CN1187772C - Low-voltage power circuit breaker composing a switching chamber and a displaceable contact unit - Google Patents
Low-voltage power circuit breaker composing a switching chamber and a displaceable contact unit Download PDFInfo
- Publication number
- CN1187772C CN1187772C CNB00812423XA CN00812423A CN1187772C CN 1187772 C CN1187772 C CN 1187772C CN B00812423X A CNB00812423X A CN B00812423XA CN 00812423 A CN00812423 A CN 00812423A CN 1187772 C CN1187772 C CN 1187772C
- Authority
- CN
- China
- Prior art keywords
- contact
- circuit breaker
- supporting
- terminal location
- contact supporting
- 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.)
- Expired - Fee Related
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/04—Contacts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
- H01H1/221—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
- H01H1/226—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member having a plurality of parallel contact bars
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
- H01H1/221—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
- H01H1/226—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member having a plurality of parallel contact bars
- H01H2001/228—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member having a plurality of parallel contact bars with insulating spacers between the contact bars
Landscapes
- Breakers (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention relates to a low-voltage power circuit breaker, comprising a contact unit (5), specifically designed to accommodate contact levers (8), which has receiving bores (12) for a bearing bolt (10) that passes through the contact lever (8). Lateral bearing arms (15) with projecting lugs (16) allow a pivotal displacement of the contact unit (5) for making and breaking contact. Said bearing arms mesh with bearing points (4) of the switching chamber. A lever chain (7) is used to transmit an actuating force from a drive device (6) to the contact unit (5). Bearing means (21) for an articulated bolt (22) are provided on said contact unit to couple the lever chain (7). The contact unit (5) is supported against forces which act in a transverse direction to its pivotal axis by lateral guide surfaces (23). Receiving means (20) for a spring (18) which maintains the final position can also be fitted to the contact unit (5). Said receiving means holds the contact unit (5) under tension in its circuit-breaking final position. The contact unit (5) and its aforementioned features is produced from plastic as a single-piece multi-purpose part. The inventive contact unit (5) is particularly suitable for multi-pole low-voltage power circuit breakers, in which the neighbouring pole lies a short distance away.
Description
Technical field
The present invention relates to a kind of low-voltage circuit breaker, it comprises that a switch-box and one are contained in the contact supporting that is used to settle contact lever in the switch-box pivotally.
Background technology
Be used for the circuit breaker that big rated current has the larger-size contact supporting that has a plurality of parallel contact levers so far, always adopt fabricated structure, one of them body only is used to settle a contact lever, and load onto sidewall or the lever that generally is designed to metalwork with screw or by other modes in the side of these bodies, they allow to be in the contact bearing and turning on the supporting position relevant in the switch-box.
By known this type of the mobilizable contact supporting of DE 3539786 A1.Support arm is the part of supporting bow there, and its size is equipped with the fixedly body of contact lever exactly.Relate to a kind of structure of forming by a plurality of metalworks in this case.Because the supporting of whole here contact conduct electricity, thus between contact supporting and relevant driver the middleware of an insulation of necessary insertion.
Also known mobilizable contact supportings, their support arm is fixed on the central host body, and contact lever (DE 29615566 U1) is installed on this main body.Here, the support arm available metal is made, and the plastics manufacturing that can use insulation by the main body that segmentation is formed of central authorities.Act on the main body because lead toward the lever system of driver, thus when main body is made with ambroin without any need for the middleware of independent insulation.
Although the structure of being made up of a plurality of single members by illustrated known way is simple and practical, can cause bigger width error by adding up of a plurality of single tolerances, that is the thin plate tolerance of both sides and the tolerance of central part.With all have this advantage of suitable manufacture method relative at each member, the contact supporting that needs multiple working procedure to make to be made up of each member may produce error in this process.In addition, when support arm is made with metal or thin plate, and there is high-intensity advantage relative simultaneously, in order to realize voltage transitions to the supporting neck region from contact lever undersized, the measure that may need to add keeps the insulated from each other of circuit breaker consecutive roots, so they have to increase pole span.
Summary of the invention
The technical problem to be solved in the present invention is a kind of low-voltage circuit breaker of design, makes the cost of movable contact supporting significantly reduce the performance of also improving circuit breaker on the whole.
Above-mentioned technical problem solves by a kind of like this low-voltage circuit breaker, it comprises that a switch-box and one are contained in the contact supporting that is used to settle contact lever in the switch-box pivotally, the supporting of this contact has the installing hole of using for the fulcrum post that passes contact lever and is used for the mounting groove of contact force spring and is used for the contact supporting is bearing in the supporting position of switch-box pivotally to make it to transfer to the side support arm of on-position or open position, this contact supporting also has the supporting arrangement that is used for hinge pin, one of being used for contact supporting and circuit breaker of this hinge pin is used to make the contact bearing and turning to couple together to the driver of on-position or open position, according to the present invention, for the skew that limit lateral takes place in gyratory directions, described contact supporting has the side direction guide face that is used for the face mating reaction that matches of killer switch case; And the whole contact supporting with above-mentioned feature is the member that is made into integration by plastics.
Even think that must design thicklyer than metalwork with plastic side support arm is a shortcoming, but an advantage that obtains thus is only there is a tolerance, that is the tolerance of unified plastics body.Also needn't be preserved for securing member, the locus that the screw that for example stretches out is first-class, and because the smooth sidewall of contact supporting, thereby can reach good sealing property in case switching gas passes through in this zone.Importantly, realized connectedly that therewith contact is bearing in the guiding on the switch tank wall, thereby made that the power transverse to the contact bearing and turning direction of motion that may occur is supported when console switch.Therefore support arm is avoided these cross forces or twisting resistance, consequently is very easy to determine the size at support arm and supporting position relevant in the switch tank wall.Improve contact be bearing in guiding obtains in the switch-box outstanding advantage when being short circuit making the resistance of motion littler.This is because the hinge of the lever system that contact supporting plate and its driver are coupled together is subjected to the less crooked load that causes equally, and only bears pulling force and pressure load basically.Therefore, compare the size design that whole drive chain can be more favourable with common so far switching mechanism.
Though the support arm for the contact supporting can be imagined different and design that may all be suitable for the mating reaction at the relevant supporting of switch-box position, but confirmed already within the scope of the invention appropriate to be, support arm has the cylindrical tenon that extends laterally, and is used to insert in the support holes that matches on the switch-box.That is to say that this tenon is specially adapted to the integral design of contact supporting, confirm especially, compare that the needed increase of the diameter dimension of plastics tenon can remain in the scope that an overall size that supports with contact coordinates mutually with the metal tenon.
Further develop by one of the present invention, take following measures significantly to improve circuit breaker, that is, contact is supported with the mount pad that is used for a terminal location-fixing spring.Before the design of further introducing this mount pad and arrangement details, the importance of mentioned this terminal location-fixing spring should be described at first.The purposes of this spring is that part, especially switch spindle with one or more contacts support and are connected with driver are held in its terminal location in off-state with certain trying hard to keep.Therefore terminal location-fixing spring is towards the directive effect that disconnects, so but since its force rate less can with disconnect spring and not obscure, as the sort of disconnection spring that for example needs in the medium-pressure or high pressure circuit breaker at other use fields.So the spring that the terminal location-fixing spring in low-voltage circuit breaker is used to switch on and off than miscellaneous stipulations is much soft.
For example U.S. patent documents 5731560 discloses a kind of driving mechanism that is used for big electric current and big electrodynamic multipolar low-voltage circuit breaker.There, terminal location-fixing spring acts on the switch spindle.This means that all utmost points are pulled to open position.This design is not suitable for the current limiting circuit breaker with one pole disconnection (Einzelpoloeffnung).
Another kind of low-voltage circuit breaker has been described in U.S. patent documents 3832504, and wherein two tension springs act on the transverse arm that connects switch pole with the one end, and are fixed on its other end on the supporting structure of switch.These springs do not allow one pole ground (polweise) to act in each contact supporting.Therefore also be all being loaded extremely jointly here, such as described, consequently be not suitable for current limiting circuit breaker with one pole disconnection.
By mentioned of the present invention the further developing in front, now by in the contact supporting, being provided for the mount pad of terminal location-fixing spring, successfully created such possibility, promptly, terminal location-fixing spring of each utmost point outfit for multipole circuit breaker, and thereby when each utmost point depends on the single disconnection in electric current ground, guarantee that contact supporting and switch spindle location independent ground keep disconnection.
Here, in the contact supporting, make the expense of the mount pad that is used for terminal location-fixing spring and can ignore, because it is the one part of plastics system multifunction piece.
There is a mount pad that is used for the terminal location fixing spring as if just much of that in principle, but still recommends to be provided for the mount pad of second terminal location-fixing spring, and these two mount pads are arranged in the contact supporting symmetrically.The layout of this symmetry is preferred to be realized like this, that is, the mount pad branch is located on the side support arm of contact supporting.
Confirmed already more in this respect that terminal location-fixing spring was designed to helical compression spring, and, for supporting the mounting groove that their set mount pads are designed for an end of terminal location-fixing spring respectively.With for example compare by the tension spring of US 3832504, the advantage of this design is, this terminal location-fixing spring can be used as compression spring and is contained between switch-box rear wall and the contact supporting, and therefore can successfully carry out installation or removal when removing rear wall for maintenance.
The mount pad that top conduct is used for terminal location-fixing spring adopts a bag shape groove, and the mount pad that has same function when using same spring (helical compression spring) also can be designed as mount pin.For the contact supporting being made multifunction piece, do like this and do not have what difference.
Because give regularly when the force-displacement behavior line, the size of terminal location-fixing spring depends on the length and the character of employed spring wire, so may draw the result of external diameter greater than the support arm wall thickness under the situation of appropriate design size.Replace to adopt thicker support arm so that provide supporting for the entire cross section of terminal location-fixing spring, can be by a design of the present invention, make related support arm one groove be arranged a narrow side, this groove has opposed a pair of wall, can fix terminal location-fixing spring that these both sides exceed the wall thickness of support arm with feeling relieved.
As the material of making as the contact supporting of multifunction piece, especially be fit to adopt fibre-reinforced plastics, both can adopt mineral fibres also can adopt organic fiber here.
Description of drawings
For ease of understanding better, further specify the present invention by embodiment preferably illustrated in the accompanying drawings but that do not limit protection range of the present invention below.
Fig. 1 adjoins the partial sectional view of part for the supporting of the contact in the low-voltage circuit breaker switch-box and some.
Fig. 2 installs the contact supporting three-dimensional view that unilateral observation of contact lever obtains in regulation.
Fig. 3 observes the three-dimensional view that the contact supporting obtains at the opposite side that regulation is connected with driver.
Embodiment
The switch-box 1 of the low-voltage circuit breaker of representing among Fig. 1 is made up of rear wall 2 and anterior 3.Rear wall 2 supports in the known manner and is used for the junction curve that circuit breaker is connected with external circuit.In the zone, junction surface between rear wall 2 and anterior 3, a supporting position 4 that is used for supporting pivotally contact supporting 5 is arranged.Driver 6 that schematically illustrates among the figure and the lever system 7 that is connected driver 6 and contact supporting 5 are used to make contact supporting 5 around 4 revolutions of supporting position, so that switch on and off circuit breaker.
Further specify the contact supporting with reference to Fig. 2 and 3 down, because can be than each feature that only more is clear that contact supporting 5 by Fig. 1 by these two figure.
Contact supporting 5 is used to settle contact lever 8 (Fig. 1), the arrangement parallel to each other of quantitatively corresponding with the mensuration electric current of circuit breaker contact lever.Contact lever 8 is supported pin 10 and passes, and for the mounting support pin, establishes installing hole 12 in the side plate 11 of contact supporting 5.Per two contact force springs 13 are pressed on the contact lever 8 and guarantee that being switched on state at circuit breaker has suitable contact force.The contact force spring is fixed in the mounting groove 14 in the contact supporting 5.
Mentioned side plate 11 (towards the direction at supporting position 4) transition downwards is a support arm 15, and the outwardly directed tenon 16 of side direction is arranged on the support arm, is used for inserting supporting position 4.Below contact lever 8 zones, support arm 15 contains the mount pad 17 that is useful on terminal location-fixing spring, can see one of them in Fig. 1.These mount pads 17 are designed for the mounting groove of terminal location-fixing spring 18 (it is designed to helical compression spring) end.Though terminal location-fixing spring 18 has a diameter also bigger than the wall thickness of support arm 15, it still can be fixed in the mount pad 17 with feeling relieved.This point realizes that by a pair of wall 20 of positioned opposite the radius of wall and terminal location-fixing spring 18 are complementary.To the mounting groove lateral openings between the wall 20, so spring can exceed support arm 15, but the power of spring is still in support arm is imported in central authorities at this.
Terminal location-fixing spring 18 with its back to that end bearing of contact supporting on the rear wall 2 of switch-box 1.Therefore, can be when taking off rear wall 2 easily near terminal location-fixing spring 18, so that assembling and dismounting.Although terminal location-fixing spring is in the switch-box, but still can make its avoiding switching effect of arc, because represented baffle plate 19 has blocked switching gas and stoped switching gas (towards the direction at supporting position 4) stream downwards among Fig. 1.
Such as already mentioned, contact supporting 5 is connected with driver 6 by lever system 7.As the member that lever system 7 is connected in the contact supporting 5, contact supporting 5 has the supporting member 21 of two superincumbent bearing insert forms that are shaped in its side that faces driver 6, wherein is useful on the hole that hinge pin shown in Figure 1 22 ends are installed.Lever system 7 available metal spare is generally formed, because contact supports 5 usefulness ambroin manufacturings and guaranteed contact lever 8 (Fig. 1) electric insulation of driver 6 with respect to conduction thus.
As by another important feature of the present invention, contact supporting 5 has side direction guide face 23 (Fig. 2 and 3), face 24 (Fig. 1) mating reaction that matches on they and switch-box 1 wall.Contact supporting size is made multifunctional integrated exactly, the tolerance that guiding face 23 therefore can be very little with match face 24 toward each other.Consequently, the power that supports 5 surface of revolution effects transverse to contact is imported in the wall of switch-box 1 by big area, and the support arm 15 (Fig. 2 and 3) of band tenon 16 is not subjected to these additional loads with relevant supporting position 4.For supports contacts supporting 5 effectively, more advantageously make guiding face 23 and match face 24, that is on side plate 11, the contact lever 8 (Fig. 1) that flows through electric current is arranged between side plate as far as possible away from tenon 16.In Fig. 1, can only see the face 24 that matches of its part, arrange around supporting tenon 16 corresponding to the radius of gyration arc ground of contact supporting 5.
Illustrated design is equally applicable to one pole or multipole circuit breaker.But illustrated contact needle support is to the support design of cross force, under the situation of the closely spaced multipole circuit breaker of adjacent switch case, play particularly advantageous effect, because in these circuit breakers, consecutive roots influence each other is because the power that causes of electric current and clearly showing.
Claims (10)
1. low-voltage circuit breaker, it comprises that a switch-box (1) and one are contained in the contact supporting (5) that is used to settle contact lever (8) in the switch-box (1) pivotally, this contact supporting (5) has:
-installing hole (12) is used to pass the fulcrum post (10) of contact lever (8);
-mounting groove (14) is used for contact force spring (13);
-side support arm (15) is used for contact supporting (5) is bearing in the supporting position (4) of switch-box (1) pivotally, in order that make contact supporting (5) transfer to on-position or open position;
-being used for the supporting arrangement (21) of hinge pin (22), this hinge pin is used for the driver (6) that be used to make contact supporting (5) be turned back to on-position or open position of contact supporting (5) with circuit breaker coupled together,
It is characterized in that:
-for the skew that limit lateral takes place in gyratory directions, described contact supporting (5) has the side direction guide face (23) that is used for the face that matches (24) mating reaction of killer switch case (1); And
-whole contact supporting (5) with above-mentioned feature is the member that is made into integration by plastics.
2. according to the described low-voltage circuit breaker of claim 1, it is characterized in that: described support arm (15) has the cylindrical tenon (16) that extends laterally, and is used to insert in the supporting position (4) that matches on the switch-box.
3. according to the described low-voltage circuit breaker of claim 1, it is characterized in that: have the mount pad (17) that is used for a terminal location-fixing spring (18) in the contact supporting (5).
4. according to the described low-voltage circuit breaker of claim 3, it is characterized in that: establish the mount pad (17) that another is used for a terminal location-fixing spring (18), and these two mount pads (17) are arranged in symmetrically in the contact supporting (5).
5. according to the described low-voltage circuit breaker of claim 4, it is characterized in that: the mount pad (17) of described terminal location-fixing spring (18) is located in the side support arm (15) of contact supporting (5).
6. according to each described low-voltage circuit breaker in the claim 3 to 5, it is characterized in that: described terminal location-fixing spring (18) is designed to helical compression spring, and, for supporting the mounting groove that the set described mount pad (17) of this terminal location-fixing spring (18) is designed for an end of described terminal location-fixing spring (18).
