EP1691388B1 - Plug and socket connector - Google Patents

Abstract

The connector has a plug assigned to a lead-through conductor of a switch outgoing line, and a socket assigned to a switching chamber of a pole. The socket has a hollow space (34), a stud and a screwable retaining pin to establish a detachable connection with the chamber, and a contact support surface (33) is supported on a casing surface of the chamber. The space disemboguing in the surface (33) is provided to retain the stud and pin. An independent claim is also included for an isolated-phase or multiple-phase high voltage switch comprising switch poles.

Description

TECHNICAL AREA

The present invention relates to a pole of a single-phase, multi-phase high-voltage circuit breaker according to the preamble of claim 1. The invention further relates to a high voltage switch having a plurality of these poles.

Single-phase encapsulated multiphase high voltage switches are mainly circuit breakers, isolators or earth electrodes and each comprise a plurality of poles, which are each assigned to one of the phases. Each pole contains an insulating gas-filled metal encapsulation with an active part. Such an active part is connected via two encapsulation passages with high voltage and comprises at least one switching point with a contact arrangement, which is arranged in the formation of the high-voltage switch as a circuit breaker in general in a switching chamber.

The aforementioned pole has a plug connection which contains two contact pieces. One of these contact pieces is assigned to a feedthrough conductor guided through the encapsulation, a second to the active part of the pole. The feedthrough conductor is part of a drain and may be associated with an outdoor bushing, a cable termination, or an encapsulated device such as a busbar. Therefore, the feedthrough conductors of the individual poles are generally angled to each other. For outdoor bushings, this is especially necessary in order to be able to comply with the insulation distances between the individual phases. Since the contact arrangements provided in the individual switch poles each contain at least one movable contact piece, this switch requires a transmission for each switch pole, with the power from a drive on the Contact arrangement is transmitted. This force can be generated by a single central drive or by a plurality of each one of the switch poles associated drives. In any case, all gears are aligned the same. Therefore, it is necessary to adjust the active parts to the angular position of the feedthrough conductor.

STATE OF THE ART

A connector of the type mentioned is described in US Pat. No. 6,495,785 B1 , This connector is used for power transmission in a switch pole of a three-phase high-voltage switch with encapsulated executed switch poles, by the encapsulation of each two power connections are performed. According to Figure 5, the plug-in connection is arranged in the enclosure 40 and has a plug designed as a contact piece, which is formed in a free end of a centrally guided conductor 45 of an outdoor bushing 41, and designed as a socket contact piece, which in a hollow metal fitting 43rd a held in Kapselungsinneren switching chamber is formed. As can be seen from Figure 1, the outdoor bushings of the individual phases are mutually angled. The insulation distances of the air-guided ends of the individual feedthrough conductors are thus maintained. In the switching chambers provided switching points are each acted upon by a transmission with force. The force is generated in a single drive acting on all gears. To ensure a simple transmission of power from the drive to all transmissions, the gears must be aligned the same. Therefore, the switching chambers in the region of the connectors must be adapted to the angular positions of the feedthrough conductors.

Out DE 39 04 439 A1 is also a pole according to the preamble of claim 1 is known.

PRESENTATION OF THE INVENTION

The invention, as set forth in the claims, the object is to provide a pole of the type mentioned, which allows a simple and cost-effective production of both the poles of a multi-phase high-voltage switch and the switch.

In the inventive pole of a single-phase encapsulated, multi-phase high-voltage switch with the axially symmetric running active part and with the connector, the contact piece of the connector in a number of phases corresponding number of positions on the active part can be fixed. These positions are offset from one another by a predetermined angle in the circumferential direction determined by the axis of symmetry.

The plug-in connection of the pole according to the invention has a contact piece with a contact support surface which can be supported on a lateral surface of an axisymmetric active part of the pole, as well as a part of an element for producing a detachable connection with the active part. The supportable on the active part contact piece of this connector can therefore be practically fixed in any position on the lateral surface on the active part. At the same time eliminates the costly molding a designed as a socket contact piece of the connector in the active part.

In general, it is sufficient if the attachable to the active part contact piece of the connector in one of the number of phases corresponding number of positions on the active part is fixed, which positions are offset in the determined by the symmetry axis circumferential direction against each other by a predetermined angle.

The assembly of the connector is facilitated by the fact that the contact piece has at least one opening into the contact support surface cavity for receiving an attachable to the active part connecting element.

A simple setting of the contact piece on the active part is made possible in that the connecting element is a screwed into an internal thread of the active part retaining bolts.

The contact piece advantageously has at least one second cavity opening into the contact support surface for receiving a second connecting element which can be inserted into the active part. The practically arbitrarily positionable Konktaktstück the connector can then be held during assembly very accurately in a desired position on the lateral surface of the active part and then releasably secured by means of a suitable connecting means on the active part. Since the contact piece is then held with two points on the active part, a rotationally secured attachment is achieved at the same time. If the second connecting element is a pin which is held in a form-fitting manner in the contact piece, then the adjustment work during assembly is considerably facilitated.

To compensate for axial compensation movement of the connector, one of the two contact pieces of the connector is designed as a plug and the other as a socket.

A good current transfer and a simple attachment of the connector are caused by the fact that the jack is designed as a cup, that the inner wall of the cup holds at least one radially deformable annular contact element, and that the retaining pin receiving cavity is guided through the bottom of the cup. The fixation of the retaining bolt and thus the connector on the active part can be done for example by screws or clamp connection.

When a high voltage switch with multiple switch poles, which each have two held on a tubular part of the enclosure pipe extensions for holding each outlet, of which at least one is electrically connected via the connector according to the invention with the active part, the active parts of the switch poles are parallel to each other arranged in a plane and take with respect to their symmetry axes a uniform angular position. At the same time held on the active part contact piece of a first of the switch poles relative to the contact piece of a second of the switch poles is rotated by a predetermined by the direction of the two pipe approaches angle about the axis of symmetry of this active part.

BRIEF DESCRIPTION OF THE FIGURES

Fig.1

eine Seitenansicht eines als Leistungsschalter ausgeführten dreipoligen Hochspannungsschalters, dessen senkrecht zur Zeichnungsebene ausgerichteten und von einem gemeinsamen Antrieb betätigbaren Schalterpole jeweils mindestens eine Steckverbindung, und

Fig.2

eine Aufsicht auf einen in Steckrichtung geführten Schnitt durch eine der Steckverbindungen gemäss Fig.1.

With reference to drawings, an embodiment of the invention will be explained in more detail below. Hereby shows:

Fig.1

a side view of a designed as a circuit breaker three-pole high-voltage switch, which is aligned perpendicular to the plane of the drawing and actuated by a common drive switch poles each at least one connector, and

Fig.2

a plan view of a guided in the insertion direction section through one of the connectors according to Fig.1.

WAYS FOR CARRYING OUT THE INVENTION

In all figures, like reference numerals refer to like-acting parts. In Fig.1 a three-pole high voltage switch is shown, the three poles P _R , P _S , P _{T are} each associated with a phase R, S, T of an alternating current. The switch is designed as a circuit breaker. Each switch pole contains a predominantly tubular and with an insulating gas, such as Schwefelhaxafluorid and / or nitrogen, under a pressure of up to several bar filled encapsulation 10 and two executed as outdoor bushings 20 outlets. Since the tube axis of each encapsulation 10 runs perpendicular to the plane of the drawing, only one of the two outdoor bushings 20, namely 20, can be seen. From the encapsulation 10 formed from a metal, such as steel or aluminum, only a cover 11 and a tubular extension 12 (only designated at the pole P _R ) can be seen in FIG.

The lid 11 is curved on the side facing the viewer to the outside and carries a disposed inside the enclosure 10 gear GR, GS resp. GT, which is assigned to one of the three switch poles. The transmission acts on an electrically insulating designed push rod for actuating a contact arrangement. This contact arrangement is part of an axially symmetrical switching chamber (not shown in FIG. 1) arranged in the interior of the encapsulation 10 visible). The transmission has a gas-tight guided through the lid 11 shaft. Guided by the lid 11 ends of the transmission G _s associated shaft are connected via two horizontally guided coupling rods K with the outer shaft ends of the gear G _R and G _T. In addition to the transmission also not shown in Figure 1 switching chamber is attached to the lid 11. The lid 11 closes the enclosure 10 gas-tight to the outside.

The transmission G _S is connected to a central drive A. Instead of a central drive A and coupling rods K but also separate drives can be provided, which are each connected to one of the transmission.

The pipe socket 12 carries the outdoor bushing 20 and an undesignated core of a current transformer. An offset along the tube axis of the enclosure 10 arranged (not apparent from Figure 1) second pipe socket carries the second outdoor bushing and another Stromwandlerkern. Instead of an outdoor bushing 20 may also be a cable termination or an encapsulated device, such as a bus bar, provided.

A feedthrough conductor of the outdoor bushing 20 is electrically connected via a plug connection with a current-carrying part of the switching chamber (not visible in FIG. 1). The same applies to the implementation manager of Figure 1 not apparent outdoor bushing, which is electrically connected to a current-carrying part of the switching chamber, which is kept electrically isolated with the switching chamber open against the aforementioned switching chamber part.

From Figure 2, the structure of the not apparent from Figure 1 connector 30 can be seen. This connector includes two designed as a plug and a socket contacts 31, 32, of which the contact piece 31 is associated with the guided through the enclosure 10 hollow feedthrough conductor 21 of the outdoor bushing 20 and the contact piece 32 of the acting as an active part of the switch pole P _S switching chamber 40 assigned. The contact piece 32 is formed as a cup and has on the outside of the cup bottom on a lateral surface of a Hollow body 41 executed live part of the switching chamber 40 supportable contact bearing surface 33. In the bottom of the cup opening into the contact surface 33, formed as a through hole cavity 34 is formed. This cavity 34 receives a connecting element 35, which is designed as a screwable retaining bolt and screwed into an internal thread of the hollow body 41 of the switching chamber 40. With the help of this connecting element 35, the contact piece 32 is releasably attached to the hollow body 41. In order to keep the power losses low, the lateral surface of the hollow body 41 has a mating contact surface cooperating with the contact bearing surface. The contact bearing surface 33 and the mating contact surface are generally planar, but may also be curved.

From Fig.2 are also coincident with the axis of the enclosure 10 symmetry axis 42 of the axisymmetric switching chamber 40, the actuation of the switching chamber 40 enabling insulating rod 43 and the switching chamber 40 on the cover 11 supporting isolator 44 shown. Furthermore, it can also be seen from this figure that a cavity opening into the contact support surface 33 for receiving a connecting element 37 designed as a pin is formed in the contact piece 32. The pin 37 in turn is held in an opening into the mating contact surface cavity of the hollow body 41. The pin and the associated cavities on the contact piece 32 and the hollow body 41 may have a round profile. To achieve positive locking angular, oval or any other profile is beneficial.

When attaching the contact piece 32 to the switching chamber 40, the contact piece 32 is first positioned by means of the pin 37 on the formed as a mating contact surface portion of the lateral surface of the hollow body 41. If the pin is held in a form-fitting manner, then the cavity 34 and the internal thread provided in the switching chamber are in line and now the contact piece 32 can be fixed directly to the switching chamber 40 without further adjustment work with the aid of the screw bolt 35.

The inner wall of the cup carries radially deformable, annular contact elements 36 which the current transition between the two contact pieces 31 and 32nd facilitate. As can be seen, in this case, the contact 31 formed as the end of the feedthrough conductor 21 is inserted into the interior of the cup.

The provided on the hollow body 41 mating contact surface is advantageously designed so that the contact piece 32 is fixed in at least two positions on the hollow body 41, which are offset in the circumferential direction by a predetermined angle to each other. It can then namely arranged in the individual Polkapselungen 10 switching chambers 40 and gear G _R , G _S resp. G _{T are held} relative to the symmetry axes 42 in each case in a uniform angular position.

The held in the enclosures 10, not apparent from Figure 1 switching chambers 40 are arranged parallel to each other in a horizontal plane and are as well as the transmission G _R , Gs resp. G _T with respect to the plane perpendicular to the plane of symmetry axes 42 (not designated in Figure 1) in the circumferential direction in a uniform angular position.

In order to comply with the prescribed isolation distances of the outside of the enclosure 10 located portions of the phase conductors R, S, T, the outdoor bushings 20 and, accordingly, the encapsulations 10 adjacent phases are rotated by a fixed angle of for example 30 ° to each other. Since a uniform angular position of all switching chambers is determined by the drive, are in switches according to the state of

Technology ( US Pat. No. 6,495,785 B1 ) requires three different types of switching chambers, each with the fixed angle deviating from each other into the switching chamber housing incorporated bushings. By contrast, formed as a socket contact piece 32 of the connector 30 can be fixed in different angular positions on the current-carrying hollow body 41 of the switching chamber 40. Therefore, all three switch poles P _R , P _S , P _{T can} each be equipped with a single type of switching chamber.

The high voltage switch can also be designed as a disconnector or earthing switch. The active part is then generally no longer designed as a switching chamber 40 and contains substantially only the acted upon by the transmission with force Kontaktanordung.

LIST OF REFERENCE NUMBERS

10

encapsulation

11

cover

12

pipe extension

20

Departure, outdoor passage

21

Through conductors

30

connector

31.32

contacts

33

Contact support surface

34

cavity

35

Connecting element, retaining bolt

36

contact elements

37

Connecting element, pin

40

Switching chamber, active part

41

hollow body

42

axis of symmetry

43

insulating

44

support insulator

A

drive

G _R , G _S , G _T

transmission

K

coupling rods

R, S, T

phase conductor

P _R , P _S , P _T

Switch poles, poles

Claims (8)

1. Pole (P_R, P_Y, P_B) of a single-phase-encapsulated, polyphase high-voltage switch having an axially symmetrical active part (40) and having a plug connection (30), with the plug connection (30) having two contact pieces (31, 32), a first (31) of which is associated with a bushing conductor (21), which is passed through the encapsulation (10), of a switch outgoer (20), and the second (32) of which is associated with the active part (40) of the pole, with the second contact piece (32) having a contact facing surface (33), which can be supported on an envelope surface of the active part (40), as well as a part (34, 35, 37) of an element for producing a detachable connection to the active part (40), characterized in that the second contact piece (32) of the plug connection (30) can be fixed to the active part (40) at a number of positions corresponding to the number of phases, which positions are offset through a predetermined angle with respect to one another in the circumferential direction, as defined by the axis of symmetry (42).
2. Pole according to Claim 1, characterized in that the second contact piece (32) has at least one cavity (34), which opens into the contact facing surface (33), for holding a connection element (35, 37) which can be fitted to the active part (40).
3. Pole according to Claim 2, characterized in that the connection element is a holding bolt (35) which can be screwed to an internal thread in the active part (40).
4. Pole according to one of Claims 2 or 3, characterized in that the second contact piece (32) has at least one second cavity, which opens into the contact facing surface (33) for holding a second connection element (37) which can be plugged into the active part (40) .
5. Pole according to Claim 4, characterized in that the second connection element is a pin (37) which is held with an interlock in the second contact piece (32).
6. Pole according to one of Claims 1 to 5, characterized in that the first contact piece (31) is in the form of a plug, and the second (32) is in the form of a socket.
7. Pole according to Claim 6, characterized in that the socket is in the form of a cup, in that the inner wall of the cup holds at least one annular contact element (36) which can be deformed radially, and in that the cavity (34) which accommodates the holding bolt (35) is passed through the base of the cup.
8. High-voltage switch having a plurality of poles (P_R, P_Y, P_B) which are each designed according to one of Claims 1 to 7 and each have tubular attachments (12), which are held on a tubular part of the encapsulation (10), for holding in each case one outgoer (20) which is electrically conductively connected via the plug connection (30) to the active part (40), characterized in that the active parts (40) of the switch poles (P_R, P_Y, P_B) are arranged parallel to one another on one plane and assume a uniform angular position with respect to their axes of symmetry (42), and in that the second contact piece (32) of a first (P_R) of the switch poles is arranged rotated through an angle which is predetermined by the direction of the two tubular attachments (12) about the axis of symmetry (42) of this active part, with respect to the second contact piece (32) of a second (P_Y, P_B) of the switch poles.

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