CN112083208A - Mutual inductor type three-phase electric energy meter capable of preventing electricity stealing by short-circuit current - Google Patents
Mutual inductor type three-phase electric energy meter capable of preventing electricity stealing by short-circuit current Download PDFInfo
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- CN112083208A CN112083208A CN202011006404.3A CN202011006404A CN112083208A CN 112083208 A CN112083208 A CN 112083208A CN 202011006404 A CN202011006404 A CN 202011006404A CN 112083208 A CN112083208 A CN 112083208A
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- 230000005611 electricity Effects 0.000 title claims abstract description 24
- 230000007935 neutral effect Effects 0.000 claims abstract description 16
- 239000004020 conductor Substances 0.000 claims description 4
- 238000013461 design Methods 0.000 description 6
- 238000004804 winding Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012827 research and development Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 238000006467 substitution reaction Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/02—Constructional details
- G01R11/04—Housings; Supporting racks; Arrangements of terminals
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/02—Constructional details
- G01R11/24—Arrangements for avoiding or indicating fraudulent use
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Abstract
The invention discloses a transformer-passing three-phase electric energy meter capable of preventing electricity stealing due to short-circuit current, which belongs to the technical field of transformer-passing three-phase electric energy meters and comprises a meter body, wherein a voltage terminal, a neutral wire terminal and a current terminal are arranged on the meter body; the right side of the connecting box is provided with a current terminal which is in a clamp shape. The invention is specially designed for preventing electricity stealing by short-circuit current, and the scheme creatively redesigns the meter tail terminal of the mutual inductor type three-phase electric energy meter, so that the current lead is prevented from being short-circuited by other thin leads due to a gap between the edge of the current lead and the terminal hole, a current loop does not pass through a combined junction box any more, the short circuit of a current connecting piece of the combined junction box is avoided, and the purpose of preventing electricity stealing is achieved.
Description
Technical Field
The invention relates to the technical field of mutual inductor type three-phase electric energy meters, in particular to a mutual inductor type three-phase electric energy meter capable of preventing electricity stealing due to short-circuit current.
Background
The existing mutual inductor type three-phase electric energy meter measures the voltage and current values through voltage and current sampling elements, and reflects the product of average power and time in a certain period of time by means of a data processing unit, so that the electric energy consumed by a load in a certain period of time is measured.
At present, a meter tail terminal of a mutual inductor type three-phase electric energy meter generally adopts a terminal hole plugging mode, after a voltage wire and an electric current wire are peeled for a proper length, the voltage wire and the electric current wire are inserted into a meter tail terminal hole and are screwed by an embedded double screw, but because the wire diameter of the wire is smaller than the aperture, a gap exists between the electric current wire and the edge of the terminal hole, and the electric current wire and the edge of the terminal hole are easily short-circuited by other thin wires, so that the current value measured by a current sampling element of the electric energy meter is smaller, even is 0 value, the electric energy meter counts less; secondly, as the current loop passing through the mutual inductor type three-phase electric energy meter needs to pass through the joint junction box, the current connecting piece of the joint junction box is in short circuit, and electricity can be stolen.
In conclusion, the existing mutual inductor type three-phase electric energy meter has the potential danger of electricity stealing and causes electric energy loss.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a transformer-passing three-phase electric energy meter capable of preventing electricity stealing due to short-circuit current; this can prevent that short circuit current steals electricity through mutual-inductor formula three-phase electric energy meter is special for preventing that short circuit current steals electricity and designs and form, and the creative redesign of this scheme avoids current wire and terminal hole edge to have the gap through the meter tail terminal of mutual-inductor formula three-phase electric energy meter, is short circuited by other thin wires, and current loop no longer through joint terminal box, avoids joint terminal box current even piece short circuit, reaches the purpose of preventing electricity theft.
In order to solve the technical problems, the invention provides a mutual inductor type three-phase electric energy meter capable of preventing electricity stealing by short-circuit current, which comprises a meter body, wherein a voltage terminal, a neutral wire terminal and a current terminal are arranged on the meter body; the right side of the connecting box is provided with a current terminal which is in a clamp shape.
In a further improvement of the present invention, the current terminal is of a movable clamp type structure.
Through the above design, this scheme can be more convenient for be connected of current terminal and wire, and above-mentioned movable clamp formula structure borrows from the movable clamp formula structure of tong-type ampere meter, during the use, as long as press the spanner, just can open current terminal pincerlike mouth to put the wire into in the pincerlike mouth.
In a further improvement of the invention, the current terminal is connected with a feedthrough current transformer, and the feedthrough current transformer is positioned on the inner side of the watch body.
The bus type current transformer is a low-voltage indoor bus type cast insulation and plastic shell insulation current transformer, commonly called a straight-through current transformer; the bus current transformer is widely applied to measurement, electric energy metering and relay protection loops of low-voltage systems. The current-carrying conductor can be directly used as a primary winding through the window hole, and the number of winding turns (turns) of the primary winding can be changed according to requirements so as to adapt to loops with different rated currents, so that the current-carrying winding device is flexible and convenient to use, and is widely applied due to simple structure, small size and low price.
By using the prior art, the scheme can better reduce research and development cost and use productization as soon as possible.
In a further improvement of the present invention, the current line of the current terminal is a primary coil.
By using the prior art, the scheme can better reduce research and development cost and use productization as soon as possible.
In a further improvement of the present invention, the current terminal includes a phase a, a phase B, and a phase C.
Through the design, this scheme is three-phase four-wire electric energy meter.
In a further development of the invention, the current terminal comprises an a-phase and a C-phase.
Through the design, the scheme is a three-phase three-wire electric energy meter, and the neutral line terminal and the phase B current position of the three-phase three-wire electric energy meter are left empty.
In a further improvement of the present invention, the voltage terminal includes a phase a, a phase B, and a phase C; and the phase A, the phase B, the phase C and the neutral line terminal of the voltage terminal are sequentially arranged in the connecting box from left to right.
Through the above-mentioned design with voltage terminal and neutral line terminal are concentrated, this scheme can more convenient to use.
In a further improvement of the invention, the voltage terminal and the neutral terminal both adopt terminal hole plugging structures.
By using the prior art, the scheme can better reduce research and development cost and use productization as soon as possible.
Compared with the prior art, the invention has the following beneficial effects:
the invention is specially designed for preventing electricity stealing by short-circuit current, the scheme creatively redesigns a meter tail terminal of a mutual inductor type three-phase electric energy meter, designs a current terminal into a clamp shape, avoids the existence of a terminal hole, namely avoids the possibility that a current lead and the edge of the terminal hole are short-circuited by other thin leads, a current loop does not need to pass through a combined junction box any more, also avoids the current connecting piece of the combined junction box from being short-circuited, achieves the aim of electricity stealing prevention, and avoids electric energy loss.
Drawings
To more clearly illustrate the background art or the technical solutions of the present invention, the following brief description of the drawings incorporated in the prior art or the detailed description of the present invention; it should be understood that the structures, proportions, and dimensions shown in the drawings and described herein are for illustrative purposes only and are not intended to limit the scope of the present invention, which is to be given the full breadth of the present disclosure, and are not intended to limit the scope of the present disclosure.
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
Fig. 2 is a schematic view of an open state in embodiment 1 of the present invention.
Fig. 3 is a schematic structural diagram of embodiment 2 of the present invention.
FIG. 4 is a schematic wiring diagram of the present invention.
Shown in the figure: 1-watch body; 2-a junction box; 3-a voltage terminal; 4-neutral terminal; 5-a current terminal; 6-spanner.
Detailed Description
In order to make the technical solution of the present invention better understood, the following description is provided with reference to the accompanying drawings, the technical solutions in the embodiments of the present invention are clearly and completely described, and obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments, which are consistent with the present invention, all other embodiments that may be devised by those skilled in the art without departing from the scope and spirit of the invention, meanwhile, the terms such as "upper", "lower", "front", "rear" and "middle" used in the present specification are for clarity of description only and are not intended to limit the scope of the present invention, changes and modifications in the relative relationship to each other without substantial technical change should also be considered as the scope of the present invention.
Example 1
As shown in fig. 1 and 2, a mutual inductor type three-phase electric energy meter capable of preventing electricity stealing by short-circuit current comprises a meter body 1, wherein a voltage terminal 3, a neutral terminal 4 and a current terminal 5 are arranged on the meter body 1, a connecting box 2 is arranged at the bottom of the meter body, and the voltage terminal 3 and the neutral terminal 4 are arranged in the connecting box 2; the right side of the connecting box 2 is provided with a current terminal 5, and the current terminal 5 is in a clamp shape.
The current terminal 5 adopts a movable clamp type structure; the current terminal 5 is connected with a straight-through current transformer which is positioned on the inner side of the meter body 1; the current line of the current terminal 5 is a primary coil.
The current terminal 5 includes a phase a, a phase B, and a phase C.
The voltage terminal 3 includes a phase a, a phase B, and a phase C; the phase A, the phase B, the phase C and the neutral line terminal 4 of the voltage terminal 3 are sequentially arranged in the connecting box from left to right.
The voltage terminal 3 and the neutral line terminal 4 both adopt terminal hole plugging structures.
Example 2
The embodiment is the most different from the above embodiment in that the above embodiment is a three-phase four-wire electric energy meter, and the present embodiment is a three-phase three-wire electric energy meter, as shown in fig. 3, the current terminal 5 includes an a phase and a C phase, and the neutral terminal and the phase B current position of the three-phase three-wire electric energy meter are left empty.
The current sampling element of the electric energy meter adopts a straight-through current transformer, the current wire of a straight-through pincer-shaped terminal is a primary coil, the current wire passing through the transformer type three-phase electric energy meter enters and exits the terminal, a terminal hole plug-in structure is designed into a pincer-shaped terminal structure, the current wire is not required to be peeled and then is connected during meter installation, the straight-through pincer-shaped terminal can be directly inserted (as shown in figure 4), and the phenomenon that the wire diameter of a current wire is smaller than the aperture of the terminal, a gap is formed between the wire and the edge of the terminal hole, so that the purpose of preventing short-circuit current from stealing; the improved electric energy meter can simplify the meter installation process and improve the working efficiency; the position of a current terminal of the combined junction box can be saved, the appearance type of the combined junction box is simplified, materials are saved, the space of a metering box (cabinet or screen) is saved, and the problem of current short circuit or secondary side open circuit of a current transformer caused by the position error of a current connecting piece of the combined junction box is fundamentally avoided.
The tail terminal of the electric energy meter is different from the split-phase arrangement and arrangement of the existing mutual inductor type three-phase electric energy meter, but the three-phase voltage terminal and the neutral line terminal are arranged in a centralized way, and the current terminal is arranged in a centralized way.
When this electric energy meter dress table, the voltage line inserts as current situation, and the wire is skinned after appropriate length, inserts table tail voltage terminal hole to adopt embedded two screws to screw.
When the current line is connected, if at least one end of the current loop conductor of a newly-installed electric energy meter is not fixed, the conductor can directly pass through the pincer-shaped current terminal, and the structure shown in figure 1 is adopted; if both ends of the current loop lead are fixed or the electric energy meter is rotated, the wrench 6 is pressed to open the clamp-shaped current terminal, as shown in fig. 2, the current loop lead is clamped in, then the wrench 6 is loosened to close the clamp-shaped current terminal, as shown in fig. 1, so that the current line is connected.
Although the present invention has been described in detail by referring to the drawings in connection with the preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and these modifications or substitutions are within the scope of the present invention/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. The utility model provides a can prevent that short circuit current steals electricity through mutual-inductor formula three-phase electric energy meter, includes the table body, be provided with voltage terminal, neutral conductor terminal and current terminal on the table body, its characterized in that: the bottom of the watch body is provided with a connecting box, and a voltage terminal and a neutral wire terminal are arranged in the connecting box; the right side of the connecting box is provided with a current terminal which is in a clamp shape.
2. The mutual inductor type three-phase electric energy meter capable of preventing electricity stealing by short-circuit current according to claim 1, characterized in that: the current terminal adopts a movable clamp type structure.
3. The transformer-based three-phase electric energy meter capable of preventing electricity stealing due to short-circuit current according to claim 2, characterized in that: the current terminal is connected with a straight-through current transformer, and the straight-through current transformer is positioned on the inner side of the meter body.
4. The transformer-based three-phase electric energy meter capable of preventing electricity stealing due to short-circuit current according to claim 3, characterized in that: the current line of the current terminal is a primary coil.
5. The mutual inductor type three-phase electric energy meter capable of preventing electricity stealing by short-circuit current according to claim 1, characterized in that: the current terminal includes an A phase, a B phase, and a C phase.
6. The mutual inductor type three-phase electric energy meter capable of preventing electricity stealing by short-circuit current according to claim 1, characterized in that: the current terminal includes an A phase and a C phase.
7. The mutual inductor type three-phase electric energy meter capable of preventing electricity stealing by short-circuit current according to claim 1, characterized in that: the voltage terminal comprises an A phase, a B phase and a C phase; and the phase A, the phase B, the phase C and the neutral line terminal of the voltage terminal are sequentially arranged in the connecting box from left to right.
8. The mutual inductor type three-phase electric energy meter capable of preventing electricity stealing by short-circuit current according to claim 1, characterized in that: and the voltage terminal and the neutral line terminal are in terminal hole plugging structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011006404.3A CN112083208A (en) | 2020-09-23 | 2020-09-23 | Mutual inductor type three-phase electric energy meter capable of preventing electricity stealing by short-circuit current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011006404.3A CN112083208A (en) | 2020-09-23 | 2020-09-23 | Mutual inductor type three-phase electric energy meter capable of preventing electricity stealing by short-circuit current |
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| Publication Number | Publication Date |
|---|---|
| CN112083208A true CN112083208A (en) | 2020-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011006404.3A Pending CN112083208A (en) | 2020-09-23 | 2020-09-23 | Mutual inductor type three-phase electric energy meter capable of preventing electricity stealing by short-circuit current |
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| Country | Link |
|---|---|
| CN (1) | CN112083208A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201063044Y (en) * | 2007-05-22 | 2008-05-21 | 苏州工业园区和顺电气有限公司 | Direct type three-phase four-wire electric energy meter |
| JP2011180104A (en) * | 2010-03-04 | 2011-09-15 | Osaki Electric Co Ltd | Installation terminal for clamp-type instruments |
| CN202535161U (en) * | 2012-03-28 | 2012-11-14 | 北京水木源华电气有限公司 | Intelligent high-voltage distribution switch with anti-power stealing high-voltage measurement |
| CN203552925U (en) * | 2013-10-31 | 2014-04-16 | 浙江华建电气有限公司 | Electricity larceny prevention transformer |
| CN203551657U (en) * | 2013-11-05 | 2014-04-16 | 国家电网公司 | Electric energy meter with built-in transformers |
| CN204945364U (en) * | 2015-09-08 | 2016-01-06 | 国网山东高密市供电公司 | Intelligent electric energy meter connection terminal supervising device |
| CN205280785U (en) * | 2015-12-31 | 2016-06-01 | 温州万星电气有限公司 | Crimping formula electric energy meter terminal box |
| CN210323153U (en) * | 2019-05-09 | 2020-04-14 | 广东电网有限责任公司 | Take device of three-phase four-wire electric energy measurement |
-
2020
- 2020-09-23 CN CN202011006404.3A patent/CN112083208A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201063044Y (en) * | 2007-05-22 | 2008-05-21 | 苏州工业园区和顺电气有限公司 | Direct type three-phase four-wire electric energy meter |
| JP2011180104A (en) * | 2010-03-04 | 2011-09-15 | Osaki Electric Co Ltd | Installation terminal for clamp-type instruments |
| CN202535161U (en) * | 2012-03-28 | 2012-11-14 | 北京水木源华电气有限公司 | Intelligent high-voltage distribution switch with anti-power stealing high-voltage measurement |
| CN203552925U (en) * | 2013-10-31 | 2014-04-16 | 浙江华建电气有限公司 | Electricity larceny prevention transformer |
| CN203551657U (en) * | 2013-11-05 | 2014-04-16 | 国家电网公司 | Electric energy meter with built-in transformers |
| CN204945364U (en) * | 2015-09-08 | 2016-01-06 | 国网山东高密市供电公司 | Intelligent electric energy meter connection terminal supervising device |
| CN205280785U (en) * | 2015-12-31 | 2016-06-01 | 温州万星电气有限公司 | Crimping formula electric energy meter terminal box |
| CN210323153U (en) * | 2019-05-09 | 2020-04-14 | 广东电网有限责任公司 | Take device of three-phase four-wire electric energy measurement |
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Application publication date: 20201215 |