CN1077328C - alarm device of circuit breaker - Google Patents
alarm device of circuit breaker Download PDFInfo
- Publication number
- CN1077328C CN1077328C CN97103345A CN97103345A CN1077328C CN 1077328 C CN1077328 C CN 1077328C CN 97103345 A CN97103345 A CN 97103345A CN 97103345 A CN97103345 A CN 97103345A CN 1077328 C CN1077328 C CN 1077328C
- Authority
- CN
- China
- Prior art keywords
- breaker
- circuit
- action
- alarm
- actuator
- 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 - Lifetime
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/04—Means for indicating condition of the switching device
-
- 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
- H01H73/12—Means for indicating condition of the switch
-
- 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
- H01H71/46—Automatic release mechanisms with or without manual release having means for operating auxiliary contacts additional to the main contacts
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Abstract
To design an alarm device so that with a small number of part items it can make alarming action that is stable over a long period, the device being incorporated into a circuit breaker main body and outputting an alarm signal when detecting overcurrent tripping action. A pushbutton type alarm switch with an automatically returning contact built in, a rocking lever type actuator placed opposite to the push button of the switch, and an operating lever interlocking the actuator with a movable contact holder that is a component member of the switch mechanism of a circuit breaker are combined and incorporated into a unit case. When the circuit breaker closes the circuit, the actuator is held in a free state, and the operating lever that follows the movement of the movable contact holder due to the overcurrent tripping action of the circuit breaker drives the actuator, pressing the push button of the alarm switch to put its built-in contact into reversing action to output an alarm signal.
Description
The present invention relates to a kind of alarm device, this alarm device is packed in the body of circuit-breaker, is used to catch tripping operation action that circuit breaker causes because of overcurrent or the disconnection action of being undertaken by the opening and closing operations handle, and to outside output alarm signal.
As objective for implementation, pack into setting in the breaker body of alarm device, for example disclosed device such as open the flat 1-137048 of communique number of Japanese Utility Model is a kind of well-known device with Inturruptor for sub-line etc.
In addition, as open the flat 6-52778 of communique number of Japan Patent proposes, when producing the overcurrent trip action, make the operating grip of circuit breaker be parked in common connection, disconnect the centre of operating position, in the circuit-breaker that constitutes like this,, propose for open the flat 8-087946 of communique number as Japan Patent by same applicant of the present invention as the concrete formation of the alarm device that selected member adopted.
This kind alarm device is to constitute like this, is about to the inner push button alarm contact (sensitive switch) that self return contact is housed, shakes the rod-type actuator, the button of alarm contact is applied the force application spring of pushing force and is connected in the charging apparatus shells such as action bars of circuit breaker movable contact anchor clamps and actuator by actuator with the button of this switch relatively disposes.
In such structure, when circuit-breaker is switched on, apply elastic force by above-mentioned force application spring, under normal on-state with the button of pushing alarm device.In addition, when disconnecting action in the action of generation overcurrent trip or by the opening and closing operations handle, the action bars drive actions device that moves along with the action of movable contact anchor clamps (these movable contact anchor clamps are component parts of switching mechanism), make the button of its detachment alarm switch, in this case, by the acts of determination of make and break contact, to outside output alarm signal.
But, adopt the above-mentioned alarm device of structure in the past that has, there is following problem aspect alarm action and cost, the durability.That is:
1) is attached to force application spring on the alarm device actuator, except be applied to circuit breaker switching mechanism (elbow-bar mechanism) as load on, also can make each the position component precision of alarm device that is contained in the breaker body, the elastic force of force application spring produce fluctuation, like this, when circuit breaker is done to disconnect action, sometimes be applied to the actuating force deficiency on the actuating strut of alarm device, and alarm contact can not positively be moved.
2) circuit-breaker is in the "on" position of connection usually, makes contact be in the time that disconnects operate condition by the action of lever operated or overcurrent trip and compares extremely short with common turn-on time.Therefore, under the circuit-breaker on-state, when keeping the load condition by the button of force application spring pushing alarm contact for a long time, circuit breaker is accompanied by the heating that causes of switching on also makes temperature rise, like this, force application spring itself and the contact blade (plate spring sheet) that is contained in the self return contact in the alarm contact make alarm contact might lose function because of creep reduces spring etc.
3) will be attached to as the force application spring of individual components on the actuator of alarm device, this also brings number of components and occupies problem such as space increase.
The present invention succeeds in developing in view of the above problems.The objective of the invention is to provide a kind of number of components few and can stably make the alarm device of the high circuit breaker of the reliability of alarm action over a long time in order to solve above-mentioned problem.
In order to achieve the above object, formation of the present invention is the push button alarm contact that self return contact is housed in inciting somebody to action, relative configuration with the button of this switch shake the rod-type actuator and connect this actuator and circuit breaker switching mechanism between action bars etc. in the lump in the alarm device in the charging apparatus shell, when circuit-breaker is in on-state, above-mentioned actuator keeps free state, when circuit-breaker is done to disconnect action, along with the action of the movable contact anchor clamps of described circuit breaker and just drive actions device of the action bars that moves, the button of pushing siren, make its inner contact do the counter-rotating action, in the described alarm device, one end of described action bars is combined on the actuator, make simultaneously the other end that is divided into two branches on the position of breaker body of packing into respectively with the movable contact anchor clamps that are located at circuit breaker on dog and the dog that is located on the opening and closing operations handle mutually opposed, and under the circuit-breaker on-state, between the dog of the front end of action bars and described movable contact anchor clamps, be provided with the gap.
In addition, according to the present invention, the alarm device of said structure can constitute with following concrete form.
1) end with action bars is combined on the actuator, make the other end on the position of breaker body of packing into the movable contact anchor clamps that are located at circuit breaker on dog mutually opposed, and under the circuit-breaker on-state, be provided with the gap between the dog of the front end of action bars and movable contact anchor clamps.
2) end with action bars is combined on the actuator, the other end that will be divided into two branches on the position of breaker body of packing into respectively with the movable contact anchor clamps that are located at circuit breaker on dog and the dog that is located on the opening and closing operations handle mutually opposed, and under circuit-breaker is in on-state, between the dog of the front end of action bars and movable contact anchor clamps, be provided with the gap.
3) above-mentioned 1), 2) in, actuator is made of rubber-like leaf spring material, the elastic force of this leaf spring material is greater than the reset force of the button of alarm contact.
4) shell of alarm device is made of phenol resin molding material, and the supporting foot be integrally formed on this shell, this support foot portion is used for respectively alarm contact, actuator and action bars are installed in assigned position.
According to structure recited above, circuit-breaker is under the common on-state of energising, and the actuator of alarm device is unfettered, and the interior contacts of alarm contact is made homing action, and button keeps outstanding state.Therefore, even use through long-term, the movable contact sheet of alarm contact can not be out of shape because of creep yet, can not reduce the necessary spring that automatically resets.In addition, do not need to set up force application spring on actuator, the quantity of the assembling parts of alarm device is few, and the product assembling is simple.
In addition, because overcurrent trip action or by lever operated when making circuit-breaker do to disconnect action, the action bars of the alarm device that at this moment moves along with the action of switching mechanism, button by actuator bulldozing operation alarm contact, make its interior contacts do the counter-rotating action, and the output alarm signal.When circuit-breaker resets to on-position again, remove the constraint of actuator, alarm contact automatically resets.
Action bars about the alarm device of packing into, requirement according to the circuit-breaker user, can adopt above-mentioned 1 selectively) or 2) in any form, only when causing the tripping operation action because of overcurrent, or cause tripping operation action and when doing to disconnect action, can export alarm signal because of overcurrent by the opening and closing operations handle.And, circuit-breaker is under on-state, be provided with the gap between the movable contact anchor clamps as charging part of the action bars of alarm device and circuit breaker, therefore, the heating of the contact blade that causes along with the energising of circuit breaker can not be delivered on the action bars, like this, can prevent that thermal deformation because of action bars from causing the misoperation of alarm contact.
As top 3) as described in, elasticity (tensile modulus of elasticity) and elastic force constitute greater than the leaf spring material of the reset force of the button of alarm contact because actuator is by having, therefore can eliminate the influence of the relative positional accuracy fluctuation of circuit-breaker and alarm device, and can utilize the button of the flexural force pushing alarm contact of actuator, make make and break contact do the counter-rotating action.That is to say that because the fluctuation of aforesaid positional precision is when causing stroke that actuator is urged greater than the alarm contact actuating length, actuator self can absorb superfluous stroke with the deflection surplus.Therefore, allow assembly precision that fluctuation is arranged slightly in the time of in circuit-breaker that alarm device is packed into.
And, according to top 4) structure, each parts in the alarm device of packing into are installed easily and the location, thereby have improved the assembleability of device.
Brief description of drawings:
Fig. 1 is the decomposition axonometric drawing of expression corresponding to the package assembly of the alarm device of the embodiment of the invention 1;
Fig. 2 is the action specification figure of Fig. 1, the on-state figure of Fig. 2 (a) indication circuit circuit breaker, Fig. 2 (b) expression is done the state diagram that disconnection is moved by operating grip, the movement state diagram of the alarm device that Fig. 2 (c) expression and the tripping operation action that causes because of overcurrent link;
Fig. 3 is the decomposition axonometric drawing of expression corresponding to the package assembly of the alarm device of the embodiment of the invention 2;
Fig. 4 is the action specification figure of Fig. 3, the on-state figure of Fig. 4 (a) indication circuit circuit breaker, Fig. 4 (b) expression with do the movement state diagram that disconnects the alarm device that action links by operating grip, the movement state diagram of Fig. 4 (c) expression and the alarm device of the tripping operation action interlock that causes because of overcurrent.
Below, in conjunction with the accompanying drawings embodiments of the invention are illustrated.
Fig. 1 and Fig. 2 are and the embodiment of the corresponding alarm device of claim 2 of the present invention that the i.e. overcurrent trip of testing circuit circuit breaker action is also exported alarm signal.In the drawings, the 1st, the crust of the device of alarm device is equipped with alarm contact 2, actuator 3 and action bars 4 by illustrated floor plan mode on the base of this crust of the device 1.At this, crust of the device 1 is made of phenol resin molding material, integrally is formed with support foot 1a～1d with this base on its pedestal part, and these support foots are used for above-mentioned each member is installed in assigned position.The 5th, external connection terminals.
At this, alarm contact 2 is equipped with the push button sensitive switch of self return contact (this self return contact is a travelling contact set on the rubber-like contact blade) 2a in being, will be inserted on support foot 1a, the 1b that is located on the crust of the device 1 at the hole 2b that wears on the switch enclosure and is installed on the certain position.In addition, relative with the button 2c of alarm contact 2 and in its place ahead, hinge (hinge) 3a of the actuator 3 that will constitute with the leaf spring material is bearing on the support foot 1c of crust of the device 1, and can freely shake.Action bars 4 is made of insulating material, its shape is the L font, pivotally be bearing on the above-mentioned support foot 1d, and will be located at being combined on the actuator 3 on the one end A in conjunction with pin 4a, other end B is outstanding to the side from crust of the device 1, and on the position of circuit-breaker body of packing into movable contact 6 on the dog 6a (with reference to Fig. 2) that forms mutually opposed.7 is the opening and closing operations handle of circuit-breaker, and 7a is its fulcrum, is provided with dog 7b in the rear end of the first quarter moon shape lug boss of handle 7, and this dog 7b is used for driving action bars (embodiment of the invention 2 is set forth in the back).In addition, about the on-off action that undertaken by 7 pairs of circuit-breakers of operating grip, because of overcurrent produces the tripping operation action of tripping operation, the former patent gazette of delivering is opened in flat 6-52778 number and is elaborated, and omits its explanation at this.
Below, according to Fig. 2 (a)～Fig. 2 (c) action of the alarm device of said structure is illustrated.At this, connection (ON) state of Fig. 2 (a) indication circuit circuit breaker, Fig. 2 (b) represents to make by operating grip 7 state of circuit-breaker disconnection (OFF), the tripping operation operate condition that Fig. 2 (c) expression is tripped because of overcurrent.By common lever operated, closing of power circuit breaker or when disconnecting action, the front end B of the action bars 4 of alarm device separates with the dog 6a of movable contact anchor clamps 6.Therefore, action bars 4, actuator 3 are in free free state, and the interior contacts 2a of alarm contact 2 automatically resets, and button 2c keeps like this, can not exporting alarm signal from alarm device from the outstanding state of switch enclosure.
On the other hand, when circuit-breaker was done the tripping operation action because of overcurrent trip, shown in Fig. 2 (c), the dog 6a of movable contact anchor clamps 6 shook to counter clockwise direction, releases the front end B of action bars 4.Like this, action bars 4 is the center with the fulcrum, shake to clockwise direction, and to clockwise direction drive actions device 3, the button 2c of its front end pushing alarm contact 2.Its result, the contact 2a of alarm contact 2 do the counter-rotating action, and the output alarm signal.In this case, in the time of actuator 3 pushing button 2a, the actuator self that is made of the leaf spring material also produces deflection, because its flexural force, make alarm contact 2 remain on the counter-rotating operating position, and, absorb the pushing stroke part of the surplus that is added on the actuator 3 by action bars 4 by the movable contact anchor clamps 6 of circuit-breaker.In addition, cause the tripping operation action because of overcurrent after, when operating grip 7 was carried out reset operation, movable contact anchor clamps 6 reset to the state of Fig. 2 (a), removed the constraint of action bars 4, and actuator 3 becomes free state again.Like this, the contact 2a of alarm contact 2 automatically resets, and stops the signal that gives the alarm.
Fig. 3, Fig. 4 are the Application Example of expression corresponding to claim 3 of the present invention.Promptly, (embodiment 1 constitutes like this with the formation of the foregoing description 1, only output alarm signal when causing the tripping operation action because of overcurrent of alarm contact) difference, embodiment 2 constitutes like this, only the action bars with the alarm device of packing among the embodiment 1 is replaced with other shape, tripping operation action takes place because of overcurrent trip and when doing to disconnect action by the opening and closing operations handle in circuit-breaker, the contact of alarm contact is done the counter-rotating action, and exports the alarm signal (auxiliary signal) that circuit breaker disconnects to the outside.
Therefore, in this embodiment, compare with the structure of the foregoing description 1, the shape difference of action bars, structure in addition is identical with Fig. 1.Promptly, the global shape of the action bars 40 of Cai Yonging is anchor shape in this embodiment, among leading section A, the B of three place branches, C, leading section A, B are identical with the structure of embodiment 1, actuator 3 is mutually opposed with the dog 6a of the movable contact anchor clamps 6 of circuit-breaker, also has a leading section C outstanding and mutually opposed with the dog 7b of circuit breaker switching operating grip 7 formation from crust of the device.
Below, utilize Fig. 4 (a)～Fig. 4 (c) that the action of the alarm device of this structure is illustrated.At first, circuit-breaker is under connection (ON) state shown in Fig. 4 (a), and identical with the situation described in the embodiment 1, action bars 40, actuator 3 are in the unconfinement state, the contact 2a of alarm contact 2 automatically resets, and button 2b keeps to the outstanding state of the front end of actuator 3.
On the other hand, shown in Fig. 4 (b), make opening and closing operations handle 7 to open position, promptly make swinging operation and when making circuit-breaker do disconnect action to counter clockwise direction, the dog 7b of operating grip 7 releases the leading section C that is contained in the action bars 40 on the alarm device, and action bars 40 is swung to clockwise direction.Like this, actuator 3 pushes the button 2c of alarm contact 2 thereupon moving, and makes contact 2a do the counter-rotating action, and the output alarm signal.That is to say, know that by the alarm enable signal outside circuit-breaker has been in off-state.In addition, shown in Fig. 4 (c), when circuit-breaker is done the overcurrent trip action, the same with the action of embodiment 1, the dog 6a of movable contact anchor clamps 6 releases action bars 40 to clockwise direction, with above-mentioned the same, make the contact 2a of alarm contact 2 do the counter-rotating action by actuator 3, and the output alarm signal.
Can also use like this, the action bars 40 of this embodiment is replaced with the action bars 4 of shape described in the embodiment 1, then 2 output alarm signals when doing the tripping operation action because of overcurrent of alarm contact.
As mentioned above,, compare, have following effect with the alarm device of existing structure according to structure of the present invention.
Promptly, circuit-breaker is being under the common state of connection, the actuator that is contained in the alarm device keeps free state, only when circuit-breaker is done to disconnect action, the action bars that moves along with the action of switching mechanism is the drive actions device, the button of pushing alarm contact makes alarm contact do the counter-rotating action, and the output alarm signal.Because circuit-breaker of the present invention adopts said structure, its effect is as follows:
1) at ordinary times the self return contact in the alarm contact is not applied the pushing load, can prevent on the counter-rotating operating position because of being urged for a long time, produce creep and make the contact blade distortion, the fault in the action that can prevent to automatically reset and so on improves the reliability of device.In addition, be provided with the gap between the movable contact anchor clamps of the front end of action bars and circuit-breaker, the heating of the contact blade of following breaker electrifying and producing can be delivered on the action bars.Can prevent that like this, just thermal deformation because of action bars from causing the misoperation of alarm contact.
2) owing to the force application spring that does not need to set up in the existing structure, thus number of components, assembling number in man-hour correspondingly can be reduced, and can reduce cost.
3) action bars of alarm device is made claim 2,3 described shapes, like this, only pass through the shape of selection operation bar, just can be only when circuit-breaker be done the overcurrent trip action, or when doing overcurrent trip action and passing through operating grip to do to disconnect action, the output alarm signal like this, also can be satisfied user's requirement easily.
4) as described in the claim 4, utilize rubber-like leaf spring made actuator, like this, utilize its deflection surplus to eliminate to pack into the fluctuation of assembly precision of the alarm device in the circuit-breaker and the influence that superfluous stroke produced, and can utilize the flexural force of actuator, positively the button of bulldozing operation alarm contact.
5) about the crust of the device of alarm device, adopt structure as claimed in claim 5, so member is easy to install, improved the assembling of device.
Claims (3)
1. the alarm device of a circuit-breaker, described alarm device is contained in the body of circuit-breaker, be used to catch tripping operation action that circuit breaker causes because of overcurrent or the disconnection action of being undertaken by the opening and closing operations handle, and send alarm signal, the alarm device of described circuit-breaker is to constitute like this, be about to the inner push button alarm contact that self return contact is housed, shake the rod-type actuator and be connected this actuator and action bars that circuit breaker switching is inter-agency in the lump in the charging apparatus shell with the button of described switch relatively disposes, it is characterized in that, under the closing of power circuit breaker state, described actuator keeps free state, when circuit-breaker is done the disconnection action, along with the action of the movable contact anchor clamps of described circuit breaker and the action bars drive actions device that moves, the button of pushing alarm contact, make its interior contacts do the counter-rotating action, in the described alarm device, one end of described action bars is combined on the actuator, make simultaneously the other end that is divided into two branches on the position of breaker body of packing into respectively with the movable contact anchor clamps that are located at circuit breaker on dog and the dog that is located on the opening and closing operations handle mutually opposed, and under the circuit-breaker on-state, between the dog of the front end of action bars and described movable contact anchor clamps, be provided with the gap.
2. the alarm device of circuit-breaker as claimed in claim 1 is characterized in that, in the described alarm device, described actuator is made of rubber-like leaf spring material, and the elastic force of described leaf spring material is greater than the reset force of the button of alarm contact.
3. the alarm device of circuit-breaker as claimed in claim 1, it is characterized in that, in the described alarm device, crust of the device is made of phenol resin molding material, and will support foot and be integrally formed on the shell, this support foot portion is used for respectively alarm contact, actuator and action bars are installed in assigned position.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP75896/1996 | 1996-03-29 | ||
| JP75896/96 | 1996-03-29 | ||
| JP07589696A JP3246322B2 (en) | 1996-03-29 | 1996-03-29 | Circuit breaker alarm |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1164751A CN1164751A (en) | 1997-11-12 |
| CN1077328C true CN1077328C (en) | 2002-01-02 |
Family
ID=13589553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97103345A Expired - Lifetime CN1077328C (en) | 1996-03-29 | 1997-03-21 | alarm device of circuit breaker |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3246322B2 (en) |
| KR (1) | KR100424355B1 (en) |
| CN (1) | CN1077328C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4288868B2 (en) * | 2001-05-28 | 2009-07-01 | 富士電機機器制御株式会社 | Switch device attached to circuit breaker |
| CN101436493B (en) * | 2008-12-05 | 2011-01-12 | 常熟开关制造有限公司(原常熟开关厂） | Auxiliary switch for circuit breaker |
| CN102376498B (en) * | 2010-08-24 | 2014-02-26 | 上海电科电器科技有限公司 | Auxiliary alarm switch |
| CN102110553B (en) * | 2011-03-07 | 2013-01-16 | 法泰电器（江苏）股份有限公司 | Operating mechanism of selective protection switch |
| CN102779699A (en) * | 2012-07-16 | 2012-11-14 | 无锡市凯旋电机有限公司 | Manual switch-on/off button for circuit breaker energy storage mechanism |
| KR102299858B1 (en) | 2017-03-15 | 2021-09-08 | 엘에스일렉트릭 (주) | Magnetic trip mechanism for circuit breaker |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0652778A (en) * | 1992-05-12 | 1994-02-25 | Fuji Electric Co Ltd | Circuit breaker |
-
1996
- 1996-03-29 JP JP07589696A patent/JP3246322B2/en not_active Expired - Lifetime
-
1997
- 1997-03-21 CN CN97103345A patent/CN1077328C/en not_active Expired - Lifetime
- 1997-03-27 KR KR1019970010895A patent/KR100424355B1/en not_active IP Right Cessation
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0652778A (en) * | 1992-05-12 | 1994-02-25 | Fuji Electric Co Ltd | Circuit breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| KR970067433A (en) | 1997-10-13 |
| JP3246322B2 (en) | 2002-01-15 |
| JPH09265890A (en) | 1997-10-07 |
| CN1164751A (en) | 1997-11-12 |
| KR100424355B1 (en) | 2004-06-26 |
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Address after: Tokyo, Japan Patentee after: Fuji electric property management Co. Address before: Tokyo, Japan Patentee before: FUJI ELECTRIC FA COMPONENTS & SYSTEMS Co.,Ltd. |
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