CN209375124U - The faulty action preventing circuit and system of breaker unbalanced three-phase lines - Google Patents
The faulty action preventing circuit and system of breaker unbalanced three-phase lines Download PDFInfo
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- CN209375124U CN209375124U CN201822208523.1U CN201822208523U CN209375124U CN 209375124 U CN209375124 U CN 209375124U CN 201822208523 U CN201822208523 U CN 201822208523U CN 209375124 U CN209375124 U CN 209375124U
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- breaker
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Abstract
The utility model provides the faulty action preventing circuit and system of a kind of breaker unbalanced three-phase lines, is related to technical field of power systems, which includes: the start loop, timing circuit and action circuit being connected in parallel；Wherein, start loop includes the time relay；Timing circuit includes the normal opened contact and actuating relay of the sequentially connected time relay；Action circuit includes first group of three-phase auxiliary switch normally closed contact；Start loop is used to be powered when open-phase operation occurs for breaker；Timing circuit is used for the normal opened contact of the timing closing time relay after the time relay is in time status and excitation；Action circuit after actuating relay excitation for being powered, so that breaking coil is attracted, circuit breaker trip realizes the faulty action preventing operation of breaker unbalanced three-phase lines.The utility model can be such that the faulty action preventing of breaker unbalanced three-phase lines operates and reach preferable effect.
Description
Technical field
The utility model relates to technical field of power systems, more particularly, to a kind of faulty action preventing of breaker unbalanced three-phase lines
Circuit and system.
Background technique
It is taken place frequently in network system because staff accidentally touches equipment stoppage in transit thing caused by malfunction breaker body unbalanced three-phase lines
Story part requires to carry out mistaken collision preventing measure on breaker body unbalanced three-phase lines relay as anti-accident measures, general
Way is to install baffle additional, but the logical baffle that installs additional prevents the effect of breaker body unbalanced three-phase lines malfunction little, in breaker
The vibration or when accidentally touching with maloperation of staff of main body mechanism case are easy to cause ontology unbalanced three-phase lines relay to miss
It is dynamic.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of faulty action preventing circuit of breaker unbalanced three-phase lines and being
System can be such that the faulty action preventing of breaker unbalanced three-phase lines operates and reach preferable effect.
To achieve the goals above, the utility model embodiment the technical solution adopted is as follows:
In a first aspect, the utility model embodiment provides a kind of faulty action preventing circuit of breaker unbalanced three-phase lines, comprising:
Start loop, timing circuit and the action circuit being connected in parallel；Wherein, start loop includes the time relay；Timing circuit packet
Include the normal opened contact and actuating relay of the sequentially connected time relay；Action circuit includes that first group of three-phase auxiliary switch is normal
Close contact；Start loop is used to be powered when open-phase operation occurs for breaker；Wherein, the time relay is used in start loop
Start timing when energization；Timing circuit is used for the timing closing time relay after the time relay is in time status and excitation
The normal opened contact of device；Wherein, actuating relay is used for the excitation after timing circuit energization, the normal opened contact of control action relay
Closure；Action circuit after actuating relay excitation for being powered, so that breaking coil is attracted, circuit breaker trip realizes open circuit
The faulty action preventing of device unbalanced three-phase lines operates.
With reference to first aspect, the utility model embodiment provides the first possible embodiment of first aspect,
In, start loop includes the first switch group and second switch group being connected in series with the time relay；First switch group is used for
It is closed when normal operation of circuit breaker；Second switch group in normal operation of circuit breaker for disconnecting.
The possible embodiment of with reference to first aspect the first, the utility model embodiment provide the of first aspect
Two kinds of possible embodiments, wherein first switch group includes three-phase auxiliary switch normal opened contact, and three-phase auxiliary switch is normally opened to be connect
Point includes A phase normal opened contact, B phase normal opened contact and the C phase normal opened contact being connected in parallel.
The possible embodiment of with reference to first aspect the first, the utility model embodiment provide the of first aspect
Three kinds of possible embodiments, wherein second switch group includes second group of three-phase auxiliary switch normally closed contact, and second group of three-phase is auxiliary
Helping switch normally closed contact includes the A phase normally closed contact, B phase normally closed contact and C phase normally closed contact being connected in parallel.
With reference to first aspect, the utility model embodiment provides the 4th kind of possible embodiment of first aspect,
In, action circuit further include with first group of three-phase auxiliary switch normally closed contact be connected in series actuating relay normal opened contact and
Breaking coil；First group of three-phase auxiliary switch normally closed contact in normal operation of circuit breaker for disconnecting；Actuating relay it is normal
Contact is opened for being closed after actuating relay excitation；When breaking coil is used for at least phase disconnection in breaker three-phase,
And be powered after the normal opened contact of actuating relay closure, so that circuit breaker trip.
With reference to first aspect, the utility model embodiment provides the 5th kind of possible embodiment of first aspect,
In, faulty action preventing circuit by power supply power supply, start loop, timing circuit and action circuit be both connected to power supply positive and negative anodes it
Between.
The 4th kind of possible embodiment with reference to first aspect, the utility model embodiment provide the of first aspect
Six kinds of possible embodiments, wherein when normal operation of circuit breaker, first group of three-phase auxiliary switch normally closed contact of action circuit
It is in an off state, isolated power supply；If first group of three-phase auxiliary switch normally closed contact is in an off state and actuating relay
Normal opened contact be in closed state, action circuit power-off.
With reference to first aspect, the utility model embodiment provides the 7th kind of possible embodiment of first aspect,
In, above-mentioned faulty action preventing circuit further includes the lead for connecting with breaker.
With reference to first aspect, the utility model embodiment provides the 8th kind of possible embodiment of first aspect,
In, breaker is unbalanced three-phase lines breaker.
Second aspect, the utility model embodiment also provide a kind of faulty action preventing system of breaker unbalanced three-phase lines, including
Breaker, connect with breaker it is anti-such as any one of the 8th kind of possible embodiment of above-mentioned first aspect to first aspect
Malfunction circuit further includes the external equipment with faulty action preventing circuit connection.
The utility model embodiment provides the faulty action preventing circuit and system of a kind of breaker unbalanced three-phase lines, the faulty action preventing
Circuit includes the start loop, timing circuit and action circuit being connected in parallel, and start loop includes the time relay, timing circuit
Normal opened contact and actuating relay including the sequentially connected time relay, action circuit include that the first three-phase auxiliary switch is normal
Contact is closed, start loop makes breaker access performance loop in breaker electrifying, and timing circuit is in meter in the time relay
When state and excitation after, the normal opened contact of the timing closing time relay, action circuit is powered after actuating relay excitation, with
Make circuit breaker trip, realizes the faulty action preventing operation of breaker unbalanced three-phase lines.Since the breaker three-phase of the utility model is different
The faulty action preventing circuit of cause increases breaker three-phase auxiliary switch normally closed contact in action circuit, prevents from malfunctioning, and improves circuit
Reliability, therefore can make breaker unbalanced three-phase lines faulty action preventing operate reach preferable effect.
Other feature and advantage of the utility model will illustrate in the following description, also, partly from specification
In become apparent, or understood and implementing the utility model.The purpose of this utility model and other advantages are illustrating
Specifically noted structure is achieved and obtained in book, claims and attached drawing.
To enable the above objects, features, and advantages of the utility model to be clearer and more comprehensible, preferred embodiment is cited below particularly, and
Cooperate appended attached drawing, is described in detail below.
Detailed description of the invention
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art
Under the premise of labour, it is also possible to obtain other drawings based on these drawings.
Fig. 1 shows a kind of knot of the faulty action preventing circuit of breaker unbalanced three-phase lines provided by the utility model embodiment
Structure schematic diagram；
Fig. 2 shows the faulty action preventing circuits of another kind breaker unbalanced three-phase lines provided by the utility model embodiment
Structural schematic diagram；
Fig. 3 shows the faulty action preventing circuit of another kind breaker unbalanced three-phase lines provided by the utility model embodiment
Structural schematic diagram；
Fig. 4 shows a kind of knot of the faulty action preventing system of breaker unbalanced three-phase lines provided by the utility model embodiment
Structure schematic diagram.
Specific embodiment
To keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, below in conjunction with attached drawing to this
The technical solution of utility model is clearly and completely described, it is clear that described embodiment is that the utility model a part is real
Example is applied, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making
Every other embodiment obtained, fall within the protection scope of the utility model under the premise of creative work.
At present in the mistaken collision preventing measure of breaker body unbalanced three-phase lines relay, general way is installation baffle, but
It is logical to install that the effect that baffle prevents breaker body unbalanced three-phase lines from malfunctioning is little additional, breaker body mechanism case vibration or
When accidentally touching with maloperation of staff is easy to cause ontology unbalanced three-phase lines relay misoperation, is based on this, the utility model
The faulty action preventing circuit and system for a kind of breaker unbalanced three-phase lines that embodiment provides can make the anti-of breaker unbalanced three-phase lines
Malfunction operation reaches preferable effect.
For convenient for understanding the present embodiment, first to a kind of breaker three-phase disclosed in the utility model embodiment
Inconsistent faulty action preventing circuit describes in detail.
In one embodiment, the utility model embodiment provides a kind of faulty action preventing electricity of breaker unbalanced three-phase lines
Road, the structural schematic diagram of the faulty action preventing circuit of breaker unbalanced three-phase lines shown in Figure 1, as shown, the faulty action preventing is electric
Road includes: the start loop 10, timing circuit 20 and action circuit 30 being connected in parallel；Wherein, start loop 10 include the time after
Electric appliance 101；Timing circuit 20 includes the normal opened contact 201 and actuating relay 202 of the sequentially connected time relay 101；It is dynamic
Making circuit 30 includes first group of three-phase auxiliary switch normally closed contact 301.
Start loop is used in breaker electrifying, and breaker is made to access performance loop, wherein the time relay is used for
Start loop starts timing when being powered.
Timing circuit be used for after the time relay is in time status and excitation, the timing closing time relay it is normally opened
Contact, wherein actuating relay is used for the excitation after timing circuit energization, the normal opened contact closure of control action relay.
Action circuit after actuating relay excitation for being powered, so that circuit breaker trip, realizes that breaker three-phase is different
The faulty action preventing of cause operates.
The faulty action preventing circuit of above-mentioned breaker unbalanced three-phase lines provided by the embodiment of the utility model, including what is be connected in parallel
Start loop, timing circuit and action circuit, start loop include the time relay, and timing circuit includes the sequentially connected time
The normal opened contact and actuating relay of relay, action circuit include the first three-phase auxiliary switch normally closed contact, and start loop exists
When breaker electrifying, breaker is made to access performance loop, timing circuit prolongs after the time relay is in time status and excitation
When closing time relay normal opened contact, action circuit is powered after actuating relay excitation, so that circuit breaker trip, realizes
The faulty action preventing of breaker unbalanced three-phase lines operates.Due to the faulty action preventing circuit of the breaker unbalanced three-phase lines of the utility model,
Action circuit increases breaker three-phase auxiliary switch normally closed contact, prevents from malfunctioning, improves the reliability of circuit, therefore can
It operates the faulty action preventing of breaker unbalanced three-phase lines and reaches preferable effect.
Specifically, in breaker unbalanced three-phase lines, start loop is powered, and the time relay starts timing, and when
Between after relay excitation, in the normal opened contact closure of the time relay of timing circuit, timing circuit is powered, at this time timing circuit
Actuating relay excitation, action circuit is powered after actuating relay excitation, so that circuit breaker trip, realizes breaker three-phase
Inconsistent faulty action preventing operation.In normal operation of circuit breaker, the auxiliary switch for circuit breaker normally closed contact of action circuit, that is, above-mentioned
Third group three-phase auxiliary switch normally closed contact is in an off state, and action circuit does not turn on, and ontology three-phase can be effectively prevented
The malfunction of inconsistent relay.
The structural schematic diagram of the faulty action preventing circuit of another breaker unbalanced three-phase lines shown in Figure 2, in the base of Fig. 1
On plinth, also illustrate that first switch group 102, second switch group 103, three-phase auxiliary switch normal opened contact 102a, A phase is normally opened connects
Point 102a1, B phase normal opened contact 102a2, C phase normal opened contact 102a3, second group of three-phase auxiliary switch normally closed contact 103a, A phase
Normally closed contact 103a1, B phase normally closed contact 103a2, C phase normally closed contact 103a3, the normal opened contact 302 of actuating relay and tripping
Coil 303.
Start loop includes the first switch group and second switch group being connected in series with the time relay, and first switch group is used
It is closed when Yu Yu breaker coincidence, second switch group when with breaker quartile for being closed.
First switch group includes three-phase auxiliary switch normal opened contact, and three-phase auxiliary switch normal opened contact includes being connected in parallel
A phase normal opened contact, B phase normal opened contact and C phase normal opened contact.
Second switch group includes second group of three-phase auxiliary switch normally closed contact, and three-phase auxiliary switch normally closed contact includes parallel connection
A phase normally closed contact, B phase normally closed contact and the C phase normally closed contact of connection.
Above-mentioned first group of three-phase auxiliary switch normally closed contact, three-phase auxiliary switch normally closed contact include the A phase being connected in parallel
Normally closed contact, B phase normally closed contact and C phase normally closed contact and second group of three-phase auxiliary switch normally closed contact structure are identical.
Action circuit further includes the actuating relay being connected in series with above-mentioned first group of three-phase auxiliary switch normally closed contact
Normal opened contact and breaking coil, first group of three-phase auxiliary switch normally closed contact are acted for disconnecting in normal operation of circuit breaker
The normal opened contact of relay after actuating relay excitation for being closed；The breaking coil is for having one in breaker three-phase
It when phase quartile disconnects, and is powered after the normal opened contact of actuating relay closure, so that circuit breaker trip.
For faulty action preventing circuit by power supply power supply, start loop, timing circuit and action circuit are both connected to the positive and negative of power supply
Between pole.When normal operation of circuit breaker, first group of three-phase auxiliary switch normally closed contact of action circuit is in an off state.If
First group of three-phase auxiliary switch normally closed contact is in an off state and the normal opened contact of actuating relay is in closed state, movement
Circuit power-off.Faulty action preventing circuit further includes the lead for connecting with breaker, and breaker is unbalanced three-phase lines breaker.
In normal operation of circuit breaker, auxiliary switch for circuit breaker normally closed contact, that is, above-mentioned third switching group three of action circuit
Phase auxiliary switch normally closed contact is in an off state, even if accidentally touching or maloperation the normally opened of the actuating relay of action circuit connects
Point, action circuit will not be connected, and the malfunction of ontology unbalanced three-phase lines relay can be effectively prevented.
In one embodiment, as Fig. 3 structure for showing a kind of faulty action preventing circuit of breaker unbalanced three-phase lines is shown
Be intended to ,+KM and ﹣ KM shown in Fig. 3 is respectively the positive supply and negative supply in faulty action preventing circuit, respectively with start loop, delay
Circuit and action circuit connection, S1LA, S1LB and S1LC that start loop is connected in parallel are respectively that above-mentioned second group of three-phase is auxiliary
Help switch normally closed contact the A phase normally closed contact, B phase normally closed contact and the C phase normally closed contact that are connected in parallel, S1LA ', S1LB ' and
A phase normal opened contact, B phase normal opened contact and the C phase that S1LC ' respectively above-mentioned three-phase auxiliary switch normal opened contact is connected in parallel are normally opened
Contact, the K16 of start loop are the above-mentioned time relay, and the normal opened contact of timing circuit K16 is the above-mentioned time relay
Normal opened contact, the K61 of timing circuit is above-mentioned actuating relay, and the normal opened contact of action circuit K61 is above-mentioned movement
The normal opened contact of relay, the Y3L of action circuit are above-mentioned breaking coil, and S1LA ', S1LB ' and the S1LC ' of action circuit are i.e.
The A phase normally closed contact that is connected in parallel for above-mentioned first group of three-phase auxiliary switch normally closed contact, B phase normally closed contact and C phase is normally closed connects
Point, first group of three-phase auxiliary switch normally closed contact and second group of three-phase auxiliary switch normally closed contact are different contact.In Fig. 3
Coincidence refer to normal operation of circuit breaker be closed when, auxiliary switch S1LA, S1LB and S1LC are respectively positioned on closed state, and quartile is
When referring to that breaker non-normal working disconnects, auxiliary switch S1LA ', S1LB ' and S1LC ' are respectively positioned on closed state.
By auxiliary switch for circuit breaker normally closed contact, that is, above-mentioned first group of three-phase auxiliary switch normally closed contact, tripping has been isolated
The positive supply of action circuit, can be effectively prevented the malfunction of ontology unbalanced three-phase lines relay where coil.Connect in breaker
When the external equipment connect operates normally, breaker shakes in coincidence state, mechanism or accidentally touches ontology unbalanced three-phase lines relay, make
The normal opened contact of the unbalanced three-phase lines time relay or actuating relay excitation or time relay closure and actuating relay
Normal opened contact closure, will not all cause breaker malfunction.When non-three phase failure occurs for breaker, ontology unbalanced three-phase lines are disconnected
The trip(ping) circuit of road device, that is, above-mentioned action circuit is correct to trip by disconnecting the conducting of three-phase auxiliary switch normally closed contact.It is above-mentioned anti-
Malfunction circuit is simple and reliable, without parasitic loop, will not bring new defect.
