CN2935175Y - Fault indicator of power supply line - Google Patents

Fault indicator of power supply line Download PDF

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Publication number
CN2935175Y
CN2935175Y CN 200620118026 CN200620118026U CN2935175Y CN 2935175 Y CN2935175 Y CN 2935175Y CN 200620118026 CN200620118026 CN 200620118026 CN 200620118026 U CN200620118026 U CN 200620118026U CN 2935175 Y CN2935175 Y CN 2935175Y
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Prior art keywords
circuit
microprocessor
connects
supply line
output
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Expired - Fee Related
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CN 200620118026
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Chinese (zh)
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董永清
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  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Locating Faults (AREA)

Abstract

A power line fault indicator includes a current transformer whose port connects with an inrush current signal circuit whose port connects with the input port of the following microprocessor, a power-on and fault-detecting circuit whose port connects with the other input port of the following microprocessor; a microprocessor; an indicator board driving circuit whose input connects the a output port of the microprocessor, output connects the indicator board; an indicator lamp driving circuit whose input connects the other output port of the microprocessor, output connects the indicator lamp. When the power line has a failure, the indicator board and the indicator lamp show the failure state at a same time, thus avoiding the problem that to discern the state of the indicator is hard when the utility model is dim, which exists in the present similar product. The utility is suitable for the overhead line, the electric power cable, the switch cabinet and the busbar under 110KV.

Description

Supply line's fault detector
Technical field
The utility model relates to a kind of line fault testing device, refers in particular to a kind of supply line fault detector.
Background technology
After supply line breaks down,, can only take the segmentation combined floodgate to search the backward way of fault section and blindness line walking usually if there is not online monitoring device.There have been some line fault testing devices to drop into use now, but also come with some shortcomings: existing line fault testing device is usually with coloured label indication fault, but be not easy to observe the state of label night, make not reach desirable effect in actual applications.
Summary of the invention
The purpose of this utility model is to provide a kind of supply line fault detector, when line failure, change bowl direction board and luminous indicating lamp indicating fault status simultaneously, avoided other similar products under the bad situation of light, do not see the defective of Chu's indicator status, it is applicable to 110KV and following overhead transmission line, power cable and switch cubicle busbar.
For this reason, the utility model is by the following technical solutions:
A kind of supply line fault detector, it comprises: current transformer, be used for obtaining the current signal of supply line, its output connects the mutation current signal circuit, powers on and failure detector circuit; The mutation current signal circuit is used for the mutation current of perception supply line, and its output connects an input end of microprocessor; Power on and failure detector circuit, the fault that is used for producing power on signal and detects supply line, its output connects another input end of following microprocessor; Microprocessor is used for mutation current signal and fault-signal are handled, and controls following direction board driving circuit and drive circuit of indicator; Direction board driving circuit, its input connect an output terminal of described microprocessor, and its output connects direction board; Drive circuit of indicator, its input connect another output terminal of described microprocessor, and its output connects pilot lamp.
In implementing measure of the present utility model, all right:
Input end at described microprocessor connects test circuit, and this test circuit is made up of the switch that is connected on the capacitance-resistance branch road between positive supply and the ground and be connected between this capacitance-resistance branch road series connection point and the ground, and this capacitance-resistance branch road series connection point connects the input end of described microprocessor.
The input end of described microprocessor can connect clock circuit.
The input end linkable program download circuit of described microprocessor.
Described mutation current signal circuit can be formed by capacitance-resistance series arm and transistor series, the output signal of the described current transformer of preceding termination of this capacitance-resistance series arm, and this transistorized output connects the input end of described microprocessor.
Described power on and failure detector circuit can be made up of the electric resistance partial pressure branch road of an end ground connection and the electric capacity in parallel with the following divider resistance of this dividing potential drop branch road, the output signal of the described current transformer of another termination of this dividing potential drop branch road, the dividing point of this dividing potential drop branch road connects the input end of described microprocessor.
Described direction board driving circuit can be by the forward and reverse control circuit of the bridge type that four transistors are formed, the magnetizing coil of described direction board is connected between the transistor series point of this electric bridge, and described each transistorized input connects an output terminal of described microprocessor respectively.
Described drive circuit of indicator can be made up of transistor, and described pilot lamp connects this transistorized output, an output terminal of the described microprocessor of this transistorized control termination.
The light activated switch of controlling pilot lamp of can connecting in the electric power loop of described pilot lamp or between the output terminal of described transistorized control end and described microprocessor.
Current transformer is gathered current signal in the supply line, if be short-circuited fault, but the mutation current signal circuit is the sudden change value of perception moment phase current just, and notice microprocessor, microprocessor is then by checking that the state that failure detector circuit presented has judged whether that line fault takes place, if have, then change bowl direction board and luminous indicating lamp while indicating fault status by driving circuit control.
The utility model has the advantages that:
Because when supply line broke down, commentaries on classics bowl direction board of the present utility model and luminous indicating lamp be indicating fault status simultaneously, thereby has avoided other similar products under the bad situation of light, does not see the defective of Chu's indicator status.
Owing to when after electric network fault is got rid of, sending electricity, can utilize power detection circuit to make a commentaries on classics bowl direction board in time return normal condition, make luminous indicating lamp stop flicker, therefore can reduce the power consumption of indicator.
The light activated switch owing to connected in the electric power loop of pilot lamp or in the control loop, its may command pilot lamp can only could be lighted when light is dark, therefore also can reduce the power consumption of indicator.
Because mutation current signal circuit and failure detector circuit be the signal of received current mutual inductor simultaneously, therefore can provide reliable fault detection signal to microprocessor, make mutation current when not only can detect fault accurately, and can eliminate the interference of shoving and causing.
Description of drawings
Be described further below in conjunction with accompanying drawing.
Fig. 1 is a composition frame chart of the present utility model;
Fig. 2 is circuit theory diagrams of the present utility model.
Embodiment
The utility model is a kind of line-failure indicator, sees also Fig. 1, and it comprises:
Current transformer 2 is used for obtaining the current signal of supply line, and its output connects mutation current signal circuit 3, powers on and failure detector circuit 4;
Mutation current signal circuit 3 is used for the mutation current of perception supply line, and its output connects an input end of microprocessor 1;
Power on and failure detector circuit 4, the fault that is used for producing power on signal and detects supply line, its output connects another input end of microprocessor 1;
Microprocessor 1 is used for mutation current signal and fault-signal are handled, and control direction board driving circuit 6 and drive circuit of indicator 7;
Direction board driving circuit 6, its input connect an output terminal of microprocessor 1, and its output connects direction board 10;
Drive circuit of indicator 7, its input connect another output terminal of microprocessor 1, and its output connects pilot lamp 11.
Can connect test circuit 5, clock circuit 9, program download circuit 8 at the input end of microprocessor in addition.
Said mutation current signal circuit 3, power on and failure detector circuit 4, test circuit 5, direction board driving circuit 6, drive circuit of indicator 7, program download circuit 8, clock circuit 9 are produced on the electronic circuit board and with plastic casing and encapsulate.
Current transformer 2 is gathered current signal in the supply line, if be short-circuited fault, but mutation current signal circuit 3 is the sudden change value of perception moment phase current just, and notice microprocessor 1,1 state that is presented by inspection failure detector circuit 4 of microprocessor has judged whether that line fault takes place, if have, then change bowl direction board 10 and light pilot lamp 11 indicating fault status simultaneously by driving circuit control.
See also circuit theory diagrams shown in Figure 2.
Microprocessor 1 is made of U1, and it selects the 16f88 of little core company for use, and it is the core component of this indicator, is a high-performance microprocessor that has analog to digital converter.Current transformer 2 is made up of coil L2 and resistance R 16, and its output becomes d. c. voltage signal after rectifier D2 rectification.Mutation current signal circuit 3 is in series by capacitance-resistance series arm C10-R7 and transistor Q1, and the front end of this capacitance-resistance series arm is the positive pole of capacitor C 10, connects the output signal of current transformer, and the output of this transistor Q1 connects the input end 6 of microprocessor U1.Power on and failure detector circuit 4 is made up of the electric resistance partial pressure branch road R4-R6 of an end ground connection and the capacitor C 5 in parallel with the following divider resistance R4 of this dividing potential drop branch road, the other end of this dividing potential drop branch road is the front end of R6, connect the output signal of current transformer, the dividing point of this dividing potential drop branch road connects the input end 18 of microprocessor U1.The forward and reverse control circuit of bridge type that direction board driving circuit 6 is made up of four transistor Q2, Q3, Q4, Q5, the magnetizing coil L1 of direction board 10 is connected between the transistor series point of this electric bridge, be that the input of transistor Q2-Q5 connects the output terminal 11,3,15,17 of microprocessor U1 respectively between the series connection point of the series connection point of transistor Q2, Q4 and transistor Q5, Q3.Drive circuit of indicator 7 is made up of transistor Q6, and pilot lamp 11 is formed the output terminal 2 of the control termination microprocessor U1 of this transistor Q6 by luminotron D3, the D4, the D5 that connect this transistor Q6 output.
Narrate the principle of work of this circuit below.
When the moment that supply line is short-circuited, phase current has a sudden change, if the mutation current value is greater than certain numerical value, and current value is zero in the time of setting, and show that then short trouble has taken place circuit, and circuit trips.Otherwise show the fault that is not short-circuited.
In supply line just often, the output voltage of current transformer is mild DC voltage substantially, because the obstruct of capacitor C 10, transistor Q1 ends, and does not have fault-signal report microprocessor.
When current transformer perceives when the macromutation electric current is arranged in the supply line, this high-frequency signal will pass capacitor C 10 and arrive triode Q1, make its collector level step-down, thereby send fault-signal.This high-frequency signal is also sent to failure detector circuit simultaneously.After microprocessor U1 receives this macromutation current signal, at first measure the voltage on the R4 in the failure detector circuit.If detect voltage arranged on the R4, think then that circuit has restored electricity or circuit on just taken place to shove, microprocessor does not deal with.If the voltage in the time of setting on the R4 reduces to zero, promptly the electric current of fault phase is zero, and then thinking has line fault to take place.So the direction board driving circuit 6 of microprocessor U1 by forming by Q2, Q3, Q4, Q5, magnetizing coil L1 is magnetized, drive commentaries on classics bowl direction board 10 and rotate indication fault, Q3 and Q4 conducting simultaneously is with normal magnetization coil L1, and Q2 and Q5 conducting simultaneously is the magnetic reversal coil then.The drive circuit of indicator 7 of microprocessor U1 by being made up of transistor Q6 makes pilot lamp 11 flickers simultaneously.
Because pilot lamp 11 display effect when light is dark is outstanding, and it is next not obvious at high light, therefore can be in its electric power loop or the output terminal 2 of the control end of transistor Q6 and microprocessor U1 between the light activated switch of connect, can only could be lighted than secretly the time in light with control pilot lamp 11.So also can reduce the power consumption of indicator.
Because mutation current signal circuit and failure detector circuit be the signal of received current mutual inductor simultaneously, therefore can provide reliable fault detection signal to microprocessor, make mutation current when not only can detect fault accurately, and can eliminate the interference of shoving and causing.
Introduce other functional unit in this circuit below:
U2 is a booster circuit, enough driving voltages is provided for electroluminescent lamp and direction board, and model can be selected TC1222 for use, and U2 only just starts working when receiving the control signal of microprocessor U1.
Test circuit 5 is made up of the switch S 1 that is connected on the capacitance-resistance branch road R3-C1 between positive supply and the ground and be connected between this capacitance-resistance branch road series connection point and the ground, this capacitance-resistance branch road series connection point connects the input end 4 of microprocessor U1, after switch S 1 is pressed, processor can be tested the each several part circuit, normal as circuit function, then pilot lamp D6 flicker is 3 times.
Program download circuit 8 is made up of connector J1, resistance R 1 and R2, capacitor C 4, and R1, R2, C4 are connected with the pin 9,12,8 of U1 respectively, and the program download circuit is used to upgrade and download the program of microprocessor.
Clock circuit 9 is made of U3, and its output connects the input end 16 of microprocessor U1, and clock circuit is used for providing timer clock to microprocessor U1, after timing finishes, changes a bowl direction board 10 and returns normal condition, and luminous indicating lamp 11 also stops flicker.
R4, R6 and C5 go up power detection circuit, the signal of its received current mutual inductor, can be used for judging whether indicator is in net state, promptly whether be installed on the power distribution network circuit, when only being in net state, microprocessor just begins to monitor fault-signal, otherwise microprocessor is in dormant state, therefore greatly reduce power consumption, prolonged the life-span of indicator.Go up simultaneously power detection circuit and also provide another kind of condition for indicator finishes the indicating fault state: generalized case, fault detector are made corresponding indication after detecting fault, through returning normal condition again behind the delay time of setting.When electric network fault is in time got rid of, and when delay time finishes to send electricity before, voltage is just arranged on its R4, therefore can utilize it to send the normal signal of supply line to microprocessor, microprocessor makes a commentaries on classics bowl direction board in time return normal condition, make luminous indicating lamp stop flicker then, to reduce the power consumption of indicator.

