CN205069357U - Self -power computer current transformer for protection device - Google Patents
Self -power computer current transformer for protection device Download PDFInfo
- Publication number
- CN205069357U CN205069357U CN201520834684.5U CN201520834684U CN205069357U CN 205069357 U CN205069357 U CN 205069357U CN 201520834684 U CN201520834684 U CN 201520834684U CN 205069357 U CN205069357 U CN 205069357U
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- winding
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- box
- current transformer
- protecting device
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Abstract
The utility model discloses a self -power computer current transformer for protection device, including protecting the box, offered the through -hole at this center of protecting the box, there is multiunit cable fastener at this through -hole internal fixation, protecting the built -in secondary coil subassembly that is equipped with of box, the whole circular ring shaped structure that is of this secondary coil subassembly the lower part coiling of secondary coil subassembly has secondary winding, and this secondary winding constitutes with the protection winding by measuring the winding, and the output of wherein measuring the winding is used for connecting self -power computer protection device's power input end, the output of protection winding is used for connecting self -power computer protection device's protection sample current input still be fixed with the secondary lead -out wire on protecting the outer wall of box, this secondary lead -out wire with the secondary winding electricity is connected. It is showing the effect: not only can self -power protection device can be provided sufficient start -up electric energy simultaneously for computer protection device provides the power, and then the continual and steady operation of computer protection device is guaranteed.
Description
Technical field
The utility model relates to current transformer technical field, specifically, is a kind of self-powered microcomputer protecting device Current Transformer.
Background technology
Microcomputer protecting device can react the fault of electric equipment and abnormal working position and automatically promptly, selectively action in circuit breaker, faulty equipment is excised from system; ensure that faulty equipment continues normal operation; accident is limited in minimum zone; improve the reliability of system cloud gray model, ensure to user security to greatest extent, power continuously.
In the transformer station of industrial and mining enterprises, often lack the protection fixed value adjusting personnel of specialty, the definite value of electrician to protective device being responsible for day-to-day operation maintenance is also known little about it.Therefore, be badly in need of one and can provide power supply for microcomputer protecting device, microcomputer protecting device can be provided enough to start the current transformer of electric energy simultaneously, thus ensure the operation that microcomputer protecting device is continual and steady.
Utility model content
For the deficiencies in the prior art, the purpose of this utility model is to provide a kind of self-powered microcomputer protecting device Current Transformer, and this current transformer can provide power supply for microcomputer protecting device, can provide simultaneously enough start electric energy to Self-power protective device.
For achieving the above object, the technical solution adopted in the utility model is as follows:
A kind of self-powered microcomputer protecting device Current Transformer, its key is: comprise and protect box, the center protecting box at this offers through hole, the sidewall of this through hole is fixed with many group cable fasteners, protecting in box outside described through hole is equiped with secondary coil assembly, this secondary coil component integration is circular ring, secondary winding is wound with in the bottom of described secondary coil assembly, this secondary winding is by measuring winding and protective winding is formed, wherein measure the output of winding for connecting the power input of self-powered microcomputer protecting device, the output of described protective winding is for connecting the protection sample rate current input of self-powered microcomputer protecting device, the described outer wall protecting box is also fixed with secondary lead-out wire, this secondary lead-out wire is electrically connected with described secondary winding.
This current transformer adopts biquadratic winding to export design, wherein measures winding 0.5 grade for the input of Self-power protective device power supply, and protective winding 10P10 level is used for the input of Self-power protective device protection sample rate current; And measurement winding (power supply winding 0.5 grade) has special technical requirement; require that the load capacity measuring winding is not less than 5VA, ensure the startup electric energy that circuit load current can provide Self-power protective device enough 10% of specified CT no-load voltage ratio time.By technique scheme, power supply can not only be provided for microcomputer protecting device, the startup electric energy that simultaneously Self-power protective device can be provided enough, and then ensure the operation that microcomputer protecting device is continual and steady.
Further, described secondary coil assembly comprises a circular iron core, exposed portion is provided with in the left and right sides of this iron core, iron core above this exposed portion is covered with the first insulating barrier, iron core below this exposed portion is covered with the second insulating barrier, described secondary winding is wound on this second insulating barrier, and described secondary winding is also covered with the 3rd insulating barrier.
Further, described first insulating barrier, the second insulating barrier and the 3rd insulation layer structure are consistent, and form by crimped paper and PVC tape.
Further, described in protect the overall cylindrical structure of box, on the outer wall that this protects box, hoop is provided with anchor ear, and the two ends of this anchor ear are bolted fixing.
Further, be connected with plug connector at the free end of described secondary lead-out wire, this plug connector is for connecting external load.
Further, described cable fastener is three groups, and three groups of cable fasteners are evenly distributed on the sidewall of described through hole.
By above-mentioned cable fastener, can the be stable electric current in cable be adopted, thus can be continual and steady provide power supply to microcomputer protecting device.
Remarkable result of the present utility model is: structure is simple, is easy to realize, can not only provides power supply for microcomputer protecting device, the startup electric energy that simultaneously Self-power protective device can be provided enough, and then ensures the operation that microcomputer protecting device is continual and steady.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the left view of Fig. 1;
Fig. 3 is the structural representation of described secondary coil assembly;
Fig. 4 is the sectional drawing of Fig. 3;
Fig. 5 is the direction of winding schematic diagram of described secondary winding.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model and operation principle are described in further detail.
As shown in Fig. 1 ~ Fig. 5, a kind of self-powered microcomputer protecting device Current Transformer, comprise and protect box 1, describedly protect the overall cylindrical structure of box 1, through hole 2 is offered at the center that this protects box 1, the sidewall of this through hole 2 is fixed with many group cable fasteners 3, protecting in box 1 outside described through hole 2 is equiped with secondary coil assembly 4, this secondary coil assembly 4 entirety is in circular ring, secondary winding 41 is wound with in the bottom of described secondary coil assembly 4, this secondary winding 41 is made up of measurement winding and protective winding, wherein measure the output of winding for connecting the power input of self-powered microcomputer protecting device, the output of described protective winding is for connecting the protection sample rate current input of self-powered microcomputer protecting device, the described outer wall protecting box 1 is also fixed with secondary lead-out wire 5, this secondary lead-out wire 5 is electrically connected with described secondary winding 41, plug connector 8 is connected with at the free end of described secondary lead-out wire 5, this plug connector 8 is for connecting external load, on the outer wall that this protects box 1, hoop is provided with anchor ear 6, the two ends of this anchor ear 6 are connected and fixed by bolt 7.
See accompanying drawing 3 ~ accompanying drawing 4, described secondary coil assembly 4 comprises a circular iron core 42, exposed portion 43 is provided with in the left and right sides of this iron core 42, iron core 42 above this exposed portion 43 is covered with the first insulating barrier 44, iron core 42 below this exposed portion 43 is covered with the second insulating barrier 45, described secondary winding 41 is wound on this second insulating barrier 45, and described secondary winding 41 is also covered with the 3rd insulating barrier 46.
See accompanying drawing 5, the direction of winding of described secondary winding 41 is counterclockwise.
In this example, described first insulating barrier 44, second insulating barrier 45 and the 3rd insulating barrier 46 structure unanimously, and are formed by crimped paper and PVC tape.
In this example, as preferably, described cable fastener 3 is three groups, and three groups of cable fasteners 3 are evenly distributed on the sidewall of described through hole 2.
This current transformer adopts biquadratic winding to export design, wherein measures winding 0.5 grade for the input of Self-power protective device power supply, and protective winding 10P10 level is used for the input of Self-power protective device protection sample rate current; And measurement winding power supply winding 0.5 grade has special technical requirement, requires that the load capacity measuring winding is not less than 5VA, ensures the startup electric energy that circuit load current can provide Self-power protective device enough 10% of specified CT no-load voltage ratio time.
The utility model additionally provides a kind of method of testing; ensure that the power supply provided normally can be used by Self-power protective device: measure winding 1S1-1S2 in Current Transformer Secondary and access about 2K ohm; the load of power about 5W; the magnitude of voltage at 1S1-1S2 two ends is measured with ac voltage range of a universal meter; as shown in table 1; meet following table requirement, just can use.
Table 1: the output voltage meter of this current transformer when different CT
| Current transformer primary current (A) | The magnitude of voltage (V) at Current Transformer Secondary 1S1-1S2 two ends |
| 10%CT specified CT no-load voltage ratio value | Be greater than 10V |
| 50%CT specified CT no-load voltage ratio value | Be greater than 20V |
| 100 ~ 200%CT specified CT no-load voltage ratio value | Be greater than 20V and be less than 30V |
| Be greater than 200%CT specified CT no-load voltage ratio value | Be less than 40V (CT is saturated, and voltage no longer increases) |
Claims (6)
1. a self-powered microcomputer protecting device Current Transformer, it is characterized in that: comprise and protect box (1), through hole (2) is offered at the center that this protects box (1), the sidewall of this through hole (2) is fixed with many groups cable fastener (3), secondary coil assembly (4) is equiped with protecting in box (1) of described through hole (2) outside, this secondary coil assembly (4) entirety is in circular ring, secondary winding (41) is wound with in the bottom of described secondary coil assembly (4), this secondary winding (41) is made up of measurement winding and protective winding, wherein measure the output of winding for connecting the power input of self-powered microcomputer protecting device, the output of described protective winding is for connecting the protection sample rate current input of self-powered microcomputer protecting device, the described outer wall protecting box (1) is also fixed with secondary lead-out wire (5), this secondary lead-out wire (5) is electrically connected with described secondary winding (41).
2. self-powered microcomputer protecting device Current Transformer according to claim 1, it is characterized in that: described secondary coil assembly (4) comprises a circular iron core (42), exposed portion (43) is provided with in the left and right sides of this iron core (42), the iron core (42) of this top, exposed portion (43) is covered with the first insulating barrier (44), the iron core (42) of this below, exposed portion (43) is covered with the second insulating barrier (45), described secondary winding (41) is wound on this second insulating barrier (45), described secondary winding (41) is also covered with the 3rd insulating barrier (46).
3. self-powered microcomputer protecting device Current Transformer according to claim 2; it is characterized in that: described first insulating barrier (44), the second insulating barrier (45) and the 3rd insulating barrier (46) structure are consistent, and form by crimped paper and PVC tape.
4. self-powered microcomputer protecting device Current Transformer according to claim 1; it is characterized in that: described in protect the overall cylindrical structure of box (1); on the outer wall that this protects box (1), hoop is provided with anchor ear (6), and the two ends of this anchor ear (6) are connected and fixed by bolt (7).
5. self-powered microcomputer protecting device Current Transformer according to claim 1; it is characterized in that: be connected with plug connector (8) at the free end of described secondary lead-out wire (5), this plug connector (8) is for connecting external load.
6. self-powered microcomputer protecting device Current Transformer according to claim 1, is characterized in that: described cable fastener (3) is three groups, and three groups of cable fasteners (3) are evenly distributed on the sidewall of described through hole (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520834684.5U CN205069357U (en) | 2015-10-26 | 2015-10-26 | Self -power computer current transformer for protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520834684.5U CN205069357U (en) | 2015-10-26 | 2015-10-26 | Self -power computer current transformer for protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205069357U true CN205069357U (en) | 2016-03-02 |
Family
ID=55395877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520834684.5U Expired - Fee Related CN205069357U (en) | 2015-10-26 | 2015-10-26 | Self -power computer current transformer for protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205069357U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105304304A (en) * | 2015-10-26 | 2016-02-03 | 常州欧瑞电气有限公司 | Current transformer for self-powered microprocessor protection device |
-
2015
- 2015-10-26 CN CN201520834684.5U patent/CN205069357U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105304304A (en) * | 2015-10-26 | 2016-02-03 | 常州欧瑞电气有限公司 | Current transformer for self-powered microprocessor protection device |
| CN105304304B (en) * | 2015-10-26 | 2017-07-04 | 常州欧瑞电气股份有限公司 | Self-powered microcomputer protecting device Current Transformer |
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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 | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 213100 No. 502, Changting Road, Wujin Economic Development Zone, Jiangsu, Changzhou Patentee after: Changzhou Orient Electric Co., Ltd. Address before: 213100 No. 502, Changting Road, Wujin Economic Development Zone, Jiangsu, Changzhou Patentee before: ORIENT ELECTRIC CO., LTD. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160302 Termination date: 20171026 |