In conclusion the faulty action preventing circuit of above-mentioned breaker unbalanced three-phase lines provided by the embodiment of the utility model, dynamic
Breaker three-phase auxiliary switch normally closed contact is increased as circuit, prevents from malfunctioning, improves the reliability of circuit, therefore can make
The faulty action preventing operation of breaker unbalanced three-phase lines reaches preferable effect.
The faulty action preventing circuit of the breaker unbalanced three-phase lines, the utility model embodiment also mention based on the above embodiment
The faulty action preventing system for having supplied a kind of breaker unbalanced three-phase lines, shows one kind provided by the embodiment of the utility model referring to fig. 4
The structural schematic diagram of the faulty action preventing system of breaker unbalanced three-phase lines, connect including breaker 100, with breaker as above-mentioned
Faulty action preventing circuit 200 further includes the external equipment 300 with faulty action preventing circuit connection.
It should be appreciated that Fig. 4 is only a kind of structural schematic diagram of the faulty action preventing system of breaker unbalanced three-phase lines, rather than
The exclusive architecture of the faulty action preventing system of breaker unbalanced three-phase lines in actual use, can be in addition to structure shown in Fig. 4
It including other function structure, is specifically subject to and actually uses situation, the utility model embodiment is not limited this.
In conclusion the utility model embodiment provides a kind of faulty action preventing system of breaker unbalanced three-phase lines, including
Start loop, timing circuit and the action circuit being connected in parallel, start loop include the time relay, and timing circuit includes successively
The normal opened contact and actuating relay of the time relay of connection, action circuit include that second switch group three-phase auxiliary switch is normally closed
Contact, start loop make breaker access performance loop in breaker electrifying, and timing circuit is in timing in the time relay
After state and excitation, the normal opened contact of the timing closing time relay, action circuit is powered after actuating relay excitation, so that
Circuit breaker trip realizes the faulty action preventing operation of breaker unbalanced three-phase lines.Due to the breaker unbalanced three-phase lines of the utility model
Faulty action preventing circuit, increase breaker three-phase auxiliary switch normally closed contact in action circuit, prevent from malfunctioning, improve circuit
Reliability, therefore the faulty action preventing of breaker unbalanced three-phase lines can be made to operate and reach preferable effect.
In addition, in the description of the utility model embodiment unless specifically defined or limited otherwise, term " installation ",
" connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally connect
It connects；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, can also indirectly connected through an intermediary, it can
To be the connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood with concrete condition
Concrete meaning in the present invention.
In the description of the present invention, it should be noted that term " on ", "lower", "inner", "outside", " side ", "bottom" etc.
The orientation or positional relationship of instruction is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description the utility model
It is described with simplifying, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation structure
It makes and operates, therefore should not be understood as limiting the present invention.In addition, term " first ", " second ", " third " are only used for
Purpose is described, relative importance is not understood to indicate or imply.
Finally, it should be noted that embodiment described above, only specific embodiment of the present utility model, to illustrate this
The technical solution of utility model, rather than its limitations, the protection scope of the utility model is not limited thereto, although referring to aforementioned
The utility model is described in detail in embodiment, those skilled in the art should understand that: it is any to be familiar with this skill
The technical staff in art field within the technical scope disclosed by the utility model, still can be to skill documented by previous embodiment
Art scheme modify or can readily occur in variation or equivalent replacement of some of the technical features；And these modifications,
Variation or replacement, the spirit and model of the utility model embodiment technical solution that it does not separate the essence of the corresponding technical solution
It encloses, should be covered within the scope of the utility model.Therefore, the protection scope of the utility model is answered described is wanted with right
Subject to the protection scope asked.
Claims (10)
1. a kind of faulty action preventing circuit of breaker unbalanced three-phase lines characterized by comprising the start loop that is connected in parallel prolongs
Shi Huilu and action circuit；Wherein, the start loop includes the time relay；The timing circuit includes sequentially connected institute
State the normal opened contact and actuating relay of the time relay；The action circuit, which includes that first group of three-phase auxiliary switch is normally closed, to be connect
Point；
The start loop is used to be powered when open-phase operation occurs for the breaker；The time relay is used for described
Start loop starts timing when being powered；
The timing circuit is used for the time relay described in timing closing after the time relay is in time status and excitation
The normal opened contact of device；The actuating relay is used for the excitation after timing circuit energization, controls the actuating relay
Normal opened contact closure；
The action circuit after the actuating relay excitation for being powered, so that breaking coil is attracted, circuit breaker trip is real
The faulty action preventing operation of existing breaker unbalanced three-phase lines.
2. faulty action preventing circuit according to claim 1, which is characterized in that the start loop includes and the time relay
The first switch group and second switch group that device is connected in series；
The first switch group in the normal operation of circuit breaker for being closed；
The second switch group in the normal operation of circuit breaker for disconnecting.
3. faulty action preventing circuit according to claim 2, which is characterized in that the first switch group includes three-phase auxiliary switch
Normal opened contact, the three-phase auxiliary switch normal opened contact include that the A phase normal opened contact, B phase normal opened contact and the C phase that are connected in parallel are normal
Open contact.
4. faulty action preventing circuit according to claim 2, which is characterized in that the second switch group includes that second group of three-phase is auxiliary
Help switch normally closed contact, second group of three-phase auxiliary switch normally closed contact includes that the A phase normally closed contact being connected in parallel, B phase are normal
Close contact and C phase normally closed contact.
5. faulty action preventing circuit according to claim 1, which is characterized in that the action circuit further includes and described first group
The normal opened contact and breaking coil for the actuating relay that three-phase auxiliary switch normally closed contact is connected in series；
First group of three-phase auxiliary switch normally closed contact in the normal operation of circuit breaker for disconnecting；
The normal opened contact of the actuating relay after the actuating relay excitation for being closed；
When the breaking coil is used for at least phase disconnection in the breaker three-phase, and in the normal of the actuating relay
It is powered after opening junction closure, so that the circuit breaker trip.
6. faulty action preventing circuit according to claim 1, which is characterized in that the faulty action preventing circuit passes through power supply power supply, institute
Start loop, the timing circuit and the action circuit is stated to be both connected between the positive and negative anodes of the power supply.
7. faulty action preventing circuit according to claim 6, which is characterized in that when the normal operation of circuit breaker, the movement
First group of three-phase auxiliary switch normally closed contact in circuit is in an off state, and the power supply is isolated；
If first group of three-phase auxiliary switch normally closed contact is in an off state and the normal opened contact of the actuating relay
In closed state, the action circuit power-off.
8. faulty action preventing circuit according to claim 1, which is characterized in that the faulty action preventing circuit further include for it is described
The lead of breaker connection.
9. faulty action preventing circuit according to claim 8, which is characterized in that the breaker is unbalanced three-phase lines breaker.
10. a kind of faulty action preventing system of breaker unbalanced three-phase lines, which is characterized in that connect including breaker, with the breaker
Connect such as the described in any item faulty action preventing circuits of claim 1-9, further include the external equipment with the faulty action preventing circuit connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822208523.1U CN209375124U (en) | 2018-12-26 | 2018-12-26 | The faulty action preventing circuit and system of breaker unbalanced three-phase lines |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822208523.1U CN209375124U (en) | 2018-12-26 | 2018-12-26 | The faulty action preventing circuit and system of breaker unbalanced three-phase lines |
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| Publication Number | Publication Date |
|---|---|
| CN209375124U true CN209375124U (en) | 2019-09-10 |
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| CN201822208523.1U Active CN209375124U (en) | 2018-12-26 | 2018-12-26 | The faulty action preventing circuit and system of breaker unbalanced three-phase lines |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111641195A (en) * | 2020-06-10 | 2020-09-08 | 广东电网有限责任公司 | Circuit breaker body three-phase inconsistent protection misoperation prevention loop with monitoring function |
-
2018
- 2018-12-26 CN CN201822208523.1U patent/CN209375124U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111641195A (en) * | 2020-06-10 | 2020-09-08 | 广东电网有限责任公司 | Circuit breaker body three-phase inconsistent protection misoperation prevention loop with monitoring function |
| CN111641195B (en) * | 2020-06-10 | 2021-06-01 | 广东电网有限责任公司 | Circuit breaker body three-phase inconsistent protection misoperation prevention loop with monitoring function |
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