CN102983562A - Current-limiting protector for electrical fire prevention - Google Patents
Current-limiting protector for electrical fire prevention Download PDFInfo
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- CN102983562A CN102983562A CN2012105456825A CN201210545682A CN102983562A CN 102983562 A CN102983562 A CN 102983562A CN 2012105456825 A CN2012105456825 A CN 2012105456825A CN 201210545682 A CN201210545682 A CN 201210545682A CN 102983562 A CN102983562 A CN 102983562A
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Abstract
The invention provides a current-limiting protector for electrical fire prevention, which comprises a current transformer unit, a detecting unit, a microprocessor unit and a master control switch unit, wherein the current transformer unit is used for detecting alternating current in a main circuit in real time and outputting a corresponding current signal in an inductive manner; the detecting unit is used for collecting, preprocessing and outputting the current signal; the microprocessor unit is used for processing the current signal and a working temperature signal in a machine, presetting a segmentation delay parameter and a superheating temperature parameter and judging the received preprocessed current signal as short-circuit current or overload current to output a rapid breaking instruction or to carry out a segmentation delay current-limiting instruction respectively; and the master control switch unit connected with the current transformer unit, the microprocessor unit and a load and used for switching on and off the main circuit according to a received control instruction of the microprocessor unit. The current-limiting protector can avoid the continuous increase of the short-circuit current effectively due to a rapid current-limiting protection function and can prevent fires caused by the heating, fusion and burning of wires and an electrical spark generated at a short circuit part.
Description
Technical field
The invention belongs to electric and electronic class emergency protection circuit device for electric, relate in particular to a kind of electric fireproof current-limiting type protector.
Background technology
In the fire that electrical circuit fault causes, because of the fire that short circuit and overload current fault cause particularly outstanding.So-called circuit overloads electric current refers to that the electric current in the circuit exceeds rated operational current, and long-time mistake fails to be convened for lack of a quorum and causes electric wire heating, fusing and burning even the fault that is short-circuited.In case and circuit is short-circuited, the electric current in the circuit will sharply increase, and causes short circuit place energy to increase sharply, considerably beyond the tolerance limit of electric wiring, so that electric wire generates heat, burns and because electric spark initiation fire occurs in short circuit place.
The various fireproof alarming watch-dogs that use in the market generally have the functions such as residual current detection, overcurrent and short-circuit protection, smog, flame alarm and protection, and the most electromagnetic trip formula circuit breakers that adopt of its governor circuit shearing device are carried out the disjunction protection.These electromagnetic trip formula circuit breakers are owing to the defective of itself, so that existing fire monitor has the following disadvantages:
1. shortage capability of fast response: self there is the slow problem of movement velocity that disconnects fully in electromagnetic trip formula circuit breaker in switching process, and there are electric discharge phenomena, be referred to as arcing, therefore the switching time of electromagnetic trip formula circuit breaker is generally all at Millisecond even longer, when short trouble occurring, existing fire monitor lacks the ability of quick disjunction, often have little time the fast shut-off circuit, cause the instantaneous rapid increase of short circuit current, surpass more than tens times of rated operational current, thereby cause the electric wire heating, fusing or burning can produce short-circuit spark and cause fire.
2. existing fire monitor lacks real-time current-limiting function: though can detect the faults such as residual current, overcurrent, short circuit, overtemperature, smog, flame, but when if this dangerous maximum fault of electric wiring short circuit occurs, existing fire monitor is owing to lack the fast ability of control, immediately the expansion of limiting short-circuit current, thus so that sharply increasing, short circuit current produces electric spark initiation fire.
3. be confined to post-event alarm: existing fire monitor is because break-time is long, even if found short trouble, but slow because of its system response speed, can only rest on the post-event alarm of fire.The spray system though some fire monitor has linked, also fire putting out a fire to save life and property afterwards just.
4. short poor reliability of life-span: existing fire monitor is owing to adopt electromagnetic breaker to carry out the disjunction protection; the mechanical contact of electromagnetic trip formula circuit breaker can produce shake and arcing when switch motion; this can aggravate the oxidation of contact surface; increase contact resistance and come in contact bad fault; arcing ablation contact even melting can appear; shorten the life-span of circuit breaker, caused purpose of breaker failure.
