CN108565826A - Low-voltage release resetting device - Google Patents
Low-voltage release resetting device Download PDFInfo
- Publication number
- CN108565826A CN108565826A CN201810432620.0A CN201810432620A CN108565826A CN 108565826 A CN108565826 A CN 108565826A CN 201810432620 A CN201810432620 A CN 201810432620A CN 108565826 A CN108565826 A CN 108565826A
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- China
- Prior art keywords
- triode
- motor
- low pressure
- release lever
- trip device
- 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
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims description 10
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
- 208000003443 Unconsciousness Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
- H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/262—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking orders
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- Electronic Switches (AREA)
Abstract
The invention discloses a low-voltage release resetting device, which comprises: the device comprises a switching power supply circuit, a driving circuit, a motor and an actuating mechanism, wherein the switching power supply circuit is used for converting alternating-current voltage into first direct-current voltage and second direct-current voltage respectively and outputting the first direct-current voltage and the second direct-current voltage; the driving circuit is connected with the output end of the switching power supply circuit and is used for outputting a driving signal for driving the motor to rotate forwards or backwards according to a given direction control signal; the motor is connected with the output end of the driving circuit and used for driving the actuating mechanism to move according to the driving signal so as to close or open the release. According to the invention, a driving circuit outputs a driving signal for controlling the motor to rotate forwards or backwards according to a given direction control signal, and drives the actuating mechanism to move so as to realize remote closing or opening of the release.
Description
Technical field
The present invention relates to technical field of power systems more particularly to a kind of low pressure trip device resetting apparatuses.
Background technology
Buckle releaser is connected with breaker mechanical, to release holding mechanism and the device that makes breaker disconnect automatically.It is existing
Relay protection be when breaking down buckle releaser thread off, circuit breaker trip disconnect faulty grids.After Failure elimination, or electricity
When net maintenance, need operating personnel to scene combined floodgate or cut-off breaker, not only efficiency is low, and existing simultaneously unconscious operation leads to line
The personal safety that short out road is brought is dangerous.Current buckle releaser does not have auto-reset function, it is therefore necessary to which designing one kind can
For the low pressure trip device resetting apparatus of remote control.
Invention content
Technical problem to be solved by the present invention lies in provide a kind of low pressure trip device reset can be used for remote control
Device.
In order to solve the above technical problems, the present invention provides a kind of low pressure trip device resetting apparatus, which is characterized in that including：
Switching power circuit, driving circuit, motor and executing agency, wherein
The switching power circuit is for being respectively converted into the first DC voltage and the second DC voltage by alternating voltage and exporting；
The driving circuit is connected with the output end of the switching power circuit, for according to given direction control signal output
Drive the drive signal of the motor forward or reverse；
The motor is connected with the output end of the driving circuit, for driving the executing agency to transport according to the drive signal
It is dynamic, to be closed or disconnect buckle releaser.
Wherein, the switching power circuit include transformer, the first reverse phase diode, the second diode, the first capacitance and
Second capacitance, the transformer incoming transport electricity, secondary side first end are grounded by the first reverse phase diode, using
Second diode is connected to the first DC-stabilized circuit, and the secondary side second end of the transformer and the second direct current are steady
Piezoelectricity source circuit is connected, and passes through second capacity earth, and first capacitance is connected across second diode output
Between the secondary side second end of the transformer, first DC-stabilized circuit is used to export the first DC voltage,
Second DC-stabilized circuit is for exporting the second DC voltage.
Wherein, the driving circuit includes four phase inverters and H bridge integrated chips, each bridge of the H bridges integrated chip
It is equipped with 1 triode on arm, is respectively located at the first triode and the second triode above and below on the left of H bridges, is located on the right side of H bridges
The power supply positive input of upper and lower third transistor and the 4th triode, the motor accesses first triode and second
The output common end of triode, the power supply negative input terminal of the motor access the defeated of the third transistor and the 4th triode
Go out common end.
Wherein, first direction control signal inputs first triode through the first phase inverter, through the first phase inverter and the
Two phase inverters input second triode, and second direction controls signal and inputs the third transistor, warp through third phase inverter
Third phase inverter and the 4th phase inverter input the 4th triode.
Wherein, first triode and the 4th triode control signal and second direction control letter in the first direction
It is connected when number being low level, output controls the drive signal that the motor rotates forward；Second triode and third transistor
It is connected when the first direction controls signal and second direction control signal is high level, output controls the motor reversal
Drive signal.
