CN200973012Y - DC low voltage distributor - Google Patents
DC low voltage distributor Download PDFInfo
- Publication number
- CN200973012Y CN200973012Y CN 200520099693 CN200520099693U CN200973012Y CN 200973012 Y CN200973012 Y CN 200973012Y CN 200520099693 CN200520099693 CN 200520099693 CN 200520099693 U CN200520099693 U CN 200520099693U CN 200973012 Y CN200973012 Y CN 200973012Y
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- positive pole
- circuit
- output
- negative pole
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Abstract
The utility model relates to a DC low-voltage power distribution appliance, which mainly comprises a self-recovery insurance, a sound alarming device, an optic alarming device, an alarming control circuit and a working instruction circuit. In each branch circuit, the self-recovery insurance R <z> is used to replace the traditional fuse pipe or the breaker. In case of short-circuit or over-current in the electrical appliance in certain branch circuit, the element immediately presents the high-resistance status, thereby protecting the safety of the general power supply and the electrical appliance. Then the status is recovered immediately after the failure is eliminated automatically. The attached circuit displays working normal (green LED D2 constant light) in case of no failure, optical alarming (green LED D2 off, red LED D1 flashing, the buzzer YD hurriedly buzzing). The buzzer YD is shared by all branch circuits and are red, green and green LED and can display status of each branch circuit.
Description
Affiliated technical field
The utility model relates to a kind of low-voltage distribution equipment, can be short-circuited or provides that effective protection is concurrently spoken, visual alarm during overcurrent at each branch road electrical appliance, shows the branch road of guilty culprit, especially after the fault eliminating, can recover automatically immediately.
Background technology
In the Experiments of Electricity teaching of all kinds of height, secondary school,, many equipment investments certainly will to be increased if all be equipped with a low-tension supply for each experimental group.High-power low-tension supply centrally connected power supply of the normal employing in laboratory is dispensed into each experimental bench with feeder line.But there is a shortcoming in this power supply plan: when having one group short circuit to occur on many experimental benches, overcurrent protection will appear in low-tension supply, and electric voltage dropping makes the experiment of full chamber sink into to pause to zero.The experiment teacher needs to seek out from numerous experimental benches that group of short circuit, restarts power supply after fixing a breakdown, and experiment just can be proceeded.Certainly, can in the supply socket of each experimental group, all load onto fuse, but still unavoidably change the trouble of fuse.
This distributor system aims at and addresses this problem and design.
Summary of the invention
This distributor all is provided with short circuit overcurrent protection and sound and light alarm, operate as normal indicating circuit to every branch road.All can react rapidly when the electrical appliance generation overcurrent of arbitrary branch road, short trouble; protect the safety of supply line and electrical appliance effectively, send sound, visual alarm simultaneously, show abort situation; and after fault is got rid of, stop immediately reporting to the police, recover normal power supply automatically.
The technical scheme that its technical problem that solves the utility model adopts is: with insuring R from recovery
Z(polyswitch) replace traditional cartridge fuse or circuit breaker.Device is formed by recovering insurance, acoustic alarm device, light crossing-signal, alarm control circuit and working indicating certainly, and each distributor can be established n bar branch road (getting n=4～6 usually), and each bar branch road all has one from recovering insurance R
Zi(i=1,2 ... n), R
ZiThe positive pole of a termination input, the output out of i branch road of another termination
iPositive pole.
Each distributor is provided with an acoustic alarm device DY (buzzer), by each branch road shared.DY and electrochemical capacitor C, voltage stabilizing didoe D
0After the parallel connection, its positive pole links to each other with the positive pole of input in; Alarm control circuit BG in i branch road
iEmitter connect the negative pole of acoustic alarm device DY, collector electrode is through resistance R
I1With light crossing-signal D
I1(red LED) is anodal to link to each other, and base stage is through resistance R
I2With out
iPositive pole link to each other; Light crossing-signal D
I1Negative pole and out
iNegative pole link to each other; Operation indicator D
I2The anode of (green LED) is through resistance R
I2With out
iPositive pole link to each other negative terminal and out
iNegative pole link to each other.
Device is provided with and relays interface out
0, its positive pole links to each other with the positive pole of input in, and negative pole links to each other with the negative pole of input in, and negative pole also links to each other with the negative pole of each branch road output.
From recovering insurance R
zBe a kind of by conducting polymer materials make have PTC (positive temperature coefficient) characteristic can automatically reset overflow protecting element.When load current is less than or equal to its holding current I
H, it is low resistive state, and pressure drop is very little.This moment output voltage U
oNear input voltage U
i, controlling alarm triode BG
iBe in cut-off state, sound, light crossing-signal are not worked, and the green LED D in the working indicating
I2Permanent bright, show working properly.When a certain branch road load short circuits or electric current reach R
ZiOperating current I
Ti(be generally I
Hi2 times) time, R
ZiBe high-impedance state immediately, the electric current that passes through is very little, and supply line and electrical appliance are shielded.This moment output voltage U
o≈ 0, the green LED D in the working indicating
I2Extinguish R
ZiOn pressure drop U
Rz≈ U
i, triode BG
iBe in conducting state, sound, optical alarm circuit get electric work.In sound, optical alarm circuit, because dropping resistor Ri
1Effect, red LED Di
1Brightness glimmer with the variation of buzzer YD cry.
The beneficial effects of the utility model are that each bar branch road is all had auto restore facility harmony, light warning function, red LED D
I1With green LED D
I2Can show it is which bar branch road breaks down.During normal the use, main element is from recovering insurance R
zResistance is very little, and warning circuit is power consumption hardly, thereby power consumption is very low.Sound, light are reported to the police and taked rapid short sound and glittering mode, and is noticeable.
Description of drawings
Accompanying drawing is an electrical schematic diagram of the present utility model, and two branch roads only draw among the figure.As can be seen, the circuit of every branch road is identical.As required, each distributor can be provided with 4～6 branch roads.
Embodiment
Circuit shown in the drawings is applicable to low-voltage dc circuit.From recovering insurance R
ZiRunning current I
HWith withstand voltage U
MaxBe its two important indicators,, should select for use as required.Common U
MaxShould be greater than working voltage, and I
HThe maximum operating currenbt that should be a bit larger tham electrical appliance in every branch road.In this circuit, voltage stabilizing didoe D
0The voltage stabilizing value should be slightly higher than the rated voltage of selected short sound buzzer, resistance R
1, R
2, R
3Resistance should suitably choose green LED D in the time of must making fault-free according to operating voltage
I2Can be normally luminous, buzzer and red LED D when fault is arranged
I1Can send suitable sound and flash of light.As for triode BG
i, general positive-negative-positive low-frequency tube can both meet the demands basically.
Each distributor all has one to relay interface out
0, can insert another identical distributor, the convenient use.
Claims (2)
1, a kind of DC low voltage distribution device is mainly formed by recovering insurance, acoustic alarm device, light crossing-signal, alarm control circuit and working indicating certainly, it is characterized in that: recover insurance R certainly
ZiAn end link to each other with the positive pole of input, i is 1,2 ... n, n props up way for the output of each distributor, and the other end links to each other with the positive pole of the output of i branch road; After acoustic alarm device and electrochemical capacitor, voltage stabilizing didoe were in parallel, its positive pole linked to each other with the positive pole of input; The emitter of alarm control circuit connects the negative pole of acoustic alarm device, and collector electrode links to each other through resistance and light crossing-signal positive pole, and base stage links to each other with the positive pole of output through resistance; The negative pole of light crossing-signal links to each other with the negative pole of output; The anode of operation indicator links to each other with the positive pole of output through resistance, and negative terminal links to each other with the negative pole of output.
2, a kind of DC low voltage distribution device according to claim 1 is characterized in that being provided with and relays interface, and its positive pole links to each other with the positive pole of input, and negative pole links to each other with the negative pole of input, and negative pole also links to each other with the negative pole of each branch road output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520099693 CN200973012Y (en) | 2005-12-28 | 2005-12-28 | DC low voltage distributor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520099693 CN200973012Y (en) | 2005-12-28 | 2005-12-28 | DC low voltage distributor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200973012Y true CN200973012Y (en) | 2007-11-07 |
Family
ID=38884262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520099693 Expired - Fee Related CN200973012Y (en) | 2005-12-28 | 2005-12-28 | DC low voltage distributor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200973012Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102103950A (en) * | 2011-02-28 | 2011-06-22 | 朱虹 | Direct current power supply fuse monitoring device with sound-light reminding |
| CN112701654A (en) * | 2020-12-04 | 2021-04-23 | 珠海格力电器股份有限公司 | Short-circuit protection device, circuit system and short-circuit protection method thereof |
-
2005
- 2005-12-28 CN CN 200520099693 patent/CN200973012Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102103950A (en) * | 2011-02-28 | 2011-06-22 | 朱虹 | Direct current power supply fuse monitoring device with sound-light reminding |
| CN112701654A (en) * | 2020-12-04 | 2021-04-23 | 珠海格力电器股份有限公司 | Short-circuit protection device, circuit system and short-circuit protection method thereof |
| CN112701654B (en) * | 2020-12-04 | 2023-02-28 | 珠海格力电器股份有限公司 | Short-circuit protection device, circuit system and short-circuit protection method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071107 Termination date: 20100128 |