5. there is disaster hidden-trouble in contact arching: existing fire monitor adopts electromagnetic breaker to carry out the disjunction protection, and its contact arc quenching effect is poor, can produce arcing, is easy to the combustibles that ignite, thereby has disaster hidden-trouble.
For this reason, a kind of solid-state switch is proposed again in the prior art, reverse-blocking tetrode thyristor for example, because reverse-blocking tetrode thyristor does not produce arcing in switching process, utilize reverse-blocking tetrode thyristor to substitute electromagnetic trip formula circuit breaker, can solve the intrinsic problem of electromagnetic trip formula circuit breaker, realize contactlessly without arcing switch control, prolong switch useful life.But reverse-blocking tetrode thyristor still is a millisecond rank owing to self still having the slow-footed defective of switching process, response speed, when electric short circuit occurs, still has little time the fast shut-off circuit, causes short circuit current to increase until initiation fire rapidly.In addition, also there is the tube voltage drop of 1-2V in reverse-blocking tetrode thyristor, therefore has the large problem of oneself power consumption.
Therefore, the electric fireproof watch-dog of present prior art, though can detect the faults such as electric short circuit, circuit overloads, electric leakage, smog and high temperature, be confined to fault later post-event alarm and control occur, can't in time suppress instant generation and the expansion of electrical fire.
Summary of the invention
The object of the present invention is to provide a kind of electric fireproof current-limiting type protector; in order to can be connected in the electric wiring between electric branch switch and the electrical appliance; current failure and carry out Microsecond grade current-limiting protection in can the Real-Time Monitoring electric wiring suppresses the appearance of electric short circuit spark.
In order to address the above problem, the invention provides a kind of electric fireproof current-limiting type protector, comprising:
One current transformer unit, described current transformer unit detect alternating current and current signal corresponding to induction output in the major loop in real time;
One detecting unit, the described current signal of described detecting unit Real-time Collection also carries out described current signal preliminary treatment and exports pretreated current signal;
One microprocessor unit, described microprocessor unit is preset the fragment delay parameter, process described pretreated current signal and judgement when the pretreated described current signal of the process that receives is overload current, carry out the instruction of segment delay current limliting, when the pretreated described current signal of the process that receives is short circuit current, export quick disjunction instruction;
One master switch unit, described master switch unit is connected with described current transformer unit, described microprocessor unit and the load of, connection and the section breaker action of major loop are carried out according to the control command of the described microprocessor unit that receives in described master switch unit.
Further, described overload current is the alternating current that is not less than rated operational current and is not more than the short trouble threshold value; Described short circuit current is for greater than the short trouble threshold value and rapidly increase to alternating current more than the rated operational current several times.
Preferably, described microprocessor unit during greater than described short trouble threshold value, is exported described quick disjunction instruction according to described current signal corresponding to the short circuit current that receives.
Preferably, described microprocessor unit compares according to size and the described default fragment delay parameter of described current signal corresponding to the overload current that receives, to form corresponding segment delay current limliting instruction.
Further, described master switch unit comprises: many groups solid switch module in parallel, and every group of solid switch module passed through the source series formation of two MOSFET pipes;
Input and the output of the head and the tail drain electrode master switch unit that forms respectively in parallel of the MOSFET pipe by two series connection in every group of solid switch module, the input of described master switch unit are connected with output with described current transformer unit and are connected with load;
The link to each other control end of the master switch unit that forms of grid by two MOSFET pipes in every group of solid switch module, the control end of described master switch unit is connected with microprocessor unit.
Further, the default overtemperature parameter of described microprocessor unit.
Preferably; described electric fireproof current-limiting type protector also comprises a temperature sensor unit; the working temperature that collects on the solid switch module of described temperature sensor unit with described many group parallel connections is changed into by described detecting unit and outputs to described microprocessor unit in the machine behind the working temperature signal; if output overtemperature prote instruction when the working temperature signal is greater than the overtemperature parameter in the described machine that described microprocessor unit receives is carried out overtemperature disjunction current-limiting protection to control described master switch unit.
Preferably, described electric fireproof current-limiting type protector also comprises an alarm unit, when described alarm unit detects fault when described detecting unit, exports an alarm signal by described microprocessor unit and carries out sound and light alarm to control described alarm unit.
Preferably, described electric fireproof current-limiting type protector also comprises a communication unit, and described communication unit is controlled by described microprocessor unit to be realized communicating by letter with the remote connection of host computer.
