CN201812022U - Monitoring device for harmful electric arc of power system - Google Patents
Monitoring device for harmful electric arc of power system Download PDFInfo
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- CN201812022U CN201812022U CN2009203523180U CN200920352318U CN201812022U CN 201812022 U CN201812022 U CN 201812022U CN 2009203523180 U CN2009203523180 U CN 2009203523180U CN 200920352318 U CN200920352318 U CN 200920352318U CN 201812022 U CN201812022 U CN 201812022U
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Abstract
The utility model provides a monitoring device for harmful electric arcs of a power system, belonging to electric fireproof safety monitoring field in a low-voltage electric system. The utility model aims at solving the problem that the serial harmful electric arcs or parallel short-circuit type harmful electric arcs can not be monitored when occurring in the power system; most of electric arcs occur at the positions such as joints, terminals, switch contacts and the like of wires and are not easy to discover by a user in general, therefore, the electric arcs can not be processed and maintained in time; and after a long time, the harmful electric arcs can be reinforced and possibly ignite the nearby combustibles, thus causing electric fire disaster. By utilizing the characteristic that the serial electric arcs can cause unstable current in a power wire, the current measurement is carried out at a measuring point, thus judging whether the serial harmful electric arcs exist in the power wire; and by utilizing the characteristic that the parallel harmful electric arcs are that a fire wire discharges to the ground to cause unstable voltages at two ends of the power wire, the voltage is monitored between the fire wire and the ground, thus judging whether the parallel harmful electric arcs exist in the power wire. Besides the two methods, by utilizing the characteristic that the harmful electric arcs generate a great deal of broad-spectrum radio waves when occurring, a broad-spectrum radio wave receiver is used for auxiliary judgment so that the monitoring on the harmful electric arcs can be more accurate and effective. The figure shows that the installation situation of a harmful electric-arc monitor in the power system; the broken line frame shows the constitution block layout of the harmful electric arc monitor; the monitoring device is characterized by consisting of a serial harmful electric arc current measuring circuit 1.
Description
Technical field: the harmful Electric arc monitoring device of electric system belongs to the electric fireproof safety monitoring technology in the low-voltage electric system.Its objective is to solve the current problem that after the harmful electric arc of the inner generation of power system tandem type or the harmful electric arc of parallel connection short circuit type, can't monitor, thereby solve the danger that prevents and reduce the electrical fire generation.
Background technology: because harmful electric arc of electric system inside mostly occurs in the positions such as joint, terminal or switch contact of electric wire, cable and copper bar, people are not easy to find generally speaking, so can not in time handle and keep in repair, after time grown, harmful electric arc increases near the combustible just may igniting gradually, thereby causes electrical fire.Case to the electrical fire that taken place is analyzed, and can see, because the case of the harmful electric arc initiation fire in the power system is too numerous to enumerate.Through test, when the live wire generation earth fault in the power system, only there is the 200mA electric current just can produce harmful electric arc, even being installed, the leakage fire watch-dog also is difficult to monitor.When occurring the harmful electric arc of series connection in the circuit, because of live wire short circuit not over the ground, the electric leakage watch-dog has no way of finding this hidden danger especially.
Through repeatedly in internet and patented technology index, retrieving, up to the present, the method that does not also have discovery in electric system harmful electric arc effectively to be monitored, the utility model provide brand-new solution to monitoring harmful electric arc in electric system.
Summary of the invention:
The utility model designs for this difficult problem of harmful electric arc that solves monitoring power system inside, it is characterized in that: can cause the unsettled characteristics of electric current because the harmful electric arc of series connection has change at random, so just can judge whether to exist the harmful electric arc of series connection by the Changing Pattern of electric current on the measure traverse line;
Because harmful electric arc in parallel is discharged over the ground by live wire form, harmful electric arc in parallel can cause the instability of voltage between live wire and the zero line, so just can judge whether to exist harmful electric arc in parallel with the Changing Pattern of measuring voltage between live wire and the zero line;
Except above two kinds of means, can produce the characteristics of a large amount of wide spectrum radio waves when utilizing electric arc to take place, carry out auxiliary judgment with the wide spectrum radio wave reception converter, can make the monitoring of harmful electric arc more accurate.
Description of drawings:
Fig. 1 is the schematic diagram that monitoring device for harmful electric arc is installed in power system, be the monitoring device for harmful electric arc composition frame chart in the frame of broken lines, it is characterized in that being harmful to arc current measuring circuit 1, harmful arc voltage measuring circuit 2 in parallel, the harmful electric arc radio wave reception circuit 3 of wide spectrum, harmful electric arc processing and warning circuit 4 by series connection forms.When the harmful electric arc of monitored power system generation serial or parallel connection, by the harmful arc detection circuitry of serial or parallel connection and the harmful electric arc radio wave reception circuit of wide spectrum simultaneously signal is transferred to that harmful electric arc is processed and warning circuit 4 in process, when surpassing alarm criteria, send alarm signal, remind the relevant personnel to process, prevent the generation of electrical fire.
Embodiment:
When if there is the loose contact situation in positions such as the joint of the cable of electric system, connection terminal, switch contact, be easy to take place the harmful electric arc of series connection, the harmful electric arc of series connection can cause the unsettled phenomenon of electric current in the line of electric force, so can find to exist in the line of electric force the harmful electric arc of series connection by measuring the series electrical flow valuve, and this signal passed to that harmful electric arc is handled and warning circuit 4 in handle;
Also may there be live wire earth fault or partial earth fault in the electric system, this can cause the instability with line of electric force end of incoming cables voltage, therefore the voltage of measuring the line of electric force end of incoming cables just can be found the existence of harmful electric arc in parallel, by the harmful electric arc metering circuit 2 of the parallel connection that is connected in parallel on the line of electric force two ends this signal is passed in harmful arc circuit processing and the warning circuit 4 and handles;
Harmful arc energy produces the harmful electric arc radio wave of a large amount of wide spectrums, utilize the harmful electric arc radio wave reception circuit 3 of wide spectrum to receive the electromagnetic wave that harmful electric arc produces, if the harmful electric arc of series connection or harmful arc signal in parallel surpass alarming value, and the signal of the harmful electric arc radio wave reception converter of wide spectrum also surpasses alarming value, then can determine really to exist in the power system harmful electric arc, report to the police at once, can avoid the generation of electrical fire.
Claims (4)
1. a monitoring device for harmful electric arc of power system is made up of the harmful arc current measuring circuit of series connection, harmful arc current measuring circuit in parallel and wide spectrum electric arc radio wave reception circuit etc.
2. electric system as claimed in claim 1 is harmful to the Electric arc monitoring device, it is characterized in that having the harmful flame current metering circuit of the series connection that is connected in the line of electric force inlet wire circuit.
3. electric system as claimed in claim 1 is harmful to the Electric arc monitoring device, it is characterized in that having the harmful flame current metering circuit of parallel connection at the live wire that is connected in parallel on the line of electric force inlet wire and zero line two ends.
4. electric system as claimed in claim 1 is harmful to the Electric arc monitoring device, it is characterized in that having the wide spectrum electric arc radiowave receiving circuit of the end of incoming cables that is connected line of electric force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203523180U CN201812022U (en) | 2009-12-23 | 2009-12-23 | Monitoring device for harmful electric arc of power system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203523180U CN201812022U (en) | 2009-12-23 | 2009-12-23 | Monitoring device for harmful electric arc of power system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201812022U true CN201812022U (en) | 2011-04-27 |
Family
ID=43894963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203523180U Expired - Fee Related CN201812022U (en) | 2009-12-23 | 2009-12-23 | Monitoring device for harmful electric arc of power system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201812022U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288863A (en) * | 2011-07-22 | 2011-12-21 | 北京海博智恒电气防火科技有限公司 | Device and method for detecting harmful electric arc in low-voltage power-supply system |
| CN107388588A (en) * | 2016-05-16 | 2017-11-24 | 青岛经济技术开发区海尔热水器有限公司 | One kind fire prevention electric heater and control method |
-
2009
- 2009-12-23 CN CN2009203523180U patent/CN201812022U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288863A (en) * | 2011-07-22 | 2011-12-21 | 北京海博智恒电气防火科技有限公司 | Device and method for detecting harmful electric arc in low-voltage power-supply system |
| CN107388588A (en) * | 2016-05-16 | 2017-11-24 | 青岛经济技术开发区海尔热水器有限公司 | One kind fire prevention electric heater and control method |
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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: 20110427 Termination date: 20121223 |