CN108872840A - A kind of mimic-disconnecting switch - Google Patents
A kind of mimic-disconnecting switch Download PDFInfo
- Publication number
- CN108872840A CN108872840A CN201810435204.6A CN201810435204A CN108872840A CN 108872840 A CN108872840 A CN 108872840A CN 201810435204 A CN201810435204 A CN 201810435204A CN 108872840 A CN108872840 A CN 108872840A
- Authority
- CN
- China
- Prior art keywords
- separating brake
- control loop
- circuit
- closing
- contact
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3272—Apparatus, systems or circuits therefor
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Keying Circuit Devices (AREA)
Abstract
Mimic-disconnecting switch of the present invention is suitable for Simple circuit for testing, including control power supply and the shutting-brake control loop connecting with the control power supply, separating brake control loop, anti-jump loop, instruction circuit of closing a floodgate, separating brake instruction circuit and contactor control loop；The shutting-brake control loop, the separating brake control loop, combined floodgate instruction circuit, separating brake instruction circuit and the contactor control loop are successively in parallel；The present invention is connected across between shutting-brake control loop and separating brake control loop using separating brake relay normally opened contact, is completed anti-bouncing function, is simplified circuit design；In the novel circuit design principle of the shutting-brake control loop of proposition, using the realization self-sustaining of closing relay moving together contact, closing locking is realized using separating brake relay dynamic circuit breaker contact；In the novel circuit design principle of the separating brake control loop of proposition, separating brake is started using manual brake separating button or external protective relaying device.
Description
Technical field
The present invention relates to technical field of integrated circuits more particularly to a kind of easily-testing mimic-disconnecting switches.
Background technique
It is also most complicated one of electrical equipment that breaker, which is most important in electric system high-tension switch gear, is normally being transported
When row it can on-off load current, when system jam, it can disconnect rapidly short circuit under the action of relay protection
Electric current, therefore breaker carries the dual role of control and protection.Practical breaker is due to its control circuit complexity, movement
(such as spring energy-storage, fluid pressure type, electromagnetic type operating mechanism) is usually completed by operating mechanism, therefore its price is higher, body
Product is larger, and scientific research institution generally uses mimic-disconnecting switch to carry out the function of mimic-disconnecting switch, can be used for complete protective relaying device
Total group test, it can real simulation breaker tripping and combined floodgate, avoid due to be repeated several times total group test and keep breaker anti-
Thus compound separating brake is reduced and is impacted to breaker performance itself.But mimic-disconnecting switch is as used existing breaker control
Circuit processed, circuit is complex, and the relay of use is also more.
Summary of the invention
Meeting basic item required for breaker control circuit in view of the deficiencies of the prior art, the present invention provides a kind of
Under part, control circuit is improved, design is more simplified, component used is less, more practical mimic-disconnecting switch.Its specific technical solution
It is as follows：
The present invention provides a kind of mimic-disconnecting switches, including control power supply and the combined floodgate control connecting with the control power supply
Circuit, separating brake control loop, anti-jump loop, instruction circuit of closing a floodgate, separating brake instruction circuit and contactor control loop processed；
The shutting-brake control loop, the separating brake control loop, the combined floodgate instruction circuit, the separating brake instruction circuit and
The contactor control loop is successively in parallel；
The anti-jump loop is connected across between the shutting-brake control loop and the separating brake control loop.
Further, the shutting-brake control loop includes closing relay moving together contact YC1, closing by hand button SB1, protects
Protect combined floodgate moving together contact K1, separating brake relay dynamic circuit breaker contact YR1 and closing relay YC；The YC1, the SB1 and the K1
Successively in parallel, the circuit after parallel connection is successively connected with the coil of the YR1, the YC.
Further, the separating brake control loop includes manual brake separating button SB2, protection separating brake moving together contact KCO and divides
Lock relay YR；The SB2 is in parallel with the KCO, and the circuit after parallel connection is connected with the coil of the YR.
Further, the anti-jump loop is connected across the shutting-brake control loop by separating brake relay normally opened contact YR2
Between the separating brake control loop, also, the anti-jump loop is returned the YC1, the SB1 and the K1 are successively in parallel
After road, before the coil of the YR.
Further, the combined floodgate instruction circuit is by closing relay moving together contact YC2, combined floodgate indicator light HR and current limliting electricity
Resistance R1 is sequentially connected in series.
Further, the separating brake instruction circuit is by closing relay break contact YC3, separating brake indicator light HG and current limliting electricity
Resistance R2 is sequentially connected in series.
Further, the contactor control loop by closing relay moving together contact YC4 and contactor QF coil string
The contact of connection composition, the QF connects external control circuit.
Further, when closing a floodgate, SB1 or closure K1 is pressed, controls the electric current of power supply by SB1 or K1, and be in
The YR1 of closed state, starts the coil of YC, and after the coil motion of YC, YC1, YC2 and YC4 closure, YC3 are disconnected, and combined floodgate indicates back
HR in road is lighted, and the HG lamp in separating brake instruction circuit goes out, and the wire loop starting of the QF, the contact closure of the OF connects
Logical external control circuit.
Further, in separating brake, SB2 or closure KCO is pressed, the electric current of power supply is controlled by SB2 or KCO, starts YR
Coil, after the coil motion of YR, YR1 is disconnected, and the wire loop of YC disconnects power loss, YC3 closure, and YC1, YC2 and YC4 are disconnected,
It closes a floodgate and indicates that the HR lamp in circuit goes out, the HG in separating brake instruction circuit is lighted, and the wire loop of the QF disconnects, the touching of the OF
Head separating brake, disconnects external control circuit.
Further, anti-jump loop；When breaker closing is to route permanent fault, if the SB1 dwell time
Too long or K1 cannot be disconnected, when protection exit moving together contact KCO is closed the coil of starting YR, on the one hand, break contact YR1
Shutting-brake control loop is disconnected, prevent shutting-brake control loop from closing a floodgate again；On the other hand, moving together contact YR2 is closed, so that YR
Coil can obtain power supply from SB1 or K1 to keep gate-dividing state, realize anti-jump.
As seen from the above technical solution provided by the invention, the present invention is meeting required for breaker control circuit
Under primary condition, control circuit is improved, design is more simplified, component used is less, more practical mimic-disconnecting switch.
The additional aspect of the present invention and advantage will be set forth in part in the description, these will become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill of field, without any creative labor, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the loop structure schematic diagram of mimic-disconnecting switch described in the embodiment of the present invention.
【Appended drawing reference】
YC1- closing relay moving together contact, SB1- closing by hand button, K1 protect combined floodgate moving together contact, YR1 separating brake after
Electric appliance dynamic circuit breaker contact, YC closing relay, SB2- manual brake separating button, KCO- protect separating brake moving together contact, YR- separating brake relay
Device, YR2- separating brake relay normally opened contact, YC2- closing relay moving together contact, HR- combined floodgate indicator light, R1- current-limiting resistance,
YC3- closing relay break contact, HG- separating brake indicator light, R2- current-limiting resistance, YC4- closing relay moving together contact, QF- connect
Tentaculum.
Specific embodiment
Embodiments of the present invention are described below in detail, the example of the embodiment is shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and for explaining only the invention, and is not construed as limiting the claims.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singular " one " used herein, " one
It is a ", " described " and "the" may also comprise plural form.It is to be further understood that being arranged used in specification of the invention
Diction " comprising " refer to that there are the feature, integer, step, operation, element and/or component, but it is not excluded that in the presence of or addition
Other one or more features, integer, step, operation, element, component and/or their group.It should be understood that when we claim member
Part is " connected " or when " coupled " to another element, it can be directly connected or coupled to other elements, or there may also be
Intermediary element.In addition, " connection " used herein or " coupling " may include being wirelessly connected or coupling.Wording used herein
"and/or" includes one or more associated any cells for listing item and all combinations.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (including technology art
Language and scientific term) there is meaning identical with the general understanding of those of ordinary skill in fields of the present invention.Should also
Understand, those terms such as defined in the general dictionary, which should be understood that, to be had and the meaning in the context of the prior art
The consistent meaning of justice, and unless defined as here, it will not be explained in an idealized or overly formal meaning.
To be done by taking several specific embodiments as an example into one below in conjunction with attached drawing convenient for the understanding to technical solution of the present invention
The explanation of step, and each embodiment does not constitute the restriction to the embodiment of the present invention.
