CN204481457U - Open circuit warning circuit - Google Patents
Open circuit warning circuit Download PDFInfo
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- CN204481457U CN204481457U CN201520078238.6U CN201520078238U CN204481457U CN 204481457 U CN204481457 U CN 204481457U CN 201520078238 U CN201520078238 U CN 201520078238U CN 204481457 U CN204481457 U CN 204481457U
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Abstract
The utility model discloses open circuit warning circuit, comprise 555 timers, triode T, loudspeaker RL, multiple Led lamp, multiple diode and three fusing branch roads, fusible link BX1, BX2 and BX3 are connected on three fusing branch roads, article three, fusing branch road one end connects the positive pole of 12V power supply simultaneously, the positive pole of the 12V power supply also emitter of connecting triode T, the signal input part of 555 timers and loudspeaker RL simultaneously; Described loudspeaker RL also connects the output end vo ut of electric capacity C2 and 555 timers successively, the signal trigger end EN of the collector electrode of described triode T series resistance R5 and 555 timers successively.The utility model, by above-mentioned principle, is applied in the power-supply system that many branch roads power, certain branch road can be indicated accurately whether to occur open circuit, overhauling, using more convenient when ensureing that other branch road is powered.
Description
Technical field
The utility model relates to many branch roads for electrical domain, is specifically related to open circuit warning circuit.
Background technology
What the power supply system for communications was made up of rectifying installation, DC distribution equipment, batteries, DC converter, rack power supplies equipment and relevant distribution line is totally called DC power-supply system.The power supply system for communications generally comprises double loop 10 kV high-pressure system, the low pressure transformation and distribution system of 10 kV/380 V, oil machine electric power system, high frequency switch power supply system (DC rectifier and distribution system), ups system, lightning protection earthing system, centralized monitoring system etc.And in the electric power system of base station, generally do not comprise 10 kV high-pressure systems, usually directly introduce 220/380 V power supply of locality, other substantially identical.Although the ratio that the power supply system for communications accounts in the whole communications industry is smaller, it is the critical infrastructures of whole communication network, is a complete and irreplaceable independent specialty on communication network.In the power-supply system having many branch roads to power of today, if certain branch road occurs that blowing phenomenon does not have clear and definite instruction, be not easy to other branch road and place under repair when powering.
Utility model content
The utility model overcomes the deficiencies in the prior art, open circuit warning circuit is provided, in the power-supply system that this circuit application is powered at many branch roads, certain branch road can be indicated accurately whether to occur open circuit, overhauling when ensureing that other branch road is powered, using more convenient.
For solving above-mentioned technical problem, the utility model is by the following technical solutions: open circuit warning circuit, comprise 555 timers, triode T, loudspeaker RL, multiple Led lamp, multiple diode and three fusing branch roads, fusible link BX1, BX2 and BX3 are connected on three fusing branch roads, article three, fusing branch road one end connects the positive pole of 12V power supply simultaneously, the positive pole of the 12V power supply also emitter of connecting triode T, the signal input part of 555 timers and loudspeaker RL simultaneously, described loudspeaker RL also connects the output end vo ut of electric capacity C2 and 555 timers successively, the signal trigger end EN of the collector electrode of described triode T series resistance R5 and 555 timers successively, between the signal trigger end EN of described 555 timers and port 6, resistance R6 is also set, between the port one of 555 timers and port 2, electric capacity C1 is also set, connect between the port 2 of 555 timers and port 6, the port one of 555 timers also connects the negative pole of 12V power supply, described multiple diode comprises diode D1, diode D2 and diode D3, the basis set of three diodes end points end contact resistance R4 and triode T successively altogether, the negative pole of diode D1 also contact resistance R1 and Led1 successively, the negative pole of diode D2 also contact resistance R2 and Led2 successively, the negative pole of diode D3 also contact resistance R3 and Led3 successively, Led1 wherein, the common port of Led2 with Led3 is connected the negative pole of 12V power supply and the port one of 555 timers simultaneously, diode D1 is wherein connected fusible link BX1 with the common port of resistance R1, diode D2 is connected fusible link BX2 with the common port of resistance R2, diode D3 is connected fusible link BX3 with the common port of resistance R3.
Further, the model of described triode T is 3CG21.Cost performance is high, function-stable.
Further, the model of diode D1, diode D2 and diode D3 is 2AK10.Utilize multiple diode to flow to the signal in respective branch respectively to control, the safety of protection triode further.
Further, the model of described 555 timers is NE555DR.
Compared with prior art, the beneficial effects of the utility model are:
1, the extinguishing situation of Led lamp in this circuit chimes of doom that can send according to loudspeaker and corresponding branch road, double-reminding, clearly instruction is certain branch road fuse opening, only to overhaul fault branch when not affecting other branch roads and powering, use more convenient.
2, this circuit adopts model to be that 3CG21 triode T is as electronic switch; cost performance is high; for providing triggering signal to control the sounding of loudspeaker RL to 555 timers, and triode arranges corresponding safeguard measure, and this circuit working is more stable.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
Be further elaborated the utility model below in conjunction with accompanying drawing, embodiment of the present utility model is not limited thereto.
Embodiment 1:
As shown in Figure 1, the utility model comprises 555 timers, triode T, resistance are the loudspeaker RL in 8 Europe, multiple Led lamp, multiple diode and three fusing branch roads, fusible link BX1, BX2 and BX3 are connected on three fusing branch roads, article three, fusing branch road one end connects the positive pole of 12V power supply simultaneously, the positive pole of the 12V power supply also emitter of connecting triode T, the signal input part of 555 timers and loudspeaker RL simultaneously; Described loudspeaker RL also connects the output end vo ut of electric capacity C2 and 555 timers successively, the signal trigger end EN of the collector electrode of described triode T series resistance R5 and 555 timers successively.Between the signal trigger end EN of described 555 timers and port 6, resistance R6 is also set, between the port one of 555 timers and port 2, electric capacity C1 is also set, connect between the port 2 of 555 timers and port 6, the port one of 555 timers also connects the negative pole of 12V power supply, described multiple diode comprises diode D1, diode D2 and diode D3, the basis set of three diodes end points end contact resistance R4 and triode T successively altogether, the negative pole of diode D1 also contact resistance R1 and Led1 successively, the negative pole of diode D2 also contact resistance R2 and Led2 successively, the negative pole of diode D3 also contact resistance R3 and Led3 successively, Led1 wherein, the common port of Led2 with Led3 is connected the negative pole of 12V power supply and the port one of 555 timers simultaneously, diode D1 is wherein connected fusible link BX1 with the common port of resistance R1, diode D2 is connected fusible link BX2 with the common port of resistance R2, diode D3 is connected fusible link BX3 with the common port of resistance R3.100 kilo-ohms of resistance R5 wherein, 47 kilo-ohms of resistance R6,47 kilo-ohms of resistance R4 are all to protect triode, avoid triode damaged; 10 F capacitor C1 wherein and 0.01 F capacitor C2 are then for filtering.
Circuit working principle is as follows: the every root fusible link in this circuit connects a branch road all separately, whether the fusible link that the setting of multiple Led lamp is then used to indicate a certain road fuses, if fuse, the Led lamp in respective branch extinguishes, loudspeaker send chimes of doom simultaneously, and triode T is wherein then as electronic switch.When the fusible link of each branch road normally work do not fuse time, then 12V power supply can supply Led1, Led2 and Led3 place branch road electric energy, make it luminous, now higher in the basis set voltage Vb value of triode T, and the voltage of triode T emitter is the input Vin voltage of 555 timers, and input Vin voltage is 12V supply voltage.And triode T wants conducting, then the emitter voltage of triode T deducts basis set voltage and is greater than collector voltage Vt, ability conducting, i.e. Vin-Vb ﹥ Vt, and due to fusible link normally work time, Vb is larger for basis set voltage, make Vin-Vb ﹤ Vt, triode cannot conducting, and triode cannot give 555 timers input triggering signals, and loudspeaker RL also can not send chimes of doom.
When the fusible link of any in three branch roads fuses, then can cause the Led lamp power-off that is connected with fusible link in this branch road thus extinguish, and now the basis set voltage Vb of triode T reduces, triode T emitter voltage Vin then remains unchanged, it is still 12V supply voltage, then now the emitter voltage of triode T deducts the increase of basis set voltage, the collector voltage Vt of triode T is then constant, thus there is Vin-Vb ﹥ Vt, triode T conducting, the collector electrode of triode T sends triggering signal, entered by the trigger end EN of 555 timers, then the signal after process is passed through the signal output part Vout output action of 555 timers in loudspeaker RL vocalized alerts, remind staff, staff only just need see whether the Led lamp of corresponding branch road extinguishes and can judge fault branch, only need overhaul fault branch when ensureing that other branch road is powered, use more convenient.
Embodiment 2:
The present embodiment is preferably as follows on the basis of above-described embodiment: the model of described triode T is 3CG21.
In order to protect triode T, the model of diode D1, diode D2 and diode D3 is 2AK10.Utilize multiple diode to flow to the signal in respective branch respectively to control, the safety of protection triode further.
The model of described 555 timers is NE555DR.
Just this utility model can be realized as mentioned above.
Claims (4)
1. open circuit warning circuit, it is characterized in that: comprise 555 timers, triode T, loudspeaker RL, multiple Led lamp, multiple diode and three fusing branch roads, fusible link BX1, BX2 and BX3 are connected on three fusing branch roads, article three, fusing branch road one end connects the positive pole of 12V power supply simultaneously, the positive pole of the 12V power supply also emitter of connecting triode T, the signal input part of 555 timers and loudspeaker RL simultaneously, described loudspeaker RL also connects the output end vo ut of electric capacity C2 and 555 timers successively, the signal trigger end EN of the collector electrode of described triode T series resistance R5 and 555 timers successively, between the signal trigger end EN of described 555 timers and port 6, resistance R6 is also set, between the port one of 555 timers and port 2, electric capacity C1 is also set, connect between the port 2 of 555 timers and port 6, the port one of 555 timers also connects the negative pole of 12V power supply, described multiple diode comprises diode D1, diode D2 and diode D3, the basis set of three diodes end points end contact resistance R4 and triode T successively altogether, the negative pole of diode D1 also contact resistance R1 and Led1 successively, the negative pole of diode D2 also contact resistance R2 and Led2 successively, the negative pole of diode D3 also contact resistance R3 and Led3 successively, Led1 wherein, the common port of Led2 with Led3 is connected the negative pole of 12V power supply and the port one of 555 timers simultaneously, diode D1 is wherein connected fusible link BX1 with the common port of resistance R1, diode D2 is connected fusible link BX2 with the common port of resistance R2, diode D3 is connected fusible link BX3 with the common port of resistance R3.
2. open circuit warning circuit according to claim 1, is characterized in that: the model of described triode T is 3CG21.
3. open circuit warning circuit according to claim 1, is characterized in that: the model of diode D1, diode D2 and diode D3 is 2AK10.
4. open circuit warning circuit according to claim 1, is characterized in that: the model of described 555 timers is NE555DR.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520078238.6U CN204481457U (en) | 2015-02-04 | 2015-02-04 | Open circuit warning circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520078238.6U CN204481457U (en) | 2015-02-04 | 2015-02-04 | Open circuit warning circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204481457U true CN204481457U (en) | 2015-07-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520078238.6U Expired - Fee Related CN204481457U (en) | 2015-02-04 | 2015-02-04 | Open circuit warning circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204481457U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104795785A (en) * | 2015-02-04 | 2015-07-22 | 成都市宏山科技有限公司 | Alarm indication circuit |
-
2015
- 2015-02-04 CN CN201520078238.6U patent/CN204481457U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104795785A (en) * | 2015-02-04 | 2015-07-22 | 成都市宏山科技有限公司 | Alarm indication circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150715 Termination date: 20160204 |
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| CF01 | Termination of patent right due to non-payment of annual fee |