CN108400040A - A kind of standby usage power transfer device with delay protection - Google Patents
A kind of standby usage power transfer device with delay protection Download PDFInfo
- Publication number
- CN108400040A CN108400040A CN201810430739.4A CN201810430739A CN108400040A CN 108400040 A CN108400040 A CN 108400040A CN 201810430739 A CN201810430739 A CN 201810430739A CN 108400040 A CN108400040 A CN 108400040A
- Authority
- CN
- China
- Prior art keywords
- moving contact
- delay protection
- power source
- main power
- armature
- 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
- 230000007246 mechanism Effects 0.000 claims abstract description 48
- 230000005611 electricity Effects 0.000 claims abstract description 21
- 230000003068 static effect Effects 0.000 claims description 39
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 8
- 238000013016 damping Methods 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 230000000153 supplemental effect Effects 0.000 claims description 3
- 230000004888 barrier function Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000013024 troubleshooting Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
- H01H9/26—Interlocking, locking, or latching mechanisms for interlocking two or more switches
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H7/00—Devices for introducing a predetermined time delay between the initiation of the switching operation and the opening or closing of the contacts
- H01H7/08—Devices for introducing a predetermined time delay between the initiation of the switching operation and the opening or closing of the contacts with timing by mechanical speed-control devices
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Breakers (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The present invention discloses a kind of standby usage power transfer device with delay protection, including contactor, overload protecting mechanism, delay protection mechanism.Contactor coil connects main power source, and when main power source is powered, contactor armature is attracted, and is driven movable contact and main power source contacting, is powered by main power source.When main power source powers off, contactor coil dead electricity, contactor armature disconnects under spring force, drives movable contact and stand-by power supply contacting, is powered by stand-by power supply.It, may be due to spread of voltage in the incipient stage just to have restored electricity when main power source restores again; there is larger voltage fluctuation, it will damage equipment, especially some valuable precision equipments; it is acted at this time by delay protection mechanism, delay powers on, and equipment is protected not to be damaged.When there is short circuit, overcurrent, overload, main or stand-by power supply is disconnected by overload protecting mechanism, to protect equipment and ensure that accident does not occur.
Description
Technical field
The present invention relates to electric equipment products field more particularly to a kind of standby usage power supply switchings with overload and delay protection
Device.
Background technology
Do not allow to have a power failure in certain industries, place and department, is typically equipped with standby usage two-way power supply, it is necessary to assure whole day
It does not power off within 24 hours.When mains power failure, it is necessary to stand-by power supply is immediately switched to, to ensure uninterrupted power supply.Active and standby electricity consumption
Source switching is realized by power transfer device.Current power transfer device mainly has electronic type and mechanical but all not short
Road, overload protection.When main power source recovery, when power supply again switches to main power source, because main power source has just restored electricity voltage also
It is unstable, it will to cause equipment damage.
Invention content
In view of the deficiencies in the prior art, it is an object of the invention to develop a kind of electricity with delay protection of design
Source switching device realizes that standby usage power supply automatically switches, and solves spread of voltage situation occur when just starting to restore electricity, to protect
Protect equipment.
To achieve the above objectives, the present invention adopts the following technical scheme that.
A kind of standby usage power transfer device with delay protection, which is characterized in that including：Contactor and delay protection
Mechanism, the contactor include the first armature, electromagnet, the first spring, the first static contact, the second static contact and moving contact, institute
It states the first static contact to connect with main power source, second static contact is connect with stand-by power supply, the moving contact and user's power end
Connection, the moving contact is connect with first armature, and moving back and forth and first static contact with first armature
Or the second static contact contact, the electromagnet connect with main power source, and the electromagnet and first spring are first rank
Iron provides the active force moved back and forth；The delay protection mechanism is connect with the moving contact, is the moving contact and described the
The contact of one static contact provides a damping time.
As a further illustration of the above scheme, one end rotational installation of the moving contact, the other end of the moving contact
It is contacted with first static contact or the second static contact by swinging.
It is pushed away as a further illustration of the above scheme, being equipped with first connect with first armature on the moving contact
Bar, first armature drive first push rod to move back and forth when moving back and forth, and then drive the other end of the moving contact
It swings.
As a further illustration of the above scheme, the delay protection mechanism of stating is gasbag-type damper, including：Piston,
Piston rod and second spring, the second spring socket on the piston rod, a supplemental drag are provided for the compression of piston rod.
As a further illustration of the above scheme, the piston rod is connect with first push rod.
As a further illustration of the above scheme, the electromagnet is made of first coil and iron core.
As a further illustration of the above scheme, being connected with overload protecting mechanism on the moving contact, the overload is protected
Shield mechanism is made of main power source overload protecting mechanism and stand-by power supply overload protecting mechanism；When short circuit, overcurrent, overload occurs in equipment
When, the overload protecting mechanism disconnects main power source or stand-by power supply.
As a further illustration of the above scheme, the main power source overload protecting mechanism includes：Second coil, the second rank
Iron, mandril and third spring, the second coil series connection enter in main power source, the mandril and second armature and described the
Three springs connect, and move back and forth under the drive of second armature and the third spring；The mandril is touched with described move
Head connection.
As a further illustration of the above scheme, the second push rod corresponding with the mandril is equipped on the moving contact,
The second push rod is pushed to move when the mandril moves back and forth.
As a further illustration of the above scheme, the corresponding main power source overload protecting mechanism is equipped with locking switch；It has served as
When carrying generation, it is hanging that overload protecting mechanism pushes the moving contact and the first static contact to disengage, and at this moment, the locking switch is dynamic
Make, the moving contact is locked in hanging position；After overloading troubleshooting, the locking switch is pressed, the moving contact just may be used
To be moved under the action of the third spring, restore electricity.
The beneficial effects of the invention are as follows：
One, contactor coil connects main power source, and when main power source is powered, contactor armature is attracted, and drives movable contact and main electricity
Source contacting, is powered by main power source.When main power source powers off, contactor coil dead electricity, work of the contactor armature in spring force
With lower disconnection, movable contact and stand-by power supply contacting are driven, is powered by stand-by power supply.When main power source restores again, rigid
The incipient stage to restore electricity larger voltage fluctuation may occur due to spread of voltage, it will damage equipment, especially
Some valuable precision equipments, are acted on by delay protection mechanism at this time, and delay powers on, and equipment is protected not to be damaged.
Two, using overload protecting mechanism drive contactor moving contact, when in equipment running process occur short circuit, overcurrent,
Situations such as overload, disconnects main power source or stand-by power supply, to protect equipment and ensure that accident does not occur by overload protecting mechanism.
Three, by the way that locking switch is arranged on overload protecting mechanism, in overload protection, the position of moving contact is locked
It is fixed, when overload fault excludes, the position of moving contact is unlocked, safety is good.
Description of the drawings
Fig. 1 show standby usage power transfer device structural schematic diagram provided by the invention.
Reference sign：
1：Contactor, 2：Delay protection mechanism, 3：First push rod, 4：Overload protecting mechanism, 5：Second push rod.
1-1：First armature, 1-2：Iron core, 1-3：First coil, 1-4：First spring, 1-5：First static contact, 1-6：The
Two static contacts, 1-7：Moving contact.
2-1：Piston, 2-2：Piston rod, 2-3：Second spring.
4-1：Second coil, 4-2：Second armature, 4-3：Mandril, 4-4：Third spring, 4-5：Locking switch.
Specific implementation mode
In the description of the present invention, it should be noted that " transverse direction ", " vertical if any term "center" for the noun of locality
To ", " length ", " width ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top",
The indicating positions such as "bottom", "inner", "outside", " clockwise ", " counterclockwise " and position relationship are orientation based on ... shown in the drawings or position
Relationship is set, the narration present invention is merely for convenience of and simplifies description, device is not indicated or implied the indicated or element is necessary
It constructs and operates with specific orientation, with particular orientation, should not be understood as the specific protection domain of the limitation present invention.
