CN205945013U - Distribution network zero line fault protection ware based on zero line voltage -to -ground - Google Patents
Distribution network zero line fault protection ware based on zero line voltage -to -ground Download PDFInfo
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- CN205945013U CN205945013U CN201620906525.6U CN201620906525U CN205945013U CN 205945013 U CN205945013 U CN 205945013U CN 201620906525 U CN201620906525 U CN 201620906525U CN 205945013 U CN205945013 U CN 205945013U
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- distribution network
- zero line
- voltage relay
- voltage
- relay
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- 230000009471 action Effects 0.000 claims abstract description 7
- 230000001012 protector Effects 0.000 claims description 14
- 230000005611 electricity Effects 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 2
- 230000007257 malfunction Effects 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model relates to a distribution network zero line fault protection ware based on zero line voltage -to -ground, the distribution network is the three -sphase four -wire system power supply, including set up in the air switch of distribution network inlet wire end department, with a release that the air switch cooperation is connected and a voltage relay who is used for controlling the release action, still include 1 the 2nd voltage relay, the 2nd voltage relay one end is connected with the zero line, other end ground connection, and the 2nd voltage relay's normally open switch with first relay electricity even. The utility model has the advantages of during to the distribution network zero line broken string that adopts the three -sphase four -wire system power supply or contact failure, through the 2nd voltage relay and a voltage relay interoperation, can control release tripping off inlet wire air switch rapidly, reach the excision power, the purpose of protection consumer avoids burning out subscriber equipment.
Description
Technical field
The utility model is related to the protection field of system for distribution network of power network electrical equipment, and more particularly, to one kind is based on zero line
Voltage-to-ground distribution system zero-line failure protector.
Background technology
For a long time, because of step down side, service conductor joint, electricity box aluminium row's ground connection zero line（Ground wire）Loose contact or
Break and lead to client's household electrical appliance to damage event and happen occasionally.The principles such as the air switch commonly used at present are big according to electric current
Little cutting off, but be commonly present, because when field condition is complicated, the situation that air switch cannot trip, because such event is that power supply is single
Taking the main responsibility in position, and is related to that the scope of client is larger, brings larger economic loss to client and enterprise, also easily causes
Large area client complaint and complaint, cause bad society's negative effect.
Distribution system zero-line failure protector, is a kind of device that system for distribution network of power network electrical equipment is protected.Join
Electrical network adopts three-phase four-wire power supply, when there is neutral line break fault, because threephase load is uneven, can cause partly separate
Overtension, burns out electrical equipment.Distribution system zero-line failure protector is mainly by a voltage relay and an air switch electrical apparatus release
Composition, is installed at distribution inlet wire air switch, and mains side occurs actuating of relay during neutral line break, controls electrical apparatus release tripping to enter
Line air switch, reaches excision power supply, the purpose of protection electrical equipment.
Content of the invention
The purpose of this utility model is for above weak point, there is provided a kind of power distribution network based on zero line voltage-to-ground
System zero-line failure protector, structure is simple, easy to operate, can control rapidly electrical apparatus release tripping inlet wire air switch, reaches excision electricity
Source, the purpose of protection electrical equipment, it is to avoid burn out user equipment.
The utility model solves the scheme that adopted of technical problem：A kind of power distribution network zero line based on zero line voltage-to-ground
Failure protector, described power distribution network is three-phase four-wire power supply, including the air switch being arranged at power distribution network end of incoming cables and institute
State electrical apparatus release and the first voltage relay for controlling electrical apparatus release action that air switch is connected；Also include one second electricity
Potential relay, described second voltage relay one end is connected with zero line, and the other end is grounded, and described second voltage relay
Normal open switch is electrically connected with described first relay.
Further, described second voltage relay is also powered with a time block, described first voltage relay, second
Voltage relay and time block are electrically connected with a control unit.
Further, described control unit is single-chip microcomputer.
Compared with prior art, the utility model has following beneficial effect：The power distribution network zero line event that the utility model provides
Barrier protector adopts zero line voltage-to-ground as startup power supply, will not generate heat, vibrates when normal, reliable, be difficult malfunction, sentence
Disconnected accurate；The power distribution network system zero-line failure protector that the utility model provides can set to the time excising power supply after fault,
Can adjust it is ensured that not malfunction during fault-free, not tripping when faulty as needed；Electrical apparatus release of the present utility model can be reequiped former
Have earth leakage protective air switch, can cost-effective, space, and do not affect creepage protection function.
Brief description
Below in conjunction with the accompanying drawings the utility model patent is further illustrated.
Fig. 1 is the power distribution network system zero-line failure protector circuit catenation principle figure of the utility model embodiment.
In figure：X1 is electrical apparatus release；Q1 is air switch；1ZJ is first voltage relay；2ZJ is second voltage relay.
Specific embodiment
With reference to the accompanying drawings and detailed description the utility model is further illustrated.
As shown in figure 1, a kind of power distribution network system zero-line failure protector based on zero line voltage-to-ground of the present embodiment, described join
Electrical network is three-phase four-wire power supply, connects including the air switch being arranged at power distribution network end of incoming cables and the cooperation of described air switch
The electrical apparatus release connecing and the first voltage relay for controlling electrical apparatus release action；Also include a second voltage relay, described
Two voltage relay one end are connected with zero line, the other end be grounded, and the normal open switch of described second voltage relay with described
First relay is electrically connected.
From the foregoing, the beneficial effects of the utility model are：The present invention passes through second voltage relay test zero line
Whether break down, in normal operation, zero line voltage-to-ground is close to 0V, and when user's neutral line break, zero line voltage-to-ground reaches
Second voltage relay 2ZJ working value, second voltage relay 2ZJ action, its normally opened node 2ZJ closure, thus first voltage
Relay 1ZJ reaches working value, first voltage relay 1ZJ action, and its node action drivening rod is driven, and electrical apparatus release X1 moves
Make, thus air switch Q1 tripping operation.
In the present embodiment, described second voltage relay is also powered with a time block, described first voltage relay,
Second voltage relay and time block are electrically connected with a control unit.Second voltage relay pair can be controlled by time block
The time excising power supply after fault can be set, and can adjust it is ensured that not malfunction during fault-free as needed, when faulty not
Tripping.
In the present embodiment, described control unit is single-chip microcomputer.Can be 51 single-chip microcomputers.
In sum, a kind of power distribution network system zero-line failure protector based on zero line voltage-to-ground that the utility model provides,
Structure is simple, easy to operate, can control rapidly electrical apparatus release tripping inlet wire air switch, reaches excision power supply, protects electrical equipment
Purpose, it is to avoid burn out user equipment.
Above-listed preferred embodiment, is further described to the purpose of this utility model, technical scheme and advantage,
Be should be understood that and be the foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all
Within spirit of the present utility model and principle, any modification, equivalent substitution and improvement made etc., should be included in this practicality
Within new protection domain.
Claims (3)
1. a kind of power distribution network system zero-line failure protector based on zero line voltage-to-ground, described power distribution network is three-phase four-wire power supply,
It is characterized in that：The electrical apparatus release being connected with described air switch including the air switch being arranged at power distribution network end of incoming cables
With the first voltage relay for controlling electrical apparatus release action；Also include a second voltage relay, described second voltage relay
Device one end is connected with zero line, and the other end is grounded, and the normal open switch of described second voltage relay and described first relay
It is electrically connected.
2. a kind of power distribution network system zero-line failure protector based on zero line voltage-to-ground according to claim 1, its feature exists
In：Described second voltage relay is also powered with a time block, described first voltage relay, second voltage relay and fixed
When module be electrically connected with a control unit.
3. a kind of power distribution network system zero-line failure protector based on zero line voltage-to-ground according to claim 2, its feature exists
In：Described control unit is single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620906525.6U CN205945013U (en) | 2016-08-22 | 2016-08-22 | Distribution network zero line fault protection ware based on zero line voltage -to -ground |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620906525.6U CN205945013U (en) | 2016-08-22 | 2016-08-22 | Distribution network zero line fault protection ware based on zero line voltage -to -ground |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205945013U true CN205945013U (en) | 2017-02-08 |
Family
ID=57947057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620906525.6U Expired - Fee Related CN205945013U (en) | 2016-08-22 | 2016-08-22 | Distribution network zero line fault protection ware based on zero line voltage -to -ground |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205945013U (en) |
-
2016
- 2016-08-22 CN CN201620906525.6U patent/CN205945013U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170208 |
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| CF01 | Termination of patent right due to non-payment of annual fee |