CN106328457A - Overload protection device for circuit breaker and control method thereof - Google Patents
Overload protection device for circuit breaker and control method thereof Download PDFInfo
- Publication number
- CN106328457A CN106328457A CN201610753534.0A CN201610753534A CN106328457A CN 106328457 A CN106328457 A CN 106328457A CN 201610753534 A CN201610753534 A CN 201610753534A CN 106328457 A CN106328457 A CN 106328457A
- Authority
- CN
- China
- Prior art keywords
- overload protection
- chopper
- connecting lever
- resistance element
- voltage
- 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.)
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/42—Induction-motor, induced-current, or electrodynamic release mechanisms
- H01H71/43—Electrodynamic release mechanisms
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/66—Power reset mechanisms
- H01H71/70—Power reset mechanisms actuated by electric motor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
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- Emergency Protection Circuit Devices (AREA)
Abstract
The invention relates to an overload protection device for a circuit breaker and a control method thereof. A constant value resistance element is connected between an inlet terminal and an outlet terminal, two connection ends of the constant value resistance element are connected with a voltage acquisition module of a control circuit board, and the voltage acquisition module can acquire a voltage value between the two connection ends of the constant value resistance element; when the current flowing through the constant value resistance element exceeds a rated load, the voltage acquisition module can detect that the voltage value between the two ends of the constant value resistance element exceeds a set value, the control circuit board sends a signal to a driving motor and controls the driving motor to rotate, then a rotary connecting lever is driven to rotate, and the rotary connecting lever rotates to drive a tripping device to trip so that the circuit breaker is switched off. The voltage set value in the control circuit board can be adjusted according to actual needs, and the overload protection value of the circuit breaker can be adjusted, so the overload protection device for the circuit breaker can flexibly adjust the overload protection current value of the circuit breaker.
Description
Technical field
The present invention relates to overload protection arrangement and the control method thereof of a kind of chopper, belong to miniature circuit breaker technology neck
Territory.
Background technology
As it is shown in figure 1, miniature circuit breaker generally comprises an operating unit 1 and multi-phase circuit breaker unit 2, operating unit 1
In be provided with motor-operating mechanism, breaker unit 2 is provided with moving contact, static contact and trip gear, electronic in operating unit 1
Operating mechanism can be with operating breaker separating brake or combined floodgate.Overload protection arrangement it is additionally provided with, if in chopper in chopper
The electric current of carrying is excessive, and overload protection arrangement triggers trip gear and threads off, so that breaker open operation, to avoid danger.
Prior art generally uses bimetal leaf trip gear to realize overload protection, bimetal leaf is connected and touches with dynamic
Between head and outlet terminal, bimetal leaf carrying flows through the electric current of moving contact, when in main circuit, electric current is excessive, in bimetal leaf
Produce heat and make bimetal leaf flexural deformation thus drive trip gear unlock make breaker open operation.But, on the one hand, double gold
Produced by genus sheet, the characteristic relation between deflection and the electric current wherein passed through is unalterable, is passed through in chopper
When electric current exceedes certain value, bimetal leaf will be deformed and make circuit breaker tripping separating brake, makes bi-metal plate deformed thread off
Overload protection current value is certain, it is impossible to adjust according to the actual needs.On the other hand, the deflection of bimetal leaf is by temperature
Degree impact it is obvious that so, when the temperature varies, the deflection of bimetal leaf may be not enough so that trip gear solution
Lock, owing to the overcurrent in chopper can not be cut off in time, circuit and the equipment that is connected in circuit may be by
Overcurrent damages.
Summary of the invention
The shortcoming of prior art in view of the above, it is an object of the invention to provide the overload protection dress of a kind of chopper
Put and control method, it is possible to provide reliable overload protection mode for chopper.
For achieving the above object and other relevant purposes, the present invention provides the overload protection arrangement of a kind of chopper, uses
Following technical scheme: the overload protection arrangement of a kind of chopper, including including trip gear, moving contact and static contact, described stationary contact
Head and input terminal connect, and described moving contact and outlet terminal connect；Also including a control circuit board, control circuit board is provided with
Voltage acquisition module and voltage comparison module；Connect between described input terminal and outlet terminal and have certain value resistive element, fixed
Two connection ends of value resistive element are connected with the voltage acquisition module on control circuit board；Described control circuit board and driving electricity
Machine connects, and drives motor and to rotate connecting lever and is in transmission connection, and described rotation connecting lever is in transmission connection with trip gear.
Preferably, described fixed value resistance element is a copper-manganese sheet.
Preferably, described fixed value resistance element is connected between moving contact and outlet terminal.
Preferably, described fixed value resistance element one end is connected with moving contact by a connecting piece, and the other end passes through second
Connect sheet to be connected with outlet terminal.
Preferably, described a connecting piece is connected by flexible circuit conductor with moving contact.
Preferably, between described driving motor and rotation connecting lever, it is provided with a driving runner, drives motor and drive runner biography
It is dynamically connected；The wheel rim driving runner is provided with a drive block, rotates connecting lever and has a cantilever arm, drives cam to rotate and can make driving
Block is stirred cantilever arm thus connecting lever is rotated and rotates.
Preferably, described rotation connecting lever being also associated with the elastomeric connector strip of bending, one end of elastomeric connector strip is fixed on
Rotating on connecting lever, the other end of elastomeric connector strip is connected on a fixing axle parallel with the rotation axis rotating connecting lever.
Further, described rotation connecting lever be connected on a universal driving shaft and with universal driving shaft synchronous rotary；Described universal driving shaft
It is in transmission connection with trip gear.
Further, the motor-operating mechanism operating breaker separating brake of described driving driven by motor chopper or combined floodgate.
With the overload protection arrangement of a kind of chopper of the present invention correspondingly, the present invention also provides for the overload of a kind of chopper
The control method of protection device, adopts the following technical scheme that the control method of the overload protection arrangement of a kind of chopper, in employing
State the overload protection arrangement of chopper described in technical scheme and the preferred technical scheme of any one, including following operating procedure:
1) voltage acquisition module accepts to gather the magnitude of voltage V1 at fixed value resistance element two ends；
2) the magnitude of voltage V1 that voltage acquisition module is gathered by voltage comparison module from fixed value resistance element two ends and setting
Magnitude of voltage V2 compares；
3) in step 2) in, if V1 >=V2, then control circuit board is to driving motor to send overlond trip signal, drives electricity
Machine is rotated connecting lever and rotates, and rotates connecting lever and drives trip gear to thread off so that breaker open operation；
4) in step 2) in, if V1 is ＜ V2, then control circuit board is to driving motor to send out actuating signal.
As it has been described above, the overload protection arrangement of a kind of chopper of the present invention and control method thereof, there is following useful effect
Really: have fixed value resistance element owing to being connected between input terminal with outlet terminal, two of fixed value resistance element connection ends with
The voltage acquisition module of control circuit board connects, and voltage acquisition module can gather fixed value resistance element two and connect between end
Magnitude of voltage, when the electric current flowed through in fixed value resistance element exceedes rated load, voltage acquisition module is able to detect that definite value electricity
The magnitude of voltage at resistance element two ends exceedes setting value, and control circuit board will send signal to driving means and control driving means band
Dynamic trip gear is threaded off and is made breaker open operation.According to the actual needs, the voltage setting value in control circuit board can be adjusted,
Thus can adjust the overload protection current value of chopper, make chopper pass through at different overcurrents according to practical situation
Time dropout separating brake, so, the overload protection arrangement of a kind of chopper of the present invention can adjust neatly chopper overload protect
Protect current value.
Accompanying drawing explanation
Fig. 1 is shown as the operating unit of chopper and the connection diagram of breaker unit.
Fig. 2 is shown as breaker unit structural representation, and shell is removed.
Fig. 3 is illustrated operate as unit detonation configuration schematic diagram.
Fig. 4 is shown as motor-operating mechanism and rotates the connection diagram of the parts such as connecting lever, driving runner.
Fig. 5 is shown as control circuit board and drives motor, the annexation schematic diagram of fixed value resistance element.
Piece mark explanation
1 operating unit 12 a connecting piece
2 breaker units 13 second connect sheet
3 first half-shell body 14 flexible circuit conductors
4 second half shell 15 motor-operating mechanisms
5 trip gears 16 drive motor
6 moving contacts 17 rotate connecting lever
7 static contact 18 rotary shafts
8 input terminal 19 rotary handles
9 outlet terminals 20 drive runner
10 control circuit board 21 drive blocks
11 fixed value resistance element 22 universal driving shafts
Detailed description of the invention
Below by way of specific instantiation, embodiments of the present invention being described, those skilled in the art can be by this specification
Disclosed content understands other advantages and effect of the present invention easily.The present invention can also be by the most different concrete realities
The mode of executing is carried out or applies, the every details in this specification can also based on different viewpoints and application, without departing from
Various modification or change is carried out under the spirit of the present invention.
Incorporated by reference to reference to Fig. 1, Fig. 2 and Fig. 3, the present invention provides the overload protection arrangement of a kind of chopper, including dress of threading off
Putting 5, moving contact 6 and static contact 7, described static contact 7 and input terminal 8 connect, and described moving contact 6 and outlet terminal 9 connect；Also
Including a control circuit board 10, control circuit board 10 is provided with voltage acquisition module and voltage comparison module；Described input terminal 8
With connection has certain value resistive element 11 between outlet terminal 9, two connection ends of fixed value resistance element 11 and control circuit board
Voltage acquisition module on 10 connects；Control circuit board 10 is connected with driving means, described driving means and trip gear 5 transmission
Connect.Fixed value resistance element 11 is had, two of fixed value resistance element 11 owing to being connected between input terminal 8 with outlet terminal 9
Connecting end to be connected with the voltage acquisition module of control circuit board 10, voltage acquisition module can gather fixed value resistance element 11 two
Connect the magnitude of voltage between end, when the electric current flowed through in fixed value resistance element 11 exceedes rated load, voltage acquisition module energy
Enough detecting that the magnitude of voltage at fixed value resistance element 11 two ends exceedes setting value, control circuit board 10 will send letter to driving means
Number and control driving means drive trip gear 5 thread off and make breaker open operation.According to the actual needs, control line can be adjusted
Voltage setting value in the plate of road, thus can adjust the overload protection current value of chopper, make chopper according to practical situation
The dropout separating brake when different overcurrents passes through, so, the overload protection arrangement of a kind of chopper of the present invention can be flexible
Ground adjusts the overload protection current value of chopper.
Additionally, due to the resistance of fixed value resistance will not produce bigger change with temperature, so, a kind of open circuit of the present invention
The overload protection arrangement of device can provide overload protection for chopper more reliably.
In a kind of protection device for circuit breaker of the present invention, described driving means is in transmission connection with trip gear 5, is driving
Under the drive of device, trip gear 5 action is so that chopper unlocks and separating brake.As shown in Figure 3 and Figure 4, driving means is permissible
Including a driving motor 16, drive motor 16 can rotate forward or invert so that breaker open operation or combined floodgate, drive motor 16
Rotate connecting lever 17 with one to be in transmission connection, rotate connecting lever 17 and be in transmission connection with trip gear 5, by control circuit board 10 and driving motor
16 connect, and so, when the electric current passed through in fixed value resistance element 11 is excessive, control circuit board 10 will control to drive motor 16
Action, drives motor 16 that connecting lever 17 is rotated and rotates, and rotates connecting lever 17 and drives trip gear 5 to make chopper unlock and separating brake.
Those skilled in the art are visible, drive motor 16 and the various ways that is connected with rotating connecting lever 17 realizes, for the ease of driving
The dynamic connecting lever 17 that rotates rotates, as the preferred mode of one, as shown in Figure 4, between described driving motor 16 and rotation connecting lever 17
It is provided with a driving runner 20, drives and be in transmission connection between motor 16 and driving runner 20；The wheel rim driving runner 20 is provided with one
Drive block 21, rotates connecting lever 17 and is connected in rotary shaft 18, drives runner 20 to rotate and drive block 21 can be made to stir rotation connecting lever 17
Rotating around rotary shaft 18, can connect a universal driving shaft 22 rotating on connecting lever, one end of universal driving shaft 22 connects 17 with rotating connecting lever
Connecing, the other end extend in breaker unit and is connected with the dropout connecting lever (not shown) in trip gear, rotates connecting lever 17
Rotation can drive dropout connecting lever the most synchronously to rotate, thus drives trip gear 5 to unlock so that breaker open operation.
Being generally provided with motor-operating mechanism 15 in chopper, motor-operating mechanism 15 is generally located on operating unit 1
In housing, as it is shown on figure 3, operating unit 1 has the shell being made up of first half-shell body 3 and the second half shell 4, first half-shell body
3 and second are provided with control circuit board 10 and motor-operating mechanism 15, control circuit board 10 and electric operating machine between half shell 4
The driving motor 16 of structure 15 connect and control drive motor 16 driving electric operating mechanism 15 make each breaker unit 2 separating brake or
Close a floodgate, as the preferred mode of one, as shown in Figure 4, in a kind of protection device for circuit breaker of the above-mentioned present invention, described driving
Device is the motor-operating mechanism 15 of chopper, and motor-operating mechanism 15 is in transmission connection with the rotary handle of chopper, electronic behaviour
The rotary handle 19 driving motor 16 driving electric operating mechanism 15 operating breaker making mechanism 15 rotates so that chopper
Separating brake or combined floodgate, motor-operating mechanism 15 is also in transmission connection with trip gear 5 and trip gear 5 can be driven to unlock so that breaking
Road device separating brake.
It should be noted that the fixed value resistance element 11 in a kind of protection device for circuit breaker of the present invention refers to resistance value
Atmospheric temperature changes insensitive resistive element, and the temperature coefficient of resistivity of fixed value resistance element 11 is minimum, when greatly
When gas ambient temperature changes, the resistance value of fixed value resistance element 11 is basically unchanged or small change only occurs.As
A kind of preferably mode, described fixed value resistance element 11 is a copper-manganese sheet, and the resistivity of copper-manganese material is to temperature-insensitive, and is
A kind of industrial conductive material being easily obtained, it is easy to processing and manufacturing, cost is relatively low.As shown in Figure 2, it is preferable that described definite value electricity
Resistance element 11 is connected between moving contact 6 and outlet terminal 9, so, need not arrange bimetal leaf again and thread off in chopper
Device 5, replaces bimetal leaf trip gear 5 that chopper is carried out overload protection with a kind of protection device for circuit breaker of the present invention,
Electric current in chopper main circuit is through fixed value resistance element 11, and when current is excessive, control circuit board 10 detection obtains definite value
Resistive element 11 two connects the voltage between end and increases and control to drive motor 16 action trip gear 5 to unlock, so that disconnected
Road device separating brake.As in figure 2 it is shown, described fixed value resistance element 11 one end is connected with moving contact 6 by a connecting piece 12, definite value electricity
The other end of resistance element 11 is connected with outlet terminal 9 by the second connection sheet 13.Due to moving contact 6 meeting when separating brake or combined floodgate
Motion, in order to not affect the motion of moving contact 6, described a connecting piece 12 is connected by flexible circuit conductor 14 with moving contact 6.
Fig. 5 is shown as control circuit board 10 and drives motor 16, the annexation schematic diagram of fixed value resistance element 11, in control
Being provided with voltage acquisition module and voltage comparison module in wiring board 10 processed, voltage acquisition module gathers fixed value resistance element 11 two
Connecting the magnitude of voltage between end, be designated as V1, in control circuit plate, storage has the magnitude of voltage of a setting, is designated as V2；Voltage ratio is relatively
V1 and V2 is compared size by module, and the output control that control circuit board 10 is drawn according to voltage comparison module drives motor
The action of 16.Below in conjunction with Fig. 5, the control method of the overload protection arrangement of a kind of chopper of the present invention is explained, this
The control method of the overload protection arrangement of bright a kind of chopper, uses technique scheme and arbitrary preferred technical scheme institute
The overload protection arrangement of the chopper stated, including following operating procedure:
1) voltage acquisition module accepts to gather the magnitude of voltage V1 at fixed value resistance element 11 two ends；
2) voltage acquisition module is gathered by voltage comparison module from fixed value resistance element 11 two ends magnitude of voltage V1 and setting
Magnitude of voltage V2 compare；
3) in step 2) in, if V1 >=V2, then control circuit board 10 is to driving motor 16 to send overlond trip signal, drives
Galvanic electricity machine 16 is rotated connecting lever 17 and rotates, and rotates connecting lever 17 and drives trip gear 5 to thread off so that breaker open operation；
4) in step 2) in, if V1 is ＜ V2, then control circuit board 10 is to driving 16 actuating signals of motor.
It should be noted that described setting voltage value V2 can be adjusted according to actual needs.
The principle of above-described embodiment only illustrative present invention and effect thereof, not for limiting the present invention.Any ripe
Above-described embodiment all can be modified under the spirit and the scope of the present invention or change by the personage knowing this technology.Cause
This, have usually intellectual such as complete with institute under technological thought without departing from disclosed spirit in art
All equivalences become are modified or change, and must be contained by the claim of the present invention.
Claims (10)
1. an overload protection arrangement for chopper, including including trip gear (5), moving contact (6) and static contact (7), described quiet
Contact (7) and input terminal (8) connect, and described moving contact (6) and outlet terminal (9) connect；It is characterized in that:
Also include that a control circuit board (10), control circuit board (10) are provided with voltage acquisition module and voltage comparison module；Institute
State to connect between input terminal (8) and outlet terminal (9) and have certain value resistive element (11), two of fixed value resistance element (11)
Connect end to be connected with the voltage acquisition module on control circuit board (10)；
Described control circuit board (10) is connected with driving motor (16), drives motor (16) to rotate connecting lever (17) transmission even with one
Connecing, described rotation connecting lever (17) is in transmission connection with trip gear (5).
2. the overload protection arrangement of chopper as claimed in claim 1, is characterized in that: described fixed value resistance element (11) is one
Copper-manganese sheet.
3. the overload protection arrangement of chopper as claimed in claim 1, is characterized in that: described fixed value resistance element (11) connects
Between moving contact (6) and outlet terminal (9).
4. the overload protection arrangement of chopper as claimed in claim 3, is characterized in that: described fixed value resistance element (11) one end
Being connected with moving contact (6) by a connecting piece (12), the other end is connected with outlet terminal (9) by the second connection sheet (13).
5. the overload protection arrangement of chopper as claimed in claim 4, is characterized in that: described a connecting piece (12) is touched with dynamic
Head (6) is connected by flexible circuit conductor (14).
6. the overload protection arrangement of chopper as claimed in claim 1, is characterized in that: described driving motor (16) is turned with rotation
It is provided with a driving runner (20) between arm (17), drives motor (16) to be in transmission connection with driving runner (20)；Drive runner (20)
Wheel rim be provided with a drive block (21), rotate connecting lever (17) and there is a cantilever arm (18), drive cam to rotate and can make drive block
(21) stir cantilever arm (18) thus connecting lever (17) is rotated and rotates.
7. the overload protection arrangement of chopper as claimed in claim 1, is characterized in that: be also connected with on described rotation connecting lever (17)
Having the elastomeric connector strip (19) of bending, one end of elastomeric connector strip (19) is fixed in rotation connecting lever (17), elastomeric connector strip
(19) the other end is connected on a fixing axle (22) parallel with the rotation axis rotating connecting lever (17).
8. the overload protection arrangement of chopper as claimed in claim 1, is characterized in that: described rotation connecting lever (17) is connected to one
Root universal driving shaft (23) upper and with universal driving shaft (23) synchronous rotary；Described universal driving shaft (23) is in transmission connection with trip gear (5).
9. the overload protection arrangement of chopper as claimed in claim 1, is characterized in that: described driving motor (16) drives open circuit
Motor-operating mechanism (15) the operating breaker separating brake of device or combined floodgate.
10. a control method for the overload protection arrangement of chopper, is characterized in that: use described in any one of claim 1 to 8
The overload protection arrangement of chopper, including following operating procedure:
1) voltage acquisition module accepts to gather the magnitude of voltage V1 at fixed value resistance element (11) two ends；
2) the magnitude of voltage V1 that voltage acquisition module is gathered by voltage comparison module from fixed value resistance element (11) two ends and setting
Magnitude of voltage V2 compares；
3) in step 2) in, if V1 >=V2, then control circuit board (10) is to driving motor (16) to send overlond trip signal, drives
Galvanic electricity machine (16) is rotated connecting lever (17) and rotates, and rotates connecting lever (17) and drives trip gear (5) to thread off so that chopper divides
Lock；
4) in step 2) in, if V1 is ＜ V2, then control circuit board (10) is to driving motor (16) to send out actuating signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610753534.0A CN106328457A (en) | 2016-08-29 | 2016-08-29 | Overload protection device for circuit breaker and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610753534.0A CN106328457A (en) | 2016-08-29 | 2016-08-29 | Overload protection device for circuit breaker and control method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106328457A true CN106328457A (en) | 2017-01-11 |
Family
ID=57788295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610753534.0A Pending CN106328457A (en) | 2016-08-29 | 2016-08-29 | Overload protection device for circuit breaker and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106328457A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107086161A (en) * | 2017-06-10 | 2017-08-22 | 南京日新科技有限公司 | The coil of method, breaker and magnetictrip that breaker built-in current is sampled |
| CN107422671A (en) * | 2017-07-21 | 2017-12-01 | 中国电力科学研究院 | A kind of intelligent current limliting based on copper-manganese resistance sampling takes control breaker and current-limiting method |
| CN107422162A (en) * | 2017-07-21 | 2017-12-01 | 中国电力科学研究院 | A kind of intelligent current limliting based on current transformer sampling takes control open-circuit system and method |
| CN107946102A (en) * | 2017-12-21 | 2018-04-20 | 浙江正泰机电电气有限公司 | A kind of reclosing on-load switch |
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| CN205335203U (en) * | 2016-02-15 | 2016-06-22 | 佳一电气有限公司 | Intelligence circuit breaker composite set |
| CN105788984A (en) * | 2016-05-04 | 2016-07-20 | 浙江格亚电气有限公司 | Operating mechanism of circuit breaker and control method thereof |
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| CN102804528A (en) * | 2009-06-23 | 2012-11-28 | 松下电器产业株式会社 | Apparatus For Protecting Direct Current Branch Circuit |
| EP2383766A1 (en) * | 2010-04-30 | 2011-11-02 | Bticino S.P.A. | Electrical resetting apparatus adapted to be associated to a protection device for automatic resetting thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107086161A (en) * | 2017-06-10 | 2017-08-22 | 南京日新科技有限公司 | The coil of method, breaker and magnetictrip that breaker built-in current is sampled |
| CN107422671A (en) * | 2017-07-21 | 2017-12-01 | 中国电力科学研究院 | A kind of intelligent current limliting based on copper-manganese resistance sampling takes control breaker and current-limiting method |
| CN107422162A (en) * | 2017-07-21 | 2017-12-01 | 中国电力科学研究院 | A kind of intelligent current limliting based on current transformer sampling takes control open-circuit system and method |
| CN107946102A (en) * | 2017-12-21 | 2018-04-20 | 浙江正泰机电电气有限公司 | A kind of reclosing on-load switch |
| CN107946102B (en) * | 2017-12-21 | 2020-09-18 | 浙江正泰机电电气有限公司 | Reclosing load switch |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170111 |