CN101958191B - Zero sequence current mutual inductor - Google Patents
Zero sequence current mutual inductor Download PDFInfo
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- CN101958191B CN101958191B CN2010102623348A CN201010262334A CN101958191B CN 101958191 B CN101958191 B CN 101958191B CN 2010102623348 A CN2010102623348 A CN 2010102623348A CN 201010262334 A CN201010262334 A CN 201010262334A CN 101958191 B CN101958191 B CN 101958191B
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Abstract
The invention relates to a zero sequence current mutual inductor. A separated region is positioned in the center of the zero sequence current mutual inductor body (1), so that the zero sequence current mutual inductor body (1) is divided into a front separated region structure (11) of the mutual inductor body and a back separated region structure (12) of the mutual inductor body; the front separated region structure (11) of the mutual inductor body and the back separated region structure (12) of the mutual inductor body have a cross raised structure respectively, and are both divided into four separated regions, and a conductive copper rod (2) and back conductive copper bars are integrated into a whole; the conductive copper rod (2) is arranged in the central separated region of the zero sequence current mutual inductor body (1); a threaded hole (2-a) is formed on the conductive copper rod (2); a screw (4) passes through the zero sequence current mutual inductor, so that front conductive copper bars are connected with the back conductive copper bars welded on the conductive copper rod (2); and the front conductive copper bars are positioned on the front separated region structure (11) of the mutual inductor body, and the back conductive copper bars are positioned on the back separated region structure (12) of the mutual inductor body.
Description
Technical field
The present invention relates to a kind of zero sequence current mutual inductor, relate in particular to the zero sequence current mutual inductor that a kind of residual current circuit breaker is used.
Background technology
In the three-phase low-voltage power supply system, when load and insulation whens symmetry all, the vector of its three-phase current with equal zero.If a certain insulation mutually of three phase network is destroyed or electric leakage or ground connection has been taken place, the vector of three-phase current and non-vanishing then, this electric current is commonly referred to as zero-sequence current.Zero sequence current mutual inductor is used for measuring the zero-sequence current size.Instrument transformer is enclosed within the outside of contact rod, and promptly three-phase current passes the primary side (the former limit of a lead) of the iron core of zero sequence current mutual inductor as it, according to the requirement of sensitivity and angle characteristic, on iron core, is wound with the secondary side of the coil of some circles as it.When electric leakage or earth fault take place in primary system, will produce zero-sequence current, utilize electromagnetic induction principle, just can induce electromotive force (or electric current) at secondary side, through measuring the size and the phase place of secondary singal, just can learn the electric leakage situation of electrical network.
In residual current circuit breaker, zero sequence current mutual inductor is an important component part, and whether the structural design of zero sequence current mutual inductor is reasonable, with the overall volume designed size that directly has influence on residual current circuit breaker, structural design problem such as compactness whether.
At present, the traditional zero sequence current mutual inductor that is used for residual current circuit breaker generally is made up of current transformer body, conducting copper.Because the RCCB inner space is limited, the volume of current transformer body also is restricted, so the shape of conducting copper is bending, when the actual installation conducting copper very difficulty, the especially instrument transformer of four phases more difficulty wear row; Simultaneously because the zero sequence current mutual inductor major loop structure; Three-phase conducting copper (or four phases) needs insulation processing each other; Traditional method is to swathe insulating tape on the conducting copper surface, and when the row of wearing, very easily causes the damage that scratches of insulating tape, need swathe insulating tape again; Again the row of wearing strengthens workload; Traditional zero sequence current mutual inductor conducting copper behind also takes up room in the thermal element junction with release.Therefore when the design residual current circuit breaker, zero sequence current mutual inductor is an important consideration point.
Summary of the invention
Technical problem to be solved:
The invention provides a kind of novel zero sequence current mutual inductor structure to above deficiency, this structure had both solved original zero sequence current mutual inductor and had worn the defective when arranging, and did not increase the volume of zero sequence current mutual inductor again, and easy to assembly.
Technical scheme:
A kind of zero sequence current mutual inductor comprises zero sequence current mutual inductor body, conduction copper rod, first back side conducting copper, second back side conducting copper, the first front conducting copper, the second front conducting copper, screw;
The center of zero sequence current mutual inductor body is provided with separated region, is divided into current transformer body front separated region structure and current transformer body back side separated region structure; Current transformer body front separated region structure and current transformer body back side separated region structure are the cross bulge-structure; Current transformer body front separated region structure is divided into positive first area, front second area, positive the 3rd zone, positive the 4th zone with the front; Current transformer body back side separated region structure is divided into first area, the back side, back side second area, the 3rd zone, the back side, the 4th zone, the back side with the back side;
First back side conducting copper is provided with the connecting hole that links to each other with release with second back side conducting copper;
One end of the first front conducting copper and the second front conducting copper is provided with and supplies external cabling row and the fastening connecting hole of circuit breaker, the connecting hole of the first front conducting copper and the second front conducting copper and circuit breaker base, fabrication hole; The other end is provided with positive the 4th hole;
The conduction copper rod and first back side conducting copper and second back side conducting copper are as a whole; The conduction copper rod is arranged on the central compartment zone of zero sequence current mutual inductor body, and first back side conducting copper is positioned at back side second area, and two second back side conducting coppers lay respectively at the 3rd zone and the 4th zone, the back side, the back side;
The conduction copper rod is provided with screwed hole; The 4th hole, front that screw passes the first front conducting copper and the second front conducting copper is installed on the screwed hole, and screw passes zero sequence current mutual inductor the first front conducting copper is linked to each other with second back side conducting copper with first back side conducting copper that is welded on the conduction copper rod with the second front conducting copper;
The first front conducting copper is positioned at the front second area, and two second front conducting coppers are positioned at positive the 3rd zone and positive the 4th zone.
Described first back side conducting copper is setting first hole, the back side and second hole, the back side at one end with the connecting hole that links to each other with release that second back side conducting copper is provided with.
One end of the described first front conducting copper and the second front conducting copper is provided with and supplies external cabling row and the fastening connecting hole of circuit breaker is positive first hole; The connecting hole of the first front conducting copper and the second front conducting copper and circuit breaker base is positive second hole; Fabrication hole is positive the 3rd hole.
The first front conducting copper and the second front conducting copper are common copper busbar.
Second back side conducting copper is the heater element material, and first back side conducting copper material is divided into two kinds, and the part that is provided with first hole, the back side and second hole, the back side is the heater element material, and another part is common copper busbar.
Beneficial effect:
Four separated regions at instrument transformer body of the present invention center play the insulation protection effect, have reduced the operation that conducting copper swathes insulating tape, have shortened man-hour; The conduction copper rod is provided with screwed hole, is used for screw front and back conducting copper, has avoided the numerous and diverse row's of wearing operation, has saved the space of occupying of nut, installs more convenient; The screwed hole of back side conducting copper and release junction (first hole, the back side, second hole, the back side) is arranged on the vertical part of copper bar, does not establish the bending structure, aspect being connected of release, is saving the space.
Description of drawings
Fig. 1 is the structural representation of zero sequence current mutual inductor;
Fig. 2 is the rearview of zero sequence current mutual inductor;
Fig. 3 is the structural representation of the back side of the present invention conducting copper and conduction copper rod;
Fig. 4 is the structural representation of front of the present invention conducting copper;
Fig. 5 is the front view of zero sequence current mutual inductor body of the present invention;
Fig. 6 is the rearview of zero sequence current mutual inductor body of the present invention;
Fig. 7 is a zero sequence current mutual inductor and the sketch map that is connected of release;
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done explanation in further detail.
To shown in Figure 7,1 is the zero sequence current mutual inductor body like Fig. 1; The 11st, current transformer body front separated region structure, 11-a is positive first area, and 11-b is the front second area, and 11-c is positive the 3rd zone, and 11-d is positive the 4th zone; 12 is current transformer body back side separated region structure, and 12-a is first area, the back side, and 12-b is a back side second area, and 12-c is the 3rd zone, the back side, and 12-d is the 4th zone, the back side; 2 are the conduction copper rod, and 2-a is a screwed hole; 31-a is first back side conducting copper, and 31-b is second back side conducting copper, and 32-a is the first front conducting copper, and 32-b is the second front conducting copper; 4 is screw, and 5 is first hole, the back side, and 6 is second hole, the back side, and 7 is positive first hole, and 8 is positive second hole, 9 positive the 3rd holes, and 10 is positive the 4th hole.
Zero sequence current mutual inductor of the present invention comprises zero sequence current mutual inductor body 1, conduction copper rod 2, first back side conducting copper 31-a, second back side conducting copper 31-b, the first front conducting copper 32-a, the second front conducting copper 32-b, screw 4.
The center of zero sequence current mutual inductor body 1 is provided with separated region, is divided into current transformer body front separated region structure 11 and current transformer body back side separated region structure 12; Front separated region structure 11 is the cross bulge-structure with back side separated region structure 12; Current transformer body front separated region structure 11 is divided into positive first area 11-a, front second area 11-b, positive the 3rd regional 11-c, positive the 4th regional 11-d (as shown in Figure 5) with the front; Current transformer body back side separated region structure 12 is divided into first area, back side 12-a, back side second area 12-b, the back side the 3rd regional 12-c, the back side the 4th regional 12-d (as shown in Figure 6) with the back side;
The end of first back side conducting copper 31-a and second back side conducting copper 31-b is provided with first hole 5 and second hole 6, the back side, the back side;
The Bian Yiduan that sells off of the first front conducting copper 32-a and the second front conducting copper 32-b is provided with positive first hole 7 and positive second hole 8, is provided with positive the 4th hole 10 at the other end, is provided with positive the 3rd hole 9 at vertical plane near selling off the place, limit;
First hole 5, the back side, second hole 6, the back side is the connecting hole that links to each other with release;
Positive first hole 7 is external cabling row and the fastening connecting hole of circuit breaker, and positive second hole 8 is the connecting hole of the first front conducting copper and the second front conducting copper and circuit breaker base, and positive the 3rd hole 9 is a fabrication hole;
Conduction copper rod 2 is welded into an integral body with back side conducting copper; Conduction copper rod 2 is arranged on the central compartment zone of zero sequence current mutual inductor body 1, and first back side conducting copper 31-a is positioned at back side second area 12-b, and two second back side conducting copper 31-b are positioned at the back side the 3rd regional 12-c, the back side the 4th regional 12-d;
Conduction copper rod 2 is provided with screwed hole 2-a, and the 4th hole 10, front that screw 4 passes the front conducting copper is installed on the screwed hole 2-a, and screw 4 passes zero sequence current mutual inductor the front conducting copper is linked to each other with the back side conducting copper that is welded on conduction copper rod 2;
The first front conducting copper 32-a is positioned at front second area 11-b, and two second front conducting copper 32-b are positioned at positive the 3rd regional 11-c and positive the 4th regional 11-d;
The first front conducting copper 32-a and the second front conducting copper 32-b are common copper busbar;
Second back side conducting copper 31-b is the heater element material, and described first back side conducting copper 31-a material is divided into two kinds, and the part that is provided with first hole 5, the back side and second hole 6, the back side is the heater element material, and another part is common copper busbar.
Four separated regions at said zero sequence current mutual inductor body 1 center are placed conduction copper rod 2, also can play the insulation protection effect simultaneously, have reduced conducting copper and have swathed this operation of insulating tape.
Said conduction copper rod 2 is provided with screwed hole 2-a, is used for screw 4 fixing front and back conducting coppers, has avoided the numerous and diverse row's of wearing operation.
Screw 4 passes zero sequence current mutual inductor with the front conducting copper; Be connected with back side conducting copper two parts of conduction copper rod 2 welding; Compare with traditional zero sequence current mutual inductor,, connect through screw because its conducting copper is divided into two parts; Therefore the operation that does not have the row of wearing need not to increase the volume of current transformer body; Because zero sequence current mutual inductor body 1 itself has the structure of separated region, need not swathe insulating tape on the conducting copper simultaneously, shorten man-hour.Simultaneously, traditional instrument transformer is that conducting copper and heater element are linked together with screw in conducting copper and release coupling part; And the back side conducting copper in this structure itself is exactly the heater element material, has so both saved material, also saves the inner space of RCCB.
Compare with existing instrument transformer structure, the zero sequence current mutual inductor among the present invention is simplified aspect number of components more, and conduction copper rod 2 is welded into a whole with back side conducting copper; Zero sequence current mutual inductor among the present invention is provided with screwed hole 2-a in conduction on the copper rod 2, only needs in addition fastening getting final product of screw, saves the space of occupying of nut; Secondly existing instrument transformer back side conducting copper is provided with screwed hole at bending part; Be used for being connected with release; And the screwed hole of back side conducting copper and release junction in the zero sequence current mutual inductor of the present invention (first hole 5, the back side, second hole 6, the back side) is arranged on the vertical part of copper bar; Do not establish the bending structure, aspect being connected of release, saving the space.
Though the present invention with preferred embodiment openly as above; But they are not to be used for limiting the present invention; Anyly be familiar with this art; In spirit that does not break away from the present invention and scope, certainly when can doing various variations or retouching, so being as the criterion of should being defined with the application's claim protection range of protection scope of the present invention.
Claims (5)
1. a zero sequence current mutual inductor is characterized in that: comprise zero sequence current mutual inductor body (1), conduction copper rod (2), first back side conducting copper (31-a), second back side conducting copper (31-b), the first front conducting copper (32-a), the second front conducting copper (32-b), screw (4);
The center of zero sequence current mutual inductor body (1) is provided with separated region, is divided into current transformer body front separated region structure (11) and current transformer body back side separated region structure (12); Current transformer body front separated region structure (11) and current transformer body back side separated region structure (12) are the cross bulge-structure; Current transformer body front separated region structure (11) is divided into positive first area (11-a), front second area (11-b), positive the 3rd zone (11-c), positive the 4th zone (11-d) with the front; Current transformer body back side separated region structure (12) is divided into first area, the back side (12-a), back side second area (12-b), the 3rd zone, the back side (12-c), the 4th zone, the back side (12-d) with the back side;
First back side conducting copper (31-a) is provided with the connecting hole that links to each other with release with second back side conducting copper (31-b);
One end of the first front conducting copper (32-a) and the second front conducting copper (32-b) is provided with and supplies external cabling row and the fastening connecting hole of circuit breaker, and with the connecting hole of circuit breaker base, fabrication hole, the other end are provided with positive the 4th hole (10);
Conduction copper rod (2) is as a whole with first back side conducting copper (31-a) and second back side conducting copper (31-b); Conduction copper rod (2) is arranged on the central compartment zone of zero sequence current mutual inductor body (1); First back side conducting copper (31-a) is positioned at back side second area (12-b), and two second back side conducting coppers (31-b) lay respectively at the 3rd zone, the back side (12-c) and the 4th zone, the back side (12-d);
Conduction copper rod (2) is provided with screwed hole (2-a); The 4th hole, front (10) that screw (4) passes the first front conducting copper (32-a) and the second front conducting copper (32-b) is installed on the screwed hole (2-a), and screw (4) passes zero sequence current mutual inductor the first front conducting copper (32-a) is linked to each other with second back side conducting copper (31-b) with first back side conducting copper (31-a) that is welded on conduction copper rod (2) with the second front conducting copper (32-b);
The first front conducting copper (32-a) is positioned at front second area (11-b), and two second front conducting coppers (32-b) are positioned at positive the 3rd zone (11-c) and positive the 4th zone (11-d).
2. a kind of zero sequence current mutual inductor according to claim 1 is characterized in that: described first back side conducting copper (31-a) is setting first hole, the back side (5) and second hole, the back side (6) at one end with the connecting hole that links to each other with release that second back side conducting copper (31-b) is provided with.
3. a kind of zero sequence current mutual inductor according to claim 1 is characterized in that: an end of the described first front conducting copper (32-a) and the second front conducting copper (32-b) is provided with and supplies external cabling row and the fastening connecting hole of circuit breaker is positive first hole (7); The first front conducting copper (32-a) and the second front conducting copper (32-b) are positive second hole (8) with the connecting hole of circuit breaker base; Fabrication hole is positive the 3rd hole (9).
4. a kind of zero sequence current mutual inductor according to claim 1 is characterized in that: the described first front conducting copper (32-a) and the second front conducting copper (32-b) are common copper busbar.
5. a kind of zero sequence current mutual inductor according to claim 2; It is characterized in that: described second back side conducting copper (31-b) is the heater element material; Described first back side conducting copper (31-a) material is divided into two kinds; The part that is provided with first hole, the back side (5) and second hole, the back side (6) is the heater element material, and another part is common copper busbar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102623348A CN101958191B (en) | 2010-08-25 | 2010-08-25 | Zero sequence current mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102623348A CN101958191B (en) | 2010-08-25 | 2010-08-25 | Zero sequence current mutual inductor |
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| CN101958191A CN101958191A (en) | 2011-01-26 |
| CN101958191B true CN101958191B (en) | 2012-04-25 |
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| CN2010102623348A Active CN101958191B (en) | 2010-08-25 | 2010-08-25 | Zero sequence current mutual inductor |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107146692B (en) * | 2017-07-12 | 2018-11-30 | 无锡晶磊电子有限公司 | High frequency three-phase reactor |
| CN108010812A (en) * | 2017-11-29 | 2018-05-08 | 江苏辉能电气有限公司 | A kind of main circuit conductor distribution structure of zero sequence current mutual inductor |
| CN112447385B (en) * | 2020-12-03 | 2022-04-01 | 国创移动能源创新中心(江苏)有限公司 | High-power electric leakage mutual inductor for copper bar measurement |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2147632Y (en) * | 1992-12-31 | 1993-11-24 | 大连第一互感器厂 | Zero-sequence current mutual-inductor |
| JP3210820B2 (en) * | 1994-11-15 | 2001-09-25 | 松下電工株式会社 | Earth leakage breaker |
| JP3704885B2 (en) * | 1997-05-19 | 2005-10-12 | 富士電機機器制御株式会社 | Leakage current detection structure of earth leakage breaker |
| JP3375277B2 (en) * | 1998-02-26 | 2003-02-10 | 株式会社日立製作所 | Earth leakage breaker |
| CN2473740Y (en) * | 2001-04-29 | 2002-01-23 | 锡山市宏泰电器有限责任公司 | Mutual induction mechanism in residual current breaker |
| CN2487089Y (en) * | 2001-08-03 | 2002-04-17 | 上海电器科学研究所 | Main loop structure of zero sequence current mutual inductor |
| US8111504B2 (en) * | 2008-12-16 | 2012-02-07 | Schneider Electric USA, Inc. | Current sensor assembly |
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Effective date of registration: 20220513 Address after: 212132 No. 97, Wufengshan Road, Dagang, New District, Zhenjiang City, Jiangsu Province Patentee after: Huineng low voltage electric appliance (Jiangsu) Co.,Ltd. Address before: 212000 A5, electromechanical Industrial Park, Xinggang East Road, new area, Zhenjiang City, Jiangsu Province Patentee before: Jiangsu Phono Electric Co.,Ltd. |
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Address after: 212132 No. 97, Wufengshan Road, Dagang, New District, Zhenjiang City, Jiangsu Province Patentee after: Eaton Huineng low voltage electrical appliances (Jiangsu) Co.,Ltd. Address before: 212132 No. 97, Wufengshan Road, Dagang, New District, Zhenjiang City, Jiangsu Province Patentee before: Huineng low voltage electric appliance (Jiangsu) Co.,Ltd. |
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