CN201611775U - Arc light monitoring and protecting device for bus compartment - Google Patents
Arc light monitoring and protecting device for bus compartment Download PDFInfo
- Publication number
- CN201611775U CN201611775U CN2010201040713U CN201020104071U CN201611775U CN 201611775 U CN201611775 U CN 201611775U CN 2010201040713 U CN2010201040713 U CN 2010201040713U CN 201020104071 U CN201020104071 U CN 201020104071U CN 201611775 U CN201611775 U CN 201611775U
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- light
- signal
- bus
- chip microcomputer
- arc
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Abstract
The utility model relates to an arc light monitoring and protecting device for a bus compartment, which is used for conducting arc light protection on a bus of a switch cabinet and comprises two light bands, a current signal collection circuit, a single chip microcomputer and a protection relay. The two light bands are respectively mounted at the inner sides of a front panel and a rear panel of a protected bus compartment; a light signal output by the light band is connected with a photoelectric converter which converts the light signal into an electric signal; both the electric signal and an electric signal output by the current signal collection circuit are connected to an AND gate circuit, and the output end of the AND gate circuit is connected with the P0.0 end of the single chip microcomputer; the protection relay controls a power supply breaker of a monitored bus, and a control coil of the protection relay is connected with the P1.0 end of the single chip microcomputer. The arc light monitoring and protecting device for a bus compartment not only has convenient mounting, but also can accurately and reliably detect arc light signals in the bus compartment, thus effectively avoiding the failure of operation and misoperation failure.
Description
Technical field
The utility model relates to a kind of device that the arclight fault of switch cubicle bus-bar room is monitored and protected of being used for, and 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 causality loss.
Existing mesolow switch cubicle arclight monitoring comes bus-bar room is carried out the arc light monitoring by arc probe with protection system; its principle is that an arc probe is installed on the dividing plate of bus-bar room; by arc probe the arc light collection in the bus-bar room is got up; by optical fiber light signal is sent to optical-electrical converter then; by optical-electrical converter light signal is converted to the signal of telecommunication again; microcontroller judges according to this signal whether bus-bar room exists arc fault, and the output control signal makes the relay protection circuit action.The investigative range of arc probe is wider, but same light source is positioned at the arc probe when being the diverse location of same sphere at center, and the illuminance that arc probe collects is different.For example in Fig. 1, much lower when the illuminance that arc probe collected when light source was in the B point is in the A point than light source, so the probe mounting position directly has influence on the setting of arc light setting value.Because on-the-spot concrete installation situation complexity, probe installation location is various, so the on-the-spot setting of arc light setting value is more loaded down with trivial details, precision also decreases, if choice of location is improper, can not accurately survey arc optical signal when breaking down, and the tripping phenomenon takes place easily.
In addition, existing arc light monitoring makes a distinction with light signal and the external interference light signal that protective device can not effectively produce inner arc fault, causes the generation of misoperation easily.
The utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, provide a kind of can accurately survey arc optical signal, is difficult for taking place the monitoring of bus-bar room arc light and the protective device of tripping and malfunction.
Problem described in the utility model realizes with following technical proposals:
A kind of bus-bar room arc light monitoring and protective device, it comprises light belt, current signal Acquisition Circuit, single-chip microcomputer and protection relay, described light belt is provided with two, be installed in protected bus compartment front and back panel inboard respectively, the light signal of light belt output connects optical-electrical converter, convert the signal of telecommunication to by the latter, the signal of telecommunication of the signal of telecommunication and the output of current signal Acquisition Circuit all is connected to AND gate circuit, and latter's output connects the P0.0 end of single-chip microcomputer; Described protection relay is controlled the power circuit breaker of monitored bus, and the control coil of protection relay connects the P1.0 end of single-chip microcomputer.
Above-mentioned bus-bar room arc light monitoring and protective device; described current signal Acquisition Circuit by three current transformers and first or the door form; described three current transformers connect three phase lines of monitored bus-bar room respectively; their signal output part behind a signal conditioning circuit, connect respectively first or the door three inputs, described first or the door output be the signal output part of current signal Acquisition Circuit.
Above-mentioned bus-bar room arc light monitoring and protective device; also comprise the arc fault warning circuit in the formation; described arc fault warning circuit by second or the door and the LED alarm lamp form; described second or three inputs of door connect the signal of telecommunication that the two path signal that two ways of optical signals converted to that two light belts export and current signal Acquisition Circuit are exported respectively; output connects the P0.1 end of single-chip microcomputer, and described LED alarm lamp connects the P1.1 end of single-chip microcomputer.
The utility model utilizes two light belts that are installed in protected bus compartment front and back panel inboard respectively to gather arc optical signal in the compartment, and two light belts are signal collected just constitutes effective arc fault signal after AND operation.Because compartment seals, also can only be one-sided light even external light source shines in the compartment by the slit, two light belts have one to monitor external optical signals at most, and at this moment protective device can malfunction; And when compartment interior was short-circuited fault generation arc light, two light belts will monitor light signal simultaneously, thereby guarantee this device action message.Because the light signal that any point receives on the light belt surface can reach the termination, has improved investigative range of this device and the precision that luminous sensitivity is adjusted greatly, avoids the protective device tripping.The utility model is not only easy for installation, and can survey the arc optical signal in the bus-bar room accurately and reliably, effectively prevents protective device tripping and malfunction.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is the structure and the scheme of installation of arc probe in the prior art;
Fig. 2 is an electrical schematic diagram of the present utility model.
Each label is among the figure: 1, bus-bar room dividing plate; 2, arc probe; 3, optical fiber; 4, connector; G1, G2, light belt; H1, H2, optical-electrical converter; P1, P2, level adjusting circuit; CT1, CT2, CT3, current transformer; TL1, TL2, TL3, signal conditioning circuit; U1, U2, with the door; U3, single-chip microcomputer; U4, first or the door; U5, second or the door; J, protection relay; LED, alarm lamp.
Embodiment
The utility model adopts light belt to gather the bus-bar room arc optical signal, light belt be light sensitive component be again the media of optical transmission.Light belt can not only be collected light signal at its cross cut end (of a beam), can accept light signal and transfer to the termination at the lip-deep any point of light belt.Every light belt surface all seems to have installed numerous small sensitive probe, and the detection range of light is increased greatly, has avoided the formation at monitoring dead angle.Light belt has good pliability, and the illuminance in the light belt investigative range is evenly distributed.
Referring to Fig. 2, the input of the termination optical-electrical converter H1 (H2) of light belt G1 (G2), optical-electrical converter H1 (H2) converts the light signal that light belt G1 (G2) is exported to the signal of telecommunication, P1 (P2) is a level adjusting circuit, U1, U2 are two and door, the signal of two light belt collections is input to the input of U2 after U1 carries out AND operation, carry out AND operation with signal from the current signal Acquisition Circuit.Three current transformer CT1, CT2, CT3 gather the bus three-phase current signal, TL1, TL2, TL3 are signal conditioning circuit, the line level of the AC signal rectification that CT1, CT2, CT3 gather can being gone forward side by side is regulated, three-phase current signal first or door U4 in be input to U2 after carrying out inclusive-OR operation and arc optical signal carries out AND operation.
When arc fault occurring, single-chip microcomputer makes the bus outage by P1.0 end output trip signal, prevents that fault from further enlarging.Alarm lamp LED lights simultaneously, sends alarm signal.As seen from Figure 2, when alarm lamp LED lights, arc fault is arranged not necessarily, might abnormal current or a certain light belt received light signal and caused, at this moment even without tripping operation, also tackle switch cubicle and overhaul.
Claims (3)
1. a bus-bar room arc light is monitored and protective device, it is characterized in that, it comprises light belt, current signal Acquisition Circuit, single-chip microcomputer (U3) and protection relay (J), described light belt is provided with two, be installed in protected bus compartment front and back panel inboard respectively, the light signal of light belt output connects optical-electrical converter, converts the signal of telecommunication to by the latter, the signal of telecommunication of the signal of telecommunication and the output of current signal Acquisition Circuit all is connected to AND gate circuit, and latter's output connects the P0.0 end of single-chip microcomputer (U3); The power circuit breaker of the monitored bus of described protection relay (J) control, the control coil of protection relay connect the P1.0 end of single-chip microcomputer (U3).
2. according to described bus-bar room arc light monitoring of claim 1 and protective device; it is characterized in that; described current signal Acquisition Circuit by three current transformers and first or the door (U4) form; described three current transformers connect three phase lines of monitored bus-bar room respectively; their signal output part behind a signal conditioning circuit, be connected to respectively first or the door (U4) three inputs, described first or the door (U4) output be the signal output part of current signal Acquisition Circuit.
3. according to described bus-bar room arc light monitoring of claim 2 and protective device; it is characterized in that; it also comprises the arc fault warning circuit; described arc fault warning circuit by second or door (U5) and LED alarm lamp form; described second or three inputs of door (U5) connect the signal of telecommunication that the two path signal that two ways of optical signals converted to that two light belts export and current signal Acquisition Circuit are exported respectively; output connects the P0.1 end of single-chip microcomputer (U3), and described LED alarm lamp connects the P1.1 end of single-chip microcomputer (U3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201040713U CN201611775U (en) | 2010-01-29 | 2010-01-29 | Arc light monitoring and protecting device for bus compartment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201040713U CN201611775U (en) | 2010-01-29 | 2010-01-29 | Arc light monitoring and protecting device for bus compartment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201611775U true CN201611775U (en) | 2010-10-20 |
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ID=42962410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201040713U Expired - Fee Related CN201611775U (en) | 2010-01-29 | 2010-01-29 | Arc light monitoring and protecting device for bus compartment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201611775U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102684152A (en) * | 2012-06-09 | 2012-09-19 | 上海臻和防雷电气技术有限责任公司 | Special fault electric arc detection arc-extinguishing device for photovoltaic confluence |
| CN111381120A (en) * | 2018-12-29 | 2020-07-07 | 比亚迪股份有限公司 | Photoelectric induction detection method and circuit applied to high-voltage parts |
-
2010
- 2010-01-29 CN CN2010201040713U patent/CN201611775U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102684152A (en) * | 2012-06-09 | 2012-09-19 | 上海臻和防雷电气技术有限责任公司 | Special fault electric arc detection arc-extinguishing device for photovoltaic confluence |
| CN102684152B (en) * | 2012-06-09 | 2014-12-10 | 上海臻和防雷电气技术有限责任公司 | Special fault electric arc detection arc-extinguishing device for photovoltaic confluence |
| CN111381120A (en) * | 2018-12-29 | 2020-07-07 | 比亚迪股份有限公司 | Photoelectric induction detection method and circuit applied to high-voltage parts |
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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: 20101020 Termination date: 20160129 |
|
| EXPY | Termination of patent right or utility model |