CN1043222A - Be used for the device that the limiting circuit breaker joystick moves - Google Patents
Be used for the device that the limiting circuit breaker joystick moves Download PDFInfo
- Publication number
- CN1043222A CN1043222A CN89109122A CN89109122A CN1043222A CN 1043222 A CN1043222 A CN 1043222A CN 89109122 A CN89109122 A CN 89109122A CN 89109122 A CN89109122 A CN 89109122A CN 1043222 A CN1043222 A CN 1043222A
- Authority
- CN
- China
- Prior art keywords
- mentioned
- joystick
- contact
- cut
- circuit breaker
- 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.)
- Pending
Links
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
- H01H71/50—Manual reset mechanisms which may be also used for manual release
- H01H71/501—Means for breaking welded contacts; Indicating contact welding or other malfunction of the circuit breaker
Landscapes
- Breakers (AREA)
Abstract
The direct device of the shaft arm (75) of contact breaker (2) when one or more moving contacts (19) of circuit breaker and its fixed contact (20) when welding is arranged, can avoid joystick (62) to be moved to the disconnected position of standard-sized sheet.When moving contact (19) is in the close position, a latch fitting (70) is just promoted by a cam (72).If this joystick (62) is moved toward open position, the locking face (74) of the shaft arm (75) that links with joystick (62) just is meshed with the protruding part (76) of latch fitting (70), thereby avoids shaft arm (75) and joystick (62) to move to full open position.This has just been avoided, and joystick (62) is fixed on the open position mistakenly when the contact closure of circuit breaker (2), but also the visible indication of contact closure state is provided.
Description
This invention relates to electric circuit breaker, particularly includes direct contact breaker Bing Bei And can limit the device that handlebar moves when contact of breaker is closed the sort of electric circuit breaker.
Electric circuit breaker adopted a lot of years.Typical case is, they are series between power supply and the circuit, is used for interrupting the electric current in this circuit when circuit lives through current status and wherein transmits overcurrent at the appointed time.Adopt a kind of operating mechanism, in overcurrent condition, trip, discerptible electrical contact in the cut-off breaker, thus electric current flows in the halt circuit.
The operating mechanism of circuit breaker uses manual control device, and it makes the operations staff can disconnect contact with close circuit breaker where necessary.This manual control device is inactive when circuit breaker disconnects because of the circuit overcurrent condition, thereby avoids operating personnel to overlap the contact of circuit breaker before overcurrent condition is calmed down.
This operating mechanism to be designed to make can divide open contact disconnect and make position between move rapidly, thereby avoid moving contact to be parked in disconnecting fully and any centre position between the closure fully.This just can realize two targets.At first, when the contact rapid closing, make moving contact striking fixed contact make a concerted effort help to guarantee good electrical conductivity because the impurity that between contact, may have for example dust and dirt have been fallen by bullet.The second, when contact was opened rapidly, the possibility of the starting the arc had reduced between moving contact and fixed contact, because contact is separated rapidly by arc-chute, its distance is enough to restrain electric arc and open circuit.
Moving contact is designed to not only striking fixed contact when closure, but also slips over the surface of fixed contact.This phorogenesis further helps to remove the foreign material between the contact.
Although aforementioned features adopts when making circuit breaker,, insert between fixed contact and the moving contact in any case also have a small amount of foreign material fragment so that guarantee good electrical conductivity.In this case, the stationary components that exists contact is soldered to the possibility on the moving contact, and this just makes circuit breaker can not cut-off in overcurrent condition or during manual operation.If circuit breaker has fault mechanically, the contact welding also may take place, and this has also reduced moving contact and has been applied to power on the fixed contact.
Have one or more contact of breaker weldings, thereby the whole contacts that prevent whole utmost points move at circuit breaker trip or at joystick all and disconnect when cut-offfing the position.Yet, even in the electrical contact welding, the joystick of circuit breaker also can also manually move on to and cut-off the position, so circuit breaker still may be switched on.
This is because moving contact mechanically is coupled to joystick by biasing spring.If apply enough big power, joystick can overcome the biasing force of spring and move to open position.
This may produce the situation of danger close, for example, if operating personnel move on to open position to joystick, thereby thinks that electrical contact opens, and And is far from it Shang the circuit thereby also be cold, this moment Shi Ji.Its rough sledding is that the people may attempt manually to contact the live part of circuit, is shocked by electricity unintentionally.The danger that reduces this situation is one of purpose of the present invention just, and method provides and mechanically limits the device that joystick moves, and makes in the electrical contact closure, and such as when their weldings, joystick can not move to fully and cut-off the position.
The invention provides and be used for limiting the device that the electric circuit breaker joystick moves to the precalculated position, it comprises can be in the close position and cut-off the electrical contact of position, one closed and cut-off the joystick that moves between the position, and a shaft arm that moves with joystick.This device comprises the lever locking mechanism, the Bing Bei And that is used for directly contacting electric circuit breaker moves and the electrical contact of electric circuit breaker when being in closure state to open position from make position at joystick, the restriction joystick move to closed and cut-off between one give allocation.
An advantage is such fact: device of the present invention provides a kind of effective means, the joystick of circuit breaker presents full open position when the fixed contact welding corresponding with it of one or more moving contact of breaker in order to avoid, and And still is in the definite and visible indication of closure state in order to contact of breaker to be provided.
In the time of the following details description of considering selected most preferred embodiment and respective drawings, meeting of the present invention is better understood, and its further advantage and purposes are also more obvious, wherein:
Fig. 1 is the lateral longitudinal cutaway view of an electric circuit breaker, and it is comprising device of the present invention;
Fig. 2 is the front elevation view of Fig. 1 circuit breaker;
Fig. 3 is the rear elevation view of Fig. 1 circuit breaker;
Fig. 4 is the perspective view of Fig. 1 circuit breaker;
Fig. 5 is a side sectional view of Fig. 1 circuit breaker;
Fig. 6 is the exploded view of arc-chute among Fig. 4;
Fig. 7 is the partial view of this device among Fig. 1;
Fig. 8 is the perspective view of cross bar among Fig. 1.
Fig. 1 represents to include a circuit breaker of most preferred embodiment of the present invention to Fig. 8.Circuit breaker 2 comprises shell 4, and it is preferably made by moulded plastic.Shell 4 is made up of base 6 and dismountable outer cover 8.Removable outer cover 8 mechanically is connected to base 6 by using the bolt (not shown), and bolt is screwed into base 6 by hole 10.
Circuit breaker 2 adopts contact arm 12,14 and 16, and they cut-off three current paths or the utmost point with close circuit breaker 2. Contact arm 12,14 and 16 mechanically links with cross bar 18, and they are moved together, perhaps entirely in make position, perhaps entirely at open position.Contact arm 12,14 and 16 each self-supporting moving contact 17,19 and 23.Moving contact 19 is designed to mechanically contact fixed contact 20, so that by interpole 24 closed path paths.Contact 20 is supported by support 21.Similarly the fixed contact (not shown) provides to cut-off and the closed path path by the left utmost point 26 and the right utmost point 28.The operation of circuit breaker 2 will be described it with respect to middle fracture 24.Fracture 26 is identical with 28 devices that adopt and fracture 24 employings.
Electric current flows through heater 38 then, and it links with bimetal leaf 48 and terminal 37 on electric, and the latter is coupled to circuit.Heater 38 and bimetal leaf 48 all have known resistance characteristic, and when electric current flow through, their resistance caused heating.The heat that produces on heater 38 and bimetal leaf 48 has improved the temperature of bimetal leaf 48, makes its direction bending along arrow 50.
When contact arm 14 is in the close position, as shown in Figure 1, moving contact 19 is pressed into and fixed contact 20 tight fits by the power that spring 56 and 58 applies.Electric current from conductor 30 just can pass through the utmost point 24 when contact 19 and 20 so cooperates.
If contact arm 14 rises to open position, as Fig. 5, shown in Figure 7, do not have electric current to pass through, thereby the circuit of series connection with it is exactly an off-position at interpole 24.Because contact arm 12 and 16 is with contact arm 14 motions, the utmost point 26 and 28 has also just disconnected the electric current on it.
Shown in solid line among Fig. 1, joystick 62 is in make position.Shaft arm 75 mechanically is arranged near thrust piece 64 with joystick 62 and the pivot 100 ， And that links.Spring 56 and 58 is in by pressure condition, thereby applies one Xiang Shang And power left by connecting part 66 under 100 pairs on the pivot.Under connect part 66 and mechanically link with cross bar 18 and contact arm 14.Be applied to down the power that connects on the part 66 upwards again left, moving contact 19 and fixed contact 20 are connected with tight fit.
Fig. 7 represents that circuit breaker 2 is in open position, and this moment, contact 19 separated with contact 20, and joystick 62 is at open position.The fixed contact that moving contact 17 and 23 is also corresponding with them is what to separate, because they are with moving contact 19 motions.
As mentioned above, any one in the moving contact 17,19 and 23 may be the welding shape by the fixed contact corresponding with it on make position.Contact arm 12,14 and 16 and down connect part 66 and will be in position shown in Figure 1 in this case.Spring 56 and 58 will apply a biasing force to joystick 62, make it shift to make position.Yet, give joystick 62 by applying a suitable power, spring 56 and 58 biasing force can be overcome, thereby can allow joystick 62 shift to open position.The present invention to be ready avoiding this phenomenon to take place.
The present invention includes latch fitting 70, cam 72 and locking face 74.When moving contact 17,19 and 23 was in the close position, cross bar 18 and cam 72 presented position shown in Figure 1.Cam 72 improves latch fitting 70, and to position shown in Figure 1, the latter is by dull and stereotyped 71 location.
If joystick was shifted to open position afterwards, as shown in phantom in Figure 1, the locking face 74 of shaft arm 75 will be run into the projecting member 76 of latch fitting 70, thereby stops shaft arm 75, and joystick 62 continues to full open position as shown in Figure 7.Remove in case overcome the manual force of spring 56 and 58 biasing forces, joystick 62 will turn back to make position.
Therefore, the invention provides dual superiority, both avoided joystick 62 when the contact closure of circuit breaker 2, to be in open position mistakenly and the phase connection circuit is still chargedly, provided true but also visible indication for the contact closure state thereby not only joystick 62 can be moved on to make position.
If when moving contact 17,19 and 23 does not all have the fixed contact welding corresponding with it, joystick 62 is shifted to open position from make position, spring 56 and 58 will apply upwards again to the right power to connecting part 66 down, and it is rotated around cross bar 18 along the direction of camber line 78.At joystick 62 further before open position moves and does not reach the position shown in Fig. 1 dotted line, spring 56 and 58 is applied to down the power that connects on the part 66 will make cross bar and contact arm 12,14 and 16 rotate along the direction of curved arrow 78 rapidly, thus the contact of cut-off breaker 2.
When cross bar 18 rotated with arrow 78 directions, cam 72 also was rotated and breaks away from and the contacting of latch fitting 70, and this makes latch fitting 70 forward position shown in Figure 7 downwards to.Thereby projecting member 76 forwards the place that it can not run into latch fitting surface 74 to, and this is moved on up to full open position shown in Figure 7 joystick 62.
If circuit breaker 2 is by bimetal leaf or the tripping operation of electromagnetic type overcurrent protective device, device of the present invention also has enough effectively function.Surpass circuit breaker 2 rated values 10% to 500% in the given time if flow through the current amplitude of circuit breaker 2 any one utmost point, thereby the end 80 of bimetal leaf 48 will be moved the end 82 that compresses trip(ping) bar 84 along the direction of arrow 50, and this causes that again trip(ping) bar 84 rotates along the direction of curved arrow 86.
Equally, if the current amplitude of the circuit breaker 2 of flowing through surpasses circuit breaker 2 rated values more than 500%, the direction that the magnetic force that pivot member 44 will produce at electromagnetic assembly 40 immediately influences lower edge arrow 46 moves.Pivot member 44 mechanically links with trip(ping) bar 84.When pivot member 44 moved with the direction of arrow 46, trip(ping) bar 84 was just done pivot type rotation along the direction of curved arrow 86.Therefore, no matter be bimetal leaf overcurrent protection or electromagnetic type overcurrent protection when finding overcurrent condition, trip(ping) bar 84 all pivots along curved arrow.
Trip(ping) bar 84 mechanically links with lock bolt 88.Lock bolt 88 is by the direction of spring 90 deflection arrows 92 under the normal condition.Yet under overcurrent condition, bimetal leaf 48 and pivot member 44 can both apply the biasing force that enough power removes to overcome spring 90 on trip(ping) bar 84, thereby lock bolt 88 is moved along the direction of arrow 94.
As shown in Figure 1, the part of carriage 96 pierces into the opening 98 that forms on the lock bolt 88.Carriage 96 pierces into lock bolt 88 on this part hook of opening 98, and this just makes carriage 96 not rotate by pivot 100 under spring 56 is applied to partial pressure on the carriage 96.
Since carriage 96 mechanically links with pivot 100, and pivot 100 mechanically links with contact arm 12,14 and 16, carriage 96 has just avoided pivot 100 to move up under the biasing force influence of spring 56 and 58 with the annex that it mechanically is connected.Yet when lock bolt 88 is driven by trip(ping) bar 84 and when the direction of arrow 94 moved, lock bolt 88 was just thrown off with carriage 96, this just makes pivot 100, and carriage 96 connects part 66 down and contact arm 12,14 and 16 moves up.Simultaneously, because the partial pressure of spring 56 and 58, cross bar 18 also moves along the direction of arrow 78.Contact arm 12, the 14 and 16 this motions that make progress make moving contact 17,19 separate with 23 fixed contacts corresponding with it, thereby have disconnected whole three utmost points of circuit breaker 2.
But circuit breaker 2 tripping operations when if a fixed contact corresponding with it in the moving contact is welded together, contact arm 12,14 and 16 can not be raised, thereby cross bar 18 just can not produce position shown in Figure 1.If want joystick 62 is moved to open position, latch fitting 70 will be raised, and as shown in Figure 1, And runs into the locking face 74 of shaft arm 75.Therefore, whenever as long as contact 17,19 and 23 is closed, the present invention has just avoided joystick 62 to be moved to full open position.
When circuit breaker 2 tripping operation, joystick 62 is from make position, as shown in Figure 1, to approximately be in the close position and open position between on the way a centre position move.This provides a visible indication: circuit breaker 2 has tripped because of overcurrent.Method with joystick 62 being moved on to the involution position can make circuit breaker 2 involutions, that is carriage 96 and lock bolt 88 are meshed again.This involution is just can carry out when cut-offfing at the contact of circuit breaker only, because device of the present invention can avoid joystick 62 to be moved to the involution position when contact closure.Joystick 62 moves on to make position subsequently, this contact arm 12,14 and 16 that just pivoted downwards, so moving contact 17,19 contact with 23 just corresponding fixed contacts with it, closure whole three utmost points of circuit breaker.
Arc-chute 102 comprises a lot of U matrix 104, and their relative position is by insulating part 106,108 and 110 location.Arc-chute 102 can knock out rapidly because any electric arc that the moving contact fixed contact corresponding with it forms when separating.For two other utmost point of circuit breaker 2 provides two additional arc-chute (not shown).
Also be provided with hand trip(ping) knob 112, manually tripping circuit breaker 2.When knob 112 was depressed, it applied a power by a mechanical chain (not shown), with enough big angle of trip(ping) bar 84 rotations, removed tripping circuit breaker 2.
Like this, as can be seen, device of the present invention provides effective means, the joystick of both having avoided circuit breaker is when one or more moving contacts of circuit breaker fixed contact corresponding with it has welding, mistake provides the still closed true and visible indication of contact of circuit breaker again at full open position.
Perhaps the someone dislikes expressing for convenience of explanation some selectable parts, such as special terminal installation etc.These optional Bu spare And do not force appointment for operation of the present invention, and they can remove or revise and not reduce validity of the present invention.
Although, clearly, can make numerous changes of details and not depart from the present invention who in accompanying Claim, defines to those those skilled in the art for specific embodiments more of the present invention that the purpose explained has been described.
Claims (2)
1, circuit over-current protection device, it includes: can be in and cut-off the electrical contact that the position allows electric current to circulate to cut off electric current in the circuit and can be in the close position again in circuit; With the shaft arm that at least one above-mentioned electrical contact links, be used for manually moving above-mentioned electrical contact between position and the above-mentioned make position above-mentioned cut-offfing; A joystick that links with above-mentioned shaft arm can be in the close position and cut-off the position, is used for moving above-mentioned shaft arm; An overcurrent protective device, it mechanically links with at least one above-mentioned electrical contact, at least one above-mentioned contact can be moved to the above-mentioned position of cut-offfing when the electric current in the circuit surpasses predetermined value in the given time; It is characterized in that a lever lock with respect to the special location of above-mentioned shaft arm, this part both had been used for directly contacting above-mentioned shaft arm, be used for again being in above-mentioned make position and above-mentioned joystick manually when moving, is limited this joystick and only moves to above-mentioned make position and above-mentioned a certain precalculated position of cut-offfing between the position to the above-mentioned position of cut-offfing from above-mentioned make position at above-mentioned electrical contact.
2, the device of claim 1, wherein: above-mentioned shaft arm limits a recessed field of conjugate action, and above-mentioned lever lock limits a pivot lock bolt that just in time meshes the above-mentioned field of conjugate action, this lock bolt when joystick above-mentioned electrical contact be in closure and by from above-mentioned make position to the above-mentioned position of cut-offfing when moving, the restriction joystick only moves to above-mentioned precalculated position.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US28113588A | 1988-12-08 | 1988-12-08 | |
| US281,135 | 1988-12-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1043222A true CN1043222A (en) | 1990-06-20 |
Family
ID=23076087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN89109122A Pending CN1043222A (en) | 1988-12-08 | 1989-12-08 | Be used for the device that the limiting circuit breaker joystick moves |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPH02199734A (en) |
| CN (1) | CN1043222A (en) |
| AU (1) | AU4473389A (en) |
| BR (1) | BR8906276A (en) |
| CA (1) | CA2004181A1 (en) |
| GB (1) | GB2226451B (en) |
| ZA (1) | ZA898764B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101364506B (en) * | 2007-08-10 | 2011-04-20 | Ls产电株式会社 | Molded case circuit breaker with contact on mechanism |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2704354B1 (en) * | 1993-04-20 | 1995-06-23 | Merlin Gerin | CONTROL MECHANISM OF A MODULAR ELECTRIC CIRCUIT BREAKER. |
