CN102243950A - Thermal actuator - Google Patents
Thermal actuator Download PDFInfo
- Publication number
- CN102243950A CN102243950A CN2010102004278A CN201010200427A CN102243950A CN 102243950 A CN102243950 A CN 102243950A CN 2010102004278 A CN2010102004278 A CN 2010102004278A CN 201010200427 A CN201010200427 A CN 201010200427A CN 102243950 A CN102243950 A CN 102243950A
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- Prior art keywords
- electric current
- strap
- movable
- conductor
- contact
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- 239000004020 conductor Substances 0.000 claims abstract description 45
- 238000009434 installation Methods 0.000 claims abstract description 17
- 238000009795 derivation Methods 0.000 claims description 6
- 230000003287 optical effect Effects 0.000 abstract 1
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- 238000010891 electric arc Methods 0.000 description 8
- 230000004048 modification Effects 0.000 description 7
- 238000012986 modification Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 6
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- 238000005859 coupling reaction Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 240000004859 Gamochaeta purpurea Species 0.000 description 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
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- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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- 238000012856 packing Methods 0.000 description 1
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Images
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
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/14—Electrothermal mechanisms
- H01H71/16—Electrothermal mechanisms with bimetal element
- H01H71/164—Heating elements
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- 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
- H01H71/1081—Modifications for selective or back-up protection; Correlation between feeder and branch 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
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/14—Electrothermal mechanisms
- H01H71/16—Electrothermal mechanisms with bimetal element
- H01H2071/167—Multiple bimetals working in parallel together, e.g. laminated together
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- 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
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/40—Combined electrothermal and electromagnetic mechanisms
Landscapes
- Breakers (AREA)
- Thermally Actuated Switches (AREA)
Abstract
The presen invention relates to a thermal actuator for an electric installation switch device, in particular a line protecting switch. The thermal actuator comprises an optical thermal bimatal strip with one side clamped on a clamping point, which bends due to temperature rise under a current exceeding a rated current, and a swiching lock is operated through a free end thereof, so that contact portions formed by the fixed and movable contacts can be opened. On the bimetallic strip is a first current guide portion arranged between the clamping point and the free end of the bimetallic strip. At the first current guide portion is a conductor plate attached, which extends from the first current guide portion towards the free end of the bimetallic strip and is spaced from the bimetallic strip. A second current guide portion is arranged on an end porton opposite to the first current guide portion of the conductor plate. At the second current guide portion, a movable conductor is connected to the second current guide portion and connects a movable or fixed contact with the second current guide portion.
Description
Technical field
The present invention relates to a kind of according to claim 1 as described in the preamble, be used for electric installation switchgear
Especially the thermal circuit beraker of line protection switch (Leitungsschutzschalter)
This thermal circuit beraker comprises being pressed on unilaterally and compresses that position (Einspannstelle) is located, as to have electric current supply position (Stromzuf ü hrungsstelle) preferred thermo bimetal's strap (Thermobimetallstreifen) that this thermo bimetal's strap is surpassing under the electric current of rated current owing to heat up
And crooked (ausbiegen) and can utilize its free end to come master cock lock (Schaltschloss), thereby make that the contact site (Kontaktstelle) that is formed by a fixing contact (Kontaktst ü ck) and a movable contact can be opened.
The invention still further relates to a kind of as described in the preamble electric installation switchgear according to claim 3, this electric installation switchgear comprises the contact site that is formed by a contact of fixing and a movable contact, comprise thermal circuit beraker, this thermal circuit beraker has and is pressed on the preferred thermo bimetal's strap that compresses the position unilaterally, this thermo bimetal's strap surpass under the electric current of rated current crooked and can utilize its free end to come the master cock lock owing to heat up, thereby make that the contact site can be opened.
Background technology
The thermal circuit beraker of the type is as direct-heating type or indirect heating type circuit breaker and known.Pine for directly adding, electric current flows through and flows into position and electric current at electric current and flow out thermo bimetal's strap between the position.Be used to make the heat bimetallic strip bending tablet at this electric current heat that in thermo bimetal's strap, produces.Flowing out at electric current has movable conductor (Leiter) the normal binding of position, this movable conductor electric current is flowed out that the position is connected with the contact that fix or movable of contact site and thus under the situation of the contact site of closure with current path (Strompfad) closure.Directly heating mechanically can realize easily.
In indirect, electric current flows through and is arranged near the conductor of thermo bimetal's strap.The heat of this conductor is delivered on thermo bimetal's strap by radiation, heat conduction or convection current and heats this thermo bimetal's strap thus indirectly.Indirect is everlasting and is employed under the high rated current.Because under the current strength that raises, under direct-fired situation, must use and have the less unit impedance and the bimetallic of thermal flexure, reduce heated length and increase bimetallic cross-sectional area, so that under the situation of keeping certain switching loss power or temperature rise, guarantee the function of thermal circuit beraker.Temperature rise and crooked tolerances to bimetal release increase therefrom.Along with the increase of cross-sectional area, the bimetallic volume and thus metal consumption unnecessarily increase, yet simultaneously, to the matching variation of the power-displacement-demand (Kraft-Weg-Bedarf) of switching device.Therefore, under the situation of big rated current intensity, recommend indirect, in indirect,, can be complementary with the bimetallic that is optimally mated to the heat input of bimetallic strap by conductor and the design of the thermal coupling between thermo bimetal's strap in energising.Yet indirect is mechanically complicated, because must guarantee, being in operation to the heat transferred of bimetallic strap does not change.
Summary of the invention
The objective of the invention is to, create a kind of the above-mentioned type, that be used for big rated current (being preferably 100A or higher), as to have the high precision that opens circuit, little loss power and simple low-cost configuration thermal circuit beraker.
Another object of the present invention is to, create electric installation switchgear, especially main line protection switch a kind of the above-mentioned type, that can be applied to very high rated current (preferred 100A or higher).
According to the present invention, aspect thermal circuit beraker, this purpose realizes by the feature of claim 1.
Aspect installation switchgear, realize as the purpose on basis of the present invention feature by claim 3.
So, according to the present invention, be at the bimetallic strap and be furnished with first electric current between the free end that compresses position and bimetallic strap and derive position (Stromabf ü hrungsstelle), derive position at this first electric current and link conductor plate (Leiterblech) is arranged, this conductor plate is derived the position and is being stretched on the direction of the free end of bimetallic strap and spaced apart with the bimetallic strap from first electric current.In addition, be furnished with second electric current at the place, end relative of conductor plate and derive the position with first electric current derivation position, and deriving the position binding at second electric current has movable conductor, and this movable conductor is derived the position with second electric current and is connected with movable or fixing contact.
The invention has the advantages that, realized the direct and indirect heating of part of part of thermo bimetal's strap thus.Thermal circuit beraker according to the present invention combines direct-fired about the advantage of simple mechanical structure and the advantage about the applicability under very high rated current (preferred 100A or higher) of indirect.
Direct-fired zone stretches from electric current supply position and derives the position up to first electric current.This zone can for example be thermo bimetal's strap total length pact half or 1/3rd.Derive the position from first electric current, near the conductor plate of electric current being arranged in thermo bimetal's strap through, this conductor plate is heated up and the second area of thermo bimetal's strap is heated up.Therefore, advantageously, with respect to the variant (Version) under the situation of low rated current intensity, the total length of thermo bimetal's strap and cross section do not change.Therefore, can be direct-heating type modification (it has low rated current) and dual heating type modification (this dual heating type modification is used for very high rated current (100A or higher)) and use thermo bimetal's strap of same type.
Yet direct-fired district reduces for complete direct-heating type modification to some extent.
On the other hand, be whole length on indirectly the heating thermo bimetal's strap in compare, mechanical structure is simpler.In the following way, that is, cause that the conductor plate of indirect only heats the free end of thermo bimetal's strap, then, equally only in the district at this place, have extra mechanical part.With respect to complete direct-heating type modification (those) as in file DE 10 2,008,017 472 A1, showing, do not produce the bigger space requirement that is used for thermo bimetal's strap, and, manufacture process (just, component of thermo bimetal packing into to the equipment) same with direct heating modification in as broad as long and can carry out identically.
The material behavior of visual employed thermo bimetal's strap and geometry designs are selected and different, more close or further from compressing the position in the optimum position that is used for first electric current and derives the installation at position.Yet by test or simulation, it is obtained that this location point can need not the mode of high cost.
According to a kind of favourable form of implementation of the present invention, deriving the position binding at second electric current has two movable conductors that extend parallel to each other, and they are derived the position with second electric current and are connected with movable or fixing contact.Also has high current carrying capacity when therefore, being connected between second electric current derivation position and movable or fixing contact has good mobility.
Installation switchgear according to the present invention is characterised in that, be at the bimetallic strap and be furnished with first electric current between the free end that compresses position and bimetallic strap and derive the position, derive the position binding at first electric current conductor plate is arranged, this conductor plate is derived the position and is being stretched on the direction of the free end of bimetallic strap and spaced apart with the bimetallic strap from first electric current, at conductor plate, derive relative place, end, position with first electric current and be furnished with second electric current derivation position, and, deriving the position binding at second electric current has movable conductor, and this movable conductor is derived the position with second electric current and is connected with movable or fixing contact.
Installation switchgear according to another advantageous forms of implementation of the present invention has arc-control device and control bus (Leitschiene), this control bus is guided switching arc into arc-control device, wherein, in movable contact place binding movable conductor is arranged, this movable conductor is connected movable contact with the control bus.The advantageous effects of this form of implementation is, has produced extra arc blow-out loop (Blasschleife), eliminates electric arc when open in the contact site in this arc blow-out loop.In addition, the commutation voltage that electric arc must overcome from movable contact commutation to pairing control bus the time is fallen (Kommutier-Spannungsabfall) and is reduced, and thus, electric arc commutates on the control bus quickly and arc extinction is accelerated by this mode.
Other favourable design of the present invention is by obtaining in the dependent claims.
Description of drawings
By means of the accompanying drawing that has shown embodiments of the invention therein, the present invention and other favourable design and improvement project and other advantage will be set forth further and be illustrated.Wherein:
Fig. 1 schematically shown have according to thermal trip of the present invention according to installation switchgear of the present invention.
Fig. 2 shown according to another form of implementation according to thermal trip of the present invention.
Identical in the accompanying drawings or act on identical member or parts will identify with identical Reference numeral.
Reference numerals list
1 electric installation switchgear
2 housings
3 first binding posts (Anschlussklemme)
4 second binding posts
5 main thermo bimetals
6 fixing contacts
7 movable contacts
8 magnetic circuit breakers
9 contact bar (Kontakthebel)
10 rotations
11 handle projection
12 switching mechanisms
13 first positions
14 second positions
15 the 3rd positions
16 first control buses
17 second control buses
18 arc-control devices
19 compress the position
20 current bus bars
21 conductor plates
22 fastening limit legs
23 edge legs
24 heat are transmitted the limit leg
25,25 ' twisted wire
26 second twisted wires
27 first electric currents are derived the position
28 second electric currents are derived the position
29 contact holders
Concrete form of implementation
Fig. 1 is schematically showing installation switchgear 1 in the diagram, and this installation switchgear 1 has housing 2.Yet, in Fig. 1, do not show all constituents of installation switchgear, assembly and parts, but only shown for elaboration of the present invention (relating to the thermal circuit beraker assembly) necessary those.
Between first binding post 3 and second binding post 4, main current path extends through the thermal circuit beraker that has main thermo bimetal's strap 5, the contact site that forms between fixing and movable contact 6,7, and magnetic circuit breaker 8.This movable contact is positioned at contact bar 9 places, and this contact bar 9 is supported swingably at rotation 10 places.
By handling projection 11, main thermo bimetal's strap 5 can (illustrate by first position 13) affacting under the bending relevant with heat on the switching mechanism 12, thereby make that switching mechanism 12 affacts on the contact bar 9 and makes these contact bar 9 edges open direction (herein for counterclockwise) along second position 14 subsequently and swings.
For also mandatory declaration for the purpose of the integrality, under big short circuit current, magnetic circuit breaker 8 by 15 same purposes of the 3rd position on contact bar 9 so that this contact bar 9 swing towards open position.
Under the situation that this class by means of magnetic circuit breaker of contact site is opened fast, at fixing and movable contact 6, produce switching arc between 7, this switching arc commutates to first and second electric arcs control bus 16, on 17 and by from this first and second electric arc control bus 16,17 guide arc-control device 18 into, and this arc-control device 18 often comprises the layout that is the arc extinguishing board that a determining deviation ground stacks each other each other.
Main thermo bimetal's strap 5 is pressed on unilaterally and compresses 19 places, position.At this place, main thermo bimetal's strap 5 is connected with current bus bar 20, for example welding mutually, and this current bus bar 20 has been set up to the connection of first binding post 3.
The free end place that transmits strap 24 in heat is fixed with the movable conductor that is twisted wire 25 forms by means of pad, its second end is welded in contact bar 9 places at the contact holder place of movable contact 7 or movable contact.Pad is also referred to as second electric current and derives position 28.
Second twisted wire 26 is connected contact bar 9 with second electric arc control bus.
Main thermo bimetal's strap 5 directly is heated in its first 1/3rd (compressing the position 19 and first electric current derives between the position 27), and then is heated indirectly by conductor plate 21 then.Design on main thermo bimetal's strap is decided, and the position at first electric current derivation position 27 can be positioned at other position on main thermo bimetal's strap 5 equally.
Fig. 2 has shown thermal circuit beraker assembly as described above, this thermal circuit beraker assembly can be used as can be prefabricated assembly construct compactly and be presented in the line protection switch (for example be presented to as at the optionally main line protection switch as shown in file DE 10 2,008,017 472 A1) having with having little space requirement under the situation of repertoire.
In this modification that in Fig. 2, shows, be parallel to twisted wire 25 ground, derive at second electric current between the contact holder 29 of position 28 and movable contact 7 and be provided with another twisted wire 25 ', so that in the flexibility that keeps this connection, further improve current carrying capacity, thus, movable contact and expedite motion main thermo bimetal's strap have been guaranteed.
Thus, the main current path that has thermal circuit beraker, contact site and magnetic circuit breaker that shows among the figure is corresponding to as in the main current path as shown in file DE 10 2,008 017 2472 A1.In addition, in file DE 10 2,008 017 472 A1 that mention, other structural detail and functional unit have been described also, especially have the secondary current path of selectivity resistance, selective thermal bimetallic and secondary contact site, and described the interaction (selective rhizotomy that is used for the external circuit that linked) of this secondary current path and main current path.
At this, the present invention also comprises the combination arbitrarily of preferred implementing form and each design feature or improvement project, as long as they do not repel mutually.
Claims (4)
1. thermal circuit beraker, be used for electric installation switchgear (1), especially line protection switch, this thermal circuit beraker has to be pressed on unilaterally and compresses the preferred thermo bimetal's strap (5) that has electric current supply position that position (19) locates, this thermo bimetal's strap (5) surpass under the electric current of rated current crooked and can utilize its free end (11) to come master cock lock (12) owing to heat up, thereby make, by fixing and movable contact (6,7) contact site of Xing Chenging can be opened, it is characterized in that, locate at bimetallic strap (5), between the described free end that compresses position (19) and described bimetallic strap (5), be furnished with first electric current and derive position (27); Derive position (27) at described first electric current and locate to link conductor plate (21) is arranged, this conductor plate (21) is derived position (27) and is being stretched on the direction of the free end of described bimetallic strap (5) and spaced apart with described bimetallic strap (5) from described first electric current; Be furnished with second electric current at the place, end relative of conductor plate (21) and derive position (28) with described first electric current derivation position (27), and, deriving position (28) at described second electric current locates to link movable conductor (25 is arranged, 25 '), described movable conductor (25,25 ') is derived position (28) with described second electric current and is connected with movable or fixing contact (7).
2. thermal circuit beraker according to claim 1, it is characterized in that, derive position (28) at described second electric current and locate to link the movable conductor (25 that has two to extend parallel to each other, 25 '), described movable conductor (25,25 ') is derived position (28) with described second electric current and is connected with movable or fixing contact (7).
3. an electric installation switchgear (1), have by fixing and movable contact (6,7) contact site of Xing Chenging, have thermal circuit beraker, described thermal circuit beraker has to be pressed on unilaterally and compresses preferred thermo bimetal's strap (5) that position (19) is located, this thermo bimetal's strap (5) surpass under the electric current of rated current crooked and can utilize its free end (11) to come master cock lock (12) owing to heat up, thereby make, described contact site can be opened, it is characterized in that, locate at bimetallic strap (5), between the described free end that compresses position (19) and described bimetallic strap (5), be furnished with first electric current and derive position (27); Derive position (27) at described first electric current and locate to link conductor plate (21) is arranged, this conductor plate (21) is derived position (27) and is being stretched on the direction of the free end of described bimetallic strap (5) and spaced apart with described bimetallic strap (5) from described first electric current; Be furnished with second electric current at the place, end relative of described conductor plate (21) and derive position (28) with described first electric current derivation position (27), and, deriving position (28) at described second electric current locates to link movable conductor (25 is arranged, 25 '), described movable conductor (25,25 ') is derived position (28) with described second electric current and is connected with movable or fixing contact (7).
4. electric installation switchgear according to claim 3 (1), have arc-control device (18) and have control bus (17), this control bus (17) is guided switching arc into described arc-control device (18), wherein, locating to link at movable contact (7) has movable conductor (26), and described movable conductor (26) is connected described movable contact (7) with described control bus (17).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE201010020245 DE102010020245A1 (en) | 2010-05-11 | 2010-05-11 | Thermal release |
| DE102010020245.2 | 2010-05-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102243950A true CN102243950A (en) | 2011-11-16 |
Family
ID=44222770
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202210158U Expired - Lifetime CN201893300U (en) | 2010-05-11 | 2010-05-31 | Thermal breaker |
| CN2010102004278A Pending CN102243950A (en) | 2010-05-11 | 2010-05-31 | Thermal actuator |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202210158U Expired - Lifetime CN201893300U (en) | 2010-05-11 | 2010-05-31 | Thermal breaker |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2387060B1 (en) |
| CN (2) | CN201893300U (en) |
| DE (1) | DE102010020245A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012003169A1 (en) * | 2012-02-17 | 2013-08-22 | Abb Ag | Thermal actuator assembly for circuit breaker, has actuator strip arranged parallel to metal strip and bent when temperature of actuator strip is increased by unilaterally clamped bending beam of metal strip |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2657292A (en) * | 1952-12-29 | 1953-10-27 | Gen Electric | Thermal element for switch mechanisms |
| FR2553928B1 (en) * | 1983-10-21 | 1986-08-08 | Merlin Gerin | MIXED HEATING BILAMET FOR THERMAL TRIGGER OF A CUTTING APPARATUS |
| DE4300909C2 (en) * | 1993-01-15 | 1997-02-06 | Abb Patent Gmbh | Thermal release, especially for a circuit breaker |
| DE102008017472A1 (en) | 2007-04-28 | 2008-11-06 | Abb Ag | Service switching device |
| DE102008007520B4 (en) | 2008-02-01 | 2013-03-28 | Rolf Kammerer | Surface working apparatus |
-
2010
- 2010-05-11 DE DE201010020245 patent/DE102010020245A1/en not_active Withdrawn
- 2010-05-31 CN CN2010202210158U patent/CN201893300U/en not_active Expired - Lifetime
- 2010-05-31 CN CN2010102004278A patent/CN102243950A/en active Pending
-
2011
- 2011-03-31 EP EP11002664.8A patent/EP2387060B1/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| DE102010020245A1 (en) | 2011-11-17 |
| EP2387060B1 (en) | 2017-05-17 |
| EP2387060A3 (en) | 2012-06-27 |
| CN201893300U (en) | 2011-07-06 |
| EP2387060A2 (en) | 2011-11-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20111116 |