CN201897627U - Fast-acting fuse detector - Google Patents
Fast-acting fuse detector Download PDFInfo
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- CN201897627U CN201897627U CN201020609993XU CN201020609993U CN201897627U CN 201897627 U CN201897627 U CN 201897627U CN 201020609993X U CN201020609993X U CN 201020609993XU CN 201020609993 U CN201020609993 U CN 201020609993U CN 201897627 U CN201897627 U CN 201897627U
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Abstract
The embodiment of the utility model discloses a fast-acting fuse detector, which comprises a comparison unit and an alarm unit, wherein a shared output end of a plurality of parallel branches in a current transformer arm is connected to a first input end of the comparison unit through a diode; a cathode end of the diode is connected to the first input end of the comparison unit; a preset reference voltage is input by a second input end of the comparison unit; and an output end of the comparison unit is connected to the alarm unit. When the fast-acting fuse in a branch is damaged, the output voltage changes, and then the running state of the fast-acting fuse is judged by comparing the voltage value in the parallel branch with the preset reference voltage; if the parallel output voltage is greater than the preset reference voltage, the fast-acting fuse in the current transformer arm is damaged and then the comparison unit sends the voltage signal for driving the alarm unit to send an alarm signal, thereby detecting the fault of the fast-acting fuse detector in a power current transformer and implementing the operation of maintaining the fast-acting fuse by a maintainer.
Description
Technical field
The application relates to the fastp-acting fuse technical field, particularly relates to a kind of rectifying installation fastp-acting fuse detecting device that is used for.
Background technology
Power semiconductor device thermal capacity is little, under nonserviceabling quick protection must be arranged, and fastp-acting fuse has and the similar thermal characteristics of semiconductor devices, is a kind of good protection device.At present, in the power converter protection, all use fastp-acting fuse as protection fast.
The inner parallel branch configuration protection of convertor arm formula is a kind of configuration mode of fastp-acting fuse in the power converter protection; this configuration mode all is in series with fastp-acting fuse in the inner parallel branch of convertor arm; when a certain branch road power semiconductor device damages for a certain reason; cause the quick protection disjunction that is in series with it; generally speaking; only power semiconductor device breaks down and does not influence whole power converter and normally move; therefore; under this kind configuration protection mode; and under electric power convertor equipment running status; can't judge the quality of fastp-acting fuse, also can't judge which fastp-acting fuse and fault occur.
In addition, the power converter of the inner parallel branch configuration protection of convertor arm mode more can't be judged the number of branches that fastp-acting fuse damages when running status.
Now, be badly in need of a kind of detection controller that can judge the fastp-acting fuse fault, safeguard Control work thereby make the maintainer better carry out fastp-acting fuse.
The utility model content
For solving the problems of the technologies described above, the embodiment of the present application provides a kind of fastp-acting fuse detecting device, and with the fault detect of the fastp-acting fuse that is implemented in the inner parallel branch configuration protection of convertor arm formula, technical scheme is as follows:
A kind of fastp-acting fuse detecting device is applied in the power converter, and the convertor arm inside of described power converter includes a plurality of parallel branches, comprising: comparing unit, alarm unit, wherein:
The public output of a plurality of parallel branches of described convertor arm inside links to each other with the first input end of described comparing unit by diode, and the cathodic end of described diode links to each other with the first input end of described comparing unit, second input end input preset reference voltage of described comparing unit, the output terminal of described comparing unit links to each other with described alarm unit.
Preferably, the number of described comparing unit is a plurality of, and the preset reference magnitude of voltage of described a plurality of comparing units is inequality;
The number of described alarm unit is identical with the number of described comparing unit, and described alarm unit and described comparing unit connect one to one.
Preferably, described comparing unit is a voltage comparator.
Preferably, the first input end of described comparing unit is an inverting input, and described second input end is an in-phase input end.
Preferably, described alarm unit is a light emitting diode, and the positive polarity end of described light emitting diode links to each other the cathodic end ground connection of described light emitting diode with the output terminal of described voltage comparator.
Preferably, the first input end of described comparer is an inverting input, and described second input end is an in-phase input end.
Preferably, described alarm unit is a light emitting diode, and the cathodic end of this light emitting diode links to each other the positive polarity end ground connection of described light emitting diode with the output terminal of described voltage comparator.
Preferably, also comprise: switching value output unit, programmable logic controller (PLC) PLC, remote monitoring unit and remote alarms unit, wherein:
The input end of described switching value output unit links to each other with the output terminal of described comparing unit, and the output terminal of described switching value output unit links to each other with the input end of described programmable logic controller (PLC) PLC;
Described remote monitoring unit links to each other with first output terminal of described Programmable Logic Controller PLC;
Described remote alarms unit links to each other with second output terminal of described Programmable Logic Controller PLC.
Preferably, described switching value output unit comprises: triode and relay, wherein:
The base stage of described triode is connected the grounded collector of described triode as the input end of this switching value output unit with the output terminal of described comparing unit;
The emitter of described triode is connected with working power with the coil of described relay series connection back;
The contact of described relay links to each other with the input end of described programmable logic controller (PLC) as the output terminal of this switching value output unit.
Preferably, the quantity of described switching value output unit is identical with the quantity of comparing unit, and the output terminal of a plurality of switching value output units is connected with the different input ends of programmable logic controller (PLC) respectively.
The technical scheme that is provided by above the embodiment of the present application as seen, all be serially connected with fastp-acting fuse in a plurality of parallel branches in the convertor arm in the power converter, when the fastp-acting fuse in a certain branch road damages because of certain reason, the voltage that parallel branch is exported will change, then, by the magnitude of voltage and the preset reference voltage of relatively parallel branch output, judge the running status of fastp-acting fuse.When described shunt voltage during greater than described preset reference voltage, showing has fastp-acting fuse to damage in the described convertor arm, comparer drives alarm unit with output voltage signal and sends alerting signal at this moment, thereby realized the detection to the fastp-acting fuse running status in the convertor arm in the power converter, the maintainer better carries out fastp-acting fuse and safeguards Control work.
Description of drawings
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, the accompanying drawing that describes below only is some embodiment that put down in writing among the application, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the electrical block diagram of a kind of fastp-acting fuse detecting device of the embodiment of the present application;
Fig. 2 is the structural representation of the circuit of the another kind of fastp-acting fuse detecting device of the embodiment of the present application;
Fig. 3 a is the electrical block diagram of a kind of comparing unit of the embodiment of the present application and alarm unit;
Fig. 3 b is the electrical block diagram of another kind of comparing unit of the embodiment of the present application and alarm unit;
Fig. 4 is the electrical block diagram of the another kind of fastp-acting fuse detecting device of the embodiment of the present application.
Embodiment
The fastp-acting fuse detecting device that the embodiment of the present application provides, be mainly used in the power converter, include a plurality of parallel branches in the convertor arm in the power converter, the number of described parallel branch can be that positive integer is individual arbitrarily, promptly all parallel branches all are connected in parallel between public input end and the public output, all be in series with fastp-acting fuse in each branch road in parallel, described fastp-acting fuse detecting device is exactly the running status that is used for detecting the fastp-acting fuse of parallel branch.When the fastp-acting fuse in the parallel branch damaged, described fastp-acting fuse can detect the state of the fastp-acting fuse of damage, and the driving alarm unit is reported to the police.
In order to make those skilled in the art person understand technical scheme among the application better, below in conjunction with the accompanying drawing in the embodiment of the present application, technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment only is the application's part embodiment, rather than whole embodiment.Based on the embodiment among the application, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all should belong to the scope of the application's protection.
See also Fig. 1, Fig. 1 shows the structural representation of the fastp-acting fuse detecting device of the embodiment of the present application, and this fastp-acting fuse detecting device mainly comprises: comparing unit 200 and alarm unit 300, wherein:
The public output of the parallel branch 100 in the described power converter in the convertor arm is connected by the first input end of diode 110 with described comparing unit 200, and the positive polarity end of diode 110 links to each other with the public output of described parallel branch 100, second input end input of comparing unit 200 has preset reference voltage, and the output terminal of comparing unit 200 links to each other with described alarm unit 300.
When the fastp-acting fuse in the power converter normally moved, parallel branch 100 output voltages of convertor arm were 0V, and when the fastp-acting fuse in the parallel branch 100 of power converter damaged for a certain reason, the voltage in the parallel branch can raise.When having No. 1 fastp-acting fuse to damage in all parallel branches, its output end voltage rises to about 1.89V, and when No. 2 fastp-acting fuses damaged, the voltage of its output terminal rose to about 3.43V.
It is many more that fastp-acting fuse damages quantity, and the voltage that the parallel branch public output is exported is high more.When fastp-acting fuse normally moves, parallel branch 100 in the described convertor arm disconnects not conducting, when fastp-acting fuse damages, parallel branch 100 conductings in the convertor arm, and all be serially connected with resistance in each parallel branch, when a plurality of parallel branches are damaged, be serially connected in the resistance parallel connection in the branch road, therefore, fastp-acting fuse damages many more, and its public output output voltage is high more.
Because some pressure drop on the diode 110, therefore, the preset reference voltage of comparing unit 200 can be set at 1.2V, as long as when having fastp-acting fuse to damage in the parallel branch 100, the voltage of its output terminal will be greater than the preset reference voltage of comparing unit 200, the output terminal output voltage of described comparing unit 200 drives coupled alarm unit 300, alarm unit 300 output alarm signals.Thereby realized the running status of the fastp-acting fuse in the parallel branch in the convertor arm of power converter is detected, and by type of alarm output testing result.
During concrete enforcement, described comparing unit 200 can adopt comparer to realize, described alarm unit can adopt light emitting diode to realize or realize audible alarm by hummer.
It will be understood by those skilled in the art that, comparing unit 200 can be by different preset reference magnitudes of voltage be set, further judge the damage quantity of fastp-acting fuse, also a plurality of comparing units can be set, the preset reference voltage of a plurality of comparing units is all inequality, judges the damage quantity of fastp-acting fuse.
The fastp-acting fuse detecting device that present embodiment provides is mainly used in the electric power unsteady flow gas, be used for detecting the running status of the fastp-acting fuse of connecting in the convertor arm parallel branch, the principle that its output end voltage changed when the fastp-acting fuse in the utilization parallel branch damaged, utilize comparing unit to realize the detection of fastp-acting fuse, when the parallel branch output voltage is higher than the preset reference voltage of comparing unit, the comparing unit output voltage drives alarm unit, carry out alerting signal, thereby realize detection, make the maintainer better carry out fastp-acting fuse and safeguard Control work the fastp-acting fuse running status in the convertor arm in the power converter.
Referring to Fig. 2, show the circuit theory diagrams of the another kind of fastp-acting fuse detecting device that the embodiment of the present application provides, the fastp-acting fuse detecting device difference that this fastp-acting fuse detecting device and the foregoing description provide is in the fastp-acting fuse detecting device in the present embodiment 2 comparing units and 2 alarm units are arranged.
The number of described comparing unit 200 mostly is parallel branch number in the convertor arm of power converter most, and the number of described alarm unit 300 is identical with the number of described comparing unit 200.And 2 comparing units can be judged the running status of the fastp-acting fuse more than 2 or 2.
Present embodiment is that example is elaborated with 2 comparing units:
Described comparing unit 200 comprises first comparing unit 210 and second comparing unit 220; Alarm unit 300 comprises first alarm unit 310 and second alarm unit 320.
The public output of the parallel branch 100 in the described convertor arm links to each other through the first input end of diode 110 respectively at first comparing unit 210 and second comparing unit 220, second input end input of described first comparing unit 210 has the first preset reference voltage V1, and second input end input of second comparing unit 220 has the second preset reference voltage V2.
The output terminal of first comparing unit 210 links to each other with first alarm unit 310, and the output terminal of second comparing unit 220 links to each other with second alarm unit 320.
It will be understood by those skilled in the art that, for the reliability that makes this fastp-acting fuse detector circuit is higher, the quantity of diode 110 can be 2, when wherein 1 diode 110 damages, another diode 110 can also be worked, thereby has improved the reliability of circuit.
Certainly, when comparing unit 200 when being a plurality of, the quantity of diode 110 also can be identical with the quantity of comparing unit in the circuit.
When the described first preset reference voltage V1 can damage according to the fastp-acting fuse that 1 branch road is arranged in the convertor arm, the magnitude of voltage that its parallel branch public output is exported and setting was specially the high level of the magnitude of voltage that is not higher than described parallel branch output terminal output.
The described second preset reference voltage V2 can be set at according to designing requirement and not be higher than the magnitude of voltage of being exported when 2 fastp-acting fuses in the branch road damage, the magnitude of voltage of being exported when the fuse when being higher than 1 fastp-acting fuse in the branch road simultaneously and damaging damages.
Concrete, a kind of concrete application example is as follows:
When the fastp-acting fuse of 1 branch road damaged, the magnitude of voltage of parallel branch public output output was about 1.9V, deducted pressure drop on the diode 110 again and was about 0.7V and obtains 1.2V, so the described first preset reference voltage V1 can be set at 1.2V.One of ordinary skill in the art will appreciate that the first preset reference voltage V1 so long as get final product less than the high level of 1.2V.
When the fastp-acting fuse in 1 parallel branch damages, the voltage of first input end 211 inputs of first comparing unit 210 is about 1.2V, the first preset reference voltage 1.2V greater than its second input end 212, outputting drive voltage drives the first coupled alarm unit 310, described first alarm unit sends alerting signal, thereby can judge whether fastp-acting fuse exists fault.
Concrete, when the fastp-acting fuse of 2 branch roads damages, the magnitude of voltage of parallel branch public output output is about 3.43V, deducts pressure drop on the diode 110 and is about 0.7V and obtains 2.73V, so the described second preset reference voltage V2 can be set at about 2.5V.One of ordinary skill in the art will appreciate that the second preset reference voltage V2 so long as get final product less than the 2.73V magnitude of voltage that the parallel branch output voltage is about 1.2V in the convertor arm when bad greater than 1 path loss.
When the fastp-acting fuse in the parallel branch more than 2 or 2 damages, the magnitude of voltage of the public output output of the parallel branch in the described power converter is greater than the described first preset reference voltage and the second preset reference voltage, at this moment, described first comparing unit 210 and described second comparing unit, 220 equal outputting drive voltages make win alarm unit 310 and second alarm unit 320 all send alerting signal, and then can judge the fastp-acting fuse damaged condition more than 2 or 2.
Because the fast bad number of melting loss in the parallel branch of power converter convertor arm is many more, its output voltage values is big more, and greater than the described first preset reference magnitude of voltage and the second preset reference magnitude of voltage, therefore, described fastp-acting fuse detecting device can detect the fastp-acting fuse damaged condition more than 2 or 2.
What one of ordinary skill in the art will appreciate that is, when the set preset reference magnitude of voltage of first comparing unit and second comparing unit not simultaneously, the number of defects difference of the detected fastp-acting fuse of this fastp-acting fuse detecting device energy, the magnitude of voltage of output is set when for example, the first preset reference magnitude of voltage of first comparing unit being damaged according to the fastp-acting fuse of 1 branch road of convertor arm; The magnitude of voltage of output was set when the second preset reference voltage of second comparing unit damaged according to the fastp-acting fuse of 3 branch roads in the convertor arm, then when the fastp-acting fuse that 1 or 2 branch road is arranged in the convertor arm damaged, first comparing unit drove first alarm unit with outputting drive voltage and reports to the police; When the fastp-acting fuse that 3 or 3 above branch roads are arranged in the convertor arm damaged, second comparing unit drove second alarm unit with outputting drive voltage and reports to the police.
The fastp-acting fuse that present embodiment provides is provided with two comparing unit first comparing units and second comparing unit, and when having No. 1 fastp-acting fuse to damage in the convertor arm, the first comparing unit outputting drive voltage drives first alarm unit and sends alerting signal; When the fastp-acting fuse more than 2 road or 2 tunnel damages, the second comparing unit outputting drive voltage drives second alarm unit, report to the police, therefore using the disclosed fastp-acting fuse detecting device of present embodiment can detect the running status of fastp-acting fuse in the power converter and can clearly detecting has 1 fastp-acting fuse in the branch road to damage in the power converter, the situation that the fastp-acting fuse in 2 or 2 branch roads damages.
Certainly, the number of the comparing unit in the foregoing description can be identical with the fastp-acting fuse number in the parallel branch in the power converter, the preset reference voltage of each comparing unit should increase successively, thereby can accurately detect the number that fastp-acting fuse damages.
Referring to Fig. 3 a and Fig. 3 b, the described comparing unit among above-mentioned two embodiment is a voltage comparator, and described alarm unit is a light emitting diode, and the annexation between described voltage comparator and the described light emitting diode has following two kinds of situations:
(1) first input end referring to the described voltage comparator of Fig. 3 a is an in-phase input end, second input end is an inverting input, and the public output of the parallel branch in first input end and the power converter links to each other, second input end input preset reference voltage Vth, the output terminal of voltage comparator links to each other with the positive polarity end of described light emitting diode, the negative polarity output head grounding of described light emitting diode.
When the magnitude of voltage of first input end input during greater than the magnitude of voltage of the preset reference voltage Vth of second input end input, showing has fastp-acting fuse to damage in the power converter, at this moment, the output terminal output high level of voltage comparator, the lumination of light emitting diode that driving is attached thereto carries out display alarm.
(2) first input end referring to the described voltage comparator of Fig. 3 b is an inverting input, and link to each other with the public output of parallel branch in the power converter, second input end is in-phase input end input preset reference voltage Vth, the output terminal of voltage comparator links to each other with the cathodic end of light emitting diode, the positive polarity end ground connection of described light emitting diode.
When the voltage of first input end input during greater than the magnitude of voltage of the preset reference voltage Vth of second input end input, showing has fastp-acting fuse to damage in the power converter, at this moment, and the output terminal output low level of voltage comparator, the lumination of light emitting diode that driving is attached thereto is reported to the police.
Need to prove that above-mentioned alarm unit can also be can realize showing and/or the alarm unit of audible alarm.
Referring to Fig. 4, the structural representation of the another kind of fastp-acting fuse detecting device that the embodiment of the present application provides, on the basis of the foregoing description, increased the remote monitoring function, concrete, the disclosed fastp-acting fuse detecting device of present embodiment is except that comprising convertor arm parallel branch 100, comparing unit 200, alarm unit 300, also comprise: switching value output unit 400, PLC (Programmable Logic Controller, programmable logic controller (PLC)) 500, remote monitoring unit 600, remote alarms unit 700, wherein:
The input end of switching value output unit 400, output terminal link to each other with the output terminal of comparing unit 200, the input end of described PLC500 respectively,
Described remote monitoring unit 600 can be the equipment that shows testing result, and described alarm unit can be a sound and light alarm.
During concrete enforcement, described switching value output unit 400 specifically can comprise triode 410 and relay 420, wherein, triode 420 is the positive-negative-positive triode, base stage links to each other with the output terminal of described comparing unit 200 as the input end of switching value output unit, grounded collector, emitter be connected to working power Vcc again after the coil of relay 420 is connected, the contact of described relay 420 links to each other with the input end of described PLC500 as the output terminal of switching value output unit.
And described comparing unit 200 is a voltage comparator, and its first input end to be inverting input link to each other with the public output of parallel branch in the power converter, second input end is in-phase input end input preset reference voltage Vth.When having fastp-acting fuse to damage in the power converter, comparing unit 200 outputting drive voltages drive described triode 420 conductings, make the relay coil that is serially connected on the emitter get, thereby make the normally opened contact closure of relay, the input end of described PLC obtains high level, and then detection and warning that the remote monitoring unit 600 that links to each other with described PLC output terminal and remote alarms unit 700 are realized the malfunction of fastp-acting fuse.
It will be appreciated by persons skilled in the art that above-mentioned triode can also be by the realization of NPN type triode, the application does not limit this, and every circuit of switching value output high level of can realizing all belongs to the scope that the application is open and protect.
In addition, described alarm unit 300 can also be parallel to the coil two ends of described switching value output unit 400 repeat circuits, and when alarm unit 300 is light emitting diode, the positive polarity end of this light emitting diode is connected to the end that described coil is connected with working power by current-limiting resistance, and the cathodic end links to each other with the other end of the coil of relay.
The quantity of the switching value output unit 400 in the foregoing description should be identical with the quantity of comparing unit 200, thereby and the output terminal of different switching value output unit be connected with the different input ends of described PLC respectively not only can local detection alarm and can realize remote alarms.
Each embodiment in this instructions all adopts the mode of going forward one by one to describe, identical similar part is mutually referring to getting final product between each embodiment, each embodiment stresses all is difference with other embodiment, those of ordinary skills promptly can understand and implement under the situation of not paying creative work
The above only is the application's a embodiment; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the application's principle; can also make some improvements and modifications, these improvements and modifications also should be considered as the application's protection domain.
Claims (10)
1. a fastp-acting fuse detecting device is applied in the power converter, and the convertor arm inside of described power converter includes a plurality of parallel branches, it is characterized in that, comprising: comparing unit, alarm unit, wherein:
The public output of a plurality of parallel branches of described convertor arm inside links to each other with the first input end of described comparing unit by diode, and the cathodic end of described diode links to each other with the first input end of described comparing unit, second input end input preset reference voltage of described comparing unit, the output terminal of described comparing unit links to each other with described alarm unit.
2. fastp-acting fuse detecting device according to claim 1 is characterized in that:
The number of described comparing unit is a plurality of, and the preset reference magnitude of voltage of described a plurality of comparing units is inequality;
The number of described alarm unit is identical with the number of described comparing unit, and described alarm unit and described comparing unit connect one to one.
3. fastp-acting fuse detecting device according to claim 2 is characterized in that, described comparing unit is a voltage comparator.
4. fastp-acting fuse detecting device according to claim 3 is characterized in that, the first input end of described comparing unit is an inverting input, and described second input end is an in-phase input end.
5. fastp-acting fuse detecting device according to claim 4 is characterized in that, described alarm unit is a light emitting diode, and the positive polarity end of described light emitting diode links to each other the cathodic end ground connection of described light emitting diode with the output terminal of described voltage comparator.
6. fastp-acting fuse detecting device according to claim 3 is characterized in that, the first input end of described comparer is an inverting input, and described second input end is an in-phase input end.
7. fastp-acting fuse detecting device according to claim 6 is characterized in that, described alarm unit is a light emitting diode, and the cathodic end of this light emitting diode links to each other the positive polarity end ground connection of described light emitting diode with the output terminal of described voltage comparator.
8. according to any described fastp-acting fuse detecting device of claim 1-7, it is characterized in that, also comprise: switching value output unit, programmable logic controller (PLC) PLC, remote monitoring unit and remote alarms unit, wherein:
The input end of described switching value output unit links to each other with the output terminal of described comparing unit, and the output terminal of described switching value output unit links to each other with the input end of described programmable logic controller (PLC) PLC;
Described remote monitoring unit links to each other with first output terminal of described Programmable Logic Controller PLC;
Described remote alarms unit links to each other with second output terminal of described Programmable Logic Controller PLC.
9. fastp-acting fuse detecting device according to claim 8 is characterized in that, described switching value output unit comprises: triode and relay, wherein:
The base stage of described triode is connected the grounded collector of described triode as the input end of this switching value output unit with the output terminal of described comparing unit;
The emitter of described triode is connected with working power with the coil of described relay series connection back;
The contact of described relay links to each other with the input end of described programmable logic controller (PLC) as the output terminal of this switching value output unit.
10. fastp-acting fuse detecting device according to claim 9, it is characterized in that, the quantity of described switching value output unit is identical with the quantity of comparing unit, and the output terminal of a plurality of switching value output units is connected with the different input ends of programmable logic controller (PLC) respectively.
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| CN201020609993XU CN201897627U (en) | 2010-11-16 | 2010-11-16 | Fast-acting fuse detector |
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| CN201020609993XU CN201897627U (en) | 2010-11-16 | 2010-11-16 | Fast-acting fuse detector |
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| CN102288908A (en) * | 2011-07-22 | 2011-12-21 | 重庆大学 | Fault monitoring device and fault judgment method for measurement potential transformer (PT) fuse |
| CN103135036A (en) * | 2011-11-24 | 2013-06-05 | 北汽福田汽车股份有限公司 | Device for detecting connection and disconnection of fuses in fuse box |
| CN103499767A (en) * | 2013-10-21 | 2014-01-08 | 刘海先 | Electronic instrument input fuse monitoring device |
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| CN102288908B (en) * | 2011-07-22 | 2013-04-03 | 重庆大学 | Fault monitoring device and fault judgment method for measurement potential transformer (PT) fuse |
| CN102288908A (en) * | 2011-07-22 | 2011-12-21 | 重庆大学 | Fault monitoring device and fault judgment method for measurement potential transformer (PT) fuse |
| CN103135036A (en) * | 2011-11-24 | 2013-06-05 | 北汽福田汽车股份有限公司 | Device for detecting connection and disconnection of fuses in fuse box |
| CN103499767A (en) * | 2013-10-21 | 2014-01-08 | 刘海先 | Electronic instrument input fuse monitoring device |
| CN104181438A (en) * | 2014-08-28 | 2014-12-03 | 长城汽车股份有限公司 | Fault detection circuit, method and device |
| CN104734131A (en) * | 2015-04-03 | 2015-06-24 | 四川蓝讯宝迩电子科技有限公司 | Lightning arrester monitoring system with audible alarm function |
| CN104767190A (en) * | 2015-04-03 | 2015-07-08 | 四川蓝讯宝迩电子科技有限公司 | Alerting circuit for monitoring lightning arrester degradation |
| CN104734131B (en) * | 2015-04-03 | 2017-12-01 | 四川蓝讯宝迩电子科技有限公司 | Arrester monitoring system with sound alarm function |
| CN104767190B (en) * | 2015-04-03 | 2017-12-01 | 四川蓝讯宝迩电子科技有限公司 | Monitor the warning circuit of arrester deterioration |
| CN104749485B (en) * | 2015-04-17 | 2017-12-12 | 江苏智光创业投资有限公司 | Fuse electric loading Intelligent indicating device |
| CN104749485A (en) * | 2015-04-17 | 2015-07-01 | 周玉林 | Intelligent indicating device for electricity load of fuse |
| CN107247213A (en) * | 2017-06-27 | 2017-10-13 | 株洲中车时代电气股份有限公司 | The collecting and distributing main fuse condition detection method and device of a kind of photovoltaic generating system |
| CN109975643A (en) * | 2017-12-28 | 2019-07-05 | 沃尔缇夫能源系统公司 | Load fuse detection method and equipment |
| CN108735321A (en) * | 2018-06-22 | 2018-11-02 | 江苏核电有限公司 | A kind of control loop power supply is in alarm device and its verification method |
| CN111337841A (en) * | 2018-11-30 | 2020-06-26 | 南昌华勤电子科技有限公司 | Mobile terminal and battery state detection system thereof |
| CN114167302A (en) * | 2020-09-09 | 2022-03-11 | 株洲中车时代电气股份有限公司 | Fast fusing fault positioning system and method of rectifier power supply and storage medium |
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