CZ278301B6 - Device for electric current disconnection, particularly on railway vehicles - Google Patents

Abstract

Device consists of skeleton (1) which is fast connected with a cover (2) and in space of terminal box (19) is in upper part fitted with lid (3). In it is lower part are placed insulating boards (7), between them is placed terminal box (6) with a sealing (4) of leads which in lower part creates a bearing. It is connected by pin (9) with interconnection knives (10). Interconnection knives (10) are connected by pin (11) with insulating draw-bar (12) and with driving elements (13). In space (20) of drive and upper contact is placed upper contact (15) and air drive (14), which is connected with insulating handle (17), on which is connected upper contact (16).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for disconnecting electrical current, in particular rail vehicles. This device is directly part of the equipment of the rail vehicle.

Hitherto known designs of electrical disconnectors which require the placement of a control device, including an air drive, are below the base plate of the apparatus, i.e. inside the electric rail vehicle. The insulating, contacting and current-carrying parts are then placed on top of the base plate outside the vehicle. This means that the insulating parts are subject to damage in the event of a collector current, damage by sudden changes in temperature and, in winter, damage by frost and snow. This may cause the unit to malfunction. These structures also require the use of an insulating bushing for the introduction of electric current into the rail vehicle.

These drawbacks are eliminated by the device for disconnecting the electric current, in particular of the rail vehicles according to the invention, which consists in that the carcass is firmly connected to the housing and is provided with a lid in the upper part of the terminal block. In its lower part there are insulating boards with a terminal block between them. The terminal block is connected to the inlet seal and forms a bearing in its lower part. The bearing is connected by a pin with connecting knives, which are connected by rods with insulating rod and driving element. The upper contact and the air drive are located in the drive and upper contact area. This is connected to an insulating bracket on which the bottom contact is fixed.

The device for disconnecting electric current according to the invention has the advantage that its design allows the actual disconnecting device to be placed inside the vehicle. This protects the disconnecting device from damage from the outside in the event of a breakdown of electrical devices located on the roof of the vehicle and against climatic influences. Furthermore, the disconnecting device ensures the passage of current through the roof part without further insulating bushing.

An example of a practical embodiment of the device according to the invention is shown in the accompanying drawings, in which FIG. 1 shows a partial sectional view of the device and FIG. 2 shows a plan view of the device with the lid exposed.

In Fig. 1 the frame 1 is firmly connected to the cover 2 and in the terminal compartment 19 is provided with a lid 3 in the upper part. In the lower part it is provided with insulating plates 7 between which is located the terminal 6 with bearings. This is connected by a pin 9 to the connecting knives 10, connected by the tie rods 11 to the insulating rod 12 and to the drive element 13. In the drive and upper contact space 20, the upper contact 15 and the air drive 14 are connected. to which it is attached, the lower contact 16 ,. The carcass 1 rigidly connected to the cover 2 is located outside, on the roof 18 of the vehicle.

In Fig. 2, the frame 1 is fixedly connected to the cover 2. The terminal 6 is placed between the insulating plates 7. The feed seals 4 are mounted on a pressure plate 5 which is fixed to the frame 1 firmly connected to the cover 2.

-1GB 278301 B6

By connecting the terminal block 6 with the connecting blades 10 to the lower contacts 16, electric current is supplied to the vehicle. By supplying compressed air to the opposite part of the air drive 14 with the drive element 13, the insulating rods 12 and by means of the rod pin 11, the connecting blades 10 are pulled out of the lower contacts 16 and inserted into the upper contacts 15, thereby grounding the upper part of the power cut-off device. The device can also be used without the upper contacts 15. The current transfer between the terminal block 6 and its extension portion with the projection blades 10 is carried out in a known manner, for example by flexible current-carrying connectors or current-carrying elements inside the bearing. Depending on the size of the supply current, the number of leads with seals 4 of the lead is also chosen.

The disclosed power cut-off device can be used, for example, as a power cut-off or as a ground-to-earth cut-off switch for severe climatic conditions, such as low and high outdoor temperatures.

Claims (1)

PATENT CLAIMS A device for disconnecting electric current, in particular rail vehicles, consisting of a frame, a cover, a pressure plate with lead-in seals, terminal blocks, bearings, insulating plates, interconnecting contacts, insulating rods, driving element and air drive, characterized in that the frame (1) rigidly connected to the cover (2) in the terminal compartment (19) is provided with a cover (3) in the upper part and insulating plates (7) in the lower part, between which the terminal block (6) with inlet seal (4) the parts form a bearing connected by a pin (9) to the connecting knives (10), connecting rods (11) of the tie rod with the insulating rod (12) and the driving element (13), (15) and, secondly, an air drive (14) coupled to an insulating bracket (17) on which the lower contact (16) is mounted.