CN202711939U - Zero-sequence current mutual inductor with short-circuit protection function - Google Patents
Zero-sequence current mutual inductor with short-circuit protection function Download PDFInfo
- Publication number
- CN202711939U CN202711939U CN 201220347382 CN201220347382U CN202711939U CN 202711939 U CN202711939 U CN 202711939U CN 201220347382 CN201220347382 CN 201220347382 CN 201220347382 U CN201220347382 U CN 201220347382U CN 202711939 U CN202711939 U CN 202711939U
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- China
- Prior art keywords
- circuit protection
- short
- mutual inductor
- current mutual
- sequence current
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- Expired - Fee Related
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000004804 winding Methods 0.000 claims abstract description 10
- 239000003822 epoxy resin Substances 0.000 claims description 6
- 229920000647 polyepoxide Polymers 0.000 claims description 6
- 239000005300 metallic glass Substances 0.000 claims description 4
- 229920001971 elastomer Polymers 0.000 claims description 3
- 239000003063 flame retardant Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 abstract 1
- 230000035699 permeability Effects 0.000 description 2
- 230000003712 anti-aging effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002964 excitative effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The utility model relates to a zero-sequence current mutual inductor with a short-circuit protection function. The zero-sequence current mutual inductor comprises a circular iron core, wherein a secondary winding is coiled on the circular iron core, the circular iron is provided with a casing, a short-circuit protection module is arranged in the casing, and a terminal of the short-circuit protection module is in parallel connection with a secondary side leading-out terminal of the mutual inductor. According to the design of the short-circuit protection module, the secondary side leading-out terminal can be subjected to short circuit under the condition of an open circuit of the current mutual inductor, open-circuit operation of the current mutual inductor is avoided, the safe operation of the current mutual inductor and the personal safety of workers are guaranteed effectively.
Description
Technical field
The utility model relates to a kind of current transformer, is specifically related to a kind of zero sequence current mutual inductor with short-circuit protection function.
Background technology
Zero sequence current mutual inductor is a kind of current transformer for the supporting design of outdoor ring main unit.Along with the in recent years stable development of national economy, our country goes into overdrive to carry out the transformation of distribution automation.Power supply department requires more and more higher for power supply reliability, existing zero sequence current mutual inductor is applied in the electric power system, if the second generation open circuit, primary current will all for excitatory, make iron core seriously saturated.The magnetic flux of alternation will induce very high voltage on secondary coil, its peak value can reach several kilovolts even volt up to ten thousand, so high voltage acts on secondary coil and the secondary circuit, and with serious threat personal safety and device security, even coil insulation burns out because of overheated.
The utility model content
In order to overcome the defects under the prior art, the purpose of this utility model is to provide a kind of zero sequence circuit instrument transformer with short-circuit protection function, can effectively guarantee the safe operation of current transformer.
The technical solution of the utility model is: a kind of zero sequence current mutual inductor with short-circuit protection function; comprise annular core; be wound with secondary winding on the described annular core; described annular core is provided with shell; be provided with short circuit protection module in the described shell, the secondary side leading-out terminal of the terminals of described short circuit protection module instrument transformer in parallel.
Can be provided with the power taking CT that is used to described short circuit protection module power supply in the described shell.
Described short circuit protection module can comprise rectifier bridge and the electric capacity that connects successively.
Described short circuit protection module preferably adopts epoxide resin vacuum to be cast in the described shell.
Can be provided with secondary outlet terminal on the described shell, described secondary winding can be connected with described secondary outlet terminal by lead-out wire.
Described iron core is preferably the iron core that non-crystaline amorphous metal is made.
Described iron core and secondary winding all can adopt epoxide resin vacuum to be cast in the described shell.
The top of described shell can be provided with for fixing some nuts of instrument transformer.
Described shell be preferably can be fire-retardant plastic casing.
The outer surface of described shell can be provided with rubber protecting jacket.
The beneficial effects of the utility model are: the design of short circuit protection module, can be under the state of current transformer open circuit short circuit secondary outgoing line end, avoid the current transformer open circuit operation, effectively guarantee the safe operation of current transformer and staff's personal safety; The iron core that adopts non-crystaline amorphous metal to make, initial magnetic permeability that can the Effective Raise iron core.
Description of drawings
Fig. 1 is the structural representation of a kind of embodiment of the present utility model.
Embodiment
Provide a kind of zero sequence current mutual inductor with short-circuit protection function referring to Fig. 1, the utility model; comprise annular core; be wound with secondary winding on the described annular core; described annular core is provided with shell 1; be provided with short circuit protection module in the described shell; the secondary side leading-out terminal of the terminals of described short circuit protection module instrument transformer in parallel, described short circuit protection module can comprise rectifier bridge and the electric capacity that connects successively.The design of described short circuit protection module can be under the state of current transformer open circuit short circuit secondary outgoing line end, avoid the open circuit operation of current transformer, effectively guaranteed the safe operation of current transformer and staff's personal safety.
Can be provided with power taking CT in the described shell, for described short circuit protection module provides power supply.
Described short circuit protection module preferably adopts epoxide resin vacuum to be cast in the described shell.
Can be provided with secondary outlet terminal 2 on the described shell, described secondary winding can be connected with described secondary outlet terminal by lead-out wire, and described current transformer can be connected with external equipment by described secondary outlet terminal.
Described iron core is preferably the iron core that non-crystaline amorphous metal is made, and can effectively improve the initial magnetic permeability of described iron core.
Described iron core and secondary winding all can adopt epoxide resin vacuum to be cast in the described shell.
The top of described shell can be provided with some nuts, and quantity is preferably two, and model can be M10, is mainly used in the fixing of described current transformer.
Described shell be preferably can be fire-retardant the ambroin shell, the outer surface of described shell can be provided with rubber protecting jacket, uvioresistant is anti-aging effectively, increases the service life.
Claims (10)
1. zero sequence current mutual inductor with short-circuit protection function; comprise annular core; be wound with secondary winding on the described annular core; described annular core is provided with shell; it is characterized in that being provided with short circuit protection module in the described shell secondary side leading-out terminal of the terminals of described short circuit protection module instrument transformer in parallel.
2. the zero sequence current mutual inductor with short-circuit protection function as claimed in claim 1 is characterized in that being provided with in the described shell power taking CT that is used to described short circuit protection module power supply.
3. the zero sequence current mutual inductor with short-circuit protection function as claimed in claim 2 is characterized in that described short circuit protection module comprises rectifier bridge and the electric capacity that connects successively.
4. the zero sequence current mutual inductor with short-circuit protection function as claimed in claim 3 is characterized in that described short circuit protection module adopts epoxide resin vacuum to be cast in the described shell.
5. the zero sequence current mutual inductor with short-circuit protection function as claimed in claim 4 is characterized in that described shell is provided with secondary outlet terminal, and described secondary winding is connected with described secondary outlet terminal by lead-out wire.
6. such as claim 1,2,3,4 or 5 described zero sequence current mutual inductors with short-circuit protection function, it is characterized in that described iron core is the iron core that non-crystaline amorphous metal is made.
7. the zero sequence current mutual inductor with short-circuit protection function as claimed in claim 6 is characterized in that described iron core and secondary winding all adopt epoxide resin vacuum to be cast in the described shell.
8. the zero sequence current mutual inductor with short-circuit protection function as claimed in claim 7, the top that it is characterized in that described shell are provided with for fixing some nuts of instrument transformer.
9. the zero sequence current mutual inductor with short-circuit protection function as claimed in claim 8 is characterized in that described shell is plastic casing that can be fire-retardant.
10. the zero sequence current mutual inductor with short-circuit protection function as claimed in claim 9 is characterized in that the outer surface of described shell is provided with rubber protecting jacket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220347382 CN202711939U (en) | 2012-07-18 | 2012-07-18 | Zero-sequence current mutual inductor with short-circuit protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220347382 CN202711939U (en) | 2012-07-18 | 2012-07-18 | Zero-sequence current mutual inductor with short-circuit protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202711939U true CN202711939U (en) | 2013-01-30 |
Family
ID=47592218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220347382 Expired - Fee Related CN202711939U (en) | 2012-07-18 | 2012-07-18 | Zero-sequence current mutual inductor with short-circuit protection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202711939U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107808765A (en) * | 2017-12-21 | 2018-03-16 | 微能汇通（大连）电力技术有限公司 | Current transformer and its production method with embedded anti-open circuit module |
-
2012
- 2012-07-18 CN CN 201220347382 patent/CN202711939U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107808765A (en) * | 2017-12-21 | 2018-03-16 | 微能汇通（大连）电力技术有限公司 | Current transformer and its production method with embedded anti-open circuit module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Zero-sequence current mutual inductor with short-circuit protection function Effective date of registration: 20140506 Granted publication date: 20130130 Pledgee: Zhongguancun Beijing technology financing Company limited by guarantee Pledgor: Beijing Hyliton Power Technology Co., Ltd. Registration number: 2014990000327 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20150821 Granted publication date: 20130130 Pledgee: Zhongguancun Beijing technology financing Company limited by guarantee Pledgor: Beijing Hyliton Power Technology Co., Ltd. Registration number: 2014990000327 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130130 Termination date: 20190718 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |