EP2378528B1 - Current transformer module for a bus-enabled installation device - Google Patents

Current transformer module for a bus-enabled installation device Download PDF

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Publication number
EP2378528B1
EP2378528B1 EP11002444.5A EP11002444A EP2378528B1 EP 2378528 B1 EP2378528 B1 EP 2378528B1 EP 11002444 A EP11002444 A EP 11002444A EP 2378528 B1 EP2378528 B1 EP 2378528B1
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EP
European Patent Office
Prior art keywords
current transformer
base
transformer module
toroidal core
core winding
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.)
Active
Application number
EP11002444.5A
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German (de)
French (fr)
Other versions
EP2378528A2 (en
EP2378528A3 (en
Inventor
Robert Dipl.-Ing. Schramm
Peter Dipl.-Ing. Heilig
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ABB AG Germany
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ABB AG Germany
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Publication of EP2378528A2 publication Critical patent/EP2378528A2/en
Publication of EP2378528A3 publication Critical patent/EP2378528A3/en
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Publication of EP2378528B1 publication Critical patent/EP2378528B1/en
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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
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings
    • H01F27/027—Casings specially adapted for combination of signal type inductors or transformers with electronic circuits, e.g. mounting on printed circuit boards
    • 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
    • H01F27/24—Magnetic cores
    • H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
    • H01F27/266—Fastening or mounting the core on casing or support
    • 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
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • H01F27/306—Fastening or mounting coils or windings on core, casing or other support
    • 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
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
    • 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
    • H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
    • H01F2027/065—Mounting on printed circuit boards
    • 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

Definitions

  • the invention relates to a current transformer module for a bus-capable installation device, with a base in which a secondary circuit of the current transformer forming ring core winding is arranged with terminals, wherein a primary circuit of the current transformer forming insulated wire is passed through the toroidal core, wherein an entry of the entry of the insulated wire is set in the ring of the toroidal core winding and an exit point of the exit of the insulated wire from the ring of the toroidal core winding, and the insulated wire is stripped at its ends, so that free ends are formed, according to the preamble of claim 1.
  • a bus-capable installation device in particular a switching actuator, with a circuit board, on which a current transformer module is placed, according to the preamble of claim 10.
  • a bus-capable control device for controlling at least one consumer in a bus-oriented programmable electrical installation is known, with a bus connection device for connecting the control unit to a bus system, and with a control device for controlling or switching the connected to the control device consumer, and with a detection device for detecting the Electricity and the consumer, so a current transformer module.
  • a current transformer module is understood to be a prefabricatable unit of a current transformer in a housing.
  • EP 1 743 180 A1 is a device terminal for the electrical connection of electrical cables to existing in an electrical device contacts known, in which a current transformer is integrated.
  • Other current transformer modules are also from the DE 10 2007 937 058 A1 and US Pat. No. 6,753,749 B1 known.
  • EP 1 743 180 A1 and US Pat. No. 6,753,749 B1 disclose a current transformer module according to the preamble of claim 1.
  • a secondary circuit of such a current transformer typically comprises a ring winding, also called ring core.
  • the primary circuit of the current transformer is a wire which is passed through the ring winding.
  • the ring winding is usually made of enameled wire, which is not considered isolated for legal requirements.
  • the wire forming the primary circuit is usually sufficiently insulated. Adhere to certain minimum distances between the stripped, free ends of the primary circular wire to the ring winding.
  • the object with regard to the creation of a current transformer module for a bus-capable installation device is achieved by a current transformer module having the features of claim 1.
  • the object with regard to the creation of a bus-compatible installation device with a current transformer is achieved by a bus-capable installation device according to claim 10.
  • the base is cup-shaped and has a bottom plate, broad sides and narrow sides
  • the insulated wire forming the primary circuit is from a first, free end to the entry point on a first broad side of the outer wall of the base and from the exit point to a second, free End led to a second, opposite broad side of the outer wall of the base, and the terminals of the toroidal core winding are led away via an insulated connecting wire from the base, so that the connecting wires are remote from the base connected to a circuit board.
  • the insulated wire forming the primary circuit is designed as a double wire, comprising two insulated individual wires lying side by side.
  • the width of the wire forming the primary circuit can be made small, and at the same time, the required total conductor cross section is achieved to ensure a high current carrying capacity. Because of the primary circuit forming insulated wire should lie flat against the outer wall of the base and not protrude far, because the current transformer module is to install in the bus-compatible installation device in a very confined installation space. In addition, two thinner wires are easier to bend than a thicker wire.
  • the individual wires are provided with a three-layer insulation layer.
  • This can be formed for example from a designated TEX-E material. This achieves an insulation resistance of up to 4 kV.
  • the secondary-side insulated connecting wires are provided with a triple insulation.
  • the toroidal core winding has at least 1000 turns. This achieves a high inductance of the toroidal core winding. The advantage of this is that a low temperature sensitivity of the current measurement is achieved.
  • the toroidal core winding is surrounded by a foil strip as additional insulation.
  • This foil strip can be applied to the outer circumferential surface of the toroidal toroidal core winding. It is so thin that it takes up little space, but yet causes an additional insulation of the toroidal winding and beyond also a mechanical protection of the same.
  • the current transformer module comprises a housing in a base construction, formed from the base and a cover having a bottom plate of the base opposite cover plate.
  • the first, free end of the insulated wire at a first connection point and the second, free end of the insulated wire at a second connection point project beyond the base plate of the base, wherein both connection points are located near a first narrow side of the base.
  • the current transformer module can be soldered on the primary side with a circuit board.
  • connecting webs are formed on the base, which carry the terminals of the toroidal core winding, wherein the connecting webs near a second narrow side of the base, which is opposite to the first narrow side, are arranged. In this way, the required and legally prescribed air gap between the primary-side and the secondary-side connection arises.
  • the secondary-side insulated connecting wire emerges from the housing at an outlet opening, wherein the outlet opening is formed opposite the first or second connection location in the cover.
  • the outlet opening is inclined to lie above the terminals of the toroidal core winding, and in the interior of the housing, a further air gap between the terminals of the toroidal core winding and the outlet opening is formed.
  • a bus-compatible installation device can be, in particular, a switching actuator, with a printed circuit board, to which a current transformer module is attached as described above.
  • the current transformer module of an actuator assembly is arranged adjacent, and the primary-side free terminal ends are electrically connected to the mounting location of the current transformer on the board with this, for example, soldered.
  • the secondary-side insulated connection wire is electrically connected to the circuit board on a side of the actuator assembly opposite to the current transformer module, for example with a plug connector.
  • FIG. 1 shows a power conversion module 10 including a pedestal-type housing 24 formed of a pedestal 20 and a cover 21.
  • the base 20 is cup-shaped or trough-shaped and has a bottom plate 201, two parallel spaced broad sides, of which only one broad side 202 is visible, and a first and a second narrow side 203, 203 '.
  • the pedestal is open at the top.
  • the cover 21 is formed as an inverted cup and has a cover plate 204 and also two broad sides and two narrow sides. In order to close the housing 24, the cover 204 is slipped over the base 20 from above. In the presentation of the Fig. 1 the cover 204 is shown transparent. Cover 204 and base 20 are usually made of an insulating plastic.
  • the cover 204 and the base 20 are on the narrow sides 203, 203 'via a respective latching lug 205 which is attached to the narrow side and is in engagement with a detent opening in the narrow side of the cover, locked together.
  • the interior of the trough-shaped base 20 forms a holding region for the toroidal core winding 11.
  • the holding area is dimensioned so that the toroidal core winding is firmly held even if it is not glued or cast. However, it can also be glued for the purpose of better stability.
  • the toroidal coil 11 typically includes a solid structure (not shown) about which a wire (also not shown in detail) is wound. Here are about 1000 turns.
  • an inner space 11 'of the ring core winding 11 is defined by annular diameter, which allows the passage of a primary circuit wire 12 through.
  • the inner space 11 ' may additionally be filled with a potting compound (not shown), by which the primary circuit wire 12 is fixed in the interior.
  • the primary circuit wire 12 is formed as a double wire and comprises two parallel juxtaposed and juxtaposed insulated individual wires 13, 13 '.
  • the individual wires 13, 13' guided in a straight line.
  • the individual wires 13, 13 ' are further guided so that they are bent from a predetermined point 16 outside of the toroidal core winding 11 by 90 ° and then guided in a different direction.
  • This point 16 is referred to as the entry point of the primary circuit wire 12, since the primary circuit wire 12 enters the interior of the toroidal core winding 11 there.
  • FIG. 1 due to the perspective view hidden, corresponding location, which is referred to as the exit point and where the wire exits from the interior of the toroidal coil 11 again.
  • Each of the isolated individual wires 13, 13 ' has two free ends 14, at which it is stripped, to the board 30 (see Fig. 2 ) of a bus-compatible installation device to be soldered.
  • each insulated individual wire 13, 13 ' is guided on the outside on a broad side 202 of the base 20.
  • In the broad side 202 of the base 20 are to guide grooves 206 for leading recording of the isolated individual wires 13, 13 '.
  • the depth of the guide grooves 206 is dimensioned so that it corresponds approximately to the diameter of an insulated individual wire 13, 13 '.
  • the two individual wires 13, 13 ' are fitted side by side in the guide channel 206 so that the insulating individual wires 13, 13' hardly protrude perpendicularly over the broad side 202.
  • the individual wires 13, 13 'thus bring no additional width to the current transformer module and the cover 21 can be pushed without it protruding laterally.
  • Corresponding recesses may also be present in the interior of the broad sides of the cover in order to accommodate the small but projecting parts of the insulation of the two insulating individual wires 13, 13 '.
  • Each of the insulating individual wires is provided with a triple insulating layer and withstands at least a voltage of 4 kV. Both individual wires 13, 13 'taken together represent a conductor cross-section of 1.5 mm 2 , which is sufficient for a maximum measuring current of 20 A.
  • the insulating individual wires 13, 13 ' extending from a junction 26 near the first narrow side 203 obliquely up to the entrance 16.
  • the distance between the junction 26 and the entry point 16 is at least as large as the statutory minimum air gap between the free end of the primary circuit wire 12 and the toroidal core winding 11. This may correspond, for example, with a required insulation strength of 4 kV an air and creepage distance of 6mm.
  • connecting webs 23, 23 ' which carry the terminals 18, 18' of the toroidal core winding 11, wherein the connecting webs 23, 23 'near a second narrow side 203' of the base 20, the first narrow side 203 with the first connection point 26 is opposite, are arranged.
  • the toroidal core winding is wound spirally around the connecting webs 23, 23 'up to a respective connection point 18, 18' at the upper end of each of the connecting webs 23, 23 '. There, the toroidal core winding, each with a connecting wire 19, 19 'soldered.
  • the connecting wires 19, 19 ' are guided above the toroidal core winding 11 transversely through the free space in the upper half of the housing up to the first narrow side 203, where they emerge from the housing 24 through a respective outlet opening 25, 25' in the cover 21.
  • the Length of the distance between the connection points 18, 18 'and the outlet openings 25, 25' is also at least as large as the legally prescribed air gap, for example, again at least 6 mm long.
  • a plug 207 is attached, with which the connecting wires 19, 19' on the board 30 (see Fig. 2 ) away from the power converter module 10 can be connected to a corresponding socket.
  • the connecting wires 19, 19 ' are triple insulated.
  • the shown current transformer has a low temperature sensitivity and a high measuring accuracy due to its illustrated design, even with small measuring currents, for example in the range up to 100mA with a maximum measuring span up to 20A.
  • the design as a toroidal transformer is a closed circle, therefore results in a very low influenceability by external extraneous fields and a very low generation of stray flux through the toroidal transformer itself. This makes it possible in a series mounting several channels on a circuit board in a bus-compatible installation device several To place current transformer modules close to each other, without these mutually influence each other.
  • FIG. 2 Schematically, this is in Fig. 2 shown.
  • a current transformer module 10 according to the invention is arranged lying close to an actuator assembly 32 per channel.
  • conductor tracks that run on the underside of the board 30, dashed lines drawn.
  • a first conductor 36 connects a first connection terminal 34 'to a first connection pin of the actuator assembly 32.
  • a second conductor 36' connects a second connection terminal 34 "to the first primary-side connection 26 of the current transformer module 10, and to the second primary-side connection 26 'of the current transformer module 10 From the outlet openings 25, 25 'of the housing of the current transformer module 10 lead the two insulated leads 19, 19' past the actuator assembly to the bus terminal side 35 of the board 30, where the plug 207 is received in a receptacle for the purpose of electrical connection.
  • the switch actuator assembly 32 has a galvanic isolation between its load and her bus side. By removing the secondary-side connections of the toroidal coil of the current transformer module 10 by means of the insulated connection wires 19, 19 'on the bus side of the board, the potential separation on the circuit board 30 is ensured.
  • the first, primary-side connection points 26, 26 'and the outlet openings 25, 25' for the secondary-side connection wires 19, 19 'in the longitudinal direction of the current transformer module are close to each other. Due to the internal structure of the current transformer module 10 described above, nevertheless, all prescribed clearances and creepage distances are maintained, and this with an overall very compact design of the current transformer module 10. This can be easily assembled as a prefabricated module on the board. You can also see in the Fig. 2 in that the current transformer module can be set very close to the actuator assembly 32 and to current transformers 10 'of adjacent channels.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transformers For Measuring Instruments (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Description

Die Erfindung betrifft ein Stromwandlermodul für ein busfähiges Installationsgerät, mit einem Sockel, in dem eine einen Sekundärkreis des Stromwandlers bildende Ringkernwicklung mit Anschlüssen angeordnet ist, wobei durch die Ringkernwicklung hindurch ein einen Primärkreis des Stromwandlers bildender isolierter Draht geführt ist, wobei ein Eintrittsort des Eintritts des isolierten Drahtes in den Ring der Ringkernwicklung und ein Austrittsort des Austritts des isolierten Drahtes aus dem Ring der Ringkernwicklung festgelegt ist, und der isolierte Draht an seinen Enden abisoliert ist, so dass freie Enden gebildet sind, gemäß dem Oberbegriff des Anspruchs 1. Die Erfindung betrifft weiter ein busfähiges Installationsgerät, insbesondere einen Schaltaktor, mit einer Platine, auf die ein Stromwandlermodul aufgesetzt ist, gemäß dem Oberbegriff des Anspruchs 10.
Aus der DE 10 2009 048 935 A1 ist ein busfähiges Steuerungsgerät zur Steuerung mindestens eines Verbrauchers in einer busorientierten programmierbaren Elektroinstallation bekannt, mit einer Busanschlusseinrichtung zum Anschluss des Steuergerätes an ein Bussystem, und mit einer Steuerungseinrichtung zum Steuern bzw. Schalten des an das Steuerungsgerät angeschlossenen Verbrauchers, und mit einer Erfassungseinrichtung zum Erfassen des Stromes und des Verbrauchers, also eines Stromwandlermoduls. Über die Ausgestaltung des Stromwandlermoduls ist nichts offenbart.
Unter Stromwandlermodul wird eine vorfertigbare Einheit aus einem Stromwandler in einem Gehäuse verstanden.
Aus der EP 1 743 180 A1 ist eine Geräteklemme für den elektrischen Anschluss von elektrischen Leitungen an in einem elektrischen Gerät vorhandene Kontaktierungen bekannt, in die ein Stromwandler integriert ist.
Weitere Stromwandlermodule sind auch aus der DE 10 2007 937 058 A1 und US 6 753 749 B1 bekannt. EP 1 743 180 A1 und US 6,753,749 B1 offenbaren ein Stromwandlermodul gemäß Oberbegriff von Anspruch 1.The invention relates to a current transformer module for a bus-capable installation device, with a base in which a secondary circuit of the current transformer forming ring core winding is arranged with terminals, wherein a primary circuit of the current transformer forming insulated wire is passed through the toroidal core, wherein an entry of the entry of the insulated wire is set in the ring of the toroidal core winding and an exit point of the exit of the insulated wire from the ring of the toroidal core winding, and the insulated wire is stripped at its ends, so that free ends are formed, according to the preamble of claim 1. The invention Furthermore, a bus-capable installation device, in particular a switching actuator, with a circuit board, on which a current transformer module is placed, according to the preamble of claim 10.
From the DE 10 2009 048 935 A1 a bus-capable control device for controlling at least one consumer in a bus-oriented programmable electrical installation is known, with a bus connection device for connecting the control unit to a bus system, and with a control device for controlling or switching the connected to the control device consumer, and with a detection device for detecting the Electricity and the consumer, so a current transformer module. Nothing is disclosed about the configuration of the current transformer module.
A current transformer module is understood to be a prefabricatable unit of a current transformer in a housing.
From the EP 1 743 180 A1 is a device terminal for the electrical connection of electrical cables to existing in an electrical device contacts known, in which a current transformer is integrated.
Other current transformer modules are also from the DE 10 2007 937 058 A1 and US Pat. No. 6,753,749 B1 known. EP 1 743 180 A1 and US Pat. No. 6,753,749 B1 disclose a current transformer module according to the preamble of claim 1.

Bekannt sind Stromwandler vom Typ Ringkernwandler. Ein Sekundärkreis eines solchen Stromwandlers umfasst typischerweise eine Ringwicklung, auch Ringkern genannt. Der Primärkreis des Stromwandlers ist ein Draht, der durch die Ringwicklung hindurchgeführt wird.Current transformers of the toroidal core type are known. A secondary circuit of such a current transformer typically comprises a ring winding, also called ring core. The primary circuit of the current transformer is a wire which is passed through the ring winding.

Aufgrund gesetzlicher Erfordernisse sind bei der Ausgestaltung des Stromwandlers vorbestimmte Luft- und Kriechstrecken einzuhalten, etwa zwischen dem primär- und dem sekundärseitigen Anschluss oder zwischen dem primärseitigen Anschluss und der Ringwicklung. Die Ringwicklung besteht üblicherweise aus Lackdraht, der für die gesetzlichen Vorgaben als nicht isoliert gilt. Der den Primärkreis bildende Draht hingegen ist üblicherweise ausreichend isoliert. Einzuhalten sind bestimmte Mindestabstände zwischen den abisolierten, freien Enden des Primärkreisdrahts zur Ringwicklung.Due to legal requirements are in the design of the current transformer predetermined clearance and creepage distances to be met, such as between the primary and the secondary side terminal or between the primary-side terminal and the ring winding. The ring winding is usually made of enameled wire, which is not considered isolated for legal requirements. By contrast, the wire forming the primary circuit is usually sufficiently insulated. Adhere to certain minimum distances between the stripped, free ends of the primary circular wire to the ring winding.

Der Nachteil dieser Erfordernisse ist, dass relativ viel Platz auf der Platine des Installationsgerätes, in das der Stromwandler eingebaut werden soll, für den Stromwandler zur Verfügung gestellt werden muss. Zumeist wird deshalb kein Stromwandlermodul verwendet, sondern der Stromwandler wird ohne Gehäuse von Hand auf der Platine montiert, indem die Anschlüsse für die Primär- und Sekundärseite auf der Platine aufgelötet werden. Hierbei können die gesetzlichen Vorgaben bezüglich der Luft- und Kriechstrecken nur durch geeignete Maßnahmen beim Entwurf der Leiterbahnführung auf der Platine erfüllt werden. Soll der Stromwandler jedoch zur Messung hoher Ströme geeignet sein, so müssen die Leiterbahnen auf der Platine entsprechend breit ausgeführt sein, um die geforderte hohe Stromtragfähigkeit zu gewährleisten. Um die gesetzlich geforderten Luft- und Kriechstrecken einzuhalten, ist dann ein erhöhter Platzbedarf erforderlich, beziehungsweise, wenn dieser erhöhte Platzbedarf aus konstruktiven Gründen nicht zur Verfügung gestellt werden kann, ist die Einhaltung der Luft- und Kriechstrecken bei hohen Stromstärken nicht möglich.The disadvantage of these requirements is that a relatively large amount of space on the board of the installation device, in which the current transformer is to be installed, must be provided for the current transformer. In most cases, therefore, no current transformer module is used, but the current transformer is mounted without housing by hand on the board by the terminals for the primary and secondary side are soldered to the board. In this case, the legal requirements with respect to clearances and creepage distances can only be fulfilled by suitable measures when designing the track guidance on the board. However, if the current transformer is to be suitable for measuring high currents, the printed conductors on the printed circuit board must be correspondingly wide in order to ensure the required high current carrying capacity. In order to comply with the legally required clearances and creepage distances, then an increased space requirement is required, or if this increased space requirement for design reasons can not be provided, compliance with the creepage distances and creepage distances at high currents is not possible.

Es ist daher die Aufgabe der vorliegenden Erfindung, ein Stromwandlermodul nach dem Oberbegriff von Patentanspruch 1 dahingehend weiter zu bilden, dass es bei Erfüllung der gesetzlichen Vorgaben betreffend der Luft- und Kriechstrecken besonders Platz sparend und kompakt gebaut ist.It is therefore an object of the present invention to further develop a current transformer module according to the preamble of claim 1 further that it is particularly space-saving and compact built in compliance with legal requirements regarding the creepage distances and creepage distances.

Es ist weiterhin die Aufgabe der vorliegenden Erfindung, ein busfähiges Installationsgerät mit einem Stromwandler zu schaffen, bei dem der Stromwandler und die übrigen Komponenten unter Einhaltung der gesetzlich vorgeschriebenen Luft- und Kriechstrecken platzsparend auf einer Platine des Installationsgerätes montiert werden können.It is a further object of the present invention to provide a bus-capable installation device with a current transformer, in which the current transformer and the other components can be mounted in a space-saving manner on a circuit board of the installation device in compliance with the legally prescribed clearances and creepage distances.

Die Aufgabe bezüglich der Schaffung eines Stromwandlermoduls für ein busfähiges Installationsgerät wird durch ein Stromwandlermodul mit den Merkmalen des Anspruchs 1 gelöst.
Die Aufgabe bezüglich der Schaffung eines busfähigen Installationsgerätes mit einem Stromwandler wird durch ein busfähiges Installationsgerät nach Anspruch 10 gelöst.
Erfindungsgemäß ist der Sockel napfförmig ausgebildet und weist eine Bodenplatte, Breitseiten und Schmalseiten auf, und der den Primärkreis bildende isolierte Draht ist von einem ersten, freien Ende bis zum Eintrittsort an einer ersten Breitseite der Außenwand des Sockels und von dem Austrittsort zu einem zweiten, freien Ende an einer zweiten, gegenüberliegenden Breitseite der Außenwand des Sockels geführt, und die Anschlüsse der Ringkernwicklung sind über je einen isolierten Anschlussdraht von dem Sockel weggeführt, so dass die Anschlussdrähte entfernt von dem Sockel mit einer Platine verbindbar sind. Die Aufnahme der Ringkernwicklung in dem napfförmigen Sockel, man kann auch von einem wannenförmigen Sockel sprechen, und die Führung des den Primärkreis führenden isolierten Drahtes entlang der Außenwand des Sockels erhöht die Luft- und Kriechstrecke zwischen den abisolierten Enden dieses Drahtes und der Ringkernwicklung, ohne dass eine größere räumliche Ausdehnung des Stromwandlermoduls erforderlich ist. Dadurch, dass der Sekundäranschluss über einen isolierten Draht zu einem Anschlusspunkt entfernt von dem Sockel geführt werden kann, ist auch die Einhaltung der geforderten Luft- und Kriechstrecke zwischen dem primär- und dem sekundärseitigen Anschluss möglich, bei gleichzeitig kompaktem Aufbau des Stromwandlermoduls.
Gemäß einer vorteilhaften Ausführungsform der Erfindung ist der den Primärkreis bildende isolierte Draht als Doppeldraht ausgebildet, umfassend zwei nebeneinander liegende isolierte Einzeldrähte. Dadurch kann die Breite des den Primärkreis bildenden Drahtes gering gehalten werden, und gleichzeitig wird der erforderliche Gesamt-Leiterquerschnitt erreicht, um eine hohe Stromtragfähigkeit sicherzustellen. Denn der den Primärkreis bildende isolierte Draht soll flach an der Außenwand des Sockels anliegen und nicht weit abstehen, denn das Stromwandlermodul ist in dem busfähigen Installationsgerät in sehr beengtem Einbauraum anzubringen. Außerdem sind zwei dünnere Drähte leichter zu biegen als ein dickerer Draht.The object with regard to the creation of a current transformer module for a bus-capable installation device is achieved by a current transformer module having the features of claim 1.
The object with regard to the creation of a bus-compatible installation device with a current transformer is achieved by a bus-capable installation device according to claim 10.
According to the invention, the base is cup-shaped and has a bottom plate, broad sides and narrow sides, and the insulated wire forming the primary circuit is from a first, free end to the entry point on a first broad side of the outer wall of the base and from the exit point to a second, free End led to a second, opposite broad side of the outer wall of the base, and the terminals of the toroidal core winding are led away via an insulated connecting wire from the base, so that the connecting wires are remote from the base connected to a circuit board. The inclusion of the toroidal core winding in the cup-shaped base, one can also speak of a trough-shaped base, and the leadership of the primary circuit leading insulated wire along the outer wall of the base increases the creepage distance between the stripped ends of this wire and the toroidal winding, without a larger spatial extent of the current transformer module is required. The fact that the secondary connection can be performed via an insulated wire to a connection point away from the base, the compliance of the required air and creepage distance between the primary and the secondary side connection is possible, while compact design of the current transformer module.
According to an advantageous embodiment of the invention, the insulated wire forming the primary circuit is designed as a double wire, comprising two insulated individual wires lying side by side. Thereby, the width of the wire forming the primary circuit can be made small, and at the same time, the required total conductor cross section is achieved to ensure a high current carrying capacity. Because of the primary circuit forming insulated wire should lie flat against the outer wall of the base and not protrude far, because the current transformer module is to install in the bus-compatible installation device in a very confined installation space. In addition, two thinner wires are easier to bend than a thicker wire.

Gemäß einer vorteilhaften Ausführungsform der Erfindung sind die Einzeldrähte mit einer dreilagigen Isolationsschicht versehen. Diese kann beispielsweise aus einem als TEX-E bezeichneten Material gebildet sein. Damit ist eine Isolationsfestigkeit bis 4 kV erreichbar.According to an advantageous embodiment of the invention, the individual wires are provided with a three-layer insulation layer. This can be formed for example from a designated TEX-E material. This achieves an insulation resistance of up to 4 kV.

Gemäß einer weiteren vorteilhaften Ausführungsform der Erfindung sind auch die sekundärseitigen isolierten Anschlussdrähte mit einer dreifachen Isolierung versehen.According to a further advantageous embodiment of the invention, the secondary-side insulated connecting wires are provided with a triple insulation.

Gemäß einer vorteilhaften Ausführungsform der Erfindung weist die Ringkernwicklung wenigstens 1000 Windungen auf. Dadurch erzielt man eine hohe Induktivität der Ringkernwicklung. Der Vorteil dabei ist, dass eine niedrige Temperaturempfindlichkeit der Strommessung erreicht wird.According to an advantageous embodiment of the invention, the toroidal core winding has at least 1000 turns. This achieves a high inductance of the toroidal core winding. The advantage of this is that a low temperature sensitivity of the current measurement is achieved.

Gemäß einer vorteilhaften Ausführungsform der Erfindung ist die Ringkernwicklung mit einem Folienband als zusätzlicher Isolierung umgeben. Dieses Folienband kann auf der äußeren Mantelfläche der torusförmigen Ringkernwicklung aufgebracht sein. Es ist so dünn, dass es kaum Platz beansprucht, aber doch eine zusätzliche Isolierung der Ringkernwicklung und darüber hinaus auch einen mechanischen Schutz derselben bewirkt.According to an advantageous embodiment of the invention, the toroidal core winding is surrounded by a foil strip as additional insulation. This foil strip can be applied to the outer circumferential surface of the toroidal toroidal core winding. It is so thin that it takes up little space, but yet causes an additional insulation of the toroidal winding and beyond also a mechanical protection of the same.

Gemäß einer vorteilhaften Ausführungsform der Erfindung umfasst der Stromwandlermodul ein Gehäuse in Sockelbauweise, gebildet aus dem Sockel und einer Abdeckung, die eine der Bodenplatte des Sockels gegenüberliegende Deckplatte aufweist.According to an advantageous embodiment of the invention, the current transformer module comprises a housing in a base construction, formed from the base and a cover having a bottom plate of the base opposite cover plate.

Gemäß einer vorteilhaften Ausführungsform der Erfindung überragen das erste, freie Ende des isolierten Drahtes an einer ersten Anschlussstelle und das zweite, freie Ende des isolierten Drahtes an einer zweiten Anschlussstelle die Bodenplatte des Sockels, wobei beide Anschlussstellen nahe einer ersten Schmalseite des Sockels gelegen sind. An der ersten und der zweiten Anschlussstelle kann der Stromwandlermodul primärseitig mit einer Platine verlötet werden.According to an advantageous embodiment of the invention, the first, free end of the insulated wire at a first connection point and the second, free end of the insulated wire at a second connection point project beyond the base plate of the base, wherein both connection points are located near a first narrow side of the base. At the first and the second connection point, the current transformer module can be soldered on the primary side with a circuit board.

Gemäß einer vorteilhaften Ausführungsform der Erfindung sind an dem Sockel Anschlussstege gebildet, die die Anschlüsse der Ringkernwicklung tragen, wobei die Anschlussstege nahe einer zweiten Schmalseite des Sockels, die der ersten Schmalseite gegenüberliegt, angeordnet sind. Auf diese Weise entsteht die erforderliche und gesetzlich vorgeschriebene Luftstrecke zwischen dem primärseitigen und dem sekundärseitigen Anschluss.According to an advantageous embodiment of the invention, connecting webs are formed on the base, which carry the terminals of the toroidal core winding, wherein the connecting webs near a second narrow side of the base, which is opposite to the first narrow side, are arranged. In this way, the required and legally prescribed air gap between the primary-side and the secondary-side connection arises.

Gemäß einer vorteilhaften Ausführungsform der Erfindung tritt der sekundärseitige isolierte Anschlussdraht an einer Austrittsöffnung aus dem Gehäuse aus, wobei die Austrittsöffnung gegenüber der ersten bzw. zweiten Anschlussstelle in der Abdeckung ausgebildet ist. Dadurch kommt die Austrittsöffnung schräg oberhalb der Anschlüsse der Ringkernwicklung zu liegen, und im Inneren des Gehäuses ist eine weitere Luftstrecke zwischen den Anschlüssen der Ringkernwicklung und der Austrittsöffnung gebildet.According to an advantageous embodiment of the invention, the secondary-side insulated connecting wire emerges from the housing at an outlet opening, wherein the outlet opening is formed opposite the first or second connection location in the cover. As a result, the outlet opening is inclined to lie above the terminals of the toroidal core winding, and in the interior of the housing, a further air gap between the terminals of the toroidal core winding and the outlet opening is formed.

Ein erfindungsgemäßes busfähiges Installationsgerät kann insbesondere ein Schaltaktor sein, mit einer Platine, auf die ein Stromwandlermodul wie oben beschrieben aufgesetzt ist. Dabei ist erfindungsgemäß der Stromwandlermodul einer Aktorbaugruppe benachbart angeordnet, und die primärseitigen freien Anschlussenden sind am Befestigungsort des Stromwandlers auf der Platine mit dieser elektrisch verbunden, beispielsweise aufgelötet. Der sekundärseitige isolierte Anschlussdraht ist an einer dem Stromwandlermodul gegenüberliegenden Seite der Aktorbaugruppe mit der Platine elektrisch verbunden, beispielsweise mit einem Steckverbinder. Der Vorteil dieser Gestaltung eines busfähigen Installationsgerätes liegt darin, dass der Stromwandlermodul sehr nahe an die Aktorbaugruppe herangesetzt werden kann, was Platz spart, und gleichzeitig eine Potentialtrennung auf der Platine zwischen dem primärseitigen und dem sekundärseitigen Anschluss des Stromwandlers erreicht ist.A bus-compatible installation device according to the invention can be, in particular, a switching actuator, with a printed circuit board, to which a current transformer module is attached as described above. In this case, according to the invention, the current transformer module of an actuator assembly is arranged adjacent, and the primary-side free terminal ends are electrically connected to the mounting location of the current transformer on the board with this, for example, soldered. The secondary-side insulated connection wire is electrically connected to the circuit board on a side of the actuator assembly opposite to the current transformer module, for example with a plug connector. The advantage of this design of a bus-compatible installation device is that the current transformer module can be set very close to the actuator assembly, which saves space, and at the same time a potential separation is achieved on the board between the primary side and the secondary side terminal of the current transformer.

Figurenbeschreibungfigure description

Figuren und Beschreibung dienen dem besseren Verständnis des Gegenstands. Gegenstände oder Teile von Gegenständen, die im Wesentlichen gleich oder ähnlich sind, können mit denselben Bezugszeichen versehen sein. Die Figuren sind lediglich eine schematische Darstellung einer Ausführungsform der Erfindung.Figures and description serve to better understand the subject. Articles or parts of objects which are substantially the same or similar may be given the same reference numerals. The figures are merely a schematic representation of an embodiment of the invention.

Dabei zeigt:

Figur 1
eine perspektivische Ansicht eines erfindungsgemäßen Stromwandlermoduls, sowie
Figur 2
schematisch eine Aufsicht auf die Platine eines erfindungsgemäßen busfähigen Installationsgerätes
Showing:
FIG. 1
a perspective view of a current transformer module according to the invention, as well
FIG. 2
schematically a plan view of the board of a bus-compatible installation device according to the invention

Figur 1 zeigt ein Stromwandlermodul 10, das ein Gehäuse 24 in Sockelbauweise umfasst, welches aus einem Sockel 20 und einer Abdeckung 21 gebildet ist. Der Sockel 20 ist napf- oder wannenförmig gestaltet und hat eine Bodenplatte 201, zwei parallel voneinander beabstandete Breitseiten, von denen nur eine Breitseite 202 sichtbar ist, sowie eine erste und eine zweite Schmalseite 203, 203'. Nach oben ist der Sockel offen. Die Abdeckung 21 ist wie ein umgekehrter Napf ausgebildet und hat eine Deckplatte 204 sowie ebenfalls zwei Breitseiten und zwei Schmalseiten. Um das Gehäuse 24 zu schließen, wird die Abdeckung 204 von oben dem Sockel 20 übergestülpt. In der Darstellung der Fig. 1 ist die Abdeckung 204 transparent dargestellt. Abdeckung 204 und Sockel 20 bestehen üblicherweise aus einem isolierenden Kunststoff. Die Abdeckung 204 und der Sockel 20 sind an den Schmalseiten 203, 203' über jeweils eine Rastnase 205, die der Schmalseite angebracht ist und mit einer Rastöffnung in der Schmalseite der Abdeckung in Eingriff steht, miteinander verrastet. FIG. 1 FIG. 1 shows a power conversion module 10 including a pedestal-type housing 24 formed of a pedestal 20 and a cover 21. The base 20 is cup-shaped or trough-shaped and has a bottom plate 201, two parallel spaced broad sides, of which only one broad side 202 is visible, and a first and a second narrow side 203, 203 '. The pedestal is open at the top. The cover 21 is formed as an inverted cup and has a cover plate 204 and also two broad sides and two narrow sides. In order to close the housing 24, the cover 204 is slipped over the base 20 from above. In the presentation of the Fig. 1 the cover 204 is shown transparent. Cover 204 and base 20 are usually made of an insulating plastic. The cover 204 and the base 20 are on the narrow sides 203, 203 'via a respective latching lug 205 which is attached to the narrow side and is in engagement with a detent opening in the narrow side of the cover, locked together.

Das Innere des wannenförmigen Sockels 20 bildet einen Haltebereich für die Ringkernwicklung 11. Wenn das Gehäuse 24 geschlossen ist, umschließt es die Ringkernwicklung 11 vollständig. Der Haltebereich ist so dimensioniert, dass die Ringkernwicklung auch dann fest darin gehalten ist, wenn sie nicht verklebt oder eingegossen ist. Sie kann allerdings zum Zwecke der besseren Stabilität zusätzlich noch verklebt sein.The interior of the trough-shaped base 20 forms a holding region for the toroidal core winding 11. When the housing 24 is closed, it completely encloses the toroidal core winding 11. The holding area is dimensioned so that the toroidal core winding is firmly held even if it is not glued or cast. However, it can also be glued for the purpose of better stability.

Die Ringkernwicklung 11 umfasst typischerweise eine feste Struktur (nicht dargestellt), um die ein Draht (auch im Detail nicht dargestellt) gewickelt ist. Hier sind es etwa 1000 Windungen. Durch die feste Struktur ist ein Innenraum 11' der Ringkernwicklung 11 von ringförmigem Durchmesser definiert, der das Hindurchschieben eines Primärkreis-Drahtes 12 ermöglicht. Der Innenraum 11' kann zusätzlich mit einer Vergußmasse ausgefüllt sein (nicht dargestellt), durch die der Primärkreis-Draht 12 im Innenraum fixiert ist.The toroidal coil 11 typically includes a solid structure (not shown) about which a wire (also not shown in detail) is wound. Here are about 1000 turns. By the solid structure, an inner space 11 'of the ring core winding 11 is defined by annular diameter, which allows the passage of a primary circuit wire 12 through. The inner space 11 'may additionally be filled with a potting compound (not shown), by which the primary circuit wire 12 is fixed in the interior.

Vorliegend ist der Primärkreis-Draht 12 als Doppeldraht ausgebildet und umfasst zwei parallel nebeneinander liegende und nebeneinander verlaufende isolierte Einzeldrähte 13, 13'. Im Innenraum 11' der Ringkernwicklung 11 sind die Einzeldrähte 13, 13' geradlinig geführt. Die Einzeldrähte 13, 13' sind weiter so geführt, dass sie ab einer vorbestimmten Stelle 16 außerhalb der Ringkernwicklung 11 um 90° gebogen sind und dann in eine andere Richtung geführt sind. Diese Stelle 16 wird als Eintrittsort des Primärkreis-Drahtes 12 bezeichnet, da der Primärkreis-Draht 12 dort ins Innere der Ringkernwicklung 11 eintritt. Auf der gegenüberliegenden Seite gibt es einen, in der Figur 1 aufgrund der perspektivischen Darstellung verdeckten, entsprechenden Ort, der als Austrittsort bezeichnet wird und an dem der Draht wieder aus dem Innenraum der Ringkernwicklung 11 austritt.In the present case, the primary circuit wire 12 is formed as a double wire and comprises two parallel juxtaposed and juxtaposed insulated individual wires 13, 13 '. In the interior 11 'of the toroidal winding 11, the individual wires 13, 13' guided in a straight line. The individual wires 13, 13 'are further guided so that they are bent from a predetermined point 16 outside of the toroidal core winding 11 by 90 ° and then guided in a different direction. This point 16 is referred to as the entry point of the primary circuit wire 12, since the primary circuit wire 12 enters the interior of the toroidal core winding 11 there. On the opposite side there is one in which FIG. 1 due to the perspective view hidden, corresponding location, which is referred to as the exit point and where the wire exits from the interior of the toroidal coil 11 again.

Jeder der isolierten Einzeldrähte 13, 13' hat zwei freie Enden 14, an denen er abisoliert ist, um an der Platine 30 (siehe Fig. 2) eines busfähigen Installationsgerätes festgelötet zu werden. Von dem freien Ende 14 bis zu dem Eintritts- bzw. Austrittsort 16 ist jeder isolierte Einzeldraht 13, 13' außen an einer Breitseite 202 des Sockels 20 geführt. In der Breitseite 202 des Sockels 20 befinden sich dazu Führungsrinnen 206 zur führenden Aufnahme der isolierten Einzeldrähte 13, 13'. Die Tiefe der Führungsrinnen 206 ist so bemessen, dass sie in etwa dem Durchmesser eines isolierten Einzeldrahtes 13, 13' entspricht. Die beiden Einzeldrähte 13, 13' sind nebeneinander liegend in die Führungsrinne 206 eingepasst, so dass die isolierenden Einzeldrähte 13, 13' kaum senkrecht über die Breitseite 202 herausstehen. Die Einzeldrähte 13, 13' bringen somit keine zusätzliche Breite zu dem Stromwandlermodul und die Abdeckung 21 kann aufgeschoben werden, ohne dass sie seitlich absteht. Im Inneren der Breitseiten der Abdeckung können ebenfalls entsprechende Ausnehmungen vorhanden sein, um die geringen doch überstehenden Teile der Isolierung der beiden isolierenden Einzeldrähte 13, 13' aufzunehmen. Jeder der isolierenden Einzeldrähte ist mit einer dreifachen Isolierschicht versehen und hält mindestens eine Spannung von 4 kV aus. Beide Einzeldrähte 13, 13' zusammengenommen stellen einen Leiterquerschnitt von 1,5 mm2 dar, was für einen maximalen Messstrom von 20 A ausreichend ist.Each of the isolated individual wires 13, 13 'has two free ends 14, at which it is stripped, to the board 30 (see Fig. 2 ) of a bus-compatible installation device to be soldered. From the free end 14 to the entry or exit point 16, each insulated individual wire 13, 13 'is guided on the outside on a broad side 202 of the base 20. In the broad side 202 of the base 20 are to guide grooves 206 for leading recording of the isolated individual wires 13, 13 '. The depth of the guide grooves 206 is dimensioned so that it corresponds approximately to the diameter of an insulated individual wire 13, 13 '. The two individual wires 13, 13 'are fitted side by side in the guide channel 206 so that the insulating individual wires 13, 13' hardly protrude perpendicularly over the broad side 202. The individual wires 13, 13 'thus bring no additional width to the current transformer module and the cover 21 can be pushed without it protruding laterally. Corresponding recesses may also be present in the interior of the broad sides of the cover in order to accommodate the small but projecting parts of the insulation of the two insulating individual wires 13, 13 '. Each of the insulating individual wires is provided with a triple insulating layer and withstands at least a voltage of 4 kV. Both individual wires 13, 13 'taken together represent a conductor cross-section of 1.5 mm 2 , which is sufficient for a maximum measuring current of 20 A.

Die isolierenden Einzeldrähte 13, 13' verlaufen von einer Anschlussstelle 26 nahe der ersten Schmalseite 203 schräg nach oben bis zu dem Eintrittsort 16. Der Abstand zwischen der Anschlussstelle 26 und dem Eintrittsort 16 ist dabei mindestens so groß wie die gesetzlich vorgeschriebene Mindestluftstrecke zwischen dem freien Ende des Primärkreis-Drahtes 12 und der Ringkernwicklung 11. Diese kann beispielsweise bei einer geforderten Isolationsfestigkeit von 4 kV einer Luft- und Kriechstrecke von 6mm entsprechen.The insulating individual wires 13, 13 'extending from a junction 26 near the first narrow side 203 obliquely up to the entrance 16. The distance between the junction 26 and the entry point 16 is at least as large as the statutory minimum air gap between the free end of the primary circuit wire 12 and the toroidal core winding 11. This may correspond, for example, with a required insulation strength of 4 kV an air and creepage distance of 6mm.

An dem Sockel 20 sind Anschlussstege 23, 23' gebildet, die die Anschlüsse 18, 18' der Ringkernwicklung 11 tragen, wobei die Anschlussstege 23, 23' nahe einer zweiten Schmalseite 203' des Sockels 20, die der ersten Schmalseite 203 mit der ersten Anschlussstelle 26 gegenüberliegt, angeordnet sind. Die Ringkernwicklung ist spiralförmig um die Anschlussstege 23, 23' herumgewickelt bis zu je einer Anschlussstelle 18, 18' an dem oberen Ende jedes der Anschlussstege 23, 23'. Dort ist die Ringkernwicklung mit je einem Anschlussdraht 19, 19' verlötet. Die Anschlussdrähte 19, 19' sind oberhalb der Ringkernwicklung 11 quer durch den freien Raum in der oberen Gehäusehälfte bis zu der ersten Schmalseite 203 geführt, wo sie durch jeweils eine Austrittsöffnung 25, 25' in der Abdeckung 21 aus dem Gehäuse 24 austreten. Die Länge der Strecke zwischen den Anschlussstellen 18, 18' und den Austrittsöffnungen 25, 25' ist ebenfalls mindestens so groß wie die gesetzlich vorgeschriebene Luftstrecke, beispielsweise auch wieder mindestens 6 mm lang.On the base 20 connecting webs 23, 23 'are formed, which carry the terminals 18, 18' of the toroidal core winding 11, wherein the connecting webs 23, 23 'near a second narrow side 203' of the base 20, the first narrow side 203 with the first connection point 26 is opposite, are arranged. The toroidal core winding is wound spirally around the connecting webs 23, 23 'up to a respective connection point 18, 18' at the upper end of each of the connecting webs 23, 23 '. There, the toroidal core winding, each with a connecting wire 19, 19 'soldered. The connecting wires 19, 19 'are guided above the toroidal core winding 11 transversely through the free space in the upper half of the housing up to the first narrow side 203, where they emerge from the housing 24 through a respective outlet opening 25, 25' in the cover 21. The Length of the distance between the connection points 18, 18 'and the outlet openings 25, 25' is also at least as large as the legally prescribed air gap, for example, again at least 6 mm long.

An den freien Enden der Anschlussdrähte 19, 19' ist ein Stecker 207 angebracht, mit dem die Anschlussdrähte 19, 19' auf der Platine 30 (siehe Fig. 2) entfernt von dem Stromwandlermodul 10 mit einer entsprechenden Buchse verbunden werden können. Auch die Anschlussdrähte 19, 19' sind dreifach isoliert.At the free ends of the connecting wires 19, 19 ', a plug 207 is attached, with which the connecting wires 19, 19' on the board 30 (see Fig. 2 ) away from the power converter module 10 can be connected to a corresponding socket. The connecting wires 19, 19 'are triple insulated.

Der dargestellt Stromwandler hat aufgrund seiner dargestellten Bauform eine niedrige Temperaturempfindlichkeit und eine hohe Messgenauigkeit auch bei kleinen Messströmen, beispielsweise im Bereich bis zu 100mA bei einer maximalen Messspanne bis 20A. Die Ausführung als Ringkernwandler stellt einen geschlossenen kreis dar, daher ergibt sich eine sehr niedrige Beeinflussbarkeit durch äußere Fremdfelder sowie eine sehr geringe Generierung von Streuflüssen durch den Ringkernwandler selbst. Dies macht es möglich, bei einer Reihenmontage mehrerer Messkanäle auf einer Platine in einem busfähigen Installationsgerät mehrere Stromwandlermodule dicht nebeneinander zu platzieren, ohne dass diese sich gegenseitig beeinflussen.The shown current transformer has a low temperature sensitivity and a high measuring accuracy due to its illustrated design, even with small measuring currents, for example in the range up to 100mA with a maximum measuring span up to 20A. The design as a toroidal transformer is a closed circle, therefore results in a very low influenceability by external extraneous fields and a very low generation of stray flux through the toroidal transformer itself. This makes it possible in a series mounting several channels on a circuit board in a bus-compatible installation device several To place current transformer modules close to each other, without these mutually influence each other.

Schematisch ist dies in Fig. 2 gezeigt. Dort sieht man in einer schematischen Aufsicht auf eine Platine 30 eines busfähigen Installationsgerätes zwei parallel aneinandergereihte Schaltaktorkanäle 33, 33' mit zwei Stromwandlermodulen 10, 10'. Zwischen der lastseitigen Anschlussklemmenreihe 34 mit Anschlussklemmen 34', 34", 34"', 34"" und der Busanschlussseite 35 ist je Kanal ein erfindungsgemäßes Stromwandlermodul 10 eng an einer Aktorbaugruppe 32 liegend angeordnet. Ausschnittsweise sind Leiterbahnen, die an der Unterseite der Platine 30 verlaufen, strichliert eingezeichnet. Eine erste Leiterbahn 36 verbindet eine erste Anschlussklemme 34' mit einem ersten Anschlusspin der Aktorbaugruppe 32. Eine zweite Leiterbahn 36' verbindet eine zweite Anschlussklemme 34" mit der ersten primärseitigen Anschlussstelle 26 des Stromwandlermoduls 10, und von der zweiten primärseitigen Anschlussstelle 26' des Stromwandlermoduls 10 führt eine dritte Leiterbahn 36" zu einem zweiten Anschlusspin der Aktorbaugruppe 32. Von den Austrittsöffnungen 25, 25' des Gehäuses des Stromwandlermoduls 10 führen die beiden isolierten Anschlussdrähte 19, 19' vorbei an der Aktorbaugruppe zu der Busanschlussseite 35 der Platine 30, wo der Stecker 207 in einer Aufnahme zwecks der elektrischen Verbindung aufgenommen ist.Schematically, this is in Fig. 2 shown. There, in a schematic plan view of a board 30 of a bus-compatible installation device, two switch actuator channels 33, 33 'arranged in parallel with one another are shown with two current transformer modules 10, 10'. Between the load-side connection terminal row 34 with connection terminals 34 ', 34 ", 34"', 34 "" and the bus connection side 35, a current transformer module 10 according to the invention is arranged lying close to an actuator assembly 32 per channel. In sections, conductor tracks that run on the underside of the board 30, dashed lines drawn. A first conductor 36 connects a first connection terminal 34 'to a first connection pin of the actuator assembly 32. A second conductor 36' connects a second connection terminal 34 "to the first primary-side connection 26 of the current transformer module 10, and to the second primary-side connection 26 'of the current transformer module 10 From the outlet openings 25, 25 'of the housing of the current transformer module 10 lead the two insulated leads 19, 19' past the actuator assembly to the bus terminal side 35 of the board 30, where the plug 207 is received in a receptacle for the purpose of electrical connection.

Die Schaltaktorbaugruppe 32 hat eine galvanische Trennung zwischen ihrer Last- und ihrer Busseite. Durch das Herausführen der sekundärseitigen Anschlüsse der Ringkernspule des Stromwandlermoduls 10 mittels der isolierten Anschlussdrähte 19, 19' auf die Busseite der Platine ist die Potentialtrennung auf der Leiterplatte 30 gewährleistet.The switch actuator assembly 32 has a galvanic isolation between its load and her bus side. By removing the secondary-side connections of the toroidal coil of the current transformer module 10 by means of the insulated connection wires 19, 19 'on the bus side of the board, the potential separation on the circuit board 30 is ensured.

In der schematischen Aufsicht der Fig. 2 sieht man, dass die ersten, primärseitigen Anschlussstellen 26, 26' und die Austrittsöffnungen 25, 25' für die sekundärseitigen Anschlussdrähte 19, 19' in Längserstreckungsrichtung des Stromwandlermoduls gesehen nahe beieinander liegen. Durch den oben beschriebenen inneren Aufbau des Stromwandlermoduls 10 sind dennoch alle vorgeschriebenen Luft- und Kriechstrecken eingehalten, und das bei einem insgesamt sehr kompakten Aufbau des Stromwandlermoduls 10. Dieses kann als vorgefertigte Baugruppe einfach auf der Platine bestückt werden. Man sieht auch in der Fig. 2, dass der Stromwandlermodul sehr dicht an die Aktorbaugruppe 32 und an Stromwandler 10' benachbarter Kanäle herangesetzt werden kann. Dies ist ermöglicht durch die gute Einhaltung aller vorgeschriebener Luft- und Kriechstrecken bei geringen äußeren Abmessungen des Stromwandlermoduls 10, 10', die hohe Isolationsfestigkeit von 4 kV und die sehr niedrige Beeinflussbarkeit durch äußere Fremdfelder sowie die sehr geringe Generierung von Streuflüssen. Bezugszeichenliste 10 Stromwandlermodul 26' zweite Anschlussstelle 11 Ringkernwicklung 30 Platine 11' Innenraum 32 Aktorbaugruppe 12 Primärkreis-Draht 33 Schaltaktorkanal 13 isolierter Einzeldraht 33' Schaltaktorkanal 13' isolierter Einzeldraht 34 Anschlussklemmenreihe 14 erstes Ende des Drahtes 12 34' Anschlussklemme 16 Eintrittsort 34" Anschlussklemme 18 Anschluss an die Ringkernwicklung 34'" Anschlussklemme 34"" Anschlussklemme 18' Anschluss an die Ringkernwicklung 35 Busanschlussseite 36 erste Leiterbahn 19 Anschlussdraht 36' zweite Leiterbahn 19' Anschlussdraht 36" dritte Leiterbahn 20 Sockel 201 Bodenplatte 21 Abdeckung 202 Breitseite 22 Außenwand 203 erste Schmalseite 23 Anschlusssteg 203' zweite Schmalseite 23' Anschlusssteg 204 Deckplatte 24 Gehäuse 205 Rastnase 25 Austrittsöffnung 206 Führungsrinne 25' Austrittsöffnung 207 Stecker 26 erste Anschlussstelle In the schematic view of the Fig. 2 it can be seen that the first, primary-side connection points 26, 26 'and the outlet openings 25, 25' for the secondary-side connection wires 19, 19 'in the longitudinal direction of the current transformer module are close to each other. Due to the internal structure of the current transformer module 10 described above, nevertheless, all prescribed clearances and creepage distances are maintained, and this with an overall very compact design of the current transformer module 10. This can be easily assembled as a prefabricated module on the board. You can also see in the Fig. 2 in that the current transformer module can be set very close to the actuator assembly 32 and to current transformers 10 'of adjacent channels. This is made possible by the good compliance with all prescribed clearances and creepage distances with small outer dimensions of the current transformer module 10, 10 ', the high insulation strength of 4 kV and the very low influenceability by external foreign fields and the very low generation of leakage fluxes. <U> REFERENCE LIST </ u> 10 Power converter module 26 ' second connection point 11 Toroidal winding 30 circuit board 11 ' inner space 32 actuator assembly 12 Primary circuit wire 33 switch actuator 13 isolated single wire 33 ' switch actuator 13 ' isolated single wire 34 Terminal series 14 first end of the wire 12 34 ' terminal 16 of entry 34 " terminal 18 Connection to the toroidal winding 34 '' terminal 34 "" terminal 18 ' Connection to the toroidal winding 35 Bus side 36 first trace 19 Lead wire 36 ' second trace 19 ' Lead wire 36 " third trace 20 base 201 baseplate 21 cover 202 broadside 22 outer wall 203 first narrow side 23 connecting web 203 ' second narrow side 23 ' connecting web 204 cover plate 24 casing 205 locking lug 25 outlet opening 206 guide trough 25 ' outlet opening 207 plug 26 first connection point

Claims (10)

  1. Current transformer module (10) for a bus-enabled installation device, comprising a base (20) in which a toroidal core winding (11) of the module with connections (18, 18') is arranged, the said toroidal core winding forming a secondary circuit of the current transformer, wherein an insulated wire (12) which forms a primary circuit of the current transformer is routed through the toroidal core winding (11), wherein an entry location (16) for the entry of the insulated wire (12) into the ring of the toroidal core winding (11) and an exit location for the exit of the insulated wire (12) from the ring of the toroidal core winding (11) are defined, and the insulated wire (12) is stripped of insulation at its ends, so that free ends (14) are formed, wherein the base (20) is of cup-like design and has a base plate (201), broad sides (202) and narrow sides (203, 203'), and the insulated wire (12) which forms the primary circuit is part of the current transformer module (10) and is routed from a first, free end (14) as far as the entry location (16) on a first broad side (202) of the outer wall (22) of the base (20) and from the exit location to a second, free end on a second, opposite broad side of the outer wall (22) of the base (20), characterized in that the connections (18, 18') of the toroidal core winding (11) are routed away from the base (20) by means of an insulated connection wire (19, 19') in each case, so that the connection wires (19, 19') can be connected to a printed circuit board (30) at a distance from the base (20), and the connection wires (19, 19') are part of the current transformer module (10).
  2. Current transformer module (10) according to Claim 1, characterized in that the insulated wire (12) which forms the primary circuit is designed as a twin wire comprising two insulated individual wires (13, 13') which are situated next to one another.
  3. Current transformer module (10) according to Claim 2, characterized in that the individual wires (13, 13') are provided with a three-ply insulating layer.
  4. Current transformer module (10) according to Claim 1, characterized in that the toroidal core winding (11) has at least 1000 turns.
  5. Current transformer module (10) according to Claim 1, characterized in that the toroidal core winding (11) is surrounded by a foil strip as additional insulation.
  6. Current transformer module (10) according to Claim 1, characterized in that the current transformer module (10) comprises a housing (24) of base construction, formed from the base (20) and a cover (21) which has a covering plate (204) which is situated opposite the base plate (201) of the base (20).
  7. Current transformer module (10) according to Claim 1, characterized in that the first, free end (14) of the insulated wire (12) protrudes beyond the base plate (201) of the base (20) at a first connection point (26) and the second, free end of the insulated wire (12) protrudes beyond the said base plate at a second connection point, wherein the two connection points (26) are situated close to a first narrow side (203) of the base (20).
  8. Current transformer module (10) according to Claim 7, characterized in that connection webs (23, 23') are formed on the base (20) and carry the connections (18, 18') of the toroidal core winding (11), wherein the connection webs (23, 23') are arranged close to a second narrow side (203') of the base (20), which second narrow side is situated opposite the first narrow side (203).
  9. Current transformer module (10) according to Claim 8, characterized in that the insulating connection wire (19, 19') exits from the housing (24) at an exit opening (25, 25'), wherein the exit opening (25, 25') is formed in the cover (21) opposite the first and, respectively, second connection point (26).
  10. Bus-enabled installation device, in particular switching actuator, comprising a printed circuit board (30) onto which a current transformer module (10) according to one of the preceding claims and an actuator assembly (32) are mounted, characterized in that the current transformer module (10) is arranged adjacent to the actuator assembly (32) and the free ends (14), at the fastening location of the current transformer (10) on the printed circuit board (30), are electrically connected to the said printed circuit board, and in that the connection wire (19, 19') is electrically connected to the circuit board (30) on a side of the actuator assembly (32) that is situated opposite the current transformer module (10), and the current transformer module (10) and the actuator assembly (32) are part of the installation device.
EP11002444.5A 2010-04-16 2011-03-24 Current transformer module for a bus-enabled installation device Active EP2378528B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010015488A DE102010015488A1 (en) 2010-04-16 2010-04-16 Current transformer module for a bus-compatible installation device

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EP2378528A2 EP2378528A2 (en) 2011-10-19
EP2378528A3 EP2378528A3 (en) 2017-07-26
EP2378528B1 true EP2378528B1 (en) 2018-10-24

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EP (1) EP2378528B1 (en)
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010015488A1 (en) * 2010-04-16 2011-10-20 Abb Ag Current transformer module for a bus-compatible installation device
CN105529169A (en) * 2015-12-01 2016-04-27 上海法腾电力科技有限公司 Back wiring current transformer of 550 electrical cabinet
CN106449021B (en) * 2016-10-14 2017-12-22 无锡市海升电子科技有限公司 It is a kind of to dismount the high durable type current transformer of convenient stability
CN110911097A (en) * 2019-12-24 2020-03-24 安徽华能集团电器有限公司 Voltage transformer subassembly convenient to change

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6753749B1 (en) * 2003-06-05 2004-06-22 Artesyn Technologies, Inc. Toroidal transformer enclosure
CN2639896Y (en) * 2003-07-29 2004-09-08 台达电子工业股份有限公司 Current induction module
DE102004021835B4 (en) * 2004-05-04 2006-05-11 Tyco Electronics Amp Gmbh device terminal
DE102007037058B4 (en) * 2007-08-03 2015-07-30 Siemens Aktiengesellschaft Current transformer module for an energy and / or power meter and energy and / or power meter with current transformer module
DE102009048935A1 (en) 2009-07-28 2011-02-10 Abb Ag Bus-capable control device for controlling at least one consumer
DE102010015488A1 (en) * 2010-04-16 2011-10-20 Abb Ag Current transformer module for a bus-compatible installation device

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EP2378528A2 (en) 2011-10-19
EP2378528A3 (en) 2017-07-26
CN102222560A (en) 2011-10-19
CN202206288U (en) 2012-04-25
DE102010015488A1 (en) 2011-10-20

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