CN203551765U - Zero load on-site electric energy meter testing device - Google Patents
Zero load on-site electric energy meter testing device Download PDFInfo
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- CN203551765U CN203551765U CN201320603256.2U CN201320603256U CN203551765U CN 203551765 U CN203551765 U CN 203551765U CN 201320603256 U CN201320603256 U CN 201320603256U CN 203551765 U CN203551765 U CN 203551765U
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Abstract
The utility model discloses a zero load on-site electric energy meter testing device comprising an electric energy meter and an electric energy meter secondary wiring current circuit. In the electric energy meter secondary wiring current circuit, electric energy meter binding posts are connected with current transformer secondary windings by leads. The zero load on-site electric energy meter testing device is characterized in that a current compensation device is serially connected between one end of each of the current transformer secondary windings and the corresponding electric energy meter binding post, and the current compensation device comprises a multi-turn coil, two ends of which are serially connected between the corresponding current transformer secondary winding and the corresponding electric energy meter binding post. The zero load on-site electric energy meter testing device is advantageous in that the wiring inspection and the wiring determination can be carried out under the zero-load condition, and the testing task can be accomplished.
Description
Technical field
The utility model relates to a kind of device for the on-the-spot three-phase intelligent electric-energy meter wiring check of electric power meter and power test.Coordinate three-phase electric energy meter on-site calibrator, solve inspection and the power test of connection box of electric energy meter situation under the little current conditions of on-the-spot zero load, belong to power test technical field.
Background technology
At present owing to being subject to the restriction of existing electric energy meter on-site calibrator electric energy meter current test specification, the wiring check of electric power meter electric energy meter must carry out in load (having electric current) situation having.If but in zero load (no current) situation, need too to carry out wiring check and judgement, find in time the wiring mistake that electric power meter may exist, the economic loss of avoiding electric power to manage.
Utility model content
Technical problem to be solved in the utility model is to provide the device that one can be carried out connection box of electric energy meter inspection and judgement in electric power meter zero load (no current) situation.
For solving the problems of the technologies described above, the utility model provides a kind of zero load field electric energy table proving installation, comprise electric energy meter and electric energy meter secondary connection current return, in electric energy meter secondary connection current return, connection box of electric energy meter post is connected with the Secondary Winding of current transformer by wire, it is characterized in that: between wherein one end of each secondary winding in current transformer and connection box of electric energy meter post, be connected in series a current-amplifying device, described current-amplifying device comprises a multiturn coil, the two ends of multiturn coil are connected in series secondary winding in current transformer and can show between binding post.
Aforesaid zero load field electric energy table proving installation, it is characterized in that: described current-amplifying device comprises detecting uses split core type current transformer clamp area and Wiring area, described Wiring area comprises a low end interface and at least one high end interface, between low end interface and each high end interface, by plunger, is connected.
Aforesaid zero load field electric energy table proving installation, is characterized in that: described current-amplifying device is arranged in combined connection box.
Principle of work of the present utility model is:
Electric energy meter on-site calibrator current sample generally adopts split core type current transformer mode, and field wiring is convenient and swift.The principle of work of clamp on amperemeter is based upon on operation of current transformers principle basis, and when holding clamp on amperemeter spanner with a firm grip, the iron core of current transformer can open, and the wire of tested electric current enters the winding of jaw inside as current transformer.When loosening after spanner closure unshakable in one's determination, according to the principle of mutual inductor, in its Secondary Winding, produce induction current.Device of the present utility model adopts operation of current transformers principle mode to amplify the electric current of electric power meter current return, meets the test request of electric energy meter on-site calibrator.
According to operation of current transformers principle (I2=(N1/N2) * I1), analyze and research, when power transmission is zero load, no-load current (I1) in the time of can utilizing power circuit charging, in secondary current loop, be connected in series a toroid winding that has the N number of turn, the exciting current of the capacitance current of power transmission sequence or transformer is amplified to N doubly, reach the requirement of electric energy meter on-site calibrator work, complete wiring check and judgement under measuring apparatus zero load, realize the first inspection immediately of power transmission scene.Test again when not needing by the time to have actual load like this.
The beneficial effect that the utility model reaches: device of the present utility model coordinates with electric energy meter on-site calibrator, without load, only need this kind of device of configuration, can in zero load situation, carry out wiring check and judgement, complete test assignment, thereby find in time the wiring mistake that electric power meter may exist, the economic loss of avoiding electric power to manage.The utilization factor that simultaneously effectively improves existing equipment, reduces production cost.The utility model can be widely used in electric power meter Site Detection.
Accompanying drawing explanation
Fig. 1 is the current coil schematic diagram around the home of present clamp on amperemeter;
Fig. 2 is the current coil schematic diagram around the home of the utility model clamp on amperemeter;
Fig. 3 is the utility model current-amplifying device schematic diagram;
Fig. 4 is current-amplifying device external form figure of the present utility model;
Fig. 5 is zero load field electric energy table proving installation structural representation of the present utility model.
Embodiment
As shown in Figure 1, the critical piece of clamp on amperemeter is a straight-through current transformer, when measuring, the magnet of clamp on amperemeter 2 is enclosed within on tested wire, forms the primary winding 3 of a circle, utilize electromagnetic induction principle, in the secondary coil 1 of clamp on amperemeter, just can produce induction current.
If increase the primary current number of turns, thereby can change the turn ratio of forcipated mutual-inductor, the output that can improve secondary current in the situation that primary current is equal.As shown in Figure 2, the opening magnet 2 of split-core type meter is clipped in a multiply toroid winding 4, changes one time the number of turn, can improve secondary current output amplitude, meet sampling and the test of on-site calibrator electric current.
According to this principle, in electric power meter current return, be connected in series a current coil device with N circle, the clamp of the split core type current transformer of on-site calibrator is clipped on the coil of device.The ampere turns of split core type current transformer primary current is extended N times.Be equivalent to electric power meter current return current value and expanded N doubly, the electric current of input on-site calibrator expands N doubly thereupon.
Fig. 3 is the utility model current-amplifying device schematic diagram.In electric energy meter secondary circuit loop, series connection access electric current is mended multiplying arrangement, comprise a low end interface and at least one high end interface, between low end interface and each high end interface, by plunger, be connected, adopt tapped coil technology around the home, three high-end connection terminals are provided in the present embodiment.High low side can be serially connected in electric power meter current return, and high-end three the alternative enlargement factors (two times, five times and ten times) that are divided into, select corresponding enlargement factor according to on-the-spot current conditions, connects corresponding connection terminal serial connection.
Fig. 4 is current-amplifying device external form figure of the present utility model.Be divided into split core type current transformer clamp area and Wiring area, the split core type current transformer that clamp area can meet all size jaw picks up.Wiring area has three groups, is respectively 1000%, 500% and 200% connection terminal interface, passes through φ 4 plunger connecting lines during use in electric energy meter secondary current loop.
Fig. 5 zero load field electric energy of the present utility model table proving installation structural representation, in electric energy meter secondary connection current return, connection box of electric energy meter post is connected with the Secondary Winding 7 of current transformer by wire, during detection, by connecting line, current-amplifying device 8 is arranged in combined connection box 6, in current-amplifying device access electric power meter current return, then open combined connection box 6 electric current braces, allow electric current flow through this current-amplifying device 8, during test, the clamp of the split core type current transformer of on-site calibrator is clipped on the clamp area of this current-amplifying device 8.
Claims (3)
1. a zero load field electric energy table proving installation, comprise electric energy meter and electric energy meter secondary connection current return, in electric energy meter secondary connection current return, connection box of electric energy meter post is connected with the Secondary Winding of current transformer by wire, it is characterized in that: between wherein one end of each secondary winding in current transformer and connection box of electric energy meter post, be connected in series a current-amplifying device, described current-amplifying device comprises a multiturn coil, and the two ends of multiturn coil are connected in series secondary winding in current transformer and can show between binding post.
2. zero load field electric energy table proving installation according to claim 1, it is characterized in that: described current-amplifying device comprises detecting uses split core type current transformer clamp area and Wiring area, described Wiring area comprises a low end interface and at least one high end interface, between low end interface and each high end interface, by plunger, is connected.
3. zero load field electric energy table proving installation according to claim 2, is characterized in that: described current-amplifying device is arranged in combined connection box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320603256.2U CN203551765U (en) | 2013-09-25 | 2013-09-25 | Zero load on-site electric energy meter testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320603256.2U CN203551765U (en) | 2013-09-25 | 2013-09-25 | Zero load on-site electric energy meter testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203551765U true CN203551765U (en) | 2014-04-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320603256.2U Expired - Lifetime CN203551765U (en) | 2013-09-25 | 2013-09-25 | Zero load on-site electric energy meter testing device |
Country Status (1)
| Country | Link |
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| CN (1) | CN203551765U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103983825A (en) * | 2014-05-19 | 2014-08-13 | 国家电网公司 | Meter frame wiring rod head used for electric energy meter testing |
| CN108107313A (en) * | 2018-01-30 | 2018-06-01 | 国网河南省电力公司平顶山供电公司 | The method that unloaded situation judges connection box of electric energy meter correctness |
| CN109375129A (en) * | 2018-10-22 | 2019-02-22 | 国网重庆市电力公司电力科学研究院 | A kind of site environment analogy method and its tester based on voltage and current decoupling |
| CN113341363A (en) * | 2021-05-10 | 2021-09-03 | 国网浙江省电力有限公司金华供电公司 | Mutual inductor turn number conversion device |
-
2013
- 2013-09-25 CN CN201320603256.2U patent/CN203551765U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103983825A (en) * | 2014-05-19 | 2014-08-13 | 国家电网公司 | Meter frame wiring rod head used for electric energy meter testing |
| CN108107313A (en) * | 2018-01-30 | 2018-06-01 | 国网河南省电力公司平顶山供电公司 | The method that unloaded situation judges connection box of electric energy meter correctness |
| CN109375129A (en) * | 2018-10-22 | 2019-02-22 | 国网重庆市电力公司电力科学研究院 | A kind of site environment analogy method and its tester based on voltage and current decoupling |
| CN113341363A (en) * | 2021-05-10 | 2021-09-03 | 国网浙江省电力有限公司金华供电公司 | Mutual inductor turn number conversion device |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140416 |
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| CX01 | Expiry of patent term |