Wherein, the executing agency includes：
It is connected and is driven by the motor disk of rotation with the motor；
The T-type connecting rod being fixed on the disk, the T-type connecting rod includes montant and cross bar；
One end fix on the cross bar, the other end be fixed on the release lever in rotating bar；
When buckle releaser needs to be closed, the montant, to the top of the disk, and pushes institute with the rotary motion of the disk
Release lever is stated to move upwards around the rotating bar；Buckle releaser need disconnect when, the montant with the disk rotary motion
To the bottom of the disk, and the release lever is pulled to be moved downward around the rotating bar.
Wherein, there is the disk hexagonal center, axle sleeve to be entrapped in the hexagonal center and be set in the motor
In shaft.
Wherein, the low pressure trip device resetting apparatus further includes the first fixed link and the second fixed link, and described first fixes
The both ends of bar are separately fixed at the left end of the left end and the rotating bar of the cross bar, and the both ends of second fixed link are solid respectively
It is scheduled on the right end of the right end and the rotating bar of the cross bar, first fixed link, the release lever and described second are fixed
Bar is in the same horizontal position.
Wherein, the both ends of first fixed link, second fixed link, the release lever and the rotating bar are equipped with
Aperture, for being inserted into iron bolt with fixation.
Wherein, the montant is located at the left side of the release lever, is described at a distance from the center of the release lever
The half of release lever width.
The advantageous effect that the present invention is brought is：The driving letter of control motor forward or reverse is exported by driving circuit
Number, it drives executing agency's movement to be closed or disconnect buckle releaser, can automatically reset to buckle releaser, and can remotely control
System, without human intervention.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is a kind of structural schematic diagram of low pressure trip device resetting apparatus of the embodiment of the present invention.
Fig. 2 is Switching Power Supply schematic diagram in the embodiment of the present invention.
Fig. 3 is driver circuit schematic diagram in the embodiment of the present invention.
Fig. 4 is driving circuit simple equivalent circuit figure in the embodiment of the present invention.
Specific implementation mode
The explanation of following embodiment is refer to the attached drawing, can be to the specific embodiment implemented to the example present invention.
The direction and position term that the present invention is previously mentioned, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outside", " top
Portion ", " bottom ", " side " etc. are only the direction or position of refer to the attached drawing.Therefore, the direction and position term used be to
Illustrate and understand the present invention rather than limiting the scope of the invention.
The embodiment of the present invention provides a kind of low pressure trip device resetting apparatus, including：Switching power circuit, driving circuit, electricity
Machine and executing agency, wherein
The switching power circuit is used to 220V AC voltage being respectively converted into+12V DC voltage and+5V DC voltages and defeated
Go out；
The driving circuit is connected with the output end of the switching power circuit, for according to given direction control signal output
Drive the drive signal of the motor forward or reverse；
The motor is connected with the output end of the driving circuit, for driving the executing agency to transport according to the drive signal
It is dynamic, to be closed or disconnect buckle releaser.
Specifically, switching power circuit is referring to Fig. 1, including transformer T1, diode D1, diode D2, capacitance C1, capacitance
The electric main of C2, the transformer T1 and Switching Power Supply input terminal access 220V, by transformer T1, secondary side induced electricity
Pressure is E2, and both ends pin is respectively a, b, is grounded by reverse phase diode D1 at the ends a, 7812 circuits are connected to by diode D2
Input terminal 11, C1 is connected across between diode D2 output ends and the ends b, and D2 output ends access 7812 circuit input ends 11, the ends b with
7805 circuits are connected, and by capacitance C2 ground connection, 7812 circuits, the D.C. regulated power supply that 7805 circuits are three ends electricity
Road, 7812 circuit output ends 12 are the DC output voltage of+12V, and 7805 circuit output ends 22 are the DC output voltage of+5V,
The pin 13 of 7812 circuits, the pin 23 of 7805 circuits are directly grounded.
Driving circuit is referring to Fig. 2, including phase inverter IA, phase inverter IB, inverter ic, phase inverter ID, as driving circuit
The H bridge integrated chips of chip（Model SN754410 as shown in the figure）, diode D5, D6, D7, D8, D9, D10, D11, D12.Institute
1 triode is distributed on each bridge arm in the H bridge integrated chip SN754410 stated, as shown in figure 3, distinguishing up and down on the left of H bridges
For triode Q1, triode Q2, H bridge right side are respectively triode Q3, triode Q4, H bridge left side triode Q1, triode up and down
Q2 Enable Pins access No. 1 pin of H bridge integrated chips, H bridges right side triode Q3, and triode Q4 Enable Pins access H bridges and integrate core
No. 9 pins of piece, No. 1 pin of H bridge integrated chips, No. 9 pins are straight by pull-up resistor R1 access switched power outputs+5V
No. 16 pins of galvanic electricity pressure, H bridge integrated chips access Switching Power Supply+5V DC voltage output ends.In the present embodiment, direction controlling
Signal includes first direction control signal Control A and second direction control signal Control B, wherein first direction control
Signal Control A processed access H bridges No. 2 pins of integrated chip by phase inverter IA, are the external input signal of triode Q1, the
One direction control signal Control A access H bridges No. 7 pins of integrated chip by phase inverter IA and IB, are the outer of triode Q2
Portion's input signal, then triode Q1, triode Q2 input opposite external signal, prevent the triode on the left of H bridges direct up and down
Conducting, second direction control signal Control B and access H bridges No. 10 pins of integrated chip by inverter ic, ID, are triode
The external input signal of Q3, second direction control signal Control B draw for No. 15 by phase inverter ID access H bridges integrated chip
Foot is the external input signal of triode Q4, then triode Q3, triode Q4 input opposite external signal, prevents H bridges right
The triode of side is directly connected up and down, and the output signal of triode Q1 is No. 3 pin output signals, the output signal of triode Q2
Output signal for No. 6 pin output signals, triode Q3 is No. 11 pin output signals, and the output signal of triode Q4 is 14
No. 3 pins of number pin output signal, H bridge integrated chips are grounded by reversal connection diode D5, the pin 4,5 of H bridge integrated chips,
12,13 are directly grounded, and No. 8 pins of H bridge integrated chips connect Switching Power Supply+12V DC voltage output end, H bridges integrated chip 3
The reversed diode D6 that is in series between pin and No. 6 pins, diode D7, No. 3 pins and No. 6 pins are respectively as two two poles
The anode of pipe, the reversed diode D8 that is in series between No. 6 pins of H bridges integrated chip and No. 11 pins, diode D9, No. 6 pins
With No. 11 pins respectively as the anode of two diodes, reversed phase string between No. 11 pins of H bridges integrated chip and No. 14 pins
Union II pole pipe D10, diode D11, No. 11 pins and No. 14 pins are respectively as the anode of two diodes, diode D6, D7
Common cathode, the common cathode of diode D10, D11 connects pull-up resistor R2 to Switching Power Supply+12V DC electricity output end, and H bridges are integrated
The power supply positive input of the reversed diode phase D12 of No. 14 pins of chip, diode D12 plus earths, motor access triode
The output common end of Q1 and triode Q2 is the points of common connection of H bridges No. 3 and No. 6 output pins of integrated chip, the power supply of motor
Negative input accesses the output common end of triode Q3 and triode Q4, is No. 11 and No. 14 output pins of H bridges integrated chip
Points of common connection, when first direction control signal Control A be low level, second direction control signal Control B be
When low level, triode Q1, Q4 conducting, motor rotates forward, when first direction control signal ControlA is low level, second direction
When control signal Control B are high level, triode Q1, Q3 conducting, motor does not turn, when first direction controls signal
When Control A are high level, second direction control signal Control B are low level, triode Q2, Q4 conducting, motor is not
Turn, when first direction control signal Control A are high level, second direction control signal Control B are high level, three
Pole pipe Q2, Q3 is connected, motor reversal.
Executing agency referring to Fig. 4, including：
It is connected and is driven by the motor 8 disk 7 of rotation with motor 8；
The T-type connecting rod 1 being fixed on the disk 7, the T-type connecting rod 1 include montant 11 and cross bar 12；
One end is fixed on the cross bar 12, the other end is fixed on the release lever 2 in rotating bar 4；
Buckle releaser need be closed when, the montant 11 with the rotary motion of the disk 7 to the top 71 of the disk 7, and
The release lever 2 is pushed to be moved upwards around the rotating bar 4；When buckle releaser needs to disconnect, the montant 11 is with the disk 7
Rotary motion to the bottom 72 of the disk 7, and the release lever 2 is pulled to be moved downward around the rotating bar 4.
Further, disk 7 has hexagonal center, and for 6 inside of axle sleeve to be empty round, outside is hexagon, is entrapped in hexagonal
In center and it is set in the shaft 80 of motor 8.
The present embodiment low pressure trip device resetting apparatus further includes the first fixed link 31 and the second fixed link 32, the first fixed link
31 both ends are separately fixed at the left end of the left end and rotating bar 4 of cross bar 12, and the both ends of the second fixed link 32 are separately fixed at cross
The right end of the right end and rotating bar 4 of bar 12, the first fixed link 31, release lever 2 and the second fixed link 32 are in the same horizontal position.
2 both ends of release lever have perforation, two fixed link both ends to have perforation, length and 2 length of release lever of two fixed links
Identical, punch position and release lever 2 are consistent, and there are two apertures of slotting small iron bolt 50 on 4 left side of rotating bar, centre, the right, intermediate
The spacing of two apertures is the width of release lever 2, and the spacing of two apertures in the left side is the width of the first fixed link 31, two, the right
The width of aperture is the width of the second fixed link 32, among the spacing and rotating bar 4 of two, left side aperture and two, the right aperture
Apart from equal, rotating bar 4 is passed through to the perforation of release lever 2, the first fixed link 31, the second fixed link 32, on the left side, centre, the right side
It is inserted into iron bolt 50 in the rotating bar aperture on side, one end of the first fixed link 31, release lever 2, the second fixed link 32 is fixed on together
One horizontal position, and the position of rotating bar 4 is fixed, the first fixed link 31, release lever 2, the second fixed link 32, which can surround, to be turned
Lever 4 rotates.The montant 11 of T-type connecting rod 1 is located at the left side of release lever 2, is dropout at a distance from the center of release lever 2
The half of 2 width of bar.12 length of cross bar is consistent with 4 length of rotating bar, the left side of cross bar 12 there are two aperture, aperture position with turn
Two, 4 left side of lever aperture position is consistent, and there are two aperture, aperture position and 4 the right of rotating bar are two small on the right of cross bar 12
Hole site is consistent, and there are one aperture, aperture is located at apart from the position of 11 the right interval 2 width of release lever of montant, by T-type Intermediate Gray
The cross bar 12 of connecting rod 1 pass through the first fixed link 31, release lever 2, the first fixed link 32 the other end perforation, the left side, centre,
It is inserted into iron bolt 50 in the aperture on the right, the cross bar 12 of rotating bar 4,2, two fixed links of release lever, T-type connecting rod 1 is fixed on
Same plane pushes the cross bar 12 of T-type connecting rod 1 that release lever 2 can be driven to move up and down.The 11 tail end band of montant of T-type connecting rod 1
There is flat aperture, montant 11 is fixed on disk 7 with screw 13.When buckle releaser needs to be closed, motor rotates forward, and is fixed on disk
The montant 11 of T-type connecting rod 1 on 7 moves to the top 71 of disk 7 from the bottom of disk 7 72；When buckle releaser needs to disconnect, electricity
Machine inverts, and the montant 11 for the T-type connecting rod 1 being fixed on disk 7 moves to the bottom 72 of disk 7 from the top of disk 7 71；It is de-
When detaining device holding original state, motor does not turn.
Compared with prior art, the beneficial effects of the present invention are exported by driving circuit and control motor rotating forward or anti-
The drive signal turned drives executing agency's movement to be closed or disconnect buckle releaser, can automatically reset to buckle releaser, and
It can be with remote control, without human intervention.
The above disclosure is only the preferred embodiments of the present invention, cannot limit the right model of the present invention with this certainly
It encloses, therefore equivalent changes made in accordance with the claims of the present invention, is still within the scope of the present invention.
Claims (10)
1. a kind of low pressure trip device resetting apparatus, which is characterized in that including：Switching power circuit, driving circuit, motor and execution
Mechanism, wherein
The switching power circuit is for being respectively converted into the first DC voltage and the second DC voltage by alternating voltage and exporting；
The driving circuit is connected with the output end of the switching power circuit, the direction control signal given for basis, defeated
Go out the drive signal for driving the motor forward or reverse；
The motor is connected with the output end of the driving circuit, for driving the executing agency to transport according to the drive signal
It is dynamic, to be closed or disconnect buckle releaser.
2. low pressure trip device resetting apparatus according to claim 1, which is characterized in that the switching power circuit includes becoming
Depressor, the first reverse phase diode, the second diode, the first capacitance and the second capacitance, the transformer incoming transport electricity are secondary
Side first end is grounded by the first reverse phase diode, and the first D.C. regulated power supply is connected to using second diode
The secondary side second end of circuit, the transformer is connected with the second DC-stabilized circuit, and is connect by second capacitance
Ground, first capacitance is connected across between second diode output and the secondary side second end of the transformer, described
First DC-stabilized circuit is for exporting the first DC voltage, and second DC-stabilized circuit is for exporting second
DC voltage.
3. low pressure trip device resetting apparatus according to claim 1, which is characterized in that the driving circuit includes four anti-
Phase device and H bridge integrated chips are equipped with 1 triode on each bridge arm of the H bridges integrated chip, and it is left to be respectively located at H bridges
The first triode and the second triode above and below side, the third transistor above and below H bridges right side and the 4th triode, the electricity
The power supply positive input of machine accesses the output common end of first triode and the second triode, and the power supply of the motor is negative
Pole input terminal accesses the output common end of the third transistor and the 4th triode.
4. low pressure trip device resetting apparatus according to claim 3, which is characterized in that first direction controls signal through first
Phase inverter inputs first triode, and second triode, second direction are inputted through the first phase inverter and the second phase inverter
It controls signal and inputs the third transistor through third phase inverter, through third phase inverter and the 4th phase inverter input the described 4th 3
Pole pipe.
5. low pressure trip device resetting apparatus according to claim 4, which is characterized in that first triode and the four or three
Pole pipe is connected when the first direction controls signal and second direction control signal is low level, and output controls the motor
The drive signal of rotating forward；Second triode and third transistor control signal and second direction control in the first direction
It is connected when signal is high level, output controls the drive signal of the motor reversal.
6. low pressure trip device resetting apparatus according to claim 1, which is characterized in that the executing agency includes：
It is connected and is driven by the motor disk of rotation with the motor；
The T-type connecting rod being fixed on the disk, the T-type connecting rod includes montant and cross bar；
One end fix on the cross bar, the other end be fixed on the release lever in rotating bar；
When buckle releaser needs to be closed, the montant, to the top of the disk, and pushes institute with the rotary motion of the disk
Release lever is stated to move upwards around the rotating bar；Buckle releaser need disconnect when, the montant with the disk rotary motion
To the bottom of the disk, and the release lever is pulled to be moved downward around the rotating bar.
7. low pressure trip device resetting apparatus according to claim 6, which is characterized in that the disk has hexagonal center,
Axle sleeve is entrapped in the hexagonal center and is set in the shaft of the motor.
8. low pressure trip device resetting apparatus according to claim 6, which is characterized in that further include the first fixed link and second
Fixed link, the both ends of first fixed link are separately fixed at the left end of the left end and the rotating bar of the cross bar, and described
The both ends of two fixed links are separately fixed at the right end of the right end and the rotating bar of the cross bar, first fixed link, described
Release lever and second fixed link are in the same horizontal position.
9. low pressure trip device resetting apparatus according to claim 8, which is characterized in that first fixed link, described
The both ends of two fixed links, the release lever and the rotating bar are equipped with aperture, for being inserted into iron bolt with fixation.
10. low pressure trip device resetting apparatus according to claim 6, which is characterized in that the montant is located at the dropout
It is the half of the release lever width at a distance from the left side of bar, with the center of the release lever.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810432620.0A CN108565826A (en) | 2018-05-08 | 2018-05-08 | Low-voltage release resetting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810432620.0A CN108565826A (en) | 2018-05-08 | 2018-05-08 | Low-voltage release resetting device |
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| Publication Number | Publication Date |
|---|---|
| CN108565826A true CN108565826A (en) | 2018-09-21 |
Family
ID=63538343
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810432620.0A Pending CN108565826A (en) | 2018-05-08 | 2018-05-08 | Low-voltage release resetting device |
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| CN207264986U (en) * | 2017-10-19 | 2018-04-20 | 浙江凯发电气有限公司 | A kind of automatic switching off/on device of miniature circuit breaker |
| CN208078621U (en) * | 2018-05-08 | 2018-11-09 | 深圳供电局有限公司 | Low-voltage release resetting device |
-
2018
- 2018-05-08 CN CN201810432620.0A patent/CN108565826A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05307929A (en) * | 1992-03-04 | 1993-11-19 | Mitsubishi Electric Corp | Motor-operated device for circuit breaker |
| JPH10217763A (en) * | 1997-02-04 | 1998-08-18 | Nissan Motor Co Ltd | Motor control device for switching mechanism |
| CN101707165A (en) * | 2009-09-29 | 2010-05-12 | 湖北盛佳电器设备有限公司 | Built-in A type intelligent circuit breaker with automatic closing function |
| CN102800538A (en) * | 2012-08-07 | 2012-11-28 | 浙江麦克力电气有限公司 | Automatic switching-on device of circuit breaker |
| CN103647250A (en) * | 2013-12-05 | 2014-03-19 | 江苏国星电器有限公司 | Electromagnetic under-voltage release and controlling method thereof |
| CN107127422A (en) * | 2017-07-07 | 2017-09-05 | 兰州理工大学技术工程学院 | A kind of arc welder power source of High Power Factor technology |
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| CN208078621U (en) * | 2018-05-08 | 2018-11-09 | 深圳供电局有限公司 | Low-voltage release resetting device |
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