Preferably, described electric fireproof current-limiting type protector also comprises an accessory power supply unit, to provide stable operating voltage to each unit that is connected with electric fireproof current-limiting type protector.
As seen from the above technical solution, the present invention compared with prior art has following beneficial effect:
When short trouble occurring, electric fireproof current-limiting type protector of the present invention can be realized the quick current-limiting protection with Microsecond grade speed, so that the fast rise of short circuit current is limited within the scope of rated operational current several times, thereby effectively eliminate because of the caused electric spark of short circuit current the hidden danger of prevention and minimizing electrical fire; When the overload current fault occurring, electric fireproof current-limiting type protector also can be realized the current-limiting protection of overload current fault.Because electric fireproof current-limiting type protector adopts the high speed current detection technology, when electric wiring increased severely because of short circuit generation transient current, the energy fast detecting was also carried out current-limiting protection, and its control remolding sensitivity normal circuit breaker improves thousands of times.
In addition, because electric fireproof current-limiting type protector of the present invention can be realized quick disjunction current-limiting protection when being short-circuited fault, therefore can when short trouble occur, in time carry out fire and report to the police in advance.
And, to use the connection in series-parallel of high performance MOSFET pipe and form the master switch unit, it is simple in structure, is easy to extend current.Simultaneously, the master switch unit that the high performance MOSFET pipe forms has fundamentally overcome traditional fuse, the defective of circuit breaker as solid state switch, has no-spark, switching speed is fast, the life-span is long, power consumption is little advantage.
In addition, electric fireproof current-limiting type protector can also be realized the current-limiting protection of internal body overtemperature fault, and realizes the functions such as sound and light alarm, parameter are preset, remote connection monitoring, effectively the protection safety of electric line.Wherein, the remote connection monitoring technique can be realized the multimachine networking monitoring, can network with the fire fighting monitoring platform, can real time record store data, can carry out data statistics, inquires about and review.
Also have, adopt high-performance microprocessor, the data that electric circuit is moved realize real-time centralized monitor, are convenient to realize intelligent management.
Description of drawings
Fig. 1 is the system block diagram schematic diagram of electric fireproof current-limiting type protector of the present invention;
Fig. 2 is the circuit diagram of master switch unit;
Fig. 3 is energy and the time relationship schematic diagram before and after prior art and the short trouble of the present invention.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with accompanying drawing the specific embodiment of the present invention is described in detail.
A lot of details have been set forth in the following description so that fully understand the present invention.But the present invention can implement much to be different from alternate manner described here, and those skilled in the art can do similar popularization in the situation of intension of the present invention, so the present invention is not subjected to the restriction of following public implementation.
Referring to Fig. 1, the invention provides a kind of electric fireproof current-limiting type protector, comprising:
Detecting unit 2, described detecting unit 2 is connected with described current transformer unit 1, described detecting unit 2 is used for the current signal Isingal that Real-time Collection is transmitted by described current transformer unit 1, and described current signal Isingal is carried out preliminary treatment and exports pretreated current signal.Wherein, described detecting unit 2 has high-speed response, high sensitivity and high Precision Processing ability, can satisfy system requirements;
Microprocessor unit 3, described microprocessor unit 3 is connected with described detecting unit 2, described microprocessor unit 3 is used for default fragment delay parameter, process described pretreated current signal, and when the pretreated described current signal Isingal of process that receives described detecting unit 2 outputs is short circuit current Ishort, export quick disjunction instruction; When the pretreated described current signal Isingal of process that receives described detecting unit 2 outputs is overload current Iover, carry out the instruction of segment delay current limliting.Wherein, described overload current Iover is the alternating current that is not less than rated operational current and is not more than the short trouble threshold value.And described short circuit current Ishort is greater than the short trouble threshold value and rapidly increases to the above alternating current I of rated operational current several times (being generally 6-8 doubly).Concrete, described microprocessor unit 3 is selected the high-performance microprocessor with high speed processing ability, the current signal Isingal that described microprocessor unit 3 is corresponding with the alternating current flow valuve that described detecting unit 2 collects calculates fast and analyzes, and according to the size of described alternating current I, distinguish overload current Iover or short circuit current Ishort, when judging when being short circuit current Ishort, according to the command request of programming, export quick disjunction instruction; When judging when being overload current Iover; also need and to flow through being not less than rated operational current and being not more than the overload current Iover that alternating current I between the described short trouble threshold value is segmented into different sizes on the electric wiring; as: surpass 1.5 times of rated operational currents with interior overload current Iover; or surpass 1.5 times of rated operational currents less than the overload current Iover between the described short trouble threshold value; or the overload current Iover that forms of other scope segmentations etc.; and with the overload current Iover and the described default fragment delay parameter comparison that detect; to form corresponding segment delay current limliting instruction; and carry out corresponding segment delay current-limiting protection, guarantee occur such as the short time such as motor starting during large electric current not by too fast current limliting.
Concrete, described master switch unit 4 adopts high performance MOSFET to form the electronic type solid-state switch, its circuit structure as shown in Figure 2, described master switch unit comprises: many groups solid switch module Swit in parallel, every group of solid switch module Swit connects by the source S of two MOSFET pipes and forms, input In and the output Out of the master switch unit that the head and the tail drain D parallel connection of the MOSFET pipe by two series connection among every group of solid switch module Swit forms respectively, and the link to each other control end Con of the master switch unit 4 that forms of the grid G by two MOSFET pipes among every group of solid switch module Swit, wherein, the input In of described master switch unit, output Out and control end Con respectively with described current transformer unit 1, connection is connected in load with microprocessor unit.Control the size of its grid voltage by the control end Con of described master switch unit 4 from the switching signal of described microprocessor unit 3 outputs, realize the variation of MOSFET pipe inner conductive channel width, finally reach conducting and the shutoff of the described master switch of control unit 4.As from the foregoing, master switch provided by the invention unit has successfully solved withstand voltage, the expansion of operating current of electronic type solid-state switch, the key technologies such as reduction of tube voltage drop: it is fast that this electronic type solid-state switch has switching speed, can satisfy the Microsecond grade switching speed; MOSFET pipe conducting state tube voltage drop is low, and tube voltage drop can be less than 0.5V during rated current work, so the pipe power consumption is little; All solid state noncontacting switch, itself is arcing, spark appearance absolutely not, and switch life is long; Adopt the simple in structure of a plurality of MOSFET pipe connection in series-parallel formation of solid polycomplex switch modules, control is convenient.Therefore, the solid-state master switch of the electronics unit that the present invention proposes can satisfy the requirement of supper-fast current-limiting protection.
Be illustrated in figure 3 as energy and the time relationship schematic diagram of prior art and short trouble of the present invention front and back; the a point is the short trouble origination point; the b point is for installing the time point that turn-offs the master switch unit behind the electric fireproof current-limiting type protector of the present invention additional; the c point is for installing behind the existing fire monitor maximum short circuit current with instantaneous rapid increase in the electric line additional, and d point has the time point that switch cuts off fully behind the fire monitor now for installing additional.When short trouble when a point occurs, because existing fire monitor is after short circuit current occurs, its response speed is slow, turn-off control even if make, still can cause short circuit current sharply to be increased to c point maximum, until the d point is just closed fully, the energy that short trouble discharges is huge, and short-circuit point can produce strong electric spark.And electric fireproof current-limiting protector of the present invention can make and is limited in rapidly in the setting value scope that sets in advance when the rising of b point short circuit current, thereby described electric fireproof current-limiting type protector can be realized the quick current-limiting protection of fault current in 150 microseconds, so that the energy Ratios traditional relay protection mode that short trouble discharges is decreased to thousand times of minorities, short-circuit point can not produce spark, thereby effectively eliminate because of the caused electrical fire of short circuit current the hidden danger of prevention and minimizing electrical fire; When the overload current fault occurring, electric fireproof current-limiting type protector also can be realized the segment delay current-limiting protection of overload current fault.Simultaneously, electric fireproof current-limiting type protector adopts high speed high-sensitivity detection technology, when increasing severely because of short circuit generation transient current on electric wiring, can fast detecting also carry out current-limiting protection, thousands of times of its control remolding sensitivity normal circuit breaker raisings.In addition, because electric fireproof current-limiting type protector of the present invention can be realized quick disjunction current-limiting protection when being short-circuited fault, therefore can when short trouble occur, in time carry out fire and report to the police in advance.
Further, described microprocessor unit is also preset an overtemperature parameter.For this reason, referring to Fig. 1, described electric fireproof current-limiting type protector provided by the invention also comprises a temperature sensor unit 5.Described temperature sensor unit 5 is connected with detecting unit 2; the working temperature that described temperature sensor unit 5 is used for collecting on will the solid switch module of described many group parallel connections outputs to described microprocessor unit 3 changed into the digital signal of working temperature in the machine by described detecting unit 2 after; described microprocessor unit 3 calculates fast and analyzes according to the overtemperature parameter of working temperature signal and its internal preset in the described machine that receives; judge whether to occur overheating fault; if the described digital signal that receives is during greater than the overtemperature parameter; for described electric fireproof current-limiting type protector inside overtemperature appears then; by described microprocessor unit 3 output overtemperature prote instructions; realize overtemperature disjunction current limliting to control described master switch unit 4, to protect described electric fireproof current-limiting type protector.
Preferably, referring to Fig. 1, described electric fireproof current-limiting type protector provided by the invention also comprises an alarm unit 6.Described alarm unit 6 is connected with microprocessor unit 3, and described alarm unit is used for when described detecting unit 2 detects fault, sends the sound and light alarm signal by the alarm signal of described microprocessor unit 3 outputs to control described alarm unit.
Preferably, referring to Fig. 1, described electric fireproof current-limiting type protector provided by the invention also comprises a communication unit 7.Described communication unit 7 is connected with described microprocessor unit 3, and described communication unit is controlled by described microprocessor unit 3, realizes communicating by letter with the remote connection of host computer.Described communication unit 7 adopts preferably RS-485 serial interface circuit of anti-interferences, and it is long to have a communication distance, and the error rate is low, the advantage that reliability is high.
Preferably, referring to Fig. 1, described electric fireproof current-limiting type protector provided by the invention also comprises an accessory power supply unit 8.By each grade operating voltage of each the unit stable output of described accessory power supply unit 8 in the described electric fireproof current-limiting type protector, to guarantee each unit normal operation in the described electric fireproof current-limiting type protector.Wherein, described each grade working power is insulating power supply, the interference free performance of Effective Raise complete machine.
In addition, electric fireproof current-limiting type protector can also realize controlling the functions such as default, the remote connection monitoring of parameter, and effectively protection is with the use safety of electric line and load (electric equipment).Wherein, the remote connection monitoring technique can be realized the multimachine networking monitoring, can network with the fire fighting monitoring platform, can real time record store data, can carry out data statistics, inquires about and review.
In addition, adopt high-performance microprocessor, realized the embedded intelligence system that hardware, software combine, reliability and the flexibility of system have been improved, its on-line communication interface and monitoring software, data to the electric circuit operation realize the real-time intelligent centralized monitor, are convenient to realize the intelligent management of fireproof monitoring system.
Electric fireproof current-limiting type protector of the present invention can be applied to the place of various easy generation electrical fires; such as school, hospital, ancient building and temple, hotel, public place of entertainment, commodity market and conference and exhibition center, warehouse and factory, also can be used for the fields such as oil, chemical industry, automobile, steamer, aviation.
Each embodiment adopts the mode of going forward one by one to describe in this specification, and what each embodiment stressed is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.For the disclosed system of embodiment, because corresponding with the disclosed method of embodiment, so describe fairly simplely, relevant part partly illustrates referring to method and gets final product.
The professional can also further recognize, unit and the algorithm steps of each example of describing in conjunction with embodiment disclosed herein, can realize with electronic hardware, computer software or the combination of the two, for the interchangeability of hardware and software clearly is described, composition and the step of each example described in general manner according to function in the above description.These functions are carried out with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.The professional and technical personnel can specifically should be used for realizing described function with distinct methods to each, but this realization should not thought and exceeds scope of the present invention.
Obviously, those skilled in the art can carry out various changes and modification to invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these revise and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these change and modification.
Claims (10)
1. electric fireproof current-limiting type protector comprises:
One current transformer unit, described current transformer unit detect alternating current and current signal corresponding to induction output in the major loop in real time;
One detecting unit, the described current signal of described detecting unit Real-time Collection also carries out described current signal preliminary treatment and exports pretreated current signal;
One microprocessor unit, described microprocessor unit is preset the fragment delay parameter, process described pretreated current signal and judgement when the pretreated described current signal of the process that receives is overload current, carry out the instruction of segment delay current limliting, when the pretreated described current signal of the process that receives is short circuit current, export quick disjunction instruction;
One master switch unit, described master switch unit is connected with described current transformer unit, described microprocessor unit and the load of, connection and the section breaker action of major loop are carried out according to the control command of the described microprocessor unit that receives in described master switch unit.
2. electric fireproof current-limiting type protector as claimed in claim 1 is characterized in that, described overload current is the alternating current that is not less than rated operational current and is not more than the short trouble threshold value; Described short circuit current is for greater than the short trouble threshold value and rapidly increase to alternating current more than the rated operational current several times.
3. electric fireproof current-limiting type protector as claimed in claim 2 is characterized in that, described microprocessor unit during greater than described short trouble threshold value, is exported described quick disjunction instruction according to described current signal corresponding to the short circuit current that receives.
4. electric fireproof current-limiting type protector as claimed in claim 2; it is characterized in that; described microprocessor unit compares according to size and the described default fragment delay parameter of described current signal corresponding to the overload current that receives, to form corresponding segment delay current limliting instruction.
5. electric fireproof current-limiting type protector as claimed in claim 1 is characterized in that, described master switch unit comprises: many groups solid switch module in parallel, and every group of solid switch module passed through the source series formation of two MOSFET pipes;
Input and the output of the head and the tail drain electrode master switch unit that forms respectively in parallel of the MOSFET pipe by two series connection in every group of solid switch module, the input of described master switch unit are connected with output with described current transformer unit and are connected with load;
The link to each other control end of the master switch unit that forms of grid by two MOSFET pipes in every group of solid switch module, the control end of described master switch unit is connected with microprocessor unit.
6. electric fireproof current-limiting type protector as claimed in claim 1 is characterized in that, described microprocessor unit is preset an overtemperature parameter.
7. electric fireproof current-limiting type protector as claimed in claim 6; it is characterized in that; also comprise a temperature sensor unit; the working temperature that collects on the solid switch module of described temperature sensor unit with described many group parallel connections is changed into by described detecting unit and outputs to described microprocessor unit in the machine behind the working temperature signal; if output overtemperature prote instruction when the working temperature signal is greater than the overtemperature parameter in the described machine that described microprocessor unit receives is carried out overtemperature disjunction current-limiting protection to control described master switch unit.
8. electric fireproof current-limiting type protector as claimed in claim 1; it is characterized in that; also comprise an alarm unit, when described alarm unit detects fault when described detecting unit, export an alarm signal by described microprocessor unit and carry out sound and light alarm to control described alarm unit.
9. electric fireproof current-limiting type protector as claimed in claim 1 is characterized in that, also comprises a communication unit, and described communication unit is controlled by described microprocessor unit to be realized communicating by letter with the remote connection of host computer.
10. electric fireproof current-limiting type protector as claimed in claim 1 is characterized in that, also comprises an accessory power supply unit, to provide stable operating voltage to each unit that is connected with electric fireproof current-limiting type protector.
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| CN103458570A (en) * | 2013-08-20 | 2013-12-18 | 苏州康华净化***工程有限公司 | Workshop illuminating system |
| CN105826899A (en) * | 2016-05-05 | 2016-08-03 | 杰华特微电子（杭州）有限公司 | Over-temperature protection method and switch circuit with over-temperature protection function |
| CN106505535A (en) * | 2016-11-22 | 2017-03-15 | 四川九洲电器集团有限责任公司 | A kind of transmission line malfunction monitoring method, equipment and system |
| CN107528290A (en) * | 2017-09-29 | 2017-12-29 | 西安华瑞网电设备有限公司 | A kind of inverse time lag current-limiting type electrical fire prevention and control device and method |
| CN107919654A (en) * | 2017-12-14 | 2018-04-17 | 浙江晶科能源有限公司 | The protection circuit and MPPT chips of a kind of excess-current excess-temperature |
| CN109828169A (en) * | 2019-02-01 | 2019-05-31 | 中国矿业大学(北京) | Electric fireproof current-limiting protector electric performance test method, apparatus and system |
| CN112186721A (en) * | 2020-09-30 | 2021-01-05 | 江苏卫川物联科技有限公司 | Electric fire-proof current-limiting protector |
| CN113328418A (en) * | 2021-05-28 | 2021-08-31 | 深圳市中电电力技术股份有限公司 | Current-limiting type electrical fire protector without limit to load type |
| CN117174547A (en) * | 2023-10-23 | 2023-12-05 | 天津北方恒业电气技术有限公司 | Electrical fireproof current-limiting protector module |
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