The present embodiment provides a kind of mimic-disconnecting switches of easily-testing, including control power supply, and connect with control power supply
Shutting-brake control loop, separating brake control loop, anti-jump loop, instruction circuit of closing a floodgate, separating brake instruction circuit and the contactor control connect
Circuit；
The shutting-brake control loop, the separating brake control loop, the combined floodgate instruction circuit, the separating brake instruction circuit and
The contactor control loop is successively in parallel；
The anti-jump loop is connected across between the shutting-brake control loop and the separating brake control loop.
The specific loop structure of mimic-disconnecting switch described in the present embodiment is as shown in connection with fig. 1：
In the present embodiment, the structure of the shutting-brake control loop is：Closing relay moving together contact YC1, closing by hand
Button SB1 and protection combined floodgate moving together contact K1 are in parallel, it is in parallel after again with separating brake relay dynamic circuit breaker contact YR1, closing relay YC
Coil be sequentially connected in series.
In the present embodiment, the structure of the separating brake control loop is：Manual brake separating button SB2 and protection separating brake dynamic circuit connector touching
Point KCO is in parallel, connects again with the coil of separating brake relay YR after in parallel.
In the present embodiment, the structure of the anti-jump loop is：Separating brake relay normally opened contact YR2 is connected across shutting-brake control
In circuit closing relay moving together contact YC1, closing by hand button SB1 and protection combined floodgate moving together contact K1 parallel connection point after, point
Before the coil of lock control loop separating brake relay YR.
In the present embodiment, the structure for closing a floodgate instruction circuit is：By closing relay moving together contact YC2, closing a floodgate refers to
Show that lamp HR is sequentially connected in series with current-limiting resistance R1.
In the present embodiment, the structure in separating brake instruction circuit is：Referred to by closing relay break contact YC3, separating brake
Show that lamp HG is sequentially connected in series with current-limiting resistance R2.
In the present embodiment, the structure of the contactor control loop is：By closing relay moving together contact YC4 with contact
The coil of device QF is composed in series；The contact of the QF is for connecting external control circuit.
Mimic-disconnecting switch described in the present embodiment, in use, the power supply of access AC or DC 220V.
The present embodiment additionally provides circuit of the mimic-disconnecting switch under on/off switch state, specially：
When combined floodgate, presses closing by hand button SB1 or be closed external relay protection combined floodgate moving together contact K1, control power supply warp
The contact SB1 or protection combined floodgate moving together contact K1 of closure, and the separating brake relay dynamic circuit breaker contact YR1 in closed state are crossed,
The coil for starting closing relay YC, after the coil motion of YC, corresponding three couples of moving together contact YC1, YC2 and YC4 closure, dynamic circuit breaker
Contact YC3 is disconnected；To shutting-brake control loop, moving together contact YC1 closure plays self-holding function；Circuit is indicated for closing a floodgate, and is moved
Conjunction contact YC2 starting combined floodgate indicator light HR is lighted；Circuit is indicated for separating brake, break contact YC3 disconnects separating brake indicator light HG lamp
It goes out；To contactor control loop, moving together contact YC4 connects the coil of contactor QF, and the contact of the QF closes a floodgate, outside control electricity
Road is connected.
When separating brake, presses manual brake separating button SB2 or be closed external protective relaying device separating brake moving together contact KCO, control
Contact SB2 or contact KCO of the power supply by closure, start the coil of separating brake relay YR, after the coil motion of YR, moving together contact
YR2 closure, break contact YR1 are disconnected；For shutting-brake control loop, break contact YR1 disconnects closing circuit, closing relay YC
Coil return, corresponding three couples of moving together contact YC1, YC2 and YC4 are disconnected, break contact YC3 closure；Combined floodgate is indicated back
Road, moving together contact YC2 disconnect combined floodgate indicator light HR lamp and go out；Circuit is indicated for separating brake, break contact YC3 closure starting separating brake refers to
Show that lamp HG is lighted；For contactor control loop, moving together contact YC4 disconnects the wire loop of contactor QF, the contact of the QF
It returns, external control circuit disconnects.
Anti-jump loop is designed, in the present embodiment, when breaker closing (closing by hand or automatic closing) arrives route
When permanent fault, if the closing by hand button SB1 dwell time is longer or protective relaying device contact K1 is stuck or viscous
It cannot firmly disconnect, when trip protection starts separating brake relay YR, on the one hand, break contact YR1 disconnects closing circuit, makes to close a floodgate
Circuit cannot close a floodgate again；On the other hand, moving together contact YR2 is closed, so that the coil of separating brake relay YR can be pressed from closing by hand
The button SB1 or contact K1 of protective relaying device adhesion obtains power supply to keep gate-dividing state, has thus reached anti-jump
Purpose.
In conclusion the present invention is connected across shutting-brake control loop and separating brake control loop using separating brake relay normally opened contact
Between, anti-bouncing function is completed, circuit design is simplified；In the novel circuit design principle of the shutting-brake control loop of proposition, use
Closing relay moving together contact realizes self-sustaining, realizes closing locking using separating brake relay dynamic circuit breaker contact；In point of proposition
In the novel circuit design principle of lock control loop, manual brake separating button or external protective relaying device starting separating brake are directlyed adopt.
The present invention meets the basic function of breaker control circuit, and control circuit design is simple, and component used is few,
It is more advantageous to the practical application of mimic-disconnecting switch.
Those of ordinary skill in the art will appreciate that：Attached drawing is the schematic diagram of one embodiment, module in attached drawing or
Process is not necessarily implemented necessary to the present invention.
All the embodiments in this specification are described in a progressive manner, same and similar portion between each embodiment
Dividing may refer to each other, and each embodiment focuses on the differences from other embodiments.Especially for device or
For system embodiment, since it is substantially similar to the method embodiment, so describing fairly simple, related place is referring to method
The part of embodiment illustrates.Apparatus and system embodiment described above is only schematical, wherein the conduct
The unit of separate part description may or may not be physically separated, component shown as a unit can be or
Person may not be physical unit, it can and it is in one place, or may be distributed over multiple network units.It can root
According to actual need that some or all of the modules therein is selected to achieve the purpose of the solution of this embodiment.Ordinary skill
Personnel can understand and implement without creative efforts.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with scope of protection of the claims
Subject to.
Claims (10)
1. a kind of mimic-disconnecting switch, which is characterized in that including control power supply and the shutting-brake control being connect with the control power supply
Circuit, separating brake control loop, anti-jump loop, instruction circuit of closing a floodgate, separating brake instruction circuit and contactor control loop；
The shutting-brake control loop, the separating brake control loop, combined floodgate instruction circuit, separating brake instruction circuit and described
Contactor control loop is successively in parallel；
The anti-jump loop is connected across between the shutting-brake control loop and the separating brake control loop.
2. mimic-disconnecting switch according to claim 1, which is characterized in that
The shutting-brake control loop includes closing relay moving together contact YC1, closing by hand button SB1, protection combined floodgate dynamic circuit connector touching
Point K1, separating brake relay dynamic circuit breaker contact YR1 and closing relay
YC；The YC1, the SB1 and the K1 are successively in parallel, it is in parallel after the circuit successively coil with the YR1, the YC
Series connection.
3. mimic-disconnecting switch according to claim 2, which is characterized in that
The separating brake control loop includes manual brake separating button SB2, protection separating brake moving together contact KCO and separating brake relay YR；Institute
State that SB2 is in parallel with the KCO, it is in parallel after circuit connect with the coil of the YR.
4. mimic-disconnecting switch according to claim 3, which is characterized in that
The anti-jump loop is connected across the shutting-brake control loop by separating brake relay normally opened contact YR2 and the separating brake controls
Between circuit, also, the anti-jump loop is after the YC1, the SB1 and the K1 successively in parallel circuit, described
Before the coil of YR.
5. mimic-disconnecting switch according to claim 4, which is characterized in that
Combined floodgate instruction circuit is sequentially connected in series by closing relay moving together contact YC2, combined floodgate indicator light HR and current-limiting resistance R1
Composition.
6. mimic-disconnecting switch according to claim 5, which is characterized in that
Separating brake instruction circuit is sequentially connected in series by closing relay break contact YC3, separating brake indicator light HG and current-limiting resistance R2
Composition.
7. mimic-disconnecting switch according to claim 6, which is characterized in that
The contactor control loop is composed in series by closing relay moving together contact YC4 and the coil of contactor QF, the QF
Contact connect external control circuit.
8. mimic-disconnecting switch according to claim 7, which is characterized in that
When closing a floodgate, SB1 or closure K1 is pressed, the electric current for controlling power supply passes through SB1 or K1, and the YR1 in closed state,
The coil for starting YC, after the coil motion of YC, YC1, YC2 and YC4 closure, YC3 are disconnected, and the HR in instruction circuit of closing a floodgate is lighted,
HG lamp in separating brake instruction circuit goes out, the wire loop starting of the QF, and the contact closure of the OF connects external control electricity
Road.
9. mimic-disconnecting switch according to claim 8, which is characterized in that
In separating brake, SB2 or closure KCO is pressed, the electric current of power supply is controlled by SB2 or KCO, starts the coil of YR, the line of YR
After circle movement, YR1 is disconnected, and the wire loop of YC disconnects power loss, YC3 closure, and YC1, YC2 and YC4 are disconnected, in instruction circuit of closing a floodgate
HR lamp go out, the HG in separating brake instruction circuit is lighted, and the wire loop of the QF disconnects, the contact separating brake of the OF, is disconnected outer
Portion's control circuit.
10. mimic-disconnecting switch according to claim 9, which is characterized in that
Anti-jump loop；When breaker closing is to route permanent fault, if the SB1 dwell time is too long or K1 cannot
It disconnects, when protection exit moving together contact KCO is closed the coil of starting YR, on the one hand, break contact YR1 disconnects shutting-brake control and returns
Road, prevent shutting-brake control loop from closing a floodgate again；On the other hand, moving together contact YR2 is closed so that the coil of YR can from SB1 or
K1 obtains power supply to keep gate-dividing state, realizes anti-jump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810435204.6A CN108872840B (en) | 2018-05-09 | 2018-05-09 | A kind of mimic-disconnecting switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810435204.6A CN108872840B (en) | 2018-05-09 | 2018-05-09 | A kind of mimic-disconnecting switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108872840A true CN108872840A (en) | 2018-11-23 |
| CN108872840B CN108872840B (en) | 2019-11-15 |
Family
ID=64332953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810435204.6A Active CN108872840B (en) | 2018-05-09 | 2018-05-09 | A kind of mimic-disconnecting switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108872840B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110739947A (en) * | 2019-11-15 | 2020-01-31 | 广东电网有限责任公司 | Switch simulator for FTU debugging |
| CN111965461A (en) * | 2020-08-24 | 2020-11-20 | 华能山东发电有限公司烟台发电厂 | Multifunctional analog circuit breaker |
| CN112415373A (en) * | 2020-11-10 | 2021-02-26 | 国网新疆电力有限公司喀什供电公司 | Analog circuit breaker for substation spare power automatic switching test |
| CN113866616A (en) * | 2021-09-07 | 2021-12-31 | 山东钢铁集团日照有限公司 | Device and method for offline testing of LF refined 35kV high-voltage circuit breaker |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103606902A (en) * | 2013-11-15 | 2014-02-26 | 中山市明阳电器有限公司 | Anti-tripping circuit combining breaker and relay protection |
| CN104092300A (en) * | 2014-06-30 | 2014-10-08 | 国家电网公司 | 10kV handcart type high-voltage switch cabinet brake-separating monitoring loop |
| CN204179751U (en) * | 2014-09-19 | 2015-02-25 | 叶朋珍 | For the protective relaying device that control loop digitlization monitors |
| CN204287358U (en) * | 2014-12-18 | 2015-04-22 | 国家电网公司 | The debugging apparatus of intelligent controller |
| CN105047491A (en) * | 2015-08-26 | 2015-11-11 | 吉林瀚丰电气有限公司 | Anti-pumping device of permanent-magnet operation mechanism |
| CN205509481U (en) * | 2015-12-30 | 2016-08-24 | 广东电网有限责任公司茂名供电局 | Circuit breaker divides closing control circuit with overheat protection function |
| CN205959867U (en) * | 2016-08-16 | 2017-02-15 | 上海舒盈电气有限公司 | Outdoor high pressure spring operation vacuum circuit breaker's control circuit |
-
2018
- 2018-05-09 CN CN201810435204.6A patent/CN108872840B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103606902A (en) * | 2013-11-15 | 2014-02-26 | 中山市明阳电器有限公司 | Anti-tripping circuit combining breaker and relay protection |
| CN104092300A (en) * | 2014-06-30 | 2014-10-08 | 国家电网公司 | 10kV handcart type high-voltage switch cabinet brake-separating monitoring loop |
| CN204179751U (en) * | 2014-09-19 | 2015-02-25 | 叶朋珍 | For the protective relaying device that control loop digitlization monitors |
| CN204287358U (en) * | 2014-12-18 | 2015-04-22 | 国家电网公司 | The debugging apparatus of intelligent controller |
| CN105047491A (en) * | 2015-08-26 | 2015-11-11 | 吉林瀚丰电气有限公司 | Anti-pumping device of permanent-magnet operation mechanism |
| CN205509481U (en) * | 2015-12-30 | 2016-08-24 | 广东电网有限责任公司茂名供电局 | Circuit breaker divides closing control circuit with overheat protection function |
| CN205959867U (en) * | 2016-08-16 | 2017-02-15 | 上海舒盈电气有限公司 | Outdoor high pressure spring operation vacuum circuit breaker's control circuit |
Non-Patent Citations (1)
| Title |
|---|
| 魏存良 等: "微机保护防跳和断路器机构防跳的比较与选用", 《电工技术》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110739947A (en) * | 2019-11-15 | 2020-01-31 | 广东电网有限责任公司 | Switch simulator for FTU debugging |
| CN111965461A (en) * | 2020-08-24 | 2020-11-20 | 华能山东发电有限公司烟台发电厂 | Multifunctional analog circuit breaker |
| CN112415373A (en) * | 2020-11-10 | 2021-02-26 | 国网新疆电力有限公司喀什供电公司 | Analog circuit breaker for substation spare power automatic switching test |
| CN113866616A (en) * | 2021-09-07 | 2021-12-31 | 山东钢铁集团日照有限公司 | Device and method for offline testing of LF refined 35kV high-voltage circuit breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108872840B (en) | 2019-11-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108872840A (en) | A kind of mimic-disconnecting switch | |
| CN101317243B (en) | Circuit breaker including open neutral interlock | |
| CN110456267A (en) | The method of the reason of for determining voltage interruption, auxiliary unit and electric system | |
| CN102484017A (en) | First-fail-safe electromotive furniture drive | |
| CN109565259A (en) | Isolating device for photovoltaic string | |
| CN205666609U (en) | A protection circuit that is used for changeablely switching transformation ratio than current transformer | |
| CN201072735Y (en) | Shunt release capable of detecting working condition of breaker | |
| CN101868842B (en) | System and method for protecting a coil structure in a controlled switch | |
| CN110901448B (en) | Emergency stop control device for alternating-current charging pile and alternating-current charging pile | |
| CN106683945B (en) | Emergency stop control system and its control method | |
| CN109193583A (en) | A kind of internal bridge stub protection adaptively throws the safety control moved back | |
| CN101106044A (en) | Shunt release capable of detecting working state of circuit breaker | |
| CN201118276Y (en) | Earth leakage circuit-breaker inverse transmission preventing device | |
| CN209358241U (en) | A kind of internal bridge stub protection adaptively throws the control circuit moved back | |
| CN207731828U (en) | A kind of list is into the air switch for having more the distribution of concentrated protection electric energy | |
| CN207938553U (en) | DW15 type universal circuit breaker automatic switching-on devices | |
| CN108053899B (en) | Reactor shutdown circuit breaker test circuit | |
| CN106057555A (en) | Circuit breaker having safety switching part | |
| CN207424614U (en) | A kind of circuit-breaker remote control operation device | |
| CN101101836A (en) | Shunt opening release capable of being controlled by external electricity-breaking protection signal | |
| CN2935417Y (en) | Enforced remote-determined anti-error operation operating control device | |
| CN105356354B (en) | The apparatus for demonstrating of power supply system | |
| CN213027424U (en) | Protection circuit device capable of improving power supply reliability | |
| CN210744593U (en) | Electrical interlocking circuit of inlet wire cabinet, electrical interlocking device of inlet wire cabinet and PT cabinet | |
| CN210119513U (en) | Intelligent leakage protection circuit breaker of electric energy metering box |
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 |