CN205377261U - Secondary over -voltage protector of current transformer - Google Patents
Secondary over -voltage protector of current transformer Download PDFInfo
- Publication number
- CN205377261U CN205377261U CN201620109232.5U CN201620109232U CN205377261U CN 205377261 U CN205377261 U CN 205377261U CN 201620109232 U CN201620109232 U CN 201620109232U CN 205377261 U CN205377261 U CN 205377261U
- Authority
- CN
- China
- Prior art keywords
- current transformer
- unit
- secondary winding
- signal receiving
- receiving unit
- 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.)
- Expired - Fee Related
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses a secondary over -voltage protector of current transformer, including microprocessor, current transformer, secondary winding link, signal acquisition element, signal receiving unit, display element, the alarm unit, the power supply unit, microprocessor links to each other with current transformer, signal acquisition element, signal receiving unit, display element, and current transformer links to each other with the secondary winding link, and secondary winding connects and links to each other with the alarm unit, signal acquisition element links to each other with signal receiving unit. The utility model discloses the overvoltage that produces in the time of can being used for restricting the secondary specially and opening a way to there is secondary over -voltage protector of current transformer manual or the automatic re -setting function after having the output of action contact, automatic luminescent display, automatic blocking differential protection, action, and long service life, the speed of action mistake, overload capacity is strong, and static leakage current is little.
Description
Technical field
This utility model belongs to Hyper-Voltage of Power Systems absorption techniques field, particularly relates to a kind of Current Transformer Secondary overvoltage protection device.
Background technology
Known current transformer (hereinafter referred to as CT), in power system, is widely used in one-shot measurement and control.Current transformer principle is based on electromagnetic induction principle.Current transformer is made up of the iron core closed and winding.The current transformer of Secondary Winding Y-connection has three phase connection terminal A, B and C and a common terminal N.In normal operation, 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 (such 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, may also be transformer too drastic and burn, even jeopardize the life security of staff.
Summary of the invention
For solving the problems referred to above; the utility model discloses a kind of Current Transformer Secondary overvoltage protection device; the overvoltage produced when can be specifically used to restriction second open circuit; and there is action connection point output, automatic luminous shows, automatic blocking differential protection, have the Current Transformer Secondary overvoltage protection device of reset function manually or automatically after action; and long service life; speed of action mistake, overload capacity is strong, and static leakage currents is little.
In order to reach object above; this utility model provides following technical scheme: a kind of Current Transformer Secondary overvoltage protection device; including microprocessor, current transformer, Secondary Winding link, signal gathering unit, signal receiving unit, display unit; alarm unit; electric power supply unit; microprocessor is connected with current transformer, signal gathering unit, signal receiving unit, display unit; current transformer is connected with Secondary Winding link, and Secondary Winding connection is connected with alarm unit, signal gathering unit is connected with signal receiving unit.
As a kind of preferred version of the present utility model, described current transformer is arranged on the three-phase of Secondary Winding link, and Secondary Winding link is connected with signal gathering unit.
As a kind of preferred version of the present utility model, described Secondary Winding link is set to Y-connection.
As a kind of preferred version of the present utility model, described electric power supply unit includes AC220V power supply.
Compared with prior art; the beneficial effect that this utility model possesses: this utility model is by the effect between Secondary Winding and current transformer; can to the abnormal clear and definite perception of over-current phenomenon avoidance occurs; thus short circuit measure is made in action rapidly, and exported by signal, and can accurately show malfunctioning node; and can Quick-return state; and be suitable for different occasion, and protection reset can unrestricted choice, it is possible to meet the various demands of user.
Accompanying drawing explanation
Fig. 1 is the structural representation of Current Transformer Secondary overvoltage protection device.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, it is further elucidated with this utility model, it should be understood that following detailed description of the invention is merely to illustrate this utility model rather than limits scope of the present utility model.It should be noted that the word "front", "rear" of middle use is described below, direction that "left", "right", "up" and "down" refer in accompanying drawing, word " interior " and " outward " refer respectively to the direction towards or away from particular elements geometric center.
A kind of Current Transformer Secondary overvoltage protection device as shown in Figure 1, including microprocessor, current transformer, Secondary Winding link, signal gathering unit, signal receiving unit, display unit, alarm unit, electric power supply unit, microprocessor and current transformer, signal gathering unit, signal receiving unit, display unit is connected, current transformer is connected with Secondary Winding link, Secondary Winding connects and is connected with alarm unit, signal gathering unit is connected with signal receiving unit, current transformer is arranged on the three-phase of Secondary Winding link, Secondary Winding link is connected with signal gathering unit, Secondary Winding link is set to Y-connection, electric power supply unit includes AC220V power supply.
Combined type current transformer secondary overvoltage protector can be connected to Secondary Winding two ends, and time properly functioning, leakage current is minimum, in high-impedance state；When secondary circuit open circuit or a winding occur extremely crossing stream; the voltage that Secondary Winding produces is significantly larger than normal operating voltage; now protector can rapidly action and short-circuit; simultaneously; display unit can show contactless signals collecting, and after Failure elimination, signal gathering unit is able to receive that signal; can manually or automatically resetting, circuit continues in normal operation input state.
Technological means disclosed in this utility model scheme is not limited only to the technological means disclosed in above-mentioned embodiment, also includes the technical scheme being made up of above technical characteristic combination in any.It should be pointed out that, for those skilled in the art, under the premise without departing from this utility model principle, it is also possible to make some improvements and modifications, these improvements and modifications are also considered as protection domain of the present utility model.
Claims (4)
1. a Current Transformer Secondary overvoltage protection device; it is characterized in that: include microprocessor, current transformer, Secondary Winding link, signal gathering unit, signal receiving unit, display unit; alarm unit; electric power supply unit; described microprocessor is connected with current transformer, signal gathering unit, signal receiving unit, display unit; described current transformer is connected with Secondary Winding link, and Secondary Winding connection is connected with alarm unit, signal gathering unit is connected with signal receiving unit.
2. Current Transformer Secondary overvoltage protection device according to claim 1, it is characterised in that: described current transformer is arranged on the three-phase of Secondary Winding link, and Secondary Winding link is connected with signal gathering unit.
3. Current Transformer Secondary overvoltage protection device according to claim 1, it is characterised in that: described Secondary Winding link is set to Y-connection.
4. Current Transformer Secondary overvoltage protection device according to claim 1, it is characterised in that: described electric power supply unit includes AC220V power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620109232.5U CN205377261U (en) | 2016-02-03 | 2016-02-03 | Secondary over -voltage protector of current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620109232.5U CN205377261U (en) | 2016-02-03 | 2016-02-03 | Secondary over -voltage protector of current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205377261U true CN205377261U (en) | 2016-07-06 |
Family
ID=56263032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620109232.5U Expired - Fee Related CN205377261U (en) | 2016-02-03 | 2016-02-03 | Secondary over -voltage protector of current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205377261U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107171286A (en) * | 2017-07-01 | 2017-09-15 | 合肥东玖电气有限公司 | A kind of Current Transformer Secondary side overvoltage protection |
| CN107390007A (en) * | 2017-07-01 | 2017-11-24 | 合肥东玖电气有限公司 | One kind can hold greatly overvoltage protection device |
| CN109617015A (en) * | 2018-12-06 | 2019-04-12 | 安徽凯川电力保护设备有限公司 | A kind of Current Transformer Secondary overvoltage intelligent protection system |
-
2016
- 2016-02-03 CN CN201620109232.5U patent/CN205377261U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107171286A (en) * | 2017-07-01 | 2017-09-15 | 合肥东玖电气有限公司 | A kind of Current Transformer Secondary side overvoltage protection |
| CN107390007A (en) * | 2017-07-01 | 2017-11-24 | 合肥东玖电气有限公司 | One kind can hold greatly overvoltage protection device |
| CN109617015A (en) * | 2018-12-06 | 2019-04-12 | 安徽凯川电力保护设备有限公司 | A kind of Current Transformer Secondary overvoltage intelligent protection system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11349298B2 (en) | Power supply grounding fault protection circuit | |
| CN103560479B (en) | A kind of loaded line failure detector circuit being applied to chopper reclosing and method | |
| CN102777666A (en) | Electromagnetic valve control circuit and electromagnetic valve closing self-checking method thereof | |
| CN205377261U (en) | Secondary over -voltage protector of current transformer | |
| CN102777665A (en) | Solenoid valve control circuit and solenoid valve switch-in self-checking method thereof | |
| CN205539381U (en) | Under -voltage relay of preventing false retrieval floodgate detection circuitry that opens and shuts | |
| CN207117169U (en) | Power distribution automation Feeder Terminal Unit for 10KV overhead line fault detects | |
| CN104377647B (en) | leakage protection circuit | |
| CN203522122U (en) | Load line fault detection circuit applied to circuit breaker reclosing | |
| CN202817702U (en) | Current leakage protection device | |
| CN103166176A (en) | Under-voltage protection tripper for low-voltage circuit breaker | |
| CN203103939U (en) | Secondary overvoltage protector for current transformer | |
| CN202433997U (en) | Specific circuit breaker circuit for pre-payment electricity meter | |
| CN202231406U (en) | Earth leakage protection device with earth connection live protection function | |
| CN104348149B (en) | A kind of 10kV voltage transformers primary side neutral ground control system | |
| CN201887437U (en) | Two-point grounding protective device for iron core of resistance type transformer | |
| CN206237118U (en) | With accurate overcurrent-overvoltage and under-voltage protection circuit | |
| CN204706873U (en) | A kind of overvoltage protective device for current transformer secondary side with detection control apparatus | |
| CN205195233U (en) | Power leakage protector | |
| CN104538954A (en) | Power supply device having overcurrent protection function and electric leakage protection function | |
| CN205489453U (en) | Leakage protective circuit | |
| CN205720458U (en) | A kind of voltage transformer secondary side neutral point overvoltage protection action recording device | |
| CN204205558U (en) | With the leakage protecting plug that ground wire high voltage detects | |
| CN205790759U (en) | A kind of power lightning protection socket | |
| CN210273479U (en) | Power supply safety protection circuit of card reader |
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: 20160706 Termination date: 20170203 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |