CN101552127A - Mutual inductor unit with twice through electronic tripping device - Google Patents
Mutual inductor unit with twice through electronic tripping device Download PDFInfo
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- CN101552127A CN101552127A CNA2009100023943A CN200910002394A CN101552127A CN 101552127 A CN101552127 A CN 101552127A CN A2009100023943 A CNA2009100023943 A CN A2009100023943A CN 200910002394 A CN200910002394 A CN 200910002394A CN 101552127 A CN101552127 A CN 101552127A
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- 239000004020 conductor Substances 0.000 claims abstract description 97
- 238000004804 winding Methods 0.000 claims abstract description 15
- 238000005452 bending Methods 0.000 claims abstract description 7
- 229910052751 metal Inorganic materials 0.000 claims abstract description 3
- 239000002184 metal Substances 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 22
- 238000003466 welding Methods 0.000 claims description 5
- 230000009466 transformation Effects 0.000 abstract description 5
- 238000009434 installation Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 229910000679 solder Inorganic materials 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000002775 capsule Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000005405 multipole Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/123—Automatic release mechanisms with or without manual release using a solid-state trip unit
- H01H71/125—Automatic release mechanisms with or without manual release using a solid-state trip unit characterised by sensing elements, e.g. current transformers
-
- 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
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/06—Coil winding
- H01F41/061—Winding flat conductive wires or sheets
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/06—Coil winding
- H01F41/076—Forming taps or terminals while winding, e.g. by wrapping or soldering the wire onto pins, or by directly forming terminals from the wire
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2847—Sheets; Strips
- H01F2027/2861—Coil formed by folding a blank
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2847—Sheets; Strips
- H01F27/2852—Construction of conductive connections, of leads
-
- 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
- H01F38/38—Instruments transformers for polyphase ac
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/08—Terminals; Connections
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
- H01H71/7409—Interchangeable elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
- H01H83/14—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection
- H01H83/144—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection with differential transformer
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Breakers (AREA)
Abstract
The invention relates to a mutual inductor unit with twice through electronic tripping device. The electronic tripping device includes electronics modules associated with current transformation elements (10) for each conductor. According to the invention, a first conductor (14) forms a loop around the magnetic circuit, although the first conductor is rigid, its only includes a single weld spot (36) easy to produce heat loss. To this end, the conductor (14) is pre-formed by bending metal plates. The bending of one of the two components of the conductor is completed by winding the housing (20) of each transformation elements (10).
Description
Technical field
The present invention relates to tripping operation by switch (switchgear) unit of electron process realization.More specifically, the present invention relates to a kind of being used for to current transformer (current transformer) unit of the electronic tripping device power supply that can be incorporated into existing switch element, the thermal loss of existing switch element is minimized.
According to a feature, the present invention relates to a kind of unsteady flow (current transformation) element, though wherein Primary Conductor is a rigidity, also twines, and only comprise single solder joint around magnetic circuit.Unit with a plurality of elements also is a goal of the invention with the tripgear (trip device) that comprises conversion (transformation) element.
The invention still further relates to the method that is used to assemble inverting element, this method comprises at least one distortion and welding thereof of two parts that Primary Conductor is installed, these parts.
Background technology
Circuit breaker (circuit breaker) 1 acts on the leading body of power circuit, and three leading bodies have been shown in the framework of Fig. 1.Leading body is connected to via terminal strip 2 on the contact of switch element 3, and described contact can make the closed or disconnection of the primary current that flows through there.Mould shell (moulded case) overall dimensions of circuit breaker 1 more or less by standardization, and limited by the scope of switch element 3.Breaker of plastic casing 1 comprises that itself is connected to the tripgear 4 of power circuit via terminal strip 5, and tripgear makes the contact of switch element 3 be actuated in mode timely.Tripgear 4 is loaded in the shell 6, and this shell is arranged in the housing of circuit breaker 1 and/or switch element 3.Usually tripgear is removable, has only when circuit breaker and/or switch element have been mounted, and just tripgear is encased in wherein.In addition, in order to satisfy various demands, tripgear 4 is normally tradable, and the scope of these demands is from protecting superlative degree protection substantially, comprising many set-points and/or different measurement functions, as voltage, and power and/or energy measurement.
The tripgear 4 of traditional type is an electronic tripping device, comprises the electronic module 7 that is associated with current transformer unit 8.Electronic module 7 comprises the integrated processing unit of printed circuit board type, and this integrated processing unit is protected in the housing of being made by insulating material, via the signal of suitable connector 98 reception indication distribution electric currents from the unit.When the value of current signal surpassed predetermined threshold value with Preset Time, processing unit sent signal to switch element 3 and comes separately its paired contact.
Mutual inductor unit 8 has two major functions: the input signal that provides representative wanting the electric current that flows through in the protected power circuit to electronic module 7, and provide necessary electric power for the operation of tripgear 4.In fact, the primary current that is associated with power circuit has and electron process module 7 unmatched values.Therefore, mutual inductor unit 8 comprises the inverting element 10 that is used for every utmost point, schematically illustrates in Fig. 2, and inverting element mainly comprises magnetic circuit 12, Primary Conductor 14 is passed this magnetic circuit, and wherein this Primary Conductor is connected to switch element 3 from power supply 5 and via its other end 5 '.The secondary circuit 16 that comprises the winding with spiral wire turn is used for unsteady flow and necessary signals is transported to electronic module 7.
Mutual inductor unit 8 can be operated with the primary current that can change between power supply default value and working value.In both cases, the magnetization of magnetic circuit 12 (magnetisation) must adapt with signal transmission, and is also unsaturated during also enough and heavy current during weak current.Document US 5 015 983 has proposed, and Primary Conductor 14 is wrapped on the magnetic circuit 12, does not sacrifice the sensitivity of current transformer 10 so that keep the constant input power on the electronic module 7.Because so that connect and assembling, one time winding generally comprises at least three parts to the connection terminal strip 5 of electronic tripping device 4,5 ' by the rigid conductive made, wherein, intermediate member is soldered to electric current input bar at the place, two ends.In order to obtain little quota, intermediate member can be flexible.When operating current intensity increased, winding wire turn cross section increased, and the difficulty of coiled conductor also increases.So through being shaped in advance with specific purpose tool, conductor becomes the winding form.
Though from the viewpoint of operation, these solutions are gratifying, need two solder joints at least for each Primary Conductor 14.The cost that causes except required time and necessary operation amount increased and failure risk increases, these solder joints had reduced the resistance of whole assembly, have increased thermal losses.
Summary of the invention
Except other advantage, the objective of the invention is to remedy the deficiency of existing inverting element, and less Primary Conductor installation steps meet size restrictions simultaneously.
According to a feature, the present invention relates to a kind of unsteady flow element, wherein, particularly the rigidity Primary Conductor of being made by the bending metallic plate forms the loop of essentially rectangular around magnetic circuit.In order to reduce heating, Primary Conductor only comprises two parts, and these two parts weld via an end at the level height place of loop or be fastening.For each parts that makes conductor can both pass the center of magnetic circuit, at least one parts can not bend fully at its place, end.Especially, the angle between the loop both sides is the obtuse angle, and, in case it when being installed in the housing of inverting element, nearly 90 ° of this corner connection.
Especially, unsteady flow element according to the present invention comprise by secondary winding partly around magnetic circuit, this winding is equipped with the housing protection of the passage that is preferably rectangle, this passage passes magnetic circuit.The rigidity Primary Conductor preferably cuts out and bends from metallic plate, comprises two input and output terminal intercell connectors at its place, end, and this Primary Conductor is passed the passage of housing for twice, thereby forms the loop of essentially rectangular.Conductor can be divided into nine parts that continue, two terminal strips and two mid portions are surrounded as ring, ring by two in passage parallel and part that be convenient to coplane form, have two terminal strips being associated with two mid portions (these two mid portions are around parallel and be preferably the loop that the part of coplane forms in passage by two), with channel part quadrature and they are connected to two lateral parts of the relative part parallel with channel part roughly.Preferably, the terminal intercell connector is parallel to each other, and advantageously relative to each other translation, especially, defines four parallel planes by channel part with relative.For conductor can be installed to around the housing box, and optimize welding and other crimping intensity, conductor comprises two parts, and these parts are at the terminal intercell connector with between the abutting end on the loop part.The end of the every parts of conductor preferably includes engaging mechanism, for example in conjunction with the lug boss operation that can be inserted in the hole.Two parts of conductor can be the symmetry also can be asymmetric.
Though for element according to the present invention, regardless of the otch of the loop of conductor, the pre-parts that form of at least one of conductor all can not be installed in the passage, in case install, as long as make at least one part distortion just can obtain final structure.Distortion preferably realizes at the level height place of one of bending of two parts of the parts of conductor separately.Especially, advantageously, each parts of conductor all roughly are bent into net shape, only open wide several angles (angle) or even angle than final form.
Therefore, the present invention relates to a kind of method, wherein, each parts of conductor are mounted, and at least one parts or two parts are out of shape by the one or more angles between two ends of closed these one or two parts, make the abutting end of parts cooperate.Then, weld or fastening.Advantageously, conductor has only an insufficient closure of parts, and it was installed in the passage of housing before inserting second conductor part and distortion.
Unsteady flow element according to the present invention is used for the electronic tripping device of switchgear.Preferably, a plurality of elements are associated has the multipole unit corresponding with the number of poles of switchgear with formation.Advantageously, the alignment of the intercell connector of element is installed with convenient.Assembling in such unit can successively be carried out, but according to the present invention preferably, before other process of continuation to each step of the direct method iterates of each parts of conductor.Especially, advantageously carry out the distortion of each parts simultaneously.
Unit or element are associated with electronic module, so that form electronic tripping device.Preferably, there is suitable mechanism, assembles by module clip is tightened on mutual inductor unit or the element.Connector transmits information from secondary winding to electronic module.Tripgear can be associated with switchgear, also is the circuit breaker of the object of the invention so that form.
Description of drawings
By following description to the specific embodiment of the invention, other advantage and feature will be more obvious.Embodiment shown in the accompanying drawing only is used for example and limits the present invention by no means.
Fig. 1 shows circuit breaker, comprises that the electronic tripping device according to the mutual inductor unit of the embodiment of the invention can be installed in wherein.
Fig. 2 schematically shows the operation of the inverting element of electronic tripping device.
Fig. 3 has shown electronic tripping device according to the preferred embodiment of the invention.
Fig. 4 has shown the general shape that is used for according to the Primary Conductor of inverting element of the present invention.
Fig. 5 A and 5B show the installation step according to the Primary Conductor of the inverting element of the embodiment of the invention.
Embodiment
Below will describe the present invention according to the preferred embodiment that is used for three electrode current circuit breakers 1 shown in Figure 1, this circuit breaker comprises that three pairs of contacts are used for interrupting the electric current of each phase in the three-phase.But, according to inverting element 10 of the present invention and/or unit 8 applicable in the existing difference switchgear of " moulding shell ", particularly 25 to 100A, even 250A, and irrelevant with the quantity of the utmost point.
In order to simplify explanation to the preferred embodiment of the present invention, will mutual inductor unit 8 be described with respect to assembling/installation site, in this position, circuit breaker 1 keeps flat, and the recess 6 of housing is towards last.Use such as such relative position term such as " laterally ", " side direction ", " top ", " level height (level) " should not be regarded as restrictive factor.
As shown in Figure 1, tripgear 4 defines the outside capsule in the recess 6 of the housing that is plugged on circuit breaker 1.Also as shown in Figure 3, described capsule illustrates by the assembling of electron process module 7 with current transformer unit 8.Mutual inductor unit comprises the inverting element 10 of right quantity
1, 10
2, 10
3, each element all is used for the conductor of power circuit, and these elements are fastened to each other to form monoblock 8 or still to keep independently of one another.Each inverting element 10 makes the high value primary current that is associated with power circuit be transformed to the secondary current that matches with electron process module 7.Preferably, further be included as the rectification circuit of electronic tripping device 4 supply of current according to inverting element of the present invention.
Therefore, each inverting element 10 is associated with Primary Conductor 14, and this Primary Conductor is designed to be connected to power circuit via an end, and is connected to switchgear 3 via the other end.For this reason, Primary Conductor 14 is provided with input (load-side) terminal intercell connector 5 and outlet terminal intercell connector 5 ', and these two intercell connectors are preferably parallel to each other.Connect for simplifying, each intercell connector 5,5 ' is formed by the rigid conductive metallic plate that becomes such as aluminium or copper, and its cross section and size are suitable for institute's electric current transmitted and are provided with porose 18,18 '.Especially, load-side intercell connector 5 has the modular size with respect to power values, output intercell connector 5
1', 5
2', 5
3' shape depend on switch element 3.Especially, load-side intercell connector 5 is squares that the length of side is measured as 13mm, and in being the copper of 2mm, thickness is drilled with the hole 18 of diameter about 9.5 to 10mm, and line side intercell connector 5 ' can be the length of side be measured as 7 to 10mm rectangle, and has the elliptical aperture 18 ' (for example the minor face of elliptical aperture is 4.5 to 4.7mm, and long limit is 6 to 6.5mm) that allows position deviation.
For convenience in switch element 3 and electronic module 7 assemblings, be preferably rectangle according to the magnetic circuit 12 of inverting element 10 of the present invention.Magnetic circuit 12 a side, preferably on the less bottom side at rectangle by coil 16 around pass magnetic circuit 12 for several times so that form the secondary conductor 16 of this coil.Secondary winding 16 comprises that at its place, end connector 9, this connector are connected to electronic module so that (that is, about secondary current) information itself provides the direct information about primary current about secondary singal to its transmission.Connector 9 preferably is applicable on the edge that is connected printed circuit board (PCB), as document FR 2 907 265 is described.Magnetic circuit 12 and secondary winding 16 are installed in the insulation shell 20 with suitable shape, and this housing is cuboid basically and is provided with and is used for the passage 22 that Primary Conductor 14 is passed.According to required selection, auxiliary equipment can be associated with the housing 20 of inverting element 10, and for example voltage measurement or voltage increase the auxiliary equipment of form.
Inverting element 10 according to the present invention is suitable for low rated value circuit breaker especially, particularly arrives in the scope of 100A 25.In order to obtain the signal of representation transformation after-current, Primary Conductor 14 must repeatedly be passed magnetic circuit 12, and this is because the electric current that flows through does not therein have the power supply threshold value that is used for tripgear 4 and enough levels of measurement under the mode of operation.Therefore, conductor 14 must twine around the magnetic circuit 12 of tripgear 4 or any transducer that is associated with it, so that can be for measuring and the correct processing signals of power supply.So the loop 24 that forms has rectangular shape roughly, and a side of passing passage 22 is formed by two parts 26 of conductor 14.Except the restriction of the cross section that depending on of conductor flow through current strength wherein, conductor 14 also on its whole length all be rigidity to keep the position of loop 24 around magnetic circuit 12.Especially, the distance between the wire turn 26 that keeps conductor 14 on the level height of passage 22, thus directly cover this passage 22 without insulant.
As shown in Figure 4, preferably, pass two parts 26 of the conductor of passage 22
1, 26
2In same plane, and insulated or be used to install extra insulation shielding thing by enough spaced apart being used to.According to the preferred embodiment of the present invention, Primary Conductor 14 has been twined more than a circle around magnetic circuit 12, is 1 and 1/8th circles especially.The load-side intercell connector 5 of conductor 14 and line side intercell connector 5 ' be skew in fact each other in the housing of circuit breaker 1, and inverting element 10 allows this restriction.By the terminal strip 5 of conductor, 5 ' and to pass the plane that the part 26 of passage 22 limits by conductor preferably parallel, twist with the metallic plate of avoiding forming conductor 14.
So conductor 14 comprises in succession:
1) the flat first terminal intercell connector 5
1
2) first mid portion 28
1, with the first terminal intercell connector 5
1Form an angle;
3) the first passage part 26
1, with the first terminal intercell connector 5
1Almost parallel;
4) first lateral part 30
1, with first passage part 26
1Quadrature roughly;
5) relative part 32 is with channel part 26
1The part almost parallel;
6) second lateral part 30
2, with first lateral part 30
1Almost parallel;
7) the second channel part 26
2, with described first passage part 26
1Coplane;
8) second mid portion 28
2, with second channel part 26
2Form an angle;
9) the second terminal intercell connector 5
2
In order to ensure two passages 26 (that is, 26 in the magnetic circuit 22
1, 26
2Between two parts) coplane, be to middle part 28
1, 28
2With at least one lateral part 30
1Suitably cut.
For around housing 20 and pass passage 22 and settle above-mentioned three-dimensional structure, conductor 14 need be fabricated at least two parts, and suggestion is adopted and is welded to connect them.According to the present invention, because the heat that the solder joint high resistance produces, be fabricated to two parts 34 according to the conductor 14 of element 10 of the present invention in order to reduce
1, 34
2, each parts comprises end bar 5
1, 5
2One.In addition, reduce the quantity of solder joint 36, on manufacturing time of being paid close attention to and cost, also have advantage, increased reliability simultaneously.
Yet, the size restrictions of the mutual inductor unit 8 of electronic tripping device 4 and electronic tripping device 4 makes, can not be with conductor separated into two parts on the level height of its loop 24, in the passage 22 of the housing 20 of the magnetic circuit 12 of the conductor shape of choosing from rectangle loop 24 can not being planted.For example, for 25 to the circuit breakers 1 of 100A scope, the rectangular channel 22 that housing 20 is comprised has width I being parallel on intercell connector 5, the 5 ' direction
22=14mm also has height h
22=6mm, degree of depth p
22=15.5mm.The electric current that the cross section basis of conductor 14 flows through therein is (at 10A/mm
2Scope in) calibration so that the two parts 26 of conductor that pass passage 22 are in thickness h
26Has minimum widith I during=2mm
26=5mm, and according to the insulation space must separate about 0.5 or 1mm at interval.Housing parts 38 thickness that conductor 14 is twined are at least h
38=8mm (degree of depth p
38During=15.5mm).No matter which kind of otch loop 24 adopts, in case be shaped, one in the parts 34 of conductor 14 can not be passed passage 22 at least.
According to the present invention, though be rigidity, at least one parts 34 of conductor
1Unshaped is a net shape before inserting passage 22.But for the housing 20 " distortion " that rigid conductor can be made around molded plastics, each parts 34 all is made of metal, is folded to net shape roughly.Especially, shown in Fig. 5 A, only at first parts 34
1The level height at junction point 36 on terminal part, at this corresponding to part 32 relatively, remove the angle that aperture surpasses 90 ° from its final position, this recommends for loop 24, so that described parts 34
1Can inject in the passage 22.The clamped-in style retention mechanism is not fully being exerted pressure with closed loop 24 on the parts of bending, and the change respective angles forms the final configuration shown in Fig. 5 B.Because distortion occurs in the place that bent early stage, so distortion adapts with the rigidity of conductor 14 and the fragility of casing 20.
Advantageously, first parts 34 of conductor
1Comprise: size can be passed the output connection bar 5 ' of passage 22; With terminal strip 5
1Become 90 mid portions 28 to hexagonal angle
1Channel part 26
1The lateral part 30 of quadrature roughly
1, be set to form horizontal-shift with the channel part 26 of loop 24; The relative part 32 of loop 24 is though it is parallel to terminal strip 5
1, even in the lateral part 30
1Prolongation in, but it and lateral part 30
1Become to surpass 90 ° angle,, be 115 ° especially such as about 100 to 135 °.First parts 34
1Terminal part, be relative part 32 at this, be provided with engaging mechanism in the place, end of part relatively at this, particularly lug boss 36
1Second parts 34 of conductor
2Comprise: input wires bar 5; Mid portion 28
2, with input wires bar quadrature roughly, and on a side, have the width gradient, so that arrive and terminal strip 5
2Almost parallel but the littler channel part 26 of size
2The lateral part 30 of quadrature roughly
2, be provided with the coupling device 36 of cooperating with the coupling device of first parts at its place, end
2, at this such as the hole.
In order to assemble,, terminal strip 5 ' carries out conductor first parts 34 by being inserted passage 22
1The first step of insertion.In case first passage part 26
1Be installed in the appropriate location of passage 22, then carry out second step, make first parts 34 by folded end part 32
1Be shaped.Assembling is passed through via second parts 34
2End sections 30
2, 36
2Second parts 34 with conductor
2Insert and continue.By two parts 34
1, 34
2Coupling device 36
1, 36
2Between cooperation, these two parts are joined together, for example hole as shown in Figure 4 and lug boss cooperate, perhaps the protuberance of two complementations as shown in Figure 5 cooperates, perhaps other solution arbitrarily.At last, weld.22 the level height place in the hole is installed in two parts 34 with insulant
1, 34
2Between.Can also be at conductor two parts 34
1, 34
2After being placed on passage 22, carry out first parts 34
1Distortion.In addition, though welding is preferred fastening means, other fastening method also is feasible, such as with two ends 36
1, 36
2Curl each other.
In some structure, especially junction point 36 is placed in the position of suitable installation, if and/or output connection bar 5 ' can not pass the passage 22 of housing 20, two parts 34 are not made final structure, are feasible and finish two distortion by the terminal angle between closed two parts around the housing 20 of magnetic circuit 12 yet.For example, conductor two parts 34 can be symmetrical.It is also conceivable that two angles between three parts of one of opening feature 34 and two distortion carrying out parts.In fact two parts 34 that form Primary Conductor 14 have is convenient to geometry and the otch installing and assemble.
Can carry out such assembling to each inverting element 10, these inverting elements are fastened to and form the piece that comprises right quantity conductor 14 together then.According to another selection, monoblock 8 comprises magnetic circuit 12, secondary winding 16, and the add ons that can be included in the sensor type in the housing.Each conductor 14 is assemblied in electronic component 10
iOn, form its parts on passage 22 level heights.Before continuing assembling, preferred adjoining land is finished each installation step of all conductors 14.Especially, be out of shape by the closure at angle and divide into groups at one time simultaneously or finish continuously.
The quantity of the utmost point no matter preferably is associated with integrated electronic modules 7 as patent application FR 0800130 is described according to mutual inductor unit 8 of the present invention.Although other fixing means as screw is fastening so also is feasible, utilization advantageously comprises the housing that is fastened to mutual inductor unit 8 by flexible engagement or clamping according to the electronic module 7 of the tripgear 4 of mutual inductor unit 8 of the present invention.This method helps fast and directly assembling, allows to adopt the proper implements dismounting simultaneously.Along with " operation " of clip along vertical axis, the opposing of assembly counter stress has further been guaranteed in the optimization of the shape of locking.
Tripgear 4 can be installed in the housing of circuit breaker 1 and be attached to switch element 3.When beginning to assemble, the hole of the intercell connector 5 ' of tripgear 4 and switch element 3 faces with each other, and fixes by bar-shaped auxiliary equipment.In order to simplify and quicken the installation of these two members, tripgear 4 according to the present invention is provided with (breakable) screw 40 that can break, for example as document FR 2 881 485 or FR 2 840 373 described types, the top of screw can be attached to stave, directly is positioned at (see figure 1) in the connecting hole 5 ' so that align.Each screw 40 all is tightened, and when screw-down torque is enough, leaves the part of screw.The bottom of screw 40 connects, and the end is connected on the stave, is attached to housing securely or can be removed.This selection can prevent that widget is lost in the power distribution cabinet.
Therefore, can make the following possibility that becomes according to mount scheme of the present invention:
-by reducing junction point 36, reduce the quantity that quality problems and/or adjustment take place;
-by reducing the quantity of parts 34 and charge and discharge operations, can reduce the quantity of erection stage and alleviate the complexity of erection stage, and reduce equipment cost;
The heat generating spot 36 of-minimizing equipment;
-by using flexible joint and in the assembly of unit 8 and module 7, eliminating the mistake proofing means of wrong probability, be convenient to the assembling of electronic tripping device 4.
Though with reference to the electronic trip system description of electric switch equipment the present invention, the present invention is not limited thereto.The present invention can relate to other element.Especially, the design with conductor of two parts can be used in other current sensor or the instrument transformer.
Claims (17)
1, a kind of current transformer element (10) that is used for the tripgear (4) of switchgear (3) comprising:
-housing (20), wherein, be positioned with by secondary winding (16) partly around magnetic circuit (12), described housing (20) is provided with the passage (22) that passes this magnetic circuit (12); With
-Primary Conductor (14), comprise two input and output terminal strips (5,5 ') at its place, end, described conductor (14) forms the loop (24) that is roughly rectangle, so that described passage (22) is passed at the level height place at two channel parts (26) of this conductor for twice, each of described two parts all passed through mid portion (28) and is connected to terminal strip (5), so that described conductor (14) comprises first terminal strip (5 in succession
1), first mid portion (28
1), first passage part (26
1), first lateral part (30
1), relatively partly (32), second lateral part (30
2), second channel part (26
2), second mid portion (28
2) and second terminal strip (5
2), described channel part and relative part (26,32) almost parallel, and described lateral part (30) relative partly quadrature roughly with this;
It is characterized in that described conductor (14) is a rigidity, make by the metal of bending, and comprise two parts (34 that are attached to securely each other
1, 34
2), each parts of described conductor (34) comprise terminal strip (5) and abutting end (36).
2, element according to claim 1, wherein, two parts (34 of described conductor (14)
1, 34
2) fixed to one another by welding.
3, according to a described element in claim 1 or 2, wherein, two channel parts (26) of described conductor (14) are coplanes.
4, according to a described element in the claim 1 to 3, described terminal strip (5,5 ') is parallel with relative part (32) with described channel part (26).
5, element according to claim 4, wherein, each all is in described terminal strip (5,5 ') in the plane different with described channel part (26), and described terminal strip is offset each other.
6, according to a described element in the claim 1 to 5, wherein, two parts (34 of described conductor
1, 34
2) about being mutually symmetrical.
7, a kind of current transformer unit (8), comprise a plurality of according to the described element (10) in the claim 1 to 6, wherein, each element (10
1, 10
2, 10
3) input wires bar (5), output connection bar (5 ') is aligned respectively.
8, unit according to claim 7, wherein, the housing (20) of each element (10) is firmly-fixed to each other and comprises clamp system.
9, a kind of tripgear of switch element (4), comprise a plurality of according to the described element (10) in the claim 1 to 6 or comprise that according to described unit (8) in claim 7 or 8 and electronic module (7) this electronic module is connected to each secondary winding (16) of described element or unit by connector (9).
10, a kind of circuit breaker comprises tripgear according to claim 9 (4) and is provided with relative to each other the movably switchgear of contact (3) that described contact can be actuated by described tripgear (4).
11, the assembly method of a kind of current transformer element (10), this current transformer element (10) comprise the secondary winding (16) that is accommodated in the housing (20) partly around magnetic circuit (12), this housing (20) is provided with the passage (22) that passes described magnetic circuit (12), and described method comprises:
-with first parts (34 of rigidity Primary Conductor
1) be inserted in the described passage (22), these first parts comprise terminal strip (5
1) and first abutting end (36
1);
-with second parts (34 of rigidity Primary Conductor
2) be inserted in the described passage (22), these second parts comprise terminal strip (5
2) and second abutting end (36
2);
-at the parts (34 of first conductor
1) abutting end (36
1) the level height place, make the parts (34 of this first conductor
1) distortion;
-make this two abutting ends (36
1, 36
2) fixing, two parts of described conductor (34) form rectangle loop (24) roughly thus.
12, assembly method according to claim 11, described two abutting ends (36
1, 36
2) fixing realize by welding.
13, according to a described method in claim 11 or 12, wherein, at second parts (34 that insert conductor
2) before, at first parts (34 of conductor
1) on carry out the distortion of the parts of first conductor.
14, according to a described method in the claim 11 to 13, comprise, before described abutting end is fixing, carry out the distortion of each parts of first conductor at the level height place of the abutting end of each parts of first conductor.
15, according to a described method in the claim 11 to 14, the distortion of the parts of first conductor (34) realizes by the bending in advance that increases the weight of described parts.
16, a kind of method that is used to assemble mutual inductor unit (8), wherein this mutual inductor unit comprises a plurality of magnetic circuits (12), the secondary winding (16) that described magnetic circuit is accommodated in the housing (20) partly centers on, this housing is provided with the passage (22) that passes described magnetic circuit (12), described method comprises, each Primary Conductor (14) to described unit repeats according to one in the claim 11 to 15 described each step that is used for the method for assembling element (10), so that described conductor is installed simultaneously.
17, a kind of method that is used to assemble electronic tripping device, this method comprise carries out according to after one the assembling in the claim 11 to 16, and the housing of electronic module (7) is clamped on unit (8) or the inverting element (10).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0800131A FR2926393B1 (en) | 2008-01-10 | 2008-01-10 | TRANSFORMATION BLOCK OF A DOUBLE-PASSING ELECTRONIC TRIGGER |
| FR0800131 | 2008-01-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101552127A true CN101552127A (en) | 2009-10-07 |
| CN101552127B CN101552127B (en) | 2012-11-28 |
Family
ID=39683459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100023943A Active CN101552127B (en) | 2008-01-10 | 2009-01-12 | Mutual inductor unit with twice through electronic tripping device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101552127B (en) |
| FR (1) | FR2926393B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102290292A (en) * | 2011-06-28 | 2011-12-21 | 常熟开关制造有限公司(原常熟开关厂） | Aftercurrent protection circuit breaker |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10923322B2 (en) | 2017-06-14 | 2021-02-16 | Lam Research Corporation | Articulated direct-mount inductor and associated systems and methods |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2717417C2 (en) * | 1977-04-20 | 1986-01-30 | Condor-Werk Gebr. Frede KG Elektro- und Maschinenfabrik, 4722 Ennigerloh | Method and device for the production of the primary winding of summation current transformers in multi-phase execution |
| FR2696275B1 (en) * | 1992-09-28 | 1994-10-28 | Merlin Gerin | Molded case circuit breaker with interchangeable trip units. |
| FR2701335B1 (en) * | 1993-02-09 | 1995-04-14 | Merlin Gerin | Differential protection block with testable functional sub-assembly. |
| US6242993B1 (en) * | 1995-03-13 | 2001-06-05 | Square D Company | Apparatus for use in arcing fault detection systems |
| US6191947B1 (en) * | 1998-09-28 | 2001-02-20 | Siemens Energy & Automation, Inc. | Electronic trip unit and mounting method |
| DE29917174U1 (en) * | 1999-09-30 | 2000-01-13 | Abb Patent Gmbh | Electronic overload relay |
| MXPA00012699A (en) * | 1999-12-27 | 2003-04-25 | Gen Electric | Electronic trip unit with a rating plug for circuit. |
-
2008
- 2008-01-10 FR FR0800131A patent/FR2926393B1/en active Active
-
2009
- 2009-01-12 CN CN2009100023943A patent/CN101552127B/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102290292A (en) * | 2011-06-28 | 2011-12-21 | 常熟开关制造有限公司(原常熟开关厂） | Aftercurrent protection circuit breaker |
| CN102290292B (en) * | 2011-06-28 | 2012-11-07 | 常熟开关制造有限公司(原常熟开关厂） | Aftercurrent protection circuit breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101552127B (en) | 2012-11-28 |
| FR2926393A1 (en) | 2009-07-17 |
| FR2926393B1 (en) | 2009-12-18 |
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