CN204464974U - A kind of power distribution cabinet low-voltage circuit - Google Patents
A kind of power distribution cabinet low-voltage circuit Download PDFInfo
- Publication number
- CN204464974U CN204464974U CN201520092027.8U CN201520092027U CN204464974U CN 204464974 U CN204464974 U CN 204464974U CN 201520092027 U CN201520092027 U CN 201520092027U CN 204464974 U CN204464974 U CN 204464974U
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- circuit
- distribution cabinet
- power distribution
- triode
- amplifying circuit
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Abstract
The utility model discloses a kind of power distribution cabinet low-voltage circuit, comprise proximity switch, the transformer be connected in parallel with proximity switch, the rectification circuit be connected with transformers connected in parallel, the filter circuit be connected with rectification circuit, the bleeder circuit be connected with filter circuit, the amplifying circuit one be connected with bleeder circuit and amplifying circuit two, the triode V1 be all connected with amplifying circuit one and amplifying circuit two, the delay circuit be connected with triode V1, the triode V2 be connected with delay circuit, and the relay to be connected with triode V2, amplifying circuit one comprises the amplifier one be sequentially connected in series, resistance R3, and LED 1, amplifying circuit two comprises the amplifier two be sequentially connected in series, resistance R4, LED 2.The power distribution cabinet low-voltage circuit that the utility model provides, can overtension and too low time cut off the electricity supply, automatic recovery of power supply after voltage is normal, thus avoid the generation of power distribution cabinet security incident.
Description
Technical field
The utility model relates to low-voltage distribution cabinet technical field, more particularly, relates to a kind of power distribution cabinet low-voltage circuit.
Background technology
In low-voltage distribution cabinet, when causing interior lines to be tripped because breaking down or when harmonic wave produces interference, easily there is overtension or too low in unit, overtension or too low multiple element fluctuations of service that all can cause in power distribution cabinet, potential safety hazard is serious, therefore, need to do its structure to study further and improve.
Utility model content
For solving above technical problem, the power distribution cabinet low-voltage circuit that the utility model provides, can overtension and too low time cut off the electricity supply, automatic recovery of power supply after voltage is normal, thus avoid the generation of power distribution cabinet security incident.
The technical solution of the utility model is:
A kind of power distribution cabinet low-voltage circuit, comprise proximity switch, the transformer be connected in parallel with proximity switch, the rectification circuit be connected with transformers connected in parallel, the filter circuit be connected with rectification circuit, the bleeder circuit be connected with filter circuit, the amplifying circuit one be connected with bleeder circuit and amplifying circuit two, the triode V1 be all connected with amplifying circuit one and amplifying circuit two, the delay circuit be connected with triode V1, the triode V2 be connected with delay circuit, and the relay to be connected with triode V2, amplifying circuit one comprises the amplifier one be sequentially connected in series, resistance R3, and LED 1, amplifying circuit two comprises the amplifier two be sequentially connected in series, resistance R4, LED 2.
Further, described filter circuit adopts filter capacitor C2.
Further, described bleeder circuit output is connected with the in-phase input end of described amplifier one.
Further, described bleeder circuit output is connected with the inverting input of described amplifier two.
Further, described amplifying circuit one is all connected with the base stage of described triode V1 with amplifying circuit two output.
Further, described delay circuit one end is connected with described triode V1 collector electrode, and the other end is connected with described triode V2 base stage.
Further, described delay circuit comprises resistance R5 and electric capacity C3.
Further, the inverting input of described amplifying circuit one and the in-phase input end of amplifying circuit two are connected with pressurizer jointly.
Further, described pressurizer adopts TL431.
The beneficial effects of the utility model: the power distribution cabinet low-voltage circuit that the utility model provides, can overtension and too low time cut off the electricity supply, automatic recovery of power supply after voltage is normal, thus avoid the generation of power distribution cabinet security incident.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is structural representation of the present utility model.
Embodiment
For making the object of the utility model embodiment, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
A kind of power distribution cabinet low-voltage circuit shown in composition graphs 1, comprise proximity switch, the transformer be connected in parallel with proximity switch, the rectification circuit be connected with transformers connected in parallel, the filter circuit be connected with rectification circuit, the bleeder circuit be connected with filter circuit, the amplifying circuit one be connected with bleeder circuit and amplifying circuit two, the triode V1 be all connected with amplifying circuit one and amplifying circuit two, the delay circuit be connected with triode V1, the triode V2 be connected with delay circuit, and the relay to be connected with triode V2, amplifying circuit one comprises the amplifier one be sequentially connected in series, resistance R3, and LED 1, amplifying circuit two comprises the amplifier two be sequentially connected in series, resistance R4, LED 2.
In the present embodiment, described filter circuit adopts filter capacitor C2.
In the present embodiment, described bleeder circuit output is connected with the in-phase input end of described amplifier one.
In the present embodiment, described bleeder circuit output is connected with the inverting input of described amplifier two.
In the present embodiment, described amplifying circuit one is all connected with the base stage of described triode V1 with amplifying circuit two output.
In the present embodiment, described delay circuit one end is connected with described triode V1 collector electrode, and the other end is connected with described triode V2 base stage.
In the present embodiment, described delay circuit comprises resistance R5 and electric capacity C3.
In the present embodiment, the inverting input of described amplifying circuit one and the in-phase input end of amplifying circuit two are connected with pressurizer jointly.
In the present embodiment, described pressurizer adopts TL431.
Operation principle of the present utility model is as follows:
When after circuit ON, transformer T secondary voltage is through rectification, the direct voltage obtained after filtering, one tunnel is through R7, R6 dividing potential drop obtains sampled voltage, but due to R7, C1 time constant is very large, UA need slowly set up, during beginning, UA is less than the lower voltage limit of IC2B setting, then it exports as high level, LED2 lights, V1 conducting, another road direct voltage makes relay break contact disconnect through V2 (because of V1 conducting), power distribution cabinet power-off, during V2 conducting, C3 is by V2 emitter and R5 charging, form secondary delay, when UA reaches the lower voltage limit of IC2B, IC2B exports reversion, LED2 extinguishes, V1 ends, V2 also ends, relay contact recovers normally closed, power distribution cabinet obtains electric starting working.
When line voltage is too high, when UA is greater than the upper voltage limit of IC2A setting, it exports high level; LED1 lights; after V1, V2 conducting time delay, relay cuts off, and the bound voltage range power distribution cabinet only having UA to be positioned at IC2 setting could obtain electric work, otherwise relay power-off protection.
When sending a telegram here again after grid cut-off, need through time delay, power distribution cabinet could obtain electric work, meanwhile, because time delay makes again fluctuating widely in short-term of line voltage not make relay connect immediately, thus has good Anti-Jamming; In addition, also can avoid when UA is positioned near the upper limit or lower voltage limit value, IC2 is in critical condition easily makes IC2 output level frequently change and cause the fraud of relay frequent movement.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment done, equivalent replacement etc., all should be included within protection range of the present utility model.
Claims (9)
1. a power distribution cabinet low-voltage circuit, it is characterized in that, comprise proximity switch, the transformer be connected in parallel with proximity switch, the rectification circuit be connected with transformers connected in parallel, the filter circuit be connected with rectification circuit, the bleeder circuit be connected with filter circuit, the amplifying circuit one be connected with bleeder circuit and amplifying circuit two, the triode V1 be all connected with amplifying circuit one and amplifying circuit two, the delay circuit be connected with triode V1, the triode V2 be connected with delay circuit, and the relay to be connected with triode V2, amplifying circuit one comprises the amplifier one be sequentially connected in series, resistance R3, and LED 1, amplifying circuit two comprises the amplifier two be sequentially connected in series, resistance R4, LED 2.
2. power distribution cabinet low-voltage circuit as claimed in claim 1, is characterized in that, described filter circuit adopts filter capacitor C2.
3. power distribution cabinet low-voltage circuit as claimed in claim 1, it is characterized in that, described bleeder circuit output is connected with the in-phase input end of described amplifier one.
4. power distribution cabinet low-voltage circuit as claimed in claim 1, it is characterized in that, described bleeder circuit output is connected with the inverting input of described amplifier two.
5. power distribution cabinet low-voltage circuit as claimed in claim 1, it is characterized in that, described amplifying circuit one is all connected with the base stage of described triode V1 with amplifying circuit two output.
6. power distribution cabinet low-voltage circuit as claimed in claim 1, it is characterized in that, described delay circuit one end is connected with described triode V1 collector electrode, and the other end is connected with described triode V2 base stage.
7. power distribution cabinet low-voltage circuit as claimed in claim 6, it is characterized in that, described delay circuit comprises resistance R5 and electric capacity C3.
8. power distribution cabinet low-voltage circuit as claimed in claim 1, it is characterized in that, the inverting input of described amplifying circuit one and the in-phase input end of amplifying circuit two are connected with pressurizer jointly.
9. power distribution cabinet low-voltage circuit as claimed in claim 8, is characterized in that, described pressurizer adopts TL431.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520092027.8U CN204464974U (en) | 2015-02-09 | 2015-02-09 | A kind of power distribution cabinet low-voltage circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520092027.8U CN204464974U (en) | 2015-02-09 | 2015-02-09 | A kind of power distribution cabinet low-voltage circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204464974U true CN204464974U (en) | 2015-07-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520092027.8U Expired - Fee Related CN204464974U (en) | 2015-02-09 | 2015-02-09 | A kind of power distribution cabinet low-voltage circuit |
Country Status (1)
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| CN (1) | CN204464974U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105140926A (en) * | 2015-10-21 | 2015-12-09 | 珠海格力电器股份有限公司 | Electrical equipment power supply control method and control system thereof |
| CN107256056A (en) * | 2017-07-05 | 2017-10-17 | 佛山杰致信息科技有限公司 | The low-voltage circuit of power distribution cabinet |
| CN108281937A (en) * | 2017-12-29 | 2018-07-13 | 河南北瑞电子科技有限公司 | A kind of refrigerator high-low pressure protective device |
| CN108462156A (en) * | 2017-12-29 | 2018-08-28 | 河南北瑞电子科技有限公司 | A kind of over-pressure safety device |
-
2015
- 2015-02-09 CN CN201520092027.8U patent/CN204464974U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105140926A (en) * | 2015-10-21 | 2015-12-09 | 珠海格力电器股份有限公司 | Electrical equipment power supply control method and control system thereof |
| CN107256056A (en) * | 2017-07-05 | 2017-10-17 | 佛山杰致信息科技有限公司 | The low-voltage circuit of power distribution cabinet |
| CN108281937A (en) * | 2017-12-29 | 2018-07-13 | 河南北瑞电子科技有限公司 | A kind of refrigerator high-low pressure protective device |
| CN108462156A (en) * | 2017-12-29 | 2018-08-28 | 河南北瑞电子科技有限公司 | A kind of over-pressure safety device |
| CN108462156B (en) * | 2017-12-29 | 2019-07-02 | 深圳供电局有限公司 | A kind of over-pressure safety device |
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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: 20150708 Termination date: 20190209 |
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| CF01 | Termination of patent right due to non-payment of annual fee |