CN105896505A - Secondary overvoltage protector of current transformer - Google Patents
Secondary overvoltage protector of current transformer Download PDFInfo
- Publication number
- CN105896505A CN105896505A CN201610446558.1A CN201610446558A CN105896505A CN 105896505 A CN105896505 A CN 105896505A CN 201610446558 A CN201610446558 A CN 201610446558A CN 105896505 A CN105896505 A CN 105896505A
- Authority
- CN
- China
- Prior art keywords
- current transformer
- circuit
- protection device
- overvoltage
- logic control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/043—Protection of over-voltage protection device by short-circuiting
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/045—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage adapted to a particular application and not provided for elsewhere
Abstract
The invention discloses a secondary overvoltage protector of a current transformer, and relates to the technical field of overvoltage absorption of a power system. The secondary overvoltage protector comprises a logic control circuit, an overvoltage detection circuit and a silicon controlled rectifier protection device, wherein one end of the logic control circuit is connected with one end of silicon controlled rectifier protection device and one end of the current transformer, the other end of the logic control circuit is connected with one end of a circuit load, the other end of the silicon controlled rectifier protection device is connected with one end of the overvoltage detection circuit and the other end of current transformer, the other end of the overvoltage detection circuit is connected with the other end of the circuit load. The system overvoltage suppression device has the advantages of fast action speed, high overload capacity and small static leakage current, and the protection demands of various current transformers can be met.
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
Protector.
Background technology
Current transformer is moved in one-shot measurement and control in power system widely, and current transformer was running
If it occur that Secondary Winding open circuit or first side winding flow through abnormal current in journey, such as thunderbolt, resonance current, electric heating charging
Electric currents etc., all can produce the high pressure of thousands of volts volt the most up to ten thousand at secondary side, and this not only works the mischief to electrical secondary system insulation, also
The life of entail dangers to staff.
Summary of the invention
It is an object of the invention to provide a kind of Current Transformer Secondary overvoltage protection device, its quick action, overload energy
Power is strong, and static leakage current is little, can meet the protection demand of various current transformer.
In order to solve the problem in the presence of background technology, the present invention is by the following technical solutions: it includes logic control
Circuit processed, overvoltage detection circuit, thyristor protection device, described logic control circuit one terminates thyristor protection device one
End summation current transformer one end, other end connection circuit loads one end, and the thyristor protection device other end takes over voltage detecting circuit
Summation current transformer one end, one end other end, the overvoltage detection circuit other end connection circuit load other end.
The Current Transformer Secondary overvoltage protection device of the present invention is mainly used in the abnormal overvoltage of various CT secondary side to be protected
Protecting, protector is fixed in CT Secondary Winding two ends, and time properly functioning, leakage current is minimum, in high-impedance state, when CT secondary circuit
When open circuit or a winding occur extremely crossing stream, the voltage that Secondary Winding produces is significantly larger than normal operating voltage, now protects
The rapid action of device and short-circuit, panel shows the position of fault, and exports with or without source contact signal, after failture evacuation, by manually
SR, normal operation input work again after circuit reinstatement state.
The 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 the electrical schematic diagram of the present invention.
Detailed description of the invention
Seeing Fig. 1, a kind of Current Transformer Secondary overvoltage protection device, it includes logic control circuit, Zenith tracking
Circuit, thyristor protection device, described logic control circuit one terminates thyristor protection device one end summation current transformer one
End, other end connection circuit loads one end, and the thyristor protection device other end takes over voltage detecting circuit one end summation current transformer
One end other end, the overvoltage detection circuit other end connection circuit load other end.
The Current Transformer Secondary overvoltage protection device of the present invention is mainly used in the abnormal overvoltage of various CT secondary side to be protected
Protecting, protector is fixed in CT Secondary Winding two ends, and time properly functioning, leakage current is minimum, in high-impedance state, when CT secondary circuit
When open circuit or a winding occur extremely crossing stream, the voltage that Secondary Winding produces is significantly larger than normal operating voltage, now protects
The rapid action of device and short-circuit, panel shows the position of fault, and exports with or without source contact signal, after failture evacuation, by manually
SR, normal operation input work again after circuit reinstatement state.
The 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 characterised in that it includes logic control circuit, Zenith tracking electricity
Road, thyristor protection device, described logic control circuit one terminates summation current transformer one end, thyristor protection device one end,
Other end connection circuit loads one end, and the thyristor protection device other end takes over summation current transformer one end, voltage detecting circuit one end
The other end, the overvoltage detection circuit other end connection circuit load other end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610446558.1A CN105896505A (en) | 2016-06-21 | 2016-06-21 | Secondary overvoltage protector of current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610446558.1A CN105896505A (en) | 2016-06-21 | 2016-06-21 | Secondary overvoltage protector of current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105896505A true CN105896505A (en) | 2016-08-24 |
Family
ID=56731081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610446558.1A Withdrawn CN105896505A (en) | 2016-06-21 | 2016-06-21 | Secondary overvoltage protector of current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105896505A (en) |
-
2016
- 2016-06-21 CN CN201610446558.1A patent/CN105896505A/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20160824 |
|
| WW01 | Invention patent application withdrawn after publication |