CN201623473U - Bus-bar room arc light monitoring and protective device of high reliability - Google Patents
Bus-bar room arc light monitoring and protective device of high reliability Download PDFInfo
- Publication number
- CN201623473U CN201623473U CN201029160013XU CN201029160013U CN201623473U CN 201623473 U CN201623473 U CN 201623473U CN 201029160013X U CN201029160013X U CN 201029160013XU CN 201029160013 U CN201029160013 U CN 201029160013U CN 201623473 U CN201623473 U CN 201623473U
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- bus
- door
- light
- signal
- chip microcomputer
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Abstract
Provided is a bus-bar room arc light monitoring and protective device of high reliability, used for protecting the bus of switch cabinet from short circuit. The technical scheme of the utility model is that it comprises a light band, a AND gate, a current signal acquisition circuit, a single-chip microcomputer and a protective relay. The light band is arranged on the inner wall of a bus compartment being protected, and the optical signal output from the light band, after being converted into an electrical signal by a photoelectric converter, is connected to one input end of the AND gate. The other input end of the AND gate is connected to the output end of the current signal acquisition circuit, and the output end is connected to the P0.0 end of the single-chip microcomputer. The protective relay controls the power supply breaker of the bus being monitored, and the search coil of the protective relay is connected to P1.0 end of the single-chip microcomputer. The utility model has advantages of having convenient installation and setting, accurately and reliably detecting the fault-signal of arc light in bus-bar room, having high .
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 economy loss.
Existing mesolow switch cubicle arclight monitoring comes bus-bar room is carried out the arc light monitoring by arc probe with protection system; it is that an arc probe is installed on the dividing plate of bus-bar room; by arc probe the partial arc in the bus-bar room is compiled; 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 the current signal of this signal summation current transformer collection whether bus-bar room exists arc fault, and the control signal of output relay protective circuit.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 the site specific 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 is also lower, if choice of location is improper, can not accurately survey arc optical signal when breaking down, and the tripping phenomenon takes place easily.
The utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, a kind of monitoring of bus-bar room arc light and protective device that is easy to install and set and be difficult for taking place the high reliability of tripping is provided.
Problem described in the utility model realizes with following technical proposals:
A kind of monitoring of bus-bar room arc light and protective device of high reliability; comprise in the formation light belt, with door, current signal Acquisition Circuit, single-chip microcomputer and protection relay; described light belt is installed on the protected bus compartment inwall; the light signal that it is exported connects an input with door after optical-electrical converter converts the signal of telecommunication to; the output of another input termination current signal Acquisition Circuit of described and door; output connects the P0.0 end of single-chip microcomputer; described protection relay is controlled the power circuit breaker of monitored bus, and its control coil connects the P1.0 end of single-chip microcomputer.
The monitoring of bus-bar room arc light and the protective device of above-mentioned high reliability; 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 the output termination with the door input.
The monitoring of bus-bar room arc light and the protective device of above-mentioned high reliability; also comprise the arclight failure alarm circuit in the formation; described arclight failure alarm circuit by second or the door and the LED alarm lamp form; described second or two inputs of door connect the signal of telecommunication that light signal converted to and first or the output of door of light belt output 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 light belt that the utility model utilization is installed on the bus compartment side walls is gathered the interior arc optical signal of compartment; because the light signal that any point receives on the light belt surface can reach the termination; improve investigative range of this device and the precision that luminous sensitivity is adjusted greatly, effectively avoided the protective device tripping.It is convenient that the utility model is installed, set, and can survey the arclight fault-signal in the bus-bar room accurately and reliably, has very high reliability.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is the scheme of installation of arc probe;
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; G, light belt; H, optical-electrical converter; P, level adjusting circuit; CT1, CT2, CT3, current transformer; TL1, TL2, TL3, signal conditioning circuit; U1, single-chip microcomputer; U2, with the door; U3, first or the door; U4, 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.The 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. 1, the input of the termination optical-electrical converter H of light belt G, optical-electrical converter H converts the light signal that light belt G is exported to the signal of telecommunication, P is a level adjusting circuit, U2 is and door, the output signal of P connects an input with door U2, carries 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 U3 in be input to door U2 and arc optical signal after carrying out inclusive-OR operation and carry 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 1, when alarm lamp LED lights, arc fault is arranged not necessarily, might abnormal current or light belt received the stray light signal and caused, at this moment even without tripping operation, also tackle switch cubicle and overhaul.
Claims (3)
1. the bus-bar room arc light of a high reliability is monitored and protective device; it is characterized in that; device comprises light belt (G) in constituting; with door (U2); the current signal Acquisition Circuit; single-chip microcomputer (U1) and protection relay (J); described light belt (G) is installed on the protected bus compartment inwall; the light signal that it is exported connects an input with door (U2) after optical-electrical converter (H) converts the signal of telecommunication to; the output of another input termination current signal Acquisition Circuit of described and door (U2); output connects the P0.0 end of single-chip microcomputer (U1); the power circuit breaker of the monitored bus of described protection relay (J) control, its control coil connect the P1.0 end of single-chip microcomputer (U1).
2. monitor and protective device according to the bus-bar room arc light of the described high reliability of claim 1; it is characterized in that; described current signal Acquisition Circuit by three current transformers and first or the door (U3) 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 (U3) three inputs, described first or the door (U3) the output termination with the door (U2) input.
3. monitor and protective device according to the bus-bar room arc light of claim 1 or 2 described high reliability; it is characterized in that; also comprise the arc fault warning circuit in the formation; described arc fault warning circuit by second or door (U4) and LED alarm lamp form; described second or two inputs of door (U4) connect the signal of telecommunication that light signal converted to and first or the output of door (U3) of light belt (G) output respectively; output connects the P0.1 end of single-chip microcomputer (U1), and described LED alarm lamp connects the P1.1 end of single-chip microcomputer (U1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201029160013XU CN201623473U (en) | 2010-02-08 | 2010-02-08 | Bus-bar room arc light monitoring and protective device of high reliability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201029160013XU CN201623473U (en) | 2010-02-08 | 2010-02-08 | Bus-bar room arc light monitoring and protective device of high reliability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201623473U true CN201623473U (en) | 2010-11-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201029160013XU Expired - Fee Related CN201623473U (en) | 2010-02-08 | 2010-02-08 | Bus-bar room arc light monitoring and protective device of high reliability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201623473U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103854913A (en) * | 2013-09-05 | 2014-06-11 | 上海华明电力设备制造有限公司 | Isolation switch arc detection mechanism and safety protection device for vacuum on-load tapping switch |
-
2010
- 2010-02-08 CN CN201029160013XU patent/CN201623473U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103854913A (en) * | 2013-09-05 | 2014-06-11 | 上海华明电力设备制造有限公司 | Isolation switch arc detection mechanism and safety protection device for vacuum on-load tapping switch |
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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: 20101103 Termination date: 20150208 |
|
| EXPY | Termination of patent right or utility model |