EP2573786A1 - Commutateur de puissance doté d'une stabilisation de boîtier optimisée, notamment à puissances de commutation élevées - Google Patents

Commutateur de puissance doté d'une stabilisation de boîtier optimisée, notamment à puissances de commutation élevées Download PDF

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Publication number
EP2573786A1
EP2573786A1 EP11182090A EP11182090A EP2573786A1 EP 2573786 A1 EP2573786 A1 EP 2573786A1 EP 11182090 A EP11182090 A EP 11182090A EP 11182090 A EP11182090 A EP 11182090A EP 2573786 A1 EP2573786 A1 EP 2573786A1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
housing
stabilizing element
breaker according
stabilizing
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
EP11182090A
Other languages
German (de)
English (en)
Other versions
EP2573786B1 (fr
Inventor
Alexander Spies
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to EP11182090.8A priority Critical patent/EP2573786B1/fr
Publication of EP2573786A1 publication Critical patent/EP2573786A1/fr
Application granted granted Critical
Publication of EP2573786B1 publication Critical patent/EP2573786B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/0207—Mounting or assembling the different parts of the circuit breaker
    • 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
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/025—Constructional details of housings or casings not concerning the mounting or assembly of the different internal parts
    • H01H71/0257—Strength considerations
    • 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
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/0207—Mounting or assembling the different parts of the circuit breaker
    • H01H2071/0242—Assembling parts of a circuit breaker by using snap mounting techniques
    • 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
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/0207—Mounting or assembling the different parts of the circuit breaker
    • H01H71/0235—Contacts and the arc extinguishing space inside individual separate cases, which are positioned inside the housing of the circuit breaker

Definitions

  • the invention relates to a circuit breaker having a first switching device area, in which a quenching chamber device and a contact slide device are arranged with movable contact pieces which are positioned opposite to Festschalt Georgiaen, and a second switching device area in which a trip group of a short-circuit release and an overload release are arranged.
  • Circuit-breakers in particular low-voltage circuit breakers, are electromagnetic self-switches in the event of a short circuit. Their operation corresponds in principle to the operation of circuit breakers. They are usually equipped with a thermal and a magnetic release and thus have the same structural elements as circuit breakers. However, they are designed for larger rated currents, in addition, the triggers of circuit breakers, unlike the circuit breaker, sometimes separately adjustable. In the low voltage range, the switches are also used as motor protection switches.
  • the task of the circuit breaker is to protect downstream systems, in particular three-phase motors against damage due to overload or short circuit.
  • the circuit breaker should switch off these currents in conjunction with the network protection devices. If there is gas between the two poles, it will be ionized by the flashover with a correspondingly high voltage difference between the poles, forming a self-sustaining gas discharge, also known as an arc. This plasma not only continues to conduct power, but also reduces the life of the device, and at high currents it can even destroy the switch.
  • disconnectors are circuit breakers designed so that the arcing occurring when opening the switch contacts deleted quickly and without damaging the switch and thus the flow of current is interrupted.
  • a particular problem with circuit breakers with high switching capacity, in particular up to 100 kA at rated currents up to 80 A is that with such large short circuits, the load on the chamber walls, that is, especially on the lower part of the circuit breaker due to the large pressure development very high is.
  • the housing walls may bend outwards in such tripping operations or lead to a tear in the upper part of the circuit breaker. In the worst case, parts of the shell are broken off.
  • this electrical circuit breaker is provided to glue the preassembled contact and connection parts of the trip unit in the housing or a housing part, so that the attachment of these preassembled contact and connecting parts in the housing takes place without additional connection.
  • adhesive pockets are present on the housing, which are filled with adhesive material. In this adhesive pockets protrude pins of the trip unit, which are glued in the adhesive pockets.
  • the permanent adhesive connection keeps the bimetallic position stable. Thermal and mechanical stresses are significantly reduced by the use of the adhesive and by bonding, while the heat and dimensional stability is ensured.
  • the object of the present invention is to provide a circuit breaker, which has stable housing walls even at high switching performance and thereby offers easy installation handling.
  • this object is achieved by a circuit breaker having a first switching device area, in which a quenching chamber device and a contact slide device are arranged with movable contact pieces, which are positioned opposite to Festschalt Georgiaen, and a second switching device area in which a trip group of a short-circuit release and an overload release are arranged ,
  • the invention is characterized in that the fixed contact pieces are mounted on at least one of the housing stabilization in the event of triggering serving stabilization element.
  • the housing walls of the switching chambers of the circuit breaker are kept at a distance by the stabilizing element according to the invention.
  • the stabilizing element is designed in particular as a bolt and is preferably screwed in the last assembly step to the first switching device area.
  • opposite outer walls of the circuit breaker support each other in the event of a short circuit.
  • the stabilizing element according to the invention is designed such that it is fitted in the intermediate walls of the first and second switching device area to the required air and To ensure creepage distances. As a result, the intermediate walls are stabilized at the same time.
  • the stabilization elements in particular the bolts, are plugged or clipped onto the fixed contact pieces and the release assembly. Thereafter, the assembly takes place in the second switching device area. Corresponding counter contours ensure a secure hold. The second switching device area is then placed on the first switching device area.
  • the stabilizing elements put here in corresponding fixation structures. At the same time, these fixing structures serve to maintain air and creepage distances.
  • the stabilizing elements, in particular bolts are fixed from the outside on both sides with a screw to the first switching device area.
  • the stabilizing element according to the invention is preferably made of plastic, in particular of PA66.
  • the stabilizing element preferably has three subregions arranged side by side. Each subregion comprises two mutually parallel aligned guide surfaces, on each of which two oppositely arranged lugs are located.
  • fixing structures are provided in each case between the subregions of the stabilizing element according to the invention.
  • the fixing structures are U-shaped with two parallel legs and a leg connecting the transition region. These fixing structures engage in housing structures of the circuit breaker and ensure that the housing walls are fixed in position stable in the event of tripping.
  • the stabilizing element according to the invention in particular for a circuit breaker, is supported on the intermediate and outer ⁇ -walls of the lower part.
  • the wall deflection of the lower part and thus also of the upper part is thereby reduced.
  • it is provided to fix the contact pieces on the stabilizing element, which in turn is then and lower part is fitted.
  • the assembly is unambiguous and assemblies oriented.
  • the convective cooling channel is made possible for cooling the flow path.
  • the stabilizing element according to the invention is preferably made of plastic, in particular PA66.
  • the assembly envisages clipping on the stabilizing elements, the Festschalt publishede and the trigger assembly. Then the assembly takes place in the upper part. Corresponding counter contours ensure a secure hold. The entire upper part is then placed on the lower part.
  • the two stabilizing elements lie here in corresponding counter contours of the housing. These serve at the same time to maintain the clearances and creepage distances.
  • the stabilizing elements are then fixed from the outside on both sides, preferably with a screw to the lower part.
  • Fig. 1 shows a stabilizing element according to the invention 1, which is preferably divided into three juxtaposed sub-areas 2, 3, 4, wherein each portion 2, 3, 4 each have two opposing guide surfaces 5, 6 and the two guide surfaces 5, 6 interconnecting bottom 7 , At the guide surfaces 5, 6 a protruding nose 8 is arranged in each case.
  • the lugs 8 on the guide surfaces 5, 6 are arranged opposite one another.
  • fixing structures 9 are arranged, which are designed such that they engage position stable in housing structures of the circuit breaker.
  • the fixing structures 9 are preferably U-shaped with two mutually parallel legs 10, 11 and a transition region 12.
  • the stabilizing element 1 may preferably be fastened by screws to the housing of the circuit breaker.
  • the stabilizing element 1 is preferably made of plastic, in particular PA66.
  • Fig. 2 is the stabilizing element 1 before ( Fig. 2 right) and after ( Fig. 2 on the left) of the mounting on a locking piece 14, which is preferably U-shaped, with two legs 15, 16 arranged parallel to one another and a transition area 17.
  • Fig. 2 right is the leg 15 of the Festschalt Swisss 14 below the stabilizing element 1 and the second leg 16 above the lugs 8 on the guide surfaces 5, 6 of the stabilizing element 1.
  • the second leg 16 of the Festschalt Industriess 14 is clamped below the nose 8 of the stabilizing element 1.
  • Out Fig. 3 the mounting state before the jamming of the leg 16 below the nose 8 of the stabilizing element 1 shows.
  • FIG. 4 the stabilizing element 1 is shown with attached Festschalt Glaen 14 and tripping assembly 18.
  • Fig. 5 is the assembly of stabilizing element 1, Festschalt Swissen 14 and trigger assembly 18 of Fig. 4 mounted in the housing of the second switching device area, that is, the upper part 19 of the circuit breaker shown.
  • the legs 10, 11 of the fixing structure 9 of the stabilizing element 1 which are arranged between the sub-areas 2 and 3 and 3 and 4, engage in counter-contours 20 provided for this purpose for the housing of the upper part 19 of the circuit breaker.
  • Fig. 6 the counter contour 20 for the fixing structure 9 on the stabilizing element 1 is shown enlarged.
  • Fig. 7 shows the stabilizing element 1 plugged onto the first switching device area, that is, on the lower part 21 of the circuit breaker.
  • Out Fig. 7 shows that the counter contours 22 are provided in the housing of the lower part 21, which comprise the fixing structure 9 of the stabilizing element 1.
  • the mating contours 22 of the lower part 21 are formed tightly against the legs 10, 11 of the fixing structure 9. The fixing structure 9 thus engages in a groove of the housing of the lower part 21st
  • Fig. 8 shows the position of the stabilizing element 1, when it is installed in a circuit breaker, which is formed from an upper part 19 and a lower part 21.
  • the stabilizing elements 1 can be fixed from the outside on both sides of the lower part 21.
  • the stabilizing element according to the invention in particular for a circuit breaker, is supported on the intermediate and outer ⁇ -walls of the lower part.
  • the wall deflection of the lower part and thus also of the upper part is thereby reduced.
  • it is provided to fix the switching pieces on the stabilizing element, which is then in turn fitted in the upper and lower part.
  • the assembly is unambiguous and assemblies oriented. It is also advantageous that the convective cooling channel is made possible for cooling the flow path. Although the order of assembly must be changed, however, the walls of the lower part are advantageously aligned with one another by the impressions of the stabilizing element.
  • the height dimension of the fixed switching pieces is adjusted by the clamping acting stabilizing element with great accuracy.
  • the two legs of the Festschalt may be kept apart. In addition, air and creepage distances between the chambers and outward are maintained.
  • the stabilizing element is preferably made of plastic, in particular PA66.
  • the assembly envisages clipping on the stabilizing elements, the Festschalt publishede and the trigger assembly. Then the assembly takes place in the upper part. Corresponding counter contours ensure a secure hold. The entire top is then on the Lower part attached.
  • the two stabilizing elements lie here in corresponding counter contours of the housing. These serve at the same time to maintain the clearances and creepage distances.
  • the stabilizing elements are then fixed from the outside on both sides, preferably with a screw to the lower part.

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EP11182090.8A 2011-09-21 2011-09-21 Commutateur de puissance doté d'une stabilisation de boîtier optimisée, notamment à puissances de commutation élevées Not-in-force EP2573786B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11182090.8A EP2573786B1 (fr) 2011-09-21 2011-09-21 Commutateur de puissance doté d'une stabilisation de boîtier optimisée, notamment à puissances de commutation élevées

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11182090.8A EP2573786B1 (fr) 2011-09-21 2011-09-21 Commutateur de puissance doté d'une stabilisation de boîtier optimisée, notamment à puissances de commutation élevées

Publications (2)

Publication Number Publication Date
EP2573786A1 true EP2573786A1 (fr) 2013-03-27
EP2573786B1 EP2573786B1 (fr) 2016-08-03

Family

ID=44651464

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11182090.8A Not-in-force EP2573786B1 (fr) 2011-09-21 2011-09-21 Commutateur de puissance doté d'une stabilisation de boîtier optimisée, notamment à puissances de commutation élevées

Country Status (1)

Country Link
EP (1) EP2573786B1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01286226A (ja) * 1988-05-12 1989-11-17 Matsushita Electric Works Ltd 回路しや断器
JPH0512975A (ja) * 1991-06-28 1993-01-22 Fuji Electric Co Ltd 回路遮断器
EP0903762A2 (fr) * 1997-09-23 1999-03-24 Siemens Energy & Automation, Inc. Boítier à éléments multiples pour disjoncteur
WO2001033595A1 (fr) 1999-10-29 2001-05-10 Moeller Gmbh Disjoncteur electrique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01286226A (ja) * 1988-05-12 1989-11-17 Matsushita Electric Works Ltd 回路しや断器
JPH0512975A (ja) * 1991-06-28 1993-01-22 Fuji Electric Co Ltd 回路遮断器
EP0903762A2 (fr) * 1997-09-23 1999-03-24 Siemens Energy & Automation, Inc. Boítier à éléments multiples pour disjoncteur
WO2001033595A1 (fr) 1999-10-29 2001-05-10 Moeller Gmbh Disjoncteur electrique

Also Published As

Publication number Publication date
EP2573786B1 (fr) 2016-08-03

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