In addition, being used for description purposes only if any term " first ", " second ", it is not understood to indicate or imply relatively heavy
The property wanted or the quantity for implicitly indicating technical characteristic." first " is defined as a result, " second " feature can be expressed or implicit include
One or more this feature, in the present description, " at least " are meant that one or more, unless otherwise clearly having
The restriction of body.
In the present invention, except as otherwise clear stipulaties and restriction, should make if any term " assembling ", " connected ", " connection " term
Broad sense goes to understand, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；Can also be that machinery connects
It connects；It can be directly connected, can also be to be connected by intermediary, can be connected inside two elements.For ability
For the those of ordinary skill of domain, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In invention, unless otherwise specified and limited, fisrt feature the "upper" of second feature or "lower" may include
First and second features are in direct contact, can also include fisrt feature and second feature not be in direct contact but by them it
Between other characterisation contact.Moreover, fisrt feature second feature " on ", " under " and " above " include fisrt feature
Right over two features and oblique upper, or be only to indicate that fisrt feature level height is higher than the height of second feature.Fisrt feature
Second feature " on ", " under " and " below " include that fisrt feature is directly under or diagonally below the second feature, or only table
Show that fisrt feature level height is less than second feature.
With reference to the attached drawing of specification, the specific implementation mode of the present invention is further described, makes the present invention's
Technical solution and advantage are clearer, clear.Embodiment is described below with reference to attached drawing to be exemplary, it is intended to solve
The present invention is released, and is not considered as limiting the invention.
As shown in Figure 1, a kind of power transfer device with delay protection, including contactor 1 and delay protection mechanism 2,
The contactor 1 includes the first armature 1-1, iron core 1-2, first coil 1-3, the first spring 1-4, the first static contact 1-5, second
Static contact 1-6 and moving contact 1-7, the first static contact 1-5 are connect with main power source, the second static contact 1-6 and standby electricity
Source connects, and the moving contact 1-7 is connect with user's power end, and the moving contact 1-7 is connect with the first armature 1-1, and with
Moving back and forth for the first armature 1-1 is contacted with the first static contact 1-5 or the second static contact 1-6, the iron core 1-2 and
The first coil 1-3 constitutes electromagnet, and the first coil 1-3 is connect with main power source, the electromagnet and first bullet
Spring 1-4 provides the active force moved back and forth for the first armature 1-1；The delay protection mechanism 2 and moving contact 1-7 connects
It connects, a damping time is provided with the contact of the first static contact 1-5 for the moving contact 1-7.
Operation principle is：When main power source is powered, the first coil 1-3 is powered, and the first armature 1-1 is by electromagnet
Actuation moves down, and then moving contact 1-7 is driven to move down；Under the action of delay protection mechanism 2, moving contact 1-7 be slowly displaced downwardly to
First static contact 1-5 contacts；At this moment, main power source is by the first static contact 1-5 and moving contact 1-7 accessing user's power supplys, by main electricity
Source powers.When main power source powers off, first coil 1-3 power-off, the first armature 1-1 is moved up under the action of the first spring 1-4, into
And moving contact 1-7 is driven to move up, moving contact 1-7 is contacted with the second static contact 1-6；At this moment, stand-by power supply passes through the second static contact
1-6 and moving contact 1-7 accessing user's power supplys, are powered by stand-by power supply；When main power source restores, master is again switched to by contactor
Power supply power supply；The effect of delay protection mechanism 2 is after main power source powers off, when restoring electricity again, due to just starting to restore to supply
When electric, power supply may can be caused unstable due to various factors, voltage fluctuates, and will damage equipment in this way, more especially
Expensive equipment, therefore design a delay protection mechanism 2 and provided centainly by delay protection mechanism 2 when main power source restores electricity
Resistance makes moving contact 1-7 delays after a certain period of time, then connects the first static contact 1-5, energy main power source is connect, to eliminate main electricity
Voltage fluctuation stage when source just restores electricity plays the role of protecting user equipment.
In the present embodiment, one end of the preferably described moving contact 1-7 is rotatablely installed, and the other end of the moving contact 1-7 is in institute
It states and is contacted with the first static contact 1-5 or the second static contact 1-6 under the action of electromagnet, the first spring 1-4.
It is preferred that the delay protection mechanism 2 is gasbag-type damper, including：Piston 2-1, piston rod 2-2 and second spring
2-3, the second spring 2-3 are socketed on piston rod 2-2, and a supplemental drag is provided for the compression of piston rod 2-2.This implementation
Example provides damping using gasbag-type damper, simple in structure, and damping delay effect is good.
It is preferred that being equipped with the first push rod 3 on the moving contact 1-7, the first armature 1-1 and the piston rod 2-2 are
It is corresponding with the first push rod 3, when the first armature 1-1 and piston rod 2-2 is moved, first push rod 3 is pushed to move,
And then the other end of the moving contact 1-7 is driven to swing.
Further, overload protecting mechanism 4 is also associated on the moving contact 1-7, the overload protecting mechanism 4 is by leading
Over current protection mechanism and stand-by power supply overload protecting mechanism composition.
The main power source overload protecting mechanism includes：Second coil 4-1, the second armature 4-2, mandril 4-3 and third spring
4-4, the second coil 4-1 series connections enter in main power source, the mandril 4-3 and second armature and the third spring 4-
4 connections, and move back and forth under the drive of second armature and the third spring 4-4.It is equipped on the moving contact 1-7
The second push rod corresponding with the mandril 4-3 5.When main power source by when, such as user equipment occur short circuit, overcurrent, overload feelings
Condition, the second coil 4-1 generate electromagnetic force and are attracted the second armature 4-2, to drive mandril 4-3 to move up, moving contact 1-7 is pushed
It (neither contacts with the first static contact nor is contacted with the second static contact) to overhead positions A, main power source is cut off, to protect
User equipment.
Further, the corresponding main power source overload protecting mechanism is equipped with locking switch 4-5.When the overload occurs, mistake
Carrying protection mechanism 4 pushes moving contact 1-7 to be disengaged vacantly with corresponding static contact, at this moment, locking switch 4-5 actions, by moving contact
1-7 is locked in hanging position, and safety is good.After overloading troubleshooting, locking switch 4-5 is pressed, moving contact 1-7 just can be
It moves under the action of three spring 4-4, can just restore electricity.
The structural principle of stand-by power supply overload protecting mechanism is similar with main power source overload protecting mechanism, only corresponding coil
Access stand-by power supply is merely able to, and which is not described herein again.
A kind of standby usage power transfer device with delay protection provided in this embodiment is realized active and standby using contactor
Electricity consumption source is automatically switched, and delay protection mechanism is combined to solve spread of voltage situation occur when just starting to restore electricity.When setting
It is standby situations such as short circuit, overcurrent, overload occur, it cuts off the power immediately, to protect equipment.
From the foregoing description of structures and principles it should be understood by those skilled in the art that, the present invention not office
It is limited to above-mentioned specific implementation mode, uses the improvement of techniques well known and replacement to all fall within this hair on the basis of the present invention
Bright protection domain, protection scope of the present invention should limit it by each claim and its equivalent.In specific implementation mode
The part not illustrated is the prior art or common knowledge.
Claims (10)
1. a kind of standby usage power transfer device with delay protection, which is characterized in that including：Contactor and delay protection machine
Structure, the contactor includes the first armature, electromagnet, the first spring, the first static contact, the second static contact and moving contact, described
First static contact is connect with main power source, and second static contact is connect with stand-by power supply, and the moving contact connects with user's power end
Connect, the moving contact is connect with first armature, and with first armature move back and forth with first static contact or
Second static contact contacts, and the electromagnet is connect with main power source, and the electromagnet and first spring are first armature
The active force moved back and forth is provided；The delay protection mechanism is connect with the moving contact, is the moving contact and described first
The contact of static contact provides a damping time.
2. a kind of standby usage power transfer device with delay protection according to claim 1, which is characterized in that described
One end of moving contact is rotatablely installed, and the other end of the moving contact is connect by swinging with first static contact or the second static contact
It touches.
3. a kind of standby usage power transfer device with delay protection according to claim 2, which is characterized in that in institute
It states moving contact and is equipped with the first push rod being connect with first armature, first armature drives described first when moving back and forth
Push rod moves back and forth, and then the other end of the moving contact is driven to swing.
4. a kind of standby usage power transfer device with delay protection according to claim 3, which is characterized in that described
It is gasbag-type damper to state delay protection mechanism, including：Piston, piston rod and second spring, the second spring are socketed in work
On stopper rod, a supplemental drag is provided for the compression of piston rod.
5. a kind of standby usage power transfer device with delay protection according to claim 4, which is characterized in that described
Piston rod is connect with first push rod.
6. a kind of standby usage power transfer device with delay protection according to claim 1, which is characterized in that described
Electromagnet is made of first coil and iron core.
7. a kind of standby usage power transfer device with delay protection according to claim 1, which is characterized in that in institute
It states and is connected with overload protecting mechanism on moving contact, the overload protecting mechanism is by main power source overload protecting mechanism and stand-by power supply mistake
Carry protection mechanism composition；When short circuit, overcurrent, overload occurs in equipment, the overload protecting mechanism disconnects main power source or standby electricity
Source.
8. a kind of standby usage power transfer device with delay protection according to claim 7, which is characterized in that described
Main power source overload protecting mechanism includes：Second coil, the second armature, mandril and third spring, the second coil series connection access
In main power source, the mandril is connect with second armature and the third spring, and in second armature and the third
Move back and forth under the drive of spring；The mandril is connect with the moving contact.
9. a kind of standby usage power transfer device with delay protection according to claim 8, which is characterized in that in institute
It states moving contact and is equipped with the second push rod corresponding with the mandril, the second push rod is pushed to move when the mandril moves back and forth.
10. a kind of standby usage power transfer device with delay protection according to claim 8, which is characterized in that right
The main power source overload protecting mechanism is answered to be equipped with locking switch；When the overload occurs, overload protecting mechanism pushes the moving contact
It is disengaged vacantly with the first static contact, at this moment, the moving contact is locked in hanging position by the locking switch action；When overload event
After barrier excludes, the locking switch is pressed, the moving contact can just move under the action of the third spring, restore to supply
Electricity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810430739.4A CN108400040B (en) | 2018-05-08 | 2018-05-08 | Main and standby power supply switching device with time delay protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810430739.4A CN108400040B (en) | 2018-05-08 | 2018-05-08 | Main and standby power supply switching device with time delay protection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108400040A true CN108400040A (en) | 2018-08-14 |
| CN108400040B CN108400040B (en) | 2024-05-14 |
Family
ID=63101668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810430739.4A Active CN108400040B (en) | 2018-05-08 | 2018-05-08 | Main and standby power supply switching device with time delay protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108400040B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110994774A (en) * | 2019-11-11 | 2020-04-10 | 广州亚美智造科技有限公司 | Power supply switching circuit |
| CN112631219A (en) * | 2020-12-16 | 2021-04-09 | 国网江苏省电力有限公司徐州供电分公司 | Remote intelligent circuit breaker control system |
| CN112952989A (en) * | 2021-03-10 | 2021-06-11 | 武汉旭正科技有限公司 | Power supply control system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19521497A1 (en) * | 1994-06-15 | 1995-12-21 | Hitachi Ltd | Overcurrent protection circuit |
| KR20010068607A (en) * | 2000-01-07 | 2001-07-23 | 이종수 | One driving two switches operating mechanism conversion device for automatic load transfer switch |
| WO2006069957A1 (en) * | 2004-12-23 | 2006-07-06 | Siemens Aktiengesellschaft | Method and device for the secure operation of a switching device |
| CN204067112U (en) * | 2014-09-16 | 2014-12-31 | 浙江欧迪森电气有限公司 | Twin-power switch |
| CN208045357U (en) * | 2018-05-08 | 2018-11-02 | 佛山职业技术学院 | A kind of standby usage power transfer device with delay protection |
-
2018
- 2018-05-08 CN CN201810430739.4A patent/CN108400040B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19521497A1 (en) * | 1994-06-15 | 1995-12-21 | Hitachi Ltd | Overcurrent protection circuit |
| KR20010068607A (en) * | 2000-01-07 | 2001-07-23 | 이종수 | One driving two switches operating mechanism conversion device for automatic load transfer switch |
| WO2006069957A1 (en) * | 2004-12-23 | 2006-07-06 | Siemens Aktiengesellschaft | Method and device for the secure operation of a switching device |
| CN204067112U (en) * | 2014-09-16 | 2014-12-31 | 浙江欧迪森电气有限公司 | Twin-power switch |
| CN208045357U (en) * | 2018-05-08 | 2018-11-02 | 佛山职业技术学院 | A kind of standby usage power transfer device with delay protection |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110994774A (en) * | 2019-11-11 | 2020-04-10 | 广州亚美智造科技有限公司 | Power supply switching circuit |
| CN112631219A (en) * | 2020-12-16 | 2021-04-09 | 国网江苏省电力有限公司徐州供电分公司 | Remote intelligent circuit breaker control system |
| CN112952989A (en) * | 2021-03-10 | 2021-06-11 | 武汉旭正科技有限公司 | Power supply control system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108400040B (en) | 2024-05-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108400040A (en) | A kind of standby usage power transfer device with delay protection | |
| CN203481122U (en) | Rapid vacuum switch and power grid system | |
| CN208045357U (en) | A kind of standby usage power transfer device with delay protection | |
| CN103888031A (en) | Brake control circuit and motor system | |
| CN209000831U (en) | A kind of resistance to shorting rush of current and contact-carrying are adhered the relay of monitoring function | |
| CN201514903U (en) | Limiting type double-breakpoint electromagnetic relay | |
| CN209571876U (en) | A kind of line feed terminals power-supply management system | |
| CN111816525A (en) | Intelligent self-recovery fuse | |
| CN204289138U (en) | Electromagnetic type power-off restoration switch | |
| CN102768919B (en) | Soft-start circuit | |
| CN203192723U (en) | Under-voltage trip gear for breaker | |
| CN202585232U (en) | Permanent magnet alternating current vacuum contactor | |
| CN107809103B (en) | Lightning protection type residual current operated circuit breaker | |
| CN205428837U (en) | High -voltage direct -current relay | |
| CN112201495A (en) | Fast three-phase double-power supply change-over switch | |
| CN203553052U (en) | Closing contactor | |
| CN210327135U (en) | Main/standby power supply type uninterrupted power supply system based on SiC bidirectional switch | |
| CN207690726U (en) | A kind of contactor | |
| CN202189704U (en) | Novel controller | |
| CN214043456U (en) | Fast three-phase double-power supply change-over switch | |
| CN201332065Y (en) | AC/DC electromagnetic contactor for electric locomotive | |
| CN110838711A (en) | Anti-interference circuit | |
| CN205489451U (en) | No -voltage release with internal switch | |
| CN202737560U (en) | Voltage-loss protection circuit of dual-power wire incoming high-voltage switch cabinet | |
| CN219696336U (en) | Electromagnetic anti-interference electric contactor |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |