CN106229936A - The disconnected neutral conductor and the protection device of phase shortage - Google Patents
The disconnected neutral conductor and the protection device of phase shortage Download PDFInfo
- Publication number
- CN106229936A CN106229936A CN201610654366.XA CN201610654366A CN106229936A CN 106229936 A CN106229936 A CN 106229936A CN 201610654366 A CN201610654366 A CN 201610654366A CN 106229936 A CN106229936 A CN 106229936A
- Authority
- CN
- China
- Prior art keywords
- relay
- phase line
- resistance
- neutral conductor
- phase
- 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
-
- 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 protection device of phase shortage, including: the first relay K 1 being connected with neutral conductor N by the first resistance PU0 and being connected by the second resistance PU1 and third phase line L3；The second relay K 2 being connected with third phase line L3 by the second resistance PU1 and connected by the 3rd resistance PU2 and the second phase line L2；The 3rd relay K 3 being connected with third phase line L3 by the second resistance PU1, being connected by the 3rd resistance PU2 and the second phase line L2 and connected by the 3rd resistance PU2 and the first phase line L1；The residual current circuit breaker being connected with the first phase line L1, the second phase line L2, third phase line L3 and neutral conductor N；The trial jump loop of residual current circuit breaker is provided with the 3rd node K3 1 of the 3rd relay K 3, and the circuit that the 3rd relay K 3 is connected with the first phase line L1 is provided with the primary nodal point K1 1 and the secondary nodal point K2 1 of the second relay of the first relay K 1.This programme can effectively prevent owing to broken neutral line phase shortage causes an electrical equipment to damage and the injury of the person.
Description
[technical field]
The present invention relates to power supply, particularly relate to a kind of disconnected neutral conductor and the protection device of phase shortage.
[background technology]
In recent years, specifying according to " rural area low-voltage power technical specification ", TT system must implement residual current protecting, and
Require the neutral conductor can not multiple grounding, to this end, use TT system time in addition to step down side neutral-point solid ground, the neutral conductor
Must not ground connection again.If so broken neutral line can make the neutral conductor become tandem conductor, two electrical equipments are made to be series at biphase
Between line, impedance is big, electrical equipment dividing potential drop is big, it is possible to superpressure can burn household electrical appliance.
[summary of the invention]
For solving foregoing problems, the present invention proposes the disconnected neutral conductor and the protection device of phase shortage, in the disconnected neutral conductor and phase shortage
In the case of, it is achieved circuit protection.
For reaching object defined above, the present invention adopts the following technical scheme that a kind of disconnected neutral conductor and the protection device of phase shortage, its
It is characterised by, including: the first relay being connected with the neutral conductor by the first resistance and being connected with third phase line by the second resistance
Device；The second relay being connected with third phase line by the second resistance and connected by the 3rd resistance and the second phase line；By
Two resistance are connected with third phase line, are connected by the 3rd resistance and the second phase line and are connected by the 3rd resistance and the first phase line
3rd relay；The residual current circuit breaker being connected with the first phase line, the second phase line, third phase line and the neutral conductor；Described residue
The trial jump loop of tie breaker is provided with what the 3rd node of the 3rd relay, described 3rd relay and the first phase line connected
Circuit is provided with primary nodal point and the secondary nodal point of the second relay of the first relay；
First relay described in time properly functioning and the second relay work, described primary nodal point disconnects, and described the
Three relays do not work, and described 3rd node disconnects, and described residual current circuit breaker does not works；
When the neutral conductor disconnects, described first relay does not works, and described primary nodal point closes, described 3rd relay work
Making, described 3rd node Guan Bi, described residual current circuit breaker works；
When the first phase line, the second phase line or third phase line disconnect, described second relay does not works, described secondary nodal point
Guan Bi, described 3rd relay work, described 3rd node Guan Bi, described residual current circuit breaker works.
First preferred version of the present invention is: described first relay is by the second relay and the 3rd resistance and the second phase
Line connects.
Second preferred version of the present invention is: described primary nodal point includes the first contact chip and the second contact chip, described
It is protruding that one contact chip is provided with the multiple sharp cone distal being arranged in array, and described second contact chip is provided with and the plurality of sharp cone distal
The groove of protruding coupling.
The present invention can reach following technique effect: when the disconnected neutral conductor, and phase line is the most disconnected, although the most at this moment not having
220V voltage, but 380V voltage is really normal, therefore, as long as manage to detect the feelings that 220V decompression 380V voltage exists simultaneously
Condition, just can judge the situation of the disconnected neutral conductor, then manages to cut off circuit.Three relays are used to complete Detection task, with
Time solve open-phase protection, tripping operation residual current circuit breaker (having done little change, draw standby by its trial jump loop) or total lock
Breaking coil completes.This programme Costco Wholesale is low, reliable and stable, and relay socket formula failure replacement is convenient, reduces agriculture simultaneously
The working strength of electrician and can effectively prevent owing to broken neutral line phase shortage causes an electrical equipment to damage and an injury for the person
Thing
These features of the present invention and advantage will be detailed in following detailed description of the invention, accompanying drawing exposure.
[accompanying drawing explanation]
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.
[detailed description of the invention]
The technical scheme of the embodiment of the present invention is explained and illustrated by the accompanying drawing below in conjunction with the embodiment of the present invention, but under
State embodiment and be only the preferred embodiments of the present invention, and not all.Based on the embodiment in embodiment, those skilled in the art
On the premise of not making creative work, obtained other embodiments, broadly fallen into protection scope of the present invention.
Embodiment 1.
Referring to Fig. 1, a kind of disconnected neutral conductor and the protection device of phase shortage, including: by the first resistance PU0 and neutral conductor N even
The first relay K 1 connect and be connected by the second resistance PU1 and third phase line L3；By the second resistance PU1 and third phase line L3
The second relay K 2 connected and connected by the 3rd resistance PU2 and the second phase line L2；By the second resistance PU1 and third phase line
L3 is connected, is connected by the 3rd resistance PU2 and the second phase line L2 and by the 3rd resistance PU2 and the 3rd of the connection of the first phase line L1 the
Relay K 3；The residual current circuit breaker being connected with the first phase line L1, the second phase line L2, third phase line L3 and neutral conductor N；Residue
The trial jump loop of tie breaker is provided with the 3rd node K3-1 of the 3rd relay K 3, the 3rd relay K 3 and the first phase line L1
The circuit connected is provided with the primary nodal point K1-1 of the first relay K 1 and secondary nodal point K2-1 of the second relay.
Time properly functioning, the first relay K 1 and the second relay K 2 normally work, and primary nodal point K1-1 disconnects, and the 3rd continues
Electrical equipment K3 does not works, and the 3rd node K3-1 disconnects, and residual current circuit breaker does not works.
When neutral conductor N disconnects, the first relay K 1 does not works, and primary nodal point K1-1 closes, and the 3rd relay K 3 works,
3rd node K3-1 Guan Bi, residual current circuit breaker works.
When the first phase line L1, the second phase line L2 or third phase line L3 disconnect, the second relay K 2 does not works, secondary nodal point
K2-1 closes, and the 3rd relay K 3 works, and the 3rd node K3-1 Guan Bi, residual current circuit breaker works.
First relay K 1 is connected by the second relay K 2 and the 3rd resistance PU2 and the second phase line L.
Primary nodal point K1-1 includes the first contact chip and the second contact chip, the first contact chip be provided be arranged in array many
Individual sharp cone distal is protruding, and the second contact chip is provided with the groove mated with multiple sharp cone distal projections.
The above, the only detailed description of the invention of the present invention, but protection scope of the present invention is not limited thereto, and is familiar with
This those skilled in the art should be understood that the present invention includes but not limited to accompanying drawing and interior described in detailed description of the invention above
Hold.Any it is intended to be included in the scope of claims without departing from the function of the present invention and the amendment of structural principle.
Claims (3)
1. a disconnected neutral conductor and the protection device of phase shortage, it is characterised in that including: be connected with the neutral conductor by the first resistance and
The first relay being connected with third phase line by the second resistance；It is connected and by the 3rd electricity with third phase line by the second resistance
The second relay that resistance is connected with the second phase line；It is connected with third phase line by the second resistance, by the 3rd resistance and the second phase
The 3rd relay that line is connected and connected by the 3rd resistance and the first phase line；With the first phase line, the second phase line, third phase line and
The residual current circuit breaker that the neutral conductor connects；The trial jump loop of described residual current circuit breaker is provided with the 3rd of the 3rd relay the
The circuit that node, described 3rd relay and the first phase line connect is provided with primary nodal point and second relay of the first relay
Secondary nodal point；
First relay described in time properly functioning and the second relay work, described primary nodal point disconnects, and the described 3rd continues
Electrical equipment does not works, and described 3rd node disconnects, and described residual current circuit breaker does not works；
When the neutral conductor disconnects, described first relay does not works, and described primary nodal point closes, described 3rd relay work,
Described 3rd node Guan Bi, described residual current circuit breaker works；
When the first phase line, the second phase line or third phase line disconnect, described second relay does not works, and described secondary nodal point closes
Closing, described 3rd relay work, described 3rd node Guan Bi, described residual current circuit breaker works.
The protection device of the neutral conductor and the phase shortage of breaking the most according to claim 1, it is characterised in that: described first relay passes through
Second relay and the 3rd resistance and the second phase line connect.
The protection device of the neutral conductor and the phase shortage of breaking the most according to claim 1, it is characterised in that: described primary nodal point includes
One contact chip and the second contact chip, it is protruding that described first contact chip is provided with the multiple sharp cone distal being arranged in array, and described second
Contact chip is provided with the groove mated with the plurality of sharp cone distal projection.
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 true CN106229936A (en) | 2016-12-14 |
| CN106229936B 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) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108281939A (en) * | 2018-03-20 | 2018-07-13 | 四川电之盾安全技术有限公司 | Three-phase electricity high security broken neutral line protective device |
| KR102349343B1 (en) * | 2021-08-02 | 2022-01-10 | 대한기전 주식회사 | Switchboard having three phases open and netural line protecting function |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2518733A (en) * | 2013-09-05 | 2015-04-01 | Siemens Ag | Neutral line breakage detection circuit, method 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
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2518733A (en) * | 2013-09-05 | 2015-04-01 | Siemens Ag | Neutral line breakage detection circuit, method 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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108281939A (en) * | 2018-03-20 | 2018-07-13 | 四川电之盾安全技术有限公司 | Three-phase electricity high security broken neutral line protective device |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106229936B (en) | 2018-07-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105122408A (en) | Circuit interruption device | |
| CN202260378U (en) | Leakage protector | |
| CN105720602A (en) | Photovoltaic grid-connected power generating energy storage inverter grid-connected-off-grid system and operation device thereof | |
| CN103839710B (en) | A kind of mixed type dc circuit breaker | |
| CN205509468U (en) | Collection flow box protection device | |
| CN104505667A (en) | Voltage conversion type leakage protection plug | |
| CN103683225A (en) | Ground fault protection method of nuclear plant low-voltage power distribution system in all power supply ranges | |
| CN106229936A (en) | The disconnected neutral conductor and the protection device of phase shortage | |
| CN105259516B (en) | A kind of off-line UPS input switch abnormal detector | |
| CN206148928U (en) | Power transformer's zero -sequence protection circuit | |
| CN101877477A (en) | Leakage protection switch for preventing three-phase power circuit from generating high voltage | |
| CN104600663A (en) | Voltage-current hybrid leakage protection plug | |
| CN104810792A (en) | Electric leakage protection device and control method thereof | |
| CN206041456U (en) | Protection device of disconnected neutral conductor and scarce looks | |
| CN101877476A (en) | Protector for preventing three-phase power circuit from generating high voltage | |
| CN105929744A (en) | Startup and shutdown circuit and household appliance | |
| CN203166469U (en) | Phase sequence protective relay | |
| CN105006708A (en) | Protection-mode-convertible electric leakage protection plug | |
| CN206452094U (en) | Cross undervoltage intelligence from restoring to throne protection device | |
| CN202134886U (en) | Residual current protection apparatus and apparatus possessing residual current protection function | |
| CN201118194Y (en) | Energy supply protector | |
| CN205029315U (en) | Direct -current overvoltage protection circuit | |
| CN204927704U (en) | Convertible ground wire protected mode's leakage protection plug | |
| CN105048421B (en) | A kind of switch contact adhesion fault protection circuit | |
| CN104882867A (en) | Power distribution network self-healing control method and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | 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 |