CN204992527U - Circuit breaker and system that opens circuit with disconnected zero -sum open -phase protection - Google Patents

Circuit breaker and system that opens circuit with disconnected zero -sum open -phase protection Download PDF

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Publication number
CN204992527U
CN204992527U CN201520617448.8U CN201520617448U CN204992527U CN 204992527 U CN204992527 U CN 204992527U CN 201520617448 U CN201520617448 U CN 201520617448U CN 204992527 U CN204992527 U CN 204992527U
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China
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phase
zero
binding post
circuit breaker
open
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CN201520617448.8U
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Inventor
曾永浩
黄劲峰
何智祥
吴树钊
陈桄耀
王强
陈谦慎
李国平
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Foshan Power Supply Bureau of Guangdong Power Grid Corp
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Foshan Power Supply Bureau of Guangdong Power Grid Corp
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Abstract

The utility model discloses a circuit breaker that has disconnected zero -sum open -phase protection, including circuit component, circuit component includes three -phase phase line entry binding post, three -phase phase line export binding post, zero line entry binding post, zero line export binding post, circuit breaker, zero disconnected detection module and lacks looks detection module, link to each other through the circuit breaker between three -phase phase line entry binding post and the three -phase phase line export binding post, three -phase phase line entry binding post is connected to zero disconnected detection module's input, and the output is connected the circuit breaker, the input of open -phase detecting module is connected three -phase phase line entry binding post and zero line entry binding post, the circuit breaker is connected to the output, the utility model also discloses a system that opens circuit of having disconnected zero -sum open -phase protection. Adopt the utility model discloses, realizing disconnected zero -sum open -phase detecting function, taking the trip protections mode, the safety of user's person and property is protected owing to the zero line broken string moves the loss that causes with lacking mutually to effective reduction.

Description

With circuit breaker and the open-circuit system of off zero and open-phase protection
Technical field
The utility model relates to low voltage electrical apparatus technology field, particularly relates to a kind of circuit breaker with off zero and open-phase protection and a kind of with off zero and open-circuit system that is open-phase protection.
Background technology
The low voltage equipment overwhelming majority adopts three phase supply.When the neutral line break of three-phase low-voltage electric power system, the current potential on user side zero line can offset, and causes large area to burn consumer electronics, causes very large economic loss to user; Phase shortage is accident common during another kind of low-voltage distribution network runs, and phase-deficient operation is comparatively large on the impact of three-phase load, and serious situation can burn power consumption equipment.Therefore, it is possible to detect neutral line break and the phase line phase shortage of low-pressure system in time, and take rational trip protection accordingly, the protection safety of personnel and the property of user are had great significance.
The low-pressure system circuit breaker of current employing is not all with off zero and pile defection function, and the existing detection scheme off zero of zero-ground voltage that utilizes needs additionally to set up protective wire, and protection can misoperation when threephase load degree of asymmetry is very large.
Summary of the invention
Technical problem to be solved in the utility model is, provides that a kind of structure is simple, accuracy is high, with the circuit breaker of off zero and open-phase protection and open-circuit system, can realize off zero and pile defection function.
In order to solve the problems of the technologies described above, the utility model provides a kind of with off zero and circuit breaker that is open-phase protection, comprise circuit element, described circuit element comprises three-phase phase line entrance binding post, three-phase phase line outlet binding post, zero line entrance binding post, zero line outlet binding post, circuit breaker, detection module off zero and open phase detection module; Described three-phase phase line entrance binding post is exported between binding post with three-phase phase line and is connected by described circuit breaker; The input of described detection module off zero connects described three-phase phase line entrance binding post and zero line entrance binding post, and output connects described circuit breaker; The input of described open phase detection module connects described three-phase phase line entrance binding post, and output connects described circuit breaker.
As the improvement of such scheme, described detection module off zero comprises three capacitors, zero sequence differential voltage relay, current transformer, current relay, logic judgment module off zero and neutral line break signal relay; Each phase line entrance binding post in described three-phase phase line entrance binding post connects the input of a capacitor respectively, output and the zero line entrance binding post of described three capacitors access logic judgment module off zero by zero sequence differential voltage relay, described zero line entrance binding post and zero line export between binding post and are provided with current transformer, described current transformer accesses logic judgment module off zero by current relay, and described logic judgment module off zero is by zero sequence disconnection signal relay access circuit breaker.
As the improvement of such scheme, described open phase detection module comprises three under-voltage replays, phase shortage logic judgment module and disconnected phase signals relay; Every two phase line entrance binding posts in described three-phase phase line entrance binding post connect the input of a under-voltage replay, the output access phase shortage logic judgment module of described three under-voltage replays, described phase shortage logic judgment module is by disconnected phase signals relay access circuit breaker.
As the improvement of such scheme, described detection module off zero also comprises the first communication module be connected with described logic judgment module off zero, for sending fault-signal to terminal.
As the improvement of such scheme, described open phase detection module also comprises the second communication module be connected with described logic judgment module off zero, for sending fault-signal to terminal.
As the improvement of such scheme, describedly also comprise patch panel with off zero and circuit breaker that is open-phase protection, described circuit element is fixed in patch panel.
As the improvement of such scheme, described patch panel is installed on the housing both sides of described circuit breaker.
Correspondingly, the utility model additionally provides a kind of with off zero and open-circuit system that is open-phase protection, comprising: distribution transformer, low-voltage distribution cabinet, circuit breaker with off zero and open-phase protection; Described distribution transformer is electrically connected with low-voltage distribution cabinet, is describedly connected with low-voltage distribution cabinet by transmission line with one end with the circuit breaker of open-phase protection off zero, other end access user end.
Implement the utility model, there is following beneficial effect:
The utility model is applied to 400V low power used system, and achieves measuring ability off zero by detection module off zero, realizes pile defection function by open phase detection module, wherein:
Detection module off zero: each the phase line entrance binding post in three-phase phase line entrance binding post connects the input of a capacitor respectively, output and the zero line entrance binding post of three capacitors access logic judgment module off zero by zero sequence differential voltage relay, simultaneously, zero line entrance binding post and zero line export between binding post and are provided with current transformer, and current transformer accesses logic judgment module off zero by current relay.During neutral line break; electric current is not had to flow through in zero line; the electric current that zero line measured by current transformer is zero; when threephase load asymmetrical voltage corresponding to three-phase phase line entrance binding post; there is overvoltage phenomenon in zero sequence differential voltage relay; if the voltage in zero sequence differential voltage relay is greater than definite value; then logic judgment module off zero judges neutral line break; start neutral line break signal relay; make circuit breaker trip; achieve measuring ability off zero, and take trip protection mode can effectively reduce because neutral line break runs the loss caused.
Open phase detection module: the every two phase line entrance binding posts in three-phase phase line entrance binding post connect the input of a under-voltage replay, the output access phase shortage logic judgment module of three under-voltage replays.During phase-deficient operation; the voltage of the phase line relevant with broken string reduces; when the action simultaneously of appearance two under-voltage replays; then phase shortage logic judgment module judges phase line phase shortage, starts disconnected phase signals relay, makes circuit breaker trip; thus realize pile defection function; take trip protection mode, the effective loss reduced because phase-deficient operation causes, can the power consumption equipment of available protecting user side be without prejudice.
Meanwhile, the utility model is all installed on described circuit breaker by patch panel with off zero with all circuit elements in the circuit breaker of open-phase protection, without the need to additional equipment investment, saves space, is also convenient to management, maintenance simultaneously.
In addition, the utility model carries out the transmission of signal by communication module, makes fault message can inform staff in time, investigation fault rapid flexible more.
Accompanying drawing explanation
Fig. 1 is that the utility model is with the example structure schematic diagram with the open-circuit system of open-phase protection off zero;
Fig. 2 is with the first example structure schematic diagram with the circuit breaker of open-phase protection off zero in Fig. 1;
Fig. 3 is with the second example structure schematic diagram with the circuit breaker of open-phase protection off zero in Fig. 1;
Fig. 4 is with the 3rd example structure schematic diagram with the circuit breaker of open-phase protection off zero in Fig. 1.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearly, below in conjunction with accompanying drawing, the utility model is described in further detail.Only this statement, the utility model occurs in the text or is about to the up, down, left, right, before and after occurred, the orientation word such as inside and outside, only with accompanying drawing of the present utility model for benchmark, it is not to concrete restriction of the present utility model.
Show the utility model with the embodiment with the open-circuit system of open-phase protection off zero see Fig. 1, Fig. 1, be applied to 400V low power used system, the power consumption equipment for the protection of user side 104 is without prejudice.
The utility model comprises distribution transformer 100, low-voltage distribution cabinet 101 and with circuit breaker 102 that is off zero and open-phase protection with off zero and open-circuit system that is open-phase protection; described distribution transformer 100 is electrically connected with low-voltage distribution cabinet 101; describedly to be connected with low-voltage distribution cabinet 101 by transmission line 103 with one end with the circuit breaker 102 of open-phase protection off zero, other end access user end 104.
Off zero and phase shortage is accident common in low power used system, can cause burning of the power consumption equipment of user side 104.Existing low-pressure system circuit breaker is not all with off zero and pile defection function, and the detection scheme off zero of its zero-ground voltage utilized needs additionally to set up protective wire, and when threephase load degree of asymmetry is very large, can produce misoperation.The utility model, by with off zero and circuit breaker 102 that is open-phase protection, can detect neutral line break and the phase line phase shortage problem of low-pressure system, the property safety of available protecting personnel and user in time.
See Fig. 2; Fig. 2 shows with the first embodiment with the circuit breaker 102 of open-phase protection off zero; comprise circuit element, described circuit element comprises three-phase phase line entrance binding post 1, three-phase phase line outlet binding post 2, zero line entrance binding post 3, zero line outlet binding post 4, circuit breaker 5, detection module M off zero and open phase detection module N.
Wherein: described three-phase phase line entrance binding post 1 and three-phase phase line are exported between binding post 2 and be connected by described circuit breaker 5.
The input of described detection module M off zero connects described three-phase phase line entrance binding post 1 and zero line entrance binding post 3, and output connects described circuit breaker 5, can realize detection off zero.
The input of described open phase detection module N connects described three-phase phase line entrance binding post 1, and output connects described circuit breaker 5, can realize the pile defection to phase line.
Described detection module M off zero and open phase detection module N is separate, is independent of each other, and when arbitrary module breaks down, can keep in repair separately, flexibility is strong.
Show with the second embodiment with the circuit breaker of open-phase protection off zero see Fig. 3, Fig. 3.
Wherein, described detection module M off zero comprises three capacitors 6, zero sequence differential voltage relay 7, current transformer 8, current relay 9, logic judgment module off zero 10 and neutral line break signal relay 11.
Described zero line entrance binding post 3 and zero line export between binding post 4 and are provided with current transformer 8, and current transformer 8 is for measuring neutral line current.
Each phase line entrance binding post in described three-phase phase line entrance binding post 1 connects the input of a capacitor 6 respectively, output and the zero line entrance binding post 3 of described three capacitors 6 access logic judgment module 10 off zero by zero sequence differential voltage relay 7, described current transformer 8 accesses logic judgment module 10 off zero by current relay 9, and described logic judgment module 10 off zero accesses circuit breaker 5 by zero sequence disconnection signal relay 11.
It should be noted that, in the utility model, three capacitors 6, zero sequence differential voltage relay 7, current transformer 8, current relay 9 and logic judgment module off zero 10 form with zero-sequence current blocking function.Its protection philosophy off zero is: the zero sequence differential voltage with zero-sequence current locking is protected, wherein, and circuit breaker 5 malfunction caused with zero-sequence current blocking function can prevent three characteristics of the middle term laod unbalance degree comparatively large.
The implementation method of defencive function off zero is as follows:
During neutral line break, do not have electric current to flow through in zero line, the electric current that zero line measured by current transformer 8 is zero; Meanwhile, when threephase load asymmetrical voltage corresponding to three-phase phase line entrance binding post 1, zero sequence differential voltage relay 7 there will be overvoltage phenomenon, when the voltage in zero sequence differential voltage relay is greater than definite value, then judges neutral line break.Now, start neutral line break signal relay 11, circuit breaker 5 is tripped.
In addition, described open phase detection module N comprises three under-voltage replays 12, phase shortage logic judgment module 13 and disconnected phase signals relay 14.
Every two phase line entrance binding posts in described three-phase phase line entrance binding post 1 connect the input of a under-voltage replay 12, the output access phase shortage logic judgment module 13 of described three under-voltage replays 12, described phase shortage logic judgment module 13 accesses circuit breaker 5 by disconnected phase signals relay 14.
It should be noted that, phase shortage logic judgment module 13 is using the action simultaneously of any two under-voltage replays 12 as judging the foundation that phase line breaks.
The implementation method of default-phase protection function is as follows:
During phase-deficient operation, the voltage of the phase line relevant with broken string reduces, and when the action simultaneously of appearance two under-voltage replays 12, then judges phase line phase shortage.Now, start disconnected phase signals relay 14, circuit breaker 5 is tripped.
Further, the utility model also comprises patch panel 15, and described circuit element is fixed in patch panel 15, and meanwhile, described patch panel 15 is installed on housing 16 both sides of described circuit breaker 5.
Therefore; the neutral line break fault of the utility model for 400V low power used system and the detection of phase line phase-deficient operation; judged by logic judgment module 10 off zero and phase shortage logic judgment module 13; take trip protection mode; effectively can reduce the loss because neutral line break and phase-deficient operation cause, the safety of the protection user person and property.
See Fig. 4; Fig. 4 shows with the second embodiment with the circuit breaker of open-phase protection off zero; with the first embodiment shown in Fig. 3 unlike; in the present embodiment; described detection module M off zero also comprises the first communication module 17a be connected with described logic judgment module 19 off zero; described open phase detection module N also comprises the second communication module 17b be connected with described logic judgment module 13 off zero, and the first communication module 17a and the second communication module 17b is used for sending fault-signal to terminal.
It should be noted that, be also provided with indicator light with on the circuit breaker of off zero and open-phase protection, comprise run indicator, neutral line break indicator light and phase line disconnect lamp bright, but not as restriction.
During normal work, run indicator lights; During neutral line break, neutral line break signal relay 11 action, neutral line break indicator light is bright; During phase line broken string, the action of phase line disconnection signal relay 14, phase line disconnect lamp is bright; When fault occurs (neutral line break, phase line break), corresponding communication module (the first communication module 17a, the second communication module 17b) sends signal to terminal, notifies operations staff's abort situation.
Further, described first communication module 17a and the second communication module 17b is GPRS wireless communication module, is carried out the transmission of signal by GPRS wireless telecommunications, makes fault message can inform staff in time, investigation fault rapid flexible more, but not as restriction.
As from the foregoing, all circuit elements in the utility model are all installed on described circuit breaker 5 by patch panel 15, without the need to additional equipment investment, save space, are also convenient to management, maintenance simultaneously.Achieve off zero and pile defection function simultaneously, take trip protection mode, effectively can reduce the loss because neutral line break and phase-deficient operation cause, the safety of the protection user person and property.
The above is preferred implementation of the present utility model; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the utility model principle; can also make some improvements and modifications, these improvements and modifications are also considered as protection range of the present utility model.

Claims (8)

1. one kind with off zero and circuit breaker that is open-phase protection, it is characterized in that, comprise circuit element, described circuit element comprises three-phase phase line entrance binding post, three-phase phase line outlet binding post, zero line entrance binding post, zero line outlet binding post, circuit breaker, detection module off zero and open phase detection module;
Described three-phase phase line entrance binding post is exported between binding post with three-phase phase line and is connected by described circuit breaker;
The input of described detection module off zero connects described three-phase phase line entrance binding post and zero line entrance binding post, and output connects described circuit breaker;
The input of described open phase detection module connects described three-phase phase line entrance binding post, and output connects described circuit breaker.
2. as claimed in claim 1 with off zero and circuit breaker that is open-phase protection, it is characterized in that, described detection module off zero comprises three capacitors, zero sequence differential voltage relay, current transformer, current relay, logic judgment module off zero and neutral line break signal relay;
Each phase line entrance binding post in described three-phase phase line entrance binding post connects the input of a capacitor respectively, output and the zero line entrance binding post of described three capacitors access logic judgment module off zero by zero sequence differential voltage relay, described zero line entrance binding post and zero line export between binding post and are provided with current transformer, described current transformer accesses logic judgment module off zero by current relay, and described logic judgment module off zero is by zero sequence disconnection signal relay access circuit breaker.
3., as claimed in claim 1 with off zero and circuit breaker that is open-phase protection, it is characterized in that, described open phase detection module comprises three under-voltage replays, phase shortage logic judgment module and disconnected phase signals relay;
Every two phase line entrance binding posts in described three-phase phase line entrance binding post connect the input of a under-voltage replay, the output access phase shortage logic judgment module of described three under-voltage replays, described phase shortage logic judgment module is by disconnected phase signals relay access circuit breaker.
4. as claimed in claim 2 with off zero and circuit breaker that is open-phase protection, it is characterized in that, described detection module off zero also comprises the first communication module be connected with described logic judgment module off zero, for sending fault-signal to terminal.
5. as claimed in claim 3 with off zero and circuit breaker that is open-phase protection, it is characterized in that, described open phase detection module also comprises the second communication module be connected with described logic judgment module off zero, for sending fault-signal to terminal.
6., as claimed in claim 1 with off zero and circuit breaker that is open-phase protection, it is characterized in that, also comprise patch panel, described circuit element is fixed in patch panel.
7., as claimed in claim 6 with off zero and circuit breaker that is open-phase protection, it is characterized in that, described patch panel is installed on the housing both sides of described circuit breaker.
8., with an off zero and open-circuit system that is open-phase protection, it is characterized in that, comprising:
Distribution transformer;
Low-voltage distribution cabinet;
As described in any one of claim 1 ~ 7 with off zero and circuit breaker that is open-phase protection;
Described distribution transformer is electrically connected with low-voltage distribution cabinet, is describedly connected with low-voltage distribution cabinet by transmission line with one end with the circuit breaker of open-phase protection off zero, other end access user end.
CN201520617448.8U 2015-08-17 2015-08-17 Circuit breaker and system that opens circuit with disconnected zero -sum open -phase protection Active CN204992527U (en)

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CN201520617448.8U CN204992527U (en) 2015-08-17 2015-08-17 Circuit breaker and system that opens circuit with disconnected zero -sum open -phase protection

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Application Number Priority Date Filing Date Title
CN201520617448.8U CN204992527U (en) 2015-08-17 2015-08-17 Circuit breaker and system that opens circuit with disconnected zero -sum open -phase protection

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CN204992527U true CN204992527U (en) 2016-01-20

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105811368A (en) * 2016-04-18 2016-07-27 广东电网有限责任公司佛山供电局 Self-adaptive zero line broken protection device and system
CN106229936A (en) * 2016-08-10 2016-12-14 国网浙江瑞安市供电有限责任公司 The disconnected neutral conductor and the protection device of phase shortage

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105811368A (en) * 2016-04-18 2016-07-27 广东电网有限责任公司佛山供电局 Self-adaptive zero line broken protection device and system
CN105811368B (en) * 2016-04-18 2018-04-17 广东电网有限责任公司佛山供电局 Adaptivity zero line break protection device and system
CN106229936A (en) * 2016-08-10 2016-12-14 国网浙江瑞安市供电有限责任公司 The disconnected neutral conductor and the protection device of phase shortage

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