CN101615778A - Intelligent electrical apparatus release - Google Patents
Intelligent electrical apparatus release Download PDFInfo
- Publication number
- CN101615778A CN101615778A CN200910162292A CN200910162292A CN101615778A CN 101615778 A CN101615778 A CN 101615778A CN 200910162292 A CN200910162292 A CN 200910162292A CN 200910162292 A CN200910162292 A CN 200910162292A CN 101615778 A CN101615778 A CN 101615778A
- Authority
- CN
- China
- Prior art keywords
- current
- circuit
- central control
- control unit
- voltage
- 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
Images
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The present invention relates to a kind of intelligent electrical apparatus release that adopts the authigenic power supply circuit supply, comprising: current transformer, the current detecting conditioning unit that links to each other with current transformer, the central control unit that links to each other with current detecting conditioning unit, the dropout drive circuit that links to each other with central control unit, and the dropout performance element of dropout drive circuit.The parameter control input end of central control unit is connected with the setting value input unit, and the communication data end of central control unit is connected with the serial communication interface that is used to connect host computer.During work, single-chip microcomputer is to carrying out the AD conversion by the voltage signal of current transformer after current detecting conditioning cell processing; And carry out logical operation and processing according to sampled value; operation result and setting value relatively back output meet the logic level signal of presetting protective feature; these signals are sent into the magnetic flow convertor in the dropout performance element behind the dropout drive circuit, make circuit breaker trip, cut off circuit.
Description
Technical field
The present invention relates to a kind of intelligent electrical apparatus release.
Background technology
Mold cased circuit breaker is a kind of important appliance switch in low-voltage distributing line and Motor Control and the protection.When be short-circuited in the circuit, when overcurrent and fault such as under-voltage, it can automatic shutdown circuit, and circuit and equipment are played a protective role.Traditional circuit breaker will dispose different releases in order to obtain different protective features.Along with the scale and the grade of using electricity system constantly enlarges, the more and more difficult requirement of satisfying reliability, accuracy and the real-time of system of traditional release.And for circuit breaker, mainly bear the electric power of fault current and impact and thermal shock, the i.e. dynamic stability of circuit breaker and thermal stability.Traditional circuit breaker adopts thermal relay to constitute overload protection, and the electromagnetism quick release constitutes long delay, wink moves two sections characteristics as short-circuit protection, realizes the integrated difficulty of defencive function.
For the electric power system of intelligent release hardware, the circuit of intelligent electric air cock can have three kinds of supply power modes: power source special power supply, the power supply of storage battery power supply summation current transformer, the latter is also referred to as self-powered.These three kinds of supply power modes can be used separately, also can be used, and form redundancy electric power supply system.Preceding two kinds of supply power modes do not have any difference with general microcomputer application system technically.Current transformer power supply is the peculiar a kind of supply power mode of circuit breaker, can save other power supply circuits when using separately, and can start working automatically along with the connection of electrical network, is a kind of desirable supply power mode.But current transformer power supply has following problem to deal carefully with:
1), because power supply energy derives from current transformer, so electric current hour is not enough to power supply in the electrical network circuit.2), when the electric current of electrical network circuit slowly rises, the voltage of self powered supply also is slowly to rise, and is unfavorable for the operate as normal of intelligence control circuit.3), because current transformer input current scope is very big, cause power supply circuits part components and parts heatings serious, influence system's operate as normal.
Summary of the invention
Technical problem to be solved by this invention provides a kind of intelligent electrical apparatus release that adopts current transformer power supply, hour still can operate as normal with electric current in the electrical network circuit.
For solving the problems of the technologies described above, the invention provides a kind of intelligent electrical apparatus release, comprising: current transformer, the current detecting conditioning unit that links to each other with the induced current output of current transformer, the central control unit that links to each other with the signal output part of current detecting conditioning unit, the dropout drive circuit that links to each other with the dropout control signal output ends of central control unit, the dropout performance element that links to each other with the output of dropout drive circuit.Described current transformer also is connected with the authigenic power supply circuit, and the power output end of authigenic power supply circuit links to each other with central control unit through the low level detecting unit; The authigenic power supply circuit comprises the filter circuit and the rectification circuit of contacting with the current output terminal of current transformer, and the positive pole of rectification circuit links to each other with the power end of central control unit and the power end of low level detecting unit through voltage stabilizing circuit.
The low level detecting unit comprises: the metal-oxide-semiconductor that the d utmost point links to each other with the positive pole of rectification circuit, the s utmost point of metal-oxide-semiconductor connects the negative pole of rectification circuit, the positive pole of rectification circuit is connected in series the backward end that connects comparator behind first current-limiting resistance, be provided with second current-limiting resistance and the 3rd current-limiting resistance of series connection between the positive and negative electrode of rectification circuit, the contact of second current-limiting resistance and the 3rd current-limiting resistance links to each other with the end in the same way of comparator, the g utmost point of the output termination metal-oxide-semiconductor of comparator, the g utmost point of metal-oxide-semiconductor also link to each other with the power supply control output end of central control unit; Be provided with first electric capacity and first voltage stabilizing didoe in parallel between the backward end of comparator and the negative pole of rectification circuit, be provided with the electrochemical capacitor and second voltage stabilizing didoe in parallel between the positive and negative electrode of rectification circuit.
When just powering on, because the g utmost point of metal-oxide-semiconductor and the voltage difference U gs between the s utmost point are zero, the electric current I ds between the d utmost point and the s utmost point is zero, and electric current produces a voltage drop by second current-limiting resistance and the 3rd current-limiting resistance; When the input current of current transformer hour, the current potential of the backward end of comparator is higher than end in the same way, comparator is output as zero, be that described Ugs is zero, metal-oxide-semiconductor is closed, and the electric current of the positive pole output of rectification circuit is powered to central control unit through voltage stabilizing circuit, charges to electrochemical capacitor simultaneously; When the input current of current transformer becomes big, because backward end its voltage under the effect of first voltage stabilizing didoe of comparator is constant, and the voltage that it is held in the same way is big and increase along with the change of described input current, cause the output voltage of comparator to become positive level, and described Ugs is higher than the threshold voltage of metal-oxide-semiconductor, the metal-oxide-semiconductor conducting, and the d utmost point of metal-oxide-semiconductor and the voltage difference U ds between the s utmost point drop to zero, at this moment, electrochemical capacitor discharge afterflow is the central control unit power supply; Along with the decline of voltage U ds, the voltage of end in the same way of comparator descends thereupon, and the output voltage of comparator is zero once more, and metal-oxide-semiconductor is closed once more, and so forth.
The present invention has positive effect: in (1) intelligent electrical apparatus release of the present invention, the present invention can power to system stability under the little current conditions guaranteeing, and under big current conditions, and is can protection system unaffected.Aspect the shortcoming that overcomes the self-powered mode, at first make the secondary input current of current transformer hour also can make power unit can stablize the output system normal working voltage; Moving time delay is long release wink when avoiding the combined floodgate short circuit occurring, the appropriate design circuit parameter, will wink moving time delay be controlled in the 15ms damage that because of electric power circuit is caused in the time of can avoiding short circuit.Aspect minimizing switch MOS pipe caloric value, with comparator control switch metal-oxide-semiconductor, can make the instantaneous power of metal-oxide-semiconductor always approach zero, effectively reduced the heating situation of power-supply system.During current transformer secondary current 23mA, can export the stable voltage of 15V in the present invention; The secondary three-phase total current of current transformer scope is when 0.06A-1.80A, and power unit can provide 8V and 5V voltage for system stability, and the power about about 0.2W; Guarantee that digital system can operate as normal.The present invention has a low-voltage decision circuitry, can make system's operate as normal, and can main zero clearing single-chip microcomputer in low-voltage.Power unit device of the present invention is when operate as normal, and each device especially instantaneous power of Primary Component switch MOS FET remains zero substantially, makes the unlikely system's operate as normal that influences of caloric value of components and parts.(2) control signal is set operating current and operate time etc. accurately and reliably at any time.Can on same circuit breaker, realize multiple function making single operating characteristics might accomplish the multiple operating characteristics of a kind of defencive function on the one hand; Circuit breaker is realized and the central control computer both-way communication, constituted intelligent monitoring, protection, information network system, make circuit breaker develop into intelligentized defencive function from basic defencive function.Intelligent controller utilizes the high-performance single-chip microcomputer that the load current in the circuit breaker is carried out real-time sampling, computing, the concurrent order of threading off of being out of order of judgement.It has that overload long delay, short circuit short time delay, specified time are threaded off, the inverse time lag threads off and defencive function such as short circuit is instantaneous.Wherein, specified time is threaded off and to be meant that controller sends the dropout action command after one section predetermined time-delay, and the deferred action time can be adjusted but not be subjected to the influence of overcurrent value.Inverse time lag threads off, and refers to that the deferred action time is relevant with the current value that passes through, and current value is big more, and operate time is short more.The short circuit instantaneous trip refers to when electric current reaches the instantaneous trip threshold value, and nobody moves release immediately for time-delay.Because overload repeatedly may cause the conductor heating, release also should have hot memory function.Controller enters overload, short time delay and recovers normal after not reaching the dropout energy, and after this overload energy should discharge at about 30min and finish, and promptly have the thermal effect of simulated dual sheet metal characteristic, (the short time delay specified time does not have the heat memory).Reset and to remove the heat memory.(3) in the intelligent electrical apparatus release of the present invention, current detecting is nursed one's health the unit by sampling resistor, filtering, and amplifying circuit is formed, and CPU is made up of the low-power scm PIC16F877A and the peripheral electronic circuitry thereof that carry 10 bit A/D converters.(4) when work, the authigenic power supply circuit is converted into the electric current that current transformer flows into+8V, and+5V level is the system stability power supply.Single-chip microcomputer is to carrying out the AD conversion by the voltage signal of current transformer after current detecting conditioning cell processing; And carry out logical operation and processing according to sampled value; operation result and setting value relatively back output meet the logic level signal of presetting protective feature; these signals are sent into the magnetic flow convertor in the dropout performance element behind the dropout drive circuit, make circuit breaker trip, cut off circuit.(5) operating current of various error protections and time setting value are set by dial, and can make amendment in real time in application.Under minimum electric current input condition, authigenic power supply can not provide system's normal working voltage, by low level detecting unit automatic clear single-chip microcomputer.
Description of drawings
For the easier quilt of content of the present invention is clearly understood, below the specific embodiment and in conjunction with the accompanying drawings of basis, the present invention is further detailed explanation, wherein
Fig. 1 is the circuit block diagram of the intelligent electrical apparatus release among the embodiment;
Fig. 2 is the low level detecting unit of the intelligent electrical apparatus release among the embodiment and the schematic diagram of authigenic power supply circuit.
Embodiment
See Fig. 1-2, the intelligent electrical apparatus release of present embodiment comprises: current transformer 2, the current detecting conditioning unit 3 that links to each other with the induced current output of current transformer 2, the central control unit 1 that links to each other with the signal output part of current detecting conditioning unit 3, the dropout drive circuit 11 that links to each other with the dropout control signal output ends of central control unit 1, the dropout performance element 12 that links to each other with the output of dropout drive circuit 11.Described current transformer 2 also is connected with authigenic power supply circuit 7, and the power output end of authigenic power supply circuit 7 links to each other with central control unit 1 through low level detecting unit 6.
Authigenic power supply circuit 7 comprises filter circuit (comprising: capacitor C 6 that is in parallel and resistance R 7, the capacitor C 5 that is in parallel and resistance R 6, the capacitor C 4 that is in parallel and resistance R 5) and rectification circuit B1, B2 and the B3 that contacts with the current output terminal of current transformer 2, and the positive pole of rectification circuit links to each other with the power end of central control unit 1 and the power end of low level detecting unit 6 through voltage stabilizing circuit.
Low level detecting unit 6 comprises: the metal-oxide-semiconductor M1 that the d utmost point links to each other with the positive pole of rectification circuit, the s utmost point of metal-oxide-semiconductor M1 connects the negative pole of rectification circuit, the positive pole of rectification circuit is connected in series the backward end that meets comparator U1 behind the first current-limiting resistance R1, be provided with the second current-limiting resistance R2 and the 3rd current-limiting resistance R3 of series connection between the positive and negative electrode of rectification circuit, the contact of the second current-limiting resistance R2 and the 3rd current-limiting resistance R3 links to each other with the end in the same way of comparator U1, the g utmost point of the output termination metal-oxide-semiconductor M1 of comparator U1, the g utmost point of metal-oxide-semiconductor M1 also links to each other with the power supply control output end of central control unit 1; Be provided with first capacitor C 1 and the first voltage stabilizing didoe DZ1 in parallel between the backward end of comparator U1 and the negative pole of rectification circuit, be provided with the electrochemical capacitor C2 and the second voltage stabilizing didoe DZ2 in parallel between the positive and negative electrode of rectification circuit.The output of described comparator U1 is connected in series the 4th current-limiting resistance and links to each other with the current input terminal of described voltage stabilizing circuit, the 3rd capacitor C 3 that filtering is used between the g of the metal-oxide-semiconductor M1 utmost point and the s utmost point.
When just powering on, because the g utmost point of metal-oxide-semiconductor M1 and the voltage difference U gs between the s utmost point are zero, the electric current I ds between the d utmost point and the s utmost point is zero, and electric current produces a voltage drop by the second current-limiting resistance R2 and the 3rd current-limiting resistance R3; When the input current of current transformer 2 hour, the current potential of the backward end of comparator U1 is higher than end in the same way, comparator is output as zero, be that described Ugs is zero, metal-oxide-semiconductor M1 closes, the electric current of the positive pole output of rectification circuit gives central control unit 1 power supply through voltage stabilizing circuit, gives electrochemical capacitor C2 charging simultaneously; When the input current of current transformer 2 becomes big, because backward end its voltage under the effect of the first voltage stabilizing didoe DZ1 of comparator U1 is constant, and the voltage that it is held in the same way is big and increase along with the change of described input current, cause the output voltage of comparator U1 to become positive level, and described Ugs is higher than the threshold voltage of metal-oxide-semiconductor M1, metal-oxide-semiconductor M1 conducting, and the d utmost point of metal-oxide-semiconductor M1 and the voltage difference U ds between the s utmost point drop to zero, at this moment, electrochemical capacitor C2 discharge afterflow is central control unit 1 power supply.
Along with the decline of voltage U ds, the voltage of end in the same way of comparator U1 descends thereupon, and the output voltage of comparator U1 is zero once more, and metal-oxide-semiconductor M1 closes once more, and so forth.
Wherein, less when the input current of current transformer 2, and the voltage at electrochemical capacitor C2 two ends is when being lower than the operate as normal value, and central control unit 1 is cleared and quits work.
The parameter control input end of described central control unit 1 is connected with setting value input unit 8, and the communication data end of central control unit 1 is connected with the serial communication interface 4 that is used to connect host computer 5.
Described dropout drive circuit 11 has the signal input end that is used to connect off-line trip unit 10.The status signal output of described central control unit 1 is connected with status indicator lamp 9.
Described current transformer 2 also is connected with authigenic power supply circuit 7, and the power output end of authigenic power supply circuit 7 links to each other with central control unit 1 through low level detecting unit 6.
The PIC16F877A single-chip microcomputer adopts Harvard's bus structures, program counter is 13 bit wides, the FLASH program's memory space of maximum addressable 8K * 14, can preserve complicated release program, the data storage that also has 368K, the EEPROM of 256K, program storage adopts different buses with data storage, therefore can carry out the speed that access has improved system to program storage and data storage simultaneously; In addition, the PIC16F877A single-chip microcomputer has 14 interrupt sources, has comprised the interruption of interruption, timer of peripheral function and external interrupt etc., 8 grades of hardware stacks; The 5V single-voltage-supply cmos, programming is convenient, only needs with two pin on-line debuggings; Can be in voltage range work (2.0V-5.5V) than broad, and at the 4MHz clock, during the 5V supply voltage, the exemplary operation current value does not need authigenic power supply to draw a lot of energy from the prime instrument transformer and gets final product work less than 2mA.
In peripheral functional modules, PIC16F877A single-chip microcomputer chip integration has become 10 A/D converters, has 8 A/D analog input channels; TMR0 (8), TMR1 (16), three timers of TMR2 (8); Two seizure/comparison/pulse width modulation modules, wherein 16 ultimate resolutions of catching input are 12.5ns, and the ultimate resolution of 16 bit comparisons input is 200ns, and the ultimate resolution of pulse-width modulation (PWM) output is 10; Also have synchronous serial interface (SSP) can satisfy SPI and I in addition
2The requirement of C bus, Universal Synchronous Asynchronous Receiver Transmitter (USART), and parallel driven port PSP can satisfy the needs of serial parallel communication.In a word, peripheral functional module can reduce to greatest extent or exempt to use external device, under the prerequisite that guarantees systemic-function, reduces the cost of release design.
Intelligent electrical apparatus release is converted into voltage signal through forward path with the current signal that collects after gathering electric current by current transformer from major loop, and sending into A/D converter is digital signal with analog signal conversion.Single-chip microcomputer utilizes this digital signal to calculate, judge and operate, and the control release moves, thereby finishes the different protective features to the different faults electric current.These different functions are to realize by following protection algorithm.
1. overload long delay current protection
Inverse time characteristic, that is: I are adopted in the protection of overload long delay
2T
L=(I
c)
2t
L, error ± 10%, wherein I
cSpecify in advance, can be 1.5I
R1, 2.0I
R1, 6.0I
R1, the t during panel is set
LIt is exactly corresponding delay time.This part protection must guarantee system power I≤1.05I
R1, be failure to actuate I 〉=1.30I in＞2 hours
R1To move in＜1 hour.Setting value t
LThe discrete setting.
The long delay current protection has the energy memory function, and the energy memory refers in the time range of setting, if exceed the energy I of normal range (NR)
2T
LAdding up surpasses the setting value of overload long delay, then is judged to system overload, needs to thread off immediately, otherwise is considered to not reach overload condition.The energy memory needs to set the time range of energy memory.In this time range, energy I
2T
L(surpassing normal value) accumulation always.Consider in these software systems that the energy memory is exactly stable and interference free performance for the protection algorithm that improves system.When surpassing setting value, the sample rate current effective value starts the energy memory function.
2. short circuit short time delay current protection
In general, short time delay protection refers to that line current surpasses setting value, circuit disconnection behind the special time of just will delay time, the short time delay in native system protection adopted the inverse time lag+implementation method of specified time.
The inverse time characteristic of short time delay protection: I
2T
L=(I
d)
2t
L, panel is set t
sBe 8I
LThe time the short time delay time, be called the general short time delay time, as I＞8I
LThe time, transfer difinite-time limit characteristic automatically to.
Short time delay in native system protection adopted the inverse time lag+implementation method of specified time, can improve the protection accuracy of release greatly, be convenient to realize the coordination that the utmost point is up and down protected.
Short time delay has also adopted the energy memory function, realizes that principle is the same.
3. wink streaming current protection
At first for moving algorithm of wink, when electric current surpasses certain value, wish section breaker electrical equipment immediately, the disengagement failure source avoids fault coverage to enlarge.Its basic way is exactly to judge whether the current effective value of this calculating surpasses the set point of wink streaming current, if then send sub-gate signal immediately.But will pass through 20ms because the actual monitored unit calculates the effective value of primary current, if electric current during above the set point of transient current, release can not satisfy the requirement of real-time operate time, and this is unallowed in breaker of plastic casing.Usually adopt the effective value computational methods of " three get two " method or " window moves " to improve the real-time and the antijamming capability of moving protection of wink.
" window moves " ratio juris can be used following formulate:
In the formula, I
2The current effective value of n sampled point before the expression current time rises, n some root-mean-square value before promptly lighting, i from this
m(m=1,2 ... n) be each current sampling data of last cycle, i
m(m=1,2 ... n) be each current sampling data of this cycle.
With calculating income value I
2With wink the streaming current set point relatively judge whether to send trip signal.This algorithm can reflect the variation of electric current in real time, and suitable accumulative total effect is arranged again, can not thread off because of a burr of electric current, can reduce even avoid the generation of maloperation situation.In this algorithm, the length of window shortening can be quickened to judge, but reliability can decrease, so can choose suitable length of window according to the actual techniques index request.
Table 1 adopts the operate time of three kinds of different winks moving protection algorithm under two kinds of short-circuit conditions for circuit breaker.
As can be seen from Table 1, when being short-circuited electric current, adopt 3 moving window method, the time that detects short circuit current is the shortest, so this software will adopt 3 moving window method to move the protection algorithm the most wink.
4. energy memory principle
Because overload repeatedly may cause that conductor generates heat repeatedly, release also should have hot memory function.Controller enters overload, short time delay and recovers normal after not reaching the dropout energy, and after this overload energy should discharge at about 30min and finish, and promptly have the thermal effect of simulated dual sheet metal characteristic.
The present invention can effectively realize long delay, the short time delay inverse time lag, and the short time delay specified time, wink is moved four segment protects, and big arriving than higher experimental precision has real-time input setting value simultaneously, and low level detects, functions such as off-line dropout; Simultaneously, compactness of the present invention, with low cost, have interference free performance, caloric value is low, can realize large-scale batch process, has higher use value.
The foregoing description only is for example of the present invention clearly is described, and is not to be qualification to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all execution modes.And these belong to conspicuous variation or the change that spirit of the present invention extended out and still are among protection scope of the present invention.
Claims (7)
1, a kind of intelligent electrical apparatus release is characterized in that comprising: current transformer (2), the current detecting conditioning unit (3) that links to each other with the induced current output of current transformer (2), the dropout performance element (12) of nursing one's health the central control unit (1) that the signal output part of unit (3) links to each other, the dropout drive circuit (11) that links to each other with the dropout control signal output ends of central control unit (1), linking to each other with the output of dropout drive circuit (11) with current detecting; Described current transformer (2) also is connected with authigenic power supply circuit (7), and the power output end of authigenic power supply circuit (7) links to each other with central control unit (1) through low level detecting unit (6);
Authigenic power supply circuit (7) comprises the filter circuit and the rectification circuit of contacting with the current output terminal of current transformer (2), and the positive pole of rectification circuit links to each other with the power end of central control unit (1) and the power end of low level detecting unit (6) through voltage stabilizing circuit;
Low level detecting unit (6) comprising: the metal-oxide-semiconductor (M1) that the d utmost point links to each other with the positive pole of rectification circuit, the s utmost point of metal-oxide-semiconductor (M1) connects the negative pole of rectification circuit, the positive pole of rectification circuit is connected in series the backward end that meets comparator (U1) behind first current-limiting resistance (R1), rectification circuit just, be provided with second current-limiting resistance (R2) and the 3rd current-limiting resistance (R3) of series connection between the negative pole, the contact of second current-limiting resistance (R2) and the 3rd current-limiting resistance (R3) links to each other with the end in the same way of comparator (U1), the g utmost point of the output termination metal-oxide-semiconductor (M1) of comparator (U1), the g utmost point of metal-oxide-semiconductor (M1) also link to each other with the power supply control output end of central control unit (1); Be provided with first electric capacity (C1) and first voltage stabilizing didoe (DZ1) in parallel between the backward end of comparator (U1) and the negative pole of rectification circuit, be provided with electrochemical capacitor (C2) and second voltage stabilizing didoe (DZ2) in parallel between the positive and negative electrode of rectification circuit.
