CN201142567Y - Secondary side open circuit protecting equipment of current mutual inductor - Google Patents
Secondary side open circuit protecting equipment of current mutual inductor Download PDFInfo
- Publication number
- CN201142567Y CN201142567Y CNU2007201907810U CN200720190781U CN201142567Y CN 201142567 Y CN201142567 Y CN 201142567Y CN U2007201907810 U CNU2007201907810 U CN U2007201907810U CN 200720190781 U CN200720190781 U CN 200720190781U CN 201142567 Y CN201142567 Y CN 201142567Y
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- current transformer
- secondary side
- circuit
- short
- open circuit
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Abstract
The utility model relates to a secondary side open circuit protective device for a current transformer. The protective device comprises a short-circuit device, which is arranged at two ends of the secondary winding of the current transformer in an open circuit mode or connection mode. When the current transformer is under normal operation, the short-circuit device is connected on the secondary side of the current transformer together with secondary side loads in parallel in the open circuit mode; and when the secondary side of the current transformer goes wrong or needs to replace instruments and meters for secondary protection or measurement, the short-circuit device is connected on the secondary side of the current transformer together with secondary side loads in parallel in the connection mode. The secondary side open circuit protective device provided by the utility model has the advantages of small volume, simple circuits, etc.; and effectively avoids heavy accidents due to open circuit of the secondary side when the secondary side of the current transformer goes wrong or needs to replace instruments and meters for secondary protection or measurement.
Description
Technical field
The utility model relates to a kind of overvoltage protection, particularly a kind of Current Transformer Secondary side open-circuit protecting device.
Background technology
Current transformer is made of winding and secondary winding, and the electric current that winding detects flows to secondary winding in the mode of electromagnetic induction, and secondary winding is then exported the current signal of induction.If secondary winding is opened a way, the electric current of a winding will all be used for excitatory, make the iron core of current transformer seriously saturated.The magnetic flux of alternation will induce very high voltage on secondary winding, its peak value can reach several kilovolts even volt up to ten thousand, so high voltage acts on the loop that secondary winding reaches with secondary winding is connected, with serious threat personal safety and device security, even, the insulation of current mutual inductor coil burns out because of overheated, so current transformer is in operation and forbids to open a way.
In addition; when needing to change protective device that connects secondary winding or the instrument and meter that instrumentation is used if be in operation; need short circuit secondary winding in current transformer two ends; perhaps have a power failure and handle; the short circuit secondary winding in current transformer that is in operation two ends are abnormally dangerous, therefore, no matter are the short circuit secondary winding that is in operation; still have a power failure, all can bring inconvenience.Therefore, the secondary side open-circuit protecting device must be installed in current transformer.But, in the technical scheme that adopts both at home and abroad, comprise and utilize thermocouple, electronic circuit and relay etc. at present, all there are shortcomings such as volume is big, circuit is complicated, cost an arm and a leg respectively.
The utility model content
The purpose of this utility model provides a kind of Current Transformer Secondary side open-circuit protecting device, has characteristics such as simple in structure, easy for installation.
For achieving the above object, the utility model provides a kind of Current Transformer Secondary side open-circuit protecting device, comprises a short-circuit device, and described short-circuit device is arranged on the two ends of the secondary winding of current transformer to cut-off state or connection status.
Described short-circuit device is a relay, this relay often open or normally-closed contact is connected to the secondary winding two ends of described current transformer, make the two ends of the secondary winding of current transformer can short circuit or disconnection by the work of relay.
Described short-circuit device is the short-circuit component that is connected with actuation means, and this short-circuit component is arranged on the secondary winding two ends of described current transformer, can this short-circuit component is connected with the secondary winding in current transformer two ends or disconnect by actuation means.
The utility model provides a kind of Current Transformer Secondary side open-circuit protecting device simple in structure, easy for installation; be arranged on the two ends of the secondary winding of current transformer by short-circuit device to cut-off state or connection status; avoided breaking down or when need changing the instrument and meter that second protection or instrumentation use secondary side open circuit and produce the problem of great production accident effectively because of the Current Transformer Secondary side.
Description of drawings
Fig. 1 is the structural representation of the utility model Current Transformer Secondary side open-circuit protecting device first embodiment;
Fig. 2 is the work schematic diagram of the utility model Current Transformer Secondary side open-circuit protecting device first embodiment;
Fig. 3 is the structural representation of the utility model Current Transformer Secondary side open-circuit protecting device second embodiment;
Fig. 4 is the work schematic diagram of the utility model Current Transformer Secondary side open-circuit protecting device second embodiment.
Description of reference numerals:
1-current transformer 2-secondary side load 3-short-circuit device
4-relay contact 5-actuation means 6-short-circuit component
A winding 8-of 7-secondary winding
Embodiment
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Fig. 1 is the structural representation of the utility model Current Transformer Secondary side open-circuit protecting device first embodiment.As shown in Figure 1, Current Transformer Secondary side open-circuit protecting device comprises a short-circuit device 3, and this short-circuit device 3 is arranged on the two ends of the secondary winding 8 of current transformer 1 to cut-off state or connection status.
In the present embodiment, this short-circuit device 3 is a relay, often opening or normally-closed contact of this relay, promptly relay contact 4 is connected to secondary winding 8 two ends of current transformer 1, makes the two ends of the secondary winding 8 of current transformer 1 can short circuit or disconnection by the work of relay.
As shown in Figure 1, current transformer 1 is various general current transformers, when winding 7 of current transformer 1 and secondary winding 8 operate as normal, short-circuit device 3 is connected in parallel on current transformer 1 secondary side with secondary side load 2, relay contact 4 is for cut-offfing state at this moment, and secondary side load 2 is removed bypass.Fig. 2 is the work schematic diagram of the utility model Current Transformer Secondary side open-circuit protecting device first embodiment; when current transformer 1 secondary side breaks down or need to change the instrument and meter that second protection or instrumentation use; make relay contact 4 be closure state; at this moment, secondary side load 2 is by short circuit.
After fault has been got rid of or has been changed instrument and meter that second protection or instrumentation use and finished, as shown in Figure 1, make relay 4 recover off-states, at this moment, former secondary side load 2 is removed bypass, and secondary side load 2 recovers operate as normal.
Fig. 3 is the structural representation of the utility model Current Transformer Secondary side open-circuit protecting device second embodiment, compare first embodiment, in the present embodiment, short-circuit device 3 is the short-circuit component 6 that is connected with actuation means 5, this short-circuit component 6 is arranged on secondary winding 8 two ends of described current transformer 1, can this short-circuit component 6 is connected with current transformer 1 secondary winding 8 two ends or disconnect by handling actuation means 5; Current transformer 1 is various general current transformers, when winding 7 of current transformer 1 and secondary winding 8 operate as normal, short-circuit device 3 is connected in parallel on current transformer 1 secondary side with secondary side load 2, and short-circuit component 6 is for cut-offfing state at this moment, and secondary side load 2 is removed bypass.Fig. 4 is the work schematic diagram of the utility model Current Transformer Secondary side open-circuit protecting device second embodiment; when current transformer 1 secondary side breaks down or need to change the instrument and meter that second protection or instrumentation use; will be by handling actuation means 5; make short-circuit component 6 be closure state; at this moment, secondary side load 2 is by short circuit.
After fault has been got rid of or has been changed instrument and meter that second protection or instrumentation use and finished, as shown in Figure 3, by handling actuation means 5; make short-circuit component 6 recover off-state; at this moment, former secondary side loop is removed bypass, and secondary side load 2 recovers operate as normal.
The utility model provides a kind of Current Transformer Secondary side open-circuit protecting device simple in structure, easy for installation; this protective device by a short-circuit device to cut-off state or connection status and the secondary side load is connected in parallel on the Current Transformer Secondary side; avoided breaking down or when need changing the instrument and meter that second protection or instrumentation use secondary side open circuit and produce the problem of great production accident effectively because of the Current Transformer Secondary side.
It should be noted that at last: above embodiment only in order to the explanation the technical solution of the utility model, is not intended to limit; Although the utility model is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of each embodiment technical scheme of the utility model.
Claims (3)
1, a kind of Current Transformer Secondary side open-circuit protecting device is characterized in that: comprise a short-circuit device, described short-circuit device is arranged on the two ends of the secondary winding of current transformer to cut-off state or connection status.
2, Current Transformer Secondary side open-circuit protecting device according to claim 1; it is characterized in that: described short-circuit device is a relay; this relay often open or normally-closed contact is connected to the secondary winding two ends of described current transformer, make the two ends of the secondary winding of current transformer can short circuit or disconnection by the work of relay.
3, Current Transformer Secondary side open-circuit protecting device according to claim 1; it is characterized in that: the short-circuit component of described short-circuit device for being connected with actuation means; this short-circuit component is arranged on the secondary winding two ends of described current transformer, can this short-circuit component is connected with the secondary winding in current transformer two ends or disconnect by actuation means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201907810U CN201142567Y (en) | 2007-12-13 | 2007-12-13 | Secondary side open circuit protecting equipment of current mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201907810U CN201142567Y (en) | 2007-12-13 | 2007-12-13 | Secondary side open circuit protecting equipment of current mutual inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201142567Y true CN201142567Y (en) | 2008-10-29 |
Family
ID=40070276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201907810U Expired - Lifetime CN201142567Y (en) | 2007-12-13 | 2007-12-13 | Secondary side open circuit protecting equipment of current mutual inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201142567Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102798838A (en) * | 2012-08-29 | 2012-11-28 | 重庆市电力公司电力科学研究院 | Pluggable safety junction box for site calibration of electric energy meter |
| CN103399253A (en) * | 2013-08-20 | 2013-11-20 | 国家电网公司 | Device for detecting circuit opening of secondary circuit of current transformer |
| CN103812098A (en) * | 2012-11-12 | 2014-05-21 | 苏州工业园区新宏博通讯科技有限公司 | Current transformer secondary open circuit protection device |
| CN103956714A (en) * | 2014-04-24 | 2014-07-30 | 合肥沃华电气技术有限公司 | High-sensitivity multifunctional CT open circuit protection device |
| CN104898006A (en) * | 2014-03-04 | 2015-09-09 | 国家电网公司 | Current transformer secondary side open circuit anticipation device |
| CN104953548A (en) * | 2015-07-23 | 2015-09-30 | 合肥扬帆通信元器件有限公司 | Intelligent selective current transformer winding secondary side open circuit protector circuit |
| CN105510679A (en) * | 2016-01-21 | 2016-04-20 | 江苏省电力公司电力科学研究院 | High-reliability and high-precision current measuring method and device |
| CN107315157A (en) * | 2017-08-04 | 2017-11-03 | 国网江苏省电力公司无锡供电公司 | A kind of current transformer circuit supervision fail alarm detector and current transformer device |
-
2007
- 2007-12-13 CN CNU2007201907810U patent/CN201142567Y/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102798838A (en) * | 2012-08-29 | 2012-11-28 | 重庆市电力公司电力科学研究院 | Pluggable safety junction box for site calibration of electric energy meter |
| CN103812098A (en) * | 2012-11-12 | 2014-05-21 | 苏州工业园区新宏博通讯科技有限公司 | Current transformer secondary open circuit protection device |
| CN103812098B (en) * | 2012-11-12 | 2016-08-03 | 苏州新宏博智能科技股份有限公司 | Second open circuit protector of current mutual inductor |
| CN103399253A (en) * | 2013-08-20 | 2013-11-20 | 国家电网公司 | Device for detecting circuit opening of secondary circuit of current transformer |
| CN103399253B (en) * | 2013-08-20 | 2015-10-21 | 国家电网公司 | A kind of open circuit of secondary loop of current transformer pick-up unit |
| CN104898006A (en) * | 2014-03-04 | 2015-09-09 | 国家电网公司 | Current transformer secondary side open circuit anticipation device |
| CN103956714A (en) * | 2014-04-24 | 2014-07-30 | 合肥沃华电气技术有限公司 | High-sensitivity multifunctional CT open circuit protection device |
| CN103956714B (en) * | 2014-04-24 | 2016-09-07 | 合肥沃华电气技术有限公司 | A kind of high sensitivity multi-functional CT open-circuit protecting device |
| CN104953548A (en) * | 2015-07-23 | 2015-09-30 | 合肥扬帆通信元器件有限公司 | Intelligent selective current transformer winding secondary side open circuit protector circuit |
| CN105510679A (en) * | 2016-01-21 | 2016-04-20 | 江苏省电力公司电力科学研究院 | High-reliability and high-precision current measuring method and device |
| CN107315157A (en) * | 2017-08-04 | 2017-11-03 | 国网江苏省电力公司无锡供电公司 | A kind of current transformer circuit supervision fail alarm detector and current transformer device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: Baoju street 510730 Guangdong economic and Technological Development Zone No. 8 layer 2-5 Patentee after: Guangzhou Fokstone Electric Co., Ltd. Address before: Yuehai Group No. 555 building, 510050 Dongfeng Road Guangdong city of Guangzhou province 1604-1605 Patentee before: Guangzhou Fokstone Electric Co., Ltd. |
|
| C56 | Change in the name or address of the patentee |
Owner name: GUANGZHOU FOKSTONE ELECTRIC CO., LTD. Free format text: FORMER NAME: GUANGZHOU HUOSITONG ELECTRIC CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: Baoju economic and Technological Development Zone of Guangdong Province, Guangzhou City, 510730 street, No. 8 2-5 Patentee after: Guangzhou Fokstone Electric Co., Ltd. Address before: Baoju street 510730 Guangdong economic and Technological Development Zone No. 8 layer 2-5 Patentee before: Guangzhou Fokstone Electric Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20081029 |
|
| CX01 | Expiry of patent term |