CN201590656U - Current unit of photoelectric arc light protection system - Google Patents
Current unit of photoelectric arc light protection system Download PDFInfo
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- CN201590656U CN201590656U CN2009202950183U CN200920295018U CN201590656U CN 201590656 U CN201590656 U CN 201590656U CN 2009202950183 U CN2009202950183 U CN 2009202950183U CN 200920295018 U CN200920295018 U CN 200920295018U CN 201590656 U CN201590656 U CN 201590656U
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Abstract
The utility model relates to a current unit of a photoelectric arc light protection system, and aims to achieve the technical purpose that the provided current unit of the photoelectric arc light protection system can meet the quantity extension and cascade connection of current detection interfaces in the photoelectric arc light protection system, so as to ensure the logic operability of trips of the protection system under different operation conditions. In order to achieve the purpose, the utility model adopts the technical scheme that the current unit of the photoelectric arc light protection system is provided with a programmable logic controller (PLC), wherein two input pins of the controller are connected with a trip signal input interface and a data signal input interface respectively, another group of input pins of the controller are connected with a group of current transformer input interfaces, and two output pins of the PLC are connected with a trip signal output interface and a data signal output interface respectively. The utility model is mainly applied to the current signal detection of photoelectric arc light protection systems in the power industry.
Description
Technical field
The utility model relates to a kind of current unit of photoelectric type arclight protection system, is applicable to that the current signal in the photoelectric type arclight protection system detects in the power industry.
Background technology
Show that according to early stage foreign statistic data annual per 1000 switch cubicles just have 7 to be damaged, failure rate 0.7%.The probability of rural power distribution net is higher, reaches 1.2%.According to " communication of high-voltage switch gear technology ", singly be the handcart cabinet, China's electric power system year just has 200 multiaspect cabinets to burn.Because the attention of national governments and relevant mandatory file, rules regulation, the Medium voltage switch or circuit breaker on ground such as the Soviet Union and America and Europe is installed bus and is protected ratio fast, surpasses 95%.External famous switch cubicle manufacturer, as Reyrolle, ABB, Siemens, Schneider, Moeller, Holec etc., wherein low-tension switch cabinet all has supporting use arclight protection system.
In recent years, along with the high speed development of domestic power industry, the number of applications of Medium Voltage Switchgear is more and more, because the middle pressure busbar fault that switch cubicle arc short-circuit fault causes is also increasing; On the other hand; the user is also more and more higher to the reliability requirement of power supply; more domestic experts also emphasize to install the importance of special-purpose middle voltage bus bar protection always; the user wishes also to provide that a kind of cost is lower, principle simple, is applicable to the bus protection of 3KV～35KV; to reduce the infringement of busbar fault to greatest extent, improve power supply reliability to equipment.Under this background, the arclight protection system begins accelerated development in China's application on power system.
Following damaged condition under the various arcing times of external data introduction equipment being caused:
35ms: not significant the damage, generally can behind the check insulation resistance, come into operation.
100ms: damage lessly, before switch cubicle puts into operation once more, need to clean or some possible little repairing.
500ms: device damage is very serious, and personnel at the scene also are subjected to serious injury, must just can put into operation by removable parts equipment again.
As how the fastest speed breaking arc fault is the important topic that will study at present.
Summary of the invention
The technical problems to be solved in the utility model is: the current unit that a kind of photoelectric type arclight protection system is provided; to satisfy the current detecting interface quantity expansion in the photoelectric type arclight protection system and the requirement of cascade, guarantee the operability of protection system Trip Logic under different ruuning situations.
The technical scheme that the utility model adopted is: the current unit of photoelectric type arclight protection system, it is characterized in that: described current unit has the PLC programmable logic controller (PLC), an input pin of this controller connects the trip signal input interface that is used for the tripping operation output signal of other current units of cascade or arc light unit and converts the standard logic signal to, another input pin of this controller connects and is used for other current units of cascade or the power data of arc light unit output or the data-signal input interface of alert data, and this controller also has one group of input pin to connect the current transformer input interface that one group of secondary current conversion of signals that current transformer is transmitted becomes the standard logic signal; Two output pins of described PLC programmable logic controller (PLC) connect trip signal output interface and data-signal output interface respectively.
One group of control pin of described PLC programmable logic controller (PLC) is connected to the address setting toggle switch.This controller is connected to reset switch.
Described current transformer is the current transformer of 1A or 5A.
The beneficial effects of the utility model are: are the medium transmission data 1), guaranteed the response time of arclight protection system minimum, shortened the trip time greatly with optical fiber and data wire, and can the fastest arclight protection system of supporting present responsiveness; 2) the address setting toggle switch that connects on the PLC programmable logic controller (PLC) can be set the address of current unit, when protection system in when operation change of address more, main control unit can search out correct address automatically; 3) the utility model has satisfied the current detecting interface quantity expansion in the photoelectric type arclight protection system and the requirement of cascade, has solved that current detecting interface quantity in the photoelectric type arclight protection system is expanded and the logic function of cascade.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
As shown in Figure 1; the utility model is the current unit of photoelectric type arclight protection system; it has a PLC programmable logic controller (PLC) 6 (CR-PLC) that is used for deal with data; an input pin of this controller connects trip signal input interface 1, and this interface is used for the tripping operation output signal of other current unit of cascade or arc light unit and is converted to the standard logic signal passing to the PLC processing.Another input pin of this controller connects data-signal input interface 2, and this interface is the differential signal input interface, is used for the power data or the alert data of other current units of cascade or arc light unit and passes to the PLC processing.PLC programmable logic controller (PLC) 6 also has one group of input pin to connect one group of current transformer input interface 8, passes to PLC again after this interface is used for becoming the standard logic signal by logical combination the secondary current conversion of signals that current transformer (current transformer that can mate 1A or 5A) transmits and handles.Two output pins of PLC programmable logic controller (PLC) 6 are connected to trip signal output interface 4 and data-signal output interface 5 respectively.
One group of control pin of described PLC programmable logic controller (PLC) 6 is connected to address setting toggle switch 3, is used to set the address of current unit, when protection system in when operation change of address more, the main control unit of protection system can search out correct address automatically.The PLC programmable logic controller (PLC) also is connected to reset switch 7, is used for the hand-reset of current unit.
Operation principle of the present utility model is: external current transformer will detect to such an extent that the secondary current signal is passed to current transformer input interface 8, current transformer input interface 8 is passed to PLC programmable logic controller (PLC) 6 after the conversion of signals of receiving is become the standard logic signal again, PLC handles the back and generates trip signal and data-signal, respectively by trip signal output interface 5 and 4 outputs of data-signal output interface.Equally, trip signal is imported through trip signal input interface 1 in current unit or arc light unit as other cascade, when data-signal input interface 2 input data signals, PLC equally also can handle these signals, and result is by trip signal output interface 5 and 4 outputs of data-signal output interface.
Introduction by structure of the present utility model and operation principle; the over-current adjusting scope can be regulated by the potentiometer on the current unit panel in addition; as can be seen: the utility model can make the Trip Logic variation in the photoelectric type arclight protection system, thus effective protection switch equipment.
Claims (4)
1. the current unit of a photoelectric type arclight protection system, it is characterized in that: described current unit has PLC programmable logic controller (PLC) (6), an input pin of this controller connects the trip signal input interface (1) that is used for the tripping operation output signal of other current units of cascade or arc light unit and converts the standard logic signal to, another input pin of this controller connects and is used for other current units of cascade or the power data of arc light unit output or the data-signal input interface (2) of alert data, and this controller also has one group of input pin to connect the current transformer input interface (8) that one group of secondary current conversion of signals that current transformer is transmitted becomes the standard logic signal; Two output pins of described PLC programmable logic controller (PLC) (6) connect trip signal output interface (5) and data-signal output interface (4) respectively.
2. the current unit of photoelectric type arclight protection system according to claim 1 is characterized in that: one group of control pin of described PLC programmable logic controller (PLC) (6) is connected to address setting toggle switch (3).
3. the current unit of photoelectric type arclight protection system according to claim 1 is characterized in that: described PLC programmable logic controller (PLC) (6) is connected to reset switch (7).
4. according to the current unit of claim 1 or 2 or 3 described photoelectric type arclight protection systems, it is characterized in that: described current transformer is the current transformer of 1A or 5A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202950183U CN201590656U (en) | 2009-12-25 | 2009-12-25 | Current unit of photoelectric arc light protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202950183U CN201590656U (en) | 2009-12-25 | 2009-12-25 | Current unit of photoelectric arc light protection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201590656U true CN201590656U (en) | 2010-09-22 |
Family
ID=42750450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202950183U Expired - Fee Related CN201590656U (en) | 2009-12-25 | 2009-12-25 | Current unit of photoelectric arc light protection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201590656U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103812082A (en) * | 2012-11-08 | 2014-05-21 | 李品德 | Novel arc light protection system |
-
2009
- 2009-12-25 CN CN2009202950183U patent/CN201590656U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103812082A (en) * | 2012-11-08 | 2014-05-21 | 李品德 | Novel arc light protection 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: 20100922 Termination date: 20121225 |