CN206041456U - Protection device of disconnected neutral conductor and scarce looks - Google Patents
Protection device of disconnected neutral conductor and scarce looks Download PDFInfo
- Publication number
- CN206041456U CN206041456U CN201620865437.6U CN201620865437U CN206041456U CN 206041456 U CN206041456 U CN 206041456U CN 201620865437 U CN201620865437 U CN 201620865437U CN 206041456 U CN206041456 U CN 206041456U
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- relay
- phase line
- neutral conductor
- work
- resistance
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- 230000007935 neutral effect Effects 0.000 title claims abstract description 30
- 239000004020 conductor Substances 0.000 title claims abstract description 29
- 230000006378 damage Effects 0.000 abstract description 3
- 208000027418 Wounds and injury Diseases 0.000 abstract 1
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 208000014674 injury Diseases 0.000 abstract 1
- 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
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- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model relates to a protection device of disconnected neutral conductor and scarce looks, include: the first relay K1 who is connected and is connected through second resistance PU1 and third phase line L3 through first resistance PU0 and neutral conductor N, the second relay K2 who is connected and is connected through third resistance PU2 and second phase line L2 through second resistance PU1 and third phase line L3, be connected, be connected the third relay K3 who just passes through third resistance PU2 and first phase line L1 and be connected through third resistance PU2 and second phase line L2 through second resistance PU1 and third phase line L3, the residual current circuit breaker who is connected with first phase line L1, second phase line L2, third phase line L3 and neutral conductor N, be equipped with third relay K3's third node K3 on residual current circuit breaker's the trial jump return circuit 1, be equipped with first relay K1's first node K1 on the circuit that third relay K3 and first phase line L1 are connected 1 and the second node K2 of second relay 1. This scheme can effectually prevent that electrical apparatus damages and the injury of the person because the scarce coupling of neutral conductor broken string is built up.
Description
【Technical field】
This utility model is related to power supply, more particularly to the protection device 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, when adopting TT systems in addition to step down side neutral-point solid ground, the neutral conductor
Must not be grounded again.If so broken neutral line can make the neutral conductor become tandem conductor, it is series at two electrical equipments biphase
Between line, impedance is big, electrical equipment partial pressure is big, it is possible to which meeting superpressure burns household electrical appliance.
【Utility model content】
For solving foregoing problems, the utility model proposes the protection device of the disconnected neutral conductor and phase shortage, in the disconnected neutral conductor and scarce
In the case of phase, circuit protection is realized.
For reaching object defined above, this utility model is adopted the following technical scheme that：A kind of protection dress of the disconnected neutral conductor and phase shortage
Put, it is characterised in that include：First for being connected with the neutral conductor by first resistor and being connected with third phase line by second resistance
Relay；The second relay for being connected with third phase line by second resistance and being connected with the second phase line by 3rd resistor；It is logical
Cross second resistance to be connected with third phase line, be connected with the second phase line by 3rd resistor and connect with the first phase line by 3rd resistor
The 3rd relay for connecing；The residual current circuit breaker being connected with the first phase line, the second phase line, third phase line and the neutral conductor；It is described
The trial jump loop of residual current circuit breaker is provided with the 3rd node of the 3rd relay, and the 3rd relay and the first phase line connect
The circuit for connecing is provided with the secondary nodal point of the primary nodal point of the first relay and the second relay；
Normal first relay and the second relay work described in when running, the primary nodal point disconnect, and described the
Three relays do not work, and the 3rd node disconnects, and the residual current circuit breaker does not work；
When the neutral conductor disconnects, first relay does not work, the primary nodal point closure, the 3rd relay work
Make, the 3rd node closure, 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 secondary nodal point
Closure, the 3rd relay work, the 3rd node closure, the residual current circuit breaker work.
First preferred version of the present utility model is：First relay passes through the second relay and 3rd resistor and the
Two phase lines connect.
Second preferred version of the present utility model is：The primary nodal point includes the first contact chip and the second contact chip, institute
State the first contact chip and be provided with the multiple sharp cone distals projections being arranged in array, second contact chip is provided with and the plurality of point
The groove of tapered protrusion matching.
This utility model can reach following technique effect：From the disconnected neutral conductor when, phase line is not disconnected, although that is, at this moment
Without 220V voltages, but 380V voltages are really normal, therefore, as long as trying while detecting what 220V decompressions 380V voltage was present
Situation, can just judge the situation of the disconnected neutral conductor, then try to cut off circuit.Detection task is completed using three relays,
Open-phase protection, tripping operation residual current circuit breaker (having done little change, its trial jump loop is drawn into standby) or total is solved simultaneously
Lock breaking coil is completing.This programme Costco Wholesale is low, reliable and stable, and relay socket formula failure replacement is convenient, while reducing
The working strength of rural power work and effectively can prevent as broken neutral line phase shortage causes house electrical equipment to damage and a wound for the person
Evil accident.
These features of the present utility model and advantage will be detailed in following specific embodiment, accompanying drawing exposure.
【Description of the drawings】
Below in conjunction with the accompanying drawings this utility model is described further：
Circuit structure schematic diagrams of the Fig. 1 for this utility model embodiment 1.
【Specific embodiment】
The technical scheme of this utility model embodiment is explained with reference to the accompanying drawing of this utility model embodiment and
Illustrate, but following embodiments are only preferred embodiment of the present utility model, and it is not all.Based on the embodiment in embodiment,
Those skilled in the art's obtained other embodiment on the premise of creative work is not made, belongs to of the present utility model
Protection domain.
Embodiment 1.
Referring to Fig. 1, the protection device of a kind of disconnected neutral conductor and phase shortage, including：Connected with neutral conductor N by first resistor PU0
The the first relay K1 for connecing and being connected with third phase line L3 by second resistance PU1；By second resistance PU1 and third phase line L3
Connection and the second relay K2 being connected with the second phase line L2 by 3rd resistor PU2；By second resistance PU1 and third phase line
L3 connections, the 3rd for being connected with the second phase line L2 by 3rd resistor PU2 and being connected with the first phase line L1 by 3rd resistor PU2
Relay K3；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；It is remaining
The trial jump loop of tie breaker is provided with the 3rd node K3-1 of the 3rd relay K3, the 3rd relay K3 and the first phase line L1
The circuit of connection is provided with the secondary nodal point K2-1 of the primary nodal point K1-1 and the second relay of the first relay K1.
Normal first relay K1 when running and the second relay K2 normal works, primary nodal point K1-1 disconnect, the 3rd after
Electrical equipment K3 does not work, and the 3rd node K3-1 disconnects, and residual current circuit breaker does not work.
When neutral conductor N disconnects, the first relay K1 does not work, primary nodal point K1-1 closures, the 3rd relay K3 work,
3rd 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 disconnect, the second relay K2 does not work, secondary nodal point
K2-1 is closed, the 3rd relay K3 work, the 3rd node K3-1 closures, residual current circuit breaker work.
First relay K1 passes through the second relay K2 and 3rd resistor PU2 is connected with the second phase line L.
Primary nodal point K1-1 includes the first contact chip and the second contact chip, and the first contact chip is provided be arranged in array many
Individual sharp cone distal is raised, and the second contact chip is provided with the groove matched with multiple sharp cone distals projection.
The above, specific embodiment only of the present utility model, but protection domain of the present utility model do not limit to
In this, it is familiar with the those skilled in the art and should be understood that this utility model includes but is not limited to accompanying drawing and specific embodiment party above
Content described in formula.Any modification without departing from function and structure principle of the present utility model is intended to be included in claims
Scope in.
Claims (3)
1. the protection device of a kind of disconnected neutral conductor and phase shortage, it is characterised in that include：Be connected with the neutral conductor by first resistor and
The first relay being connected with third phase line by second resistance；It is connected with third phase line by second resistance and electric by the 3rd
The second relay that resistance is connected with the second phase line；Be connected with third phase line by second resistance, by 3rd resistor and the second phase
The 3rd relay that line is connected and is connected with the first phase line by 3rd resistor；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 loop of the residual current circuit breaker is provided with the 3rd of the 3rd relay the
Node, the circuit that the 3rd relay is connected with the first phase line are provided with the primary nodal point and the second relay of the first relay
Secondary nodal point；
Normal first relay and the second relay work described in when running, the primary nodal point disconnect, the described 3rd after
Electrical equipment does not work, and the 3rd node disconnects, and the residual current circuit breaker does not work；
When the neutral conductor disconnects, first relay does not work, the primary nodal point closure, the 3rd relay work,
The 3rd node closure, 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 secondary nodal point is closed
Close, the 3rd relay work, the 3rd node closure, the residual current circuit breaker work.
2. the protection device of 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 connected with the second phase line.
3. the protection device of the neutral conductor and the phase shortage of breaking according to claim 1, it is characterised in that：The primary nodal point includes
One contact chip and the second contact chip, it is raised that first contact chip is provided with the multiple sharp cone distals being arranged in array, and described second
Contact chip is provided with the groove matched with the plurality of sharp cone distal projection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620865437.6U CN206041456U (en) | 2016-08-10 | 2016-08-10 | Protection device of disconnected neutral conductor and scarce looks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620865437.6U CN206041456U (en) | 2016-08-10 | 2016-08-10 | Protection device of disconnected neutral conductor and scarce looks |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206041456U true CN206041456U (en) | 2017-03-22 |
Family
ID=58308743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620865437.6U Active CN206041456U (en) | 2016-08-10 | 2016-08-10 | Protection device of disconnected neutral conductor and scarce looks |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206041456U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2016
- 2016-08-10 CN CN201620865437.6U patent/CN206041456U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |