CN109696580A - A kind of current divider that can resist magnetic interference and its relay and electronic electric energy meter - Google Patents
A kind of current divider that can resist magnetic interference and its relay and electronic electric energy meter Download PDFInfo
- Publication number
- CN109696580A CN109696580A CN201811359519.3A CN201811359519A CN109696580A CN 109696580 A CN109696580 A CN 109696580A CN 201811359519 A CN201811359519 A CN 201811359519A CN 109696580 A CN109696580 A CN 109696580A
- Authority
- CN
- China
- Prior art keywords
- sampling
- foot
- pcb board
- electric connector
- current divider
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 32
- 238000005070 sampling Methods 0.000 claims abstract description 95
- 239000000463 material Substances 0.000 claims abstract description 8
- 230000002093 peripheral effect Effects 0.000 claims abstract description 6
- 238000005452 bending Methods 0.000 claims description 20
- 230000005611 electricity Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 6
- 230000002452 interceptive effect Effects 0.000 abstract description 3
- HPDFFVBPXCTEDN-UHFFFAOYSA-N copper manganese Chemical compound [Mn].[Cu] HPDFFVBPXCTEDN-UHFFFAOYSA-N 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 229910001006 Constantan Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005292 diamagnetic effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- SBNFWQZLDJGRLK-UHFFFAOYSA-N phenothrin Chemical compound CC1(C)C(C=C(C)C)C1C(=O)OCC1=CC=CC(OC=2C=CC=CC=2)=C1 SBNFWQZLDJGRLK-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
- G01R22/061—Details of electronic electricity meters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/18—Screening arrangements against electric or magnetic fields, e.g. against earth's field
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/20—Modifications of basic electric elements for use in electric measuring instruments; Structural combinations of such elements with such instruments
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/20—Modifications of basic electric elements for use in electric measuring instruments; Structural combinations of such elements with such instruments
- G01R1/203—Resistors used for electric measuring, e.g. decade resistors standards, resistors for comparators, series resistors, shunts
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The invention discloses a kind of current divider that can resist magnetic interference and its relays and electronic electric energy meter, the current divider includes one section of board-like sampling resistor piece being made using high resistivity material, and the both sides of the upper end of sampling resistor piece are respectively equipped with the first sampling foot and the second sampling foot protruding upward;Current divider further includes a pcb board, the plate face of the pcb board and the plate face of sampling resistor piece are substantially parallel, the electric connector of the wire shape of the peripheral extent corresponding to sampling resistor piece is printed in pcb board, the both ends of the electric connector of the wire shape of pcb board by after intersecting respectively with the first sampling foot, foot is corresponding is connected for the second sampling, to make the direction for interfering magnetic field induced electromotive force caused by pcb board and interfere the contrary of magnetic field induced electromotive force caused by sampling resistor piece.The present invention can either realize Automated assembly, and can guarantee jamproof effect and need not be finely adjusted again after assembly.
Description
Technical field
The present invention relates to electronic instrument technical field, more particularly to one kind can resist magnetic interference current divider and its after
Electric appliance and electronic electric energy meter.
Background technique
Electronic electric energy meter is a kind of electronic instrument equipment, it is by adopting to customer power supply voltage and current real-time sampling
With dedicated electric energy meter integrated circuit, sampled voltage and current signal are handled and be multiplied be converted into it is directly proportional to electric energy
Pulse output, then shown by register or digital display.The electronic electric energy meter of the prior art is usually to use copper-manganese etc.
High stability material makes current sample element, that is, copper-manganese splitter, and still, due to the interference by external magnetic field, copper-manganese is shunted
On piece has self inductance current to flow through, in this way, electric energy meter will be made current indication mistake occur, causes electric energy in the case of no any load
Table mistakenly measures electricity consumption.In order to solve the interference in magnetic field, a kind of scheme of the prior art is in copper-manganese splitter
Between through-hole is set, two signal sampling lines are respectively welded on the upper and lower sampling foot of copper-manganese splitter, and allow therein one
Root signal sampling line passes through the through-hole of the centre of copper-manganese splitter, and electronic type electricity is then connected to together with another signal sampling line
The circuit board of energy table achievees the effect that anti-0.5mT so as to realize preferable diamagnetic field interference effect.It can but this
Jamproof electronic electric energy meter, there is also following two drawbacks: first is that, because signal sampling cable architecture characteristic, cannot adopt
Use Automated assembly;Second is that because signal sampling line is too soft, signal sampling line welded with copper-manganese splitter after position and signal adopt
Molding shape is all variant after line-transect welding, causes anti-0.5mT there is also difference, and product has arrived the test of client dress table
A confirmation will be finely tuned when 0.5mT again and reaches state's net full marks requirement.
Summary of the invention
It is an object of the invention to overcome the deficiency of the prior art, provide a kind of current divider that can resist magnetic interference and its
Relay and electronic electric energy meter can either realize Automated assembly by the improvement to current divider anti-interference structure, and can
Guarantee jamproof effect and need not be finely adjusted again after assembly.
The technical solution adopted by the present invention to solve the technical problems is: one kind can resist the current divider of magnetic interference, packet
One section of board-like sampling resistor piece being made using high resistivity material is included, the both sides of the upper end of sampling resistor piece are respectively equipped with
First sampling foot and the second sampling foot protruding upward;The current divider further includes a pcb board, the plate face and sampling of the pcb board
The plate face of resistor disc is substantially parallel, and the electricity of the wire shape of the peripheral extent corresponding to sampling resistor piece is printed in pcb board
Connector, the both ends of the electric connector of the wire shape of pcb board are by sampling foot pair with the first sampling foot, second respectively after intersecting
It should be connected, to make the direction for interfering magnetic field induced electromotive force caused by pcb board and interference magnetic field in sampling resistor piece
Generated induced electromotive force it is contrary.
The bending foot for bending towards pcb board direction is respectively equipped in the first sampling foot and the second sampling foot;The pcb board and two
A bending foot is connected, and the both ends of the electric connector of the wire shape of the pcb board are curved with two respectively after intersecting in pcb board
Folding foot is connected.
It is set on the pcb board there are two being respectively intended to bend the first through hole that matches of foot grafting with two, two first
Electric connector is respectively equipped in through-hole to realize the corresponding electrical connection for bending foot with two;Wire shape in the pcb board
Electric connector is corresponding with the electric connector in two first through hole respectively after intersecting to be connected.
The electric connector of the wire shape of the pcb board includes the first electric connector of the one side for being in pcb board and is in
Second electric connector of the another side of pcb board, first electric connector substantially at U-shaped shape, first electric connector
One end to the oblique upper of the other end extend after and with the electric connector phase in one of first through hole in two first through hole
Connection is equipped with the second through-hole in the other end of the first electric connector, and is equipped in the second through-hole another with the first electric connector
Hold the electric connector that is connected, the oblique electric connector being connected in another first through hole of second electric connector and second
Between the electric connector of through-hole.
The first sampling foot and the second sampling foot respectively further comprise the lower connection for integrally connecting with sampling resistor piece
Foot and upper connecting pin for being connected with upper part.
The upper connecting pin and lower connecting pin are in be dislocatedly distributed.
The distance between upper connecting pin of the upper connecting pin of the first sampling foot and the second sampling foot is less than the first sampling
The distance between the lower connecting pin of the lower connecting pin of foot and the second sampling foot.
A kind of relay, two exits including being used to connect load, an exit connection is as described above wherein
Current divider.
A kind of electronic electric energy meter, the circuit board including electronic electric energy meter further include relay as described above, described
First sampling foot and the second sampling foot are connected with the circuit board of electronic electric energy meter respectively.
Compared with prior art, the beneficial effects of the present invention are:
The present invention is due to using one pcb board of setting, and the plate face of the pcb board and the plate face of sampling resistor piece are substantially flat
Row is additionally provided with the bending foot for bending towards pcb board direction in the first sampling foot and the second sampling foot;Pcb board and first is allowed to sample foot
It is connected with the bending foot of the second sampling foot, the conducting wire shape corresponding to the peripheral extent of sampling resistor piece is printed in pcb board
The electric connector of shape, the both ends of the electric connector of wire shape are connected with two bending feet respectively after intersecting, to make to interfere
Magnetic field induced electromotive force direction caused by pcb board and interference magnetic field induced electromotive force direction caused by sampling resistor piece
On the contrary.This structure of the invention can either realize Automated assembly, but can guarantee jamproof effect and need not be after assembly
It is finely adjusted again.
Invention is further described in detail with reference to the accompanying drawings and embodiments;But one kind of the invention can be anti-interference
Current divider and its relay and electronic electric energy meter be not limited to the embodiment.
Detailed description of the invention
Fig. 1 is the D structure schematic diagram of the part-structure of the embodiment of the present invention;
Fig. 2 is the D structure schematic diagram (one direction of rotation) of the part-structure of the embodiment of the present invention;
Fig. 3 is the main view of the part-structure of the embodiment of the present invention;
Fig. 4 is the side view of the part-structure of the embodiment of the present invention;
Fig. 5 be the current divider of the embodiment of the present invention sampling resistor piece with relay exit mutually to the D structure of conjunction
Schematic diagram;
Fig. 6 be the current divider of the embodiment of the present invention sampling resistor piece with relay exit mutually to the D structure of conjunction
Schematic diagram (one direction of rotation);
Fig. 7 be the current divider of the embodiment of the present invention sampling resistor piece with relay exit mutually to the main view of conjunction;
Fig. 8 be the current divider of the embodiment of the present invention sampling resistor piece with relay exit mutually to the side view of conjunction.
Specific embodiment
Embodiment
Referring to shown in Fig. 1 to Fig. 8, one kind of the invention can resist the current divider of magnetic interference, including one section uses high electricity
The board-like sampling resistor piece 2 that resistance rate material is made, the both sides of the upper end of sampling resistor piece 2 are respectively equipped with protruding upward
One sampling foot 21 and the second sampling foot 22;The current divider further includes a pcb board 3, the plate face and sampling resistor piece 2 of the pcb board 3
Plate face it is substantially parallel, the electric connector of the wire shape of the peripheral extent corresponding to sampling resistor piece is printed in pcb board 3
4, the both ends of the electric connector 4 of the wire shape of pcb board 3 are by sampling foot 22 with the first sampling foot 21, second respectively after intersecting
Correspondence is connected, to make the direction for interfering magnetic field induced electromotive force caused by pcb board 3 and interference magnetic field in sampling resistor
Induced electromotive force caused by piece 2 it is contrary.High resistivity material selected by the present embodiment is copper-manganese, certainly, high electricity
Resistance rate material can also be other kinds of material, such as constantan etc..
In the present embodiment, the first sampling foot 21 includes the lower connecting pin 212 for integrally connecting with sampling resistor piece 2
With the upper connecting pin 211 for being used to be connected with upper part, the second sampling foot 22 includes being used to integrally connect with sampling resistor piece 2
Lower connecting pin 222 and upper connecting pin 221 for being connected with upper part.
In the present embodiment, the upper connecting pin and lower connecting pin are in being dislocatedly distributed, i.e., upper connecting pin 211 and lower connecting pin
212 in being dislocatedly distributed, and upper connecting pin 221 and lower connecting pin 222 are in being dislocatedly distributed, in the first sampling foot 21 and the second sampling foot 22
In further respectively have the bending foot 213,223 for bending towards 3 direction of pcb board;The pcb board 3 is connected with two bending feet 213,223
Connect, the both ends of the electric connector 4 of the wire shape of the pcb board 3 intersect in pcb board 3 after respectively with two bending feet 213,
223 are connected.
In the present embodiment, it is described first sampling foot 21 upper connecting pin 211 with second sample foot 22 upper connecting pin 221 it
Between distance less than first sampling foot 21 lower connecting pin 212 with second sample foot 22 the distance between lower connecting pin 222.
In the present embodiment, set on the pcb board 3 there are two being respectively intended to match with two bending feet 213,223 grafting
First through hole 31, be respectively equipped with electric connector in two first through hole 31 to realize and bend the corresponding of foot 213,223 with two
Electrical connection;The electric connector 4 of wire shape in the pcb board 3 intersect after respectively with being electrically connected in two first through hole 22
Body correspondence is connected.
In the present embodiment, the electric connector 4 of the wire shape of the pcb board includes the first electricity for being in the one side of pcb board
Connector 41 and be in pcb board another side the second electric connector 42, first electric connector 41 substantially at U-shaped shape,
One end of first electric connector to the oblique upper of the other end extend after and in two first through hole one of them first
Electric connector in through-hole is connected, and is equipped with the second through-hole 32 in the other end of the first electric connector 41, and in the second through-hole 32
Equipped with the electric connector being connected with the other end of the first electric connector 41, second electric connector 42 is oblique be connected to it is another
Electric connector in a first through hole and between the electric connector of the second through-hole.
A kind of relay of the invention, the relay 6 include for connecting the two of load exits 61,62, wherein
Current divider as described above is connected in one exit 61.Particularly sampling resistor piece 2 is integrated in exit 61.
A kind of electronic electric energy meter of the invention, the circuit board (not shown) including electronic electric energy meter further include
Relay 6 as described above, the first sampling foot 21 and the second sampling foot 22 respectively with the circuit board phase of electronic electric energy meter
Connection.Particularly, the upper connecting pin that the circuit board of electronic electric energy meter samples foot 21 with first respectively as upper part
211, the upper connecting pin 221 of the second sampling foot 22 is connected.
One kind of the invention can resist the current divider and its relay and electronic electric energy meter of magnetic interference, can be by setting
The plate face area of 4 area encompassed of electric connector and sampling resistor piece 2 of setting wire shape matches, and makes that magnetic field is interfered to exist
Interference magnetic field induced electromotive force caused by sampling resistor piece 2 is offset in the complete conjunction of induced electromotive force caused by pcb board 3.
One kind of the invention can resist the current divider and its relay and electronic electric energy meter of magnetic interference, use setting
One pcb board 3, and the plate face of the pcb board 3 and the plate face of sampling resistor piece 2 are substantially parallel, in the first sampling foot 21 and the second sampling
The bending foot 213,223 for bending towards pcb board direction is additionally provided in foot 22;It allows pcb board 3 to sample foot and second with first and samples the curved of foot
Folding foot 213,223 is connected, and being electrically connected for the wire shape of the peripheral extent corresponding to sampling resistor piece is printed in pcb board 3
Junctor 4, the both ends of the electric connector 4 of wire shape are connected with two bending feet 213,223 respectively after intersecting, to make to interfere
Magnetic field induced electromotive force direction caused by pcb board and interference magnetic field induced electromotive force direction caused by sampling resistor piece
On the contrary.The present invention is due to using pcb board 3, in the first sampling foot 21 and the second sampling foot 22 of pcb board 3 and sampling resistor piece 2
Connection on can be convenient for Automated assembly, simultaneously as not using flexible circuit conductor, link position there is no difference, close by assembly
It need not finely tune again, can either realize Automated assembly, and can guarantee jamproof effect and need not be finely adjusted again after assembly.
Above-mentioned only presently preferred embodiments of the present invention, is not intended to limit the present invention in any form.Although of the invention
It has been disclosed in a preferred embodiment above, however, it is not intended to limit the invention.Anyone skilled in the art is not taking off
In the case where from technical solution of the present invention range, all technical solution of the present invention is made perhaps using the technology contents of the disclosure above
Mostly possible changes and modifications, or it is revised as equivalents equivalent embodiment.Therefore, all without departing from technical solution of the present invention
Content, technical spirit any simple modifications, equivalents, and modifications made to the above embodiment, should all fall according to the present invention
In the range of technical solution of the present invention protection.
Claims (9)
1. one kind can resist the current divider of magnetic interference, the board-like sampling electricity being made including one section using high resistivity material
Piece is hindered, the both sides of the upper end of sampling resistor piece are respectively equipped with the first sampling foot and the second sampling foot protruding upward;Its feature exists
In: the current divider further includes a pcb board, and the plate face of the pcb board and the plate face of sampling resistor piece are substantially parallel, in pcb board
It is printed with the electric connector of the wire shape of the peripheral extent corresponding to sampling resistor piece, the electrical connection of the wire shape of pcb board
The both ends of body by after intersecting respectively with the first sampling foot, foot is corresponding is connected for the second sampling, to make interference magnetic field in pcb board
The direction of generated induced electromotive force is contrary with interference magnetic field induced electromotive force caused by sampling resistor piece.
2. the current divider according to claim 1 that magnetic interference can be resisted, it is characterised in that: sample foot and second first
The bending foot for bending towards pcb board direction is respectively equipped in sampling foot;The pcb board is connected with two bending feet, the pcb board
The both ends of the electric connector of wire shape are connected with two bending feet respectively after intersecting in pcb board.
3. the current divider according to claim 2 that magnetic interference can be resisted, it is characterised in that: the pcb board is equipped with two
It is a to be respectively intended to bend the first through hole that foot grafting matches with two, electric connector is respectively equipped in two first through hole with reality
The corresponding electrical connection of foot is now bent with two;The electric connector of wire shape in the pcb board intersect after respectively with two the
Electric connector correspondence in one through-hole is connected.
4. the current divider according to claim 3 that magnetic interference can be resisted, it is characterised in that: the conducting wire shape of the pcb board
The electric connector of shape includes the first electric connector of the one side for being in pcb board and the second electrical connection of the another side for being in pcb board
Body, first electric connector is substantially at U-shaped shape, after one end of first electric connector extends to the oblique upper of the other end
And be connected with the electric connector in one of first through hole in two first through hole, in the other end of the first electric connector
Equipped with the second through-hole, and the electric connector being connected with the other end of the first electric connector is equipped in the second through-hole, described second
Between the oblique electric connector being connected in another first through hole of electric connector and the electric connector of the second through-hole.
5. the current divider according to claim 1 that magnetic interference can be resisted, it is characterised in that: the first sampling foot and the
Two sampling feet respectively further comprise lower connecting pin for integrally connecting with sampling resistor piece and for being connected with upper part
Upper connecting pin.
6. the current divider according to claim 5 that magnetic interference can be resisted, it is characterised in that: the upper connecting pin and lower company
Pin is in be dislocatedly distributed.
7. the current divider according to claim 6 that magnetic interference can be resisted, it is characterised in that: described first samples the upper of foot
The distance between upper connecting pin of connecting pin and the second sampling foot samples foot less than the lower connecting pin and second of the first sampling foot
The distance between lower connecting pin.
8. a kind of relay, two exits including being used to connect load, it is characterised in that: an exit connection wherein
Current divider as described in any claim in claim 1 to 7.
9. a kind of electronic electric energy meter, the circuit board including electronic electric energy meter, it is characterised in that: further include such as claim 1
To relay described in any claim in 8, it is described first sampling foot and second sampling foot respectively with electronic electric energy meter
Circuit board is connected.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201811359519.3A CN109696580A (en) | 2018-11-15 | 2018-11-15 | A kind of current divider that can resist magnetic interference and its relay and electronic electric energy meter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN201811359519.3A CN109696580A (en) | 2018-11-15 | 2018-11-15 | A kind of current divider that can resist magnetic interference and its relay and electronic electric energy meter |
Publications (1)
Publication Number | Publication Date |
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CN109696580A true CN109696580A (en) | 2019-04-30 |
Family
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CN201811359519.3A Pending CN109696580A (en) | 2018-11-15 | 2018-11-15 | A kind of current divider that can resist magnetic interference and its relay and electronic electric energy meter |
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CN (1) | CN109696580A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112730928A (en) * | 2020-11-30 | 2021-04-30 | 江阴长仪集团有限公司 | Intelligent electric energy meter with built-in power frequency magnetic field resisting relay and magnetic resisting method |
CN113866468A (en) * | 2021-09-01 | 2021-12-31 | 杭州西力智能科技股份有限公司 | Anti-interference shunt of hard joint and electric energy meter |
WO2023125625A1 (en) * | 2021-12-30 | 2023-07-06 | 厦门宏发电力电器有限公司 | Electromagnetic relay capable of performing measurement, and electronic electricity meter comprising same |
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CN101915861A (en) * | 2010-08-04 | 2010-12-15 | 威胜集团有限公司 | Relay and PCB assembly of electric energy meter |
CN201796059U (en) * | 2010-09-19 | 2011-04-13 | 威胜集团有限公司 | Manganin shunt and PCB board component of electric energy meter |
CN103630716A (en) * | 2013-11-26 | 2014-03-12 | 厦门宏发电力电器有限公司 | Antijamming shunt and electronic electric meter thereof |
CN205210141U (en) * | 2015-10-09 | 2016-05-04 | 厦门宏发电力电器有限公司 | Splitter vane , relay and electronic electric energy meter |
CN107271744A (en) * | 2017-07-03 | 2017-10-20 | 杭州海兴电力科技股份有限公司 | The Wiring structure of the pin configuration of manganese copper diverter, pcb board and pcb board |
CN108226631A (en) * | 2017-12-27 | 2018-06-29 | 南昌市科陆智能电网科技有限公司 | A kind of single-phase measurement module of anti-magnetic interference |
CN109557364A (en) * | 2018-11-30 | 2019-04-02 | 厦门宏发电力电器有限公司 | It is a kind of can anti-magnetic interference electronic electric energy meter |
CN209215481U (en) * | 2018-11-15 | 2019-08-06 | 厦门宏发电力电器有限公司 | The current divider and its relay and electronic electric energy meter of magnetic interference can be resisted |
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CN101915861A (en) * | 2010-08-04 | 2010-12-15 | 威胜集团有限公司 | Relay and PCB assembly of electric energy meter |
CN201796059U (en) * | 2010-09-19 | 2011-04-13 | 威胜集团有限公司 | Manganin shunt and PCB board component of electric energy meter |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN112730928A (en) * | 2020-11-30 | 2021-04-30 | 江阴长仪集团有限公司 | Intelligent electric energy meter with built-in power frequency magnetic field resisting relay and magnetic resisting method |
CN113866468A (en) * | 2021-09-01 | 2021-12-31 | 杭州西力智能科技股份有限公司 | Anti-interference shunt of hard joint and electric energy meter |
CN113866468B (en) * | 2021-09-01 | 2024-02-23 | 杭州西力智能科技股份有限公司 | Hard-connection anti-interference shunt and electric energy meter |
WO2023125625A1 (en) * | 2021-12-30 | 2023-07-06 | 厦门宏发电力电器有限公司 | Electromagnetic relay capable of performing measurement, and electronic electricity meter comprising same |
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