CN106229936B - The protective device of the disconnected neutral conductor and phase shortage - Google Patents
The protective device of the disconnected neutral conductor and phase shortage Download PDFInfo
- Publication number
- CN106229936B CN106229936B CN201610654366.XA CN201610654366A CN106229936B CN 106229936 B CN106229936 B CN 106229936B CN 201610654366 A CN201610654366 A CN 201610654366A CN 106229936 B CN106229936 B CN 106229936B
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- relay
- phase line
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- work
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- 230000007935 neutral effect Effects 0.000 title claims abstract description 30
- 239000004020 conductor Substances 0.000 title claims abstract description 28
- 230000001681 protective effect Effects 0.000 title claims abstract description 10
- 230000005611 electricity Effects 0.000 claims 1
- 230000006378 damage Effects 0.000 abstract description 4
- 208000027418 Wounds and injury Diseases 0.000 abstract description 2
- 208000014674 injury Diseases 0.000 abstract description 2
- 230000006837 decompression Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/24—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage
- H02H3/253—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage for multiphase applications, e.g. phase interruption
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The present invention relates to a kind of disconnected neutral conductor and the protective device of phase shortage, including：The the first relay K1 for being connect with neutral conductor N by first resistor PU0 and being connect by second resistance PU1 with third phase line L3；The the second relay K2 for being connect with third phase line L3 by second resistance PU1 and being connect by 3rd resistor PU2 with the second phase line L2；The third relay K3 for connecting with third phase line L3, being connect by 3rd resistor PU2 with the second phase line L2 and being connect by 3rd resistor PU2 with the first phase line L1 by second resistance PU1；The residual current circuit breaker being connect with the first phase line L1, the second phase line L2, third phase line L3 and neutral conductor N；The second node K2 1 of first node K1 1 and second relay of the circuit equipped with the first relay K1 that third node K3 1, third relay K3 and first phase line L1 of the trial jump circuit of residual current circuit breaker equipped with third relay K3 are connect.This programme can effectively prevent since broken neutral line phase shortage causes electric appliance damage and an injury for the person.
Description
【Technical field】
The present invention relates to power supply more particularly to the protective devices of a kind of disconnected neutral conductor and phase shortage.
【Background technology】
In recent years, according to《Rural area low-voltage power technical specification》Regulation, TT systems must implement residual current protecting, and
It is required that the neutral conductor is unable to multiple grounding, for this purpose, using during TT systems in addition to step down side neutral-point solid ground, the neutral conductor
It must not be grounded again.In this way if broken neutral line can make the neutral conductor become tandem conductor, two electrical equipments is made to be series at two-phase
Between line, impedance is big, electrical equipment partial pressure is big, it is possible to which meeting superpressure burns household electrical appliance.
【Invention content】
To solve foregoing problems, the present invention proposes the protective device of the disconnected neutral conductor and phase shortage, in the disconnected neutral conductor and phase shortage
In the case of, realize circuit protection.
To reach foregoing purpose, the present invention adopts the following technical scheme that：A kind of protective device of the disconnected neutral conductor and phase shortage,
It is characterized in that, including：The first relay for being connect with the neutral conductor by first resistor and being connect by second resistance with third phase line
Device；The second relay for being connect with third phase line by second resistance and being connect by 3rd resistor with the second phase line；Pass through
What two resistance connect with third phase line, and were connect by 3rd resistor with the second phase line and connect by 3rd resistor with the first phase line
Third relay；The residual current circuit breaker being connect with the first phase line, the second phase line, third phase line and the neutral conductor；The residue
The trial jump circuit of tie breaker is equipped with the third node of third relay, what the third relay was connect with the first phase line
Circuit is equipped with the first node of the first relay and the second node of the second relay；
First relay described in during normal operation and the second relay work, the first node disconnect, and described the
Three relays do not work, and the third node disconnects, and the residual current circuit breaker does not work；
When the neutral conductor disconnects, first relay does not work, and the first node is closed, the third relay work
Make, the third node is closed, the residual current circuit breaker work；
When the first phase line, the second phase line or third phase line disconnect, second relay does not work, the second node
It is closed, the third relay work, the third node is closed, the residual current circuit breaker work.
The present invention the first preferred embodiment be：First relay passes through the second relay and 3rd resistor and the second phase
Line connects.
The present invention the second preferred embodiment be：The first node includes the first contact chip and the second contact chip, and described the
One contact chip is equipped with the multiple sharp cone distals protrusion being arranged in array, and second contact chip is equipped with and the multiple sharp cone distal
The matched groove of protrusion.
The present invention can reach following technique effect：From the disconnected neutral conductor when, phase line is there is no disconnected, although that is, at this moment not having
220V voltages, but 380V voltages are really normal, therefore, as long as trying to detect feelings existing for 220V decompression 380V voltages simultaneously
Condition can just judge the situation of the disconnected neutral conductor, then try to cut off circuit.Detection task is completed using three relays, together
When solve open-phase protection, tripping residual current circuit breaker (having done small change, its trial jump circuit is drawn spare) or total lock
Breaking coil is completed.This programme Costco Wholesale is low, reliable and stable, and relay socket formula failure replacement is convenient, while reduces agriculture
It the working strength of electrician and can effectively prevent since broken neutral line phase shortage causes the damage of electric appliance and an injury for the person
Thing
The present invention these features and advantages will be detailed in following specific embodiment, attached drawing exposure.
【Description of the drawings】
The present invention is described further below in conjunction with the accompanying drawings：
Fig. 1 is the circuit structure schematic diagram of the embodiment of the present invention 1.
【Specific embodiment】
The technical solution of the embodiment of the present invention is explained and illustrated with reference to the attached drawing of the embodiment of the present invention, but under
It states embodiment to be merely a preferred embodiment of the present invention, and not all.Based on the embodiment in embodiment, those skilled in the art
Other embodiment is obtained under the premise of creative work is not made, belongs to protection scope of the present invention.
Embodiment 1.
Referring to Fig. 1, the protective device of a kind of disconnected neutral conductor and phase shortage, including：Connected by first resistor PU0 and neutral conductor N
The the first relay K1 for connecing and being connect by second resistance PU1 with third phase line L3；Pass through second resistance PU1 and third phase line L3
Connection and the second relay K2 being connect by 3rd resistor PU2 with the second phase line L2；Pass through second resistance PU1 and third phase line
L3 connections, the third for being connect with the second phase line L2 by 3rd resistor PU2 and being connect by 3rd resistor PU2 with the first phase line L1
Relay K3；The residual current circuit breaker being connect with the first phase line L1, the second phase line L2, third phase line L3 and neutral conductor N；It is remaining
The trial jump circuit of tie breaker is equipped with third the node K3-1, third relay K3 and the first phase line L1 of third relay K3
The second node K2-1 of first node K1-1 and second relay of the circuit of connection equipped with the first relay K1.
During normal operation the first relay K1 and the second relay K2 normal work, first node K1-1 disconnect, third after
Electric appliance K3 does not work, and third node K3-1 is disconnected, and residual current circuit breaker does not work.
When neutral conductor N is disconnected, the first relay K1 does not work, and first node K1-1 is closed, third relay K3 work,
Third node K3-1 is closed, residual current circuit breaker work.
When the first phase line L1, the second phase line L2 or third phase line L3 are disconnected, the second relay K2 does not work, second node
K2-1 is closed, and third relay K3 work, third node K3-1 is closed, residual current circuit breaker work.
First relay K1 is connect by the second relay K2 and 3rd resistor PU2 with the second phase line L.
First node K1-1 includes the first contact chip and the second contact chip, and the first contact chip is more equipped with being arranged in array
A sharp cone distal protrusion, the second contact chip are equipped with and the matched groove of multiple sharp cone distals protrusion.
