CN202994957U - Line fault indication device - Google Patents
Line fault indication device Download PDFInfo
- Publication number
- CN202994957U CN202994957U CN 201220701019 CN201220701019U CN202994957U CN 202994957 U CN202994957 U CN 202994957U CN 201220701019 CN201220701019 CN 201220701019 CN 201220701019 U CN201220701019 U CN 201220701019U CN 202994957 U CN202994957 U CN 202994957U
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Abstract
The utility model discloses a line fault indication device which comprises a housing, a current transformer, a wire clamping mechanism and a circuit board. The current transformer comprises a magnetic core and a wire loop. The circuit board is placed in the housing and is equipped with a power obtaining current control circuit. The input end of the power obtaining current control circuit is electrically connected with the output end of the coil. The circuit board is further equipped with a voltage reduction output circuit and a charging circuit. The input end of the voltage reduction output circuit is electrically connected with the output end of the power obtaining current control circuit. The output end of the voltage reduction output circuit is electrically connected with the input end of the charging circuit. Through the above structure of the line fault indication device, currents generated by the coil are transmitted to the power obtaining current control circuit for current sampling and are also utilized to charge the charging circuit after voltage reduction by the voltage reduction output circuit. Therefore, the above power obtaining method helps to thoroughly solve problems about the short service life of a battery for power supply, poor high and low temperature characteristics, a high failure rate and the big size of a product.
Description
Technical field
The utility model relates to the device of the fault of surveying electric distribution network overhead wire, cable line, particularly relates to a kind of line fault indicating device.
Background technology
The line fault indicating device is a kind of a kind of signal meter (SM) for surveying electric distribution network overhead wire, cable line and whether breaking down, its principle of work is: when circuit breaks down. in circuit, electric parameter can produce sudden change, the variation of magnetic field and electric field occurs around circuit, line fault indicating device on circuit gathers electric current by current sensing means, pull for the control section circuit and detect and analyze judgement, and then output alarm signal drives indicating section work, and then reaches the purpose of indication fault circuit.
At present, the power supply of most of line fault indicating device all uses battery, and powered battery has many shortcomings, as: battery life is short, property at high and low temperature is poor, crash rate is high, volume is large etc.
Summary of the invention
For above-mentioned prior art present situation, the purpose of this utility model is, a kind of line fault indicating device is provided, and solves the defective that powered battery exists.
in order to solve the problems of the technologies described above, a kind of line fault indicating device provided by the utility model, comprise casing, current transformer, card line mechanism and circuit board, described current transformer comprises magnetic core and coil, described circuit board is placed in described casing, be provided with the power taking current control circuit on this circuit board, the input end of this power taking current control circuit is electrically connected to the output terminal of described coil, also be provided with reduced output voltage circuit and charging circuit on described circuit board, the input end of this reduced output voltage circuit is electrically connected to the output terminal of described power taking current control circuit, the output terminal of this reduced output voltage circuit is electrically connected to the input end of this charging circuit.
In embodiment, described reduced output voltage circuit comprises the charging reduction voltage circuit therein.
Therein in embodiment, described charging circuit comprises that voltage detecting circuit, capacitor charging circuit and charging arrange circuit, the power supply of this voltage detecting circuit is electrically connected to the output terminal of described charging reduction voltage circuit, the output terminal of this voltage detecting circuit is electrically connected to the first input end of described capacitor charging circuit, the power supply that this charging arranges circuit is electrically connected to the output terminal of described charging reduction voltage circuit, and the output terminal that this charging arranges circuit is electrically connected to the second input end of described capacitor charging circuit.
In embodiment, described reduced output voltage circuit also comprises system's reduction voltage circuit therein.
In embodiment, also be provided with the voltage sample modulate circuit on described circuit board therein, the input end of this voltage sample modulate circuit is electrically connected to the output terminal of described magnetic core.
Therein in embodiment, described voltage sample Circuit tuning comprises voltage sampling circuit and filter and amplification modulate circuit, the input end of this voltage sampling circuit is electrically connected to the output terminal of described magnetic core, and the output terminal of this voltage sampling circuit is electrically connected to the input end of this filter and amplification modulate circuit.
In embodiment, described power taking current control circuit comprises rectification circuit, current sampling circuit and overvoltage crowbar therein.
In embodiment, described magnetic core is the open type structure therein, and it comprises first magnetic core and second magnetic core, and described coil is arranged on this second magnetic core, and this coil is positioned at described casing.
therein in embodiment, described current transformer also comprises the upper magnetic core set casing for fixing described first magnetic core, the lower magnetic core set casing that is used for fixing described second magnetic core, rotating shaft and the first torsion spring, this time magnetic core set casing is fixed on the top of described casing, upward the magnetic core set casing is positioned at the top of this time magnetic core set casing, and upward an end of magnetic core set casing is connected rotationally by the end of rotating shaft with this time magnetic core set casing, described rotating shaft is fixed on the top of described casing by support, one end of described the first torsion spring is arranged in described rotating shaft, the other end is pressed on described upper magnetic core set casing.
In embodiment, described card line mechanism comprises semicircle bayonet socket and the second torsion spring that is arranged at described casing top therein, and an end of this second torsion spring is arranged in described rotating shaft, and the other end is positioned at the top of described bayonet socket.
Compared with prior art, line fault indicating device provided by the utility model has following beneficial effect:
1, line fault indicating device provided by the utility model, the current delivery that the coil of current transformer produces is carried out current sample to the power taking current control circuit, simultaneously this electric current charges to charging circuit after by the step-down of reduced output voltage circuit, this way to take power has thoroughly solved the problem that life-span is short, property at high and low temperature is poor, crash rate is high, small product size is large that powered battery occurs.
2, because having complete magnetic core, current transformer forms magnetic conductive loop, own loss is down to minimum, its conversion efficiency is high and be not subjected to the external interference antijamming capability strong, even line load is hour (5A) also power taking and can keep the fault detector powered operation, and electric current, voltage sample are unaffected, and sampling precision is also very high.
3, line fault indicating device provided by the utility model also can arrange the voltage sample Circuit tuning, the measurement of voltage is not affected by the external environment substantially yet, measuring accuracy can satisfy fault detector fully and use, distribution network line can save voltage transformer (VT), reduce the engineering construction input cost, also reduced the installation and maintenance cost.
In a word, utilize line fault indicating device provided by the utility model can more thoroughly solve low and medium voltage distribution network overhead transmission line and cable line fault fingering device Power supply problem, and to electric current, voltage sample problem, for line security operation and fault judgement, location eliminating are offered help.
Description of drawings
Fig. 1 is the main TV structure schematic diagram of the line fault indicating device in one of them embodiment of the utility model;
Fig. 2 is the perspective view of the current transformer in Fig. 1;
Fig. 3 is the schematic block circuit diagram of the line fault indicating device in Fig. 1.
Fig. 4 is the schematic diagram of the power taking current control circuit of the line fault indicating device in Fig. 1;
Fig. 5 is the schematic diagram of the reduced output voltage circuit of the line fault indicating device in Fig. 1;
Fig. 6 is the charging circuit schematic diagram of the line fault indicating device in Fig. 1;
Fig. 7 is the schematic diagram of the voltage sample modulate circuit of the line fault indicating device in Fig. 1.
Description of reference numerals:
101, upper magnetic core set casing, 102, first magnetic core, 103, cable, 104, second magnetic core, 105, lower magnetic core set casing, 106, coil, 107, the second torsion spring, 108, the first torsion spring, 109, rotating shaft, 110, support, 111, casing, 112, the first wire, 113, circuit board, the 114-bayonet socket, 115-the second wire, 200, the power taking current control circuit, 201, rectification circuit, 202, current sampling circuit, 203, overvoltage crowbar, 300, the reduced output voltage circuit, 301, the charging reduction voltage circuit, 302, system's reduction voltage circuit, 400, charging circuit, 401, voltage detecting circuit, 402, capacitor charging circuit, 403, charging arranges circuit, 500, the voltage sample modulate circuit, 501, voltage sampling circuit, 502, the filter and amplification modulate circuit.
Embodiment
Also in conjunction with the embodiments the utility model is elaborated below with reference to accompanying drawing.Need to prove, in the situation that do not conflict, below feature in each embodiment and embodiment can mutually make up.
As shown in Figure 1, 2, line fault indicating device in one of them embodiment of the utility model, comprise casing 111, current transformer, card line mechanism and circuit board 113, wherein, current transformer comprises magnetic core and the coil 106 that is wound on this magnetic core, preferably, described magnetic core is the open type structure, it comprises first magnetic core 102 and second magnetic core 104, and described coil 106 is arranged on this second magnetic core 104, and this coil 106 is positioned at described casing 111.
further, described current transformer also comprises the upper magnetic core set casing 101 for fixing described first magnetic core 102, the lower magnetic core set casing 105 that is used for fixing described second magnetic core 104, rotating shaft 109 and the first torsion spring 108, this time magnetic core set casing 105 is fixed on the top of described casing 111, after lower magnetic core set casing 105 is fixing with second magnetic core 104, some glue forms an integral body, then wrap the coil 106 of suitable no-load voltage ratio on lower magnetic core set casing 105, form the secondary output current path, deliver to through the first wire 112 again and carry out the signal processing on circuit board 113, draw second wire 115 on second magnetic core 104 simultaneously, this second wire 115 is delivered to and is used for voltage measurement on circuit board 113.upper magnetic core set casing 101 is arranged at the top of lower magnetic core set casing 105, and upward an end of magnetic core set casing 101 is connected by the end of rotating shaft 109 with this time magnetic core set casing 105, described rotating shaft 109 is fixed on the top of described casing 111 by support 110, first magnetic core 102 is contained in magnetic core set casing 101, and first magnetic core 102 can be finely tuned in shell because deciding at upper magnetic core, going up like this when magnetic core set casing 101 is pressed down by the first torsion spring 108 to have surplus to carry out a little activity, make first magnetic core 102 and second magnetic core 104 fit tightly to guarantee to contact good formation magnetic conductive loop.One end of described the first torsion spring 108 is arranged in described rotating shaft 109, and the other end is resisted against on described upper magnetic core set casing 101, so that first magnetic core 102 and second magnetic core 104 close contacts form good magnetic conductive loop.
Preferably, card line mechanism in the present embodiment comprises semicircle bayonet socket 114 and the second torsion spring 107 that is arranged at described casing 111 tops, one end of this second torsion spring 107 is arranged in described rotating shaft 109, the other end is positioned at the top of described bayonet socket 114, by the second torsion spring 107 and bayonet socket 114, cable 103 is clamped.
Described circuit board 113 is placed in described casing 111, be provided with power taking current control circuit 200, reduced output voltage circuit 300 and charging circuit 400 on this circuit board 113, the input end of this power taking current control circuit 200 is electrically connected to the output terminal of described coil 106, the input end of reduced output voltage circuit 300 is electrically connected to the output terminal of described power taking current control circuit 200, and the output terminal of this reduced output voltage circuit 300 is electrically connected to the input end of this charging circuit 400.Preferably, also be provided with voltage sample modulate circuit 500 on described circuit board 113, the input end of this voltage sample modulate circuit 500 is electrically connected to the output terminal of described magnetic core.
Figure 3 shows that the schematic block circuit diagram of the line fault indicating device in the present embodiment, when having electric current to flow through on a bus cable 103, produce exciting current on first magnetic core 102 and the formed closed loop of second magnetic core 104, produce corresponding secondary current output on coil 106, be connected with circuit board 113 by the first wire 112, by carrying out current sample after power taking current control circuit 200 conditionings on circuit board 113, this electric current also charges to system power supply by reduced output voltage circuit 300 and charging circuit 400 timesharing simultaneously, when line current hour turn-offs current-taking function, firing current measurement function.Simultaneously, produce induced voltage on second magnetic core 104, transfer to circuit board 113 by the second wire 115, after utilizing voltage sample modulate circuit 500 processing on circuit, obtain required sampled voltage signal.
As shown in Figure 4, preferably, described power taking current control circuit 200 comprises rectification circuit 201, current sampling circuit 202 and overvoltage crowbar 203.Current sampling circuit 202 is realized cable 103 size of current are gathered.Overvoltage crowbar 203 is main to be risen and prevents the power taking overtension and cause the circuit elements device failure, and output voltage can be adjusted automatically.In addition, overvoltage crowbar 203 detects when power taking voltage surpasses the magnitude of voltage of setting and starts work, makes rectification circuit 201 stable output voltages.
As shown in Figure 5, preferably, described reduced output voltage circuit 300 comprises charging reduction voltage circuit 301.Further, described reduced output voltage circuit 300 also comprises system's reduction voltage circuit 302.Charging reduction voltage circuit 301 and system's reduction voltage circuit 302 are respectively used to provide suitable Voltage-output to charging circuit 400 and system power supply.
as shown in Figure 6, preferably, described charging circuit 400 comprises voltage detecting circuit 401, capacitor charging circuit 402 and charging arrange circuit 403, the power supply of this voltage detecting circuit 401 is electrically connected to the output terminal of described charging reduction voltage circuit 301, the output terminal of this voltage detecting circuit 401 is electrically connected to the first input end (being the 4th pin of U2) of described capacitor charging circuit 402, the power supply that this charging arranges circuit 403 is electrically connected to the output terminal of described charging reduction voltage circuit 301, this charging arranges the output terminal of circuit 403 and is electrically connected to the second input end of described capacitor charging circuit 402 (being the 7th pin of U2).Whether main of voltage detecting circuit 401 detects charging voltage and meets the demands, and just opens charging when just voltage satisfies charging requirement, and charging arranges circuit 403 can the size of adjusting capacitor charging electric current automatic according to the size of power taking electric current.
As shown in Figure 7, preferably, described voltage sample Circuit tuning comprises voltage sampling circuit 501 and filter and amplification modulate circuit 502, the input end of this voltage sampling circuit 501 is electrically connected to the output terminal of described second magnetic core 104, and the output terminal of this voltage sampling circuit 501 is electrically connected to the input end of this filter and amplification modulate circuit 502.After processing by the voltage sampling circuit 501 on circuit and filter and amplification modulate circuit 502, obtain required sampled voltage signal.
This shows, the line fault indicating device in the utility model embodiment has the following advantages:
1, the line fault indicating device that provides of the utility model embodiment, the current delivery that the coil of current transformer produces is carried out current sample to the power taking current control circuit, simultaneously this electric current charges and to system power supply to charging circuit after by the step-down of reduced output voltage circuit, this way to take power, thoroughly solved the problem that life-span is short, property at high and low temperature is poor, crash rate is high, small product size is large that powered battery occurs, and can realize line current, voltage are sampled.
2, because having complete magnetic core, current transformer forms magnetic conductive loop, own loss is down to minimum, its conversion efficiency is high and be not subjected to the external interference antijamming capability strong, even line load is hour (5A) also power taking and can keep the fault detector powered operation, and electric current, voltage sample are unaffected, and sampling precision is also very high.
3, the line fault indicating device that provides of the utility model embodiment also can arrange the voltage sample Circuit tuning, the measurement of voltage is not affected by the external environment substantially yet, measuring accuracy can satisfy fault detector fully and use, distribution network line can save voltage transformer (VT), reduce the engineering construction input cost, also reduced the installation and maintenance cost.
In a word, utilize the line fault indicating device that the utility model embodiment provides more thoroughly to solve low and medium voltage distribution network overhead transmission line and cable line fault fingering device Power supply problem, and to electric current, voltage sample problem, for line security operation and fault judgement, location eliminating are offered help.
The above embodiment has only expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model the scope of the claims.Should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (10)
1. line fault indicating device, comprise casing, current transformer, card line mechanism and circuit board, described current transformer comprises magnetic core and coil, described circuit board is placed in described casing, be provided with the power taking current control circuit on this circuit board, the input end of this power taking current control circuit is electrically connected to the output terminal of described coil, it is characterized in that, also be provided with reduced output voltage circuit and charging circuit on described circuit board, the input end of this reduced output voltage circuit is electrically connected to the output terminal of described power taking current control circuit, the output terminal of this reduced output voltage circuit is electrically connected to the input end of this charging circuit.
2. line fault indicating device according to claim 1, is characterized in that, described reduced output voltage circuit comprises the charging reduction voltage circuit.
3. line fault indicating device according to claim 2, it is characterized in that, described charging circuit comprises that voltage detecting circuit, capacitor charging circuit and charging arrange circuit, the power supply of this voltage detecting circuit is electrically connected to the output terminal of described charging reduction voltage circuit, the output terminal of this voltage detecting circuit is electrically connected to the first input end of described capacitor charging circuit, the power supply that this charging arranges circuit is electrically connected to the output terminal of described charging reduction voltage circuit, and the output terminal that this charging arranges circuit is electrically connected to the second input end of described capacitor charging circuit.
4. line fault indicating device according to claim 2, is characterized in that, described reduced output voltage circuit also comprises system's reduction voltage circuit.
5. line fault indicating device according to claim 1, is characterized in that, also is provided with the voltage sample modulate circuit on described circuit board, and the input end of this voltage sample modulate circuit is electrically connected to the output terminal of described magnetic core.
6. line fault indicating device according to claim 5, it is characterized in that, described voltage sample Circuit tuning comprises voltage sampling circuit and filter and amplification modulate circuit, the input end of this voltage sampling circuit is electrically connected to the output terminal of described magnetic core, and the output terminal of this voltage sampling circuit is electrically connected to the input end of this filter and amplification modulate circuit.
7. the described line fault indicating device of any one according to claim 1 to 6, is characterized in that, described power taking current control circuit comprises rectification circuit, current sampling circuit and overvoltage crowbar.
8. line fault indicating device according to claim 1, is characterized in that, described magnetic core is the open type structure, and it comprises first magnetic core and second magnetic core, and described coil is arranged on this second magnetic core, and this coil is positioned at described casing.
9. line fault indicating device according to claim 8, it is characterized in that, described current transformer also comprises the upper magnetic core set casing for fixing described first magnetic core, the lower magnetic core set casing that is used for fixing described second magnetic core, rotating shaft and the first torsion spring, this time magnetic core set casing is fixed on the top of described casing, upward the magnetic core set casing is positioned at the top of this time magnetic core set casing, and upward an end of magnetic core set casing is connected rotationally by the end of rotating shaft with this time magnetic core set casing, described rotating shaft is fixed on the top of described casing by support, one end of described the first torsion spring is arranged in described rotating shaft, the other end is pressed on described upper magnetic core set casing.
10. line fault indicating device according to claim 9, it is characterized in that, described card line mechanism comprises semicircle bayonet socket and the second torsion spring that is arranged at described casing top, and an end of this second torsion spring is arranged in described rotating shaft, and the other end is positioned at the top of described bayonet socket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220701019 CN202994957U (en) | 2012-12-17 | 2012-12-17 | Line fault indication device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220701019 CN202994957U (en) | 2012-12-17 | 2012-12-17 | Line fault indication device |
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| Publication Number | Publication Date |
|---|---|
| CN202994957U true CN202994957U (en) | 2013-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220701019 Expired - Lifetime CN202994957U (en) | 2012-12-17 | 2012-12-17 | Line fault indication device |
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| CN (1) | CN202994957U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105044395A (en) * | 2015-07-09 | 2015-11-11 | 国网河南省电力公司濮阳供电公司 | Double-split wire on-line monitoring device installation fixture and installation method |
| CN105116296A (en) * | 2015-10-12 | 2015-12-02 | 国家电网公司 | Special fault indicator for high-voltage power transmission network cable line |
| CN106501684A (en) * | 2017-01-13 | 2017-03-15 | 北京中电科锐科技有限公司 | A kind of line-failure indicator |
| CN106653516A (en) * | 2016-12-09 | 2017-05-10 | 国网山东省电力公司烟台供电公司 | Indicator for drop fuse |
| CN108710062A (en) * | 2018-06-27 | 2018-10-26 | 中科（深圳）能源物联网有限公司 | A kind of wireless monitoring device of cable |
| CN109167346A (en) * | 2018-09-21 | 2019-01-08 | 黎耿 | A kind of direct current suspension power supply system and its insulation resistance monitoring method |
| CN110470900A (en) * | 2019-09-12 | 2019-11-19 | 和远智能科技股份有限公司 | A kind of passive electricity consumption awareness apparatus and system |
-
2012
- 2012-12-17 CN CN 201220701019 patent/CN202994957U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105044395A (en) * | 2015-07-09 | 2015-11-11 | 国网河南省电力公司濮阳供电公司 | Double-split wire on-line monitoring device installation fixture and installation method |
| CN105044395B (en) * | 2015-07-09 | 2017-10-10 | 国网河南省电力公司濮阳供电公司 | Double bundle conductor on-Line Monitor Device installs fixture and installation method |
| CN105116296A (en) * | 2015-10-12 | 2015-12-02 | 国家电网公司 | Special fault indicator for high-voltage power transmission network cable line |
| CN106653516A (en) * | 2016-12-09 | 2017-05-10 | 国网山东省电力公司烟台供电公司 | Indicator for drop fuse |
| CN106501684A (en) * | 2017-01-13 | 2017-03-15 | 北京中电科锐科技有限公司 | A kind of line-failure indicator |
| CN108710062A (en) * | 2018-06-27 | 2018-10-26 | 中科（深圳）能源物联网有限公司 | A kind of wireless monitoring device of cable |
| CN109167346A (en) * | 2018-09-21 | 2019-01-08 | 黎耿 | A kind of direct current suspension power supply system and its insulation resistance monitoring method |
| CN110470900A (en) * | 2019-09-12 | 2019-11-19 | 和远智能科技股份有限公司 | A kind of passive electricity consumption awareness apparatus and system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130612 |
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| CX01 | Expiry of patent term |