CN203325611U - Sampling resistor - Google Patents
Sampling resistor Download PDFInfo
- Publication number
- CN203325611U CN203325611U CN2013202839106U CN201320283910U CN203325611U CN 203325611 U CN203325611 U CN 203325611U CN 2013202839106 U CN2013202839106 U CN 2013202839106U CN 201320283910 U CN201320283910 U CN 201320283910U CN 203325611 U CN203325611 U CN 203325611U
- Authority
- CN
- China
- Prior art keywords
- sampling resistor
- sampling
- magnetic
- line
- relay
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The utility model discloses a sampling resistor. The sampling resistor comprises a U-shaped sampling resistor body, wherein a sampling point protrudes in equal-height positions of two side edges of the same side of the sampling resistor body respectively, and a datum point protrudes in the position near the sampling point on one side edge in the same direction as the sampling point; the sampling resistor body is formed by integrally fixing two pure copper sheets and a manganese-copper alloy sheet; the sampling points are connected with a sampling line; a heat shrinkable tube is sleeved outside the sampling line. The sampling resistor has the advantages that when a magnetic line of force passes through the sampling resistor, the induced currents generated in two conductors are opposite and have equal amplitude, thus the induced currents can offset each other and the problem of interference of alternating magnetic fields is well solved; as the shell of a relay is made by stretching high-permeability electrical pure iron and the surface of the relay is subjected to insulating paint baking, the sampling resistor can effectively shield the magnetic line of force when sleeved outside the relay, so that the magnetic line of force does not act on internal magnetic circuits and the magnetic retentivity and the contact pressure are changeless.
Description
Technical field
The utility model relates to a kind of resistance, more precisely a kind of sampling resistor.
Background technology
Along with electronic arrival, common electromechanical metering ammeter is replaced by intelligentized ammeter gradually, thereby realizes the functions such as Long-distance Control, long-range charge.Magnetic latching relay is widely used in this field.
But in actual use, occurred that error count amount and switch misoperation phenomenon have appearred in this kind of magnetic latching relay and supporting sampling resistor under the interference of power frequency magnetic field and stationary magnetic field, when the power frequency magnetic field interference of 0.5mT is arranged in the ammeter environment for use, common sampling resistor is in Zhong De position, magnetic field, because magnetic line of force one direction is crossed the cross section of sampling resistor, induced current is more than Gao Shida 10mA, and this has affected normal Electro-metering.The above-mentioned disadvantages affect existed due to prior art this kind of product application prospect in the ammeter field.
The utility model content
The purpose of this utility model is to provide a kind of sampling resistor, and it can solve the serious shortcoming of magnetic disturbance phenomenon of the prior art.
The utility model is by the following technical solutions: a kind of sampling resistor, comprise U-shaped sampling resistor main body, and the equal-height position of the dual-side of described sampling resistor main body the same side is outstanding respectively forms a sampling point, and wherein adjacent place and the equidirectional outstanding formation datum mark of described sampling point of the above sampling point of side; Described sampling resistor main body is the formation that is fixed as one of two fine copper sheets and a slice manganin sheet; Described sampling point is connected with sample line, and the outside of described sample line is arranged with heat-shrink tube.
Distance between the dual-side of described U-shaped main body is 4mm.
Described manganin sheet is fixed between two described fine copper sheets.
The utility model has the advantages that: the utility model has the advantages that: the sampling resistor in the utility model is when having the magnetic line of force to pass, the induct current direction produced in two conductors is contrary, amplitude equates, thereby can cancel out each other, well solved the interference of alternating magnetic field, and because the electrical pure iron stretching of the high magnetic conduction of relay1 case material selection forms, the paint baking of insulation is made on surface, when being enclosed within the relay outside, it can effectively be shielded the magnetic line of force, make it not act on inner magnetic circuit, magnetic confining force and contact force are all less than changing.
The accompanying drawing explanation
Below in conjunction with embodiment and accompanying drawing, the utility model is elaborated, wherein:
Fig. 1 is structural representation of the present utility model.
Embodiment
Further set forth embodiment of the present utility model below in conjunction with accompanying drawing:
Sampling resistor as a kind of as Fig. 1, comprise U-shaped sampling resistor main body 1, and the equal-height position of the dual-side of described sampling resistor main body the same side is outstanding respectively forms a sampling point 12, and wherein adjacent place and the equidirectional outstanding formation datum mark 13 of described sampling point of the above sampling point of side; Described sampling resistor main body is the formation that is fixed as one of two fine copper sheets and a slice manganin sheet; Described sampling point is connected with sample line, and the outside of described sample line is arranged with heat-shrink tube.
Distance between the dual-side of described U-shaped main body is 4mm.
Described manganin sheet is fixed between two described fine copper sheets.
Sampling resistor of the present utility model adopts full copper-manganese structure through symmetrical bending, and reduce distance between the two as far as possible, when having the magnetic line of force to pass, the induct current direction produced in two conductors is contrary, amplitude is equal, thereby can cancel out each other, and through measured current, is less than 1mA, ammeter was exported without effective in this magnetic field after 30 minutes, the interference that has well solved alternating magnetic field.
Because magnetic latching relay and sampling resistor are made of one, (be greater than 300mT) when there is strong stationary magnetic field in the external world, additional magnetic field can exert an influence to the magnetic circuit of relay itself, makes actuating of relay change in voltage larger, can make the switch misoperation when serious, the stealing event is occurred repeatedly.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection range of the present utility model.
Claims (3)
1. a sampling resistor, it is characterized in that, comprise U-shaped sampling resistor main body, and the equal-height position of the dual-side of described sampling resistor main body the same side is outstanding respectively forms a sampling point, and wherein adjacent place and the equidirectional outstanding formation datum mark of described sampling point of the above sampling point of side; Described sampling resistor main body is the formation that is fixed as one of two fine copper sheets and a slice manganin sheet; Described sampling point is connected with sample line, and the outside of described sample line is arranged with heat-shrink tube.
2. sampling resistor according to claim 1, is characterized in that, the distance between the dual-side of described U-shaped main body is 4mm.
3. sampling resistor according to claim 1, is characterized in that, described manganin sheet is fixed between two described fine copper sheets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202839106U CN203325611U (en) | 2013-05-23 | 2013-05-23 | Sampling resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202839106U CN203325611U (en) | 2013-05-23 | 2013-05-23 | Sampling resistor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203325611U true CN203325611U (en) | 2013-12-04 |
Family
ID=49664925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202839106U Expired - Fee Related CN203325611U (en) | 2013-05-23 | 2013-05-23 | Sampling resistor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203325611U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2013
- 2013-05-23 CN CN2013202839106U patent/CN203325611U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2014079238A1 (en) | Electronic electric meter resistant to alternating magnetic field interferences | |
| CN203191419U (en) | Intelligent electricity meter with diamagnetic structured electromagnetic current transformers | |
| CN103630716B (en) | A kind of anti-interference shunt and electronic electric energy meter thereof | |
| CN203587681U (en) | Electronic electric energy meter resistant to magnetic-field interference | |
| CN202870138U (en) | Manganin shunt and electronic Watt-hour meter | |
| CN203325611U (en) | Sampling resistor | |
| CN2929727Y (en) | Anti-magnet manganese-copper resistor shunt with shield cover | |
| CN203325613U (en) | Sampling resistor | |
| CN203366879U (en) | Sampling resistor and magnetic latching relay | |
| CN110836987B (en) | Manganese-copper shunt of three-phase intelligent electric energy meter and application thereof | |
| CN203311953U (en) | Sampling resistor capable of resisting interference of alternating magnetic field and magnetic latching relay | |
| CN203232765U (en) | Sampling resistor and magnetic latching relay | |
| CN106055757B (en) | The design method of the anti-power frequency magnetic field interference of ac circuit based on finite element analysis | |
| CN208690031U (en) | A kind of standard attenuator resistance saddle | |
| CN201689775U (en) | Manganin mutual inductor preventing alternating magnetic field | |
| CN204028161U (en) | A kind of current sample composite structure resisting strong magnetic for electric energy meter | |
| CN208207036U (en) | A kind of shaped grooved manganese copper diverter | |
| CN203772959U (en) | Sensor convenient to measure resistance value | |
| CN106601551A (en) | Electrical contactor and ways to reduce its depth | |
| CN203134706U (en) | Magnetic latching relay for electronic type electric meter | |
| CN202133699U (en) | Metal sampling resistor used for current measuring | |
| CN203798849U (en) | Intelligent electric meter relay support assembly for resolving power-frequency magnetic field interference | |
| CN202854212U (en) | Manganin current sampling device with external magnetic field interference resistance | |
| CN204302334U (en) | A kind of device based on the interference of magnetoelectric transducer switchgear shielding external magnetic field | |
| CN220626493U (en) | High-precision shunt |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131204 Termination date: 20140523 |