SU494890A3 - High Voltage Fuse Holder - Google Patents

Description

(54) HOLDER OF HIGH-VOLTAGE FUSES

one

A holder of high-voltage fuses, made of an insulating material, such as cast resin, is known, which includes tubular chambers with fuses.

The difference with the proposed device is that in order to simplify the design, the holder is made in the form of two detachable L-shaped parts with wires located inside them, one of which has tubular nozzles and the other through holes for tubular chambers, two of which have at least a busbar bridge is installed and which are covered by contact covers.

FIG. 1 shows the proposed high-voltage fuse holder in perspective with the fuse covers removed, side view; in fig. 2 - lit part with a partial cut, side view; in fig. 3 - pin bridge with a partial section, side view; in fig. 4 — contact cap in longitudinal section; in fig. 5 - bridge busbar with a partial cut, top view.

The high-voltage fuse holder consists mainly of an L-shaped molded part 1, three tubular chambers 2 fuses fixed on this part, arranged parallel to each other, also an L-shaped contact bridge 3 and the corresponding safety covers 4 for fuses not shown in the drawings inserted into the tubular chambers 2. The vertical bend 5 of the molded case has a recess 6 on its rear side for securing the fuse holders to

tire or frame shown in the drawing. Tubular nozzles 7 are formed on the front side of this elbow to locate the tubular chambers 2. The lower knee 8, located parallel to the tubular chambers 2,

It has wired contacts 9 that are connected to fuse contacts 10, which are shown in detail in FIG. 2, and the connections are made through conductors embedded in the molded part under consideration.

The L-shaped contact bridge 3 is angled and wider than the molded part 1. In the vertical knee 11 of the contact bridge there are three notches 12 for tubular chambers, as well as three contacts 13 located adjacent to these notches to which the contact pins 14 of the covers 4 can be led. Contacts 13 are connected via conductor 15 to wired contacts 16 poured into a contact bridge,

made of cast resin. The lower knee of the L-shaped contact bridge, the nominative contacts 16, also has a longitudinal groove in which the lower knee 8 of the molded part 1 is inserted. Both elbows are detachably connected to each other through any design, in this case screw connection 17 is shown.

Between the two vertical bends of the molded part I and the contact bridge 3 on two tubular chambers 2 there is a contact bridge 18 of the busbar, which has three contact pairs 19. If necessary, this bus can be removed from the tubular chambers 2 after loosening the screw connection 17.

The fuse covers 4, shown off, have a handle 20 at their front ends, by means of which the cover, together with the fuse inserted into it, is inserted into or pulled out of the tubular KaAiepy 2. As can be seen from FIG. 4, the handle 20 can be made as a separate part or together with the cover 4.

FIG. 2 shows the casting part 1 with tubular chambers 2 (partially cut) fixed unilaterally in it. Odip the end of the chamber 2 is inserted and glued in the tubular nozzle 7 of the molded part 1. At this end of the pipe there are directional rings 21 which base the fuses not shown in the drawing and whose contacts are held in the wire w, parts of it lead to contacts 10 fuse holder. Through the wires 22, each pin 10 of the fuse is connected to the corresponding supply 9, and the wires 22 are cast in the molded case 1.

The contact bridge 3 (Fig. 3) is made of cast resin, has filled conductors 15, which connect the contacts 16 to the safety contacts 13 located in the contact chambers. The contact chambers 23 are intended for the cores and the directions of the contact pins 14 which are not centrally located in the safety covers 4. The lower bend 24 of this cast contact bridge has a longitudinal groove 25 for the base of the lower bend 8 of the molded part 1.

FIG. 2 shows the construction of a known contact cover 4 with a handle 20. The handle 20 can be made, for example, in the form of a folding and / or recessed handle located in or on a molded niche 26. The cover itself consists mainly of a smooth outside tubular body made of an insulating material and having its casing 27 and base 28, in the molded ring insert of which threaded bushings 29 are inserted. Metal thread 30 is fastened in threaded bushings 29, which bears central metal counter contacts 31 for fuses. In addition, the metal bridge 32 is electrically conductively fixed to the carrier plate 30, in which the contact pin 14 is based. In this embodiment, the contact pin 14 is made in

tube 33, the free end of which, interacting with contact 13, has a slot, and to obtain an elastic fit has a spring ring 34. The inner side of the cover casing 27 has a certain amount

racks 35, designed to hold the contact covers 4 on the tubular chamber 2. To facilitate the attachment of the cover 4 to the free end of the pipe 2, racks 35 with bevels 36 are provided. On the free edge of the casing 27

cuts 37 for ventilation are provided.

The bridge 18 (Fig. 5) of the busbar consists mainly of an insulating body 38, which has two openings or recesses 39, the diameter of which corresponds to the outer shell of the tubular chamber 2. Three electrically conductive bridges 40 are connected to the insulating body 38, which connect pins 19 or 19 connect the not-shown busbar. Thanks to the busbar bridge 18, the switchgear can be expanded on both sides, going to both sides beyond the limits of the fuse bodies.

Subject invention

A high-voltage fuse holder made of an insulating material, such as cast resin, contains tubular chambers with preservatives, characterized in that, in order to simplify the design, the holder is made in the form of two detachable L-shaped parts with wires located inside them which has tubular nozzles, and the other has through holes for tubular chambers, two of which at least have an assembly bridge and which are closed with contact covers.

33 of FIG. four