CN204068189U - Possesses the secondary side overvoltage protection device that dead electricity keeps function - Google Patents
Possesses the secondary side overvoltage protection device that dead electricity keeps function Download PDFInfo
- Publication number
- CN204068189U CN204068189U CN201420409886.0U CN201420409886U CN204068189U CN 204068189 U CN204068189 U CN 204068189U CN 201420409886 U CN201420409886 U CN 201420409886U CN 204068189 U CN204068189 U CN 204068189U
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- Prior art keywords
- circuit
- electrically connected
- utility
- trigger control
- dead electricity
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- Expired - Fee Related
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a kind of secondary side overvoltage protection device possessing dead electricity and keep function, comprise power circuit, sample circuit, trigger control circuit and status display circuit; Described power circuit and described sample circuit, described trigger control circuit, described status display circuit are electrically connected.Charging indication comprises block diode and resistance, rechargeable battery and dual-colored LED indicator light, and described block diode is in series with a resistor gives the charging of described rechargeable battery; The two ends described dual-colored LED indicator light in parallel of described battery.The utility model has the following advantages compared to existing technology: the utility model adopts externally fed and keeps function with dead electricity; when outside power down; be switched to internal electric energy memory module without time delay to power; maintenance work; whether display divides line fault in protector protection portion; convenient for maintaining, quick solution fault.
Description
Technical field
The utility model relates to voltage protector, in particular a kind of secondary side overvoltage protection device possessing dead electricity and keep function.
Background technology
Known current transformer (hereinafter referred to as CT), in electric power system, is widely used in one-shot measurement and control.In normal work, instrument transformer secondary side is near short circuit state, and output voltage is very low.When actual motion, if one time winding flows through abnormal current (as thunder-strike current, resonance current, capacitance charging current, inductance starting current etc.), also the overvoltage of thousands of volt volt even up to ten thousand all can be produced at secondary side, this not only works the mischief to secondary side insulation, can be also that instrument transformer is too drastic and burn, even jeopardize the life security of staff.
CT secondary side overvoltage protection device existing product is all adopt site environment external power supply to power, and when external environment condition power down, protector just can not work, and maintainer is difficult to failure judgement point, brings very large inconvenience to service work.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of secondary side overvoltage protection device possessing dead electricity and keep function.
The utility model is achieved through the following technical solutions: a kind of secondary side overvoltage protection device possessing dead electricity and keep function, comprises power circuit, sample circuit, trigger control circuit and status display circuit, described power circuit and described sample circuit, described trigger control circuit, described status display circuit is electrically connected, the information output of described sample circuit and the signal input part of described trigger control circuit are electrically connected, the signal output part of described trigger control circuit and the signal output part of described status display circuit are electrically connected, it is characterized in that: described power circuit comprises ac filter circuit, exchange overvoltage crowbar, ac-dc converter circuit, DC filtering circuit, DC over-voltage protection circuit, charged electrical indicating circuit, described ac filter circuit is electrically connected with the described overvoltage crowbar that exchanges, described DC filtering circuit is through described DC filtering, DC over-voltage protection circuit and described charging indication are electrically connected,
Described charging indication is for comprising block diode (D3) and resistance (R2), battery and dual-colored LED indicator light, and described block diode (D3) is connected with resistance (R2) and to be charged to described rechargeable battery; The two ends described dual-colored LED indicator light in parallel of described rechargeable battery.
The utility model has the following advantages compared to existing technology: a kind of secondary side overvoltage protection device possessing dead electricity maintenance function of the present utility model not only adopts externally fed but also keeps function with dead electricity; namely when outside power down; the utility model is switched to internal electric energy memory module without time delay and powers; maintenance work; whether display divides line fault in protector protection portion; this brings great convenience to maintainer, and fault is resolved fast.
Accompanying drawing explanation
Fig. 1 is the power circuit diagram possessing dead electricity and keep the secondary side overvoltage protection device of function of the present utility model.
Fig. 2 is the sample circuit figure possessing dead electricity and keep the secondary side overvoltage protection device of function of the present utility model.
Fig. 3 is the trigger control circuit figure possessing dead electricity and keep the secondary side overvoltage protection device of function of the present utility model.
Embodiment
Below embodiment of the present utility model is elaborated; the present embodiment is implemented under premised on technical solutions of the utility model; give detailed execution mode and concrete operating process, but protection range of the present utility model is not limited to following embodiment.
See Fig. 1-Fig. 3, be a kind of secondary side overvoltage protection device possessing dead electricity and keep function of the present utility model, comprise power circuit, sample circuit, trigger control circuit and status display circuit; Power circuit and sample circuit, circuits for triggering, status display circuit are electrically connected.The information output of sample circuit and the signal input part of trigger control circuit are electrically connected.The signal output part of trigger control circuit and the signal output part of status display circuit are electrically connected, power circuit comprises ac filter circuit, exchanges overvoltage crowbar, ac-dc converter circuit, DC filtering circuit, DC over-voltage protection circuit, charged electrical indicating circuit, ac filter circuit with exchange overvoltage crowbar and be electrically connected, DC filtering circuit is electrically connected through DC filtering circuit, DC over-voltage protection circuit and charging indication;
Charging indication is for comprising block diode D3 and resistance R2, rechargeable battery and dual-colored LED indicator light, and block diode D3 connects with resistance R2 and to charge to rechargeable battery; The two ends dual-colored LED indicator light in parallel of battery.
In work, diode D3 plays reverse barrier effect, keeps the voltage max of rechargeable battery, until electric discharge.
A kind of secondary side overvoltage protection device possessing dead electricity maintenance function of the present utility model not only adopts externally fed but also keeps function with dead electricity; namely when outside power down; the utility model is switched to internal electric energy memory module without time delay and powers; maintenance work; whether display divides line fault in protector protection portion; this brings great convenience to maintainer, and fault is resolved fast.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection range of the present utility model.
Claims (1)
1. possess the secondary side overvoltage protection device that dead electricity keeps function, comprise power circuit, sample circuit, trigger control circuit and status display circuit, described power circuit and described sample circuit, described trigger control circuit, described status display circuit is electrically connected, the information output of described sample circuit and the signal input part of described trigger control circuit are electrically connected, the signal output part of described trigger control circuit and the signal output part of described status display circuit are electrically connected, it is characterized in that: described power circuit comprises ac filter circuit, exchange overvoltage crowbar, ac-dc converter circuit, DC filtering circuit, DC over-voltage protection circuit, charging indication, described ac filter circuit is electrically connected with the described overvoltage crowbar that exchanges, described DC filtering circuit is through described DC filtering, DC over-voltage protection circuit and described charging indication are electrically connected,
Described charging indication is for comprising block diode (D3) and resistance (R2), rechargeable battery and dual-colored LED indicator light, and described block diode (D3) is connected with resistance (R2) and to be charged to described rechargeable battery; The two ends described dual-colored LED indicator light in parallel of described battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420409886.0U CN204068189U (en) | 2014-07-23 | 2014-07-23 | Possesses the secondary side overvoltage protection device that dead electricity keeps function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420409886.0U CN204068189U (en) | 2014-07-23 | 2014-07-23 | Possesses the secondary side overvoltage protection device that dead electricity keeps function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204068189U true CN204068189U (en) | 2014-12-31 |
Family
ID=52209637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420409886.0U Expired - Fee Related CN204068189U (en) | 2014-07-23 | 2014-07-23 | Possesses the secondary side overvoltage protection device that dead electricity keeps function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204068189U (en) |
-
2014
- 2014-07-23 CN CN201420409886.0U patent/CN204068189U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141231 Termination date: 20200723 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |