CN106783412A - Series type energy-saving double winding high-voltage DC contactor - Google Patents
Series type energy-saving double winding high-voltage DC contactor Download PDFInfo
- Publication number
- CN106783412A CN106783412A CN201611244490.5A CN201611244490A CN106783412A CN 106783412 A CN106783412 A CN 106783412A CN 201611244490 A CN201611244490 A CN 201611244490A CN 106783412 A CN106783412 A CN 106783412A
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- Prior art keywords
- terminals
- auxiliary contact
- coil
- contactor
- core bar
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- 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.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/44—Magnetic coils or windings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/44—Magnetic coils or windings
- H01H50/443—Connections to coils
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/54—Contact arrangements
- H01H50/541—Auxiliary contact devices
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention discloses a kind of series type energy-saving double winding high-voltage DC contactor, an auxiliary push-rod is provided with the upper surface of transmission core bar, upper and lower auxiliary contact are respectively equipped with arc-extinguish chamber, the upper and lower auxiliary contact form closed type auxiliary contact；Upper auxiliary contact are fixedly connected with auxiliary push-rod, and auxiliary push-rod can drive lower auxiliary contact when being moved upwards with transmission core bar motion disconnects with upper auxiliary contact upwards；Coil windings include starting winding and keep winding, four terminals are drawn in coil windings, the coil for starting winding is electrically connected to both ends of to second, four terminals, the coil of winding is kept to be electrically connected to both ends of to third and fourth terminals, first and third terminals are connected, third and fourth terminals is connected with upper and lower auxiliary contact respectively again, and first and second terminals form external power source terminals.The present invention relates to two windings of contactor coil and auxiliary contact switching mechanism simple structure, production efficiency is high, low cost.
Description
Technical field
The present invention relates to a kind of D.C. contactor, more particularly to a kind of contact of series type energy-saving double winding HVDC
Device.
Background technology
D.C. contactor needs high current in start-up course coil, overcomes spring anti-to obtain larger electromagnetic attraction
Power；Coil only needs the maintenance electric current of very little can to meet the confining force requirement of electromagnetic system after working stability.According to direct current
The big characteristic for keeping electric current small of starting current of contactor, generally carries out energy-efficient treatment to D.C. contactor coil control section.
The coil Energy Saving Control of high-voltage DC contactor has two ways in the market：One kind is that PWM (adjust by pulse width
System) circuit board control；Another kind is that coil has two windings (start winding and keep winding), by circuit board to starting winding
Conversion and control is carried out with holding winding.Both Energy Saving Control modes are required to circuit board and associated electronic components.Due to circuit
Plate needs to meet the requirement such as EMC, there is the risk of failure in actual use.
The content of the invention
In order to overcome drawbacks described above, the invention provides a kind of series type energy-saving double winding high-voltage DC contactor, lead to
Cross auxiliary contact to change double winding, simple structure, production efficiency is high, low cost.
The technical scheme that is used to solve its technical problem of the present invention is：A kind of series type energy-saving double winding high pressure
D.C. contactor, including upper end open contactor case body and be sealingly fastened in the insulation of the contactor case body upper port
Lid, arc-extinguish chamber is provided with the sealing space of the contactor case body and the insulating lid, be provided with the arc-extinguish chamber main stationary contact,
For forming two moving contacting plates of active contact, being opened with the main stationary contact for driving the moving contacting plate to move up and down
The transmission core bar for closing, the moving contacting plate is vertically connected on the upper end of the transmission core bar, the lower end of the transmission core bar
Portion periphery is provided with iron core and coil windings for driving the transmission core bar to move upwards, and middle part periphery is provided with for being the transmission
Core bar provides the reaction spring of restoring force, and the upper surface of the transmission core bar is provided with an auxiliary push-rod, on the arc-extinguish chamber also
Auxiliary contact and lower auxiliary contact are respectively equipped with, the lower auxiliary contact and upper auxiliary contact form closed type auxiliary contact；Institute
State auxiliary contact to be fixedly connected with the auxiliary push-rod, the auxiliary push-rod can drive when being moved upwards with the transmission core bar
Motion disconnects with the upper auxiliary contact upwards to move the lower auxiliary contact；The coil windings include start winding and keep around
Group, draws four terminals in the coil windings：First terminals, the second terminals, the 3rd terminals and the 4th terminals, institute
The coil for stating startup winding is electrically connected to both ends of to the second terminals and the 4th terminals, the coil two ends of the holding winding
The 3rd terminals and the 4th terminals are respectively electrically connected to, first terminals and the 3rd terminals are connected, the described 3rd
Terminals and the 4th terminals are electrically connected with the upper auxiliary contact and lower auxiliary contact respectively again, first terminals and the
Two terminals form the external power source terminals of coil respectively.
As a further improvement on the present invention, the lower end fixed cover of the transmission core bar is located in the iron core, the iron core
Periphery is the coil windings being fixed in the contactor case body, and the coil windings include starting winding and keep winding, often
One winding is made up of magazine and the coil being wound on the magazine.
As a further improvement on the present invention, the magazine is provided with pole piece, the periphery of the pole piece with it is described
Contactor case body contact, it is described transmission core bar in the middle part of be arranged in the pole piece, the pole piece be placed in described contact
Arc-extinguish chamber in device shell body in upper end forms arc extinguishing space, and the main stationary contact and moving contacting plate are placed in the arc extinguishing space
It is interior.
As a further improvement on the present invention, four metal ferrules are equipped with the insulating lid, wherein two metals are inserted
Pin stretches out the lateral surface of the insulating lid and forms a pair of outer terminals of coil windings respectively, two metal ferrules it is interior
End connects the second terminals and the 3rd terminals respectively；The outer end of another two metal ferrules is respectively connecting to described upper and lower auxiliary
Contact, the inner is helped to be respectively connecting to the 3rd terminals and the 4th terminals.
As a further improvement on the present invention, the upper auxiliary contact and lower auxiliary contact are elastic spring, it is described on
The head of auxiliary contact has a bending for the first downward acute angle, and afterbody is in arc-shaped；The head of the lower auxiliary contact has
One bending of the second upward acute angle, afterbody is in arc-shaped.
As a further improvement on the present invention, first acute angle is 4 °~6 °, and second acute angle is 2 °~4 °.
As a further improvement on the present invention, catch is provided with the middle part of the transmission core bar, the reaction spring is sheathed on
The transmission core bar is located at outside the part between the catch and the iron core, and the transmission core bar is located at the catch and moving contacting plate
Between part outside be arranged with touch spring.
The beneficial effects of the invention are as follows：
Coil Energy Saving Control of the present invention be double winding, between two windings by auxiliary contact winding is worked into
Row conversion.I.e.：Start winding R1 when product starts to work independently, start after the completion of Contactor Starting around R1 and keep winding R2 strings
Connection work.Switching mechanism of the invention is a pair of auxiliary contact K1.Auxiliary contact K1 is link gear, auxiliary with contactor push rod
Contact is located at contacts of contactor top.Because high voltage connector needs sealing, inner space is smaller, and the auxiliary contact of conventional structure turn
Change double winding more difficult.The present invention is by loop construction particular design and ingenious with closed type auxiliary contact at the top of contactor
Connection, reaches two functions of winding switch of contactor.The present invention relates to two windings of contactor coil and auxiliary contact
Switching mechanism simple structure, production efficiency is high, low cost.
Brief description of the drawings
Fig. 1 is schematic structural view of the invention；
Fig. 2 is double-coil contactor circuit diagram of the present invention；
Fig. 3 is coil block of the present invention and metal ferrule connection diagram；
Fig. 4 is metal ferrule of the present invention and auxiliary contact connection diagram；
Fig. 5 is upper auxiliary contact structural representation of the present invention；
Fig. 6 is lower auxiliary contact structural representation of the present invention；
Fig. 7 is the structural representation that auxiliary contact of the present invention are arranged in arc-extinguish chamber；
Fig. 8 is the cross-sectional view of Fig. 7.
With reference to accompanying drawing, make the following instructions：
1 --- the first terminals 2 --- second terminals
3 --- the 3rd terminals 4 --- the 4th terminals
K1 --- closed type auxiliary contact R1 --- starts winding
R2 --- keeping winding 101 --- contactor case body
102 --- coil windings 103 --- moving contacting plates
104 --- main stationary contact 105 --- insulating lids
106 --- upper auxiliary contact 107 --- lower auxiliary contact
108 --- auxiliary push-rod 109 --- arc-extinguish chambers
110 --- touch spring 111 --- reaction springs
112 --- pole pieces 113 --- are driven core bar
114 --- iron core 201 --- metal ferrules
A1, A2 --- main contacts
Q1 --- the first acute angle Q2 --- second acute angle
Specific embodiment
Below in conjunction with accompanying drawing, a preferred embodiment of the invention is elaborated.But protection scope of the present invention is not
Be limited to following embodiments, i.e., the simple equivalence changes made with scope of the present invention patent and description in every case with repair
Decorations, all still belong within patent covering scope of the present invention.
It is a kind of series type energy-saving double winding high-voltage DC contactor of the present invention refering to Fig. 1-8, including upper end
The contactor case body 101 of opening and the insulating lid 105 for being sealingly fastened in the contactor case body upper port, outside the contactor
Arc-extinguish chamber 109 is provided with the sealing space of housing and the insulating lid, main stationary contact 104 is provided with the arc-extinguish chamber, for being formed
Two moving contacting plates of active contact 103, it is opened and closed with the main stationary contact for driving the moving contacting plate to move up and down
Transmission core bar 113, the moving contacting plate is vertically connected on the upper end of the transmission core bar, the bottom of the transmission core bar
Periphery is provided with iron core 114 and coil windings 102 for driving the transmission core bar to move upwards.
Catch is provided with the middle part of the transmission core bar, the transmission core bar is located at outside the part between the catch and the iron core
Be provided with as the transmission core bar provides the reaction spring 111 in replying, the transmission core bar be located at the catch and moving contacting plate it
Between part outside be arranged with touch spring 110.
In the iron core, its outer diameter is to be fixed on outside the contactor to the lower end fixed cover of the transmission core bar
Coil windings in housing, the coil windings include starting winding R1 and keep winding R2, and each winding is by magazine and twines
It is around in the coil composition on the magazine.The magazine is provided with pole piece 112, and the periphery of the pole piece connects with described
Tentaculum shell body contact, it is described transmission core bar in the middle part of be arranged in the pole piece, the pole piece be placed in the contactor
Arc-extinguish chamber in shell body in upper end forms arc extinguishing space, and the main stationary contact and moving contacting plate are placed in the arc extinguishing space.
The upper surface of the transmission core bar is provided with an auxiliary push-rod 108, and auxiliary is further respectively had on the arc-extinguish chamber
Contact 106 and lower auxiliary contact 107, the lower auxiliary contact and upper auxiliary contact form closed type auxiliary contact K1；It is described auxiliary
Contact is helped to be fixedly connected with the auxiliary push-rod, the auxiliary push-rod can drive under this when being moved upwards with the transmission core bar
Motion disconnects auxiliary contact with the upper auxiliary contact upwards；The coil windings include starting winding R1 and keep winding
R2, draws four terminals in the coil windings：First terminals 1, the second terminals 2, the 3rd terminals 3 and the 4th terminals
4, the coil for starting winding is electrically connected to both ends of to the second terminals and the 4th terminals, the coil of the holding winding
It is electrically connected to both ends of to the 3rd terminals and the 4th terminals, first terminals and the 3rd terminals are connected, described
3rd terminals and the 4th terminals are electrically connected with upper and lower auxiliary contact respectively again, first terminals and the second terminals
Two external power source terminals of coil are formed respectively.
Four metal ferrules 201 are equipped with the insulating lid, wherein two metal ferrules stretch out the insulating lid respectively
Lateral surface and form a pair of outer terminals of coil windings, the inner of two metal ferrules connects the second terminals respectively
With the 3rd terminals；The outer end of another two metal ferrules is respectively connecting to the upper and lower auxiliary contact, and the inner is respectively connecting to
3rd terminals and the 4th terminals.
Refering to Fig. 5-6, the upper auxiliary contact and lower auxiliary contact are elastic spring, the head of the upper auxiliary contact
There is a bending of the first downward acute angle Q1, afterbody is in arc-shaped；The head of the lower auxiliary contact has upward
The bending of two acute angle Q2, afterbody is in arc-shaped.First acute angle is 4 °~6 °, and second acute angle is 2 °~4 °.
Refering to Fig. 1, in original state, upper auxiliary contact are closure state with lower auxiliary contact to the D.C. contactor.When
After product work, auxiliary push-rod promotes upper auxiliary contact 106 to move upwards, and so as to leave lower auxiliary contact 107, auxiliary contact break
Open.
Refering to Fig. 2, during coil electricity, electric current is from the first terminals 1 and the 3rd terminals 3 by closed type auxiliary contact K1
To the 4th terminals 4, then by starting the terminals of winding R1 to second 2.It is conducting shape that what now coil was normal closes auxiliary contact K1
State, will keep winding R2 short circuits, and the resistance of coil is R1.After product works, closed type auxiliary contact K1 disconnects.Electric current is from
One terminals 1, the 3rd terminals 3 are by the holding terminals 4 of winding R2 to the 4th, then pass through the startup terminals of winding R1 to second
2.Now coil resistance is R1+R2.Wherein, R1 resistance is smaller, and R2 resistance is larger.I.e.：In product start-up course, start winding R1
Resistance is small, and starting current is big；After product work, resistance (R1+R2) is larger, keeps electric current small.
High voltage connector coil of the present invention has two windings, is respectively to start winding R1 and holding winding R2；Wherein R1 lines
Circle resistance is small, and starting current is big, and major function provides electromagnetic attraction during startup for DC contactor's electromagnetic system；Keep winding
R2 resistance is big, keeps electric current small, and major function is holding Electromagnetic System of Contactor confining force.The mechanism that coil windings are changed is one
To closed type auxiliary contact K1.Closed type auxiliary contact K1 is at the top of arc-extinguish chamber.Original state is that closed type auxiliary contact K1 leads
It is logical.When product coil rated voltage, electric current is aided in from the first terminals of coil 1 by the terminals 3 of coil the 3rd and closed type
Contact K1, the terminals 4 of flowing through coil the 4th, then make line to the formation wire loop of the second terminals of coil 2 by starting winding R1
Circle produces electromagnetic attraction.Now coil only has startup winding R1 to work, and starting current is larger, and electromagnetic attraction is larger；Coil is produced
Electromagnetic attraction overcomes reaction spring counter-force to promote iron core to move upwards.Transmission core bar is moved upwards with iron core, promotes auxiliary push-rod
Motion upwards.Auxiliary push-rod also promotes the upper auxiliary contact of closed type auxiliary contact to move upwards.When iron core and pole piece are closed
Afterwards, auxiliary push-rod promotes upper auxiliary contact to disconnect lower auxiliary contact, i.e.,：Closed type auxiliary contact K1 disconnects；The now guarantor of coil
Hold winding R2 and connected with winding R1 is started, coil resistance is R1+R2, now coil current reduces, play the work of hold-in winding electric current
With.Because coil keeps electric current smaller than starting current, the purpose of energy-conservation is reached.
As can be seen here, coil Energy Saving Control of the present invention is double winding, and auxiliary contact pair are passed through between two windings
Winding work is changed.I.e.：Start winding R1 when product starts to work independently, start after the completion of Contactor Starting around R1 and guarantor
Hold winding R2 tandem workings.Switching mechanism of the invention is a pair of auxiliary contact K1.Auxiliary contact K1 is connection with contactor push rod
Motivation structure, auxiliary contact are located at contacts of contactor top.Because high voltage connector needs sealing, inner space is smaller, conventional structure
Auxiliary contact conversion double winding it is more difficult.The present invention by loop construction particular design and with contactor at the top of closed type
The ingenious connection of auxiliary contact, reaches two functions of winding switch of contactor.The present invention relates to contactor coil two around
Group and auxiliary contact switching mechanism simple structure, production efficiency are high, low cost.
Claims (7)
1. a kind of contactor case body (101) of series type energy-saving double winding high-voltage DC contactor, including upper end open and
Be sealingly fastened in the insulating lid (105) of the contactor case body upper port, the contactor case body and the insulating lid it is close
Envelope is provided with arc-extinguish chamber (109) in space, and main stationary contact (104), moving for two active contacts of formation are provided with the arc-extinguish chamber
Contact chip (103), the transmission core bar (113) for driving the moving contacting plate to move up and down to be opened and closed with the main stationary contact,
The moving contacting plate be vertically connected at it is described transmission core bar upper end on, it is described transmission core bar bottom periphery be provided with for
Iron core (114) and coil windings (102) that the transmission core bar is moved upwards are driven, middle part periphery is provided with for being the transmission core bar
The reaction spring (111) of restoring force is provided, it is characterised in that：The upper surface of the transmission core bar is provided with an auxiliary push-rod
(108) auxiliary contact (106) and lower auxiliary contact (107), are further respectively had on the arc-extinguish chamber, the lower auxiliary contact and upper
Auxiliary contact form closed type auxiliary contact (K1)；The upper auxiliary contact are fixedly connected with the auxiliary push-rod, the auxiliary
Push rod can drive the lower auxiliary contact when being moved upwards with the transmission core bar motion is broken with the upper auxiliary contact upwards
Open；The coil windings include starting winding (R1) and holding winding (R2), and four terminals are drawn in the coil windings：First
Terminals (1), the second terminals (2), the 3rd terminals (3) and the 4th terminals (4), the coil two ends for starting winding point
The second terminals and the 4th terminals are not electrically connected to, and the coil of the holding winding is electrically connected to both ends of to the 3rd terminals
With the 4th terminals, first terminals and the 3rd terminals are connected, and the 3rd terminals and the 4th terminals divide again
Do not electrically connected with the upper auxiliary contact and lower auxiliary contact, first terminals and the second terminals form coil respectively
External power source terminals.
2. series type energy-saving double winding high-voltage DC contactor according to claim 1, it is characterised in that：The transmission
The lower end fixed cover of core bar in the iron core, its outer diameter be the coil that is fixed in the contactor case body around
Group, the coil windings include starting winding (R1) and keep winding (R2), and each winding is by magazine and is wound in the coil
Coil composition on framework.
3. series type energy-saving double winding high-voltage DC contactor according to claim 2, it is characterised in that：The coil
Framework is provided with pole piece (112), and the periphery of the pole piece contacts with the contactor case body, the middle part of the transmission core bar
It is arranged in the pole piece, it is empty that the pole piece forms arc extinguishing with the arc-extinguish chamber being placed in the contactor case body in upper end
Between, the main stationary contact and moving contacting plate are placed in the arc extinguishing space.
4. series type energy-saving double winding high-voltage DC contactor according to claim 1, it is characterised in that：The insulation
Cover and be equipped with four metal ferrules (201), wherein two metal ferrules stretch out the lateral surface of the insulating lid and formed respectively
A pair of outer terminals of coil windings, the inner of two metal ferrules connects the second terminals and the 3rd terminals respectively；
The outer end of another two metal ferrules is respectively connecting to the upper and lower auxiliary contact, and the inner is respectively connecting to the 3rd wiring
End and the 4th terminals.
5. series type energy-saving double winding high-voltage DC contactor according to claim 1, it is characterised in that：It is described auxiliary
Contact and lower auxiliary contact are helped to be elastic spring, the head of the upper auxiliary contact has downward first acute angle (Q1)
Bending, afterbody is in arc-shaped；The head of the lower auxiliary contact has a bending for upward the second acute angle (Q2), and afterbody is in circle
Arcuation.
6. series type energy-saving double winding high-voltage DC contactor according to claim 5, it is characterised in that：Described first
Acute angle is 4 °~6 °, and second acute angle is 2 °~4 °.
7. series type energy-saving double winding high-voltage DC contactor according to claim 1, it is characterised in that：The transmission
Catch is provided with the middle part of core bar, the reaction spring is sheathed on the part that the transmission core bar is located between the catch and the iron core
Outward, the transmission core bar is located at outside the part between the catch and moving contacting plate and is arranged with touch spring (110).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611244490.5A CN106783412A (en) | 2016-12-29 | 2016-12-29 | Series type energy-saving double winding high-voltage DC contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611244490.5A CN106783412A (en) | 2016-12-29 | 2016-12-29 | Series type energy-saving double winding high-voltage DC contactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106783412A true CN106783412A (en) | 2017-05-31 |
Family
ID=58928621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611244490.5A Pending CN106783412A (en) | 2016-12-29 | 2016-12-29 | Series type energy-saving double winding high-voltage DC contactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106783412A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110853984A (en) * | 2019-12-06 | 2020-02-28 | 宁波天波港联电子有限公司 | Multi-section arc relay |
| CN114944303A (en) * | 2022-06-24 | 2022-08-26 | 浙江百事宝电器股份有限公司 | High-voltage direct-current contactor with auxiliary function |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100854381B1 (en) * | 2007-03-05 | 2008-09-02 | 엘에스산전 주식회사 | A sealed dc switching device |
| CN203118876U (en) * | 2013-03-11 | 2013-08-07 | 上海美愉电子有限公司 | Energy-saving type double-coil tripolar direct-current contactor |
| CN203367164U (en) * | 2013-05-30 | 2013-12-25 | 贵州天义电器有限责任公司 | Sealed magnetic blowout high-voltage direct-current contactor |
| CN105679610A (en) * | 2016-04-12 | 2016-06-15 | 昆山国力源通新能源科技有限公司 | High-voltage sealed DC contactor with auxiliary contacts |
| CN106252157A (en) * | 2016-08-31 | 2016-12-21 | 宁波永的电子科技有限公司 | The control circuit of a kind of high-voltage relay, system and method |
| CN206301747U (en) * | 2016-12-29 | 2017-07-04 | 昆山国力源通新能源科技有限公司 | Series type energy-saving double winding high-voltage DC contactor |
-
2016
- 2016-12-29 CN CN201611244490.5A patent/CN106783412A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100854381B1 (en) * | 2007-03-05 | 2008-09-02 | 엘에스산전 주식회사 | A sealed dc switching device |
| CN203118876U (en) * | 2013-03-11 | 2013-08-07 | 上海美愉电子有限公司 | Energy-saving type double-coil tripolar direct-current contactor |
| CN203367164U (en) * | 2013-05-30 | 2013-12-25 | 贵州天义电器有限责任公司 | Sealed magnetic blowout high-voltage direct-current contactor |
| CN105679610A (en) * | 2016-04-12 | 2016-06-15 | 昆山国力源通新能源科技有限公司 | High-voltage sealed DC contactor with auxiliary contacts |
| CN106252157A (en) * | 2016-08-31 | 2016-12-21 | 宁波永的电子科技有限公司 | The control circuit of a kind of high-voltage relay, system and method |
| CN206301747U (en) * | 2016-12-29 | 2017-07-04 | 昆山国力源通新能源科技有限公司 | Series type energy-saving double winding high-voltage DC contactor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110853984A (en) * | 2019-12-06 | 2020-02-28 | 宁波天波港联电子有限公司 | Multi-section arc relay |
| CN114944303A (en) * | 2022-06-24 | 2022-08-26 | 浙江百事宝电器股份有限公司 | High-voltage direct-current contactor with auxiliary function |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170531 |
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| RJ01 | Rejection of invention patent application after publication |