Claims (10)

1. supply line's fault detector is characterized in that it comprises:
Current transformer is used for obtaining the current signal of supply line, and its output connects following mutation current signal circuit, powers on and failure detector circuit;
The mutation current signal circuit is used for the mutation current of perception supply line, and its output connects an input end of following microprocessor;
Power on and failure detector circuit, the fault that is used for producing power on signal and detects supply line, its output connects another input end of following microprocessor;
Microprocessor is used for mutation current signal and fault-signal are handled, and controls following direction board driving circuit and drive circuit of indicator;
Direction board driving circuit, its input connect an output terminal of described microprocessor, and its output connects direction board;
Drive circuit of indicator, its input connect another output terminal of described microprocessor, and its output connects pilot lamp.
2. supply line as claimed in claim 1 fault detector is characterized in that:
The input end of described microprocessor connects test circuit.
3. supply line as claimed in claim 2 fault detector, it is characterized in that: described test circuit is made up of the switch that is connected on the capacitance-resistance branch road between positive supply and the ground and be connected between this capacitance-resistance branch road series connection point and the ground, and this capacitance-resistance branch road series connection point connects the input end of described microprocessor.
4. supply line as claimed in claim 1 fault detector is characterized in that:
The input end of described microprocessor connects clock circuit.
5. supply line as claimed in claim 1 fault detector is characterized in that:
The input end linker download circuit of described microprocessor.
6. as the described supply line of one of claim 1 to 5 fault detector, it is characterized in that:
Described mutation current signal circuit is formed by capacitance-resistance series arm and transistor series, the output signal of the described current transformer of preceding termination of this capacitance-resistance series arm, and this transistorized output connects the input end of described microprocessor.
7. as the described supply line of one of claim 1 to 5 fault detector, it is characterized in that: described power on and failure detector circuit is made up of the electric resistance partial pressure branch road of an end ground connection and the electric capacity in parallel with the following divider resistance of this dividing potential drop branch road, the output signal of the described current transformer of another termination of this dividing potential drop branch road, the dividing point of this dividing potential drop branch road connects the input end of described microprocessor.
8. as the described supply line of one of claim 1 to 5 fault detector, it is characterized in that:
The forward and reverse control circuit of bridge type that described direction board driving circuit is made up of four transistors, the magnetizing coil of described direction board is connected between the transistor series point of this electric bridge, and described each transistorized input connects an output terminal of described microprocessor respectively.
9. as the described supply line of one of claim 1 to 5 fault detector, it is characterized in that:
Described drive circuit of indicator is made up of transistor, and described pilot lamp connects this transistorized output, an output terminal of the described microprocessor of this transistorized control termination.
10. supply line as claimed in claim 9 fault detector is characterized in that: the light activated switch of the control pilot lamp of connecting in the electric power loop of described pilot lamp or between the output terminal of described transistorized control end and described microprocessor.
CN 200620118026 2006-06-02 2006-06-02 Fault indicator of power supply line Expired - Fee Related CN2935175Y (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101799510A (en) * 2009-02-11 2010-08-11 上海久隆电力科技有限公司 Automated device for WH power distribution fault diagnosis of trunk transformer
CN102147441A (en) * 2011-03-16 2011-08-10 苏正明 Monitoring circuit and method
CN102288854A (en) * 2011-05-10 2011-12-21 山东鲁亿通智能电气股份有限公司 Switchgear fault current collection device
CN102879214A (en) * 2011-07-12 2013-01-16 宁波Gqy视讯股份有限公司 Fault detecting and indicating apparatus
CN103424666A (en) * 2013-07-18 2013-12-04 广东电网公司电力科学研究院 Overhead line fault indicator with voltage detection function
CN108873772A (en) * 2018-06-08 2018-11-23 安徽捷迅光电技术有限公司 A kind of color selector breakdown judge display system

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101799510A (en) * 2009-02-11 2010-08-11 上海久隆电力科技有限公司 Automated device for WH power distribution fault diagnosis of trunk transformer
CN101799510B (en) * 2009-02-11 2013-01-23 上海电力通信有限公司 Automated device for WH power distribution fault diagnosis of trunk transformer
CN102147441A (en) * 2011-03-16 2011-08-10 苏正明 Monitoring circuit and method
CN102288854A (en) * 2011-05-10 2011-12-21 山东鲁亿通智能电气股份有限公司 Switchgear fault current collection device
CN102288854B (en) * 2011-05-10 2014-01-01 山东鲁亿通智能电气股份有限公司 Switchgear fault current collection device
CN102879214A (en) * 2011-07-12 2013-01-16 宁波Gqy视讯股份有限公司 Fault detecting and indicating apparatus
CN102879214B (en) * 2011-07-12 2015-04-08 宁波Gqy视讯股份有限公司 Fault detecting and indicating apparatus
CN103424666A (en) * 2013-07-18 2013-12-04 广东电网公司电力科学研究院 Overhead line fault indicator with voltage detection function
CN103424666B (en) * 2013-07-18 2016-05-11 广东电网公司电力科学研究院 A kind of fault indicator for overhead lines with voltage detecting function
CN108873772A (en) * 2018-06-08 2018-11-23 安徽捷迅光电技术有限公司 A kind of color selector breakdown judge display system
CN108873772B (en) * 2018-06-08 2021-05-04 安徽捷迅光电技术有限公司 Color sorter fault judgment display system

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Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
C41 Transfer of patent application or patent right or utility model
TR01 Transfer of patent right

Effective date of registration: 20090109

Address after: A-606, Beijing agricultural science building, 11 middle garden, Shuguang garden, Beijing, Haidian District, China: 100089

Patentee after: Beijing Feiju Electric Co., Ltd.

Address before: C308, 30 North wa Road, Beijing, Haidian District, 100089

Patentee before: Dong Yongqing

ASS Succession or assignment of patent right

Owner name: BEIJING FEIJU ELECTRIC APPLICANCE CO., LTD.

Free format text: FORMER OWNER: DONG YONGQING

Effective date: 20090109

C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20070815

Termination date: 20140602