2, intelligent electrical apparatus release according to claim 1, it is characterized in that: when just powering on, because the g utmost point of metal-oxide-semiconductor (M1) and the voltage difference U gs between the s utmost point are zero, electric current I ds between the d utmost point and the s utmost point is zero, and electric current produces a voltage drop by second current-limiting resistance (R2) and the 3rd current-limiting resistance (R3); When the input current of current transformer (2) hour, the current potential of the backward end of comparator (U1) is higher than end in the same way, comparator is output as zero, be that described Ugs is zero, metal-oxide-semiconductor (M1) is closed, the electric current of the positive pole output of rectification circuit is given central control unit (1) power supply through voltage stabilizing circuit, gives electrochemical capacitor (C2) charging simultaneously; When the input current of current transformer (2) becomes big, because backward end its voltage under the effect of first voltage stabilizing didoe (DZ1) of comparator (U1) is constant, and the voltage that it is held in the same way is big and increase along with the change of described input current, cause the output voltage of comparator (U1) to become positive level, and described Ugs is higher than the threshold voltage of metal-oxide-semiconductor (M1), metal-oxide-semiconductor (M1) conducting, the d utmost point of metal-oxide-semiconductor (M1) and the voltage difference U ds between the s utmost point drop to zero, at this moment, electrochemical capacitor (C2) discharge afterflow is central control unit (1) power supply;
Along with the decline of voltage U ds, the voltage of end in the same way of comparator (U1) descends thereupon, and the output voltage of comparator (U1) is zero once more, and metal-oxide-semiconductor (M1) is closed once more, and so forth.
3, intelligent electrical apparatus release according to claim 2 is characterized in that: less when the input current of current transformer (2), and the voltage at electrochemical capacitor (C2) two ends is when being lower than the operate as normal value, and central control unit (1) is cleared and quits work.
4, intelligent electrical apparatus release according to claim 3, it is characterized in that: the output of described comparator (U1) is connected in series the 4th current-limiting resistance and links to each other with the current input terminal of described voltage stabilizing circuit, the 3rd electric capacity (C3) that filtering is used between the g utmost point of metal-oxide-semiconductor (M1) and the s utmost point.
5, intelligent electrical apparatus release according to claim 4, it is characterized in that: the communication data end of central control unit (1) is connected with the serial communication interface (4) that is used to connect host computer (5), and the parameter control input end of central control unit (1) is connected with setting value input unit (8).
6, intelligent electrical apparatus release according to claim 5 is characterized in that: described dropout drive circuit (11) has the signal input end that is used to connect off-line trip unit (10).
7, intelligent electrical apparatus release according to claim 6 is characterized in that: the status signal output of described central control unit (1) is connected with status indicator lamp (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910162292A CN101615778A (en) | 2009-08-03 | 2009-08-03 | Intelligent electrical apparatus release |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910162292A CN101615778A (en) | 2009-08-03 | 2009-08-03 | Intelligent electrical apparatus release |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101615778A true CN101615778A (en) | 2009-12-30 |
Family
ID=41495256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910162292A Pending CN101615778A (en) | 2009-08-03 | 2009-08-03 | Intelligent electrical apparatus release |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101615778A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101984531A (en) * | 2010-11-29 | 2011-03-09 | 东莞市开关厂有限公司 | Five-part type terminal protective device of power distribution monitoring system |
| CN102368603A (en) * | 2010-06-30 | 2012-03-07 | 伊顿公司 | Apparatus for indicating a status of an apparatus that energizes a protective device, and associated method |
