CN204287380U - Transformer current mutual inductor polarity tester - Google Patents
Transformer current mutual inductor polarity tester Download PDFInfo
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- CN204287380U CN204287380U CN201420721247.8U CN201420721247U CN204287380U CN 204287380 U CN204287380 U CN 204287380U CN 201420721247 U CN201420721247 U CN 201420721247U CN 204287380 U CN204287380 U CN 204287380U
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- mutual inductor
- current
- transformer
- current mutual
- voltage side
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Abstract
The utility model provides a kind of transformer current mutual inductor polarity tester, it comprises: housing and the control circuit board be located in described housing, described housing is provided with the current acquisition joint of the difference current for gathering step down side, medium voltage side and high voltage side current mutual inductor, described control circuit board is provided with control chip and is connected to the supply module of described control chip, memory module and display translation module, and described current acquisition joint is electrically connected at control chip and memory module.The utility model transformer current mutual inductor polarity tester shortens detection time, improves the accuracy of detection efficiency and detection, is conducive to the potential safety hazard of Timeliness coverage transformer, ensures the normal operation of whole power equipment.
Description
Technical field
The utility model relates to the technical field of power equipment, particularly a kind of transformer current mutual inductor polarity tester.
Background technology
After transformer runs, whether the loop winding polarities such as each side of transformer is differential in order to verify, measurement, metering are correct, whether current return balances, existing method normally does onload examination when transformer puts into operation with phase meter, then draws phasor graph analysis.But, the method at substantial time, and easily make mistakes, if do not have Timeliness coverage to hide problem, just probably bury potential safety hazard, cause transformer trip accident, affect the normal operation of transformer and whole power equipment.
Utility model content
For overcoming existing defect, the utility model proposes a kind of transformer current mutual inductor polarity tester, it can shorten detection time, improves the accuracy of detection efficiency and detection.
According to an aspect of the present utility model, the utility model proposes a kind of transformer current mutual inductor polarity tester, it comprises: housing and the control circuit board be located in described housing, described housing is provided with the current acquisition joint of the difference current for gathering step down side, medium voltage side and high voltage side current mutual inductor, described control circuit board is provided with control chip and is connected to the supply module of described control chip, memory module and display translation module, and described current acquisition joint is electrically connected at control chip and memory module.
Further, in above-mentioned transformer current mutual inductor polarity tester, described housing is rectangular parallelepiped, it comprises positive side and the front end face perpendicular to described positive side, the front end face of described housing is located at by described current acquisition joint, described positive side is provided with display screen, and described display screen is electrically connected at supply module and display translation module.
Further, in above-mentioned transformer current mutual inductor polarity tester, described positive side is also provided with multiple operation push-button for input control operational order, described multiple operation push-button is electrically connected at control chip.
Further, in above-mentioned transformer current mutual inductor polarity tester, described current acquisition joint comprises multiple voltage wiring terminal in the differential circuit for being electrically connected at step down side, medium voltage side and high voltage side current mutual inductor and current wiring terminal.
Further, in above-mentioned transformer current mutual inductor polarity tester, described supply module is lithium battery.
The utility model transformer current mutual inductor polarity tester shortens detection time, improves the accuracy of detection efficiency and detection, is conducive to the potential safety hazard of Timeliness coverage transformer, ensures the normal operation of whole power equipment.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model transformer current mutual inductor polarity tester;
Fig. 2 is the structural representation of control circuit board in the utility model;
Fig. 3 is the relation schematic diagram of the three side difference currents of transformer when normally working;
The relation schematic diagram of three side difference currents when Fig. 4 a is the reverse polarity connection of high voltage side of transformer current transformer;
The relation schematic diagram of three side difference currents when Fig. 4 b is the reverse polarity connection of transformer medium voltage side current transformer;
The relation schematic diagram of three side difference currents when Fig. 4 c is the reverse polarity connection of step down side current transformer;
The relation schematic diagram of three side difference currents when Fig. 5 a is the phase offset of high voltage side of transformer current transformer;
The relation schematic diagram of three side difference currents when Fig. 5 b is the phase offset of transformer medium voltage side current transformer;
The relation schematic diagram of three side difference currents when Fig. 5 c is the phase offset of step down side current transformer.
In order to the structure of embodiment of the present utility model clearly can be realized, specific size, structure and device are marked in the drawings, but this is only signal needs, be not intended to the utility model is limited in this specific dimensions, structure, device and environment, according to specific needs, these devices and environment can carry out adjusting or revising by those of ordinary skill in the art, and the adjustment carried out or amendment are still included in the scope of accompanying claim.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.
In the following description, by description multiple different aspect of the present utility model, but, for those skilled in the art, can only utilize some or all structure of the present utility model or flow process to implement the utility model.In order to the definition explained, set forth specific number, configuration and order, but clearly, also can implement the utility model when there is no these specific detail.In other cases, in order to not obscure the utility model, will no longer be described in detail for some well-known features.
Refer to Fig. 1 and Fig. 2, the utility model provides a kind of transformer current mutual inductor polarity tester, comprise: housing 1 and the control circuit board (not shown) be located in described housing 1, described housing 1 is provided with the current acquisition joint 2 of the difference current for gathering step down side, medium voltage side and high voltage side current mutual inductor, described control circuit board is provided with control chip 3 and is connected to the supply module 4 of described control chip 3, memory module 5 and display translation module 6, and described current acquisition joint 2 is electrically connected at control chip 3 and memory module 5.
Wherein, described housing 1 is rectangular parallelepiped, it comprises positive side 11 and the front end face 12 perpendicular to described positive side 11, the front end face 12 of described housing 1 is located at by described current acquisition joint 2, described positive side 11 is provided with display screen 13, described display screen 13 is electrically connected at supply module 4 and display translation module 6, for exporting data processed result.In the present embodiment, described display screen 13 is LCDs.
Described positive side 11 is also provided with multiple operation push-button 14, and described multiple operation push-button 14 is electrically connected at control chip 3, for input control operational order, such as, starts shooting, shuts down, measuring ability and parameter switching etc.
Described current acquisition joint 2 comprises multiple voltage wiring terminal 22 and current wiring terminal 24, by described voltage wiring terminal 22 and current wiring terminal 24 being electrically connected in the differential circuit of step down side, medium voltage side and high voltage side current mutual inductor, thus gather differential voltage and the current data of step down side, medium voltage side and high voltage side current mutual inductor.
Described memory module 5 is for the differential voltage of the step down side of storage of collected, medium voltage side and high voltage side current mutual inductor and current data.
Described supply module 4 can be lithium battery, for control chip 3 and display screen 13 provide power supply.
Refer to Fig. 3 to Fig. 5 c, the principle of work of the utility model transformer current mutual inductor polarity tester is as follows:
For the differential circuit of step down side, medium voltage side and high voltage side current mutual inductor, there is following formula:
Ir＝(Ih
1+KmIm
1+K
lI
l 1)/2
Wherein, Id is difference current, and Ir is stalling current;
for the high-pressure side difference current after correction,
for the medium voltage side difference current after correction,
for the low-pressure side difference current after correction; Km is medium voltage side penalty coefficient, K
lfor low-pressure side penalty coefficient.
When transformer normally works, as shown in Figure 3, difference current Id is zero, and it is non-vanishing that stalling current Ir is greater than difference current Id, i.e. Id=0, Ir>0.
When the reverse polarity connection of high voltage side of transformer current transformer, as shown in fig. 4 a, Id>0, Ir>0 and
when the reverse polarity connection of transformer medium voltage side current transformer, as shown in Figure 4 b, Id>0; Ir>0 and
when the reverse polarity connection of step down side current transformer, as illustrated in fig. 4 c, Id>0, Ir>0 and
Be subject to certain impact when the phase place of high voltage side of transformer current transformer and create deviation angle θ, as shown in Figure 5 a, then having:
such as: high pressure side joint is instead then equivalent to high-pressure side and offset by 180 degree, from above formula:
Be subject to certain impact when the phase place of transformer medium voltage side current transformer and create deviation angle θ, as shown in Figure 5 b, then having:
such as: medium voltage side connects and is instead then equivalent to medium voltage side and offset by 180 degree, from above formula:
Be subject to certain impact when the phase place of step down side current transformer and create deviation angle θ, as shown in Figure 5 c, then having:
such as: low pressure side joint is instead then equivalent to medium voltage side and offset by 180 degree, from above formula:
Like this, the utility model transformer current mutual inductor polarity tester is connected to step down side respectively by current acquisition joint, the differential circuit of medium voltage side and high voltage side current mutual inductor, collect step down side, the differential voltage of medium voltage side and high voltage side current mutual inductor and current data, differential voltage and current data is calculated by described control chip, can judge that whether the polarity of three side winding connections is correct, whether each side balances, whether three side phase angles produce skew and deviation angle numerical values recited etc., and show result by display screen 13, staff shows data according to tester, get final product the potential safety hazard of Timeliness coverage transformer, ensure the normal operation of whole power equipment.
Compared to prior art, the utility model transformer current mutual inductor polarity tester is by gathering differential voltage and the current data of step down side, medium voltage side and high voltage side current mutual inductor, and then directly calculating judges that whether step down side, medium voltage side and high voltage side current mutual inductor polarity be correct, and whether current return balances, this tester shortens detection time, improve the accuracy of detection efficiency and detection, be conducive to the potential safety hazard of Timeliness coverage transformer, ensure the normal operation of whole power equipment.
Finally it should be noted that, above embodiment is only in order to describe the technical solution of the utility model instead of to limit this technical method, the utility model can extend in application other amendment, change, application and embodiment, and therefore think that all such amendments, change, application, embodiment are all in spirit of the present utility model and teachings.
Claims (5)
1. a transformer current mutual inductor polarity tester, it is characterized in that, it comprises: housing and the control circuit board be located in described housing, described housing is provided with the current acquisition joint of the difference current for gathering step down side, medium voltage side and high voltage side current mutual inductor, described control circuit board is provided with control chip and is connected to the supply module of described control chip, memory module and display translation module, and described current acquisition joint is electrically connected at control chip and memory module.
2. transformer current mutual inductor polarity tester according to claim 1, it is characterized in that, described housing is rectangular parallelepiped, it comprises positive side and the front end face perpendicular to described positive side, the front end face of described housing is located at by described current acquisition joint, described positive side is provided with display screen, and described display screen is electrically connected at supply module and display translation module.
3. transformer current mutual inductor polarity tester according to claim 2, is characterized in that, described positive side is also provided with multiple operation push-button for input control operational order, and described multiple operation push-button is electrically connected at control chip.
4. transformer current mutual inductor polarity tester according to claim 1, it is characterized in that, described current acquisition joint comprises multiple voltage wiring terminal in the differential circuit for being electrically connected at step down side, medium voltage side and high voltage side current mutual inductor and current wiring terminal.
5. the transformer current mutual inductor polarity tester according to any one of Claims 1 to 4, is characterized in that, described supply module is lithium battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420721247.8U CN204287380U (en) | 2014-11-26 | 2014-11-26 | Transformer current mutual inductor polarity tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420721247.8U CN204287380U (en) | 2014-11-26 | 2014-11-26 | Transformer current mutual inductor polarity tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204287380U true CN204287380U (en) | 2015-04-22 |
Family
ID=52870529
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420721247.8U Expired - Fee Related CN204287380U (en) | 2014-11-26 | 2014-11-26 | Transformer current mutual inductor polarity tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204287380U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108802659A (en) * | 2018-08-22 | 2018-11-13 | 湖北仪天成电力设备有限公司 | A kind of frequency conversion type mutual inductor comprehensive tester |
-
2014
- 2014-11-26 CN CN201420721247.8U patent/CN204287380U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108802659A (en) * | 2018-08-22 | 2018-11-13 | 湖北仪天成电力设备有限公司 | A kind of frequency conversion type mutual inductor comprehensive tester |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20150422 Termination date: 20211126 |