KR100588769B1 - Metal-encapsulated, gas-insulated switchgear assemblies with gas-filled containers - Google Patents

Abstract

The invention relates to a gas insulated switchgear surrounded by metal, in particular a switchgear for intermediate voltages having a three-position switch and a power breaker such as a vacuum power breaker disposed together in a gas filled container. The container includes a duct for connecting a three-position switch to a bus bar arranged outside of the container and a duct for connecting a power breaker with a cable terminal of the switch gear arranged outside of the container. These switch gears each have a modular switch panel SF having a sealed first switching chamber for receiving a three-position switch DS and a bus bar SS and a sealed second switching chamber for receiving a power breaker R2. Is implemented by The first and second switching chambers R1 and R2 are connected to each other by a hermetic module connector device MK, each having a hermetic cable duct KD.

Description

Gas insulated switchgear with gas-filled container and enclosed in metal {METAL-ENCAPSULATED, GAS-INSULATED SWITCHGEAR ASSEMBLIES WITH GAS-FILLED CONTAINERS}

The present invention relates to a gas insulated switchgear, in particular a switchgear for intermediate voltages having a modular switch panel, enclosed in metal, wherein a three-position switch and a busbar are arranged together in a sealed first switching chamber, Within the sealed second switching chamber, power breakers are arranged one after the other, the bus bars are connected with the power breakers via a duct by a three-position switch, the power breakers including a corresponding number of cable ducts for connecting to the cable terminals. The switching chamber is defined by a pressure relief channel.

The switchgear of this type is described in A. Aufermann et al., ETZ, DC. 118, issued on August 16, 1997, pages 16-19, "Switch Gears for System Families".

The switchgear is provided with a single bus bar or double bus bar as required, and each single bus bar having a three-position switch is provided in a separate gas chamber. The gas chamber containers are connected adjacent to each other and must be structurally matched with each other to suit the conditions.

It is also known by DE 44 45 061 A1 to switch gears having a three-position switch and a power breaker (represented here as a vacuum switch) in the gas-sealed container, respectively.

The three-position switch placed in the container is completely connected by a bus bar arranged outside of the container, by a so-called duct, which penetrates the container in the upper region in an airtight manner. Similarly there is an additional duct in the lower area of the container for the cable terminals drawn from the outside, while the cable plug terminals can be led by the hermetic duct on the front. In this case each container usually has at least six welding ducts, on which the cable plug terminals can be installed directly, for example by means of an external cone system. An overvoltage discharger or a cable inspection device may also be connected to the cable plug terminal as necessary.

The containers of the device are also metal sealed without seals as they are hermetically welded. In the case of switch gears welded in this way, errors in the final inspection and subsequent operation phases may require very expensive maintenance work, or in serious cases one or more switch panels of the switch gear may be completely replaced. Because of that, the requirements for quality control during design and manufacturing are very strict.

The object of the present invention is to significantly improve the gas insulated switchgear, which is enclosed in metal as described above, in terms of structure formation, and in the event of an error without limiting the very desirable characteristics of the switchgear in terms of its lifetime and high operational reliability. It is to simplify the handling.

According to the present invention the above object,

1.1 3-position switches are arranged in turn in each of the first switching chambers controlled by a single connecting rod,

1.2 the pressure relief channel of the first switching chamber is provided on the outside, each pressure relief channel comprises a pressure reducing and fault-arc-resistant panel covering with an upwardly directed air outlet,

1.3 is achieved by the feature that the duct is embodied in a hermetic modular connector arrangement.

The switch panel configured as above allows the switch gear to be manufactured and managed as a whole less complex functional unit.

The switching chamber is provided with a duct in a particularly preferred manner, which duct is a gas insulated module connector device which actually enables the assembly and disassembly of the switch gear without the additional costs associated with insulating gas. It is suitable, for example, for replacing individual parts of the switchgear in the event of a failure, as for example a three-position switch or a power breaker, and unlike the known switchgear, only defective parts can be replaced. Inserting the integrated modular connector device between the different switching chambers as a hermetic connection member greatly improves the structure of the switch panel composed of modules. By means of a relatively simple control mechanism, the three-position switch is arranged adjacent to each other in the first switching chamber and in parallel to the front face of the switch panel in the plane of rotation of its contact, thus requiring a correspondingly small installation volume. Can be operated with connecting rod.

By the panel covering delimiting the upper side of the first switching chamber and the pressure relief channel of the switch panel, the safety requirement for human protection is met despite the compact structure of the switch gear.

Slightly deformed, metal-insulated switchgear surrounded by metal

2.1 3-position switches are arranged in turn in each of the first switching chambers controlled by a single connecting rod,

2.2 The pressure relief channel of the first switching chamber is provided on the outside, each pressure relief channel includes a pressure reducing and fault-arc-resistant panel covering with an upwardly directed air outlet,

2.3 The duct is implemented with a hermetic modular connector device,

2.4 said switch panel comprises a sealed third switching chamber for receiving a cable duct,

2.5 The breaker of the second switching chamber is connected to the cable duct of the third switching chamber via a modular connector device.

The switch gear is further distinguished from the switch gear mentioned in the introduction by a third switching chamber provided, in which the cable terminals separated from the power breaker are accommodated. Also here the switch chambers, in this case the second and third switching chambers, like the first switch gear type, are connected in a hermetic manner with the module connector device, whereby the above-mentioned advantages more strongly affect the switch gear. For measurement purposes a corresponding transducer device can be installed in the module connector device for easy access from outside of the switching chamber.

According to a preferred embodiment of the invention the cable duct comprises an inner cone terminal (in connection with the features of claim 3) and an outer cone terminal (in connection with the features of claim 4).

In a gas insulated switchgear, which is enclosed in metal, in which the switch panel is functionally connected to each other in a so-called longitudinal connector, the following features are provided according to a further very preferred embodiment of the present invention.

That is, the switch panel of the 5.1 switchgear is connected to the number of hermetic panel connector devices corresponding to the number of bus bars,

5.2 The panel connector device has the same structure as the module connector device.

The modular connector device of the same structure makes it possible to assemble the switch panel of the modular structure into the most different switch gear variant without incurring a cost in a simple way.

The invention is explained in more detail by the very simple embodiment shown in two figures.

1 shows a possible embodiment of a switchgear with two separate switching chambers at the right front side, and as a switchgear with longitudinal connectors, as shown in the side shown from the left,

2 shows a modified switch gear with three mutually independent switching chambers.

FIG. 1 shows a gas insulated switch gear, enclosed in metal, from the front and side, the apparatus comprising a switch panel SF and an additional switch panel SFn for the formation of a switch gear variant with longitudinal connectors. . In the upper region of the switch panel SF, there is provided a sealed first switching chamber R1 with an associated three-position switch DS controllable by the connecting rod SG and a corresponding bus bar SS, Also provided in the lower region of the switch panel SF is a sealed second switching chamber R2 having an associated power breaker LS, cable duct KD and connector bush SB. In addition, the sealed first switching chamber R1 is defined at the top by a defect-arc-resistant panel covering SA, wherein the defect-arc-resistant panel covering SA is a pressure load channel through the switch panel. DK) and, in the event of a failure, the heated gas is discharged from the switch panel in the direction of the arrow as intended. The use of a metal mesh inside the panel covering SA makes it clear in this regard that also a corresponding heat reduction is achieved which is very effective in protecting the human body in the event of a failure. Also shown are a number of modular connector devices, denoted by the symbol MK, which are arranged between the sealed switching chambers R1 and R2 in the assembled and disassembled state of the switch panel SF. The first and second switching chambers R1 and R2 are connected to each other so that gas exchange between them is not possible. In maintenance, it is ensured by the module connector device MK that the assembly no longer requires any additional costs due to the gas.

The module connector device MK is designed to accommodate, as indicated, a current transducer SW implemented as a ring core transducer as required.

As provided for the implementation of a switchgear with a longitudinal connector, on the left side of the front side of the switch panel SF, the same additional additional switch panel SFn appears in a side view. With the connection of two switching chambers R1 and R2 with a modular connector device indicated by the symbol MK, the switch panel SF is connected to the additional switch panel SFn via a panel connector device denoted by the symbol FK, where only one is shown here. The connection appears. The panel connector device FK has the same characteristics as the module connector device MK, and also has the same structure, in which the current converter SW is -as indicated-for the purpose of measuring in the same way. Can be.

FIG. 2 shows a gas insulated switchgear surrounded by an additional metal, in which the cable duct KD is arranged in a separate third switching chamber R3 in the switch panel SF for the switchgear shown in FIG. 1. do. As shown, the second switching chamber R2 is connected with the first switching chamber R1 and the third switching chamber R3 by the module connector device MK. Thus, if necessary, the cable duct KD can also be used without being inserted into the first and second switching chambers R1 and R2 filled with gas.

Claims (5)

A modular switch panel, wherein a three-position switch and a busbar in the switch panel are disposed in a commonly sealed first switching chamber, and a power breaker is disposed in turn in a sealed second chamber, the bus bar being Connected to a power breaker through a duct by a three-position switch, the power breaker comprising a corresponding number of cable ducts for connecting to the cable terminals, the metal-enclosed gas being configured such that the switching chamber is defined by a pressure relief channel. Insulated switchgear, 1.1 the three-position switch DS is arranged in turn in each of the first switching chambers R1 controlled by a single connecting rod SG, 1.2 the pressure relief channel of the first switching chamber R1 is provided on the outside, each pressure relief channel comprises a pressure reducing and fault-arc-resistant panel covering SA with an air outlet directed upwards, 1.3 Switch gear, characterized in that the duct is implemented with a hermetic modular connector device (MK). A modular structure switch panel, wherein the three-position switch and the bus bar in the switch panel are disposed in a commonly sealed first switching chamber and the power breaker is in turn arranged in a sealed second chamber, and the bus bar is connected to the three-position switch. Connected to a power breaker through a duct, the power breaker comprising a corresponding number of cable ducts for connecting to the cable terminals, the switching chamber being enclosed in a metal-insulated switchgear configured to be defined by a pressure relief channel. In 2.1 the three-position switch DS is arranged in turn in each of the first switching chambers R1 controlled by a single connecting rod SG, 2.2 The pressure relief channel of the first switching chamber R1 is provided on the outer side, each pressure relief channel includes a pressure reducing and fault-arc-resistant panel covering SA with an air outlet directed upwards, 2.3 the duct is embodied as a hermetic modular connector device (MK), 2.4 the switch panel comprises a sealed third switching chamber R3 for receiving the cable duct KD, 2.5 Switch gear, characterized in that the power breaker (LS) of the second switching chamber (2) is connected to the cable duct (KD) of the third switching chamber (R3) via a modular connector device (MK). The method according to claim 1 or 2, 3.1 Switch gear, characterized in that the cable duct KD comprises an inner cone terminal integrated therein. The method according to claim 1 or 2, 4.1 Switch gear, characterized in that the cable duct KD comprises an outer cone terminal integrated therein. The method according to claim 1 or 2, 5.1 The switch panel SF of the switchgear is connected to a hermetic panel connector device FK corresponding to the number of bus bars, 5.2 The switch gear characterized in that the panel connector device (FK) has the same structure as the module connector device (MK).

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