| EP0827173B1 (en) * | 1996-03-15 | 2006-10-18 | Mitsubishi Denki Kabushiki Kaisha | Circuit breaker |
| US5927484A (en) * | 1997-05-28 | 1999-07-27 | Eaton Corporation | Circuit breaker with welded contact interlock, gas sealing cam rider and double rate spring |
| DE19841685C2 (en) * | 1998-09-11 | 2002-10-31 | Aeg Niederspannungstech Gmbh | switch |
| US9349560B2 (en) * | 2014-02-20 | 2016-05-24 | General Electric Company | Limiter type air circuit breaker with blow open arrangement |
| CN107112169B (en) * | 2015-01-09 | 2019-03-29 | 三菱电机株式会社 | Circuit-breaker |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE8023509U1 (en) * | 1980-08-29 | 1980-11-27 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Low voltage circuit breaker for locking lever |
| US4679016A (en) * | 1986-01-08 | 1987-07-07 | General Electric Company | Interchangeable mechanism for molded case circuit breaker |
| GB2215519B (en) * | 1988-03-01 | 1991-12-18 | Midland Electric Mfg Co Ltd | Circuit breaker |
-
1989
- 1989-11-16 ZA ZA898764A patent/ZA898764B/en unknown
- 1989-11-17 AU AU44733/89A patent/AU4473389A/en not_active Abandoned
- 1989-11-29 CA CA002004181A patent/CA2004181A1/en not_active Abandoned
- 1989-12-06 BR BR898906276A patent/BR8906276A/en unknown
- 1989-12-07 GB GB8927714A patent/GB2226451B/en not_active Expired - Fee Related
- 1989-12-08 CN CN89109122A patent/CN1043222A/en active Pending
- 1989-12-08 JP JP1320352A patent/JPH02199734A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101364506B (en) * | 2007-08-10 | 2011-04-20 | Ls产电株式会社 | Molded case circuit breaker with contact on mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2004181A1 (en) | 1990-06-08 |
| JPH02199734A (en) | 1990-08-08 |
| ZA898764B (en) | 1990-08-29 |
| GB8927714D0 (en) | 1990-02-07 |
| AU4473389A (en) | 1990-06-14 |
| BR8906276A (en) | 1990-08-21 |
| GB2226451A (en) | 1990-06-27 |
| GB2226451B (en) | 1993-07-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4484046A (en) | Vacuum load break switch | |
| US4553115A (en) | Molded case circuit breaker with single solenoid operator for rectilinear handle movement | |
| JP5426516B2 (en) | Circuit breaker with instantaneous trip mechanism | |
| US4528531A (en) | Molded case circuit breaker with improved operating mechanism | |
| JP2002500812A (en) | Circuit breaker with PTC (positive temperature coefficient resistivity) element | |
| JPS6222342A (en) | Circuit breaker | |
| CN1073744C (en) | Circuit breaker | |
| US6689979B1 (en) | Switching contact arrangement of a low voltage circuit breaker with main contacts, intermediate contact and arcing contacts | |
| EP0146805A2 (en) | Electric circuit breaker with improved contact structure | |
| US5272291A (en) | Dual switch actuator mechanism with Geneva drive plate and follower plates detent assembly | |
| CN1043222A (en) | Be used for the device that the limiting circuit breaker joystick moves | |
| US4827231A (en) | Molded case circuit breaker with viewing window and sliding barrier | |
| JPH0336264B2 (en) | ||
| KR101463043B1 (en) | Slide type movable contactor assembly for circuit breaker | |
| JP4030504B2 (en) | Air circuit breaker | |
| US5835002A (en) | Interlock assembly for a manually operated multi-phase fusible switch | |
| CN86104588A (en) | Current limiting circuit breaker with arc commutating structure | |
| CA1102385A (en) | Switch operating rod assembly | |
| EP0898292B1 (en) | Electric control apparatus | |
| JP2001504983A (en) | Current limiting circuit breaker with PTC (positive temperature coefficient resistivity) element and arc extinguishing ability | |
| US11984282B2 (en) | Circuit breaker | |
| CN109950104B (en) | Thermomagnetic trip assembly and electrical switch unit | |
| CN2359795Y (en) | Device for limitting main spindle rotating range in circuit breaker | |
| CN1153992A (en) | Control and signalling device for protective switching apparatus | |
| US4346358A (en) | Contact pop responsive latch release for circuit breakers |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |