CN207381959U - A kind of new residual current action breaker - Google Patents
A kind of new residual current action breaker Download PDFInfo
- Publication number
- CN207381959U CN207381959U CN201721483373.4U CN201721483373U CN207381959U CN 207381959 U CN207381959 U CN 207381959U CN 201721483373 U CN201721483373 U CN 201721483373U CN 207381959 U CN207381959 U CN 207381959U
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- breaker
- control circuit
- circuit board
- residual current
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Abstract
The utility model discloses a kind of new residual current action breakers; include the breaker of control circuit board, buckle releaser, contact and metal sensor composition; computation chip and microprocessor are equipped in the control circuit board; the control circuit board connects buckle releaser and metal sensor respectively; the current parameters that the L and N lines of the breaker are respectively gone here and there on a respective circuit of metal sensor acquisition; the electric current of L lines and N lines progress vector sum is calculated to the residual current value of breaker, electric shock and creepage protection function so as to fulfill breaker by control circuit board.The defencive function and characteristic of the breaker are unrelated with zero sequence current mutual inductor, so as to effectively avoid influence of the intrinsic deficiency of zero sequence current mutual inductor to breaker, it is ensured that the safety of electricity consumption.
Description
Technical field
The utility model is related to got an electric shock, leaked electricity to circuit-line etc. the residual current action breaker protected and
Similar Protector for using electricity, in particular to a kind of new residual current action breaker without using zero sequence current mutual inductor.
Background technology
At present, well known residual current action breaker（RCCB、RCBO、ELCB、RCD）Construction is by operating mechanism, leads
Electric system, electromagnetic system（With the residual current action breaker crossed in protection）, electric heating system（With the residual current crossed in protection
Action breaker）, zero sequence current mutual inductor, buckle releaser, control circuit, contact system, the compositions such as Arc System.The master of breaker
Circuit is by zero sequence current mutual inductor, when each line flows of breaker major loop cross the current phasor and not of zero sequence current mutual inductor
During equal to 0, the secondary of zero sequence current mutual inductor will generate induced electromotive force, be connected to the dropout of zero sequence current mutual inductor secondary
Coil will generate magnetic field, so that buckle releaser generates movement and exports mechanical force, promote circuit breaker tripping and cut off load electricity
Source avoids electric shock or the generation for accident of leaking electricity.It is but this kind of by the surplus of zero sequence current mutual inductor acquisition secondary induction voltage
Aftercurrent action breaker is influenced very greatly by the self character of zero sequence current mutual inductor, because breaker use environment temperature
Different, use occasion vibrations degree difference, all can be to the characteristic of zero sequence current mutual inductor with electric line dash current size etc.
It causes to change, same residual current is caused to induce different voltage, be susceptible to breaker malfunction or refused action, cause
Electric shock or electric leakage accident.More seriously, since the sensing of zero sequence current mutual inductor is curved line relation, there is saturated vertex, institute
During there is high current using the residual current action breaker of zero sequence current mutual inductor, zero sequence current mutual inductor be easily saturated and
Irrecoverability damages, this brings very big security risk to using, and is brought to production and living dangerous with loss.
Utility model content
In order to which zero sequence current mutual inductor is overcome to bring malfunction or tripping to the defencive function of residual current action breaker
Make problem, the utility model provides a kind of new residual current action breaker, the defencive function and characteristic and zero of the breaker
Sequence current transformer is unrelated, so as to effectively avoid influence of the intrinsic deficiency of zero sequence current mutual inductor to breaker, it is ensured that
The safety of electricity consumption.
In order to achieve the above object, the utility model provides following technical solution：A kind of new residual current acting breaks
Road device includes the breaker of control circuit board, buckle releaser, contact and metal sensor composition, is equipped in the control circuit board
Computation chip and microprocessor, the control circuit board connect buckle releaser and metal sensor respectively, L the and N lines of the breaker
Each one metal sensor of string gathers the current parameters on respective circuit, is carried out the electric current of L lines and N lines by control circuit board
The residual current value of breaker is calculated in vector sum, electric shock and creepage protection function so as to fulfill breaker.
It is further preferred that it is not provided with zero sequence current mutual inductor in the major loop of the breaker.
It is further preferred that the metal sensor can gather electrical parameter.
It is further preferred that by computation chip and microprocessor in control circuit board, to metal sensor acquisition
Electrical parameter carries out that residual current is calculated.
It is further preferred that collected metal sensor by the computation chip on control circuit board and microprocessor
Voltage difference and the constant resistance of metal sensor are calculated current value, then L lines and N lines are each converted and got using Ohm's law
Electric current carry out vector sum calculating, obtain the residual current value of breaker.
It is further preferred that the control circuit board by residual current calculate as a result, according to residual current sizes values
Definition determine the electric leakage of breaker and electrical shock protection characteristic, change action command into and pass to corresponding tripping system, so as to
Realize electric shock and the creepage protection function of breaker.
The beneficial effects of the utility model：The electric shock of the residual current action breaker and earth leakage protective characteristic are from temperature
The influence for the problems such as degree, vibration, CT saturation and heavy current impact damage, the spy for keeping residual current action breaker
Property it is stable, reliable, so using the residual current action breaker of the utility model in the personal electrical shock safety of protection, avoid equipment
Electric leakage accident prevents leakage fire etc. more safe and reliable.
Description of the drawings
Attached drawing 1 is the circuit diagram of the utility model.
Marginal data：1st, control circuit board；2nd, buckle releaser；3rd, contact；4th, metal sensor.
Specific embodiment
We do further a kind of new residual current action breaker described in the utility model with reference to attached drawing below
Explanation.
As shown in fig. 1, a kind of new residual current action breaker of the present embodiment including control circuit board 1, is threaded off
The breaker that device 2, contact 3 and metal sensor 4 form is equipped with computation chip and microprocessor, institute in the control circuit board 1
It states control circuit board 1 and connects buckle releaser 2 and metal sensor 4, L and N lines one metal sensor 4 of each string of the breaker respectively
Gather the current parameters on respective circuit, by control circuit board 1 by the electric current of L lines and N lines progress vector sum be calculated it is disconnected
The residual current value of road device, electric shock and creepage protection function so as to fulfill breaker.
Zero sequence current mutual inductor is not provided in the major loop of the breaker.
The metal sensor 4 can gather electrical parameter.
By the computation chip and microprocessor in control circuit board 1, the electrical parameter gathered to metal sensor 4 is counted
Calculation obtains residual current.
Pass through the voltage difference that the computation chip on control circuit board 1 and microprocessor collect metal sensor 4 and gold
Belong to the constant resistance of sensor 4 using Ohm's law, calculate current value, then the electric current got that L lines and N lines are each converted carries out
Vector sum calculates, and obtains the residual current value of breaker.
The control circuit board 1 by residual current calculate as a result, according to being determined to the definition of residual current sizes values
The electric leakage of breaker and electrical shock protection characteristic change action command into and pass to corresponding tripping system, so as to fulfill breaker
Electric shock and creepage protection function.
In the present embodiment, in L and N lines one metal sensor of each string of breaker, metal sensor is real impedance property
, for gathering the current parameters on respective circuit, the method for acquisition is when electric current passes through metal sensor, since metal passes
Sensor is pure resistance characteristic, so voltage difference can be formed at metal sensor both ends, passes through the metering core on control circuit board
This voltage difference and the constant resistance of metal sensor are utilized Ohm's law by piece and microprocessor, just converse current value.By L lines
The electric current got that each converts with N lines carries out vector sum calculating, it is possible to obtain the residual current value of breaker.Again by surplus
The definition of aftercurrent sizes values determines the electric leakage of breaker and electrical shock protection characteristic, so as to fulfill the electric shock and electric leakage of breaker
Defencive function.Because the resistance value of metal sensor is constant, electric current, the relation of voltage are straight line sexual intercourse, parameter conversion
Accurately, from temperature, the influence of vibration, also there is no saturations and heavy current impact damage problem.So the utility model residual current
The characteristic of action breaker effectively avoids the problems such as temperature, vibration, CT saturation and heavy current impact damage, real
More safe and stable purpose is showed.
Circular is as follows
Residual current I△n:
The electric current I of L linesL：
Voltage difference U by the metal sensor both ends connected on L linesl, the resistance R with metal sensorl, determined by ohm
Rule is calculated：
IL = Ul/Rl
The electric current I of N linesN：
Voltage difference U by the metal sensor both ends connected on N linesN, the resistance R with metal sensorN, determined by ohm
Rule is calculated：
IN = UN/RN
Pass through more than physical equation, it is possible to I be calculated△nPhysical values, be also known that breaker load end touch
Electricity or the current value I of electric leakageLeakageSizes values.
The application of result of calculation：
As obtained I△nLess than or equal to 15mA, (this value can be set difference, be herein according to different product requirements
It is illustrated with the rated residual operating current of 30mA, only for reference) when, control circuit board does not give buckle releaser to send ON Action,
Residual current action breaker normal ON working condition does not perform electric leakage and electrical shock protection action；
As obtained I△nMore than 15mA (this value can according to different product requirements, set it is different, herein simply with
The rated residual operating current of 30mA is illustrated, only for reference) when, control circuit board gives buckle releaser to send ON Action, remaining
Electric current action breaker is cut off separating brake, and in electroless state, breaker performs electric leakage and electrical shock protection action for load；
All these calculating is all by the computation chip on control circuit board and is stored in its microprocessor internal
Corresponding program and realize.
The scope of protection of the utility model is not limited to above example and its conversion.Those skilled in that art are with this implementation
The conventional modification and replacement carried out based on the content of example belongs to the protection category of the utility model.
Claims (3)
1. a kind of new residual current action breaker, it is characterised in that：Including control circuit board, buckle releaser, contact and metal
The breaker of sensor composition is equipped with computation chip and microprocessor, the control circuit board difference in the control circuit board
Buckle releaser and metal sensor are connected, each one metal sensor of string of L and N lines of the breaker gathers the electric current on respective circuit
The residual current value of breaker is calculated by control circuit board by parameter for the electric current of L lines and N lines progress vector sum, so as to
Realize electric shock and the creepage protection function of breaker.
2. a kind of new residual current action breaker according to claim 1, it is characterised in that：The master of the breaker
Zero sequence current mutual inductor is not provided in circuit.
3. a kind of new residual current action breaker according to claim 1, it is characterised in that：The metal sensor
Electrical parameter can be gathered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721483373.4U CN207381959U (en) | 2017-11-09 | 2017-11-09 | A kind of new residual current action breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721483373.4U CN207381959U (en) | 2017-11-09 | 2017-11-09 | A kind of new residual current action breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207381959U true CN207381959U (en) | 2018-05-18 |
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ID=62334962
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721483373.4U Active CN207381959U (en) | 2017-11-09 | 2017-11-09 | A kind of new residual current action breaker |
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| Country | Link |
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| CN (1) | CN207381959U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114062772A (en) * | 2020-08-07 | 2022-02-18 | 天津首瑞智能电气有限公司 | Residual current measuring circuit |
-
2017
- 2017-11-09 CN CN201721483373.4U patent/CN207381959U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114062772A (en) * | 2020-08-07 | 2022-02-18 | 天津首瑞智能电气有限公司 | Residual current measuring circuit |
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