CN201629565U - Switch cabinet arc light protection system with compact structure - Google Patents
Switch cabinet arc light protection system with compact structure Download PDFInfo
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- CN201629565U CN201629565U CN2010201110468U CN201020111046U CN201629565U CN 201629565 U CN201629565 U CN 201629565U CN 2010201110468 U CN2010201110468 U CN 2010201110468U CN 201020111046 U CN201020111046 U CN 201020111046U CN 201629565 U CN201629565 U CN 201629565U
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- protection system
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Abstract
A switch cabinet arc light protection system with a compact structure is mainly used for solving the problem of integration of an arc light protection system. The technical scheme includes that the protection system comprises a main control unit, an arc light probe and an optical fiber. The main control unit comprises a casing and a monitoring circuit mounted therein, and a photoelectric converter, a current signal terminal, a trip signal terminal and a power supply terminal are arranged on the casing, connected with the monitoring circuit and all fixed onto a rear wall plate of the casing. The arc light probe is mounted on a partition board of a bus chamber of a switch cabinet, an output end of the arc light probe is connected with an input end of the photoelectric converter via the plastic optical fiber, and the current signal terminal is externally connected with a current transformer. The protection system with a compact structure greatly reduces wire connection failure among units, eliminates interference from external powerful electromagnetic field, is capable of effectively preventing incorrect acting or acting rejection of devices, and greatly improves reliability of the integral protection system.
Description
Technical field
The utility model relates to a kind of improved mesolow switch cubicle arclight protection system, belongs to the resist technology field.
Background technology
The inner arc fault of switch cubicle is a kind of very serious short trouble in the distribution system, if do not take to monitor timely and effectively and safeguard measure, tends to cause serious economy loss.Therefore, arclight monitoring and protection system need be installed all in switch cubicle, further spread to prevent the arclight fault.
Existing mesolow switch cubicle arclight protection system is judged arc fault according to overcurrent and the dual criterion of arclight, generally is made up of a plurality of split type functional units such as arc probe, arc optical signal processing unit, current transformer, current signal processing unit, control unit, accessory power supplys.Annexation between each separate unit as shown in Figure 1, the arc optical signal processing unit is connected with arc probe by plastic fiber, its receives the detected arc optical signal of arc probe and by communication optical fiber and data cable this signal is transferred to control unit; The current signal processing unit directly is connected with current transformer terminal on the switch cubicle by cable, is used for detecting constantly A, B, C three-phase overcurrent signal, and detected overcurrent signal is transferred to control unit by communication optical fiber and data cable; The input of accessory power supply is connected with on-the-spot AC power, and it converts field power supply to DC12V, is the control unit power supply by cable then; Control unit management, the whole arclight protection system of control; the arc optical signal that fault current signal that its received current signal processing unit transmits and arc optical signal processing unit transmit is also handled to the received signal, is judged; when satisfying trip condition, send trip command, with the excision arc fault.
Because a plurality of functional units are independently of one another; optical fiber, number of cables between them are more; and be exposed in the switch cubicle compartment; thereby occur easily becoming flexible, come off, by phenomenons such as worm, damaged by rats are disconnected; communication cable and each functional unit are easy to be interfered in the strong-electromagnetic field environment; cause error action of device or tripping, this just greatly reduces the reliability of whole protecting system.
The utility model content
The purpose of this utility model is the switch cubicle arclight protection system of the compact conformation that overcomes the deficiencies in the prior art, a kind of high reliability is provided.
Problem described in the utility model realizes with following technical proposals:
A kind of switch cubicle arclight protection system of compact conformation, it is made up of main control unit, arc probe and optical fiber, described main control unit is made up of casing and installation supervisory circuit within it, described casing is provided with optical-electrical converter, current signal terminal, trip signal terminal and the power supply terminal that is connected with supervisory circuit, and described trip signal terminal, power supply terminal, optical-electrical converter, current signal terminal all are fixed on the squab panel of casing; Described arc probe is installed on the dividing plate of switch cubicle bus-bar room, and its output connects the input of optical-electrical converter, current transformer in the described current signal terminal outside connected switch cabinet through plastic fiber.
The switch cubicle arclight protection system of said structure compactness, described supervisory circuit is made up of current signal processing unit, arc optical signal processing unit, single-chip microcomputer, relay and accessory power supply, the input of described current signal processing unit is connected with current signal terminal on the casing, output connects the input of single-chip microcomputer, the output of the input termination optical-electrical converter of described arc optical signal processing unit, the input of the described accessory power supply power supply terminal on the shell of meeting sb. at the airport; Described current signal processing unit, arc optical signal processing unit, single-chip microcomputer, relay and accessory power supply are installed on the interior circuit board of casing; The control coil of described relay connects the output of single-chip microcomputer, and the contact connects the trip signal terminal.
The utility model all is installed on current signal processing unit, arc optical signal processing unit, single-chip microcomputer, relay and accessory power supply on the circuit board in the casing of main control unit, the transmission of signal between each unit adopts basically that fixedly connected mode realizes on the device internal circuit board, not only significantly reduced the line fault between each unit, and simplified on-the-spot wiring process, reduced the on-site installation work amount.The casing of main control unit can effectively shield the interference of outside strong-electromagnetic field to inner each unit, prevents error action of device or tripping, has improved the reliability of whole protecting system greatly.
Description of drawings,
The utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is the composition and the connection diagram of traditional electrical arc light protection system;
Fig. 2 is a structured flowchart of the present utility model;
Fig. 3 is the layout plan of inner each unit of main control unit.
Each label is among the figure: 1, casing; 2, arc optical signal processing unit; 3, current signal processing unit; 4, single-chip microcomputer; 5, relay; 6, accessory power supply; 7, trip signal terminal; 8, power supply terminal; 9, current signal terminal; 10, optical-electrical converter.
Embodiment
Referring to Fig. 2, Fig. 3, the utility model product is made up of main control unit, arc probe and optical fiber three parts.Main control unit fits together a plurality of split type unit of traditional electrical arc light protection system, has all functions of split type each unit.
The main control unit input voltage is DC110V/AC220V, and 8 direct connections with the field power supply terminal of power supply terminal get final product.The AC220V power supply is inserted by power supply terminal, changes direct voltage into through accessory power supply 6 (being made of miniature transformer and rectification circuit), gives single-chip microcomputer 4, current signal processing unit 3,2 power supplies of arc optical signal processing unit.
Main control unit current signal terminal 9 can directly link to each other with the current transformer terminal by cable, and the current signal that current signal processing unit 3 is gathered need not to carry out complicated processing can send into single-chip microcomputer 4.
Optical-electrical converter 10 directly is connected with arc probe by optical fiber, monitors the arclight signal constantly.Electric arc optical signals optical-electrical converter 10 enters into single-chip microcomputer 4 through arc optical signal processing unit 2.
Main control unit will be from the over-current signal of current transformer and the arclight signal synthesis processing controls relay trip(ping) circuit of arc probe collection.
Claims (2)
1. the switch cubicle arclight protection system of a compact conformation, it is characterized in that, it is made up of main control unit, arc probe and optical fiber, described main control unit is made up of casing (1) and installation supervisory circuit within it, described casing (1) is provided with optical-electrical converter (10), current signal terminal (9), trip signal terminal (7) and the power supply terminal (8) that is connected with supervisory circuit, and described trip signal terminal, power supply terminal, optical-electrical converter, current signal terminal all are fixed on the squab panel of casing; Described arc probe is installed on the dividing plate of switch cubicle bus-bar room, and its output connects the input of optical-electrical converter (10), current transformer in described current signal terminal (9) the outside connected switch cabinet through plastic fiber.
2. according to the switch cubicle arclight protection system of the described compact conformation of claim 1, it is characterized in that, described supervisory circuit is by current signal processing unit (3), arc optical signal processing unit (2), single-chip microcomputer (4), relay (5) and accessory power supply (6) are formed, the input of described current signal processing unit (3) is connected with current signal terminal (9) on the casing, output connects the input of single-chip microcomputer (4), the output of the input termination optical-electrical converter (10) of described arc optical signal processing unit (2), the input of described accessory power supply (6) power supply terminal (8) on the shell (1) of meeting sb. at the airport; Described current signal processing unit, arc optical signal processing unit, single-chip microcomputer, relay and accessory power supply are installed on the interior circuit board of casing; The control coil of described relay (5) connects the output of single-chip microcomputer (4), and the contact connects trip signal terminal (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201110468U CN201629565U (en) | 2010-02-10 | 2010-02-10 | Switch cabinet arc light protection system with compact structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201110468U CN201629565U (en) | 2010-02-10 | 2010-02-10 | Switch cabinet arc light protection system with compact structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201629565U true CN201629565U (en) | 2010-11-10 |
Family
ID=43060964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201110468U Expired - Fee Related CN201629565U (en) | 2010-02-10 | 2010-02-10 | Switch cabinet arc light protection system with compact structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201629565U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103248017A (en) * | 2013-05-15 | 2013-08-14 | 南京弘毅电气自动化有限公司 | 100-percent fast protection system and method for internal fault of switch cabinet |
| CN103441473A (en) * | 2013-08-14 | 2013-12-11 | 合肥天海电气技术有限公司 | Arc light protection system suitable for single-bus section |
-
2010
- 2010-02-10 CN CN2010201110468U patent/CN201629565U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103248017A (en) * | 2013-05-15 | 2013-08-14 | 南京弘毅电气自动化有限公司 | 100-percent fast protection system and method for internal fault of switch cabinet |
| CN103248017B (en) * | 2013-05-15 | 2015-12-23 | 南京弘毅电气自动化有限公司 | Internal faults of switch cabinet 100% rapid protection system and guard method |
| CN103441473A (en) * | 2013-08-14 | 2013-12-11 | 合肥天海电气技术有限公司 | Arc light protection system suitable for single-bus section |
| CN103441473B (en) * | 2013-08-14 | 2016-03-30 | 合肥天海电气技术有限公司 | A kind of arc light protecting system being applicable to single mother partition |
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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: 20101110 Termination date: 20160210 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |