CN104868459A - Secondary overvoltage protector for current transformer - Google Patents
Secondary overvoltage protector for current transformer Download PDFInfo
- Publication number
- CN104868459A CN104868459A CN201510289015.9A CN201510289015A CN104868459A CN 104868459 A CN104868459 A CN 104868459A CN 201510289015 A CN201510289015 A CN 201510289015A CN 104868459 A CN104868459 A CN 104868459A
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- Prior art keywords
- terminal
- current transformer
- circuit
- overvoltage
- logic control
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Abstract
The invention provides a secondary overvoltage protector for a current transformer and relates to the technical field of overvoltage-absorbing in an electric system. The secondary overvoltage protector for the current transformer comprises a logic control circuit, an overvoltage detecting circuit and a silicon controlled protection apparatus. A terminal of the logic control circuit is connected with a terminal of the silicon controlled protection apparatus and a terminal of the current transformer, and the other terminal of the logic control circuit is connected with a terminal of circuit loads; and the other terminal of the silicon controlled protection apparatus is connected with a terminal of the overvoltage detecting circuit and the other terminal of the current transformer, and the other terminal of the overvoltage detecting circuit is connected with the other terminal of the circuit loads. The overvoltage inhibition apparatus for a system has the advantages of high motion speed, high overload capability and low static state leakage current, and meets protection requirements for various current transformers.
Description
Technical field
The present invention relates to Hyper-Voltage of Power Systems absorption techniques field, particularly relate to a kind of Current Transformer Secondary overvoltage protection device.
Background technology
Current transformer is moved in one-shot measurement and control widely in electric power system, if there is secondary winding open circuit in current transformer or first side winding flows through abnormal current in running, as thunderbolt, resonance current, electrothermal charging current etc., capital produces the high pressure of thousands of volt volt even up to ten thousand at secondary side, this not only works the mischief to electrical secondary system insulation, goes back the life of entail dangers to staff.
Summary of the invention
The object of this invention is to provide a kind of Current Transformer Secondary overvoltage protection device, its quick action, overload capacity is strong, and static leakage current is little, can meet the protection demand of various current transformer.
In order to solve problem existing in background technology; the present invention is by the following technical solutions: it comprises logic control circuit, overvoltage detection circuit, thyristor protection device; described summation current transformer one end, logic control circuit one termination thyristor protection device one end; other end connection circuit load one end; the thyristor protection device other end takes over summation current transformer one end, voltage detecting circuit one end other end, the overvoltage detection circuit other end connection circuit load other end.
Current Transformer Secondary overvoltage protection device of the present invention is mainly used in the abnormal overvoltage protection of various CT secondary side, protector is fixed in CT secondary winding two ends, during normal operation, leakage current is minimum, in high-impedance state, when there is abnormal overcurrent in CT secondary circuit open circuit or a winding, the voltage that secondary winding produces is far away higher than normal operating voltage, the now rapid action of protector and short circuit, panel shows the position of fault, and export with or without source contact signal, after failture evacuation, by manual reset button, again normal operation input work after circuit reinstatement state.
System overvoltage restraining device of the present invention, its quick action, overload capacity is strong, and static leakage currents is little, can meet the protection demand of various current transformer.
Accompanying drawing explanation
Fig. 1 is electrical schematic diagram of the present invention.
Embodiment
See Fig. 1; a kind of Current Transformer Secondary overvoltage protection device; it comprises logic control circuit, overvoltage detection circuit, thyristor protection device; described summation current transformer one end, logic control circuit one termination thyristor protection device one end; other end connection circuit load one end; the thyristor protection device other end takes over summation current transformer one end, voltage detecting circuit one end other end, the overvoltage detection circuit other end connection circuit load other end.
Current Transformer Secondary overvoltage protection device of the present invention is mainly used in the abnormal overvoltage protection of various CT secondary side, protector is fixed in CT secondary winding two ends, during normal operation, leakage current is minimum, in high-impedance state, when there is abnormal overcurrent in CT secondary circuit open circuit or a winding, the voltage that secondary winding produces is far away higher than normal operating voltage, the now rapid action of protector and short circuit, panel shows the position of fault, and export with or without source contact signal, after failture evacuation, by manual reset button, again normal operation input work after circuit reinstatement state.
System overvoltage restraining device of the present invention, its quick action, overload capacity is strong, and static leakage currents is little, can meet the protection demand of various current transformer.
Claims (1)
1. Current Transformer Secondary overvoltage protection device; it is characterized in that; it comprises logic control circuit, overvoltage detection circuit, thyristor protection device; described summation current transformer one end, logic control circuit one termination thyristor protection device one end; other end connection circuit load one end; the thyristor protection device other end takes over summation current transformer one end, voltage detecting circuit one end other end, the overvoltage detection circuit other end connection circuit load other end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510289015.9A CN104868459A (en) | 2015-06-01 | 2015-06-01 | Secondary overvoltage protector for current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510289015.9A CN104868459A (en) | 2015-06-01 | 2015-06-01 | Secondary overvoltage protector for current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104868459A true CN104868459A (en) | 2015-08-26 |
Family
ID=53914093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510289015.9A Withdrawn CN104868459A (en) | 2015-06-01 | 2015-06-01 | Secondary overvoltage protector for current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104868459A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104836201A (en) * | 2015-06-01 | 2015-08-12 | 合肥扬帆通信元器件有限公司 | Secondary overvoltage protection device of current transformer |
| CN104901296A (en) * | 2015-06-12 | 2015-09-09 | 合肥市徽腾网络科技有限公司 | Secondary overvoltage protection device for current transformer |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5317469A (en) * | 1992-03-19 | 1994-05-31 | Lu Chao Cheng | Arrangement of an over-voltage protection circuit |
| CN202797942U (en) * | 2012-08-30 | 2013-03-13 | 宁波德沃电气有限公司 | Secondary over-voltage protector of current transformer |
| CN203278215U (en) * | 2013-01-22 | 2013-11-06 | 合肥隆科电力设备有限责任公司 | Secondary overvoltage protector for current transformer |
-
2015
- 2015-06-01 CN CN201510289015.9A patent/CN104868459A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5317469A (en) * | 1992-03-19 | 1994-05-31 | Lu Chao Cheng | Arrangement of an over-voltage protection circuit |
| CN202797942U (en) * | 2012-08-30 | 2013-03-13 | 宁波德沃电气有限公司 | Secondary over-voltage protector of current transformer |
| CN203278215U (en) * | 2013-01-22 | 2013-11-06 | 合肥隆科电力设备有限责任公司 | Secondary overvoltage protector for current transformer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104836201A (en) * | 2015-06-01 | 2015-08-12 | 合肥扬帆通信元器件有限公司 | Secondary overvoltage protection device of current transformer |
| CN104901296A (en) * | 2015-06-12 | 2015-09-09 | 合肥市徽腾网络科技有限公司 | Secondary overvoltage protection device for current transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20150826 |
|
| WW01 | Invention patent application withdrawn after publication |