CN206135392U - Disconnected zero -sum in area lacks looks protect function's circuit breaker - Google Patents
Disconnected zero -sum in area lacks looks protect function's circuit breaker Download PDFInfo
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- CN206135392U CN206135392U CN201621178762.1U CN201621178762U CN206135392U CN 206135392 U CN206135392 U CN 206135392U CN 201621178762 U CN201621178762 U CN 201621178762U CN 206135392 U CN206135392 U CN 206135392U
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Abstract
The utility model discloses a disconnected zero -sum in area lacks looks protect function's circuit breaker is the upgradings technique to current three -phase electric leakage circuit breaker, increases on the basis of current three -phase electric leakage circuit breaker that the zero line opens circuit and default -phase fault detection module. The utility model discloses simple structure, it is with low costs, not only remain original overload, short circuit, electric leakage protection function, increased still simultaneously that the zero line opens circuit or the protect function of default -phase fault to three -phase load circuit. The utility model is used for load circuit carries out the real -time guard to low voltage network three -phase four -wire.
Description
Technical field
The utility model is related to a kind of Multifunctional breaker, for the real-time guarantor of low-voltage network three-phase and four-line load circuit
Shield, it is specifically a kind of with off zero and default-phase protection function breaker.
Background technology
In low-voltage network zero line break, the voltage meeting serious unbalance on three-phase load circuit so results in part
Voltage on electric equipment is raised suddenly, causes a large amount of household electrical appliance of resident to burn, and causes serious economic damage；It is same with this
When, after zero line break, the zero line voltage-to-ground of three-phase load circuit side is also no longer zero, and this is possible to make some be abutted against zero guarantor
Dangerous voltage on the electric equipment band of shield, seriously threatens user's personal safety；In addition, low-voltage network open-phase fault also when have
Occur, the threephase asynchronous in phase-deficient operation, rotating speed can drastically decline, so as to cause motor overheating, if after phase shortage
Can not cut off the electricity supply in time, motor will burn；Further, the increase suddenly of neutral line current is will also result in while phase shortage, from
And the safe operation to zero line constitutes a threat to.As can be seen here, either zero line break, or phase-deficient operation, if can not cut in time
Power-off source, its consequence is extremely serious.But occur to this time interval of cutting off the electricity supply to require extremely short, this process from failure
The controlling organization of circuit can be leaned on to be automatically performed.From the point of view of the situation of the various general breaker that current low-voltage network is used,
The existing various circuit breaker designs with zero line break and open-phase protection are relative complex, and cost of manufacture is higher.
Utility model content
In order to solve above-mentioned technical problem present in prior art, the utility model aims to provide one kind with off zero and scarce
The breaker of phase defencive function, to upgrade to existing three-phase and four-line RCCB, it is in highly developed leakage
A zero line break and open-phase fault detecting module are loaded on electrical circuit breakers, and takes easy docking, upgraded to one
Multifunctional breaker, to reduce the development cost of new technology, shortens the construction cycle, makes full use of current RCCB maturation
Dropout technology, the unfailing performance for making the Multifunctional breaker after upgrading accesses guarantee.
The utility model for achieving the above object, is achieved through the following technical solutions：
It is a kind of with off zero and default-phase protection function breaker, it includes trip switch, the contact of trip switch first, threads off
Switch the second contact, the contact of trip switch the 3rd, tripping coil, current signal amplification and tripping coil drive circuit, electric current mutual
Sensor, zero line break and open-phase fault detecting module；
Zero line break and open-phase fault detecting module are used for zero line break, the detection of open-phase fault and amplify for current signal
And the work of tripping coil drive circuit provides power supply.The zero line break and open-phase fault detecting module include the first～the 3rd
Electrodeless electric capacity, the first～the 6th diode, the first current-limiting resistance and the second current-limiting resistance；Wherein：
The parameter of the first～the 3rd electrodeless electric capacity is consistent；
First～the 6th diode constitutes three-phase bridge rectifier circuit, and zero line break and open-phase fault detecting module have three
Input；
The anode of first diode, the 3rd diode and the 5th diode, connects correspondingly zero line break and lacks
One in the input of phase fault detecting module；First diode, the 3rd diode are connected to the negative electrode of the 5th diode
Together, Jing after the second current-limiting resistance current limliting as zero line break and the positive output end of open-phase fault detecting module；
The negative electrode of second diode, the 4th diode and the 6th diode, connects respectively zero line break and open-phase fault
Three inputs of detecting module；Second diode, the 4th diode link together with the anode of the 6th diode, used as zero
Line open circuit and the negative output terminal of open-phase fault detecting module；
The respective one end of three electrodeless electric capacities, connects correspondingly the input of zero line break and open-phase fault detecting module
One in end；The respective other end of three electrodeless electric capacities links together, disconnected as zero line Jing after the first current-limiting resistance current limliting
Road and the neutral sampling output end of open-phase fault detecting module；
Three inputs of zero line break and open-phase fault detecting module connect respectively the contact of trip switch first, dropout and open
Close the second contact, the corresponding phase line of the lower edge of a knife of the contact of trip switch the 3rd；Zero line break and open-phase fault detecting module
Neutrality sampling output end is connected through after the magnet ring of current transformer with zero line output end；
The positive output end of zero line break and open-phase fault detecting module is connected to current signal and amplifies and tripping coil driving
One control output end of circuit, current signal amplifies and another controlled output of tripping coil drive circuit terminates to dropout
One end of coil, another terminal connecting zero line open circuit of tripping coil and the negative output terminal of open-phase fault detecting module, zero line break and
Open-phase fault detecting module, current signal amplify and one series connection for closing of tripping coil drive circuit and tripping coil composition
Circuit；The input of the contact of trip switch first, the contact of trip switch second, the upper edge of a knife of the contact of trip switch the 3rd and zero line
End, as the input of the breaker with off zero and default-phase protection function, for being connected to three-phase four-wire power.
