CN203232516U - Anti-theft alarm for power transformer - Google Patents
Anti-theft alarm for power transformer Download PDFInfo
- Publication number
- CN203232516U CN203232516U CN 201320104950 CN201320104950U CN203232516U CN 203232516 U CN203232516 U CN 203232516U CN 201320104950 CN201320104950 CN 201320104950 CN 201320104950 U CN201320104950 U CN 201320104950U CN 203232516 U CN203232516 U CN 203232516U
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- China
- Prior art keywords
- transformer
- connects
- power transformer
- alarm
- filter capacitor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- 239000003990 capacitor Substances 0.000 claims abstract description 22
- 238000012544 monitoring process Methods 0.000 claims abstract description 13
- 230000008878 coupling Effects 0.000 claims abstract description 12
- 238000010168 coupling process Methods 0.000 claims abstract description 12
- 238000005859 coupling reaction Methods 0.000 claims abstract description 12
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000001914 filtration Methods 0.000 abstract 3
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Abstract
An anti-theft alarm for a power transformer belongs to the technical field of signal devices. The technical scheme of the anti-theft alarm for the power transformer is as follows: the anti-theft alarm for the power transformer comprises a transformer monitoring circuit and an alarm circuit; the transformer monitoring circuit comprises a coupling capacitor, a rectifier diode, a filtering capacitor and a voltage stabilizing diode; and one end of the coupling capacitor is connected with a phase line of a secondary side of a monitored transformer, and the other end is connected with a zero line of the secondary side of the monitored transformer through the rectifier diode and the filtering capacitor in turn, the cathode of the voltage stabilizing diode is connected with a series point between the coupling capacitor and the rectifier diode, the anode is connected with the zero line of the secondary side of the monitored transformer, and a output voltage signal across the filtering capacitor is accessed to an input end of the alarm circuit. According to the anti-theft alarm for a power transformer, the transformer monitoring circuit is used to monitor an output voltage of the transformer, when the transformer is powered off because of being stolen or damaged, the transformer monitoring circuit outputs a control signal to allow the alarm circuit to send a sound and light alarm signal and inform operators on duty to timely take anti-theft measures, so that a loss of the power transformer is effectively prevented.
Description
Technical field
The utility model relates to a kind of device that can send the sound and light alarm signal when power transformer is destroyed or be stolen automatically, belongs to the telltale technical field.
Background technology
Power transformer is modal equipment in the supply network, suffer robber's destruction easily, especially those are installed in the spacious or remote position of comparison, nurse is the power transformer of difficulty relatively, the preferred object of lawless person theft especially, in case transformer is stolen, will cause enormous economic loss.Therefore how to prevent effectively that power transformer is stolen, be the problem that the relevant personnel study always.
The utility model content
The purpose of this utility model is to provide a kind of electric power transformer anti-theft alarm, the larceny that makes the operator on duty can in time obtain the stolen information of transformer and prevent the lawless person.
Problem described in the utility model realizes with following technical proposals:
A kind of electric power transformer anti-theft alarm, it comprises transformer monitoring circuit and warning circuit, described transformer monitoring circuit comprises coupling capacitance, commutation diode, filter capacitor and voltage stabilizing diode, a phase line of the monitored Circuit Fault on Secondary Transformer of described coupling capacitance one termination, the other end connects monitored Circuit Fault on Secondary Transformer zero line through commutation diode and filter capacitor successively, the negative electrode of described voltage stabilizing diode connects the serial connection point of coupling capacitance and commutation diode, anode connects monitored Circuit Fault on Secondary Transformer zero line, the input end of the voltage signal circuit taking alarm of filter capacitor two ends output.
Above-mentioned electric power transformer anti-theft alarm, described warning circuit comprises battery, audible-visual annunciator, two triodes and two resistance, the base stage of first triode connects the filter capacitor positive pole through first resistance, emitter connects filter capacitor negative pole and battery cathode, collector connects anode through second resistance, the base stage of second triode connects the collector of first triode, and collector connects anode, and emitter connects battery cathode through audible-visual annunciator.
Above-mentioned electric power transformer anti-theft alarm also comprises isolating diode in the formation, the output voltage of filter capacitor charges the battery through isolating diode.
Above-mentioned electric power transformer anti-theft alarm, described audible-visual annunciator are connected in parallel by alarm lamp and hummer and form.
The utility model utilizes the output voltage of transformer monitoring circuit monitoring transformer, when transformer because of stolen or destroyed when cutting off the power supply, transformer monitoring circuit output control signal, make warning circuit send the sound and light alarm signal, notify the operator on duty in time to take anti-theft measure, thereby effectively avoided losing of power transformer.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is electrical schematic diagram of the present utility model.
Each list of reference numerals is among the figure: B, battery, DW, voltage stabilizing diode, BL, alarm lamp, FM, hummer, D1, commutation diode, D2, isolating diode, Q1, first triode, Q2, second triode, C1, coupling capacitance, C2, filter capacitor, R1, first resistance, R2, second resistance.
Embodiment
Referring to Fig. 1, the utility model comprises transformer monitoring circuit and warning circuit, wherein, the transformer monitoring circuit is made up of coupling capacitance C1, filter capacitor C2, voltage stabilizing diode DW and commutation diode D1, and warning circuit is made up of battery B, alarm lamp BL, hummer FM, the first triode Q1, the second triode Q2, first resistance R 1 and second resistance R 2.
Under the normal condition, monitored Circuit Fault on Secondary Transformer has voltage output, this voltage is given filter capacitor C2 charging through coupling capacitance C1 and commutation diode D1, DC voltage on the filter capacitor C2 is added in the base stage of the first triode Q1 through first resistance R 1, make the first triode Q1 conducting, so the base potential of the second triode Q2 is dragged down, the second triode Q2 ends, and alarm lamp BL and hummer FM do not work.
When transformer was stolen, the robber must cut off earlier transformer primary side power supply, so its low-voltage circuit has a power failure, the first triode Q1 is become by conducting and ends, and the second triode Q2 is by by becoming conducting, and alarm lamp BL lights, and hummer FM sends chimes of doom.Voltage stabilizing diode DW plays clamping action; Isolating diode D2 has two effects, and the one, B provides charge circuit for battery, and the 2nd, isolate the positive pole of battery B and the base stage of the first triode Q1, guarantee that civil power one stops, the first triode Q1 turns to and ends.Because the utility model adopts the power alarm mode, so not only when transformer is stolen, report to the police, break down at transformer and also can report to the police when having a power failure.
Claims (4)
1. electric power transformer anti-theft alarm, it is characterized in that, it comprises transformer monitoring circuit and warning circuit, described transformer monitoring circuit comprises coupling capacitance (C1), commutation diode (D1), filter capacitor (C2) and voltage stabilizing diode (DW), a phase line of the monitored Circuit Fault on Secondary Transformer of described coupling capacitance (C1) termination, the other end connects monitored Circuit Fault on Secondary Transformer zero line through commutation diode (D1) and filter capacitor (C2) successively, the negative electrode of described voltage stabilizing diode (DW) connects the serial connection point of coupling capacitance (C1) and commutation diode (D1), anode connects monitored Circuit Fault on Secondary Transformer zero line, the input end of the voltage signal circuit taking alarm of filter capacitor (C2) two ends output.
2. a kind of electric power transformer anti-theft alarm according to claim 1, it is characterized in that, described warning circuit comprises battery (B), audible-visual annunciator, two triodes and two resistance, the base stage of first triode (Q1) connects filter capacitor (C2) positive pole through first resistance (R1), emitter connects filter capacitor (C2) negative pole and battery (B) negative pole, collector connects battery (B) positive pole through second resistance (R2), the base stage of second triode (Q2) connects the collector of first triode (Q1), collector connects battery (B) positive pole, and emitter connects battery (B) negative pole through audible-visual annunciator.
3. a kind of electric power transformer anti-theft alarm according to claim 2 is characterized in that, also comprises isolating diode (D2) in the formation, and the output voltage of filter capacitor (C2) is given battery (B) charging through isolating diode (D2).
4. a kind of electric power transformer anti-theft alarm according to claim 3 is characterized in that, described audible-visual annunciator is connected in parallel by alarm lamp (BL) and hummer (FM) and forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320104950 CN203232516U (en) | 2013-03-08 | 2013-03-08 | Anti-theft alarm for power transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320104950 CN203232516U (en) | 2013-03-08 | 2013-03-08 | Anti-theft alarm for power transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203232516U true CN203232516U (en) | 2013-10-09 |
Family
ID=49288626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320104950 Expired - Fee Related CN203232516U (en) | 2013-03-08 | 2013-03-08 | Anti-theft alarm for power transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203232516U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106197709A (en) * | 2016-08-15 | 2016-12-07 | 成都众山科技有限公司 | A kind of can DTU broken string alarm temperature transmitter |
-
2013
- 2013-03-08 CN CN 201320104950 patent/CN203232516U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106197709A (en) * | 2016-08-15 | 2016-12-07 | 成都众山科技有限公司 | A kind of can DTU broken string alarm temperature transmitter |
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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: 20131009 Termination date: 20180308 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |