CN103513084A - Three-phase electric energy meter on-site calibration instrument detachable current transformer - Google Patents
Three-phase electric energy meter on-site calibration instrument detachable current transformer Download PDFInfo
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- CN103513084A CN103513084A CN201310446735.2A CN201310446735A CN103513084A CN 103513084 A CN103513084 A CN 103513084A CN 201310446735 A CN201310446735 A CN 201310446735A CN 103513084 A CN103513084 A CN 103513084A
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Abstract
The invention discloses a three-phase electric energy meter on-site calibration instrument detachable current transformer which is characterized in that a current transformer module which is externally arranged on a three-phase electric energy meter calibration instrument in a detachable mode is included; the current transformer module comprises three current transformers, primary winding ends of the three current transformers are respectively connected with a primary current connecting terminal, secondary winding ends of the three current transformers are connected to secondary connecting ports together, the secondary connecting ports and a current measuring connector on the calibration instrument are matched and electrically communicated. The current transformer module of the current transformer and a calibration instrument body are in an external-split mode, the current transformer can be combined with the calibration instrument for use or be disassembled from the calibration instrument according to needs, and the size of the electric energy meter on-site calibration instrument is reduced. Measuring accuracy and carrying and using convenience are achieved at the same time, and electric energy meter on-site calibration instrument miniaturization handheld operation is achieved. The current transformer can be widely used in the electric energy meter on-site calibration instrument.
Description
Technical field
The present invention relates to a kind of instrument high precision mutual inductor while directly testing for three-phase electric energy meter on-site calibrator electric current.For the external parts of three-phase electric energy meter on-site calibrator, install the test grade that these parts can effectively improve tester additional.
Background technology
At present domestic and international three-phase electric energy meter on-site calibrator, a set of split core type current transformer of exterior arrangement is measured indirectly, but measuring accuracy is low, can only test for inferior grade electric energy meter (1 grade or 2 grades).In order to test high-grade electric energy meter (0.5 grade or 0.2 grade), testing current loop must adopt high precision current transformer directly to measure.In instrument internal, high precision current transformer is installed, the general volume ratio of each high-precision current transformer is larger, causes that testing tool volume is large, Heavy Weight, carries and uses very inconvenient.Current on-the-spot inferior grade electric energy meter (1 grade or 2 grades) is installed many, generally uses split core type current transformer indirectly to measure situation relatively many, many times without direct-type current transformer during test.
Summary of the invention
Technical matters to be solved by this invention is the defect that overcomes prior art, and a kind of directly current transformer module of test of electric energy meter on-site calibrator that can be used in is provided, and has that volume is little, precision is high and detachable feature.Be convenient to use under on-the-spot different test case.
For solving the problems of the technologies described above, the invention provides the detachable current transformer of three-phase electric energy meter on-site calibrator, it is characterized in that, comprise a removably external current transformer module being installed on three-phase electric energy meter tester; In described current transformer module, comprise three current transformers, a winding terminal of three current transformers connects respectively one group of primary current connection terminal
,the Secondary Winding end of three current transformers is connected to secondary connection port altogether; The described secondary connection port electric connection that matches with current measuring interface on tester.
Current transformer module is located by connecting by buckle and tester.
Described primary connection port adopts the jack of diameter phi 4.
During on-the-spot use, electric current accesses current transformer by primary current connection terminal, then is connected with the current measuring interface of tester by secondary connection port, and the input of tester current return test signal is provided.
The beneficial effect that the present invention reaches:
Current transformer module of the present invention and tester main body adopt external split mode, can be used in combination with tester as required, or disassemble from check meter, reduce the volume of electric energy meter on-site calibrator.Taken into account measuring accuracy and carry, ease of use, realized the operation of electric energy meter on-site calibrator miniaturization, palm-type.The present invention can be widely used on electric energy meter on-site calibrator.
Accompanying drawing explanation
Fig. 1 is the detachable current transformer module of the present invention and tester wiring layout;
Fig. 2-Fig. 4 is the detachable current transformer module structural drawing of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.Following examples are only for technical scheme of the present invention is more clearly described, and can not limit the scope of the invention with this.
Current transformer module adopts integral design mode, and a current transformer module has three current transformers, and module, electric current tester main body adopt external split mode, and module can freely mount and dismount from tester.The overall volume size that can effectively reduce on-site calibrator, facilitates scene carry and use.
As shown in Figure 1, be detachable current transformer module 1 and on-site calibrator 2 wiring layouts, current transformer is as a whole.Current transformer module 1 is accurately located by connecting by buckle and tester 2 main bodys, harmonious with tester 2 outward appearances in appearance, keeps the overall appearance of instrument.
Split core type current transformer second interface surface structure size and the electric definition of in current transformer module 1 secondary connection port and prior art, testing electric energy meter use are in full accord, adopt same interface to be connected with tester 2, realize split core type current transformer interface and direct-type mutual inductor module interface unified and multiplexing.
As shown in Fig. 2-Fig. 4, for detachable current transformer module 1 structural drawing, at a plastic casing
74, three current transformers of three current transformers of interior integrated installation are tri-groups of independently A, B, C, adopt integral type encapsulation, can greatly reduce volume.Current transformer module 1 has primary current connection terminal 3 and secondary connection port 5.Primary current connection terminal 3 is three groups, is respectively A, B, C three-phase, each 1 terminal of every group of high and low end, three groups of totally 6 terminals.The Secondary Winding end that a winding terminal of three current transformers 4 connects respectively 3, three current transformers 4 of one group of primary current connection terminal is connected to secondary connection port 5 altogether.Primary connection port
3adopt the jack of diameter phi 4, in the time of can adapting to existing test, electric energy meter φ 4 plungers use.Secondary connection port 5 electric connection that matches with current measuring interface on tester 2
. current transformer module 1 and tester
2connection is provided with buckle 6 ordinatedly, and the mode by buckle 6 clampings realizes quick-detachment.
During on-the-spot use, electric current accesses current transformers 4 by primary current connection terminal 3, then is connected with the current measuring interface of on-site calibrator 2 by secondary connection port 5, and the input of tester 2 current return test signals is provided.
Tester 2 adopts existing three-phase electric energy meter on-site calibrator, or the inner structure structure identical with existing three-phase electric energy meter on-site calibrator, the interface clamping that matches with current transformer module 1, the test of realization to electric energy meter.
When inferior grade electric energy meter is tested at the scene, without grafting current transformer module 1, use tester 2 directly to measure; And when high-grade electric energy meter is measured, current transformer module 1 is connected on tester 2.Thereby reduced the volume and weight of check meter 2, carried and use more convenient.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the technology of the present invention principle; can also make some improvement and distortion, these improvement and distortion also should be considered as protection scope of the present invention.
Claims (4)
1. the detachable current transformer of three-phase electric energy meter on-site calibrator, is characterized in that, comprises a removably external current transformer module being installed on three-phase electric energy meter tester; In described current transformer module, comprise three current transformers, a winding terminal of three current transformers connects respectively one group of primary current connection terminal
,the Secondary Winding end of three current transformers is connected to secondary connection port altogether; The described secondary connection port electric connection that matches with current measuring interface on tester.
2. the detachable current transformer of three-phase electric energy meter on-site calibrator according to claim 1, is characterized in that, current transformer module is located by connecting by buckle and tester.
3. the detachable current transformer of three-phase electric energy meter on-site calibrator according to claim 1, is characterized in that, described primary connection port adopts the jack of diameter phi 4.
4. the detachable current transformer of three-phase electric energy meter on-site calibrator according to claim 1, it is characterized in that, during on-the-spot use, electric current is by primary current connection terminal access current transformer, by secondary connection port, be connected with the current measuring interface of tester again, the input of tester current return test signal is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310446735.2A CN103513084A (en) | 2013-09-25 | 2013-09-25 | Three-phase electric energy meter on-site calibration instrument detachable current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310446735.2A CN103513084A (en) | 2013-09-25 | 2013-09-25 | Three-phase electric energy meter on-site calibration instrument detachable current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103513084A true CN103513084A (en) | 2014-01-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310446735.2A Pending CN103513084A (en) | 2013-09-25 | 2013-09-25 | Three-phase electric energy meter on-site calibration instrument detachable current transformer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106197562A (en) * | 2016-08-31 | 2016-12-07 | 南京隆远电气技术有限公司 | Electric power observation and control device |
| CN106197561A (en) * | 2016-08-31 | 2016-12-07 | 南京隆远电气技术有限公司 | Electric power observation and control device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1085008A (en) * | 1992-09-29 | 1994-04-06 | 张俭 | Three-phase ac current transformer |
| CN2929927Y (en) * | 2006-05-10 | 2007-08-01 | 大连北方互感器有限公司 | Transformer integrated outdoor dry type totally-enclosed three-phase current transformer |
| CN200944349Y (en) * | 2006-08-16 | 2007-09-05 | 浙江天正电气股份有限公司 | Novel current mutual inductor |
| WO2012045885A1 (en) * | 2010-10-07 | 2012-04-12 | Phoenix Contact Gmbh & Co. Kg | Device for removably fixing a current conductor to a current transformer housing |
| CN203455387U (en) * | 2013-09-25 | 2014-02-26 | 国家电网公司 | Detachable current transformer of three-phase electric energy meter field calibrator |
-
2013
- 2013-09-25 CN CN201310446735.2A patent/CN103513084A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1085008A (en) * | 1992-09-29 | 1994-04-06 | 张俭 | Three-phase ac current transformer |
| CN2929927Y (en) * | 2006-05-10 | 2007-08-01 | 大连北方互感器有限公司 | Transformer integrated outdoor dry type totally-enclosed three-phase current transformer |
| CN200944349Y (en) * | 2006-08-16 | 2007-09-05 | 浙江天正电气股份有限公司 | Novel current mutual inductor |
| WO2012045885A1 (en) * | 2010-10-07 | 2012-04-12 | Phoenix Contact Gmbh & Co. Kg | Device for removably fixing a current conductor to a current transformer housing |
| CN203455387U (en) * | 2013-09-25 | 2014-02-26 | 国家电网公司 | Detachable current transformer of three-phase electric energy meter field calibrator |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106197562A (en) * | 2016-08-31 | 2016-12-07 | 南京隆远电气技术有限公司 | Electric power observation and control device |
| CN106197561A (en) * | 2016-08-31 | 2016-12-07 | 南京隆远电气技术有限公司 | Electric power observation and control device |
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Application publication date: 20140115 |