CN204515039U - Fault detector - Google Patents
Fault detector Download PDFInfo
- Publication number
- CN204515039U CN204515039U CN201520168943.5U CN201520168943U CN204515039U CN 204515039 U CN204515039 U CN 204515039U CN 201520168943 U CN201520168943 U CN 201520168943U CN 204515039 U CN204515039 U CN 204515039U
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- Prior art keywords
- microprocessor
- fault detector
- power supply
- exports
- wave filtering
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Abstract
The utility model relates to a kind of fault detector, comprise housing and be installed in the Circuits System in this housing, this Circuits System comprises microprocessor, the detection current rectifying and wave filtering circuit of described microprocessor is given for output detections direct current signal, for providing in-line power output as the battery of the working power of described microprocessor, for exporting the power supply current rectifying and wave filtering circuit of power supply direct current signal, externally fed for being converted to by described power supply direct current signal exports DC/DC translation circuit, to export for selecting described externally fed or powered battery exports as the commutation circuit of the working power of this microprocessor.The utility model can select externally fed output as the working power of this microprocessor, can extend the serviceable life of fault detector.
Description
Technical field
The utility model relates to electric power network equipment, particularly the monitoring equipment of electric power network cable.
Background technology
Fault detector is arranged on distribution line, is used for judging short trouble or the earth fault of distribution line.Current fault detector generally includes housing and is installed in the Circuits System in this housing, as shown in Figure 1, this Circuits System comprises microprocessor 3, detection current rectifying and wave filtering circuit 2 and battery 4, wherein this detection current rectifying and wave filtering circuit 2 is connected with the secondary side current output terminal of current transformer 1, give this microprocessor 3 with output detections direct current signal, this battery 4 can provide working power for this microprocessor 3.This fault detector structure, adopt disposable battery to power, circuit board and cell integrated property encapsulating are in housing, and volume is generally less.But affect by volume, limited battery capacity, serviceable life is limited.Particularly in high/low temperature situation, battery capacity impact is serious, and such as: rated capacity is the battery of 2.6AH, temperature influence curve, when environment temperature is-20 °, battery capacity can be reduced to 0.4AH.Visible, in this changing environment, the life-span of fault detector will reduce greatly.
Utility model content
The technical problems to be solved in the utility model is to avoid the weak point that in prior art, factor receptor sum battery capacity limits so that serviceable life is limited, the utility model proposes a kind of fault detector, can effectively extend its serviceable life.
For the above-mentioned technical matters that will solve, the technical scheme that the utility model adopts is as follows:
A kind of fault detector is provided, comprise housing and be installed in the Circuits System in this housing, this Circuits System comprises microprocessor, for output detections direct current signal to the detection current rectifying and wave filtering circuit of described microprocessor and for providing in-line power to export as the battery of the working power of described microprocessor; Described Circuits System also comprises: for exporting the power supply current rectifying and wave filtering circuit of power supply direct current signal, be connected with the secondary side current output terminal of described current transformer; Externally fed for being converted to by described power supply direct current signal exports DC/DC translation circuit; For selecting the output of described externally fed or in-line power output as the commutation circuit of the working power of this microprocessor, be electrically connected with DC/DC translation circuit, battery and microprocessor respectively.
Further, described commutation circuit comprises voltage checking chip, diode and MOS gauge tap, wherein, described diode is serially connected in described externally fed and exports and between the power supply of commutation circuit exports, the source electrode of described MOS gauge tap and drain electrode are serially connected in described in-line power and export and between the power supply of described commutation circuit exports, the detection input end of described voltage checking chip exports with described externally fed and is connected, and the detection output terminal of described voltage checking chip is connected with the grid of described MOS gauge tap.
Further, the model of described voltage checking chip is XC61C30.
Further, described DC/DC translation circuit comprises boost chip and MOS gauge tap.
Further, the model of described boost chip is XC9140.
Further, described power supply current rectifying and wave filtering circuit comprises commutation diode and filter capacitor.
Further, described detection current rectifying and wave filtering circuit is by comprising commutation diode and filter capacitor.
Compared with prior art, the technique effect of the utility model fault detector is: by setting up power supply current rectifying and wave filtering circuit, DC/DC translation circuit and commutation circuit, externally fed can be utilized under general situation, and only just utilize battery to carry out in-line power under given conditions, greatly can reduce the power demands of battery, thus effectively extend the serviceable life of fault detector.
Accompanying drawing explanation
Fig. 1 is the structural schematic block diagram of Circuits System in existing fault detector.
Fig. 2 is the structural schematic block diagram of Circuits System in fault detector of the present utility model.
Fig. 3 is the circuit diagram of detection current rectifying and wave filtering circuit and power supply current rectifying and wave filtering circuit in fault detector of the present utility model.
Fig. 4 is the circuit diagram of DC/DC translation circuit in fault detector of the present utility model.
Fig. 5 is the circuit diagram of commutation circuit in fault detector of the present utility model.
Embodiment
Now by reference to the accompanying drawings, embodiment of the present utility model is elaborated.
Fault detector of the present utility model comprises housing and is installed in the Circuits System in this housing.See Fig. 2 to Fig. 5, this Circuits System comprises microprocessor 3, detection current rectifying and wave filtering circuit 2, battery 4, power supply current rectifying and wave filtering circuit 5, DC/DC translation circuit 6 and commutation circuit 7.
As shown in Figure 2, detection current rectifying and wave filtering circuit 2 is connected with the secondary side current output terminal of current transformer 1, to export a detection direct current signal to microprocessor 3.See Fig. 3, detection current rectifying and wave filtering circuit 2 is made up of commutation diode D1 and filter capacitor CT1.Detection direct current signal U1 is the joining being taken from this commutation diode D1 and filter capacitor CT1.In the present embodiment, for the measurement of small area analysis, the primary side current of current transformer 1 is mA level; The secondary side current of current transformer 1 is uA level.In other embodiments, detection current rectifying and wave filtering circuit 2 can be full-wave rectification or other rectifier system.
An input port of microprocessor 3 is used for catching this detection direct current signal U1.This microprocessor 3 judges line fault according to this detection direct current signal U1.
Battery 4 can provide an in-line power to export the working power being used as this microprocessor 3.
Power supply current rectifying and wave filtering circuit 5 is also connected with the secondary side current output terminal of current transformer 1, to export a power supply direct current signal to this microprocessor 3.See Fig. 3, this power supply current rectifying and wave filtering circuit 5 is made up of commutation diode D2 and filter capacitor CT2.Power supply direct current signal U2 is the joining being taken from this commutation diode D2 and filter capacitor CT2.In other embodiments, this power supply current rectifying and wave filtering circuit 5 can be full-wave rectification or other rectifier system.It is worth mentioning that, because the electric current of power taking load is much smaller than the electric current gathering load, the measurement of small area analysis can not be had influence on.
DC/DC translation circuit 6 exports in order to described power supply direct current signal U2 to be converted to externally fed.See Fig. 4, this DC/DC translation circuit 6 is formed primarily of boost chip U7 and MOS gauge tap Q6.In the present embodiment, the model of this boost chip U7 adopts XC9140.This MOS gauge tap Q6 is in order to control the work of this boost chip U7.
The magnitude of voltage that externally fed that commutation circuit 7 can provide according to this DC/DC translation circuit 6 exports an and relation setting threshold value selects this externally fed to export or this in-line power exports working power as this microprocessor 3.See Fig. 5, this commutation circuit 7 is formed primarily of voltage checking chip U9, diode D9 and MOS gauge tap Q8.Specifically, this diode D9 is serially connected in this externally fed and exports and the power supply of this commutation circuit 7 exports between VCC.The source electrode of MOS gauge tap Q8 and drain electrode are serially connected in this in-line power output (i.e. the positive pole of battery) and power supply exports between VCC.The detection input end VIN of voltage checking chip U9 exports with externally fed and is connected, and the detection output terminal VOUT of voltage checking chip U9 is connected with the grid of MOS gauge tap Q8.In the present embodiment, the model of voltage checking chip U9 adopts XC61C30.The ratings of the working power (i.e. VCC) of microprocessor 3 is 3.0V; This setting threshold value is 2.8V.When line load exceedes certain value, the stable output of boost chip U7 is at+3V, and the working power VCC of this microprocessor 3 is powered by+3V, and when the output of boost chip U7 is lower than 2.8V, the working power VCC of this microprocessor 3 is powered by battery BAT.This structure, can ensure powers at battery BAT and external electricity rationally switches.
Fault detector of the present utility model, by setting up power supply current rectifying and wave filtering circuit 5, DC/DC translation circuit 6 and commutation circuit 7, externally fed can be utilized under general situation, and only just utilize battery 4 to carry out in-line power under given conditions, greatly can reduce the power demands of battery 4, thus effectively can extend the serviceable life of fault detector.
Should be understood that, above embodiment only in order to the technical solution of the utility model to be described, is not intended to limit, for a person skilled in the art, technical scheme described in above-described embodiment can be modified, or equivalent replacement is carried out to wherein portion of techniques feature; And these amendments and replacement, all should belong to the protection domain of the utility model claim.
Claims (7)
1. a fault detector, comprise housing and be installed in the Circuits System in this housing, this Circuits System comprises microprocessor, for output detections direct current signal to the detection current rectifying and wave filtering circuit of described microprocessor and for providing in-line power to export as the battery of the working power of described microprocessor; It is characterized in that, described Circuits System also comprises:
For exporting the power supply current rectifying and wave filtering circuit of power supply direct current signal, be connected with the secondary side current output terminal of current transformer;
For described power supply direct current signal being converted to the DC/DC translation circuit that externally fed exports;
For selecting the output of described externally fed or in-line power output as the commutation circuit of the working power of this microprocessor, be electrically connected with DC/DC translation circuit, battery and microprocessor respectively.
2. fault detector according to claim 1, it is characterized in that, described commutation circuit comprises voltage checking chip, diode and MOS gauge tap, wherein, described diode is serially connected in described externally fed and exports and between the power supply of commutation circuit exports, the source electrode of described MOS gauge tap and drain electrode are serially connected in described powered battery and export and between system power supply exports, the detection input end of described voltage checking chip exports with described externally fed and is connected, and the detection output terminal of described voltage checking chip is connected with the grid of described MOS gauge tap.
3. fault detector according to claim 2, is characterized in that, the model of described voltage checking chip is XC61C30.
4. fault detector according to claim 1, is characterized in that, described DC/DC translation circuit comprises boost chip and MOS gauge tap.
5. fault detector according to claim 4, is characterized in that, the model of described boost chip is XC9140.
6. fault detector according to claim 1, is characterized in that, described power supply current rectifying and wave filtering circuit comprises commutation diode and filter capacitor.
7. fault detector according to claim 1, is characterized in that, described detection current rectifying and wave filtering circuit comprises commutation diode and filter capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520168943.5U CN204515039U (en) | 2015-03-25 | 2015-03-25 | Fault detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520168943.5U CN204515039U (en) | 2015-03-25 | 2015-03-25 | Fault detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204515039U true CN204515039U (en) | 2015-07-29 |
Family
ID=53712998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520168943.5U Expired - Fee Related CN204515039U (en) | 2015-03-25 | 2015-03-25 | Fault detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204515039U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110138077A (en) * | 2019-05-06 | 2019-08-16 | 江苏金智科技股份有限公司 | A kind of interruption switching circuit of backup battery zero of fault detector |
-
2015
- 2015-03-25 CN CN201520168943.5U patent/CN204515039U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110138077A (en) * | 2019-05-06 | 2019-08-16 | 江苏金智科技股份有限公司 | A kind of interruption switching circuit of backup battery zero of fault detector |
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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: 20150729 Termination date: 20200325 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |