EP2664043A1

EP2664043A1 - Insulator arrangement

Info

Publication number: EP2664043A1
Application number: EP12701230.0A
Authority: EP
Inventors: Martin Schumacher
Original assignee: Siemens AG
Current assignee: Siemens AG
Priority date: 2011-01-10
Filing date: 2012-01-06
Publication date: 2013-11-20
Also published as: CN103329378A; US20140069715A1; WO2012095366A1; DE102011008451A1

Abstract

The invention relates to an insulator arrangement, comprising an insulating body (1, 1a). A phase conductor (5a, 5b, 5c, 5d) passes through the insulating body (1, 1a), and said phase conductor (5a, 5b, 5c, 5d) is surrounded by an electrode (7a, 7b, 7c, 7d). A gap (9) passes through the electrode (7a, 7b, 7c, 7d), in particular completely, said gap interrupting a completely closed circumference of the electrode (7a, 7b, 7c, 7d).

Description

description

isolator assembly

The invention relates to an insulator arrangement comprising an insulating body and at least one of the insulating body in the direction of a major axis from a first end side to a second end side passing through phase conductor which is encompassed substantially transversely to the main axis of an electrode.

Such an insulator arrangement is known for example from the published patent application DE 2 325 449. An insulating body of the local insulator arrangement is penetrated by a phase conductor, which is encompassed by an electrode. The local electrode is part of a capacitor arrangement for determining an electrical voltage applied to the phase conductor.

Insulator arrangements generally have a limited volume. Due to the relatively high cost of high-quality insulating materials for the formation of the insulating body, it is desirable to reduce their volume. Ent ^¬ speaking, the available space for receiving an electrode reduced.

This results in an object of the invention to use the space available on an insulator space more effectively.

According to the invention the object is achieved in an insulator arrangement of the type mentioned above in that the electrode penetrated by a gap, in particular completely durch- is set, which interrupts a completely closed circulation of the electrode.

For example, an electrode can circulate almost closed around the phase conductor, with mutually facing ends of the electrode defining a gap. The gap thus interrupts a completely closed circulation of the electrode, wherein a distance between the gap limiting surfaces of the electrode over the gap is substantially less than a distance between the gap defining surfaces in the circumferential direction over the electrode body. The gap may extend only partially into the electrode body, so that a point of discontinuity is created in the circulation of the electrode, but the electrode is not completely penetrated. Through the gap is the cross section of

Electrode reduced in circulation. The gap extends in a stitch-like manner into the electrode body. It is advantageous if the gap extends completely through the electrode body. The gap should have a component oriented transversely to the orbit of the electrode, so that the electrical resistance in the circulation of the electrode is increased by the gap. The gap should be slit-like struc ^¬ riert, so that the gap in the electrode body

slits in like a slit. Preferably, the gap should completely penetrate the electrode body. However, it can also be provided that the gap only partially penetrates the electrode and thus partially interrupts a completely closed circuit. The gap should be configured such that the surfaces of the electrode bounding the gap are aligned approximately parallel to one another. The surfaces may be provided with entspre ^¬ sponding profiles, wherein a profile of a gap-defining surface approximately equal to should be designed to profiling the other gap limiting surface. Thus vorgese ^¬ hen can be, for example, that the gap passes through the electrode step-like, curved, corrugated, curved, spiral, etc..

The electrode acts as a field concentration device, in particular for magnetic and / or electrical fields.

In particular, rotationally symmetrical structures of the electrode have proven to be advantageous, wherein the cross section may vary in the direction of rotation. The electrode may have, for example rectangular, circular, curved cross sections ^¬. The gap passes through the electrode in the direction of the cross section, ie, the gap reduces the cross section or the gap passes completely through the cross section, so that the areas bounding the gap at least partially or completely correspond to a cross section of the electrode. In addition to an annular orbit of the electrode, it is possible to let the electrode also polygonal, oval, etc. circulate. The electrode can be designed, for example, as a cut ^tape electrode.

A further advantageous embodiment can provide that the electrode is penetrated in the radial direction of the gap.

A radial profile of the gap makes it possible to form a gap lying transversely to the direction of rotation of the electrode. At least in sections, the gap bounding surfaces may be perpendicular to the orbit of the electrode. Such FLAE ^¬ surfaces are particularly suited to, pass through the field lines which are concentrated by the electrode approximately parallel through the gap and perpendicular from or to have to enter the space. The electrode may, for example, as Magnetic field concentrator act, wherein magnetic field lines are concentrated within the electrode and bundled in the direction of rotation of the electrode. The magnetic field lines emerge from the gap limiting surface and enter the other gap limiting surface, so that the

Gap is also interspersed by the magnetic field lines. The gap should preferably be penetrated as homogeneously as possible by the magnetic field lines. In the case of a partial penetration of the gap into the electrode, it is possible to pass a portion of the field lines in the electrode body past the gap and to allow only remaining portions to pass through the gap. By the ratio of remaining cross-section of the electrode to the gap and by Mate ^¬ rialwahl, gap width, gap shape, etc., a division of the field lines can be controlled.

A further advantageous embodiment can provide that in a lateral surface connecting the end faces of the insulating body a blind hole-like pocket opens, which extends in the direction of the gap.

A blind hole-like pocket within the insulator he ^¬ allows an access to the gap through the insulating body. Depending on requirements, the bag can extend into the gap or end in its surroundings. Thus, it is possible, for example, to spend more components in the Be ^¬ rich the gap. It can be provided that the gap limiting surfaces of the electrode, the bag ^¬ hole-like pocket limit at least in sections. However, it can also be provided that the blind hole-like bag is completely be ^¬ borders of insulating material of the insulating body. It is advantageous if the blind hole-like pocket protrudes into the gap. This makes it ^¬ example, possible measuring instruments into the gap of the electrode introduce. In this case, an overdec ^¬ tion of the gap limiting surfaces of the electrode may be provided with insulating material in the region of the gap. A receipt of the blind hole-like bag over a shell side of the insulator makes it possible to keep the faces of the Isola ^¬ tors free of inhomogeneities such openings, caps o. Ä., So that these areas can be ^¬ sprucht dielectric bean. Furthermore, the isolator arrangement can be connected to other components on the front side so that a jacket-side access is still ensured, even if the insulator arrangement is overlapped on the front side. Thus a retrofit, an off ^¬ exchange, a repair of the blind hole-like pocket, for example, be made Toggle parent components.

Advantageously, further provision can be made that the electrode is contacted by a passing through the insulating elec trically conductive ^¬ compound.

By means of an electrically conductive connection, a contacting of the electrode is made possible even when embedding it in the insulating body. In this case, the contacting region between the electrode and the electrically conductive connection of insulating material of the insulating body can be completely covered. Especially in a full Einbet ^¬ processing of the electrode, this is advantageous. The contacting region is thus protected from external influences as well as from vibrations, etc., so that it is difficult to detach the electrically conductive connection from the electrode. Furthermore, the possibility is open ^¬ pass through the electrically conductive connection, from the outside, that is, to apply from the outside of the insulating body or from outside the insulator assembly, the electrode having a certain electrical potential, and If necessary, to make this potential variable. It has proven to be advantageous to apply the electrode to ground potential. Thus, the possibility is open ^¬ give to let in the case of electrical charging of the electrode, charge carriers through the electrically conductive connection to ground potential derived. The electrically conductive connection should be dimensioned such that a ent ^¬ speaking discharge current can be permanently supported by the electrically conductive connection. The electrically conductive connection may advantageously exit the shell side of the Iso ^¬ lierkörper.

The discharge current can be evaluated by means of a measuring device. Thus, there is the possibility of being able to infer from the amount of the discharge current, if appropriate, also from its phase position or from other characteristic components to the voltage stress of the phase conductor. The phase conductor when subjected to an electrical voltage, that is, with a ^¬ Various NEN of ground potential capable of driven to perform this voltage an electric current. The voltage stress of the phase conductor can lead to a charging of the electrode, wherein this charge can be reduced via the electrically conductive connection. The discharge current is an image of the driving voltage on the phase conductor, so that an indirect voltage measurement over the discharge current is made possible.

Furthermore, it can be advantageously provided that the insulating body is surrounded by an electrically conductive frame, in particular a metallic frame, which is connected via an electrically conductive connection to the electrode. The use of a frame around the insulating body allows to protect the insulating body from mechanical effects. More specifically, the low expansion having in comparison to an end face of the cladding region Iso ^¬ lierkörpers is protected by the frame from acting forces. The frame may for example be designed as a hollow cylinder with circular cross-sections. Innenman- side, the frame may have a profiling, for example, a circumferential groove, in which the insulating body may be inserted positively. An electrically conductive embodiment of the frame makes it possible to ^apply ground potential to the frame and to undertake a dielectric shielding of the inner insulating body. Furthermore, the frame can serve, for example, a connection of the insulator ^arrangement with further assemblies. For example, the frame may have flange surfaces over which the insulator assembly can be flanged, for example, with another flange. A metallic frame also offers the advantage that an insulating body for producing the insulator assembly can be poured directly into the frame. The frame thus acts as so-called "lost formwork".

An electrically conductive connection between frame and

Electrode makes it possible to equalize the potential of the electrode and Rah ^¬ men, so that potential differences can be equalized between the frame and the electrode. Thus, this area is estimated to be field-free. Thus, no partial discharges can result in this area. Thus, a dielectrically stable insulator arrangement can be formed. Furthermore, in a correspondingly rigid embodiment of the electrically conductive connection between

Electrode and frame positioning of frame and

Electrode be made to each other. This is especially re then advantageous if the insulating body in the course of a casting process to be poured directly into the frame.

However, it can also be provided to use so-called frameless insulator arrangements. Such insulator arrangements dispense with a separate frame, so that a limitation of the insulator arrangement is given by the insulating body itself. Thus, the insulating body may, for example, also be designed with flange surfaces to connect the Isolatoranord ^¬ voltage by means of a flanging with further modules. The insulating body thus assumes the mechanical functions of a separate frame. One speaks of a frameless insulator arrangement or of an insulating body with an integral frame.

Furthermore, it can be advantageously provided that the electrically conductive connection with the electrode in the region of the gap is contacted.

An electrically conductive connection may advantageously be contacted in loading ^¬ reaching the gap with the electrode. Thus there is a possibility to monitor the electrically conductive Verbin ^¬ formation and the state, for example, using a blind hole-like pocket. For example, the electrically conductive connection can extend through the blind hole or at least partially form a wall defining the blind hole. However, it can also be provided that the electrically conductive connection is completely contacted in insulating material of the insulating body in the region of the gap with the electrode.

Furthermore, it can be advantageously provided that a magnetic field measuring device projects into the gap. As stated above, the electrode Feldkon ^¬ zentrationseinrichtung, bundle, for example, magnetic fields, and can concentrate. In the region of the gap, it is possible to detect magnetic field lines that exceed a gap delimiting area from another area delimiting the gap by means of a magnetic field measuring device and to obtain information about the magnetic field concentrated by means of the electrode. For this purpose, can be provided for example that the electrode is formed of a soft magnetic ^¬ tables material, for example a ferromagnetic material. As a magnetic field measuring device, for example Hall sensors can be used. The magnetic field measuring device may for example be mounted on a finger, which projects into the pocket of the insulating body, so that in a simple manner positioning of the magnetic field measuring device is provided. This further allows a simplified removal and installation of the magnetic field measuring device. The magnetic field detected by the magnetic field measuring device can originate, for example, from an electrical current flowing through the phase conductor. Advantageously, the magnetic field concentrated by the electrode should behave in proportion to the electric current flowing in the phase conductor. Thus, a mapping of an electric current flowing in the phase conductor can be carried out via a magnetic field measuring device. A proportionality should ^¬ te particular be present both in terms of magnitude and the phase position of the electric current. A further advantageous embodiment can provide that a current measuring device is arranged on the electrically conductive connection. An electrical current flowing within the phase conductor is usually driven by an electrical voltage. The voltage may be a DC or AC voltage, which has a corresponding DC or AC flow result. This can lead to charge phenomena on the electrode, which can be derived via the electrically conductive connection. Particularly when the electrode is grounded via the electrically conductive connection, such charge phenomena are readily degradable. If one uses the resulting discharging current and measures it, this is an indication of the voltage applied to the phase conductor. Thus, a voltage monitoring of the phase conductor is made possible by means of a current measurement at the electrically conductive connection. Depending on the type of measurement of the discharge current and quantitative information about the electrical voltage can be determined.

The electrically conductive connection is an easily accessible area and interference can only be difficult in this area. For example, an occurrence of unwanted stray currents is not expected in a positioning ^¬ tion within the insulator. Accordingly, the image of an electrical voltage has over one

Current measurement at the electrically conductive connection a good statement. In turn, various methods can be used to measure the current. For example, a transformer principle can be used, wherein the

electrically conductive connection as a primary side and a ^{¬ responsively} arranged winding can serve as a secondary side. However, alternative sensors can also be used. Thus, for example, fiber optic sensors or Hall sensors, etc. can be used. A sensor for measuring current in the electrically conductive connection and a sensor for measuring the magnetic field can be located within the same be arranged blind hole bag. The sensors can be positioned on a common finger and protrude into the blind hole-like pocket. If an equipment of the insulator arrangement is provided with a frame, the electrically conductive connection between the electrode and the frame can be arranged. Within this section, you can also make current measurements. However, it can also be provided that the electrically conductive connection is electrically insulated by the frame, and a measurement of the Entla ^¬ dung stream outside the insulator assembly. It can further be provided that the electrically conductive connection extends between the electrode and the frame, wherein the frame carries ground potential. In this case, a measurement of the discharge current can also be made in the / the ground line (s) of the frame.

It is particularly advantageous if the electrode is used both for current and for voltage monitoring of the phase conductor. This makes it possible to determine in a compact space in ^¬ mation about the current and voltage on phase conductor. It can be advantageous if the current and voltage measuring devices are introduced together into the blind-hole-like pocket of the insulating body. For example, current and voltmeter can be arranged on a measuring finger introduced into the blind-hole-like pocket.

A further advantageous embodiment can provide that the phase conductor and the electrode are aligned coaxially to the main axis.

A coaxial alignment of electrode and phase conductor to the main axis is particularly advantageous when a einzi ^¬ ger phase conductor passes through the insulating body and the insulating body optionally from an annular frame is surrounded. If now the phase conductors coaxial to the main axis of the frame and arranged to the main axis of the Isolatoranord ^¬ voltage and the electrode further clasping arranged the phase conductor coaxially to the main axis, the result is a shell-like structure in which a homogeneous field ^¬ distribution is expected. Such constructions can for example be used advantageously in gas-insulated switchgear, which have a single-phase gas insulation on ^¬ . Within a tubular encapsulating a phase conductor is guided, wherein an insulator assembly is arranged frontally on the encapsulating and the Pha ^¬ senleiter of the encapsulating is electrically conductively contacted with the phase conductor of the insulator assembly. The interior of the encapsulating housing is filled with an electrically insulating gas.

Are a further advantageous embodiment may provide that a plurality of phase conductors distributed on a circular path around the main axis pass through the insulating body and in each case in materiality loan transversely to the main axis of each of an electrode to ^¬ attacked.

Several phase conductors can serve, for example, the transmission of a polyphase alternating voltage electrical energy transmission network. In particular, the use of three Pha ^¬ senleitern has prevailed there. So it is ^¬ example, advantageous to arrange the various phase conductors distributed on a circular path around the main axis. In particular, a uniform distribution is desirable, with the use of exactly three phase conductors this, in the direction of the main axis, should mark the vertices of a gleichseiti ^¬ gene triangle. Each of the phase conductors is encompassed by a separate electrode, wherein the electrodes are electrically insulated from one another on the insulating body However, each electrode can be connected via an electrically conductive connection described above with ground potential and thus the electrodes can be indirectly connected to each other. The electrodes can be completed analogously with a blind hole bag, several measuring devices, etc.

It can be advantageously provided that each of the electrodes is penetrated by a substantially radially extending to the main axis gap.

By using columns in the electrodes, which are aligned in each case radially to the main axis, creates a struc ^¬ ture, in which a spacing of the column each other is carried out uniformly and with a large distance. Since ^¬ with, it is possible to space individual measuring devices from each other as far as possible and to avoid mutual embedding ^¬ flussung thereof. Furthermore, such a possibility is given to arrange the column comparatively short distance to an edge of the insulating body, so that elec ^¬ trically conductive connections between the respective electrodes can be made relatively short by the insulating body. Preferably, the gaps should lie in the regions of the electrodes which face the edge or the frame of the insulator arrangement.

Regardless of the number of electrodes and the number of phase conductors, a separate or integral frame should be aligned coaxially with the major axis. Within the frame, one or more electrodes or one or more phase conductors can then be positioned symmetrically distributed. In this case, the electrodes are each electrically insulated with respect to each of the phase conductors and an electrical contacting of the electrodes with one another is excluded. finally provided via the respective electrically conductive connection. Direct electrical contacts between the electrodes are not provided. Likewise, a direct contacting of the electrodes with an optional separate frame is not provided. Only via the electrically conductive connection between the respective electrode is an electrical contacting and potential transfer between the electrodes or between the electrodes and a frame possible.

Advantageously, it can further be provided that the frame rotates coaxially with the main axis.

A coaxial arrangement enables a usage of a mög ^¬ lichst homogeneous shielding effect of the frame.

Furthermore, it can be advantageously provided that the ^{electrodes are} completely enclosed by the insulating body.

A complete embedding of the electrodes in the insulating body makes it possible to protect the electrodes from direct external influences. In this case, the complete enclosure should be provided in such a way that there is no direct access to the electrodes on the front and on the shell side. However, complete enclosure of the electrodes includes access to them, for example, via connection points or other accesses provided in the blind-hole-like pocket.

Advantageously, it can further be provided that the phase conductor (s) form an angle-rigid composite with the insulating body. An angularly stable connection between phase conductors and insulating body makes it possible to support and position the phase conductors over the insulating body. Thus, the insulating body can act as a support insulator on the one hand and can be used, on the other hand, to monitor the state of the phase conductors. For example, it may be provided that a frame of the insulator assembly and / or the insulating body itself is fastened to a flange, whereby the insulating body supports the phase conductor with respect to the flange. For example, it is possible to fix an insulator arrangement to end-side tube openings of encapsulation housings and to use the insulator arrangement, for example, for closing end-side flange openings in encapsulation housings of gas-insulated electrical energy transmission devices. The composite between phase conductor and insulating body can be made fluid-tight.

Furthermore, it can be advantageously provided that the insulating body is disc-shaped.

A disk-shaped insulating body in particular comprises insulating bodies which have a planar structure. However, disc-shaped insulating body are also given when the insulating body is formed, for example, pot-shaped arched. A disk-shaped insulating body has a flat

Extension, wherein the areal extent is penetrated by at least one phase conductor. This disc-shaped insulating body are able to span, for example, flange openings in encapsulating and cover.

A further advantageous embodiment may provide that the disc-shaped insulating body has a profiling. By means of a profiling, a creepage path can be extended along a surface of the insulating body, for example between a phase conductor and a frame. A profiling, for example, a ribbing, recesses in the insulating body, etc. have.

A further advantageous embodiment can provide that access to the blind-hole-like pocket is provided via the frame.

The frame may advantageously have a lateral surface of the Iso ^¬ lierkörpers enclose, so that the outer surface is protected against external influences. If you now consider access via the frame, the blind-hole-like bag can also be equipped with components, such as measuring devices or the like, even after completion of the insulating body with a frame, or an exchange thereof can be made. In particular, in the case of a front-side flanging of the insulator arrangement, access to the insulating body is possible only with a large disassembly effort. If a corresponding access is provided in the frame, access to the blind-hole-like pocket from the outside is also possible in the installed state, if necessary also in the live state of the phase conductor (s). For this purpose, the frame can comprise, for example egg ^¬ ne closable access opening, a closure element can also be used to test leads o. Ä. Lead out from the interior of the blind hole-like pocket.

In the following, an embodiment of the invention is sche ^¬ matically shown in a drawing and described in more detail below.

It shows the Figure 1 is a perspective view of a Isolatoranord ^¬ tion, the

Figure 2 shows a cross section through the insulator assembly, the

Figure 3 is an enlarged view of part of the figure

2, the

Figure 4 is an enlarged view of part of the figure

3, the

Figure 5 is a perpendicular to the plane of lying of the Figure 4 section, and Figure 6 shows an alternative embodiment of a Isolatoranord ^¬ voltage in cross section.

The isolator arrangement shown in perspective in FIG. 1 has an insulating body 1. In the present case, the insulating body 1 is disc-shaped and has a circular contour. The insulating body 1 is penetrated by a main axis 2. The insulating body 1 is enclosed by a frame 3. The frame 3 is presently annular and aligned coaxially with the main axis 2. The frame 3 encloses the insulating body 1 of the insulator assembly on the shell side and limits the substantially transversely, in particular perpendicular to the main axis 2 extending end faces. The end faces also each have a circular contour. Alternatively, in the exemplary embodiment according to FIG. 1 as well as in the illustrations of the further figures, the use of a frame 3 can be dispensed with. Shape and mechanical action of the frame 3 are integrated into the insulating body 1. On a circular path 4, which is coaxial with the main axis 2, a first phase conductor 5a, a second phase conductor 5b and a third phase conductor 5c are arranged. The circular path 4 is shown in the figure only for symbolization. The phase conductors 5a, 5b, 5c are configured substantially identically and pass fluid-tightly through the insulating body 1 of the insulator arrangement in the direction of the main axis 2. The phase conductors 5a, 5b, 5c preferably each have a rotationally symmetrical structure, the axes of rotation of the phase conductors 5a, 5b , 5c, 5d are aligned parallel to each other and the main axis 2 is also parallel to the axes of rotation. The phase conductors 5a, 5b, 5c may, for example, have a cylindrical shape, with circular top surfaces lying flush in the end faces of the insulating body 1.

The frame 3 is presently provided as a frame with a ^{wesentli ¬} Chen U-shaped profile which opens in the direction of the main axis 2 and revolves around this, wherein in the U-shaped profiling a diametrically opposite shape of the insulating body 1 protrudes, so that a angle rigid composite between insulator 1 and the frame 3 is given. About the insulating body 1, the phase conductors 5a, 5b, 5c are fixed relative to the frame 3. The frame 3 has a plurality of recesses aligned substantially parallel to the main axis 2, by means of which the frame 3 and thus the entire Iso ^¬ latoranordnung is flanged, for example by means of bolts to a counter-shaped flange. Such a flange may be arranged, for example, on a pressure-resistant encapsulation housing of a gas-insulated switchgear, so that this flange is spanned and covered by means of the insulator arrangement. A fluid-tight connection by means of a ent ^¬ speaking sealing element can be made between the insulator assembly and the flange. Furthermore, NEN of the frame 3, the insulating body 1 and the phase conductors 5a, 5b, 5c each be fluid-tightly interconnected, so that the insulator assembly can also serve as a fluid-tight closure of a flange, the phase conductors 5a, 5b, 5c, the insulator assembly in the direction of the main axis enforce and so ermögli ^¬ chen electrical contacting of located in the interior of the encapsulating phase conductors. Furthermore, access openings 6a, 6b are shown in FIG. The access openings 6a, 6b extend through the frame 3 substantially in the radial direction, so that access to a lateral surface of the insulating body 1 via the access openings 6a, 6b is given. The access openings 6a, 6b can be closed, for example, by means of closure elements.

In alternative embodiments of the isolator arrangement shown in FIG. 1, alternative forms for the frame as well as alternative forms for the first, second and third phase conductors 5a, 5b, 5c as well as for the insulating body 1 etc. may be provided. In particular, the number of phase conductors 5a, 5b, 5c may vary. When using a single phase conductor that can be centrally positioned, for example, coaxially to the main axis 2 within the insulating body 1 and in ^¬ nerhalb of the frame. 3 A cross-section through such alternative embodiment is shown schematically in Fi gur ^¬. 6 FIG. 2 shows a section through the insulator arrangement known from FIG. In this case, the sectional plane is lot ^¬ right to the main axis 2. In Figure 2, the frame 3 can be seen, which shows in section the bottom of the U-shaped profiling. Furthermore, the three phase conductors 5a, 5b, 5c shown. The insulating body 1 is, for example, a cast-resin insulating body, which was introduced in the liquid state in the frame 3 and thus produces a fluid-tight connection between the frame 3 and phase conductors 5a, 5b, 5c.

In each case coaxially to the three phase conductors 5a, 5b, 5c ei ^¬ ne first electrode 7a, a second electrode 7b and a third electrode 7c are embedded in the insulating body. 1 The electrodes 7a, 7b, 7c have present an annular structure, the electrodes 7a, 7b, 7c along To have a rectangular cross section of its ^¬ run. However, the cross section of the electrodes 7a, 7b, 7c and their shape may vary. The electrodes 7a, 7b, 7c are positioned at a distance from one another, spaces between the electrodes 7a, 7b, 7c and between the electrodes 7a, 7b, 7c and the respective phase conductors 5a, 5b, 5c being filled by the insulating body 1. In those regions of the electrodes 7a, 7b, 7c facing the frame 3, blocks 8 are symbolically shown in FIG. The structure of the blocks 8 will be described below with reference to FIGS. 3, 4 and 5 by way of example.

FIG. 3 shows an enlargement of the first electrode 7a and the first phase conductor 5a surrounded by the first electrode 7a. The frame 3 is just as the insulating body 1 only partially shown. The electrode 7a to ^¬ engages the first phase conductor 5a with electrode 7 and the phase conductors 5a respectively formed rotationally symmetrical. The first electrode 7a circulates so that the electrode 7a and the first phase conductor 5a are arranged coaxially with each other. The electrode 7a has a gap 9 on its region facing the frame 3 or the edge of the insulating body 1. In the present case, the gap 9 completely penetrates the first electrode 7a. However, it can also be be seen that the electrode 7a is only partially penetrated by a gap. The gap 9 limiting Wan ^¬ compounds of the first electrode 7a are present just ausges ^¬ taltet, the gap 9 extends radially through the wall of the first electrode 7a through in the direction of the first phase conductor 5a.

A blind hole-like Ta ^¬ specific 10 is formed in the present case the insulating body 1 which extends into the gap membered to 9 inside. The blind hole-like bag 10 is radially to

Phase conductor 5a and aligned with the main axis 2. The bag ^¬ hole-like bag 10 may have various cross-sections on ^¬ . For example, the bag 10 may have a circular cross section, an oval cross section, a rectangular cross section, or an otherwise shaped cross section. The blind hole-like pocket 10 may ^¬ with fully extend through the gap 9 or 9 only partially pass through the gap or only extend up to the gap 9, since, the pocket 10, however, does not extend into the gap. 9 In the latter case, the gap 9 may be filled with insulating material of the insulating body 1. However, it may also be provided that the pocket 10 extends into the slot 9 extends, and the gap 9 limiting FLAE ^¬ surfaces of the first electrode 7a also limit walls of the bag sacklocharti- gen 10th However, it can also be provided that such surfaces are covered by a layer of insulating material.

In the region of the gap 9, an electrically conductive connection 11 is provided, by means of which the first electrode 7a is electrically conductively connected to the frame 3. In this case, the electrically conductive connection can be configured in such a way that the components provided for forming the connection are the pocket-like pocket 10 at least in sections limit. However, it can also be provided that the electrically conductive connection 11 is embedded in the insulating body 1, so that the blind-hole-like pocket 10 does not allow un ^¬ indirect access to the electrically conductive connection 11. In the case of a waiver of a frame 3, the electrically conductive connection 11 is guided at least to the edge on the outer circumference of the insulating body 1. There, for example, a contact with ground potential he follow ^¬ .

An access opening 6a of the frame 3 is aligned with the mouth opening of the blind-hole-like opening 10, so that access to the blind-hole-like bore is given from a radial direction even when the insulating body 1 is completed with a frame 3. The frame 3 may for example be made of electrically conductive material, can be manufactured at play ^¬ a metal, which frame should lead 3 is preferably ground potential. On the elekt ^¬ driven conductive connection 11, the ground potential of the framework can be mens transferred to the first electrode 7a. 3

The first electrode 7a serves as Feldkonzentrationseinrich ^¬ device, preferably magnetic fields are to be concentrated by means of the first electrode 7a. As such, the first electrode 7a may be formed of ferromagnetic material. In particular, soft iron materials are suitable for the design of the first electrode 7a. Embodiments to the described first electrode 7a and the second of these Elect ^¬ rode associated assemblies can find also for the other named in this document, electrode and insulator assemblies application in an analogous manner.

By way of example, FIG. 4 shows a filling of the blind-hole-like pocket 10 with a first measuring device 12a and a second measuring device 12b. The ^{¬ at} the measuring devices 12a, 12b are shown only by way of example. It may be provided that the measuring devices 12a, 12b represent parts of a higher-level measuring apparatus, wherein, for example, evaluation units etc. may be located outside of the blind-hole-like pocket 10.

The first electrode 7a with the gap 9 serves as a magnet ^¬ field concentrators, such that the gap are interspersed 9 of Mag- netfeldlinien, which is preferably approximately perpendicular from the exit the gap 9 bounding surfaces of the first electrode 7a and enter into this space. In FIG. 4, the magnetic field in the area of the gap 9 is symbolized by three curved arrows lying concentrically to each other. The magnetic field passes through the first measuring ^device 12a. 12a, the first measuring device, the magnetic field which WUR focused by the first electrode 7a ^¬ de map. A magnetic field is caused in the first electrode 7a by a current flow in the associated first phase conductor 5a. The induced by a current flow in the first phase conductor 5a magnetic field is concentrated in the first electrode 7a and also passed through the gap 9 towards ^¬. In this case, the magnetic field represents an image of a current flow through the first phase conductor 5a, so that an electrical current flow through the associated first phase conductor 5a can be deduced by means of the first measuring device 12a. The first measuring device 12a can, for example, contain a Hall sensor, which can detect the magnetic field.

A voltage driving a current flow through the first phase conductor 5a can cause electrical charging of the first electrode 7a. By means of the electrically conductive connection 11, which connects the first electrode 7a to the ground potential. al leads frame 3, a discharge over a flowing through the electrically conductive connection 11 discharge current is made possible. The discharge current via the electrically conductive connection is a measure of the voltage applied to the first phase conductor 5a electrical voltage.

Furthermore, a second measuring device 12b is provided, by means of which a current flow through the electrically conductive connection 11 can be imaged. In the present case, FIG. 4 symbolically illustrates a transformer tap of the current flowing in the electrically conductive connection. Alternatively, instead of the transformer principle, another measuring principle can be used. For example, by optical detection or by detection by means of Hall probes, an image of an electrical voltage can be applied to the first phase conductor 5a via the second measuring device 12b. Further, a measurement of the discharge current and outside of the bag 10 SUC ^¬ gene, for example in a ground current path.

Signal lines of the first and the second measuring means 12a, 12b are guided through the access opening 6a in the frame 3 to the outside. 5 shows a perpendicular to Zei ^¬ chenebene of Figure 4 lying section.

Figure 6 shows an alternative embodiment of a Isola ^¬ gate array, wherein the isolator assembly has only a single phase conductor 5d. The phase conductor 5d is aligned coaxially to a main axis 2 and embedded in an insulating body 1a. The insulating body la is surrounded by a frame 3a. Except for the position of the single phase conductor 5d and the number of access openings in the frame 3a, a perspective view differs from that in FIG Figure 6 embodiment shown in principle hardly from the insulator assembly shown in Figure 1.

FIG. 6 shows, by way of example, a single-phase configuration of an insulator arrangement in cross-section. Coaxially with the single phase conductor 5d, a fourth electrode 7d is arranged. The fourth electrode 7d corresponds in principle to the structure of the electrodes, as shown in FIGS. 2, 3, 4 and 5. The fourth electrode 7d is arranged coaxially with the main axis 2 and thus coaxially with the single phase conductor 5d. The frame 3a is also coaxially ^¬ directed to the main axis. 2 Symbolic the location of a gap in the fourth electrode 7d angedeu ^¬ tet present by means of a block. 8 Since the frame 3, the fourth electrode 7 d and the single phase conductor 5 d are aligned coaxially with one another, a position of the gap can be determined almost arbitrarily in the circumferential direction.

With regard to the mode of operation, design of the gap, a table, measuring devices etc. of the alternative embodiment of an insulator arrangement according to FIG. 6, the above explanations of the exemplary embodiment according to FIGS. 1, 2, 3, 4 and 5 are analogously applicable.

Claims

claims

1. Insulator arrangement comprising an insulating body (1, la) and at least one insulating body (1, la) in the direction of a main axis (2) from a first end side to a two ^¬ th end side passing through phase conductors (5a, 5b, 5c, 5d ), which is encompassed substantially transversely to the main axis (2) by an electrode (7a, 7b, 7c, 7d),

d a d u r c h e c e n c i n e s that

the electrode (7a, 7b, 7c, 7d) of a gap (9) by ^¬ sets, in particular completely interspersed, which interrupts a completely closed circulation of the electrode (7a, 7b, 7c, 7d).

2. Insulator arrangement according to claim 1,

d a d u r c h e c e n c i n e s that

the electrode (7a, 7b, 7c, 7d) is penetrated in the radial direction by the gap (9).

3. insulator arrangement according to claim 1 or 2,

d a d u r c h e c e n c i n e s that

In a lateral surface of the insulating body (1, la) connecting lateral surface a blind hole-like pocket (10) opens, which extends in the direction of the gap (9).

4. The insulator arrangement according to claim 1, wherein:

the electrode (7a, 7b, 7c, 7d) can be contacted via an electrically conductive connection passing through the insulating body (1, 1a).

5. insulator arrangement according to one of claims 1 to 4, characterized in that the insulating body (1, la) of an electrically conductive frame (3, 3a), in particular a metallic frame (3, 3a) is surrounded, which via an electrically conductive connection (11) with the electrode (7a, 7b, 7c, 7d ) connected is .

6. Insulator arrangement according to one of claims 4 to 5, d a d e r c h e c e n e c i n e that t

the electrically conductive connection (11) is in contact with the electrode (7a, 7b, 7c, 7d) in the region of the gap (9).

7. Insulator arrangement according to one of claims 1 to 6, d a d u r c h e c e n e c i n e that t

in the gap (9) a magnetic field measuring device (12a, 12b) protrudes.

8. Insulator arrangement according to one of claims 4 to 7, d a d e r c h e c e n e c i n e that t

a current measuring device (12a, 12b) is arranged on the electrically conductive connection (11).

9. An insulator arrangement according to one of claims 1 to 8, characterized in that a

the phase conductor (5a, 5b, 5c, 5d) and the electrode (7a, 7b, 7c, 7d) are aligned coaxially with the main axis (2).

10. Insulator arrangement according to one of claims 1 to 9, d a d u c h e c e n e c e s in that e

a plurality of phase conductors (5a, 5b, 5c, 5d) distributed on a circular path (4) around the main axis (2) pass through the insulating body (1, 1a) and in each case essentially transversely to the main axis

(2) are encompassed by in each case one electrode (7a, 7b, 7c, 7d).

11. insulator arrangement according to claim 10,

d a d u r c h e c e n c i n e s that

each of the electrodes (7a, 7b, 7c, 7d) is penetrated by a gap (9) extending essentially radially to the main axis (2).

12. The insulator arrangement according to claim 5, wherein:

the frame (3, 3a) rotates coaxially with the main axis (2).

13. An insulator arrangement according to one of claims 1 to 12, characterized in that a

the electrode (s) (7a, 7b, 7c, 7d) are completely enclosed by the insulating body (1, 1a).

14. Insulator arrangement according to one of claims 1 to 13 d a d u r c h e c e n e c i n e that t

the phase conductor (5a, 5b, 5c, 5d) with the insulating body (1, la) form a rigid-angle composite.

15. An insulator arrangement according to one of claims 1 to 14, characterized in that a

the insulating body (1, la) is disc-shaped.

16. Insulator arrangement according to claim 15,

d a d u r c h e c e n c i n e s that

the disk-shaped insulating body (1, la) has a profiling.

17. Insulator arrangement according to one of claims 5 to 16, characterized in that via the frame (3, 3a) an access (6a, 6b) to the blind-hole-like pocket (10) is given.