CN204858525U - Surge protector's protection controller - Google Patents
Surge protector's protection controller Download PDFInfo
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- CN204858525U CN204858525U CN201520465048.XU CN201520465048U CN204858525U CN 204858525 U CN204858525 U CN 204858525U CN 201520465048 U CN201520465048 U CN 201520465048U CN 204858525 U CN204858525 U CN 204858525U
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Abstract
The utility model provides a surge protector's protection controller relates to the communication power supply field. This protection controller includes: a current transformer, low pass filter circuit, first amplitude holding circuit, a AD converter, singlechip, amplifier and auxiliary relay, wherein, the power current signal is received to a current transformer's input to, low pass filter circuit, first amplitude holding circuit and a AD converter send the power current signal to the singlechip after handling in proper order, if the power current signal is greater than when presetting the threshold value, and singlechip output quick -break trip signal, the quick -break trip signal transmits to circuit breaker through amplifier and auxiliary relay, control circuit breaker automatic cutout circuit. The utility model discloses a SPD's power current value can real -time supervision be passed through to the embodiment, can send the quick -break trip signal to circuit breaker when this value is greater than boundary value threshold value on fire to eliminate hidden danger on fire.
Description
Technical field
The utility model relates to communication power supply field, refers to a kind of protection controller of surge protector especially.
Background technology
Usually in surge protector (SPD) branch road, only access the backup protection of a current limiting element as SPD failed shorted in current low-voltage distribution system, this current limiting element can be fuse or circuit breaker.
The lightning current that SPD releases there will be deterioration after reaching certain number of times, and electrical parameter performance is U
cvalue reduces, and works as U
cbe worth low to supply voltage time, the leakage current of SPD will sharply increase, and when the power frequency continuous current by SPD is greater than a threshold value (this value is less than current limiting element setting value, and SPD branch road can not disconnect), SPD will be on fire accidents caused.Have been found that the fire of section communication base station causes by SPD deterioration is on fire at present.How to avoid because SPD deterioration causes fire to become a major issue.
Utility model content
The purpose of this utility model is to provide a kind of protection controller of surge protector, and Real-Time Monitoring, by the power frequency electric flow valuve of SPD, can send quick-break trip signal to circuit breaker when this value is greater than boundary value threshold value on fire, thus eliminate hidden danger on fire.
For achieving the above object, embodiment of the present utility model provides a kind of protection controller of surge protector, the protection controller of described surge protector comprises: the first current transformer, low-pass filter circuit, first amplitude holding circuit, first A/D converter, single-chip microcomputer, amplifier and auxiliary relay, wherein, the output of described first current transformer is connected with the input of described low-pass filter circuit, the output of described low-pass filter circuit is connected with the input of described first amplitude holding circuit, the output of described first amplitude holding circuit is connected with the input of described first A/D converter, the output of described first A/D converter is connected with the first input end of described single-chip microcomputer, the output of described single-chip microcomputer is connected with the input of described amplifier, the output of described amplifier is connected with the input of described auxiliary relay, the output of described auxiliary relay is connected with the input of the circuit breaker of surge protector,
Wherein, the input of described first current transformer receives power frequency current signal, and described power frequency current signal is sent to described single-chip microcomputer after described low-pass filter circuit, described first amplitude holding circuit and described first A/D converter process successively, if when described power frequency current signal is greater than predetermined threshold value, described single-chip microcomputer exports quick-break trip signal, described quick-break trip signal is passed to described circuit breaker through described amplifier and described auxiliary relay, controls described circuit breaker automatic shutdown circuit.
Wherein, the protection controller of described surge protector also comprises: the second current transformer, high-pass filtering circuit, the second amplitude holding circuit, the second A/D converter, wherein, the output of described second current transformer is connected with the input of described high-pass filtering circuit, the output of described high-pass filtering circuit is connected with the input of described second amplitude holding circuit, the output of described second amplitude holding circuit is connected with the input of described second A/D converter, and the output of described second A/D converter is connected with the second input of described single-chip microcomputer;
Wherein, the input of described second current transformer receives high-frequency current signal, and described high-frequency current signal is sent to described single-chip microcomputer after described high-pass filtering circuit, described second amplitude holding circuit and the second A/D converter process successively, described single-chip microcomputer record receives number of times and the amplitude of described high-frequency current signal.
Wherein, described protection controller also comprises:
Be connected with the 3rd input of described single-chip microcomputer, for storing the memory of data.
Wherein, described protection controller also comprises:
Be connected with the four-input terminal of described single-chip microcomputer, for setting up the communication interface of the communication connection of power & environment supervision system in described single-chip microcomputer and base station.
Wherein, described communication interface is RS485 interface.
Wherein, described protection controller also comprises:
The independent clock be connected with the 5th input of described single-chip microcomputer.
The beneficial effect of technique scheme of the present utility model is as follows:
In such scheme, the power frequency current signal of surge protector is first through the first current transformer, low-pass filter circuit, first amplitude holding circuit and an A/D change-over circuit process, better to obtain power frequency current signal more clearly, and during the power frequency current signal of single-chip microcomputer after receiving process, just itself and predetermined threshold value can be compared, like this, once power frequency current signal is greater than predetermined threshold value, single-chip microcomputer will export quick-break trip signal, circuit breaker is passed to through amplifier and auxiliary relay, carry out control loop circuit breaker automatic shutdown circuit, avoid the excessive initiation fire accident of power current.
Accompanying drawing explanation
Fig. 1 represents the principle assumption diagram of the protection controller of the surge protector of the utility model embodiment.
Embodiment
For making the technical problems to be solved in the utility model, technical scheme and advantage clearly, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
The utility model is for the problem of existing surge protector by the excessive fire hazardous of power current; a kind of protection controller of surge protector is provided; Real-Time Monitoring is by the power frequency electric flow valuve of SPD; quick-break trip signal can be sent to circuit breaker when this value is greater than boundary value threshold value on fire, thus eliminate hidden danger on fire.
As shown in Figure 1, the protection controller of a kind of surge protector of the utility model embodiment, the protection controller of described surge protector comprises: the first current transformer, low-pass filter circuit, first amplitude holding circuit, first A/D converter, single-chip microcomputer, amplifier and auxiliary relay, wherein, the described output of the first current transformer is connected with the input of low-pass filter circuit, the output of described low-pass filter circuit is connected with the input of described first amplitude holding circuit, the output of described first amplitude holding circuit is connected with the input of described first A/D converter, the output of described first A/D converter is connected with the first input end of described single-chip microcomputer, the output of described single-chip microcomputer is connected with the input of described amplifier, the output of described amplifier is connected with the input of described auxiliary relay, the output of described auxiliary relay is connected with the input of the circuit breaker of surge protector,
Wherein, the input of described first current transformer receives power frequency current signal, and described power frequency current signal is sent to described single-chip microcomputer after described low-pass filter circuit, described first amplitude holding circuit and described first A/D converter process successively, if when described power frequency current signal is greater than predetermined threshold value, described single-chip microcomputer exports quick-break trip signal, described quick-break trip signal is passed to described circuit breaker through described amplifier and described auxiliary relay, controls described circuit breaker automatic shutdown circuit.
In this embodiment, the power frequency current signal of surge protector is first through the first current transformer, low-pass filter circuit, first amplitude holding circuit and an A/D change-over circuit process, better to obtain power frequency current signal more clearly, and during the power frequency current signal of single-chip microcomputer after receiving process, just itself and predetermined threshold value can be compared, like this, once power frequency current signal is greater than predetermined threshold value, single-chip microcomputer will export quick-break trip signal, circuit breaker is passed to through amplifier and auxiliary relay, carry out control loop circuit breaker automatic shutdown circuit, avoid the excessive initiation fire accident of power current.
The meeting initiation fire when the power frequency electric flow valuve of SPD is excessive, SPD occurs that deterioration is also a major reason simultaneously, deterioration be lightning current reach certain number of times after occur, in order to avoid the impact of deterioration, continue also to comprise see the protection controller of surge protector described in Fig. 1: the second current transformer, high-pass filtering circuit, second amplitude holding circuit, second A/D converter, wherein, the output of described second current transformer is connected with the input of described high-pass filtering circuit, the output of described high-pass filtering circuit is connected with the input of described second amplitude holding circuit, the output of described second amplitude holding circuit is connected with the input of described second A/D converter, the output of described second A/D converter is connected with the second input of described single-chip microcomputer,
Wherein, the input of described second current transformer receives high-frequency current signal, and described high-frequency current signal is sent to described single-chip microcomputer after described high-pass filtering circuit, described second amplitude holding circuit and the second A/D converter process successively, described single-chip microcomputer record receives number of times and the amplitude of described high-frequency current signal.
In this embodiment, high-frequency current signal is the lightning current invading base station, single-chip microcomputer receives by the second current transformer, high-pass filtering circuit, second amplitude holding circuit, high-frequency current signal after second A/D converter process, according to the number of times that the high-frequency current signal record received receives, amplitude, the time of generation can certainly be recorded, like this, when high-frequency current signal number of times reaches certain predetermined value or amplitude reaches certain predetermined value, there is the possibility of deterioration in SPD, staff can according to checking the data of record or being subject to alerting signal and repairing or replacing SPD, thus the fire avoiding deterioration to cause.
Wherein, described protection controller also comprises:
Be connected with the 3rd input of described single-chip microcomputer, for storing the memory of data.
This memory can store the data that single-chip microcomputer record obtains, and conveniently calls and the checking of staff.
Wherein, described protection controller also comprises:
Be connected with the four-input terminal of described single-chip microcomputer, for setting up the communication interface of the communication connection of power & environment supervision system in described single-chip microcomputer and base station.
The setting of communication interface, makes single-chip microcomputer can be connected with the power & environment supervision system in base station, uploads monitor message in real time.
Wherein, described communication interface is RS485 interface.
Wherein, described protection controller also comprises:
The independent clock be connected with the 5th input of described single-chip microcomputer.
In sum, the protection controller of the surge protector of the utility model embodiment, detects the power frequency electric flow valuve by SPD in real time, when power frequency electric flow valuve is greater than predetermined threshold value, can send quick-break trip signal, automatic shutdown circuit to circuit breaker; Record and store the amplitude number of times of lightning current invading base station, suffering the situation of lightning ingress to provide foundation for analyzing base station, avoiding the generation of deterioration; Can be connected with the power & environment supervision system in base station by communication interface, upload monitor message in real time, to monitor.
The above is preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite not departing from principle described in the utility model; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (6)
1. the protection controller of a surge protector, it is characterized in that, the protection controller of described surge protector comprises: the first current transformer, low-pass filter circuit, first amplitude holding circuit, first A/D converter, single-chip microcomputer, amplifier and auxiliary relay, wherein, the output of described first current transformer is connected with the input of described low-pass filter circuit, the output of described low-pass filter circuit is connected with the input of described first amplitude holding circuit, the output of described first amplitude holding circuit is connected with the input of described first A/D converter, the output of described first A/D converter is connected with the first input end of described single-chip microcomputer, the output of described single-chip microcomputer is connected with the input of described amplifier, the output of described amplifier is connected with the input of described auxiliary relay, the output of described auxiliary relay is connected with the input of the circuit breaker of surge protector,
Wherein, the input of described first current transformer receives power frequency current signal, and described power frequency current signal is sent to described single-chip microcomputer after described low-pass filter circuit, described first amplitude holding circuit and described first A/D converter process successively, if when described power frequency current signal is greater than predetermined threshold value, described single-chip microcomputer exports quick-break trip signal, described quick-break trip signal is passed to described circuit breaker through described amplifier and described auxiliary relay, controls described circuit breaker automatic shutdown circuit.
2. the protection controller of surge protector according to claim 1, it is characterized in that, the protection controller of described surge protector also comprises: the second current transformer, high-pass filtering circuit, second amplitude holding circuit, second A/D converter, wherein, the output of described second current transformer is connected with the input of described high-pass filtering circuit, the output of described high-pass filtering circuit is connected with the input of described second amplitude holding circuit, the output of described second amplitude holding circuit is connected with the input of described second A/D converter, the output of described second A/D converter is connected with the second input of described single-chip microcomputer,
Wherein, the input of described second current transformer receives high-frequency current signal, and described high-frequency current signal is sent to described single-chip microcomputer after described high-pass filtering circuit, described second amplitude holding circuit and the second A/D converter process successively, described single-chip microcomputer record receives number of times and the amplitude of described high-frequency current signal.
3. the protection controller of surge protector according to claim 1, is characterized in that, described protection controller also comprises:
Be connected with the 3rd input of described single-chip microcomputer, for storing the memory of data.
4. the protection controller of surge protector according to claim 1, is characterized in that, described protection controller also comprises:
Be connected with the four-input terminal of described single-chip microcomputer, for setting up the communication interface of the communication connection of power & environment supervision system in described single-chip microcomputer and base station.
5. the protection controller of surge protector according to claim 4, is characterized in that, described communication interface is RS485 interface.
6. the protection controller of surge protector according to claim 1, is characterized in that, described protection controller also comprises:
The independent clock be connected with the 5th input of described single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520465048.XU CN204858525U (en) | 2015-07-01 | 2015-07-01 | Surge protector's protection controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520465048.XU CN204858525U (en) | 2015-07-01 | 2015-07-01 | Surge protector's protection controller |
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| Publication Number | Publication Date |
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| CN204858525U true CN204858525U (en) | 2015-12-09 |
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| CN201520465048.XU Active CN204858525U (en) | 2015-07-01 | 2015-07-01 | Surge protector's protection controller |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105610144A (en) * | 2016-03-01 | 2016-05-25 | 国网山东省电力公司章丘市供电公司 | Surge protector |
| CN106444590A (en) * | 2016-12-07 | 2017-02-22 | 四川中光防雷科技股份有限公司 | Monitoring system of surge protector |
-
2015
- 2015-07-01 CN CN201520465048.XU patent/CN204858525U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105610144A (en) * | 2016-03-01 | 2016-05-25 | 国网山东省电力公司章丘市供电公司 | Surge protector |
| CN106444590A (en) * | 2016-12-07 | 2017-02-22 | 四川中光防雷科技股份有限公司 | Monitoring system of surge protector |
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| GR01 | Patent grant |