CN202058668U - Selective circuit protection switch - Google Patents
Selective circuit protection switch Download PDFInfo
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- CN202058668U CN202058668U CN2010206478438U CN201020647843U CN202058668U CN 202058668 U CN202058668 U CN 202058668U CN 2010206478438 U CN2010206478438 U CN 2010206478438U CN 201020647843 U CN201020647843 U CN 201020647843U CN 202058668 U CN202058668 U CN 202058668U
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- 230000007246 mechanism Effects 0.000 claims abstract description 41
- 230000003111 delayed effect Effects 0.000 claims description 4
- 238000013461 design Methods 0.000 description 5
- 230000002349 favourable effect Effects 0.000 description 5
- 230000014509 gene expression Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 241001295925 Gegenes Species 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The utility model relates to a selective circuit protection switch. A main current path comprises a main thermal bimetal tripper, a main contact and a magnetic system in serial connection with one another, wherein a secondary current path is parallel to the main thermal bimetal tripper and the extension part of the main contact; the secondary current path comprises a current-limiting resistor, a selective bimetal tripper and a separate contact; a switching handle is arranged in a switching mechanism; when the switching handle is operated, the main contact and the separate contact are opened or closed under the action of the switching mechanism via a second effective connecting wire and a third effective connecting wire; the switching mechanism is tripped under the action of the main thermal bimetal tripper via a fourth effective connecting wire; the switching mechanism is tripped under the action of the selective bimetal tripper via a fifth effective connecting wire; and after the switching mechanism trips, the main contact is firstly opened, and then the separate contact is opened in a time delay manner.
Description
Technical field
The present invention relates to a kind of selectivity line protection switch (Leitungsschutzschalter) of the preamble according to claim 1.
Background technology
For example, in file DE 195 26 591 A1, DE 195 26 592 C2, CN201160057Y, such selectivity line protection switch has been described.
The purpose of this selectivity line protection switch is; in electric electrical appliance electrical network; overcurrent scope assurance selectivity for the qualification in the cascade (Kaskadenschaltung) that has (nachgeordnet) protection mechanism of one or more subordinates (for example, non-selective line protection switch).
For this reason, so determine the size (dimensionieren) in secondary current path, that is, realize threading off with interior time delay with for example 10ms in range of choice
When in the electrical appliance electrical network, short circuit occurring and when this short circuit by the line protection switch of subordinate in time delay during with internal cutting off, then the selectivity line protection switch remains in the state of connection.This is referred to as selective row.In this case, under situation not, the main contacts in primary current path is disconnected momently by magnetic system (being also referred to as bump armature (Schlaganker)) with switching mechanism release (entklinken).The arc voltage that is produced impels electric current to pass through the secondary current path.Design alternative bimetallic release like this
And current-limiting resistance, that is, only after time delay finishes, selectivity bimetallic release just can be with switch lock (Schaltschloss) release, and thus main contacts and separated contacts is disconnected enduringly.
Even when overcurrent and this overcurrent in the electrical appliance electrical network, occurring and do not cut off, then in the primary current path of selectivity line protection switch, also realize cutting off by main thermo bimetal by the line protection switch of subordinate.This main thermo bimetal makes the switching mechanism release, and main contacts and separated contacts is disconnected and the maintenance disconnection.
In known selectivity line protection switch, under the situation that overcurrent is threaded off, realize the disconnection of main contacts and separated contacts simultaneously.Thus, two contacts must cut off whole overcurrents.Thus, the contact damage that causes by in the scaling loss at contact place can appear
And contact melting welding (Kontaktverschwei β ung) (especially at the separated contacts place).
Summary of the invention
Purpose of the present invention is to improve a kind of selectivity line protection switch, thereby avoid the contact damage at the place, contact.
This purpose is by having the selectivity line protection switch realization according to the feature of claim 1.
According to the present invention, primary current path stretches between lead-in clamp and output wiring terminal, and wherein, primary current path comprises main thermo bimetal's release, main contacts and the magnetic system of series connection, wherein, this magnetic system can make main contacts disconnect and make main contacts keep disconnecting by first effective connecting line.Main thermo bimetal and main contacts that the secondary current path is parallel to primary current path stretch, and wherein, the secondary current path comprises current-limiting resistance, selectivity bimetallic release and separated contacts.Switching mechanism is provided with the switching handle, and wherein, when handling the switching handle, switching mechanism acts on main contacts and separated contacts by the second and the 3rd effective connecting line, to be used to that main contacts and separated contacts are disconnected or closure.Main thermo bimetal's release is imitated connecting line by having ideals, morality, culture, and discipline and is acted on switching mechanism, to be used to that switching mechanism is threaded off.Selectivity bimetallic release acts on switching mechanism by the 5th effective connecting line, to be used to that switching mechanism is threaded off.After switching mechanism was threaded off, main contacts at first disconnected, and the mode that separated contacts was delayed with the time disconnects subsequently.
According to favourable form of implementation of the present invention, when switching mechanism was connected, separated contacts was at first closed, and the mode that main contacts was delayed with the time is closed subsequently.
Advantage according to design of the present invention is, when main contacts in overcurrent condition disconnects, overcurrent is directed on the secondary current path, and whole current loads of crossing disconnects so that main contacts needn't rely on (gegen).In the secondary current path, by current-limiting resistance restriction overcurrent, thereby when separated contacts finally also disconnected, this separated contacts only must rely on lower electric current to disconnect, thereby can avoid the contact damage at the separated contacts place.
If it is at first closed to separate the contact when connecting, the advantage that has so is, because the current-limiting resistance in the secondary current path, before all electric current flow through under the closed situation of main contacts, it was possible at first flowing through limited electric current under the situation of existing load.Therefore, by limited switching current (Aufschaltenstrom) combined floodgate (aufschalten).This protects equally when connecting and (schonen) contact.Even when closing a floodgate, at first also limit switching current by the current-limiting resistance in the secondary current path under short-circuit conditions, the selectivity bimetallic provides the cut-out again of limited electric current over time afterwards.In this case, it protects contact equally.
According to favourable form of implementation of the present invention, main contacts comprises fixing contact (Kontaktst ü ck) and is bearing in engagement lever arm (Kontakthebelarm) in the rotating shaft of fixed-site swingably, this engagement lever arm is provided with movable contact, and separated contacts comprises the contact of motion and is bearing in contact strutting piece in the rotating shaft of fixed-site swingably
This contact strutting piece is provided with fixing contact, and, switching mechanism utilizes its member supporting alone in circuit board support, and, engagement lever (Kontakthebel) is a double-arm lever, the control lever acts on the arm place opposite with movable contact of double-arm lever, the other end of control lever hingedly is connected with lever in the middle of first by rotational pin, and, the other end of this lever in the middle of first with switch the grip hinged second in the middle of lever hingedly link, and, swivel pin (utilizing this swivel pin that two middle levers are interconnected) is directed in the slotted hole of rotatably mounted pawl lever, and be provided with the dropout lever, pawl lever and this dropout lever form and end position, lock section (Verklinkungsstelle).
According to favourable form of implementation of the present invention, cut-out spring acts on the rotational pin place that connects the control lever and the first middle lever, and on the direction that main contacts disconnects, the control lever is loaded by this rotational pin, and so set (einrichten) cut-out spring and introduce (Krafteinleitung) to the power at rotational pin place, that is, the first less component acts on only the position, lock section and the second bigger component acts on the control lever.
According to favourable form of implementation of the present invention, cut-out spring is torsionspring (Drehfeder), the first side of this torsionspring (Schenkel) is supported on the some place of fixed-site, and the power that the second side by this torsionspring is implemented on the rotational pin is introduced.
According to favourable form of implementation of the present invention, the rotating shaft of the fixed-site of the contact strutting piece of torsionspring winding separated contacts.
Description of drawings
Further explain and describe the present invention and preferred design of the present invention according to the accompanying drawing that embodiments of the invention are shown therein.
Wherein:
Fig. 1 has shown the switch lock according to selectivity line protection switch of the present invention in the position of closure,
Fig. 2 has shown the main contact that has disconnection and the switch lock according to Fig. 1 of secondary contact, and
Fig. 3 has shown the line map according to selectivity line protection switch of the present invention.
List of reference characters
1 selectivity line protection switch
10 main contactss
The fixing contact of 11 main contactss
The engagement lever of 12 main contactss
The movable contact of 13 main contactss
14 rotating shafts
The first arm of 15 engagement levers
Second arm of 16 engagement levers
17 control levers
18 rotational pins
Lever in the middle of 19 first
20 swivel pins
Lever in the middle of 21 second
The axle of 22 fixed-site
23 jointed shafts
24 switch handle (Schaltknebel)
25 switch handle
26 slotted holes
27 pawl levers
271 lugs
The rotating shaft of 28 pawl levers
The axle of 29 dropout levers
30 dropout levers
The first arm of 301 dropout levers
302 lugs
Second arm of 303 dropout levers
304 lugs
31 end the position, lock section
The rotating shaft of the fixed-site of 33 contact strutting pieces 34
34 contact strutting pieces
The engagement lever of 35 separated contacts
The movable contact of 36 separated contacts
37 separated contacts
The fixing contact of 38 separated contacts
138 connecting lines
The first arm of 39 contact strutting pieces
Second arm of 40 contact strutting pieces
46 connecting line 20-23
47 connecting line 20-22
48 lugs
50 contact pressures
51 torsionsprings, cut-out spring
The first side of 52 torsionsprings
The point of 53 fixed-site
The second side of 54 torsionsprings
55 spring forces
56 first component
57 second component
58 directing pin
49 protuberances
62 auxiliary contacts
63 switching mechanisms
64 lead-in clamps
65 output wiring terminals
66 main thermo bimetal's releases
67 magnetic systems
68 current-limiting resistances
70 switch handle
621 first effective connecting lines
622 second effective connecting lines
623 the 3rd effective connecting lines
Connecting line is imitated in 624 having ideals, morality, culture, and discipline
625 the 5th effective connecting lines
Embodiment
At first observe line map according to Fig. 3.At this, schematically show selectivity line protection switch 1, this selectivity line protection switch 1 has main contacts 10, the separated contacts in the secondary current path 37 and the switching mechanism 63 in primary current path.Primary current path stretches between lead-in clamp 64 and output wiring terminal 65, and wherein, primary current path comprises main thermo bimetal's release 66, main contacts 10 and the magnetic system 67 of series connection.Magnetic system 67 can make main contacts 10 disconnect, and makes main contacts 10 keep disconnecting by first effective connecting line 621.Main thermo bimetal 66 and main contacts 10 that the secondary current path is parallel to primary current path stretch, and wherein, the secondary current path comprises current-limiting resistance 68, selectivity bimetallic release 69 and separated contacts 37.Switching mechanism 63 is provided with and switches handle 70, and wherein, when handling switching handle 70, switching mechanism 63 acts on main contacts and separated contacts 61,37 by the second and the 3rd effective connecting line 622,623, to be used to make main contacts and separated contacts 61,37 disconnections or closed.Main thermo bimetal's release 66 is imitated connecting line 624 by having ideals, morality, culture, and discipline and is acted on switching mechanism 63, to be used to that switching mechanism 63 is threaded off.Selectivity bimetallic release 69 acts on switching mechanism 63 by the 5th effective connecting line 625, to be used to that switching mechanism 63 is threaded off.As shown in according to the design form of Fig. 1 and 2, so set switching mechanism, that is, after switching mechanism 63 is threaded off, at first disconnect main contacts 61, and disconnect separated contacts 37 afterwards in the mode that the time is delayed.For example, the value of supposing current-limiting resistance is 0.5Ohm.Thus, when line voltage is 230V, the secondary current current in loop is limited in maximum 460A-even in (nachgeschaltet) in downstream current circuit, exists under the situation of short circuit.
Observe design form now according to Fig. 1 and 2.Switch lock has main contacts 10, the movable contact 13 that this main contacts 10 has fixing contact 11 and is fixed on engagement lever 12 places.
Engagement lever 12 can be rotated to support on rotating shaft 14 places of fixed-site, and be configured to double-arm lever, the first arm 15 of this double-arm lever is loaded with contact 13, and control lever 17 acts on second arm, 16 places of this double-arm lever, and this control lever 17 makes engagement lever 12 move to the open position (see figure 2) from the on-position (see figure 1).
Unshowned contact pressure spring works at the engagement lever place, and attempts to utilize the contact force of pointing out by arrow 50 that movable contact 13 is pressed to fixing contact 11.
Control lever 17 is connected with lever 19 in the middle of first by rotational pin 18.This first middle lever 19 is connected with lever 21 in the middle of second in hinged mode by swivel pin 20, and this second middle lever 21 is hinged at jointed shaft 23 places and has switching handle 24 places of switching handle 25.This switching handle 24 is bearing in the axle 22 of fixed-site.
Between connecting line (axle 22 of the rotating shaft 28 of the fixed-site of this connecting line connection pawl lever 27 and the fixed-site of switching handle 24) and contact 10, be provided with the rotating shaft 33 of fixed-site, be supported with contact strutting piece 34 at these rotating shaft 33 places, this contact strutting piece 34 is loaded with engagement lever 35.
The movable contact 36 of separated contacts 37 is fixed on the free end place of engagement lever 35.Separated contacts 37 has fixing contact 38, and this contact 38 can fixed-site and the mode of conduction be connected with the fixing contact 11 of main contacts 10 (connecting line 138 is by a dotted line pointed out).
Contact strutting piece 34 is configured to the both arms strutting piece.Arm 39 towards main contacts 10 is loaded with engagement lever 35 and movable contact 36.Second arm 40 that stretches out in the opposite direction has protuberance 49.
Lug 48 molded (anformen) is at control lever 17 places, this lug 48 and protuberance 49 actings in conjunction like this that contacting strutting piece 34 places, promptly, in the disconnection process of main contacts 10, disconnect back separated contacts 37 and disconnect at main contacts 10, and when main contacts 10 is closed before main contacts 10 is closed separated contacts 37 closure.
In the open position according to Fig. 2, the connecting line of swivel pin 20 and jointed shaft 23 (it has reference number 46) stretches under connecting line 47 (this connecting line 47 is stretching between the axle 22 of the fixed-site of swivel pin 20 and switching handle 24).In open position, this is first settling position of switching mechanism.
In the on-position according to Fig. 1, connecting line 46 stretches on the axle 22 of fixed-site.In on-position, this is second settling position of switching mechanism.
Torsionspring 51 twines the rotating shaft 33 of the fixed-site of contact strutting piece 34.The first side 52 of torsionspring 51 is supported on point 53 places of fixed-site.The point 53 of this fixed-site can be protuberance or the recess on the inboard of the shell wall of switch, but it also can be the supporting position at the circuit board support place of switch lock.
The second side 54 of torsionspring 51 is supported against rotational pin 18 at its free end place, and this rotational pin 18 will be controlled lever 17 and be connected with lever 19 in the middle of first.Thus, realized that by the second side 54 of torsionspring 51 spring force introduces to the power on the rotational pin 18.By arrow 55 these spring forces of expression, this spring force is perpendicular to being introduced on the rotational pin 18 in the contact point of second side 54 between side 54 and rotational pin 18.Spring force resolves into: the first less component (by arrow 56 expressions), this component point to lever 19 in the middle of (lenken) first; And the second bigger component (by arrow 57 expressions), this component attempts to make 17 displacements of control lever on the direction of " disconnecting main contacts 10 ".
Only the first less component 56 (it points to lever 19 in the middle of first) is created in the only releasing force at 31 places, position, lock section.This releasing force is less relatively, thereby also only must apply little tripping force by thermal overload release, works in lug 304 places of this tripping force on dropout lever 30.
The second bigger component 57 is so big, that is, this power can overcome contact pressure 50, and can disconnect main contacts 10 and separated contacts 37 by control lever 17.As possible, at this, can assist second component 57 of torsionspring 51 by the power of another tension spring, this tension spring is hinged on control lever 17 places on the one hand and is hinged on second arm, 40 places of contact strutting piece 34 on the other hand.At this not shown this another tension spring, yet in above-mentioned file DE195 26 591 and file DE 195 26 592, its function has been described.Same this another tension spring is not essential for the present invention, and for dispensable according to working of switch of the present invention.
Therefore, in the dropout situation, dropout lever 30 is swung clockwise, and at this, is overcoming only position, lock section 31 of 56 times release of little releasing force.Thus, be released in the swivel pin 20 in the slotted hole 26 of pawl lever 27, and can will control lever 17 by the second bigger component 57 and push away the fixed pan that the rotating shaft 14 by the fixing contact 11 of main contacts 10 and engagement lever 12 is limited.At this, control lever 17 drives second arm 16 of engagement lever 12 by directing pin 58, and so makes it overcome contact pressure 50 and swing widdershins, that is, main contacts 10 is disconnected.
By lever 21 in the middle of the lever in the middle of first 19, second and switch that handle 24 forms and take such form by the layout of swivel pin 20 (it is directed in slotted hole 26) and pawl lever 27 coefficient articulated link chains (Gelenkkette), promptly, making switching handle 24 swing clockwise and make pawl lever 27 put back it immediately once more ends in the lock position, thereby, when thermal overload release cools off once more and moves when getting back in its original position, only make position, lock section 31 end lock once more.Figure 2 illustrates this position.
Leave position shown in figure 2, switch handle 25 and switch handle 24 thus by being rotated counterclockwise that switching mechanism is connected once more is possible.At this, also tension once more of torsionspring 51 afterwards.
Claims (6)
1. a selectivity line protection switch has main contacts (10), the separated contacts in the secondary current path (37) and switching mechanism (63) in primary current path, it is characterized in that,
-described primary current path stretches between lead-in clamp (64) and output wiring terminal (65), wherein, described primary current path comprises main thermo bimetal's release (66) of series connection, described main contacts (10) and magnetic system (67), wherein, described magnetic system (67) can make described main contacts (10) disconnect and make described main contacts (10) keep disconnecting by first effective connecting line (621);
Main thermo bimetal (66) and main contacts (10) that-described secondary current path is parallel to described primary current path stretch, and wherein, described secondary current path comprises current-limiting resistance (68), selectivity bimetallic release (69) and described separated contacts (37),
-described switching mechanism (63) is provided with and switches handle (70), wherein, when handling described switching handle (70), described switching mechanism (63) is by the second and the 3rd effective connecting line (622,623) act on described main contacts and described separated contacts (61,37), to be used for described main contacts and the described separated contacts (61 of making, 37) disconnection or closed
-described main thermo bimetal's release (66) is imitated connecting line (624) by having ideals, morality, culture, and discipline and is acted on described switching mechanism (63), being used to that described switching mechanism (63) is threaded off,
-described selectivity bimetallic release (69) acts on described switching mechanism (63) by the 5th effective connecting line (625), threads off to be used to make described switching mechanism (63), and
-after described switching mechanism (63) was threaded off, described main contacts (61) at first disconnected, and the mode that described separated contacts (37) was delayed with the time disconnects subsequently.
2. selectivity line protection switch according to claim 1; it is characterized in that; described separated contacts (37) is contact at first closed when described switching mechanism (63) is connected, and the mode subsequently closed contact of described main contacts (63) for when described switching mechanism (63) is connected, delaying with the time.
3. selectivity line protection switch according to claim 1 is characterized in that,
-described main contacts (10) comprises fixing contact (11) and is bearing in engagement lever arm (12,15) in the rotating shaft (14) of fixed-site swingably, and described engagement lever arm (12,15) is provided with movable contact (13),
-described separated contacts (37) comprises movable contact (36) and is bearing in contact strutting piece (34) in the rotating shaft (33) of fixed-site swingably, and described contact strutting piece (34) is provided with fixing contact (38),
-described switching mechanism (63) utilizes its member supporting alone in circuit board support,
-described engagement lever (12) is a double-arm lever, control lever (17) acts on the arm place opposite with described movable contact (13) of described double-arm lever (12), the other end of described control lever (17) hingedly is connected with lever (19) in the middle of first by rotational pin (18)
The other end of lever (19) hingedly links with locate the second hinged middle lever (21) at described switching handle (24) in the middle of-described first,
-swivel pin (20) is directed in the slotted hole (26) of rotatably mounted pawl lever (27), utilizes described swivel pin (20) that two middle levers (19,21) are interconnected,
-being provided with dropout lever (30), described pawl lever (27) forms with described dropout lever (30) and ends position, lock section (31).
4. selectivity line protection switch according to claim 3 is characterized in that,
-cut-out spring (51) acts on the rotational pin (18) that connects the described control lever (17) and the described first middle lever (19) and locates, and on the direction that described main contacts (10) disconnects, described control lever (17) is loaded by described rotational pin (18)
-wherein, so set the power introducing that described cut-out spring (51) is located to described rotational pin (18), that is, the first less component (56) acts on described only position, lock section (31) and the second bigger component (57) acts on described control lever (17).
5. selectivity line protection switch according to claim 4; it is characterized in that; described cut-out spring (51) is a torsionspring; the first side of described torsionspring (52) is supported on the point (53) of fixed-site and locates, and the power that the second side (54) by described torsionspring is implemented on the described rotational pin (18) is introduced.
6. selectivity line protection switch according to claim 5 is characterized in that, described torsionspring (51) twines the rotating shaft (33) of fixed-site of the contact strutting piece (34) of described separated contacts (37).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE202010015549.5 | 2010-11-16 | ||
| DE202010015549 | 2010-11-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202058668U true CN202058668U (en) | 2011-11-30 |
Family
ID=45018634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206478438U Expired - Fee Related CN202058668U (en) | 2010-11-16 | 2010-11-24 | Selective circuit protection switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202058668U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103367068A (en) * | 2012-04-05 | 2013-10-23 | 富士电机机器制御株式会社 | Circuit breaker |
-
2010
- 2010-11-24 CN CN2010206478438U patent/CN202058668U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103367068A (en) * | 2012-04-05 | 2013-10-23 | 富士电机机器制御株式会社 | Circuit breaker |
| CN103367068B (en) * | 2012-04-05 | 2015-11-25 | 富士电机机器制御株式会社 | Circuit-breaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111130 Termination date: 20191124 |
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| CF01 | Termination of patent right due to non-payment of annual fee |