SK4432001A3 - Electric appliance switch comprising a fuse seat - Google Patents

Abstract

A wall of a seat (10) surrounding a fuse (11) is provided with a first and second guiding slot (31, 30), adjacent to each other at a first end of the seat (10), and a third guiding slot (32) at a second end of the seat (10), all transversal to the seat axis. In the first guiding slot (31) an electrically conducting intermediate plate (22) and in the second guiding slot (30) a bow spring (21) and in the third guiding slot (32) a size controlling bow insert (23) are engagably inserted. In the state of closed contacts, the intermediate plate (22) electrically contacts the down conductor contact (14), which is, through an insulating partition (15), completely electrically insulated from the surroundings. The bow spring (21) is elastically spreadable on both ends. The improved fuse seat makes possible a simple replacement of fuses of various dimensions and prevents a dropping of the fuses out of a magazine, the down conductor contact, however, is completely protected against being touched.

Description

Technical field

BACKGROUND OF THE INVENTION The present invention relates to an electrical switchgear device comprising a fuse seat, particularly adapted to be placed on a busbar.

BACKGROUND OF THE INVENTION

From the patent SI 9700256 an electrical switching device is known which also has a seat for a protective device or a fuse provided in its housing. Said seat is provided only for the application of one fuse size, for another fuse size the seat must be changed. If the electrical switchgear is installed in a horizontal position, any handling of the fuse is difficult or impossible. Since the lower conductive contact is insufficiently protected against contact, the electrical switchgear is dangerous if the internal supply line and the bottom are mistakenly changed.

Thus, the technical problem to be solved by the present invention is to improve the fuse seat so that it is easily adaptable to fuses of different dimensions and to insulate the lower contact conductor in which the fuse dropping from the seat would not be possible and the lower conductive contact would be protected from touch.

SUMMARY OF THE INVENTION

The solution to the technical problem consists in an electrical switching device according to the invention which comprises a fuse seat and characterized in that in the surrounding wall of the fuse seat there are first and second guide grooves which abut one another in the first part of the saddle and abut the third guide groove in the second part of the , all said grooves are transverse to

····································

9 9 9 electrically conductive auxiliary plate which, in the closed contact state, electrically touches through its lower conductive contact cuff, which is generally protected by an insulating an annular spring is fixedly inserted into the second guide groove and a control arc insert is fixedly inserted into the third guide groove.

The electrical switching device according to the invention is further characterized in that the auxiliary plate has stops which extend towards the second part of the seat and in that the auxiliary plate stops additionally fix an arc spring, the two bent ends of which are elastically extensible.

In the electrical switchgear according to the invention, an improvement of the known fuse seat is achieved by simple means; therefore, it is possible to easily replace fuses of different dimensions, and if the electrical switchgear is installed in a horizontal position, no fuses will fall out of the chamber. During handling, the seat may remain in the electrical switchgear, but closing is only possible if the seat is correctly inserted. By means of an insulating partition, the bottom conductive contact is completely protected against contact.

The invention will now be described, by way of example, with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 shows an improved fuse seat of the present invention in an electrical switchgear; Fig. 2 shows an electrical switching device having a fuse seat, improved by the invention in the open contact position and with the fuse seat and the regulating arc plug being pulled out; and FIG. 3 shows a switchgear electrical device having a longitudinal section of the fuse seat as improved according to the invention in the closed contact position.

········································· · ·· ·· ·· · ·· ·

Examples of embodiments of the invention

The electrical switching device 1 comprises a seat 11 having a chamber 20 for a fuse 11. and is shown in the open and closed positions of Figures 2 and 3 individually, however, the actual seat 10 for the fuse 11 is shown in Figure 1.

The wall of the seat 10 surrounding the fuse 11 has first and second guide grooves 31, 30 that abut one another in the first part of the seat 10 and abut a third guide groove 32 in the second part of the seat 10. The grooves 31, 30, 32 are transverse to the seat axis JO. In the closed contact position, the first portion of the seat 10 is near the lower contact conductor 14 and the second portion of the seat 10 is near the middle contact 11.

According to the invention, the electrically conductive auxiliary plate 22 is fixedly engaged in the first guide groove 31 and the arc spring 21 is firmly fitted in the second guide groove 30. The control arc insert is firmly seated in the third guide groove 32.

In the closed contact position, the auxiliary plate 22 electrically contacts the lower conductive contact 14 via its collar 22, which is completely electrically isolated from the environment via the insulating partition 15. The insulating baffle 15 is made in one piece together with the remaining sheath of the electrical switch J. For this reason, additional contact protection is achieved by adapting the shape of the auxiliary pad 22 of the lower contact conductor 14. The auxiliary pad 22 also ensures efficient thermal contact of the fuse 11 with the lower contact conductor. . The auxiliary plate 22 allows precise placement of the seat 10 according to the invention in the electrical switching device J.

In the closed position of the electrical switching device 1, the fuse 11 is engaged. electrically contacts the middle contact 12 on one side and the lower conductive contact 14 on the other side. The auxiliary plate 22 is provided with a collar 22, preferably two collars 22 that extend toward the second portion of the seat 10. In the assembled seat 10 according to the invention, the collars 22 press the arc spring 21 against the wall of the seat 10. Thus, by means of the auxiliary plate 22, an arc spring 21 by means of which the fuse 11 is fixed in the intended position is additionally fixed, and this is protection against falling out of the guide groove 30.

The arc spring 21 has arcuate ends 21 which are elastically extensible and grip the intermediate fuse 11.

···························································

The size of the fuse 11 is limited by the control arc insert 23. It can be changed if the seat 10 for the fuse 11 is pulled out of the electrical switch device 8.

To this end, a special means is applied by means of which the control arc insert 23 is easily compressed and moved from the groove 32 into the chamber 20.

When the fuse 11 is replaced, the lever 17 is first turned, clear of the contact wiring 18 from the lower conductive contact JA. This releases the seat 11). By pressing on the seat 10, the auxiliary plate 22 is separated from the lower conductive contact 14 and the insulating partition 15. The seat rotates towards its guide pins. Thereby the spring 16 is compressed, which presses the middle contact 12. The loose seat 10 can be pulled out of the limiting member 11.

Now the fuse 11 is readily accessible and can be replaced by the extensible arc ends 21 'of the arc spring 21. The resilient arc ends 21' allow the electrical switching device 1 to be used in a horizontal position. There is nothing to prevent the handling of the saddle 10, which remains in the electrical switching device 1 all the time. The risk of accidental contact with electrical parts is reduced.

Then, the fuse 11 and / or the regulating arc insert can be replaced.

If the electrical switching device I is switched on again, the procedure is reversed. The auxiliary plate 22 and the insulating partition 11 prevent the lever Γ7 from rotating and the electrical contact being actuated until the seat 11 is in the proper position.

Claims (3)

PATENT CLAIMS · · · · · AT AT AT AT AT AT AT AT AT AT · AT • • • • • · · · ·· · The electrical switching device comprises a fuse seat (10), characterized in that the wall of the seat (10) surrounding the fuse (11) has first and second guide grooves (31, 30) which abut one another in the first part of the seat (10); abutting the third guide groove (32) in the second part of the seat (10), all the grooves (31, 30, 32) being transverse to the seat axis (10) and by electrically conducting an auxiliary conductive auxiliary in the first guide groove (31) a plate (22) which, in the closed contact position, by its sleeve (27 ”) electrically contacts the lower conductive contact (14), which is generally protected by an insulating partition (15) except the side of the sleeve (22”) of the auxiliary plate (22) in the second guide groove (30), an arcuate spring (21) is fixed and in the third guide groove (32) a control arc insert (23) is fixed. Second Second Third Third Electrical switching device according to claim 1, characterized in that the auxiliary plate (22) has ends (22 ") facing the second part of the seat (10). Electrical switching device according to claim 2, characterized in that the ends (22) of the auxiliary plate (22) additionally fasten the arc spring (21), the two ends (21) of which are elastically extensible.