CN1178351C

CN1178351C - Electric coupling element for switchgear

Info

Publication number: CN1178351C
Application number: CNB99110613XA
Authority: CN
Inventors: 克劳斯・克雷斯; 克劳斯·克雷斯
Original assignee: Siemens AG
Current assignee: Siemens AG
Priority date: 1998-08-14
Filing date: 1999-07-20
Publication date: 2004-12-01
Anticipated expiration: 2019-07-20
Also published as: CN1245357A; DE19838358A1; DE19838358B4

Abstract

Electrical couplers or isolators for switch and control gear having contact bushings (grommets) with contact terminals with the gas-filled switch rooms. The contact grommets (KD) are made as synthetic resin parts and each has a deflector plate (DB) and deflector electrode (DE). The grommets (KD) each contain a control electrode (SE) with an external configuration extending, at least in parts, parallel to the obliquely bent deflector electrodes (DE), and are provided with sealing covers (VA) so that over a first screen (LS1), the inner region of the grommet (KD) is contacted at the switching potential, and over a second screen (LS2), the outer region of the grommets (KD) is contacted at earth potential.

Description

The charge coupled device of switching device

Technical field

The present invention relates to a kind ofly be used for by metal-back encapsulation, gas-insulated and have the charge coupled device of switching device that cover is drawn in contact, this contact is drawn to be enclosed within and is had the contact binding post in the air chamber, and these binding posts are connected by the outer switch current potential of the lead that removably connects with Connection Element and air chamber.

Background technology

By DE 40 01 909 A1 known be used for being mounted on the coupling element of the cylinder manifold device of gas isolated switching device separately.At this, the bus-bar of two switching devices disposes plug pin respectively in its end, and these plug pins are plugged in the corresponding jack of coupling device, realizes that thus the conduction between the switching device connects.Described coupling device is respectively by deriving in the gas-insulated container of fairlead by switching device, and utilizes sealing gland connector and external insulation between the switching device.

These connectors are made by electric conducting material, and adopt elastic seal ring to compress with each sidewall of switching device by bolt to be tightly connected mutually.Simultaneously, the outer surface of the switching device that joins with earth potential is also interconnected by these connectors and conducts electricity.

Owing to having potential difference at built-in charged bus-bar with between for the external connector that guarantees the switching device that safe reason is connected with earth potential, need adopt rigid measures, comprise and to consider to select suitable material and project organization thereof, so that can satisfy conventional safety requirements relevant with compressive resistance in the present technique field.Because the compressive resistance of switching device is determined by the spacing between insulation device and the different live part basically, switching device can only just be implemented in compact structure in low voltage range so far fruitfully.

In order to reduce dielectric requirements, European patent document EP 0 199 249 B1 suggestion: will draw cover as contact by the insulator conductor surrounded to dielectric; Partial-length with the described at least conductor of a kind of elastic insulating material piston ring type ground parcel; For forming internal surface configurations one conductive layer of cavity, this conductive layer directly is connected with the current potential of described conductor.

The same configuration of touch-safe device one conductive layer, but this conductive layer is placed in the outer surface of insulation piston ring, and be connected with earth potential.

Summary of the invention

The object of the present invention is to provide a kind of this paper of being used for to start the coupling element of the switching device of described type, these coupling elements are realized in compact structure by easy structure means, and can integrally be packed into thus whole in the switching device in the pressure scope.

The objective of the invention is to be used for by metal-back encapsulation, gas-insulated and to have contact drawing that the charge coupled device of switching device of cover realizes by a kind of, wherein this contact is drawn to be enclosed within and is had the contact binding post in the air chamber, these binding posts are connected by the outer switch current potential of the lead that removably connects with Connection Element and air chamber, and its characteristics are:

Have a deflector respectively 1.1 cover is drawn in described contact, this deflector have one in cover is drawn in contact relative self end face and the deflecting electrode that bends;

Have a control electrode that is connected with described switch current potential respectively 1.2 cover is drawn in described contact, the external boundary profile of this electrode is parallel to described bending deflecting electrode at regional area at least;

Be enclosed within the Connection Element zone configuration seal cover 1.3 described contact is drawn, the interior zone that makes described contact draw cover contacts with the switch current potential by first conductive layer, and described contact is drawn the perimeter of cover and contacted with earth potential by second conductive layer.

Control electrode draws in the cover in described contact and directly is connected with the switch current potential, and its external boundary profile is parallel to the bending end of described deflector at least at regional area; Adopt this class control electrode to realize the voltage load is assigned to perimeter and those mutual direct-connected seal covers that cover is drawn in described contact, make because the space between built-in switch current potential and external earth potential enlarges greatly, no longer the partial discharge process may take place.In fact these coupling elements all do not have partial discharge in the pressure scope in whole.

In addition, electric loading is evenly distributed on the contact of pressing mutually and having a seal cover and draws in so-called high accuracy seam (Edelfuge) zone between the cover end.

In addition, adopt and to be connected on the switch current potential and at first conductive layer with big surface of described seal cover inside, the especially less intense high accuracy seam region that presses is only born very low electric loading.

The present invention's one favourable improvement structure has following feature:

Cast with those and into to contact the contact binding post zone of drawing in the cover 2.1 cover is drawn in described contact, and described deflector and described control electrode all to be configured to rotation symmetrical.

Therefore, described deflector and control electrode are made easily as producing part in enormous quantities, and are loaded into contact without difficulty draw cover before casting.Because its rotational symmetry structure, cover is drawn in described contact can be loaded into switching device without difficulty.

Another favourable structure of the present invention has following feature:

3.1 described contact binding post and described Connection Element have the rotation cross-sectional outling of same type respectively;

3.2 described contact binding post and described Connection Element are flattened respectively in its detachable coupled zone.

Therefore described contact is drawn cover and is made into the close-coupled function element, is placed in time save space in the switching device.

Description of drawings

By the accompanying drawing illustrated embodiment the present invention is described in further detail below, in the accompanying drawing:

Fig. 1 represents the complete section face view of the charge coupled device of switching device according to a preferred embodiment of the invention, and for not describing respectively to dissect the hacures of object for the purpose of clear.

Embodiment

This coupling element is drawn cover KD and is made up of described Connection Element AE with contacting by described contact binding post KA basically.Described contact binding post KA in the gas-insulated housing of switching device draws cover KD by means of described contact to derive from not shown zone, so that can for example be connected with a same unshowned bus-bar section by described Connection Element AE.Described contact is drawn cover KD and is made into the casting resin parts, also has described deflector DB and control electrode SE into this resin component of being cast except described Metal Contact binding post KA.Be parallel to the sloping portion of deflector DB in cover KD is drawn in contact, control electrode SE is set, this control electrode is set up at its other end and is connected with the conduction of switch current potential.Can see that in addition cover KD is drawn in described contact and Connection Element AE is surrounded by described seal cover VA in their contacted zones.At this, adopt pressure ring DR in the direction of arrows described seal cover VA to be pressed against described contact and draw the end face that overlaps KD.Described seal cover VA is portion's area configurations first conductive layer LS1 within it, and it bears the switch current potential of described Connection Element AE, and correspondingly also bears the switch current potential of described contact binding post KA when interconnecting state.In addition, described seal cover VA disposes the second conductive layer LS2 in its perimeter, and it bears the earth potential of described Connection Element AE.

By this layout with by the acting in conjunction of described deflecting electrode DE and control electrode SE and in conjunction with two conductive layer LS1, LS2 having different potentials, control so-called radially high accuracy seam like this, make these coupling devices in fact can be applicable in the whole middle pressure scope, and do not produce partial discharge.

Claims

1. one kind is used for by metal-back encapsulation, gas-insulated and has the charge coupled device of switching device that cover is drawn in contact, this contact is drawn to be enclosed within and is had the contact binding post in the air chamber, these binding posts are connected by the outer switch current potential of the lead that removably connects with Connection Element and air chamber

It is characterized in that:

Described contact is drawn cover (KD) and is had a deflector (DB) respectively, this deflector have one in cover (KD) is drawn in contact the relative deflecting electrode (DE) of self end face bending;

Described contact is drawn cover (KD) and is had a control electrode (SE) that is connected with described switch current potential respectively, and the external boundary profile of this electrode is parallel to the deflecting electrode (DE) of described bending at least at regional area;

Cover (KD) configuration seal cover (VA) in Connection Element (AE) zone is drawn in described contact, the interior zone that makes described contact draw cover (KD) contacts with the switch current potential through first conductive layer (LS1), and described contact is drawn the perimeter of cover (KD) and contacted with earth potential through second conductive layer (LS2).

2. the charge coupled device that is used for by metal-back encapsulation, gas isolated switching device as claimed in claim 1,

It is characterized in that:

Described contact is drawn cover (KD) and is cast to those and contacts contact binding post (KA) zone of drawing in the cover, and described deflector (DB) and described control electrode (SE) are rotational symmetry structure.

3. by claim 1 or the 2 described charge coupled devices that are used for by metal-back encapsulation, gas isolated switching device,

It is characterized in that:

Described contact binding post (KA) and described Connection Element (AE) have the rotation cross-sectional outling of same type respectively;

Described contact binding post (KA) and described Connection Element (AE) are flattened respectively in its detachable coupled zone.