The above description is merely a specific embodiment, but protection scope of the present invention is not limited thereto, and is familiar with
The those skilled in the art should be understood that the present invention includes but not limited to attached drawing and interior described in specific embodiment above
Hold.The modification of any function and structure principle without departing from the present invention is intended to be included in the range of claims.
Claims (3)
1. a kind of protective device of disconnected neutral conductor and phase shortage, which is characterized in that including：Connect by first resistor with the neutral conductor and
The first relay being connect by second resistance with third phase line；It is connect by second resistance with third phase line and by third electricity
Hinder the second relay being connect with the second phase line；It is connect by second resistance with third phase line, by 3rd resistor and the second phase
The third relay that line is connected and connect by the 4th resistance with the first phase line；With the first phase line, the second phase line, third phase line and
The residual current circuit breaker of neutral conductor connection；The trial jump circuit of the residual current circuit breaker is equipped with the third of third relay
Node, the circuit that the third relay is connect with the first phase line are equipped with the first node and the second relay of the first relay
Second node；
First relay described in during normal operation and the second relay work, the first node disconnect, the third after
Electric appliance does not work, and the third node disconnects, and the residual current circuit breaker does not work；
When the neutral conductor disconnects, first relay does not work, and the first node is closed, the third relay work,
The third node is closed, the residual current circuit breaker work；
When the first phase line, the second phase line or third phase line disconnect, second relay does not work, and the second node closes
It closes, the third relay work, the third node is closed, the residual current circuit breaker work.
2. the protective device for the neutral conductor and the phase shortage of breaking according to claim 1, it is characterised in that：First relay passes through
Second relay and 3rd resistor are connect with the second phase line.
3. the protective device for the neutral conductor and the phase shortage of breaking according to claim 1, it is characterised in that：The first node includes the
One contact chip and the second contact chip, first contact chip is raised equipped with the multiple sharp cone distals being arranged in array, and described second
Contact chip is equipped with and the matched groove of the multiple sharp cone distal protrusion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610654366.XA CN106229936B (en) | 2016-08-10 | 2016-08-10 | The protective device of the disconnected neutral conductor and phase shortage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610654366.XA CN106229936B (en) | 2016-08-10 | 2016-08-10 | The protective device of the disconnected neutral conductor and phase shortage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106229936A CN106229936A (en) | 2016-12-14 |
| CN106229936B true CN106229936B (en) | 2018-07-06 |
Family
ID=57547096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610654366.XA Active CN106229936B (en) | 2016-08-10 | 2016-08-10 | The protective device of the disconnected neutral conductor and phase shortage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106229936B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108281939B (en) * | 2018-03-20 | 2024-02-09 | 四川电之盾安全技术有限公司 | Neutral line breakage protection device with high safety for three-phase electricity |
| KR102349343B1 (en) * | 2021-08-02 | 2022-01-10 | 대한기전 주식회사 | Switchboard having three phases open and netural line protecting function |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104426128B (en) * | 2013-09-05 | 2018-01-19 | 西门子公司 | Broken neutral line detects circuit and corresponding residual current circuit breaker |
| CN204464944U (en) * | 2015-02-06 | 2015-07-08 | 广东南冠电气有限公司 | A kind of circuit breaker with default-phase protection function off zero |
| CN204992527U (en) * | 2015-08-17 | 2016-01-20 | 广东电网有限责任公司佛山供电局 | Circuit breaker and system that opens circuit with disconnected zero -sum open -phase protection |
| CN206041456U (en) * | 2016-08-10 | 2017-03-22 | 国网浙江瑞安市供电有限责任公司 | Protection device of disconnected neutral conductor and scarce looks |
-
2016
- 2016-08-10 CN CN201610654366.XA patent/CN106229936B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN106229936A (en) | 2016-12-14 |
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