Used as optimization of the present utility model, the parameter of the described first～the 6th diode is consistent.
The utility model as a result of above-mentioned structure, its compared with prior art, acquired technological progress is：
（1）The utility model is the upgrading to existing three-phase and four-line RCCB, in highly developed three-phase four
One " zero line break and open-phase fault detecting module " is loaded on line RCCB and take the docking of simplicity, the module of increase
Simple structure, low cost；
（2）The utility model not only remains original overload, short circuit, creepage protection function, while also add generation
To the defencive function of three-phase and four-line load circuit when zero line break or open-phase fault.
The utility model is used to carry out real-time guard to low-voltage network three-phase and four-line load circuit.
Description of the drawings
Accompanying drawing is used for providing further understanding to of the present utility model, and constitutes a part for specification, with this practicality
New embodiment is used to explain the utility model together, does not constitute to restriction of the present utility model.
In the accompanying drawings：
Fig. 1 is the zero line break and open-phase fault detecting module circuit diagram of the utility model embodiment；
In Fig. 2（a）It is the fault vectors figure off zero of the utility model embodiment；
（b）It is the open-phase fault vectogram of the utility model embodiment；
（c）It is the off zero and phase shortage of the utility model embodiment while the vectogram that breaks down；
Fig. 3 is the inside and outside wiring diagram of the band breaker off zero and default-phase protection function of the utility model embodiment.
In figure：In, three-phase four-wire power, A1, leakage current signal transacting and tripping coil control circuit, A2, zero line break
And open-phase fault detecting module, L, tripping coil, X, the magnet ring of current transformer, M, three-phase and four-line load circuit, QF, dropout
Switch, T1, the contact of trip switch first, T2, the contact of trip switch second, T3, the contact of trip switch the 3rd.
Specific embodiment
Preferred embodiment of the present utility model is illustrated below in conjunction with accompanying drawing.It should be appreciated that described herein excellent
Select embodiment to be merely to illustrate and explain the utility model, be not used to limit the utility model.
Embodiment is a kind of with off zero and default-phase protection function breaker
The present embodiment is as shown in figure 3, including trip switch QF, trip switch the first contact T1, the contact of trip switch second
T2, the contact T3 of trip switch the 3rd, tripping coil L, current signal amplify and tripping coil drive circuit A1, current transformer
（Current transformer only gives magnet ring X in figure）, and zero line break and open-phase fault detecting module A2.
As shown in figure 1, zero line break and open-phase fault detecting module A2 include electrodeless electric capacity C1, C2, C3, also including two poles
Pipe D1, D2, D3, D4, D5 and D6, also including current-limiting resistance R1 and current-limiting resistance R2.
It is U1, V1 and W1 that zero line break and open-phase fault detecting module A2 have three inputs.
Six diodes D1, D2, D3, D4, D5, D6 are preferably parameter identical product, and they collectively constitute three-phase bridge
Rectification circuit.
In the present embodiment, current-limiting resistance R1 is common small-power resistance, and current-limiting resistance R2 is using high-power cement electricity
Resistance.
The anode of diode D1, D3, D5, connect respectively the input U1 of zero line break and open-phase fault detecting module A2, V1,
W1.The negative electrode of diode D1, D3, D5 links together, Jing after current-limiting resistance R2 as zero line break and open-phase fault detection mould
The positive output end of block A2+.
The negative electrode of diode D2, D4, D6, connect respectively the input U1 of zero line break and open-phase fault detecting module A2, V1,
W1.The anode of diode D2, D4, D6 links together, used as zero line break and the negative output of open-phase fault detecting module A2
End-.
The parameter of three electrodeless electric capacities C1, C2, C3 is consistent.The respective one end of electrodeless electric capacity C1, C2, C3 connects respectively zero line
Open circuit and input U1, V1, W1 of open-phase fault detecting module A2.The respective other end of stepless electric capacity C1, C2, C3 is connected to one
Rise, Jing after current-limiting resistance R1 as zero line break and neutral sampling output end N1 of open-phase fault detecting module A2.
As shown in figure 3, the inside of the present embodiment, by the input U1 of zero line break and open-phase fault detecting module A2, V1,
W1 connects respectively the first contact T1, the second contact T2, the corresponding phase of the lower edge of a knife of the 3rd contact T3 that circuit breaker tripping switchs QF
Line U2, V2, W2, neutrality sampling output end N1 is connected through after the magnet ring X of current transformer with zero line output end N2.
The positive output end of zero line break and open-phase fault detecting module A2+be connected to current signal amplification and tripping coil drive
One control output end of dynamic circuit A1, current signal amplifies and another controlled output of tripping coil drive circuit A1 is terminated
One end, tripping coil L to tripping coil L another terminal connecting zero line open circuit and open-phase fault detecting module A2 negative output terminal-,
I.e. zero line break and open-phase fault detecting module A2, current signal amplify and tripping coil drive circuit A1 and tripping coil L
Three constitutes the series circuit of a closure.
The outside of a kind of breaker with off zero and default-phase protection function that the present embodiment is provided, according further to three-phase and four-line
RCCB it is original connect martingale, i.e. the first contact of trip switch T1, trip switch the second contact T2, trip switch
The upper edge of a knife and zero line input adapter of three contact T3, breaker the present embodiment of and default-phase protection function off zero respectively as band
Input, for meeting four terminals U, V, W, N of three-phase four-wire power.The output end of the present embodiment is used to connect three-phase and four-line
Load circuit M.
Operation principle of the present embodiment in the case of different faults is described below：
（1）The zero line of transmission line of electricity is when there is open circuit in the input side of the present embodiment
If load circuit M is asymmetric for three-phase and four-line, the neutral point of three-phase and four-line load circuit M sides（Zero line）The current potential of N '
U N′Neutral point, and more serious its zero line current potential U of uneven degree will be deviateed N′Deviate neutral point more remote, but in A2
Property sampled point N1 current potential be but still maintained at the position of neutral point, i.e. zero potential, in such as Fig. 2（a）Shown, this will be in point N1
Unbalance voltage is formed between N ', in the presence of the voltage so that N1 --- uneven electricity is produced in N ' wires
Stream, as shown in Figure 3 the wire be in connection procedure through current transformer magnet ring X, at this moment will be in current transformer
Secondary side output signal, the signal drives electromagnetic trip coil Jing after current signal amplifies and tripping coil drive circuit A1 amplifies
L, makes trip switch QF actions, cuts off the electricity supply, and three-phase and four-line load circuit M is protected.
（2）If when there is open circuit, i.e. phase shortage in a certain input side in the present embodiment of transmission line of electricity
The current potential of the neutral sampled point N1 of zero line break and open-phase fault detecting module A2 will deviate neutral point, but
The current potential U of three-phase and four-line load circuit M sides zero lineN′The neutral point U remained unchanged with power supply in the presence of zero lineNIt is consistent, i.e.,
Zero potential, such as Fig. 2（B）, out-of-balance current is then produced between N1 and N ', so in the secondary side output letter of current transformer
Number, the signal drives electromagnetic trip coil L Jing after current signal amplifies and tripping coil drive circuit A1 amplifies, and makes trip switch
QF actions, cutting off the electricity supply is protected three-phase and four-line load circuit M.
（3）Zero line break and open-phase fault occur simultaneously
The current potential of the neutral sampled point N1 of zero line break and open-phase fault detecting module A2 first can deviate because of open-phase fault
Neutral point zero potential, but because the symmetry of electric capacity causes the current potential just between the midpoint of line voltage；And three-phase and four-line
The current potential U of load circuit M sides zero lineN′Also neutral point can be deviateed because of zero line break failure, due to three-phase and four-line load circuit M not
Symmetrically, along with the reason of phase shortage, the at this moment current potential U of three-phase and four-line load circuit M sides zero lineN′Be not only deviating from neutral point and
The midpoint of line voltage can be deviateed, in such as Fig. 2（c）Shown, this has resulted in N1 and N′Current potential it is unequal, then in N1 and N′It
Between produce out-of-balance current, so in the secondary side output signal of current transformer, signal Jing current signals amplify and thread off
Coil driver A1 drives electromagnetic trip coil L after amplifying, and makes trip switch QF actions, and cutting off the electricity supply loads three-phase and four-line
Circuit M is protected.
Finally it should be noted that：Preferred embodiment of the present utility model is the foregoing is only, this is not limited to
Utility model, although being described in detail to the utility model with reference to the foregoing embodiments, for those skilled in the art
For, it still can modify to the technical scheme described in foregoing embodiments, or to which part technical characteristic
Carry out equivalent.It is all it is of the present utility model spirit and principle within, any modification, equivalent substitution and improvements made etc.,
Should be included within protection domain of the present utility model.
Claims (2)
1. a kind of with off zero and default-phase protection function breaker, it includes that trip switch, the contact of trip switch first, dropout are opened
Close the second contact, the contact of trip switch the 3rd, tripping coil, current signal to amplify and tripping coil drive circuit, Current Mutual Inductance
Device, it is characterised in that：It also includes zero line break and open-phase fault detecting module, the zero line break and open-phase fault detection mould
Block includes the first～the 3rd electrodeless electric capacity, the first～the 6th diode, the first current-limiting resistance and the second current-limiting resistance；Wherein：
The parameter of the first～the 3rd electrodeless electric capacity is consistent；
First～the 6th diode constitutes three-phase bridge rectifier circuit, and zero line break and open-phase fault detecting module have three inputs
End；
The anode of first diode, the 3rd diode and the 5th diode, connects correspondingly zero line break and phase shortage event
One in the input of barrier detecting module；First diode, the 3rd diode link together with the negative electrode of the 5th diode,
Jing after the second current-limiting resistance current limliting as zero line break and the positive output end of open-phase fault detecting module；
The negative electrode of second diode, the 4th diode and the 6th diode, connects respectively zero line break and open-phase fault detection
Three inputs of module；Second diode, the 4th diode link together with the anode of the 6th diode, disconnected as zero line
Road and the negative output terminal of open-phase fault detecting module；
Respective one end of three electrodeless electric capacities, during the input of zero line break and open-phase fault detecting module is connected correspondingly
One；The respective other end of three electrodeless electric capacities links together, Jing after the first current-limiting resistance current limliting, as zero line break and
The neutral sampling output end of open-phase fault detecting module；
Three inputs of zero line break and open-phase fault detecting module connect respectively the contact of trip switch first, trip switch
The corresponding phase line of two contacts, the lower edge of a knife of the contact of trip switch the 3rd；The neutrality of zero line break and open-phase fault detecting module
Sampling output end is connected through after the magnet ring of current transformer with zero line output end；
The positive output end of zero line break and open-phase fault detecting module is connected to current signal and amplifies and tripping coil drive circuit
A control output end, current signal amplifies and another controlled output of tripping coil drive circuit terminates to tripping coil
One end, another terminal connecting zero line open circuit of tripping coil and the negative output terminal of open-phase fault detecting module, zero line break and phase shortage
Fault-finding module, current signal amplify and one series electrical for closing of tripping coil drive circuit and tripping coil composition
Road；The input of the contact of trip switch first, the contact of trip switch second, the upper edge of a knife of the contact of trip switch the 3rd and zero line
End, as the input of the breaker with off zero and default-phase protection function, for being connected to three-phase four-wire power.
2. according to claim 1 a kind of with off zero and default-phase protection function breaker, it is characterised in that：Described first
The parameter of the～the six diode is consistent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621178762.1U CN206135392U (en) | 2016-10-27 | 2016-10-27 | Disconnected zero -sum in area lacks looks protect function's circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621178762.1U CN206135392U (en) | 2016-10-27 | 2016-10-27 | Disconnected zero -sum in area lacks looks protect function's circuit breaker |
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| Publication Number | Publication Date |
|---|---|
| CN206135392U true CN206135392U (en) | 2017-04-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106356811A (en) * | 2016-10-27 | 2017-01-25 | 国网冀北电力有限公司张家口供电公司 | Circuit breaker with faulted neutral line and default phase protection function |
-
2016
- 2016-10-27 CN CN201621178762.1U patent/CN206135392U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106356811A (en) * | 2016-10-27 | 2017-01-25 | 国网冀北电力有限公司张家口供电公司 | Circuit breaker with faulted neutral line and default phase protection function |
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