| CN102568940A (en) * | 2010-12-15 | 2012-07-11 | 上海良信电器股份有限公司 | Low voltage operation delay protection drive circuit |
| CN104600847A (en) * | 2015-02-12 | 2015-05-06 | 金思思 | Intelligent switch |
| CN105448613A (en) * | 2014-08-15 | 2016-03-30 | 施耐德电气工业公司 | Release used for breaker |
| CN104578400B (en) * | 2013-10-24 | 2017-12-12 | 陈锦清 | A kind of distributor breaker intelligent protection device and method |
| CN109245025A (en) * | 2018-10-16 | 2019-01-18 | 常熟开关制造有限公司(原常熟开关厂） | Trip circuit, trip gear, breaker |
| CN111446703A (en) * | 2020-04-29 | 2020-07-24 | 柳州海格电气股份有限公司 | Method and device for molded case circuit breaker based on intelligent Internet of things |
-
2009
- 2009-08-03 CN CN200910162292A patent/CN101615778A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102368603A (en) * | 2010-06-30 | 2012-03-07 | 伊顿公司 | Apparatus for indicating a status of an apparatus that energizes a protective device, and associated method |
| CN101984531A (en) * | 2010-11-29 | 2011-03-09 | 东莞市开关厂有限公司 | Five-part type terminal protective device of power distribution monitoring system |
| CN102568940A (en) * | 2010-12-15 | 2012-07-11 | 上海良信电器股份有限公司 | Low voltage operation delay protection drive circuit |
| CN102568940B (en) * | 2010-12-15 | 2016-01-27 | 上海良信电器股份有限公司 | The delay protection drive circuit of low voltage operating |
| CN104578400B (en) * | 2013-10-24 | 2017-12-12 | 陈锦清 | A kind of distributor breaker intelligent protection device and method |
| CN105448613A (en) * | 2014-08-15 | 2016-03-30 | 施耐德电气工业公司 | Release used for breaker |
| CN104600847A (en) * | 2015-02-12 | 2015-05-06 | 金思思 | Intelligent switch |
| CN109245025A (en) * | 2018-10-16 | 2019-01-18 | 常熟开关制造有限公司(原常熟开关厂） | Trip circuit, trip gear, breaker |
| CN109245025B (en) * | 2018-10-16 | 2024-05-10 | 常熟开关制造有限公司(原常熟开关厂） | Tripping circuit, tripping device and circuit breaker |
| CN111446703A (en) * | 2020-04-29 | 2020-07-24 | 柳州海格电气股份有限公司 | Method and device for molded case circuit breaker based on intelligent Internet of things |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101615778A (en) | Intelligent electrical apparatus release | |
| CN101615855A (en) | The power circuit of intelligent electrical apparatus release | |
| CN201830014U (en) | Switching control device for main and standby power sources | |
| CN100563080C (en) | The method of main power supply switching controls and device | |
| CN102790378A (en) | Intelligent motor protector and protection method thereof | |
| CN107834977A (en) | A kind of photovoltaic module intelligent wiring box and its control method | |
| CN101447660B (en) | Automatic reclosing controller of general low-voltage circuit breaker | |
| CN217954698U (en) | Broken wire detection circuit | |
| CN104467040A (en) | Vehicle-mounted uninterruptible power supply (UPS) storage battery control and management device | |
| CN109991535A (en) | A kind of flash on-off control system and its input flash detection circuit | |
| CN107171401A (en) | A kind of pair of accessory power supply and the energy-storage system based on double accessory power supplys | |
| CN201533148U (en) | Intelligent plastic-shell breaker tripper circuit | |
| CN201204725Y (en) | Intelligent switch controller for solar street lamp | |
| CN101456362A (en) | Control circuit for intelligent electric vehicle controller | |
| CN101447661B (en) | Control method for automatic reclosing controller | |
| CN201479022U (en) | Power supply circuit of intelligent electrical apparatus release | |
| WO2017152814A1 (en) | Circuit-breaker controller and control method | |
| CN205427522U (en) | Circuit breaker controller | |
| CN201478234U (en) | Intelligent tripper | |
| CN204189728U (en) | A kind of functional module of circuit breaker and circuit breaker | |
| CN201191761Y (en) | Current protection control device in 24kV vacuum circuit breaker | |
| CN209119865U (en) | A kind of multi-series lithium battery hardware short-circuit protection circuit | |
| CN204046218U (en) | A kind of energy-saving elevated piezoelectric battery circuit | |
| CN206894301U (en) | A kind of double accessory power supplys and the energy-storage system based on double accessory power supplys | |
| CN207426660U (en) | Buckle releaser and breaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20091230 |