CN106451332A - Quadrupole circuit breaker - Google Patents
Quadrupole circuit breaker Download PDFInfo
- Publication number
- CN106451332A CN106451332A CN201610715929.1A CN201610715929A CN106451332A CN 106451332 A CN106451332 A CN 106451332A CN 201610715929 A CN201610715929 A CN 201610715929A CN 106451332 A CN106451332 A CN 106451332A
- Authority
- CN
- China
- Prior art keywords
- phase line
- current
- phase
- line
- neutral
- 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.)
- Pending
Links
- 230000007935 neutral effect Effects 0.000 claims abstract description 58
- 239000004020 conductor Substances 0.000 claims description 34
- 238000001514 detection method Methods 0.000 abstract 2
- VAYOSLLFUXYJDT-RDTXWAMCSA-N Lysergic acid diethylamide Chemical class C1=CC(C=2[C@H](N(C)C[C@@H](C=2)C(=O)N(CC)CC)C2)=C3C2=CNC3=C1 VAYOSLLFUXYJDT-RDTXWAMCSA-N 0.000 abstract 1
- 238000005760 Tripper reaction Methods 0.000 abstract 1
- 230000005611 electricity Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000035772 mutation Effects 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
- H02H3/08—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 excess current
- H02H3/083—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 excess current for three-phase systems
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention relates to a quadrupole circuit breaker. The quadrupole circuit breaker mainly comprises a first phase line, a second phase line and a third phase line, which are arranged in parallel. Along the direction of current, a tripper and a phase line current detection element are arranged in series on each of the first phase line, the second phase line and the third phase line. A neutral line is arranged in parallel with the first phase line, the second phase line and the third phase line. A neutral line current detection element is arranged on the neutral line along the direction of current. The current setting value of the neutral line is 0.5, 1 or 2 times the current setting values of the phase lines. When the neutral line is over-current or short-circuited, the trippers on the three phase lines are broken at the same time. In addition to a neutral line protection function, the quadrupole circuit breaker has the advantage of no zero line breaking possessed by a three-pole circuit breaker.
Description
Technical field
The present invention relates to low-voltage distribution system, especially designs to the protection device of low-voltage distributing line.
Background technology
Low-voltage circuit breaker is the protection device that commonly uses in low-voltage distribution system.As the diversification of electrical equipment is produced and low
The development of press-fitting electric system form, in 380/220V three-phase four-wire low-voltage distribution system, it is considered to three phase unbalance current or negative
The impact of triple-frequency harmonics in load, the application of four-pole circuit breaker is also more and more, but some systems do not allow to disconnect the neutral conductor or load
There is phenomenon off zero during heart system operation, generally adopt three-pole breaker.In order to centrage protection should be considered, avoid again breaking
The generation of zero phenomenon, also has using three-pole breaker and adds neutral conductor transformer to meet use demand.
Content of the invention
The present invention proposes a kind of four-pole circuit breaker of neutral conductor not disjunction, the work(of existing four-pole circuit breaker neutral conductor protection
Can, have the advantages that three-pole breaker is not off zero again.
The technical scheme is that：A kind of four-pole circuit breaker, main the first phase line for including to be mutually juxtaposed setting, second
Phase line and third phase line, along the sense of current, are sequentially connected in series setting respectively on the first phase line, the second phase line and third phase line and thread off
Device and phase line current detecting element；The neutral conductor is set up in parallel with first phase line, the second phase line and third phase line, along electric current side
To setting neutral current detecting element on the neutral conductor；The current setting of the neutral conductor is adjusted for phase line current
0.5 times or 1 times or 2 times of value, when neutral conductor excessively stream or short circuit, the electrical apparatus release in three phase lines should be while disjunction.
Core content of the present invention is to be provided with current measuring element on its neutral conductor, without arranging electrical apparatus release.Which is neutral
The protection that line is provided with, can be arranged for three kinds of situations such as 0.5 times, 1 times or 2 times of phase line current setting valve by current setting.
When neutral conductor excessively stream or short circuit, disjunction answered by the electrical apparatus release in three phase lines, and the neutral conductor is continuous.
The present invention cancels the electrical apparatus release for disjunction on the neutral conductor, keeps four-pole circuit breaker on traditional four-pole circuit breaker
Other functions are constant.
The present invention multiple systems form such as TT, TN-C-S, TN-S suitable for current low-voltage distribution system, applies future
Widely, where except the disjunction neutral conductor is clearly required, other positions can all be installed.
In theory, in the power system of preferable three-phase equilibrium, the neutral conductor does not carry electric current, but in three-phase imbalance and
When the power factor (PF) of each phase load is inconsistent, can there is certain electric current in the neutral conductor, or even its electric current is likely larger than phase line electricity
Stream.Secondly, in practical application, the presence of triple-frequency harmonics in load is even more and substantially increases the electric current that the neutral conductor flows through.Thus,
Need to set overcurrent protection in many occasion neutral conductors.Again, the neutral conductor has the work(for reducing load-side neutral potential offset
Energy.In the event of broken neutral line accident, be commonly called as " off zero ", then will result in the mutation of single-phase voltage, i.e., become 0 from 220 volts～
380 volts.Single-phase overvoltage can cause a large amount of electrical appliance overvoltages to burn out, and under-voltage the RCD related to voltage can be caused to fail.
So, the contact of the neutral conductor must be good, and connection must be reliable.
The application of the present invention will improve the defencive function of switch, reduce failure risk.Meanwhile, also provide to electrical design teacher
New selection, that is, facilitate and reliable.
Description of the drawings
Fig. 1 is the schematic diagram of the present invention.
Specific embodiment
As shown in figure 1, four-pole circuit breaker, main the first phase line L1 for including to be mutually juxtaposed setting, the second phase line L2 and the
Triple line L3, along the sense of current, is sequentially connected in series setting respectively on the first phase line L1, the second phase line L2 and third phase line L3 and threads off
Device 1 and phase line current detecting element 2；Neutral conductor N is set up in parallel with the first phase line L1, the second phase line L2 and third phase line L3, edge
The sense of current, the current setting for arranging neutral current detecting element 3, the neutral conductor N on neutral conductor N is phase line current
0.5 times of setting valve or 1 times or 2 times, the i.e. current setting of neutral current detecting element 3 are phase line current detecting element 2
0.5 times, 1 times or 2 times of current setting；When neutral conductor excessively stream or short circuit, the electrical apparatus release 1 in three phase lines should the same time-division
Disconnected.
In four line distribution system of low voltage three-phase, the present invention can determine neutral current detecting element 3 by following principle
Current setting：
1st, when Estimation System three phase unbalance current is compared with hour, neutral current is typically not over 1/2 phase line current.Chopper
It is chosen as three phase pole L and there is overload and short-circuit protection, neutral pole N has 0.5 times of overcurrent protection.I.e.：When neutral conductor electricity
When flowing 50% more than phase line overcurrent action setting valve, neutral pole overcurrent protection action, cause chopper phase pole electrical apparatus release to be jumped
Lock.Neutral conductor N section can be the 1/2 of phase line L section.
2nd, when system three phase unbalance current is larger or has triple-frequency harmonics（Less than 33%）, neutral current typically will not
More than phase line current.Chopper is chosen as three phase pole L and has overload and short-circuit protection, and neutral pole N has 1 times of over current protection
Shield.I.e.：When neutral current exceedes the 100% of phase line overcurrent action setting valve, neutral pole overcurrent protection action, cause
The electrical apparatus release tripping operation of chopper phase pole.Neutral conductor N can wait in section isopen L section.
3rd, when system has three times of higher composition and three multiple harmonic waves（More than 33%）, neutral conductor N will carry higher humorous
Ripple electric current, neutral current typically can exceed phase line current, should now strengthen neutral conductor overcurrent protection measure and be protected.Disconnected
Road device is chosen as three phase pole L and has overload and short-circuit protection, and neutral pole N has 2 times of overcurrent protection, i.e.,：Work as the neutral conductor
When electric current exceedes the 200% of phase line overcurrent action setting valve, neutral pole overcurrent protection action, cause chopper phase line to be threaded off
Device trips.Neutral conductor N section can be the multiple in phase line L section.
Implement the scheme that provided of example to the present invention above to be discussed in detail, for one of ordinary skill in the art, according to
According to the thought of the embodiment of the present invention, all will change in specific embodiments and applications.In sum, this explanation
Book content should not be construed as limiting the invention, and all any changes that is made according to design philosophy of the present invention are all in the guarantor of the present invention
Within the scope of shield.
Claims (1)
1. a kind of four-pole circuit breaker, mainly includes to be mutually juxtaposed the first phase line of setting（L1）, the second phase line（L2）And third phase
Line（L3）, along the sense of current, respectively in first phase line（L1）, second phase line（L2）With the third phase line（L3）On
It is sequentially connected in series setting electrical apparatus release（1）With phase line current detecting element（2）, it is characterised in that：The neutral conductor（N）With first phase line
（L1）, second phase line（L2）With the third phase line（L3）It is set up in parallel, along the sense of current, in the neutral conductor（N）On
Neutral current detecting element is set（3）；The neutral conductor（N）Current setting be 0.5 times or 1 of phase line current setting valve
Times or 2 times, when the neutral conductor excessively stream or short circuit when, the electrical apparatus release in three phase lines（1）Should be while disjunction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610715929.1A CN106451332A (en) | 2016-08-25 | 2016-08-25 | Quadrupole circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610715929.1A CN106451332A (en) | 2016-08-25 | 2016-08-25 | Quadrupole circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106451332A true CN106451332A (en) | 2017-02-22 |
Family
ID=58182983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610715929.1A Pending CN106451332A (en) | 2016-08-25 | 2016-08-25 | Quadrupole circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106451332A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860036A (en) * | 2010-05-07 | 2010-10-13 | 江苏省电力公司连云港供电公司 | Novel zero-sequence current compensator |
| CN203882915U (en) * | 2014-05-23 | 2014-10-15 | 施耐德电器工业公司 | Four-pole circuit breaker |
| CN206099289U (en) * | 2016-08-25 | 2017-04-12 | 华东建筑设计研究院有限公司 | Four -pole circuit breaker |
-
2016
- 2016-08-25 CN CN201610715929.1A patent/CN106451332A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860036A (en) * | 2010-05-07 | 2010-10-13 | 江苏省电力公司连云港供电公司 | Novel zero-sequence current compensator |
| CN203882915U (en) * | 2014-05-23 | 2014-10-15 | 施耐德电器工业公司 | Four-pole circuit breaker |
| CN206099289U (en) * | 2016-08-25 | 2017-04-12 | 华东建筑设计研究院有限公司 | Four -pole circuit breaker |
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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 | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170222 |