CN103501043A - Low-voltage dual-power circuit based on PLC (Programmable Logic Controller) - Google Patents
Low-voltage dual-power circuit based on PLC (Programmable Logic Controller) Download PDFInfo
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- CN103501043A CN103501043A CN201310479329.6A CN201310479329A CN103501043A CN 103501043 A CN103501043 A CN 103501043A CN 201310479329 A CN201310479329 A CN 201310479329A CN 103501043 A CN103501043 A CN 103501043A
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Abstract
The invention discloses a low-voltage dual-power circuit based on a PLC (Programmable Logic Controller). The low-voltage dual-power circuit comprises a main power module, a standby power module, a PLC default phase detection module, a load circuit module and an overvoltage and undervoltage detection module, wherein the current output end of the main power module is connected with the current input end of the PLC default phase detection module; the current output end of the standby power module is connected with the current input end of the PLC default phase detection module; the PLC default phase detection module comprises two signal output ends and one current output end; the two signal output ends are connected with the two signal input ends of the overvoltage and undervoltage detection module; the current output end of the PLC default phase detection module is connected with the current input end of the load circuit module. According to the low-voltage dual-power circuit, automatic change and automatic recovery of a dual-power switch can be realized, and default phase protection and overvoltage and undervoltage protection are realized.
Description
Technical field
The present invention relates to a kind ofly based on PLC low-voltage dual power circuit, belong to the electrical control field.
Background technology
Electric power system usually relies on power cabinet to carry out electricity and carries, and usually on bus, is distributed with a plurality of loads, power supply by bus to each load supplying.In power supply process, due to accident or burst accident, after power supply buses breaks down, each confession electric loading that power supply buses connects will be affected, electricity consumption normally.
Along with people require more and more higher to power supply reliability, a lot of occasions need to guarantee with the two-way power supply reliability of power supply, this reliably switches between the two-way power supply with regard to a kind of duplicate supply switch of needs, aspect electric automatization, has broad application prospects and very large market fence power.
The two-supply circuit that has at present handoff functionality does not have open-phase protection, over-and under-voltage and switch to haul oneself willingly into the functions such as runback.When arbitrary phase or two-phase phase shortage occur when; the over-and under-voltage fault perhaps occurs; because control system does not have phase shortage to detect and protection switching measure; cause the trouble power of phase shortage not cut off; the normal power supply power supply can not drop in time; there is no again corresponding signal prompt, can cause so the long-time phase-deficient operation of load, cause serious consequence.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides a kind ofly based on PLC low-voltage dual power circuit, can realize the runback of hauling oneself willingly into of twin-power switch, realize phase shortage and overvoltage/undervoltage protection.
Technical scheme: for achieving the above object, technical scheme of the present invention is as follows:
A kind of based on PLC low-voltage dual power circuit, comprise main power source module, standby power supply module, PLC open phase detection module, load circuit module and overvoltage and under-voltage detection module, the current output terminal of described main power source module is connected with the current input terminal of PLC open phase detection module, and the current output terminal of standby power supply module is connected with the current input terminal of PLC open phase detection module; Described PLC open phase detection module comprises two signal output parts and a current output terminal, described two signal output parts are connected with two signal input parts of under-voltage detection module with overvoltage respectively, and the current output terminal of PLC open phase detection module is connected with the current input terminal of load circuit module.
Beneficial effect: the present invention, by two power modules are connected with the PLC open phase detection module, by overvoltage and under-voltage detection module, judges whether power supply breaks down, thereby selects power available to be powered to the load circuit module.Utilize the PLC functional module, can realize the accurate detection to supply voltage, from and can realize the under-voltage and overvoltage of power supply is detected.Can be more applicable for the enterprise that electricity consumption is had relatively high expectations.
The accompanying drawing explanation
Accompanying drawing 1 is structured flowchart of the present invention.
Embodiment
Below in conjunction with accompanying drawing, 1 couple of the present invention is further described.
As shown in Figure 1, a kind of based on PLC low-voltage dual power circuit, comprise main power source module 1, standby power supply module 2, PLC open phase detection module 3, load circuit module 4 and overvoltage and under-voltage detection module 5, the current output terminal of described main power source module 1 is connected with the current input terminal of PLC open phase detection module 3, and the current output terminal of standby power supply module 2 is connected with the current input terminal of PLC open phase detection module 3; Described PLC open phase detection module 3 comprises two signal output parts and a current output terminal, described two signal output parts are connected with two signal input parts of under-voltage detection module 5 with overvoltage respectively, and the current output terminal of PLC open phase detection module 3 is connected with the current input terminal of load circuit module 4.
The two-way current output terminal of main power source module 1 and standby power supply module 2 all can be to 4 power supplies of load circuit module.During normal operation, only have 4 power supplies of 1 pair of load circuit module of main power source module, standby power supply module 2 is as stand-by power supply; When main power source module 1 breaks down, perhaps detect main power source 1 when phase shortage, under-voltage or overvoltage, PLC open phase detection module 3 and overvoltage and under-voltage detection module 5 can detect fast, and the confession of cutting off main power source module 1 is electrically connected to, detect standby power supply module 2, confirm not have out of order the time, enable standby power supply module 2.When PLC open phase detection module 3 and overvoltage and under-voltage detection module 5 detect main power source module 1 and recover normal, cut off standby power supply module 2 power supplies, connect main power source module 1 power supply.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (1)
1. one kind based on PLC low-voltage dual power circuit, it is characterized in that: comprise main power source module (1), standby power supply module (2), PLC open phase detection module (3), load circuit module (4) and overvoltage and under-voltage detection module (5), the current output terminal of described main power source module (1) is connected with the current input terminal of PLC open phase detection module (3), and the current output terminal of standby power supply module (2) is connected with the current input terminal of PLC open phase detection module (3); Described PLC open phase detection module (3) comprises two signal output parts and a current output terminal, described two signal output parts are connected with two signal input parts of under-voltage detection module (5) with overvoltage respectively, and the current output terminal of PLC open phase detection module (3) is connected with the current input terminal of load circuit module (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310479329.6A CN103501043A (en) | 2013-10-14 | 2013-10-14 | Low-voltage dual-power circuit based on PLC (Programmable Logic Controller) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310479329.6A CN103501043A (en) | 2013-10-14 | 2013-10-14 | Low-voltage dual-power circuit based on PLC (Programmable Logic Controller) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103501043A true CN103501043A (en) | 2014-01-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310479329.6A Pending CN103501043A (en) | 2013-10-14 | 2013-10-14 | Low-voltage dual-power circuit based on PLC (Programmable Logic Controller) |
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| CN (1) | CN103501043A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104377804A (en) * | 2014-10-14 | 2015-02-25 | 苏州克兰兹电子科技有限公司 | Control system of PLC controllable dual-power switch |
| CN108429338A (en) * | 2018-04-03 | 2018-08-21 | 河南森源电气股份有限公司 | Prepared auto restart control method, backup auto-activating device and system |
-
2013
- 2013-10-14 CN CN201310479329.6A patent/CN103501043A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104377804A (en) * | 2014-10-14 | 2015-02-25 | 苏州克兰兹电子科技有限公司 | Control system of PLC controllable dual-power switch |
| CN108429338A (en) * | 2018-04-03 | 2018-08-21 | 河南森源电气股份有限公司 | Prepared auto restart control method, backup auto-activating device and system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140108 |