CN203324465U - Device using voltage method to measure ratio of transformation of current transformer - Google Patents
Device using voltage method to measure ratio of transformation of current transformer Download PDFInfo
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- CN203324465U CN203324465U CN2013204018448U CN201320401844U CN203324465U CN 203324465 U CN203324465 U CN 203324465U CN 2013204018448 U CN2013204018448 U CN 2013204018448U CN 201320401844 U CN201320401844 U CN 201320401844U CN 203324465 U CN203324465 U CN 203324465U
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- current transformer
- voltage
- current
- measuring
- secondary coil
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000009466 transformation Effects 0.000 title abstract 3
- 238000004804 winding Methods 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 abstract description 6
- 230000005284 excitation Effects 0.000 abstract 2
- 230000007547 defect Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 2
- 101100136092 Drosophila melanogaster peng gene Proteins 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Measurement Of Current Or Voltage (AREA)
Abstract
A device using a voltage method to measure the ratio of transformation of a current transformer is provided. The device comprises a current transformer (1); two terminals (L1) of a primary coil (L) at one end of the current transformer (1) are connected with of a millivoltmeter (mV) for measuring the voltage of the current transformer; two terminals (K1) of a secondary coil (K) at the other end of the current transformer (1) are connected with a voltage regulator (V); the voltage regulator (V) is connected in parallel with a voltmeter (U) for measuring the voltage of a secondary side of the current transformer; and the secondary coil (K) is connected in series with a milliammeter (mA) for measuring the excitation current of the current transformer (1). With the device adopted, defects such as large errors of an existing current method for measuring the ratio of transformation of a current transformer can be eliminated. The device of the utility model is light and is suitable for field testing. A user only needs to pay attention to that the excitation current of the secondary coil is smaller than 10mA, such that a certain degree of accuracy can be ensured.
Description
Technical field
The utility model relates to a kind of voltage method and measures the current transformer ratio device.
Background technology
More than Peng River water power company generator outlet current transformer electric current reaches Wan An training, measure current transformer ratio by traditional current method, the standard current transformer needed or the volume of current lifting device are large, cost is high, if reducing tested current transformer primary current is tested, ratio error can be very large, tests just meaningless.Current transformer ratio is related to the accuracy of metering and the reliability of protection, and the no-load voltage ratio test is exhausted indispensable pilot project.
Summary of the invention
The purpose of this utility model is to overcome the weak point of above-mentioned existing background technology, and provides a kind of voltage method to measure the current transformer ratio device.The method of measuring current transformer ratio with voltage method is applicable to site test, and equipment is few, and circuit is simple, easy to operate.
The purpose of this utility model reaches by following measure: voltage method is measured the current transformer ratio device, it comprises current transformer, and two connecting terminals on current transformer one end primary winding are connected to the voltage milivoltmeter of a measurement current transformer; Be connected with a pressure regulator on two terminals on current transformer other end secondary coil, described pressure regulator is in parallel with the voltage table of measuring Current Transformer Secondary side voltage; Be in series with the milliammeter of measuring the current transformer exciting current on described secondary coil.
The advantage that voltage method is surveyed the current transformer ratio device is that testing equipment weight is lighter, is applicable to site test, only needs a little pressure regulator, a voltage table, a milivoltmeter, a milivoltmeter.Only to notice that the exciting current that limits secondary coil is less than 10mA, can guarantee certain accuracy.
The accompanying drawing explanation
Fig. 1 is the structural representation that the utility model voltage method is measured the current transformer ratio device.
1. current transformers in figure, L. primary winding, two terminals of L1., V. pressure regulator, K. secondary coil, two terminals of K1., mA. milliammeter, mV. voltage milivoltmeter, U. voltage table.
Embodiment
Describe performance of the present utility model in detail below in conjunction with accompanying drawing, but they do not form to restriction of the present utility model, only for example.Simultaneously by illustrating that advantage of the present utility model will become more clear and easily understand.
Consult accompanying drawing known: the utility model voltage method is measured the current transformer ratio device, and it comprises current transformer 1, and two terminal L1 on the primary winding L of current transformer 1 one ends are connected with the voltage milivoltmeter mV of a measurement current transformer; Be connected with a pressure regulator V on two terminal K1 on current transformer 1 other end secondary coil K, described pressure regulator V is in parallel with the voltage table U that measures Current Transformer Secondary side voltage; Be in series with the milliammeter mA that measures current transformer 1 exciting current on described secondary coil K.
Wiring of the present utility model and test method are as follows: meet a pressure regulator V as voltage source at two terminal K1 of current transformer 1 secondary coil K, a voltage table U in parallel measures the voltage of Current Transformer Secondary side simultaneously; Connect at two terminal L1 of current transformer 1 primary winding L the voltage that a milivoltmeter mA measures the current transformer primary side; While with voltage method, surveying current transformer ratio, as long as pressure regulator voltage is slightly high, exciting current increases a lot.Due to current transformer primary winding open circuit, magnetic unshakable in one's determination is close very high, very easily saturated.
Other unspecified part is prior art.
Claims (1)
1. voltage method is measured the current transformer ratio device, and it comprises current transformer (1), and two terminals (L1) on current transformer (1) one end primary winding (L) are connected with the voltage milivoltmeter (mV) of a measurement current transformer; Be connected with a pressure regulator (V) on two terminals (K1) on current transformer (1) other end secondary coil (K), described pressure regulator (V) is in parallel with the voltage table (U) of measuring Current Transformer Secondary side voltage; Be in series with the milliammeter (mA) of measuring the current transformer exciting current on described secondary coil (K).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013204018448U CN203324465U (en) | 2013-07-08 | 2013-07-08 | Device using voltage method to measure ratio of transformation of current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013204018448U CN203324465U (en) | 2013-07-08 | 2013-07-08 | Device using voltage method to measure ratio of transformation of current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203324465U true CN203324465U (en) | 2013-12-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013204018448U Expired - Fee Related CN203324465U (en) | 2013-07-08 | 2013-07-08 | Device using voltage method to measure ratio of transformation of current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203324465U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106093609A (en) * | 2016-08-04 | 2016-11-09 | 深圳供电局有限公司 | A kind of little output capacity Current Mutual Inductance no-load voltage ratio method of testing and device |
| CN110133565A (en) * | 2019-06-20 | 2019-08-16 | 安徽马钢设备检修有限公司 | A kind of voltage transformer method of calibration |
-
2013
- 2013-07-08 CN CN2013204018448U patent/CN203324465U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106093609A (en) * | 2016-08-04 | 2016-11-09 | 深圳供电局有限公司 | A kind of little output capacity Current Mutual Inductance no-load voltage ratio method of testing and device |
| CN110133565A (en) * | 2019-06-20 | 2019-08-16 | 安徽马钢设备检修有限公司 | A kind of voltage transformer method of calibration |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131204 |
|
| CU01 | Correction of utility model | ||
| CU01 | Correction of utility model |
Correction item: Termination upon expiration of patent Correct: Revocation of Patent Expiration and Termination False: On July 25, 2023, the expiration and termination of the 39-volume 3001 patent Number: 30-01 Volume: 39 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131204 |