CN202330692U - Field check equipment for accuracy of current transformer - Google Patents
Field check equipment for accuracy of current transformer Download PDFInfo
- Publication number
- CN202330692U CN202330692U CN2011204569865U CN201120456986U CN202330692U CN 202330692 U CN202330692 U CN 202330692U CN 2011204569865 U CN2011204569865 U CN 2011204569865U CN 201120456986 U CN201120456986 U CN 201120456986U CN 202330692 U CN202330692 U CN 202330692U
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- current transformer
- pressure regulator
- input side
- lifting device
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Abstract
The utility model relates to field check equipment for accuracy of a current transformer. The field check equipment is characterized in that the field check equipment comprises a voltage regulator (YT), the input side of the voltage regulator (YT) is connected with a three-phase power supply, the output side of the voltage regulator (YT) is connected with the input side of a strong current generator (ST) and the input side and the output side of the strong current generator (ST) are connected with capacitors (C) in parallel. By adopting the equipment, the requirements on the capacity of the power supply, the voltage regulator and the strong current generator are reduced. The field check equipment for the accuracy of the current transformer has the advantages that the capacity of the voltage regulator and the strong current generator is not required to be too high, the volume of single equipment is small, the transportation is facilitated, the field layout and wiring are also easier to conduct and the difficulty in field testing is greatly reduced.
Description
Technical field
The utility model relates to a kind of current transformer accuracy field-checking equipment.
Background technology
When carrying out the big current error field-checking test of current transformer at present; The method that adopts output voltage regulator to connect current lifting device input end, current lifting device output termination test loop is carried out big electric current up-flow; For reducing the pressure regulator output current; Reduce the experiment power supply capacity, take to carry out in the mode of current lifting device input side and outgoing side shnt capacitor compensation simultaneously.
When carrying out the current transformer error measurement; Generally only use current lifting device and pressure regulator can provide the current transformer primary side desired primary current I1, but for the verification of 800kV potting breaker casing current transformer site error, because the test loop is long, impedance is big; And the rated current of current transformer is also big; Loop perception capacity accounts for whole circuit volume more than 80%, applies at needs under the situation of bigger primary current, and usual manner can't satisfy the verification requirement.
The utility model content
The purpose of the utility model provides a kind of current transformer accuracy field-checking equipment; Can reduce the input capacity of pressure regulator and current lifting device; Also make the capacitance of on-the-spot compensation realize easily, thereby under 1%～120% total current, adopt relative method current transformer to be carried out the verification of accuracy.
A kind of current transformer accuracy field-checking equipment; Its special feature is, comprises a pressure regulator, the input side joint three phase supply power supply of this pressure regulator; The input side of output side joint one current lifting device of this pressure regulator, the input side of this current lifting device and outgoing side all are parallel with electric capacity.
Adopt the utility model equipment to reduce capacity requirement to power supply, pressure regulator and current lifting device.The advantage that is equipped with like this is that the capacity of pressure regulator and current lifting device need not be too big, little, the convenient transportation of single devices volume, and on-the-spot layout and wiring make the difficulty of site test reduce greatly also than being easier to.
Description of drawings
Accompanying drawing 1 is the circuit theory diagrams of the utility model.
Embodiment
As shown in Figure 1; A kind of current transformer accuracy field-checking equipment comprises a pressure regulator YT, the input side joint three phase supply power supply of this pressure regulator YT; The input side of the output side joint one current lifting device ST of this pressure regulator YT, input side and the outgoing side of this current lifting device ST all are parallel with capacitor C.
The device of the utility model utilizes the resonant tank method of shunt capacitance C or series capacitance C to carry out reactive-load compensation according to the characteristics of loop induction reactance much larger than resistance.In the loop, the three phase supply power supply connects pressure regulator YT, connects current lifting device ST by pressure regulator YT, and simultaneously in current lifting device ST input side shunt compensation capacitor C, the outgoing side of current lifting device ST connects tested current transformer TA through a lead after the shunt compensation capacitor C simultaneously.Pressure regulator YT provides current lifting device ST required voltage, and current lifting device ST provides whole primary circuit required electric current.
When the size adjustment of capacitor C amount reaches resonance, can make perception idle and the mutual balance of capacitive reactive power, and the capacitive reactance in loop is when offsetting with induction reactance, the impedance in whole loop is minimum, obtains the test current of maximum with the capacity of minimum.Thereby reduce capacity requirement greatly to power supply, pressure regulator YT and current lifting device ST.The advantage that is equipped with like this is that the capacity of pressure regulator YT and current lifting device ST need not be too big, little, the convenient transportation of single devices volume, and on-the-spot layout and wiring make the difficulty of site test reduce greatly also than being easier to.
Using 1 capacity is 0.02 grade standard current transformer as the pressure regulator YT of 100kVA and 1 accuracy; The parallel connection of current lifting device ST input side, outgoing side series connection are used; The capacitor C device is connected in current lifting device ST input side and outgoing side; Pressure regulator YT output voltage, electric current and power factor are observed by 1 external electric energy meter on-site calibrator, and pressure regulator YT input voltage, electric current are observed by pincerlike meter, multimeter.
Claims (1)
1. current transformer accuracy field-checking equipment; It is characterized in that: comprise a pressure regulator (YT); The input side joint three phase supply power supply of this pressure regulator (YT); The input side of output side joint one current lifting device (ST) of this pressure regulator (YT), input side of this current lifting device (ST) and outgoing side all are parallel with electric capacity (C).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204569865U CN202330692U (en) | 2011-11-17 | 2011-11-17 | Field check equipment for accuracy of current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204569865U CN202330692U (en) | 2011-11-17 | 2011-11-17 | Field check equipment for accuracy of current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202330692U true CN202330692U (en) | 2012-07-11 |
Family
ID=46442668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204569865U Expired - Fee Related CN202330692U (en) | 2011-11-17 | 2011-11-17 | Field check equipment for accuracy of current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202330692U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103336188A (en) * | 2013-05-30 | 2013-10-02 | 国家电网公司 | Current boosting apparatus suitable for GIS equipment |
| CN104155625A (en) * | 2014-07-31 | 2014-11-19 | 国家电网公司 | Auxiliary device for field calibration of high-transformation-ratio current transformer used in GIS |
| CN104730480A (en) * | 2013-12-19 | 2015-06-24 | 国家电网公司 | Calibration device and system of split core type current transformer |
| CN105425193A (en) * | 2016-01-12 | 2016-03-23 | 江苏省电力公司电力科学研究院 | Extra-high-voltage current transformer verification system |
| CN107765207A (en) * | 2017-10-09 | 2018-03-06 | 国网四川省电力公司达州供电公司 | It is a kind of it is portable can multichannel measurement transformer comprehensive tester and its method of testing |
| CN111289938A (en) * | 2020-03-12 | 2020-06-16 | 国网山东省电力公司电力科学研究院 | Current transformer error calibration equipment |
-
2011
- 2011-11-17 CN CN2011204569865U patent/CN202330692U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103336188A (en) * | 2013-05-30 | 2013-10-02 | 国家电网公司 | Current boosting apparatus suitable for GIS equipment |
| CN104730480A (en) * | 2013-12-19 | 2015-06-24 | 国家电网公司 | Calibration device and system of split core type current transformer |
| CN104730480B (en) * | 2013-12-19 | 2017-10-27 | 国家电网公司 | The calibration equipment and system of split core type current transformer |
| CN104155625A (en) * | 2014-07-31 | 2014-11-19 | 国家电网公司 | Auxiliary device for field calibration of high-transformation-ratio current transformer used in GIS |
| CN105425193A (en) * | 2016-01-12 | 2016-03-23 | 江苏省电力公司电力科学研究院 | Extra-high-voltage current transformer verification system |
| CN107765207A (en) * | 2017-10-09 | 2018-03-06 | 国网四川省电力公司达州供电公司 | It is a kind of it is portable can multichannel measurement transformer comprehensive tester and its method of testing |
| CN107765207B (en) * | 2017-10-09 | 2020-06-02 | 国网四川省电力公司达州供电公司 | Portable transformer comprehensive tester capable of realizing multipath measurement and testing method thereof |
| CN111289938A (en) * | 2020-03-12 | 2020-06-16 | 国网山东省电力公司电力科学研究院 | Current transformer error calibration equipment |
| CN111289938B (en) * | 2020-03-12 | 2022-02-08 | 国网山东省电力公司营销服务中心(计量中心) | Current transformer error calibration equipment |
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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: 20120711 Termination date: 20191117 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |