CN108231501A - A kind of hydraulic pressure dynamic iron core electromagnet and breaker - Google Patents
A kind of hydraulic pressure dynamic iron core electromagnet and breaker Download PDFInfo
- Publication number
- CN108231501A CN108231501A CN201810029241.7A CN201810029241A CN108231501A CN 108231501 A CN108231501 A CN 108231501A CN 201810029241 A CN201810029241 A CN 201810029241A CN 108231501 A CN108231501 A CN 108231501A
- Authority
- CN
- China
- Prior art keywords
- iron core
- dynamic iron
- hydraulic pressure
- oil cylinder
- elastic component
- 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.)
- Granted
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 158
- 239000003921 oil Substances 0.000 claims abstract description 41
- 230000003068 static effect Effects 0.000 claims abstract description 35
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 13
- 230000007246 mechanism Effects 0.000 claims description 13
- 230000000670 limiting effect Effects 0.000 claims description 8
- 230000000694 effects Effects 0.000 description 12
- 230000009471 action Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000010727 cylinder oil Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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
- H01H71/24—Electromagnetic mechanisms
- H01H71/34—Electromagnetic mechanisms having two or more armatures controlled by a common winding
- H01H71/345—Electromagnetic mechanisms having two or more armatures controlled by a common winding having a delayed movable core and a movable armature
-
- 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
- H01H71/44—Automatic release mechanisms with or without manual release having means for introducing a predetermined time delay
Abstract
The present invention provides a kind of hydraulic pressure dynamic iron core electromagnet and breakers, are related to breaker technical field.Breaker includes above-mentioned hydraulic pressure dynamic iron core electromagnet.In hydraulic pressure dynamic iron core electromagnet, coil is wrapped on bobbin；Static iron core is fixedly connected on bobbin；Oil cylinder is movably connected in the inside of bobbin, and the first dynamic iron core is fixedly connected on the opening of oil cylinder, and the second dynamic iron core is movably connected in the inside of oil cylinder；Hydraulic oil is filled in the inside of oil cylinder；Catch bar is fixedly connected through static iron core and with the first dynamic iron core；First elastic component is arranged between static iron core and the first dynamic iron core；Second elastic component is arranged between the first dynamic iron core and the second dynamic iron core.Hydraulic pressure dynamic iron core electromagnet is affected by temperature smaller, control precisely.
Description
Technical field
The present invention relates to breaker technical field, in particular to a kind of hydraulic pressure dynamic iron core electromagnet and breaker.
Background technology
It is most in existing miniature circuit breaker that tripping mechanism is pushed using dynamic iron core electromagnet, to play rapid disconnecting circuit
Effect.Existing dynamic iron core electromagnet miniature circuit breaker, long delay action is most of to heat bimetal leaf, double gold by electric current
Deformation pushes tripping mechanism disconnecting circuit after belonging to piece heating, plays the role of the disconnecting circuit that is delayed, restores after bimetal leaf cooling
Original state.
But the deflection of bimetal leaf is influenced by environment temperature, leads to be passed through the size of electric current to bimetal leaf
Shape control is inaccurate, influences breaker access or the control performance of open circuit.
Therefore, design one kind is not affected by temperature, controls accurately dynamic iron core electromagnet, can solve to be widely used at present
Miniature circuit breaker actuation time it is accurate the problem of.
Invention content
The present invention provides a kind of hydraulic pressure dynamic iron core electromagnet and breaker, is not affected by temperature, controls precisely.
The first technical solution provided by the invention：
The hydraulic pressure dynamic iron core electromagnet includes bobbin, coil, catch bar, static iron core, the first elastic component, the second elasticity
Part, the first dynamic iron core, the second dynamic iron core, oil cylinder and hydraulic oil；
The coil is wrapped on the bobbin；The static iron core is fixedly connected on the bobbin；The oil cylinder
It is movably connected in the inside of the bobbin, first dynamic iron core is fixedly connected on the opening of the oil cylinder, and described second
Dynamic iron core is movably connected in the inside of the oil cylinder；The hydraulic oil is filled in the inside of the oil cylinder；
The catch bar is fixedly connected through the static iron core and with first dynamic iron core；First elastic component is set
It puts between the static iron core and first dynamic iron core；Second elastic component is arranged on first dynamic iron core and described the
Between two dynamic iron cores.
Further, first elastic component and second elastic component are resetting spring.
Further, it is arranged at intervals on the bobbin there are two limiting section, the coil is arranged on two limitings
Between portion.
Further, the bobbin has through-hole, and the static iron core is fixedly connected on one end of the through-hole.
Further, first elastic component is set on the catch bar.
Further, the first groove is offered on the static iron core, first elastic component is inserted into first groove.
Further, first dynamic iron core includes connection main body and is connected to the of the connection main body both sides
One connecting pin and second connection end, the connection main body are fixedly connected on the opening of the oil cylinder, the first connecting pin position
It is connect outside the oil cylinder and with the catch bar, the second connection end is located inside the oil cylinder, second elasticity
One end of part is set in the second connection end.
Further, the second groove is offered in second dynamic iron core, the other end of second elastic component is arranged on
In second groove.
Further, the oil cylinder and second dynamic iron core are barrel-like structure.
Second of technical solution provided by the invention：
A kind of breaker includes tripping mechanism and the hydraulic pressure dynamic iron core electromagnet described in the first technical solution, the hydraulic pressure
Dynamic iron core electromagnet is used to push the tripping mechanism with disconnecting circuit.
The advantageous effect of hydraulic pressure dynamic iron core electromagnet and breaker provided by the invention is：
1. the movement of the catch bar by the static iron core to the magnetic force of first dynamic iron core, first elastic component and
The elastic force and the hydraulic oil of second elastic component act synergistically to realize to the resistance of second dynamic iron core, described to push away
The movement of lever is not affected by temperature, by the current control in the coil, you can is accurately controlled the catch bar
Movement.The access of breaker or the control of open circuit are accurate.
2. during first dynamic iron core detaches after being attracted with second dynamic iron core, the hydraulic oil can play
The effect of the second dynamic iron core movement is hindered, slows down the catch bar speed, plays the effect of delay.The delay of breaker
Breaking is functional.
Description of the drawings
It in order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range, for those of ordinary skill in the art, without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the structure diagram of hydraulic pressure dynamic iron core electromagnet provided in an embodiment of the present invention.
Fig. 2 is structure diagram when being not powered on of hydraulic pressure dynamic iron core electromagnet provided in an embodiment of the present invention.
Fig. 3 is the structure diagram of Fig. 2 center line coil inner bodies.
Fig. 4 is that structure when being passed through electric current overrate of hydraulic pressure dynamic iron core electromagnet provided in an embodiment of the present invention is shown
It is intended to.
Icon：1- hydraulic pressure dynamic iron core electromagnet；2- bobbins；21- limiting sections；22- through-holes；3- coils；4- catch bars；5-
Static iron core；The first grooves of 51-；The first elastic components of 6-；The second elastic components of 7-；The first dynamic iron cores of 8-；81- connection main bodys；82- first
Connecting pin；83- second connection ends；9- hydraulic oil；The second dynamic iron cores of 10-；The second grooves of 101-；11- oil cylinders.
Specific embodiment
Purpose, technical scheme and advantage to make the embodiment of the present invention are clearer, below in conjunction with the embodiment of the present invention
In attached drawing, the technical solution in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be configured to arrange and design with a variety of different.
Therefore, below the detailed description of the embodiment of the present invention to providing in the accompanying drawings be not intended to limit it is claimed
The scope of the present invention, but be merely representative of the present invention selected embodiment.Based on the embodiments of the present invention, this field is common
Technical staff's all other embodiments obtained without creative efforts belong to the model that the present invention protects
It encloses.
It should be noted that：Similar label and letter represents similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need to that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it is to be understood that term " " center ", " on ", " under ", "left", "right", " vertical ",
The orientation or position relationship of the instructions such as " level ", " interior ", " outer " are based on orientation shown in the drawings or position relationship or are somebody's turn to do
Invention product using when the orientation usually put or position relationship or those skilled in the art orientation or position that usually understand
Relationship is put, be for only for ease of the description present invention and simplifies description rather than instruction or implies that signified equipment or element are necessary
With specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second ", " third " etc. are only used for distinguishing description, and it is not intended that instruction or hint
Relative importance.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ",
" installation ", " connected ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or one
Connect to body；Can be mechanical connection or electrical connection；It can be directly connected, it can also be indirect by intermediary
It is connected, can is the connection inside two elements.For the ordinary skill in the art, on being understood with concrete condition
State the concrete meaning of term in the present invention.
It please refers to Fig.1 and Fig. 2, present embodiments provides a kind of hydraulic pressure dynamic iron core electromagnet 1, hydraulic pressure dynamic iron core electromagnet 1
It is dynamic including bobbin 2, coil 3, catch bar 4, static iron core 5, the first elastic component 6, the second elastic component 7, the first dynamic iron core 8, second
Iron core 10, oil cylinder 11 and hydraulic oil 9.
Coil 3 is wrapped on bobbin 2.It is arranged at intervals on bobbin 2 there are two limiting section 21, coil 3 is arranged on two
Between limiting section 21, so as to which coil 3 be made to be firmly placed on bobbin 2.
Static iron core 5 is fixedly connected on bobbin 2.Oil cylinder 11 is movably connected in the inside of bobbin 2.Specifically, coil
Frame 2 has through-hole 22, and static iron core 5 is fixedly connected on one end of through-hole 22.
The opening of oil cylinder 11 is towards static iron core 5.First dynamic iron core 8 is fixedly connected on the opening of oil cylinder 11, the second dynamic iron
Core 10 is movably connected in the inside of oil cylinder 11.11 and second dynamic iron core 10 of oil cylinder is barrel-like structure.Hydraulic oil 9 is filled in oil cylinder
11 inside.
Catch bar 4 runs through static iron core 5, and catch bar 4 can be slided with respect to static iron core 5, and catch bar 4 is fixed with the first dynamic iron core 8
Connection.First elastic component 6 is arranged between 5 and first dynamic iron core 8 of static iron core.Second elastic component 7 be arranged on the first dynamic iron core 8 with
Between second dynamic iron core 10.
Preferably, the first elastic component 6 and the second elastic component 7 are resetting spring.First elastic component 6 is set in catch bar 4
On.The first groove 51 is offered on static iron core 5, the first elastic component 6 is inserted into the first groove 51.
First dynamic iron core 8 includes connection main body 81 and 82 He of the first connecting pin for being connected to 81 both sides of connection main body
Second connection end 83, connection main body 81 are fixedly connected on the opening of oil cylinder 11, and the first connecting pin 82 is located at outside oil cylinder 11, simultaneously
It is connect with catch bar 4, second connection end 83 is located inside oil cylinder 11.One end of second elastic component 7 is set in second connection end 83
On.The second groove 101 is offered in second dynamic iron core 10, the other end of the second elastic component 7 is arranged in the second groove 101.
The course of work of hydraulic pressure dynamic iron core electromagnet 1 provided in this embodiment：
1. coil 3 is not powered on stream, as shown in Fig. 2, under the elastic force effect of the first elastic component 6, oil cylinder 11 is supported on
In bobbin 2.Under the elastic force effect of the second elastic component 7, the second dynamic iron core 10 is supported on the bottom of oil cylinder 11.
2. coil 3 is passed through electric current less than or equal to rated value, have one between the first dynamic iron core 8 and the second dynamic iron core 10
Fixed attraction, but attraction is not enough to overcome the elastic force of the second elastic component 7 and make the first dynamic iron core 8 and the second dynamic iron at this time
Core 10 is attracted, so, the second dynamic iron core 10 moves a certain distance rear, holding to the first dynamic iron core 8 and balances.
Equally, the attraction between 5 and first dynamic iron core 8 of static iron core is not enough to overcome the elastic force of the first elastic component 6, therefore
It does not move.Second dynamic iron core 10 and the second static iron core 8 under the action of magnetic adhesion, the second dynamic iron core 10 in oil cylinder 11 slowly
After moving to reach certain distance, keep balance.Certainly since the suction-combining force is too small, the first dynamic iron core 8 may also be with respect to static iron core 5 not
It is mobile.That is, catch bar 4 does not move or moves small distance relative to static iron core 5.
3. coil 3 is passed through electric current more than rated value, as shown in figure 4, having between the first dynamic iron core 8 and the second dynamic iron core 10
There are enough attractions, the first dynamic iron core 8 is made to be attracted with the second dynamic iron core 10, enhance static iron core 5 to the first dynamic iron core 8 and
The suction-combining force of two dynamic iron cores 10 makes the first dynamic iron core 8 and the second dynamic iron core 10 that oil cylinder 11 be driven to be quickly moving toward static iron core 5, drives
Catch bar 4 is quickly displaced outwardly.
After 4. coil 3 powers off, under the elastic force effect of the first elastic component 6, oil cylinder 11 is gradually to the direction far from static iron core 5
It is mobile.Meanwhile under the elastic force effect of the second elastic component 7, the first dynamic iron core 8 is drifted apart from the second dynamic iron core 10, makes second
Dynamic iron core 10 shifts to the bottom of oil cylinder 11.Hydraulic oil 9 to the second dynamic iron core 10 have certain resistance, make the second dynamic iron core 10 to
The direction movement of 11 bottom of oil cylinder is slower, and the second elastic component 7 is made to improve the elastic force of the first dynamic iron core 8.But the second elastic component
The elastic force of 7 pair of first dynamic iron core 8 is less than elastic force of first elastic component 6 to the first dynamic iron core 8, so, the first dynamic iron core 8 drives oil
Cylinder 11 is slowly moved to the inside of bobbin 2.
The present embodiment also provides a kind of breaker, and breaker includes tripping mechanism and above-mentioned hydraulic pressure dynamic iron core electromagnet 1, liquid
Iron core electromagnet 1 is pressed for pushing tripping mechanism with disconnecting circuit.
Specifically, the coil 3 in hydraulic pressure dynamic iron core electromagnet 1 is passed through electric current more than after rated value, catch bar 4 is from static iron core
It is stretched out in 5 and hits tripping mechanism, tripping mechanism is made to be detached from circuit, play the effect of disconnecting circuit.In hydraulic pressure dynamic iron core electromagnet 1
Coil 3 be passed through electric current less than electric current is not passed through after rated value or, catch bar 4 is motionless in bobbin 2.
In other implementations, it is not passed through when the coil 3 in hydraulic pressure dynamic iron core electromagnet 1 is passed through electric current less than rated value or
During electric current, catch bar 4 is not protruding, and tripping mechanism is made to keep original state, and the coil 3 in hydraulic pressure dynamic iron core electromagnet 1 is logical
Enter electric current and hit tripping mechanism more than after rated value, catch bar 4 is stretched out from static iron core 5, make tripping mechanism disconnecting circuit.This hair
The hydraulic pressure dynamic iron core electromagnet 1 of bright offer and the advantageous effect of breaker are：
1. the movement of catch bar 4 is by static iron core 5 to the magnetic force, the first elastic component 6 and the second elastic component 7 of the first dynamic iron core 8
Elastic force and hydraulic oil 9 act synergistically to realize to the resistance of the second dynamic iron core 10, the movement of catch bar 4 is hardly by temperature
It influences, by the current control in coil 3, you can be accurately controlled the movement of catch bar 4.
2. in 10 attracting process of the first dynamic iron core 8 and the second dynamic iron core, hydraulic oil 9, which can play, hinders the second dynamic iron core 10
The effect of movement makes the delay under the action of magnetic field force actuation of the second dynamic iron core 10 reach the first dynamic iron core 8, completes long delay and move
The effect of work.The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, that is made any repaiies
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of hydraulic pressure dynamic iron core electromagnet, which is characterized in that the hydraulic pressure dynamic iron core electromagnet includes bobbin (2), coil
(3), catch bar (4), static iron core (5), the first elastic component (6), the second elastic component (7), the first dynamic iron core (8), the second dynamic iron core
(10), oil cylinder (11) and hydraulic oil (9)；
The coil (3) is wrapped on the bobbin (2)；The static iron core (5) is fixedly connected on the bobbin (2)；
The oil cylinder (11) is movably connected in the inside of the bobbin (2), and first dynamic iron core (8) is fixedly connected on the oil cylinder
(11) opening, second dynamic iron core (10) are movably connected in the inside of the oil cylinder (11)；Hydraulic oil (9) filling
In the inside of the oil cylinder (11)；
The catch bar (4) is fixedly connected through the static iron core (5) and with first dynamic iron core (8)；First elasticity
Part (6) is arranged between the static iron core (5) and first dynamic iron core (8)；Second elastic component (7) is arranged on described
Between one dynamic iron core (8) and second dynamic iron core (10).
2. hydraulic pressure dynamic iron core electromagnet according to claim 1, which is characterized in that first elastic component (6) and described
Second elastic component (7) is resetting spring.
3. hydraulic pressure dynamic iron core electromagnet according to claim 1, which is characterized in that be arranged at intervals on the bobbin (2)
There are two limiting section (21), the coil (3) is arranged between two limiting sections (21).
4. hydraulic pressure dynamic iron core electromagnet according to claim 3, which is characterized in that the bobbin (2) has through-hole
(22), the static iron core (5) is fixedly connected on one end of the through-hole (22).
5. hydraulic pressure dynamic iron core electromagnet according to claim 2, which is characterized in that first elastic component (6) is set in
On the catch bar (4).
6. hydraulic pressure dynamic iron core electromagnet according to claim 5, which is characterized in that is offered on the static iron core (5)
One groove (51), first elastic component (6) are inserted into first groove (51).
7. hydraulic pressure dynamic iron core electromagnet according to claim 2, which is characterized in that first dynamic iron core (8) is including even
It connects main body (81) and is connected to connection first connecting pin (82) of main body (81) both sides and second connection end (83),
The connection main body (81) is fixedly connected on the opening of the oil cylinder (11), and first connecting pin (82) is positioned at the oil cylinder
(11) external and connect with the catch bar (4), the second connection end (83) is inside the oil cylinder (11), and described the
One end of two elastic components (7) is set in the second connection end (83).
8. hydraulic pressure dynamic iron core electromagnet according to claim 7, which is characterized in that opened up on second dynamic iron core (10)
There is the second groove (101), the other end of second elastic component (7) is arranged in second groove (101).
9. hydraulic pressure dynamic iron core electromagnet according to claim 1, which is characterized in that the oil cylinder (11) and described second is moved
Iron core (10) is barrel-like structure.
10. a kind of breaker, which is characterized in that the breaker includes tripping mechanism and claim 1 to 9 any one of them
Hydraulic pressure dynamic iron core electromagnet, the hydraulic pressure dynamic iron core electromagnet are used to push the tripping mechanism with disconnecting circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810029241.7A CN108231501B (en) | 2018-01-12 | 2018-01-12 | Hydraulic movable iron core electromagnet and circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810029241.7A CN108231501B (en) | 2018-01-12 | 2018-01-12 | Hydraulic movable iron core electromagnet and circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108231501A true CN108231501A (en) | 2018-06-29 |
| CN108231501B CN108231501B (en) | 2024-02-27 |
Family
ID=62641823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810029241.7A Active CN108231501B (en) | 2018-01-12 | 2018-01-12 | Hydraulic movable iron core electromagnet and circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108231501B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111900798A (en) * | 2020-06-28 | 2020-11-06 | 国网山东省电力公司菏泽供电公司 | Emergency opening and closing delay operation system and method for transformer substation switch cabinet |
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| CN102024630A (en) * | 2009-09-15 | 2011-04-20 | 无锡唯特电气技术有限公司 | Electromagnetic release |
| CN202473795U (en) * | 2012-03-26 | 2012-10-03 | 黄朝武 | Hydraulic electromagnetic circuit breaker trip |
| CN202816834U (en) * | 2012-09-04 | 2013-03-20 | 中国振华集团华联无线电器材厂 | Hydraulic electromagnetic breaker overload time-delay device |
| CN103337423A (en) * | 2013-07-16 | 2013-10-02 | 浙江正泰电器股份有限公司 | Double-action electromagnetic trip |
| CN105513916A (en) * | 2016-01-21 | 2016-04-20 | 首瑞（天津）电气设备有限公司 | Time-delay operation mechanism adopted in circuit breaker and circuit breaker |
| CN208000885U (en) * | 2018-01-12 | 2018-10-23 | 厦门大恒科技有限公司 | A kind of hydraulic pressure dynamic iron core electromagnet and breaker |
-
2018
- 2018-01-12 CN CN201810029241.7A patent/CN108231501B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102024630A (en) * | 2009-09-15 | 2011-04-20 | 无锡唯特电气技术有限公司 | Electromagnetic release |
| CN202473795U (en) * | 2012-03-26 | 2012-10-03 | 黄朝武 | Hydraulic electromagnetic circuit breaker trip |
| CN202816834U (en) * | 2012-09-04 | 2013-03-20 | 中国振华集团华联无线电器材厂 | Hydraulic electromagnetic breaker overload time-delay device |
| CN103337423A (en) * | 2013-07-16 | 2013-10-02 | 浙江正泰电器股份有限公司 | Double-action electromagnetic trip |
| CN105513916A (en) * | 2016-01-21 | 2016-04-20 | 首瑞（天津）电气设备有限公司 | Time-delay operation mechanism adopted in circuit breaker and circuit breaker |
| CN208000885U (en) * | 2018-01-12 | 2018-10-23 | 厦门大恒科技有限公司 | A kind of hydraulic pressure dynamic iron core electromagnet and breaker |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111900798A (en) * | 2020-06-28 | 2020-11-06 | 国网山东省电力公司菏泽供电公司 | Emergency opening and closing delay operation system and method for transformer substation switch cabinet |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108231501B (en) | 2024-02-27 |
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