as the contact bridge.
  • these forces can be overcome when a determined traction of direction G is applied to the blade 13, and that the clamp 33 is held in position, for example when the armature 2 is attracted against the cylinder head of the electromagnet.
  • the blade 13 When, as a result of the application to the blade of a force coming from the electro-dynamic repulsion communicated in the direction G to the contact bridge, which is greater than a determined threshold, the coupling has been opened, the blade 13 is placed in a position II visible in FIG. 6, which corresponds to the position where the contact bridge has been expelled and for which the surfaces 31 - 32 of the two balls 29 - 30 lie on the one hand against two internal flat surfaces 68 - 69 of the levers which are substantially parallel, and on the other hand, in the vicinity of the edges 70 - 71 which define the origin of the arched ends 51 - 52.
  • Stops 72 - 73 placed opposite and carried by stiffening flanges 74 respectively 75 of the levers, bent at right angles to these surfaces 68 - 69, make it possible to limit the movement of approach of the ends 51 - 52 when the blade n is not engaged in the clamp, as it appears when mounting the device.
  • a fall of the balls cannot therefore occur in this position and a new attachment position can be obtained by operating a relative movement of approach in the opposite direction of G between the blade and the clamp during which the balls first roll on surfaces 68 - 69, then snap into openings 53 - 54.
  • the embodiment of the clamp and of the blade which has just been described, can be used in a switching device of the same general structure, but having different shapes as can be seen in FIGS. 7 and 10.
  • a rake, or operating member 80 which also includes several hollow columns 81 - 82 -83 placed in parallel.
  • a column such as 81 has an internal well 84 having an upper space 85 which opens at 86 at the upper end of this column, an intermediate space 87 and a lower space 88 which opens into a chamber 89, common to several wells column 84 - 91 - 92, see Figure 10; the neighboring lower spaces 88 - 93 - 94 of the three columns are separated by insulating partitions 95 - 96 which stop at the level of the lower space, see also FIG. 9.
  • a clamp 97 similar to the previous clamp 33 is housed in the intermediate space 87 to cooperate with a rectangular blade 98 which is identical to the blade 13 and which passes through the column.
  • the two clamp levers 100 - 103 pivot here again on two parallel pivots 104 - 105 whose fixing of the ends, such as 106 - 107 see Figures 8 and 13, is obtained differently than in the previous case.
  • Each lower space 88 respectively 94 and 93 has on internal surfaces 108 respectively 109 of side walls 110 respectively 111 of the rake, as well as on internal surfaces 112 respectively 113 and 114 - 115 of partitions 95 - 96, pairs of parallel grooves such than 116 - 117, 118 - 119, 120 - 121 and 122 - 123, see Figures 8, 13 and 9.
  • a common insulating cover 130 has in each lower space a prismatic tank such as 128 respectively 129 whose opposite walls parallel to the axis of the well support by their upper edges such as 131-132 see Figure 13, the ends of the pivots.
  • the solid bottom 133 of this insulating cover 130 serves as in the previous case to isolate each coupling device from an armature 134 of an electromagnet which is held in the chamber 89 by a pin 135.
  • the attachment blade 98 has at its upper part 136 two lateral ears 138 - 137 which penetrate into openings 139 - 140 of two parallel metal uprights 141 - 142 to which these ears are attached.
  • These uprights have two other openings 143, respectively 144 which are placed above the previous ones and in the same median plane SS 'to hold a U-shaped magnetic piece 165 having a crosspiece 147 placed in the vicinity of 136, two parallel branches 148 - 149 of which the portions 145 - 146 penetrate into the openings 143 - 144 and a slot 170 placed in a plane NN 'perpendicular to SS'.
  • Upper ends 160 - 161 of the uprights are interconnected by a plastic coupling part 162 and by a transverse key 157, this part 162 advantageously serving to effect the upper guide of the contact carrier and to serve as a stop means against an upper stop surface 164 of the apparatus housing which will determine for example position II.
  • the contact pads 11 - 172 of the bridge 151 are applied to fixed contacts 173 - 174 carried in a known manner by conductors 175 - 176 circulating in part parallel to the contact bridge.
  • the central region 150 is placed in the slot 170 of the magnetic piece 165 so as to cooperate with the latter by electromagnetic means when the contact bridge 151 is crossed by large currents.
  • the blades such as 13 have a flat rectangular section which makes it possible to lighten the mass of a contact carrier as much as possible so that its expulsion by the forces of repulsion is extremely rapid and so that the limitation of the currents which have caused it is effective; it is clear that the use of a blade having a different section, for example square or round would lead to an increase in the mass of the contact carrier and therefore a deterioration in performance without departing from the scope of the invention.
  • the contact release device which has been illustrated in a case where it is used in a contactor capable of limiting short-circuit currents can advantageously be applied to a circuit breaker-limiter having means in place of an electromagnet automatic rake control mechanisms which release the rake upon the appearance of overloads, these mechanical means being able to be armed and rearmed by manual control.
  • a small rake could also be used for each of the phases, which would include a single release device capable of operating independently of the others.
  • One can also use a contact release device comprising a clamp system as described above but fixed in a housing, and a coupling blade secured to a contact carrier, when it is desired to constitute a stage of 'repulsion limit switch which can also be associated with a suitable contactor.
  • the contact release device has to be reset manually, it is possible either to provide a mechanical movement or rake which is equivalent to that communicated by the contactor armature described above, (for example in the case of 'a circuit breaker), either provide at the top of the housing an opening through which external manual means may act in the opposite direction to G on the upper end of the contact carrier, such as part 162, (for example in the case of a switch-limiter stage).

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
EP82401381A 1981-08-12 1982-07-26 Vorrichtung zum Öffnen von beweglichen Kontakten von Schaltern zum Begrenzen von Kurzschlussströmen Expired EP0072285B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82401381T ATE12558T1 (de) 1981-08-12 1982-07-26 Vorrichtung zum oeffnen von beweglichen kontakten von schaltern zum begrenzen von kurzschlussstroemen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8115606 1981-08-12
FR8115606A FR2511542A1 (fr) 1981-08-12 1981-08-12 Dispositif de liberation des contacts mobiles de contacteurs aptes a limiter les courants de courts-circuits

Publications (2)

Publication Number Publication Date
EP0072285A1 true EP0072285A1 (de) 1983-02-16
EP0072285B1 EP0072285B1 (de) 1985-04-03

Family

ID=9261417

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82401381A Expired EP0072285B1 (de) 1981-08-12 1982-07-26 Vorrichtung zum Öffnen von beweglichen Kontakten von Schaltern zum Begrenzen von Kurzschlussströmen

Country Status (9)

Country Link
US (1) US4472698A (de)
EP (1) EP0072285B1 (de)
JP (1) JPS5893133A (de)
AT (1) ATE12558T1 (de)
BR (1) BR8204715A (de)
CA (1) CA1182153A (de)
DE (1) DE3262873D1 (de)
FR (1) FR2511542A1 (de)
IE (1) IE53306B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2559307A1 (fr) * 1984-02-03 1985-08-09 Telemecanique Electrique Contact equipe d'un compensateur magnetique autoliberable a partir d'un seuil de force de compensation, et contacteur-disjoncteur utilisant un tel contact
EP0199668A2 (de) * 1985-04-01 1986-10-29 Siemens Aktiengesellschaft Strombegrenzende Schalteinheit mit einer Kontaktbrückenanordnung
EP0398461A2 (de) * 1989-05-18 1990-11-22 Siemens Aktiengesellschaft Leistungsschalter mit einer Antriebsvorrichtung und einer Verklinkungseinrichtung für einen bewegbaren Schaltkontakt

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2559308B1 (fr) * 1984-02-03 1986-10-17 Telemecanique Electrique Contact equipe d'un compensateur magnetique avec seuil de liberation reglable et contacteur-disjoncteur utilisant un tel contact
US5142259A (en) * 1991-05-16 1992-08-25 General Electric Company Molded case circuit breaker with low friction latch arrangement

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1354577A (fr) * 1962-04-17 1964-03-06 Asea Ab Commutateur limiteur d'intensité ou disjoncteur
FR2124380A1 (de) * 1971-02-02 1972-09-22 Sace Spa Costruzioni Ele
FR2210817A1 (de) * 1972-12-15 1974-07-12 Bbc Brown Boveri & Cie
FR2397712A1 (fr) * 1977-07-13 1979-02-09 Telemecanique Electrique Discontacteur ou interrupteur limiteur d'intensite
FR2399116A1 (fr) * 1977-07-29 1979-02-23 Telemecanique Electrique Interrupteur limiteur de courant

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3209102A (en) * 1963-02-25 1965-09-28 Square D Co Manually and electromagnetically operable latching device
US3990028A (en) * 1974-10-05 1976-11-02 Lucas Industries Limited Multiple circuit thermal circuit breakers
US4317094A (en) * 1980-05-21 1982-02-23 Texas Instruments Incorporated Remotely controlled circuit breaker system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1354577A (fr) * 1962-04-17 1964-03-06 Asea Ab Commutateur limiteur d'intensité ou disjoncteur
FR2124380A1 (de) * 1971-02-02 1972-09-22 Sace Spa Costruzioni Ele
FR2210817A1 (de) * 1972-12-15 1974-07-12 Bbc Brown Boveri & Cie
FR2397712A1 (fr) * 1977-07-13 1979-02-09 Telemecanique Electrique Discontacteur ou interrupteur limiteur d'intensite
FR2399116A1 (fr) * 1977-07-29 1979-02-23 Telemecanique Electrique Interrupteur limiteur de courant

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2559307A1 (fr) * 1984-02-03 1985-08-09 Telemecanique Electrique Contact equipe d'un compensateur magnetique autoliberable a partir d'un seuil de force de compensation, et contacteur-disjoncteur utilisant un tel contact
EP0199668A2 (de) * 1985-04-01 1986-10-29 Siemens Aktiengesellschaft Strombegrenzende Schalteinheit mit einer Kontaktbrückenanordnung
EP0199668A3 (en) * 1985-04-01 1988-06-01 Siemens Aktiengesellschaft Berlin Und Munchen Current limiting switch unit with a contact bridge assembly
EP0398461A2 (de) * 1989-05-18 1990-11-22 Siemens Aktiengesellschaft Leistungsschalter mit einer Antriebsvorrichtung und einer Verklinkungseinrichtung für einen bewegbaren Schaltkontakt
EP0398461A3 (de) * 1989-05-18 1992-02-26 Siemens Aktiengesellschaft Leistungsschalter mit einer Antriebsvorrichtung und einer Verklinkungseinrichtung für einen bewegbaren Schaltkontakt

Also Published As

Publication number Publication date
JPH0136653B2 (de) 1989-08-01
IE53306B1 (en) 1988-10-12
BR8204715A (pt) 1983-08-02
JPS5893133A (ja) 1983-06-02
IE821853L (en) 1983-02-12
FR2511542B1 (de) 1983-12-02
CA1182153A (fr) 1985-02-05
ATE12558T1 (de) 1985-04-15
FR2511542A1 (fr) 1983-02-18
US4472698A (en) 1984-09-18
EP0072285B1 (de) 1985-04-03
DE3262873D1 (en) 1985-05-09

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