7. according to each described low-voltage circuit breaker in the claim 3 to 5, it is characterized in that: described mount pad is designed to mount pin, is used to insert in the terminal location-fixing spring (18) that is designed to helical compression spring.
8. according to the described low-voltage circuit breaker of claim 6, it is characterized in that: surpass the terminal location-fixing spring (18) of support arm (15) wall thickness in order to use diameter, support arm (15) has a groove a narrow side, it has opposed a pair of wall (20), can feel relieved fixedly both sides exceed the terminal location-fixing spring (18) of the wall thickness of support arm (15).
9. according to the described low-voltage circuit breaker of claim 3, it is characterized in that: one or more terminal location-fixing springs (18) extend between mount pad (17) in the contact supporting (5) and switch-box (1) rear wall (2); And, between the contact lever (8) in terminal location-fixing spring (18) and the contact supporting (5) baffled (24), as the protective device that prevents the switching gas effect.
10. according to the described low-voltage circuit breaker of claim 1, it is characterized in that: described plastics are a kind of fibre-reinforced plastics.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1999148695 DE19948695B4 (en) | 1999-09-30 | 1999-09-30 | Low-voltage circuit breaker with a movable contact carrier with end-position retaining spring |
| DE19948695.6 | 1999-09-30 | ||
| DE19948692.1 | 1999-09-30 | ||
| DE19948692 | 1999-09-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1372692A CN1372692A (en) | 2002-10-02 |
| CN1187772C true CN1187772C (en) | 2005-02-02 |
Family
ID=26055236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB00812423XA Expired - Fee Related CN1187772C (en) | 1999-09-30 | 2000-09-27 | Low-voltage power circuit breaker composing a switching chamber and a displaceable contact unit |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1218898B1 (en) |
| CN (1) | CN1187772C (en) |
| DE (1) | DE50001582D1 (en) |
| HK (1) | HK1046586B (en) |
| WO (1) | WO2001024207A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10048659A1 (en) * | 2000-09-27 | 2002-04-11 | Siemens Ag | Switch contact arrangement of a low-voltage circuit breaker with contact force springs |
| DE10114745A1 (en) * | 2001-03-20 | 2003-01-30 | Siemens Ag | Contact carrier for low-voltage circuit breakers |
| US6570116B2 (en) * | 2001-08-16 | 2003-05-27 | Square D Company | Current carrying assembly for a circuit breaker |
| DE10222011C1 (en) * | 2002-05-17 | 2003-11-20 | Moeller Gmbh | Circuit breakers for high currents and low voltage |
| DE10344652A1 (en) * | 2003-09-25 | 2005-04-28 | Siemens Ag | Low-voltage circuit breaker with radial contact movement by integration of the contact carrier in the switching shaft |
| DE102004020654A1 (en) | 2004-04-22 | 2005-11-10 | Siemens Ag | Switching contact arrangement |
| CN100514525C (en) * | 2007-08-08 | 2009-07-15 | 常熟开关制造有限公司(原常熟开关厂） | Movable contact of circuit breaker |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2552926B1 (en) * | 1983-10-04 | 1985-12-27 | Hager Electro | IMPROVEMENTS ON SWITCHES WITH TILTING CONTACT HOLDER |
| FR2686453B1 (en) * | 1992-01-17 | 1994-04-08 | Legrand | DIFFERENTIAL SWITCH. |
-
2000
- 2000-09-27 EP EP00982938A patent/EP1218898B1/en not_active Expired - Lifetime
- 2000-09-27 DE DE50001582T patent/DE50001582D1/en not_active Expired - Lifetime
- 2000-09-27 WO PCT/DE2000/003433 patent/WO2001024207A1/en active IP Right Grant
- 2000-09-27 CN CNB00812423XA patent/CN1187772C/en not_active Expired - Fee Related
-
2002
- 2002-11-08 HK HK02108099.1A patent/HK1046586B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| HK1046586B (en) | 2005-05-13 |
| WO2001024207A1 (en) | 2001-04-05 |
| EP1218898B1 (en) | 2003-03-26 |
| HK1046586A1 (en) | 2003-01-17 |
| EP1218898A1 (en) | 2002-07-03 |
| DE50001582D1 (en) | 2003-04-30 |
| CN1372692A (en) | 2002-10-02 |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050202 Termination date: 20160927 |