DE102009005323A1 - Multipole-cable connection for use in level measurement device in liquid container in pressurized water reactor, has bushes whose ends moves consequently from connector and coupler to overlap region of socket's end parts that lie on axis - Google Patents

Abstract

The connection (2) has a coupler (8) that is connected with a plug connector (6), where wires (4) are attached at the coupler. Wires are connected with each other by assembly of connector and coupler. The connector and the coupler are partially accommodated in a plug socket (10), where another plug socket (12) is coaxially arranged to the former socket. Two oppositely-lying ends of the bushes move consequently from the connector and the coupler to an overlap region (40) of end parts of the sockets in an assembled condition of the connection, where the end parts are lying on a center axis.

Description

The The invention relates to a multipole cable connection to the electrical conductive connection of a plurality of wires.

Measuring cable connections for level sensors using the a heated thermocouple generated thermal voltage to the level height is closed in a liquid container, are used in particular in nuclear power plants.

It is a universal housing for a high-density connector from the DE 10 2007 026 815 A1 known. The universal housing has a base shell and a lid shell attached to the base shell. The connector consists of a plug part and a socket part, wherein the socket part of the base shell or the cover shell and the plug part of the other shell is assigned. In the base shell and in the cover shell in each case an adapter is pushed, whose outer contour is adapted to the inner contour of the base shell or the cover shell and whose inner contour is complementary to the outer contour of the socket part or the plug part.

By a modification of the adapter is the universal housing thus adaptable to various connectors and seals them safe off. In this arrangement, in particular socket and plug are about a bayonet joint connected. The connection is via a plug-in rotary movement. The two parts to be joined intertwined. Almost perpendicular to the direction of insertion are elongated in both parts at the junction Elevations attached. These do not run all around, but are interrupted, otherwise the nesting would not be possible. Because the elevations are only slightly oblique in the plane perpendicular lie to the direction of insertion, both parts are by a rotary motion pressed against each other. The bayonet lock works so to speak like a thread.

A Such a compound does not comply with the so-called LOCA standard, because the connection is especially in certain catastrophic situations Relieves comparatively easily. With LOCA (Loss Of Coolant Accident) is referred to in the nuclear engineering an accident, in which by a leak coolant from the cooling circuit of the nuclear reactor emerges. A big coolant loss accident is usually the basis for the design of the residual heat removal and emergency cooling systems and the containment a nuclear reactor. This is the complete break of a Main coolant line assumed. Ideally should a cable connection used in a nuclear reactor also after the occurrence of a LOCA event and possibly also with strong seismic and / or Radiation-induced external influence placed on them fulfill functional requirements safely. this applies at least if they are inside an accident monitoring system (Post Accident Monitoring System, PAMS) should be used.

Of the Invention is based on the object, a cable connection to the electric conductive connection of a plurality of wires, in particular for the Use of a cable connection for level measurement in a nuclear reactor, such that a large Number of wires readily in a first and at least one associated second socket can be accommodated in a simple manner can, with the design using only a few components simple, inexpensive and particularly susceptible to interference should be designed.

These The object is achieved by a cable connection with a plug and one with the plug connectable coupling, to each of which the wires are connected, by joining the plug and the coupling together are connectable, with plug and coupling each in a socket and a coaxially arranged further socket at least partially are taken and in each case the two opposite Ends of the sockets of plug and coupling in assembled condition the cable connection in an overlapping region of the two opposite End portions of the bushes are pushed one on top of the other.

The Invention is based on the consideration that it is always possible should be a very large number of wires in a plug and a clutch and to accommodate them in sockets of multipole cable connection. It should be connected to each other sockets and the associated Components can be easily and inexpensively designed without the reliability of the Muitipol cable connection is impaired becomes. Furthermore, to reduce costs with a minimum of construction or lose parts are getting done. The reduction of the loose parts contributes in particular, that the multipole cable connection significantly easier to assemble and therefore the necessary operating personnel with very heavy gloves an assembly or the assembly the multipole cable connection can do better. Because due the protective measure the loose parts are difficult to grip, During assembly, they can easily slip out of the operating staff and are then hardly usable again.

It is advantageous that the two sockets of connector and coupling are aligned coaxially with each other, pushed into each other and can be aligned so that in each case the two opposite ends of the sockets of the plug and the coupling in the assembled state of the cable connection in an overlapping region sit on each other, that support each other in this area. The overlap region advantageously has a length which corresponds approximately to the outer diameter of the multipole cable connection. This ensures that plug and coupling are very well secured and they can not solve themselves even under extreme stress. The advantageous embodiment of the nested bushes increases the stability of the multipole cable connection and at the same time also creates a great deal of space for accommodating numerous cables or wires.

The Compound is also improved by having in an overlap area, in which the two opposite ends of the two jacks over each other are pushed, at least one screw is provided, the firmly connect the two sockets. With the help of the screw The two opposite ends of the coaxial to aligned bushes firmly pressed against each other and thereby creating a pressurized water resistant connection. Furthermore, will This ensures that the contact elements of plug and Clutch fit perfectly against each other, so that the electrical Resistors at the junctions between the contacts can be kept low and a very good, low-loss Current flow can be ensured.

Prefers The first socket and / or the second socket each have a contact part on, by means of the screw against each other to the plant brought are. As a result, as already mentioned, a good connection created between the contacts of plug and coupling and thus also a safe interference-free connection, the earthquake-proof, LOCA-safe and radiation-resistant, the means, can withstand extreme loads.

In an advantageous development has at least one in each case the first and the second socket recorded on another socket one end a pressure element and / or centering on, against each one adjustable via another screw Counterpart is pressed. The centering element and the associated counterpart are each designed as a cone, which is in operative connection with the screw and at the second or the recorded in the first socket further socket at least is present or connected in one piece with this.

Further is suitably provided that the further comprises a threaded part against the cone fitting screw, that with a threaded part of the outer socket in Connection stands.

advantageously, the outer socket is the plug of the cable connection associated with the screw, which operatively connected to the socket stands and a threaded portion of the coaxial opposite second outer jack is connected, the associated with the coupling of the cable connection. It is advantageous between the outer and the inner socket one Anti-rotation device provided. With the help of the screw is how already explained, one against strong shocks safe, interference-free multipole cable connection created. Through the two nested bushes is the stability of the multipole cable connection essential improved and plenty of space in the sockets to accommodate the numerous veins or cable created without additional components for the stability of the multipole cable connection would be required.

Preferably comprise at least one plug part and a coupling part respectively at least the telescoping bushes, wherein the plug and the coupling part in each case by means of a securing element with a part of a housing, in particular an insulator the housing of the connector and / or the coupling, medium or are directly connected. The anti-rotation device carries essentially helping to make the multipole cable connection does not solve on its own.

As already mentioned at the beginning, it is particularly advantageous that the plug and the coupling part each assigned a screw is, wherein the one screw of the male part respectively to the Housing of the plug and the second screw by means a rotation against a flange of the cable connection which is connected to part of the nuclear installation.

A perfect and safe support is achieved by that the flange connected to the nuclear installation is the cable connection supported on the plant of the reactor.

Advantageous is further that the flange element of the cable connection in mounted State of the multipole cable connection between one on the outside Socket of the plug part provided flange or the screw and the screw element of the coupling part is arranged.

Further, it is advantageous that in each case a cable hose is pulled on the outer socket of the plug and the coupling part and one or more ring fuses and / or ring seals provided between the cable hose and socket are. The cable tube can also be mounted as a shrink tube, which seals the inner parts very well against moisture.

Advantageous it is also that the two cones are opposite Have contact surfaces between which a ground wire the cable connection is clamped. In addition, it is advantageous if the first outer socket of the plug part and the subsequent, coaxially arranged second outer sleeve of the coupling part sealed against each other at least via a sealing element are provided in the overlap area of the two jacks is.

Preferably are on the cables each at their ends pins or contact sockets connected in a plug and a coupling housing taken up and shed in these in a plastic compound, extending to the inner wall of the plug or the coupling housing and up to the other screw of the male part and the Screwing the coupling part extends.

The particular advantages of the invention are that a radiation-proof, earthquake-resistant (up to 10 g) and LOCA-qualified cable connection for use inside a nuclear reactor containment is provided, even in comparatively complex cases the functional requirements placed on them with regard to a reliable transmission of signal and supply voltages, especially with sometimes high voltage level, is fair, about as part of a system for level measurement in a reactor pressure vessel (Reactor Pressure Vessel Level Instrumentation, RPVLI for short). at the cable connection according to the invention is the required mechanical sta bility essentially by the outer housing parts, in particular the outer bushes, applied. In the interior stands thus with constant external dimensions more space for cables and connections than before available, especially when connecting novel thermocouple level measurement systems with for example up to 26 connection pins or more advantageous is. Further advantages of the new design are its easy handling and assembly, wherein in the assembled state of the cable connection all joints secured against unintentional loosening are.

One Embodiment of the invention will be described with reference to a drawing explained in more detail. Show:

1 a schematic representation of a multipole cable connection for the electrical connection of wires of a multi-core cable, in partial longitudinal section;

2 an enlarged view of the multipole cable connection according to 1 with some parts omitted and other parts highlighted for clarity;

3 an exploded view of a portion of the multipole cable connection according to 1 before assembly;

4 a cross section of the multipole cable connection along the line AA according to 2 ;

5 a schematic partial view of the multipole cable connection according to 1 ,

Same Parts are provided with the same reference numerals in all figures.

In 1 is in a partially sectioned side view and in 4 in cross-section a cable connection 2 for a sake of simplicity not shown here level measuring system shown. The level measurement effected with the level measuring system serves to monitor the level of a coolant in a reactor pressure vessel, not shown here.

A Such measuring device should also be used to monitor the Water inventory in the primary circuit in normal operating conditions and in case of coolant loss incidents, especially in the case of small leaks. This measurement is especially important if the usual Pressure level observed as level indicator no clear criterion for the degree of filling represents the reactor cooling circuit.

The used measuring methods based on the effect of different Heat transfer conditions in water or in steam, being a system of a heated and an unheated thermocouple depending on the present phase, different differential temperatures supplies. The measuring method chosen here is able to safe a phase change throughout the intended application to recognize and also in all operating conditions a clear Signal to deliver. For connecting the signal-carrying Cables of thermocouples and supply cables for the associated heating elements are located on the probe head a multi-pole, after explained in more detail below Embodiment, a 26-pin, detachable connector. For the wiring of all signal or supply lines From the probe head to the subdistributor is present in particular non-susceptible cable used.

At the subdistributor the probe cable becomes Terminal strips connected, which were used for the previously used Füllstandsmesssonden for the connection of the measuring signal lines and heating conductors. The signal lines of the thermocouples of the probe cable are connected directly to the already existing copper signal lines of the continuing cable. It is possible to dispense with the use of a reference junction in order to compensate for the thermal voltages that occur when connecting thermocouple lines to copper lines. In fact, these thermoelectric voltages do not affect the formation of the difference between the signals between heated and unheated thermocouple measuring points. Furthermore, in the sub-distributor for the four thermocouple pairs of a measuring probe in the exemplary embodiment, the selection and the division of the signal and heating lines are made on the redundancies associated with the relevant measuring probe.

each Heating element in the probes is powered by its own power supply supplied in an electronics cabinet, not shown in the drawing is provided. In the device is a corresponding Characteristic deposited, the correct heat output over ensures the working range of the probe. The output power is adapted to the temperature-related increase in the heating circuit resistance, a smooth signal swing from the difference to obtain the heated / unheated thermocouples. At a Short circuit or interruption in the heating circuit is a optical signaling on the device and an interference signal output.

The Power supply has a key switch on the front panel for switching on and off as well as digital instruments for the Display of output voltage and current. Also located on the front panel of the power supply LED displays for the message signals. The voltage and current balance is also to realize by potentiometer on the front panel. The power supply is housed in a rack and by various monitoring circuits completely protected against short circuit.

The Evaluation unit allowed by their flexible placement with module variants the use of circuit parts and specific settings with jumpers and solder bridges and connecting multiple level probe types.

All Assemblies can be pulled during operation and be plugged. For the duration of the contact process and module stabilization can be the output signals be disturbed by the system. These disorders will be fixed automatically after stabilization. A mechanical one Coding system prevents incorrect assembly. At a Full pin assignment may be on the realization a plug-in monitoring be omitted.

The multipole cable connection 2 serves for electrically conductive connection of a plurality of wires 4 , in particular for the use of a cable connection for level measurement in a liquid container. In the embodiment according to 1 . 2 . 4 and 5 are contact pins and contact sockets 70 illustrated in a plug housing 44 a plug 6 and in a clutch housing 48 a clutch 8th are included. In 4 is only the clutch housing 48 the clutch 8th shown in section. Depending on the embodiment, fewer or more contact ends of the cables may be used 4 in the connector housing 44 or the clutch housing 48 be recorded. This in 5 illustrated plug and coupling housing 44 . 48 is from an insulating body 60 Surrounded by the plug 6 and the clutch 8th tightly surrounds. To the in 5 illustrated contact pins and contact sockets 70 , respectively at the two end faces of the insulator 60 survive, the veins get over 4 soldered.

The contact ends of the cables or wires 4 are in the connector housing 44 and in the clutch housing 48 in a plastic mass 74 potted, which fills the whole housing and according to 1 and 2 up to a screw 22 a plug part 36 and a screw 24 a coupling part 38 extends. The contact ends in the coupling housing 48 the clutch 8th and in the connector housing 44 of the plug 6 are mainly designed as pins and according to 1 . 2 and 5 , as explained in more detail below, put together.

Like from the 1 and 2 shows, there is the multipole cable connection 2 in particular from the plug part 36 and the coupling part 38 with the help of a screw element 14 held together after the two parts are joined together.

The plug part 36 includes an outer socket 10 and an inner socket 18 and the coupling part 38 also an outer socket 12 and an inner socket 20 , The outer diameter of the two inner sockets 18 . 20 are chosen so that the outer socket shrunk onto the inner socket or the two sockets can be pushed together accurately. The entire interior of the socket 18 respectively. 20 is free in the ground state before mounting and essentially serves to accommodate the numerous wires 4 related to 2 to the plug 6 and the clutch 8th are firmly connected while the outer ends of the wires 4 through a pressure and / or zen trier element 26 . 28 and the adjoining further screw 22 respectively. 24 and a cable guide 23 and are guided from there to a level sensor, not shown in the drawing of a reactor plant or to an evaluation unit.

The pressure and / or the centering element 26 of the plug part 36 include a cone 30 . 32 , where the cone 30 concentric on the outer circumference of the cable guide 23 sits and with its conical surface against a conical surface of the counterpart or the opposite cone 32 abutting, which is integral with the inner socket 18 connected is. With the help of the further screw 22 becomes the cone 30 against the cone 32 and with it the socket 18 against a front side 76 of the connector housing 44 ( 1 and 2 ), so that in the assembled state of the multipole cable connection 2 the contact ends of plug 6 and clutch 8th flawless and intimate and thus ensure a safe and low-loss current flow.

The other screw 22 has a threaded part 64 ( 2 ), with a complementary threaded part 62 the outer socket 10 engaged, so by turning the screw 22 the contact pressure of the bush 18 on the front page 76 of the housing 44 of the plug 6 can be varied.

The outer socket 10 is the plug 6 the cable connection 2 with the screw 14 associated with the jack 10 is in operative connection and on a threaded part 34 the coaxially opposite second outer sleeve 12 connected to the clutch 8th the cable connection 2 assigned. It is between the outer sleeve 12 of the coupling part 38 and the outer socket grabbed by her 10 of the plug part 36 a rotation lock 46 ( 2 ) intended. The rotation lock 46 consists of one in the socket 12 taken in groove 19 ( 2 . 4 ) and one of the socket 20 protruding spring 21 , This will ensure that the plug part 36 and the coupling part 38 when assembling the multipole cable connection 2 be aligned with each other so that the jacks and plugs of the multipole cable connection 2 can be joined together easily.

Furthermore, the outer sleeve 12 an internal thread 80 ( 2 ) and one on an insulator 60 ( 1 . 5 ) of the clutch 8th provided external thread 82 ( 2 ), so that between the inner socket 20 and the insulator 60 the clutch 8th a screw connection can be made.

In addition to the rotation lock ( 2 ) is another security element 50 ( 2 ) for the plug part 36 and a fuse element 51 for the coupling part 38 intended. The fuse element 50 is with the socket 10 and the insulator of the plug 6 firmly connected, in particular welded. The fuse element 51 is with the outer socket 12 and one with a part of the clutch housing 48 ( 2 ), in particular the insulator 60 the clutch 8th , welded.

At least the plug part 36 and the coupling part 38 each comprise at least the telescoping bushings 10 . 18 . 12 . 20 , where the plug part 36 and the coupling part 38 each with the help of the fuse element 50 respectively. 51 with a part of the housing 44 . 48 in particular the insulator 60 ( 1 ) of the housing 44 . 48 of the plug 6 and / or the clutch 8th , are directly or firmly connected and secured.

Like from the 1 and 2 shows, the two lying on a common central axis end portions of the sockets 10 and 12 pushed over each other and form in 2 an overlap area 40 , in which the two Buchsenendteile are pushed precisely to each other and thus form a safe, very high loads exposable seat. In this overlap area 40 is also the groove 19 and spring 21 formed anti-rotation device 46 ( 2 ), in particular the exact assembly of plug part 36 and coupling part 38 guaranteed. This allows the multipole cable connection 2 be exposed to very high loads.

In the overlap area 40 in which the two opposite ends of the first 10 and second socket 12 are pushed over each other, at least the screw 14 provided that the two sockets 10 . 12 firmly together. The screw element 14 has for this purpose an internal thread on the on the second socket 12 provided external thread can be screwed. Furthermore, the outer sleeve comprises 10 of the plug part 36 a paragraph or flange 42 which is against the front end of the following, coaxial with the socket 10 of the plug part 36 arranged socket 12 of the coupling part 38 abuts when the screw 14 correspondingly far on the external thread of the second socket 12 was screwed ( 2 ).

A second screw 16 ( 1 ) is by means of a rotation lock 52 , which may be formed as a spring washer, against a flange 54 the cable connection 2 connected to a part of the nuclear installation. The flange element 54 serves to support the multipole cable connection 2 , By turning the on the outer jack 12 screwed screw 16 will be the rotation lock 52 against the flange element 54 pressed, so that, as already stated, an earthquake-proof support of the multipole cable connection 2 guaranteed in the reactor plant. The flange element 54 ( 1 ) of the cable connection 2 is thus in the assembled state of the multipole cable connection 2 between one on the outer jack 12 provided flange 13 or alternatively the screw 14 and the screw 16 of the coupling part 38 arranged and firmly clamped.

Each on the outer socket 10 . 12 of the plug part 36 and the coupling part 38 is a cable hose 56 . 57 ( 1 ) pulled or shrunk. The cable hose 56 . 57 secures the multipole cable connection 2 against moisture and impurities. A secure, tight fit of the cable conduit 56 . 57 This ensures that between cable hose 56 and 57 and socket 10 and 12 one or more ring fuses and / or ring seals 58 ( 2 . 3 ) are provided. Due to the annular elevations in particular slipping of the respective cable tube from the socket is reliably prevented.

The first outer socket 10 of the plug part 36 and the subsequent coaxially disposed second outer sleeve 12 of the coupling part 38 are at least about a sealing element 68 ( 2 ) sealed against each other, in the overlap area 40 the two socket 10 . 12 is provided. The sealing element 68 is designed so that the veins 4 receiving space is protected against pressure and thus against ingress of water and pollution.

The two cones 30 . 32 have opposite contact surfaces 66 ( 2 ), between which a cable shield 78 ( 2 ) of the metallic sheath not shown here in the cable connection 2 guided veins 4 is trapped. As a result, the internal structure of the plug part 36 simplified, as for the grounding of the multipole cable connection 2 no further components are required.

3 shows in the manner of an exploded view of the plug-side part of the multipole cable connection 2 before assembly. For mounting the contact insert with the insulating part 60 , the inner socket 18 , the centering element 30 and the screw 22 successively in the outer socket 10 pushed or screwed. After assembling the individual parts of the connecting cables or wires 4 surrounding interior of the inner socket 18 as already explained above, with a plastic sealant, in particular based on silicone, shed. The not shown on the jack side part of the multipole cable connection 2 is in principle a mirror image symmetrical structure, but has in the connection or overlap area 40 an outer socket 12 with enlarged inner diameter on the male side outer connector 10 pushed and then with the plug side arranged screw 14 can be locked. In addition, the socket-side contact insert naturally has complementary contact elements with respect to the plug-side contact insert. About the screw elements 22 and 24 and the inner sockets 18 . 20 The two contact inserts are pressed securely against each other.

2

Multi-cable connection

4

Vein, electric wire

6

plug

8th

clutch

10

outer Rifle

12

outer Rifle

13

flange

14

screw

16

screw

18

inner Rifle

19

groove

20

inner Rifle

21

feather

22

additional screw

23

Kabelflührung

24

additional screw

26

Pressure element centering

28

Pressure element centering

30

cone

32

cone

34

threaded part

36

plug part

38

coupling part

40

overlap area

42

Plant part, Flange, heel

44

plug housing

46

rotation

48

clutch housing

50

fuse element

51

fuse element

52

rotation

54

Flange, flange

56

umbilical cord

57

umbilical cord

58

Safety Ring, ring seal

60

Insulation, insulator

62

threaded part

64

threaded part

66

contact surface

68

sealing element

70

Pin, Contact socket

74

Plastic compound

76

front

78

shielding

80

inner thread

82

external thread

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• DE 102007026815 A1 [0003]

Claims (16)

Multipole cable connection ( 2 ) for the electrically conductive connection of a plurality of wires ( 4 ), in particular for use in a device for level measurement in a liquid container, with a plug ( 6 ) and one with the plug ( 6 ) connectable coupling ( 8th ), to each of which the wires ( 4 ) are connected by joining connectors ( 6 ) and coupling ( 8th ) are connectable to each other, wherein plug ( 6 ) and coupling ( 8th ) in each case in a socket ( 10 ) and a coaxially arranged further bushing ( 12 ) are at least partially received and in each case the two opposite ends of the sockets ( 10 . 12 ) of plug ( 6 ) and coupling ( 8th ) in the assembled state of the cable connection ( 2 ) in an overlapping area ( 40 ) of the two lying on a central axis end portions of the bushes ( 10 . 12 ) are pushed towards each other. Cable connection ( 2 ) according to claim 1, wherein in the overlapping area ( 40 ), in which the two opposite ends of the two sockets ( 10 . 12 ) are pushed over each other, at least one screw ( 14 ) is provided, the two sockets ( 10 . 12 ) firmly together. Cable connection ( 2 ) according to claim 1, wherein the first socket ( 10 ) and / or the second socket ( 12 ) one part of the installation ( 42 ), which by means of the screw ( 14 ) can be brought against each other to the plant. Cable connection ( 2 ) according to claim 1 or 2, wherein at least one respectively in the first and the second socket ( 10 . 12 ) recorded further socket ( 18 . 20 ) at one end a pressure element and / or Zentrierele element ( 26 . 28 ), against each one via a further screw ( 22 . 24 ) adjustable counterpart is pressed. Cable connection ( 2 ) according to claim 4, wherein the centering element ( 26 . 28 ) and the associated counterpart each as a cone ( 30 . 32 ) are formed, wherein the cone ( 30 ) with the screw element ( 22 ) is in operative connection and the cone ( 32 ) at the second or in the first socket ( 10 . 12 ) received another socket ( 18 . 20 ) at least rests or is connected in one piece with this. Cable connection ( 2 ) according to claim 5, wherein the further against the cone ( 30 ) adjoining screw element ( 22 ) a threaded part ( 62 ), which with a threaded part ( 64 ) of the outer sleeve ( 10 ). Cable connection ( 2 ) according to claim 1, wherein the outer sleeve ( 10 ) The plug ( 6 ) of the cable connection ( 2 ) with the screw element ( 14 ) associated with the socket ( 10 ) is in operative connection and to a threaded part ( 34 ) of the coaxially opposed second outer sleeve ( 12 ) connected to the clutch ( 8th ) of the cable connection ( 2 ), wherein between the outer and the inner socket ( 12 . 20 ) a rotation lock ( 46 ) is provided. Cable connection ( 2 ) according to one of claims 1 to 7, in which at least one plug part ( 36 ) and a coupling part ( 38 ) at least the telescoping bushes ( 10 . 18 . 12 . 20 ), wherein the plug part ( 36 ) and the coupling part ( 38 ) each with the aid of a fuse element ( 50 ) with a part of a housing ( 44 ), in particular an isolator ( 60 ) of the housing ( 44 ) of the plug ( 6 ) and / or the coupling ( 8th ), medium or directly fixed. Cable connection ( 2 ) according to claim 1, wherein the plug part ( 36 ) and the coupling part ( 38 ) one screw element each ( 14 . 16 ), wherein the screw element ( 14 ) of the plug part ( 36 ) each to the housing ( 44 ) of the plug ( 6 ) and the second screw element ( 16 ) by means of a rotation lock ( 52 ) against a flange element ( 54 ) of the cable connection ( 2 ), which is connected to a part of the nuclear installation. Cable connection ( 2 ) according to one of Claims 1 to 9, in which the flange connected to the nuclear installation ( 54 ) the cable connection ( 2 ) is supported on the plant of the reactor. Cable connection ( 2 ) according to one of claims 8 and 9, in which the flange element ( 54 ) of the cable connection ( 2 ) in the assembled state of the multipole cable connection ( 2 ) between one on the outer sleeve ( 12 ) provided flange ( 13 ) or the screw element ( 14 ) and the screw element ( 16 ) of the coupling part ( 38 ) is arranged. Cable connection ( 2 ) according to any one of the preceding claims, wherein each of the outer bushes ( 10 . 12 ) of the plug part ( 36 ) and the coupling part ( 38 ) each a cable hose ( 56 . 57 ) and between cable conduit ( 56 ) and socket ( 10 . 12 ) one or more ring fuses and / or ring seals ( 58 ) are provided. Cable connection ( 2 ) according to claim 5, wherein the two cones ( 30 . 32 ) opposite abutment surfaces ( 66 ), between which a cable shield ( 78 ) of the cable connection ( 2 ) is trapped. Cable connection ( 2 ) according to any one of the preceding claims, wherein the first outer sleeve ( 10 ) of the plug part ( 36 ) and the subsequent coaxially disposed second outer sleeve ( 12 ) too at least via a sealing element ( 68 ) are sealed against each other in the overlapping area ( 40 ) of the two sockets ( 10 . 12 ) is provided. Cable connection ( 2 ) according to one of the preceding claims, in which the cables ( 4 ) each at their ends pins and contact sockets ( 70 ) connected in a plug and a coupling housing ( 44 . 48 ) and in these in a plastic mass ( 74 ), which extend to the inner wall of the plug or the coupling housing ( 44 . 48 ) and to the other screw ( 22 ) of the plug part ( 36 ) and the screw element ( 24 ) of the coupling part ( 38 ). Nuclear plant, in particular pressurized water reactor, with a cable connection ( 2 ) for a level monitoring according to one of the preceding claims 1 to 15.