CN105706194A - Current transformer for low voltage residual current circuit breakers - Google Patents
Current transformer for low voltage residual current circuit breakers Download PDFInfo
- Publication number
- CN105706194A CN105706194A CN201480057110.XA CN201480057110A CN105706194A CN 105706194 A CN105706194 A CN 105706194A CN 201480057110 A CN201480057110 A CN 201480057110A CN 105706194 A CN105706194 A CN 105706194A
- Authority
- CN
- China
- Prior art keywords
- current transformer
- printed circuit
- contact rod
- magnetic core
- conductive gasket
- 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
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/22—Instruments transformers for single phase ac
- H01F38/28—Current transformers
- H01F38/30—Constructions
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/22—Instruments transformers for single phase ac
- H01F38/28—Current transformers
- H01F38/32—Circuit arrangements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/22—Instruments transformers for single phase ac
- H01F38/28—Current transformers
- H01F38/30—Constructions
- H01F2038/305—Constructions with toroidal magnetic core
Abstract
The invention discloses a current transformer (1) for low voltage residual current circuit breakers. The current transformer is characterized in that it comprises: a first magnetic core (2); primary winding means comprising one or more primary conductors (31, 32, 33, 34) passing through said first magnetic core; secondary winding means comprising one or more first secondary conductors (42) passing through said first magnetic core; first electric contacts (51, 52, 53, 54) and second electric contacts (61, 62, 63, 64) for connection of said primary conductors to one or more further conductors. The primary conductors (31, 32, 33, 34) are formed by conductive bars each having a first shaped end (311, 321, 331, 341) and a second shaped end (312, 322, 332, 342). The current transformer comprises a first printed circuit (5) comprising one or more first conductive pads (51, 52, 53, 54) arranged to form the first electric contacts of said current transformer. Each of said conductive bars has the first shaped end (311, 321, 331, 341) fixed to said first printed circuit at a respective first conductive pad (51, 52, 53, 54) of said first printed circuit so as to be mechanically supported by said first printed circuit and be electrically connected to said first conductive pad.
Description
The present invention relates to a kind of current transformer for low-voltage RCCB。
Low-voltage RCCB (voltage lower than 1kV exchange and 1.5kV direct current) make Current Transformer or ampere transformer (TA) be widely known。
Typically, ampere transformer or current transformer include magnetic core and the primary winding structure being operatively associated with magnetic core and secondary windings structure。
Primary winding structure is formed by one or more primary conductors, and these one or more primary conductors can electrically connect with the terminal of RCCB or electrical contact, and the terminal of RCCB or electrical contact are then connected to circuit and/or the neutral conductor of electric wire。
Secondary windings structure is formed by one or more secondary conductor, and these one or more secondary conductor are through magnetic core and such as can be connected with control electronics。
The operability of the ampere transformer in RCCB is installed and is typically required the specific shaping operation performing armature winding, and this generally has to manually perform, consequently, it is possible to cause the overall dimensions of chopper and produce and the dramatically increasing of installation cost。
The main task of the present invention is to provide a kind of current transformer for low-voltage RCCB, and it can overcome disadvantages mentioned above。
In this task, it is a further object to provide a kind of current transformer with extremely simple and firm structure。
It is a further object to provide a kind of current transformer, it can be easily mounted in RCCB by the operation that can automatically perform。
It is also another object of the present invention to provide a kind of current transformer in the easy and cheap production of industrial level。
According to the present invention, by the current transformer for under-voltage circuit breaker according to claim 1 and associated dependent claims, it will realizing this task and these purposes and other purpose, they will become apparent from from explanation subsequently and accompanying drawing。
With reference to the description given below purely provided for explanatory and nonrestrictive purpose and accompanying drawing, it will will be apparent from the further feature of the present invention and advantage, wherein:
Fig. 1-2 schematically shows the embodiment of the current transformer according to the present invention；
Fig. 3-5 schematically shows the further embodiment of the current transformer according to the present invention；
Fig. 6-7 schematically shows the further embodiment of the current transformer according to the present invention；
Fig. 8 schematically shows another embodiment of the current transformer according to the present invention；And
Fig. 9 schematically shows example in the embodiment of Fig. 3-5, according to the installation in RCCB of the current transformer of the present invention。
With reference to above-mentioned accompanying drawing, the present invention relates to the current transformer 1 for low-voltage RCCB。
Current transformer 1 includes first magnetic core 2 with substantially a ring-shaped structure。
Magnetic core 2 includes the first forming cavity 21 through this core thickness。
In some embodiments of the invention, current transformer 1 can include second magnetic core 8 with substantially a ring-shaped structure。
In time there are the second magnetic core 8, it includes the second forming cavity 81 through this core thickness。
Magnetic core 2 and 8 can be disposed side by side (Fig. 7) or be separated by spacer elements。
Current transformer 1 includes primary winding arrangement, and it includes through magnetic core 2, specifically through one or more primary conductors 31,32,33,34 of forming cavity 21。
When current transformer 1 includes the second magnetic core 8, primary conductor 31,32,33,34 is also through the second magnetic core 8, specifically through forming cavity 81。
Preferably, each in primary conductor 31,32,33,34 is set to extend only through magnetic core 2 and once (therefore forms the single turn (singleturn) relevant to magnetic core 2)。
Similarly, when current transformer 1 includes the second magnetic core 8, each in primary conductor 31,32,33,34 is set to extend only through the second magnetic core 8 once。
Current transformer 1 includes secondary winding arrangement, and it includes through magnetic core 2, specifically through one or more first secondary conductor 41 of forming cavity 21。
Preferably, each in secondary conductor 41 is disposed through magnetic core more than 2 time, therefore forms the multiturn being wound around magnetic core 2。
When current transformer 1 includes the second magnetic core 8, secondary winding arrangement includes through the second magnetic core 8, specifically through one or more second subprime conductors 42 of forming cavity 81。
Preferably, each in secondary conductor 42 is disposed through the second magnetic core more than 8 time。
Current transformer 1 is arranged such that primary conductor 31,32,33,34 can with one or more corresponding other conductor 151,152,153,154,161,162,163,164 electrical connections, and these other conductors are such as terminal or the electrical contacts (Fig. 8-9) of the RCCB being wherein provided with transformer。
Advantageously, current transformer 1 includes the first electrical contact and the second electrical contact for primary conductor 31,32,33,34 is connected to other conductor 151,152,153,154,161,162,163,164。
By this way, the electric current that will be detected or measure can circulate along primary conductor 31,32,33,34。
According to the present invention, primary conductor 31,32,33,34 is formed by the contact rod shaped。
As it has been described above, the forming cavity 21 of contact rod 31,32,33,34 traverse magnetic core 2。
When current transformer 1 includes the second magnetic core 8, contact rod 31,32,33,34 is also through the forming cavity 81 of the second magnetic core 8。
Shape each in rod 31,32,33,34 and be advantageously provided with first the 311,321,331,341 and second shaping end 312,322,332,342, shaping end。
Contact rod 31,32,33,34 is designed size (diameter or thickness especially with regard to them) according to the rated current of circulation。
Contact rod 31,32,33,34 can be made of copper and covered by insulation material layer。
Preferably, contact rod 31,32,33,34 extends point-blank, but they can have more complicated structure as required。
According to the present invention, current transformer 1 includes the first printed circuit 5, and it includes one or more first conductive gasket 51,52,53,54。
Conductive gasket 51,52,53,54 is arranged to above-mentioned first electrical contact forming current transformer 1。For this, they are advantageously arranged to electrically isolated from one。
Conductive gasket 51,52,53,54 can be advantageously employed known process technology and produce, and the one or more surfaces that can be placed on printed circuit 5 according to selecting to produce the processing type of this printed circuit。
Preferably, conductive gasket 51,52,53,54 is disposed in the surface towards contact rod 31,32,33,34 of printed circuit 5。
Preferably, conductive gasket 51,52,53,54 is configured to have relatively wide area relative to the erection space placing them in surface thereon, it is advantageous to be greater than or equal to available erection space 90% area。
It can be seen that when the rated current of identical circulation, this heat exchange that will can significantly improve between current transformer 1 and surrounding。
According to the present invention, printed circuit 5 is connected to contact rod 31,32,33,34 at conductive gasket 51,52,53,54 place by operatively (electrically and mechanically)。
Specifically, each in contact rod 31,32,33,34 has the corresponding first shaping end 311,321,331,341 being fixed to printed circuit 5 at corresponding conductive gasket 51,52,53,54 place。
Produce the coupling between the end 311,321,331,341 of each contact rod 31,32,33,34 and corresponding conductive gasket 51,52,53,54, so that each the printed circuit 5 in contact rod 31,32,33,34 mechanically supports and be electrically connected to corresponding conductive gasket 51,52,53,54。
Preferably, for the obvious cause of restriction overall dimensions, printed circuit 5 is vertically arranged relative to contact rod 31,32,33,34, as shown in the above Fig.。
In some embodiments of the invention, it is possible to by welding or being operatively connected between hard solder generation contact rod 31,32,33,34 and conductive gasket 51,52,53,54。
According to a preferred embodiment of the invention, printed circuit 5 includes one or more first connecting hole 55,56,57,58, and each of which is placed on corresponding conductive gasket 51,52,53,54 place。
Preferably, the pressure of the shaping end 311,321,331,341 of each in contact rod 31,32,33,34 inserts (coupling of " press-in coordinates " type) in the corresponding connecting hole 55,56,57,58 of printed circuit 5。
By this way, contact rod 31,32,33,34 mechanically couples with printed circuit 5 (with the auspicious effect also functioned to contact rod mechanical support), and electrically connect with corresponding conductive gasket 51,52,53,54, thus allowing the current flowing between rod and conductive gasket。
Advantageously, the end 311,321,331,341 of each in contact rod 31,32,33,34 is shaped advantageously the form into spicule, and the reliable of edge being appropriately designed the size corresponding connecting hole 55,56,57,58 to guarantee and be wherein inserted with this end mechanically and electrically couples。
In those embodiments of the invention, the operability between contact rod 31,32,33,34 and printed circuit 5 couples and need not weld or blazing operation。
It is particularly simple in the such production of industrial level, is characterized in that there is of a relatively high coefficient of heat transfer and relatively low contact resistance, and As time goes on guarantees high reliability。
In some embodiments of the invention (Fig. 1-2), the shaping end 312,322,332,342 of contact rod 31,32,33,34 can be connected with above-mentioned second electrical contact of current transformer 1 by the electrical connection of known type。
According to a preferred embodiment of the invention, current transformer 1 includes the second printed circuit 6。
Printed circuit 6 includes one or more second conductive gasket 61,62,63,64。
Conductive gasket 61,62,63,64 is arranged to above-mentioned second electrical contact forming current transformer 1。
For this, they are advantageously arranged to electrically isolated from one。
Similarly, conductive gasket 61,62,63,64 can be advantageously employed known process technology and produce, and can be placed on one or more surfaces of printed circuit 6 according to selected processing type。
Preferably, conductive gasket 61,62,63,64 is disposed in the surface of the contact rod 31,32,33,34 towards transformer 1 of printed circuit 6。
Preferably, conductive gasket 61,62,63,64 is configured to have relatively wide area relative to the erection space on the surface placing them in printed circuit 6 thereon, it is advantageous to be greater than or equal to available erection space 90% area。
Advantageously, printed circuit 6 is connected to contact rod 31,32,33,34 at conductive gasket 61,62,63,64 place by operatively (electrically and mechanically)。
Specifically, each in contact rod 31,32,33,34 has the corresponding second shaping end 312,322,332,342 being fixed to printed circuit 6 at corresponding conductive gasket 61,62,63,64 place。
Produce coupling between the end 312,322,332,342 of contact rod 31,32,33,34, so that each the printed circuit 6 in contact rod 31,32,33,34 mechanically supports and be electrically connected to corresponding conductive gasket 61,62,63,64。
Preferably, for the obvious cause of restriction overall dimensions, similarly, printed circuit 6 is vertically arranged relative to contact rod 31,32,33,34, as shown in fig. 3 to 7。
In some embodiments of the invention, it is possible to by welding or being operatively connected between hard solder generation contact rod 31,32,33,34 and conductive gasket 61,62,63,64。
According to a preferred embodiment of the invention, printed circuit 6 includes one or more second connecting hole 65,66,67,68, and each of which is placed on corresponding conductive gasket 61,62,63,64 place。
Preferably, end 312,322,332,342 pressure that shapes of each in contact rod 31,32,33,34 is inserted in the corresponding connecting hole 65,66,67,68 of printed circuit 6。
For this, the end 312,322,332,342 of each in contact rod 31,32,33,34 is shaped advantageously the form into spicule, and the effective of edge being appropriately designed the size corresponding connecting hole 65,66,67,68 to guarantee and be wherein inserted with this end mechanically and electrically couples。
Preferably, current transformer 1 includes the first separation structure 7 for contact rod 31,32,33,34。
Separation structure 7 is advantageously adapted to serve as the distance piece for above-mentioned contact rod, so that it is guaranteed that they correctly place and be electrically isolated from each other。
Preferably, separation structure 7 is positioned in the forming cavity 21 of magnetic core 2, to reduce the overall dimensions of current transformer 1。
Preferably, separation structure 7 includes being arranged (such as utilizing crisscross configuration) is multiple first insulation walls 71 that two two places limit one or more first housings for contact rod 31,32,33,34。
When including the second magnetic core 8, current transformer 1 preferably includes the second separation structure 9 for contact rod 31,32,33,34。
Preferably, separation structure 9 is positioned in the forming cavity 81 of the second magnetic core 8。
Preferably, separation structure 9 includes being arranged (such as utilizing crisscross configuration) is multiple first insulation walls 91 that two two places limit one or more second housings for contact rod 31,32,33,34。
According to some embodiments of the present invention (Fig. 8), current transformer 1 is operatively connected to electronic installation 200, for instance be wherein provided with the control unit of the chopper of current transformer 1。
Electronic installation 200 is electrically connected to the secondary winding arrangement of current transformer 1, is specifically connected to the first secondary conductor 41, and when it is present, be connected to second subprime conductor 42。
Electronic installation 200 (such as including microprocessor unit) is suitable to (electric current) receiving and processing from secondary winding arrangement 4 and detects or measure signal。
Advantageously, current transformer 1 includes the 3rd electrical contact for secondary conductor 41 and/or 42 being connected with above-mentioned electronic installation。
Preferably, printed circuit 5 and/or printed circuit 6 include at least one installing space for disposing electronic installation 200。
Preferably, printed circuit 5 and/or printed circuit 6 include being arranged to one or more 3rd liners 201 of above-mentioned 3rd electrical contact forming current transformer。
Preferably, electronic installation 200 and relevant conductive gasket 201 are placed on one or more surfaces of printed circuit 5 and/or printed circuit 6。
In the embodiment shown in fig. 8, electronic installation 200 is operatively placed on installing space 202 place of printed circuit 5。
According to other embodiments, they can be operatively placed only on printed circuit 6 place, or is simultaneously placed to printed circuit 5 and 6 place。
It is clear that at least one place being arranged in printed circuit 5,6 by electronic installation 200 can simplify the structure of the chopper being wherein provided with current transformer 1。
It is actually not required prepare special electronic cards to dispose electronic installation 200, because can easily with the installing space 202 provided by printed circuit 5,6。
One importance of the present invention relates to a kind of RCCB 900, and it includes current transformer 1。
In fig .9, RCCB 900 includes the current transformer 1 in the embodiment of Fig. 3-5。
Chopper 900 includes input terminal 181,182,183,184 and the lead-out terminal 161,162,163,164 that can be connected to one or more (circuit and/or neutrality) conductor of electric wire (not shown)。
Chopper 900 also includes the moving contact 151,152,153,154 that can intercouple/separate and determines contact 171,172,173,174。
Advantageously, current transformer 1 is installed such that contact rod 31,32,33,34 is electrically connected to lead-out terminal 161,162,163,164 and the moving contact 151,152,153,154 of chopper。
Therefore conductive gasket 51,52,53,54 electrically connects with moving contact 151,152,153,154, and conductive gasket 61,62,63,64 electrically connects with lead-out terminal 161,162,163,164。
Therefore the contact rod 31,32,33,34 of current transformer 1 guarantees the electric continuity between lead-out terminal and the moving contact of chopper 900。
Current transformer 1 can detect the circulation of the residue fault current along contact rod 31,32,33,34, and therefore, it is possible to detection exists earth leakage current in being connected to the electric wire of input and output side of chopper 900。
It is clear that the concrete structure of current transformer 1 is conducive to the current transformer 1 installation in chopper 900。
In current transformer 1, conductive gasket 51,52,53,54,61,62,63,64 has been electrically connected to contact rod 31,32,33,34, and is in predetermined position relative to contact rod 31,32,33,34。
These conductive gaskets easily reach and provide relatively large surface, carry out the terminal with chopper 900 and electrical contact formation electrically connects。
It can be seen that the current transformer 1 according to the present invention is the purpose how allowing task meet and realizing setting in practice。
Current transformer 1 has robust and compact structure, it is possible to be easily connected with the terminal of chopper or electrical contact。
Current transformer 1 installation in the switch can be performed by the operation can being easily automated at industrial level。
The primary winding arrangement of current transformer need not be curved and shaping operation。
The installing space in Current Transformer can also be made to place the electronic control unit of chopper。
This is at the overall dimensions of reduction chopper and provides very big benefit in the minimizing production time。
Current transformer 1 easily produces at industrial level, and has cost-competitive compared with the ampere transformer for the low-voltage RCCB of known type。
Claims (11)
1. the current transformer (1) for low-voltage RCCB, including:
First magnetic core (2)；
Primary winding arrangement, including the one or more primary conductors (31,32,33,34) through described first magnetic core；
Secondary winding arrangement, including one or more first secondary conductor (42) through described first magnetic core；
First electrical contact (51,52,53,54) and the second electrical contact (61,62,63,64), for being connected to one or more other conductor by described primary conductor；
It is characterized in that, described primary conductor (31, 32, 33, 34) formed by contact rod, each contact rod has the first shaping end (311, 321, 331, 341) and the second shapes end (312, 322, 332, 342), described current transformer includes the first printed circuit (5), described first printed circuit (5) includes one or more first conductive gaskets (51 forming described first electrical contact, 52, 53, 54), each in described contact rod has corresponding first conductive gasket (51 at described first printed circuit, 52, 53, 54) place is fixed to the first shaping end (311 of described first printed circuit, 321, 331, 341), thus each in described contact rod is mechanically supported and is electrically connected to described first conductive gasket by described first printed circuit。
2. current transformer according to claim 1, it is characterized in that, described first printed circuit (5) includes one or more first connecting hole (55,56,57,58), each is placed on corresponding first conductive gasket (51,52,53, the 54) place of described first printed circuit, and described first of each in described contact rod shapes end (311,321,331,341) and be inserted in corresponding first connecting hole of described first printed circuit with pressure。
3. according to the one or more described current transformer in the claims, it is characterized in that, described current transformer includes the second printed circuit (6), described second printed circuit (6) includes one or more second conductive gaskets (61 forming described second electrical contact, 62, 63, 64), each in described contact rod has corresponding second conductive gasket (61 at described second printed circuit, 62, 63, 64) place is fixed to the second shaping end (313 of described second printed circuit, 323, 333, 343), thus each in described contact rod is mechanically supported and is electrically connected to described second conductive gasket by described second printed circuit。
4. current transformer according to claim 3, it is characterized in that, described second printed circuit (6) includes one or more second connecting hole (65,66,67,68), each is placed on corresponding second conductive gasket (61,62,63, the 64) place of described second printed circuit, and described second of each in described contact rod shapes end (312,322,332,342) and be inserted in corresponding second connecting hole of described second printed circuit with pressure。
5. according to the one or more described current transformer in the claims, it is characterized in that, described current transformer includes the first separation structure (7) for described contact rod, and described first separation structure is positioned in first forming cavity (21) of described first magnetic core (2)。
6. current transformer according to claim 5, it is characterised in that described first separation structure (7) includes two two places and limits multiple first insulation walls (71) of the first housing for described contact rod。
7. according to the one or more described current transformer in the claims, it is characterized in that, described current transformer includes the second magnetic core (8), described second magnetic core includes second forming cavity (81) of the thickness through described second magnetic core, described contact rod (31,32,33,34) is through described second magnetic core, and described secondary winding arrangement includes the one or more second subprime conductors (42) through described second magnetic core。
8. current transformer according to claim 7, it is characterized in that, described current transformer includes the second separation structure (9) for described contact rod, and described second separation structure is positioned in second forming cavity (81) of described second magnetic core (8)。
9. current transformer according to claim 8, it is characterised in that described second separation structure (9) includes two two places and limits multiple second insulation walls (91) of the second housing for described contact rod。
10. according to the one or more described current transformer in claim 3 to 9, it is characterized in that, described secondary winding arrangement is electrically connected to electronic installation (200), and described first printed circuit (5) and/or described second printed circuit (6) include at least one installing space (202) for described electronic installation。
11. a low-voltage RCCB (900), it is characterised in that described low-voltage RCCB includes according to the one or more current transformer (1) in the claims。
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITMI2013A001736 | 2013-10-17 | ||
| IT001736A ITMI20131736A1 (en) | 2013-10-17 | 2013-10-17 | CURRENT TRANSFORMER FOR LOW VOLTAGE DIFFERENTIAL SWITCHES |
| PCT/EP2014/071978 WO2015055628A1 (en) | 2013-10-17 | 2014-10-14 | Current transformer for low voltage residual current circuit breakers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105706194A true CN105706194A (en) | 2016-06-22 |
Family
ID=49725224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201480057110.XA Pending CN105706194A (en) | 2013-10-17 | 2014-10-14 | Current transformer for low voltage residual current circuit breakers |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3058576B1 (en) |
| CN (1) | CN105706194A (en) |
| IT (1) | ITMI20131736A1 (en) |
| WO (1) | WO2015055628A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112447385A (en) * | 2020-12-03 | 2021-03-05 | 国创新能源汽车智慧能源装备创新中心(江苏)有限公司 | High-power electric leakage mutual inductor for copper bar measurement |
| CN114905438A (en) * | 2022-06-02 | 2022-08-16 | Abb瑞士股份有限公司 | Conductor positioning device for leakage mutual inductor and leakage detection equipment |
| CN114905438B (en) * | 2022-06-02 | 2024-05-03 | Abb瑞士股份有限公司 | Conductor positioning device for leakage transformer and leakage detection equipment |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS582010A (en) * | 1981-06-25 | 1983-01-07 | Matsushita Electric Ind Co Ltd | High-frequency heater |
| JPH0343931A (en) * | 1989-07-10 | 1991-02-25 | Fuji Electric Co Ltd | Leakage detector of earth leakage breaker |
| JPH04267028A (en) * | 1991-02-21 | 1992-09-22 | Fuji Electric Co Ltd | Overcurrent trip device for circuit breaker |
| CN1700547A (en) * | 2004-05-18 | 2005-11-23 | 柳仁基 | Integrated breaker for electric leakage and manufacturing method thereof |
| CN2836202Y (en) * | 2005-08-01 | 2006-11-08 | 西华大学 | PCB-based hollow coil current transformer |
| GB2455847A (en) * | 2007-12-19 | 2009-06-24 | Atreus Entpr Ltd | A current transformer using magnetic elements to improve the core balance |
| US7948724B2 (en) * | 2008-09-25 | 2011-05-24 | Eaton Corporation | Current transformer support bracket and circuit interrupter including the same |
| CN202905448U (en) * | 2012-11-12 | 2013-04-24 | 常熟开关制造有限公司(原常熟开关厂） | Master loop fixing structure for zero sequence current transformers |
-
2013
- 2013-10-17 IT IT001736A patent/ITMI20131736A1/en unknown
-
2014
- 2014-10-14 WO PCT/EP2014/071978 patent/WO2015055628A1/en active Application Filing
- 2014-10-14 EP EP14795967.0A patent/EP3058576B1/en not_active Not-in-force
- 2014-10-14 CN CN201480057110.XA patent/CN105706194A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS582010A (en) * | 1981-06-25 | 1983-01-07 | Matsushita Electric Ind Co Ltd | High-frequency heater |
| JPH0343931A (en) * | 1989-07-10 | 1991-02-25 | Fuji Electric Co Ltd | Leakage detector of earth leakage breaker |
| JPH04267028A (en) * | 1991-02-21 | 1992-09-22 | Fuji Electric Co Ltd | Overcurrent trip device for circuit breaker |
| CN1700547A (en) * | 2004-05-18 | 2005-11-23 | 柳仁基 | Integrated breaker for electric leakage and manufacturing method thereof |
| CN2836202Y (en) * | 2005-08-01 | 2006-11-08 | 西华大学 | PCB-based hollow coil current transformer |
| GB2455847A (en) * | 2007-12-19 | 2009-06-24 | Atreus Entpr Ltd | A current transformer using magnetic elements to improve the core balance |
| US7948724B2 (en) * | 2008-09-25 | 2011-05-24 | Eaton Corporation | Current transformer support bracket and circuit interrupter including the same |
| CN202905448U (en) * | 2012-11-12 | 2013-04-24 | 常熟开关制造有限公司(原常熟开关厂） | Master loop fixing structure for zero sequence current transformers |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112447385A (en) * | 2020-12-03 | 2021-03-05 | 国创新能源汽车智慧能源装备创新中心(江苏)有限公司 | High-power electric leakage mutual inductor for copper bar measurement |
| CN114905438A (en) * | 2022-06-02 | 2022-08-16 | Abb瑞士股份有限公司 | Conductor positioning device for leakage mutual inductor and leakage detection equipment |
| CN114905438B (en) * | 2022-06-02 | 2024-05-03 | Abb瑞士股份有限公司 | Conductor positioning device for leakage transformer and leakage detection equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3058576A1 (en) | 2016-08-24 |
| EP3058576B1 (en) | 2018-05-30 |
| WO2015055628A1 (en) | 2015-04-23 |
| ITMI20131736A1 (en) | 2015-04-18 |
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| AD01 | Patent right deemed abandoned | ||
| AD01 | Patent right deemed abandoned |
Effective date of abandoning: 20190423 |