CN204706873U - A kind of overvoltage protective device for current transformer secondary side with detection control apparatus - Google Patents
A kind of overvoltage protective device for current transformer secondary side with detection control apparatus Download PDFInfo
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- CN204706873U CN204706873U CN201520353889.1U CN201520353889U CN204706873U CN 204706873 U CN204706873 U CN 204706873U CN 201520353889 U CN201520353889 U CN 201520353889U CN 204706873 U CN204706873 U CN 204706873U
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Abstract
The utility model discloses a kind of overvoltage protective device for current transformer secondary side with detection control apparatus, comprise the wiring board of current sensor, primary side and secondary side, the output of described secondary side is connected with signal gathering unit in turn, key control unit, protected location, voltage conversion unit, protection execution unit and indication reset parts, the collection terminal of described signal gathering unit is connected with the secondary side of current transformer, its output is connected with key control unit, key control unit is connected with protected location, the beneficial effects of the utility model are: structure is simple, easy to use, integrate controllable silicon and relay, combine the advantage of the two, protected location action is divided into three steps, overcome the deficiency of original single type protective device, both ensure that the promptness of protection act, again reduce the caloric value of device, effectively can avoid self burnout failure that protective device occurs due to controllable silicon closed heating for a long time.
Description
Technical field
The utility model relates to instrument transformer over-voltage protection technology field, particularly relates to a kind of overvoltage protective device for current transformer secondary side with detection control apparatus.
Background technology
In electric power system, current transformer (CT) is widely used in the Measurement & Control of primary current.Normal mutual when working sensor secondary side is near short circuit state, and output voltage is very low.If secondary winding open circuit in running, or a winding flows through abnormal current (as lightning current, resonance overcurrent, capacitance charging current, inductance starting current etc.), all can produce the overvoltage of thousands of volt volt even up to ten thousand at secondary side.This not only works the mischief to electrical secondary system insulation, instrument transformer also can be made too drastic and scaling loss, the even life security of crisis staff.Therefore, current transformer is generally also provided with secondary overvoltage protective device.
Utility model content
For solving the problems of the technologies described above; the utility model provides a kind of overvoltage protective device for current transformer secondary side with detection control apparatus; structure is simple; easy to use; integrate controllable silicon and relay; combine the advantage of the two; protected location action is divided into three steps; overcome the deficiency of original single type protective device; both ensure that the promptness of protection act; again reduce the caloric value of device, effectively can avoid self burnout failure that protective device occurs due to controllable silicon closed heating for a long time.
For solving the problems of the technologies described above, the embodiment of the present application provides a kind of overvoltage protective device for current transformer secondary side with detection control apparatus, comprise the wiring board of current sensor, primary side and secondary side, the output of described secondary side is connected with signal gathering unit in turn, key control unit, protected location, voltage conversion unit, protection execution unit and indication reset parts, the collection terminal of described signal gathering unit is connected with the secondary side of current transformer, its output is connected with key control unit, key control unit is connected with protected location.
As the preferred embodiment of this programme, described protected location comprises controllable silicon and relay, and the two is in parallel relationship.
As the preferred embodiment of this programme, described signal gathering unit is the first varistor be connected in series mutually and the second varistor that are connected across secondary side two ends.
As the preferred embodiment of this programme; described voltage conversion unit is made up of rectifier bridge and the filtering capacitor being connected in parallel in its output, and the input of described rectifier is in parallel with affiliated second varistor, output is connected with the input electricity of described protection execution unit.
As the preferred embodiment of this programme, the two ends that input is serially connected with the push-button switch of described indication reset parts, the first normally opened contact of its output is connected across secondary side of described protection execution unit.
As the preferred embodiment of this programme, the output of described core control part is connected with warning circuit, described warning circuit is parallel with warning lamp and buzzer.
The one or more technical schemes provided in the embodiment of the present application, at least have following technique effect or advantage:
Structure is simple; easy to use; integrate controllable silicon and relay; combine the advantage of the two; protected location action is divided into three steps, overcomes the deficiency of original single type protective device, both ensure that the promptness of protection act; again reduce the caloric value of device, effectively can avoid self burnout failure that protective device occurs due to controllable silicon closed heating for a long time.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structure chart of the embodiment of the present application one.
In figure, 1, circuit board, 2, primary side; 3, secondary side, 4, signal gathering unit, 5, key control unit; 6, protected location, 7, voltage conversion unit, 8, protection execution unit; 9, indication reset parts, 10, controllable silicon, 11, relay; 12, the first varistor, the 13, second varistor, 14, warning circuit; 15, warning lamp, 16, buzzer.
Embodiment
In order to better understand technique scheme, below in conjunction with Figure of description and concrete execution mode, technique scheme is described in detail.
Embodiment one:
In embodiment one, as Fig. 1 provides a kind of overvoltage protective device for current transformer secondary side with detection control apparatus, comprise the wiring board 1 of current sensor, primary side 2 and secondary side 3, the output of described secondary side 3 is connected with signal gathering unit 4 in turn, key control unit 5, protected location 6, voltage conversion unit 7, protection execution unit 8 and indication reset parts 9, the collection terminal of described signal gathering unit 4 is connected with the secondary side 3 of current transformer, its output is connected with key control unit 5, key control unit 5 is connected with protected location 6.
Wherein, in the present embodiment, described protected location 6 comprises controllable silicon 10 and relay 11, and the two is in parallel relationship.
Wherein, in the present embodiment, described signal gathering unit 4 is for being connected across first varistor 12 and second varistor 13 be connected in series mutually at secondary side 3 two ends.
Wherein, in the present embodiment; described voltage conversion unit 7 is made up of rectifier bridge and the filtering capacitor being connected in parallel in its output, and the input of described rectifier is in parallel with affiliated second varistor, output is connected with the input electricity of described protection execution unit.
Wherein, in the present embodiment, the two ends that the input of described protection execution unit 8 is serially connected with the push-button switch of described indication reset parts, the first normally opened contact of its output is connected across secondary side.
Wherein, in the present embodiment, the output of described core control part 5 is connected with warning circuit 14, described warning circuit 14 is parallel with warning lamp 15 and buzzer 16.
Technical scheme in above-mentioned the embodiment of the present application, at least has following technique effect or advantage:
Structure is simple; easy to use; integrate controllable silicon and relay; combine the advantage of the two; protected location action is divided into three steps, overcomes the deficiency of original single type protective device, both ensure that the promptness of protection act; again reduce the caloric value of device, effectively can avoid self burnout failure that protective device occurs due to controllable silicon closed heating for a long time.
Although described preferred embodiment of the present utility model, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the utility model scope.
Obviously, those skilled in the art can carry out various change and modification to the utility model and not depart from spirit and scope of the present utility model.Like this, if these amendments of the present utility model and modification belong within the scope of the utility model claim and equivalent technologies thereof, then the utility model is also intended to comprise these change and modification.
Claims (6)
1. the overvoltage protective device for current transformer secondary side with detection control apparatus; it is characterized in that: comprise the wiring board of current sensor, primary side and secondary side; the output of described secondary side is connected with signal gathering unit, key control unit, protected location, voltage conversion unit, protection execution unit and indication reset parts in turn; the collection terminal of described signal gathering unit is connected with the secondary side of current transformer; its output is connected with key control unit, and key control unit is connected with protected location.
2. a kind of overvoltage protective device for current transformer secondary side with detection control apparatus according to claim 1, it is characterized in that, described protected location comprises controllable silicon and relay, and the two is in parallel relationship.
3. a kind of overvoltage protective device for current transformer secondary side with detection control apparatus according to claim 1, is characterized in that, described signal gathering unit is the first varistor be connected in series mutually and the second varistor that are connected across secondary side two ends.
4. a kind of overvoltage protective device for current transformer secondary side with detection control apparatus according to claim 1; it is characterized in that; described voltage conversion unit is made up of rectifier bridge and the filtering capacitor being connected in parallel in its output, and the input of described rectifier is in parallel with affiliated second varistor, output is connected with the input electricity of described protection execution unit.
5. a kind of overvoltage protective device for current transformer secondary side with detection control apparatus according to claim 1; it is characterized in that, the two ends that input is serially connected with the push-button switch of described indication reset parts, the first normally opened contact of its output is connected across secondary side of described protection execution unit.
6. a kind of overvoltage protective device for current transformer secondary side with detection control apparatus according to claim 1; it is characterized in that; the output of described core control part is connected with warning circuit, described warning circuit is parallel with warning lamp and buzzer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520353889.1U CN204706873U (en) | 2015-05-28 | 2015-05-28 | A kind of overvoltage protective device for current transformer secondary side with detection control apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520353889.1U CN204706873U (en) | 2015-05-28 | 2015-05-28 | A kind of overvoltage protective device for current transformer secondary side with detection control apparatus |
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| CN204706873U true CN204706873U (en) | 2015-10-14 |
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| CN201520353889.1U Active CN204706873U (en) | 2015-05-28 | 2015-05-28 | A kind of overvoltage protective device for current transformer secondary side with detection control apparatus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106932629A (en) * | 2017-03-08 | 2017-07-07 | 许继集团有限公司 | Voltage check device, impedance isolation circuit and control method |
| CN109980601A (en) * | 2017-12-28 | 2019-07-05 | 国网江苏省电力公司常州供电公司 | Electromagnetic current transducer secondary circuit protective device |
-
2015
- 2015-05-28 CN CN201520353889.1U patent/CN204706873U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106932629A (en) * | 2017-03-08 | 2017-07-07 | 许继集团有限公司 | Voltage check device, impedance isolation circuit and control method |
| CN109980601A (en) * | 2017-12-28 | 2019-07-05 | 国网江苏省电力公司常州供电公司 | Electromagnetic current transducer secondary circuit protective device |
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| 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: 20160408 Address after: 401320 Chongqing city Banan District Yudong Town textile Village No. 94 Patentee after: Chongqing Shancheng Electric Appliance Factory Co., Ltd. Address before: Shengzhou City, Zhejiang province 312467 city of Shaoxing Changle Zhen Bian Keng Patentee before: Xing Kejun |