CN110459445A - Thermal overload release rated current method of adjustment and thermal overload release, breaker - Google Patents
Thermal overload release rated current method of adjustment and thermal overload release, breaker Download PDFInfo
- Publication number
- CN110459445A CN110459445A CN201910886948.4A CN201910886948A CN110459445A CN 110459445 A CN110459445 A CN 110459445A CN 201910886948 A CN201910886948 A CN 201910886948A CN 110459445 A CN110459445 A CN 110459445A
- Authority
- CN
- China
- Prior art keywords
- thermal overload
- bimetal leaf
- overload release
- rated current
- thermal
- 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
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
-
- 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
- H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
- H01H71/7427—Adjusting only the electrothermal mechanism
Abstract
The invention discloses a kind of thermal overload release rated current method of adjustment, the thermal overload release includes the bimetal leaf being serially connected in circuit, and the bimetal leaf has fixing end and free end；The length of circuit part is accessed between fixing end and free end by changing the bimetal leaf to adjust the resistance that the bimetal leaf accesses circuit part, and then realizes the adjustment to the thermal overload release rated current.The invention also discloses a kind of thermal overload release and a kind of breakers.Compared with prior art, the thermal tripping characteristic requirements for meeting a variety of different rated current specifications with the bimetal leaf of same specification can be achieved in the present invention, reduce material quantity, reduce cost of parts and management cost, facilitate production and processing；Simultaneously the promotion of cage electric current can also be realized by reducing the calorific value length of bimetal leaf.
Description
Technical field
The present invention relates to a kind of thermal overload release more particularly to a kind of thermal overload release rated current methods of adjustment.
Background technique
As component extremely important in circuit system, overload or short circuit and under-voltage etc. can occur in the line for breaker
Automatic shutdown circuit when failure prevents fault spread, guarantees safe operation, therefore had been more and more widely used.It is existing
The thermomagnetic circuit breaker thermal overload release of realization overload long delay protection that generally includes to be made of bimetallic element and
The magnetictrip of the realization wink ejector half short-circuit protection of electromagnet form detects abnormal current by buckle releaser action actuation open circuit
Device tripping, cuts off circuit.
The core of thermal overload release is bimetal leaf, and bimetal leaf is by two or more metals with suitable performance
Or a kind of composite material, also referred to as thrermostatic bimetal-plate composed by other materials, since the thermal expansion coefficient of each constituent element layer is different, when
When temperature change, the deformation of active layers is greater than the deformation of passive layer, so that the entirety of bimetal leaf will be to passive layer side
Bending, then the curvature of this composite material changes to generate deformation.Bimetal leaf usual one in thermal overload release
Fixed (referred to as fixing end) is held, tripping mechanism is driven with movement caused by deformation by the other end (referred to as fixing end)
Movement is to realize tripping.
In thermal overload release there are three types of the heating methods of bimetal leaf: directly heating, indirect heating and composite heating.Institute
Meaning directly heats mode and refers to that bimetal leaf is directly connected in circuit, is made using heat caused by bimetal leaf self-resistance
For heating source；So-called indirect heating manner refers to that bimetal leaf itself does not access in circuit, but rely on other heating elements into
Row heating；So-called composite heating mode refers to that in addition to bimetal leaf itself is directly connected in circuit, there are also other electric heating members
Part heats bimetal leaf.The most widely used at present for low current specification is to directly heat and composite heating side
Formula applies in general to 10-25A current specification wherein directly heating, and is generated heat using the resistance loss of bimetallic element itself, compound
Heating method applies in general to 6A and more low current specification, not only by bimetal leaf itself, while being added by heating element
Heat.
However, whether use directly heats or composite heating mode, the heat that meet different rated current specifications are de-
Characteristic requirements are detained, must all use the bimetal leaf of different size, the more thermal trip of produced current specification, then institute at present
The bimetal leaf specification needed is also more, this directly results in being significantly increased for material variety, increases the difficulty of production management,
Improve production cost.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and to provide a kind of thermal overload release is specified
Current adjusting method, the thermal tripping characteristic that a variety of different rated current specifications can be met by the bimetal leaf of same specification are wanted
It asks.
Technical solution proposed by the invention is specific as follows:
Thermal overload release rated current method of adjustment, the thermal overload release include the bimetal leaf being serially connected in circuit,
The bimetal leaf has fixing end and free end；Electricity is accessed between fixing end and free end by changing the bimetal leaf
The length of road part adjusts the resistance of bimetal leaf access circuit part, and then realizes to the thermal overload release volume
The adjustment of constant current, to realize multiple thermal overload releases that there are different rated current with the building of the same bimetal leaf.
Following technical scheme can also be obtained based on identical invention thinking:
A kind of thermal overload release, including the bimetal leaf being serially connected in circuit, the bimetal leaf has fixing end and freedom
End；Rated current adjustment mechanism is provided in the thermal overload release, for the fixing end by changing the bimetal leaf
The length of circuit part is accessed between free end to adjust the resistance of the bimetal leaf access circuit part, and then realization pair
The adjustment of the thermal overload release rated current.
Preferably, the rated current adjustment mechanism includes being set between the fixing end and free end of the bimetal leaf
Multiple contacts that are electrically connected of different location, the contact that is respectively electrically connected correspond to different rated current.
It is further preferred that the contact that is electrically connected is threaded hole.
Preferably, the bimetal leaf accesses circuit by flexible connection.
Preferably, one end that the flexible connection is electrically connected with bimetal leaf is provided with the rigid line part greater than joint face.
Preferably, the free end of the bimetal leaf is provided with and the adjustable actuated piece of tripping mechanism activated gap, use
The tripping mechanism of the thermal overload release is driven to act in the thermal deformation with the bimetal leaf.
It is further preferred that the actuated piece is screw assembly.
A kind of breaker, including thermal overload release, the thermal overload release are heat described in any of the above technical solution
Overload release.
Compared with prior art, technical solution of the present invention has the advantages that
The present invention accesses the length of circuit part between the fixing end and free end by changing bimetal leaf to adjust bimetallic
Piece accesses the resistance of circuit part, and then realizes adjusting, it can be achieved that with same specification to thermal overload release rated current
Bimetal leaf meets the thermal tripping characteristic requirements of a variety of different rated current specifications, reduces material quantity, reduces part
Cost and management cost facilitate production and processing；Simultaneously shell can also be realized by reducing the calorific value length of bimetal leaf
The promotion of frame electric current.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the thermal overload release of embodiment one；
Fig. 2~Fig. 4 is respectively structural representation of the thermal overload release of embodiment one when rated current is 100A, 80A, 63A
Figure；
Fig. 5 is the structural schematic diagram of the thermal overload release of embodiment two；
Fig. 6 is the Structure explosion diagram of the thermal overload release of embodiment two.
It is marked in figure comprising the following drawings:
1, contact system, 2, bimetallic element, 3, flexible connection, 4, joint cover, 21, actuated piece, 22, supporter, 23, bimetallic
Piece, 231, fixing end, 232, free end, 233, threaded hole, 31, one end of flexible connection, 311, rigid line part, 312, threaded hole,
313, screw.
Specific embodiment
It needs for the thermal overload release of different rated current present in the prior art using different size bimetallic
The deficiency of piece, resolving ideas of the invention are that circuit part is accessed between the fixing end and free end of bimetal leaf by changing
Length adjusts the resistance of bimetal leaf access circuit part, and then realizes and come to the adjustment of thermal overload release rated current,
To realize multiple thermal overload releases that there are different rated current with the building of the same bimetal leaf；It can be achieved with same rule
The bimetal leaf of lattice meets the thermal tripping characteristic requirements of a variety of different rated current specifications, reduces material quantity, reduces
Cost of parts and management cost facilitate production and processing；It simultaneously can also be by reducing the calorific value length of bimetal leaf come real
The promotion of existing cage electric current.
Thermal overload release of the invention, including the bimetal leaf being serially connected in circuit, the bimetal leaf, which has, to be fixed
End and free end；Rated current adjustment mechanism is provided in the thermal overload release, for by changing the bimetal leaf
Fixing end and free end between access the length of circuit part to adjust the resistance of bimetal leaf access circuit part, into
And realize the adjustment to the thermal overload release rated current.
Preferably, the rated current adjustment mechanism includes being set between the fixing end and free end of the bimetal leaf
Multiple contacts that are electrically connected of different location, the contact that is respectively electrically connected correspond to different rated current.Respectively be electrically connected specified electricity corresponding to contact
Stream can first pass through in advance theoretical calculation and experimental calibration obtains, to improve the accuracy of rated current adjustment
The mode for being electrically connected contact access circuit can be used the modes such as welding, riveting, bonding, crimping, however such mode pair
Inconvenient in the change for the connecting point position that is electrically connected, for the ease of rated current adjustment, the contact that is electrically connected is preferably threaded hole, is passed through
Bimetal leaf is accessed circuit by corresponding screw assembly, to be convenient to change the tie point position of bimetal leaf and circuit.
The bimetal leaf can access circuit by the hard connection of rigid conductor structure, can also pass through fexible conductor knot
The flexible connection of structure accesses circuit；Consider from flexible layout and occupied space angle, it is preferred to use flexible connection.The hard connection or soft
Connection is alternatively arranged as additional heating element, to realize so-called composite heating mode；It, can also be into one in order to increase calorific value
It walks and is greater than the rigid line part of joint face in one end that flexible connection is electrically connected with bimetal leaf setting.
Preferably, the free end of the bimetal leaf is provided with the actuated piece of adjustable in length, for the bimetallic
The thermal deformation of piece drives the tripping mechanism of the thermal overload release to act.From a cost perspective, the actuated piece is preferably adopted
Use screw assembly.
For the ease of public understanding, below by two specific embodiments and in conjunction with attached drawing to technical solution of the present invention into
Row is described in detail:
Embodiment one,
The thermal overload release of the present embodiment is as shown in Figure 1, include bimetallic element 2, the bimetallic element 2 includes bimetallic
The fixing end 231 of piece 23 and supporter 22, bimetal leaf 23 is fixed on supporter 22, and the free end 232 of bimetal leaf 23 is set
Have an actuated piece 21, the actuated piece of the present embodiment uses screw assembly, on the one hand can neatly adjustment length to realize thermal tripping spy
The adjustment of property, another aspect structure is simple, low in cost.After 23 heated bending of bimetal leaf, actuated piece 21 activates breaker
The tripping of tripping mechanism (not shown).1 in figure is contact system (moving contact is only shown in figure), and 3 be flexible connection.
Specifically, the fixing end 231 of bimetal leaf 23 is fixed on supporter 22 by way of welding or riveting, double gold
The free end 232 for belonging to piece 23 passes through realization between flexible connection 3 and joint cover 4 and is electrically connected.Therefore, the breaker of present embodiment exists
Under the closed state that contact system 1 is closed, current path is to flow through contact system from the external terminal (not shown) of breaker
System 1 is flowed via supporter 22 and along the length direction of bimetal leaf 23, after through flexible connection 3, is flowed to joint cover 4.It is double
The free end 232 of sheet metal 23 is for 23 heated bending actuation trip mechanism of bimetal leaf so that circuit breaker tripping.
As shown in Figure 2 to 4, contact system 1 and bimetal leaf 23 are electrically connected by flexible connection 3, this flexible connection 3 and double
The electrical connection point of sheet metal 23 is fixed on the fixing end 231 of bimetal leaf 23, and the present embodiment is by changing another flexible connection 3
One end 31 meets different current specification thermal characteristics demands from the electrically connecting position of bimetal leaf 23.As shown in Fig. 2, bimetal leaf
The length that circuit part is accessed between 23 fixing end 231 and free end 232 is shorter, and bimetal leaf 23 accesses circuit part at this time
Resistance it is also smaller, then rated current is larger, rated current corresponding to the thermal overload release of the connection status be 100A.Such as
Shown in Fig. 3, length ratio Fig. 2 that circuit part is accessed between the fixing end 231 and free end 232 of bimetal leaf 23 is slightly long, at this time
The resistance that bimetal leaf 23 accesses circuit part is also larger, then rated current is also smaller, the thermal overload release of the connection status
Corresponding rated current is 80A.As shown in figure 4, accessing circuit between the fixing end 231 and free end 232 of bimetal leaf 23
Partial length is longer, and the resistance of the circuit part of the access of bimetal leaf 23 at this time is also bigger, then rated current is smaller, the connection shape
Rated current corresponding to the thermal overload release of state is 63A.In this way, the thermal trip of different rated current can be used it is same
Bimetal leaf reduces material quantity, reduces cost of parts and management cost, facilitates production and processing.
It can be as shown in Fig. 2, setting be greater than the hard of joint face in one end that flexible connection 3 is connect with bimetallic element 23 31
Line part 311, the rigid line part 311 can increase total calorific value.
Embodiment two,
One end 31 of flexible connection 3 in embodiment one is by the modes such as welding, riveting, bonding, crimping and bimetallic element 23
Realize mechanical connection and electrical connection, although the bimetal leaf of same specification may be implemented for different rated current in such mode
Thermal overload release；But for same thermal overload release, if to adjust its rated current, to change and be electrically connected contact just
It is inconvenient.To solve this problem, as shown in Figure 5, Figure 6, fixing end 231 and freedom of the present embodiment in bimetal leaf 23
Multiple threaded holes 233 are provided with (corresponding to different rated current) at different location between end 232, and in flexible connection 3
Corresponding threaded hole 312 is set on one end 31, in this way, being by threaded hole 233 and threaded hole 312 and corresponding screw 313
It is convenient to realize that one end 31 of flexible connection 3 is realized mechanical connection with bimetallic element 23 and is electrically connected, and easy to disassemble and tune
It is whole, and then by fixing the adjustment to realize same thermal overload release rated current from the different cooperations of threaded hole 233.This reality
The rest part and principle for applying example are the same as example 1, and details are not described herein again.
Claims (9)
1. thermal overload release rated current method of adjustment, the thermal overload release includes the bimetallic being serially connected in circuit
Piece, the bimetal leaf have fixing end and free end；It is characterized in that, passing through the fixing end of the change bimetal leaf and oneself
The resistance of the bimetal leaf access circuit part is adjusted by accessing the length of circuit part between end, and then is realized to described
The adjustment of thermal overload release rated current, so that realizing has the multiple of different rated current with the building of the same bimetal leaf
Thermal overload release.
2. a kind of thermal overload release, including the bimetal leaf being serially connected in circuit, the bimetal leaf is with fixing end and certainly
By holding；It is characterized in that, rated current adjustment mechanism is provided in the thermal overload release, for by changing double gold
Belong to and accesses the length of circuit part between the fixing end and free end of piece to adjust the electricity of the bimetal leaf access circuit part
Resistance, and then realize the adjustment to the thermal overload release rated current.
3. thermal overload release as claimed in claim 2, which is characterized in that the rated current adjustment mechanism includes being set to institute
State multiple contacts that are electrically connected of different location between the fixing end of bimetal leaf and free end, the contact that is respectively electrically connected corresponds to different specified
Electric current.
4. thermal overload release as claimed in claim 3, which is characterized in that the contact that is electrically connected is threaded hole.
5. the thermal overload release as described in any one of claim 2~4, which is characterized in that the bimetal leaf passes through flexible connection
Access circuit.
6. thermal overload release as claimed in claim 5, which is characterized in that one end that the flexible connection is electrically connected with bimetal leaf
It is provided with the rigid line part greater than joint face.
7. the thermal overload release as described in any one of claim 2~4, which is characterized in that the free end of the bimetal leaf is set
Be equipped with the adjustable actuated piece of tripping mechanism activated gap, for driving the thermal overload with the thermal deformation of the bimetal leaf
The tripping mechanism of buckle releaser acts.
8. thermal overload release as claimed in claim 7, which is characterized in that the actuated piece is screw assembly.
9. a kind of breaker, including thermal overload release, which is characterized in that the thermal overload release is claim 2~8 times
One thermal overload release.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910886948.4A CN110459445A (en) | 2019-09-19 | 2019-09-19 | Thermal overload release rated current method of adjustment and thermal overload release, breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910886948.4A CN110459445A (en) | 2019-09-19 | 2019-09-19 | Thermal overload release rated current method of adjustment and thermal overload release, breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110459445A true CN110459445A (en) | 2019-11-15 |
Family
ID=68492444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910886948.4A Pending CN110459445A (en) | 2019-09-19 | 2019-09-19 | Thermal overload release rated current method of adjustment and thermal overload release, breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110459445A (en) |
-
2019
- 2019-09-19 CN CN201910886948.4A patent/CN110459445A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6001608B2 (en) | Circuit breaker trip device | |
| EP3751589A1 (en) | Temperature controller with thermal protection | |
| CN101976640B (en) | Low-voltage breaker tripper | |
| CN103903921A (en) | Overload protection device and circuit breaker thermo-magnetic adjustable tripping device containing same | |
| KR101647915B1 (en) | Circuit breaker | |
| CN202772081U (en) | Thermal electromagnetic system of miniature circuit breaker | |
| CN110459445A (en) | Thermal overload release rated current method of adjustment and thermal overload release, breaker | |
| US9406474B2 (en) | Circuit breaker heaters and translational magnetic systems | |
| CN105280450B (en) | Circuit-breaker | |
| KR910008011B1 (en) | Circuit breaker over current tripping devices | |
| JP4905112B2 (en) | Circuit breaker overcurrent trip device | |
| CN210156335U (en) | Thermal overload release and circuit breaker | |
| CN205564680U (en) | Circuit breaker | |
| CN108054064A (en) | A kind of miniature circuit breaker | |
| CN204011322U (en) | Release for circuit breaker | |
| CN207852598U (en) | A kind of miniature circuit breaker | |
| CN201838530U (en) | Tripping device of low-voltage circuit breaker | |
| CN100573774C (en) | Selective protection switch | |
| CN206864417U (en) | A kind of miniature circuit breaker moving contact thermal trip system architecture | |
| CN107154327A (en) | Overload release, Thermomagnetic type trip gear and breaker for breaker | |
| CN220456332U (en) | Overload tripping structure and circuit breaker | |
| CN218182155U (en) | Thermal overload release and circuit breaker | |
| CN211045361U (en) | Circuit breaker with arc extinguishing mechanism | |
| CN203192722U (en) | Overload protection apparatus, thermomagnetic adjustability release, and circuit breaker | |
| CN216698261U (en) | Thermal overload release of circuit breaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |