CN112216562A - Three-phase meter magnetic latching relay with manganin shunt - Google Patents
Three-phase meter magnetic latching relay with manganin shunt Download PDFInfo
- Publication number
- CN112216562A CN112216562A CN201911325723.8A CN201911325723A CN112216562A CN 112216562 A CN112216562 A CN 112216562A CN 201911325723 A CN201911325723 A CN 201911325723A CN 112216562 A CN112216562 A CN 112216562A
- Authority
- CN
- China
- Prior art keywords
- latching relay
- phase
- magnetic latching
- manganin shunt
- copper sheet
- 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.)
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H51/00—Electromagnetic relays
- H01H51/01—Relays in which the armature is maintained in one position by a permanent magnet and freed by energisation of a coil producing an opposing magnetic field
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/16—Magnetic circuit arrangements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/54—Contact arrangements
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The invention discloses a three-phase surface magnetic latching relay with a manganin shunt, which is characterized by comprising the following components: the three-phase magnetic latching relay, the external antimagnetic cover, the manganin shunt and the brass terminal. Compared with the prior art, the invention realizes the design scheme of integrating the three-phase magnetic latching relay and the manganin shunt, improves the anti-interference capability of the metering of the three-phase electric energy meter, and reduces the design difficulty and the cost of the metering circuit of the three-phase electric energy meter.
Description
Technical Field
The invention relates to the technical field of three-phase intelligent electric meters, in particular to a three-phase meter magnetic latching relay with a manganin shunt.
Background
The current measuring scheme of the intelligent electric energy meter mainly comprises a current transformer and a manganese copper shunt, and is generally integrated with a magnetic latching relay. The current transformer scheme is that the electromagnetic induction principle is utilized and once a side heavy current converts the undercurrent of secondary side into and measures, because the inside magnetic core and the winding that contain of mutual-inductor, this scheme receives the influence of constant magnetic field and direct current component relatively easily, still generally need increase antimagnetic design to the mutual-inductor, consequently does not have the advantage in volume and cost. The manganin shunt scheme is characterized in that manganin resistance partial pressure is utilized for metering, the design difficulty is mainly that the interference of a power frequency magnetic field is resisted, and the power frequency magnetic field can generate induced electromotive force in a current sampling loop, so that the metering precision is influenced.
Disclosure of Invention
The invention aims to provide a three-phase surface magnetic latching relay with a manganin shunt, which solves the problem that a metering scheme of a mutual inductor is easily influenced by a constant magnetic field and a direct current component on the premise of keeping low cost, and simultaneously solves the problem of power frequency magnetic field interference resistance of the manganin shunt.
The invention provides a three-phase surface magnetic latching relay with a manganin shunt, which is characterized by comprising the following components: the three-phase magnetic latching relay, the external antimagnetic cover, the manganin shunt and the brass terminal.
The three-phase magnetic latching relay includes: the drive control line and the state feedback line are connected with the three-phase meter PCB through a plastic shell terminal.
The manganin shunt comprises a manganin sheet, a copper sheet and a current sampling line, wherein the manganin sheet and the copper sheet are welded through an electron beam, the manganin sheet and the current sampling line are connected through resistance welding, and the twisted pair and the manganin sheet are symmetrically designed.
The brass terminal is connected with the manganin shunt through resistance welding.
The external antimagnetic cover is arranged on the bottom watchcase of the three-phase magnetic latching relay and covers the bottom, the left side and the right side of the relay body.
The current sampling line comprises: the thermal shrinkage sleeve wraps the roots of two ends of the twisted pair, and the twisted pair penetrates through a wiring groove in the relay body and is connected with a three-phase meter PCB through the plastic shell terminal.
The invention has the beneficial effects that:
the integrated design scheme of the three-phase magnetic latching relay and the manganin shunt is realized, the constant magnetic field and direct current component resistance of the three-phase electric energy meter is improved on the metering principle, the manganin sheet and the sampling line are symmetrically designed, the interference of power frequency magnetic fields generated in all directions of a manganin sheet sampling loop is counteracted, and the design difficulty and the cost of a metering circuit of a three-phase electric energy meter product are reduced.
Drawings
Fig. 1 is a front view of an embodiment of the present invention.
Fig. 2 is a top view of an embodiment of the present invention.
Fig. 3 is a left side view of an embodiment of the present invention.
Icon: 1-three-phase magnetic latching relay; 2-manganin shunt; 3-a brass terminal; 4-current sampling line; 5-plastic housing terminals; 6-drive control lines and status feedback lines.
Detailed Description
The technical scheme of the invention is clearly and completely described in the following with reference to the accompanying drawings.
As shown in fig. 1 to 3, the present embodiment provides a three-phase magnetic latching relay with a manganin shunt, including: three-phase magnetic latching relay 1, external antimagnetic cover, manganese copper shunt 2 and brass terminal 3.
The three-phase magnetic latching relay has three-phase load on-off capacity, and on-off control and state feedback are carried out through a driving control line and a state feedback line 6.
When the three-phase magnetic latching relay is in a closing conducting state, the manganin shunt provides a current sampling signal, and the metering of the electric energy meter is realized by connecting a current sampling line with a PCB metering chip. The manganin shunt comprises a manganin sheet, a copper sheet and a current sampling line, the manganin sheet and the copper sheet are welded through an electron beam, the manganin sheet and the current sampling line are connected through resistance welding, the current sampling line comprises a heat-shrinkable sleeve, a twisted pair and a plastic shell terminal, the heat-shrinkable sleeve is wrapped to the roots of two ends of the twisted pair to ensure that the twisted pair is uniformly formed, and the twisted pair penetrates through a wiring groove in the relay body and is connected with a three-phase meter PCB through the plastic shell terminal to ensure the consistency of installation wiring. The twisted-pair line and the manganin sheet are symmetrically designed, so that induced electromotive forces generated in all directions under the interference of a power frequency magnetic field can be mutually offset. The brass terminal is connected with the red copper sheet of the manganin shunt through resistance welding.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the technical features of the present invention in the specification and the drawings, or applied directly or indirectly to other related technical fields, are included in the scope of the present invention.
Claims (6)
1. The utility model provides a take three-phase table magnetism latching relay of manganin shunt which characterized in that includes: the three-phase magnetic latching relay, the external antimagnetic cover, the manganin shunt and the brass terminal.
2. The three-phase magnetic latching relay according to claim 1, characterized by comprising: the drive control line and the state feedback line are connected with the three-phase meter PCB through a plastic shell terminal.
3. The manganin shunt of claim 1, comprising: the device comprises a manganese copper sheet, a red copper sheet and a current sampling line, wherein the manganese copper sheet and the red copper sheet are welded through an electron beam, the manganese copper sheet and the current sampling line are connected through resistance welding, and the twisted pair and the manganese copper sheet are symmetrically designed.
4. The brass terminal of claim 1, wherein said manganin shunt is joined by resistance welding.
5. The external antimagnetic cover according to claim 1, characterized in that it is mounted on a bottom case of the three-phase magnetic latching relay, enclosing the bottom and left and right sides of the relay body.
6. The current sampling line according to claim 3, characterized by comprising: the thermal shrinkage sleeve wraps the roots of two ends of the twisted pair, and the twisted pair penetrates through a wiring groove in the relay body and is connected with a three-phase meter PCB through the plastic shell terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911325723.8A CN112216562A (en) | 2019-12-20 | 2019-12-20 | Three-phase meter magnetic latching relay with manganin shunt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911325723.8A CN112216562A (en) | 2019-12-20 | 2019-12-20 | Three-phase meter magnetic latching relay with manganin shunt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112216562A true CN112216562A (en) | 2021-01-12 |
Family
ID=74048039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911325723.8A Withdrawn CN112216562A (en) | 2019-12-20 | 2019-12-20 | Three-phase meter magnetic latching relay with manganin shunt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112216562A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101097232A (en) * | 2007-03-30 | 2008-01-02 | 桐乡市伟达电子有限公司 | Forming method of current divider |
| CN201117586Y (en) * | 2007-11-14 | 2008-09-17 | 永嘉县瑞乐电器有限公司 | Electrical energy meter relay |
| CN201490102U (en) * | 2009-04-17 | 2010-05-26 | 郁晓亮 | Three-phase electric energy meter load modular magnetic latching relay |
| US20120235667A1 (en) * | 2011-03-14 | 2012-09-20 | General Electric Company | Three-phase selectable energy meter |
| CN202870138U (en) * | 2012-09-14 | 2013-04-10 | 深圳市金正方科技有限公司 | Manganin shunt and electronic Watt-hour meter |
| CN203149002U (en) * | 2013-03-07 | 2013-08-21 | 广东中钰科技有限公司 | Manganese copper sheet data acquisition apparatus |
| CN208334445U (en) * | 2018-05-15 | 2019-01-04 | 华立科技股份有限公司 | Manganese copper diverter and electric energy meter assembly |
-
2019
- 2019-12-20 CN CN201911325723.8A patent/CN112216562A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101097232A (en) * | 2007-03-30 | 2008-01-02 | 桐乡市伟达电子有限公司 | Forming method of current divider |
| CN201117586Y (en) * | 2007-11-14 | 2008-09-17 | 永嘉县瑞乐电器有限公司 | Electrical energy meter relay |
| CN201490102U (en) * | 2009-04-17 | 2010-05-26 | 郁晓亮 | Three-phase electric energy meter load modular magnetic latching relay |
| US20120235667A1 (en) * | 2011-03-14 | 2012-09-20 | General Electric Company | Three-phase selectable energy meter |
| CN202870138U (en) * | 2012-09-14 | 2013-04-10 | 深圳市金正方科技有限公司 | Manganin shunt and electronic Watt-hour meter |
| CN203149002U (en) * | 2013-03-07 | 2013-08-21 | 广东中钰科技有限公司 | Manganese copper sheet data acquisition apparatus |
| CN208334445U (en) * | 2018-05-15 | 2019-01-04 | 华立科技股份有限公司 | Manganese copper diverter and electric energy meter assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210112 |
|
| WW01 | Invention patent application withdrawn after publication |