CN201690265U - PLC relay switching dual power supply - Google Patents
PLC relay switching dual power supply Download PDFInfo
- Publication number
- CN201690265U CN201690265U CN2010201192735U CN201020119273U CN201690265U CN 201690265 U CN201690265 U CN 201690265U CN 2010201192735 U CN2010201192735 U CN 2010201192735U CN 201020119273 U CN201020119273 U CN 201020119273U CN 201690265 U CN201690265 U CN 201690265U
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- power supply
- relay
- programme
- stand
- main contacts
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Abstract
The utility model relates to a PLC relay switching dual power supply which belongs to power transmission and distribution equipment technical field. The dual power supply comprises two power incoming wires, the main contacts of contactors controlled by the PLC relay supply power for the in-service and spare power incoming wires; the main contacts of the contactors of the in-service and spare power incoming wires are locked with each other; voltage relay coils are respectively connected among phases of the in-service and spare power incoming wires; the corresponding ports of the input end of the PLC relay are respectively connected with the voltage relay contacts, and the corresponding ports of the output end are respectively connected with an intermediate relay for controlling the main contacts of the contactors of the in-service and spare power incoming wires. Therefore, the PLC relay can monitor the interphase voltage of the two power supply incoming wires to judge the operating state, and further carries out power supply switching as needed according to the preset program; the PLC relay switching dual power supply has the advantages of simple setting, convenient use and low cost.
Description
Technical field
The utility model relates to a kind of control supply unit, and especially a kind of control relay conversion duplicate supply able to programme belongs to the equipment for power transmission and distribution technical field.
Background technology
Along with economic development, people are more and more higher to the requirement of power supply reliability.The important events that hospital, market, bank, chemical industry, skyscraper, military installations, fire-fighting etc. do not allow to cut off the power supply all require to be equipped with the two-way power supply and guarantee the reliability of powering, and this just needs a kind of device that can reliably change between the two-way power supply.
Other people understand according to application, have generally used dual-power transfer switch in the low-voltage power supply system.When normal power source power supply outlet fault, can automatically switch to stand-by power supply and carry out work.Yet, not only can provide very rare at present, and it costs an arm and a leg greater than the dual-power transfer switch of 3200A, can not be by programming control flexibly.
The utility model content
The utility model wants the technical solution problem to be: at the problem that above prior art exists, propose a kind of control relay conversion duplicate supply able to programme, thereby by programming in logic, realize required power source conversion control flexibly.
In order to solve above technical problem, control relay conversion duplicate supply able to programme of the present utility model comprises the two-way electric power incoming line, and described using always with the stand-by power supply inlet wire powered by the contactor main contacts that is controlled by control relay able to programme respectively; The contactor main contacts interlocking of described commonly used and stand-by power supply inlet wire; The alternate voltage relay coil that is connected to respectively of described commonly used and stand-by power supply inlet wire; The corresponding port of described control relay input able to programme is each voltage relay contact respectively, and the corresponding port of output connects the auxiliary relay of controlling commonly used and stand-by power supply inlet wire contactor main contacts respectively.
Like this, control relay able to programme can be judged its operating state according to the monitoring of two electric power incoming line voltages between phases, and then according to preset program, controls required power supply and switch, and its significant advantage is: be provided with simple, easy to use, with low cost.
The utility model further improves, and the corresponding port of described control relay input able to programme also connects described respectively and commonly used and the synchronous auxilliary contact of stand-by power supply inlet wire contactor main contacts.Therefore can monitor the on off operating mode of commonly used and stand-by power supply inlet wire, guarantee power supply safety.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further described.
Fig. 1 is the primary system figure of an embodiment of the utility model.
Fig. 2 is the alternate circuit diagram of supply line commonly used of Fig. 1 embodiment.
Fig. 3 is the alternate circuit diagram of stand-by power supply circuit of Fig. 1 embodiment.
Fig. 4 is the circuit theory diagrams of the control relay part able to programme of Fig. 1 embodiment.
Embodiment
Embodiment one
Figure 1 shows that the primary system figure of duplicate supply conversion, power supply C commonly used provides normal working voltage, and when power supply C outlet fault commonly used, B drops into automatically by standby voltage.When power supply C commonly used recovers just often, stand-by power supply B disconnects, and power supply C commonly used drops into (according to the actual requirements, also can select not runback, promptly still by the stand-by power supply power supply) automatically.
Commonly used and stand-by power supply inlet wire is powered QF1 and QF2 interlocking by contactor main contacts QF1 and the QF2 that is controlled by control relay able to programme respectively.Commonly used and stand-by power supply inlet wire alternate with Fig. 2, shown in Figure 3 is connected to voltage relay coil KA1, KA2 and KA3, KA4 respectively.Control relay able to programme as shown in Figure 4, the corresponding port of input meets each voltage relay contact KA1, KA2 and KA3, KA4 respectively, with commonly used and synchronous auxilliary contact QF1, the QF2 of stand-by power supply inlet wire contactor main contacts, and and change over switch SA and manual control button SB1, SBT1, SB2, SBT2.The corresponding port of its output meets auxiliary relay KM1, the KM2 of control electric power incoming line contactor main contacts commonly used and auxiliary relay KM3, the KM4 of control stand-by power supply inlet wire contactor main contacts respectively.
Voltage relay contact KA1, the KA2 of above-mentioned mains side commonly used and voltage relay contact KA3, the KA4 of stand-by power supply side are that threshold value is all adjustable.When both sides voltage was undesired, voltage relay can provide the switching value signal.The auxiliary contact of QF1 and QF2 can provide the divide-shut brake signal of switch, and SB1, SBT1, SB2, SBT2 are respectively the manual divide-shut brake button of QF1 and QF2, when change over switch is selected manual mode, and the manual divide-shut brake of available buttons.Auxiliary relay KM1～KM4 is used for control switch divide-shut brake coil.Relay able to programme is by preset program, and response drives KM1～KM4, realizes the duplicate supply conversion of double switch.
This shows that the duplicate supply control of present embodiment is convenient, applying flexible, thus can apply conscientiously.
Claims (3)
1. a control relay conversion duplicate supply able to programme comprises the two-way electric power incoming line, it is characterized in that: described using always with the stand-by power supply inlet wire powered by the contactor main contacts that is controlled by control relay able to programme respectively; The contactor main contacts interlocking of described commonly used and stand-by power supply inlet wire; The alternate voltage relay coil that is connected to respectively of described commonly used and stand-by power supply inlet wire; The corresponding port of described control relay input able to programme is each voltage relay contact respectively, and the corresponding port of output connects the auxiliary relay of controlling commonly used and stand-by power supply inlet wire contactor main contacts respectively.
2. control relay conversion duplicate supply able to programme according to claim 1, it is characterized in that: the corresponding port of described control relay input able to programme also connects described respectively and commonly used and the synchronous auxilliary contact of stand-by power supply inlet wire contactor main contacts.
3. control relay conversion duplicate supply able to programme according to claim 2, it is characterized in that: the corresponding port of described control relay input able to programme also connects conversion switch and manual control button.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201192735U CN201690265U (en) | 2010-02-26 | 2010-02-26 | PLC relay switching dual power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201192735U CN201690265U (en) | 2010-02-26 | 2010-02-26 | PLC relay switching dual power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201690265U true CN201690265U (en) | 2010-12-29 |
Family
ID=43378542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201192735U Expired - Fee Related CN201690265U (en) | 2010-02-26 | 2010-02-26 | PLC relay switching dual power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201690265U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102842951A (en) * | 2011-06-24 | 2012-12-26 | 北京市电力公司 | Low voltage loop-closing selective-tripping system |
| CN103136999A (en) * | 2012-12-04 | 2013-06-05 | 海宁市供电局 | Simulation demonstrator used for training remote electric load control function |
| CN105337401A (en) * | 2015-11-24 | 2016-02-17 | 王容 | Intelligent double-power switching system |
-
2010
- 2010-02-26 CN CN2010201192735U patent/CN201690265U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102842951A (en) * | 2011-06-24 | 2012-12-26 | 北京市电力公司 | Low voltage loop-closing selective-tripping system |
| CN102842951B (en) * | 2011-06-24 | 2014-12-10 | 国家电网公司 | Low voltage loop-closing selective-tripping system |
| CN103136999A (en) * | 2012-12-04 | 2013-06-05 | 海宁市供电局 | Simulation demonstrator used for training remote electric load control function |
| CN103136999B (en) * | 2012-12-04 | 2014-12-10 | 海宁市供电局 | Simulation demonstrator used for training remote electric load control function |
| CN105337401A (en) * | 2015-11-24 | 2016-02-17 | 王容 | Intelligent double-power switching system |
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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: 20101229 Termination date: 20140226 |