DE3521154A1 - EXPLOSION-PROTECTED MULTIPOLE NH FUSE - Google Patents

Description

the position of the indicator plunger or indicator plunger cannot be observed from the outside. Therefore a microswitch 35 is attached to a housing projection 34 in the interior of the lower housing part, the Actuating spring 36 is connected to a transverse bar or a transverse traverse 37. The connection between the actuating element 36 and the cross member 37 is such that a rotation of the cross member around any point in particular around the attachment point of the cross-member microswitch actuating spring is prevented, rather the cross member of the indicator tappets always in the direction of actuation of the Microswitch 35 is moved. Therefore, the cross member 37 has on the one facing the actuating spring 36 Side of opposite guide grooves 37a which encompass the side edges of the actuating spring 36 and thus serve to parallel the cross beam.

In the lower part of the housing, partitions 40 are provided, which divide a total of three rooms 41, 42 and 43, in which the individual securing elements 32 are located.

These partitions 40 can be formed on the lower housing part 10 or as separate parts in corresponding Depressions 46 (as shown) may be used.

Between the individual connecting lugs 20 and 21 with their screw terminals 22 and 23 are located also partitions 44 and 45, the air and creepage distances between two adjacent Enlarge connection points.

30th

35

45

50

55

60

65

Claims (1)

1 2 claims NH fuse element has addressed, can be led out to the outside in a simple manner. Here is the 1. Explosion-proof single or multi-pole NH crossbar so on the actuator of the micro fuse, the NH fuse elements attached in switch and so arranged inside the flameproof one of a lower housing part (10) and a 5 housing that the response only Upper housing part (11) composed, exploded, one of the two outer NH fuse elements, ie, ion-protected and flameproof encapsulated ge the movement of the release plunger of that element to the housing, characterized in that switching of the microswitch leads. Appropriately, the partition walls (40) on the lower part of the housing are designed and made plate-like, which correspond to the number of poles the serving spaces (41, 42, 43) divide, and that the leaf spring-like actuator of the connecting lugs, which is used for the NH fuse element microswitch. As a result, pivoting will result in elements that are guided in a pressure-proof manner out of the lower part of the housing and the cross member around the fastening point on the actuating part (10). 15 management organ when one of the two outer ones is addressed 2. NH fuse according to claim 1, characterized by preventing NH fuse elements, rather the cross characterizes that the partition walls (40) on the housing cross-member are then also displaced transversely to themselves. the se lower part (10) are formed. Attachment can be effected in that 3. NH fuse according to claim I ₁ characterized in that the recess by two opposite L-indicates that the partition walls (40) is formed as separate 20-shaped projections, which the leaf spring parts in recesses (46) on the lower housing part (10 ) term actuating member at the side. are used and held therein. On the basis of the drawing, in which an implementation example 4. NH fuse is shown according to one of the previous claims of the invention, the invention should marriage, characterized in that in the housing (10, as well as further advantageous embodiments and ver-11) a switching element is housed, which will be explained in more detail by improvements. the indicator plunger (33) of at least one NH-Si- It shows: cherungselementes (32) is actuated. Fig. 1 an insight into an NH fuse, when open 5. NH fuse according to claim 4, characterized by a cover, indicates that transversely to the NH fuse element Fig. 2 is a sectional view along the section line II-II elements (32) in the area of the display plunger (33) a 30 and with the actuator (36) of the switching element- Fig. 3 is a sectional view along the section line III- tes (35) connected, the indicator plunger overdek- III. kende transverse traverse (37) is provided, which should now be referred to FIG .
at least one indicator plunger in the direction of actuation. An explosion-proof housing consists of the actuating element of the switching element 35 nem housing lower part 10 and a housing upper part which is displaceable. 11, which by means of screw connections 12 (see Fig. 1) 6. NH fuse according to claim 4 or 5, thereby interconnected. The lower part of the housing 10 characterized in that the switching element has a micro-housing side wall 14, on whose free end switch (35) is. de a stop surface 15 of the housing cover 11 7. NH fuse according to claim 6, characterized in that 40 is set. On the upper part of the housing or on the cover 11 it is indicated that the actuating member (36) of a circular flange edge 16 is formed, which is surrounded by microswitch (35) in a known manner one of the housing wall 14, the touch leaf spring being shown in Recesses (& 7a) on the ring surface between the two prescribed crossbeams (37) are guided in a torsion-proof manner and the air gap 17 is formed. is fixed in it. 45 On the lower housing part 10 are busbars 18 and 19 provided, which through the side wall on the housing Description part 10 are brought out pressure-resistant and in the outside area end in terminal lugs 20 and 21 where The invention relates to a single or multi-pole ex- by means of screws 22 and 23 connecting lines attached plosion-protected NH fuse can be made in accordance with the upper 50, handle of claim 1. At the inner end of the busbars 18 and 19 are Such fuses are normally made of L-shaped connection contacts 24 and 25 by means of screws. ßen not accessible, so that it can not be recognized, ben 26 and 27 attached, in a manner known per se whether the individual fuse or the individual fuse at their perpendicular to the busbars 18 and 19 element has addressed. 55 extending legs 28 and 29 with the usual The object of the invention is to provide an explosive contact forms, as they are for the receiving protected NH fuse of the aforementioned type to me the contact knife of NH fuse elements create, in which the assembly is simplified and an application is generally customary. In this connection contacts 24 and show whether the NH fuse has responded, enable contact blades on legs 28 and 29 light is. 60 30 and 31 one NH fuse element 32 each This object is achieved according to the invention by sets so that from the terminal lug 20 via the connection the characterizing features of claim 1. circuit contact 24, the contact blades 30 and 31 a Further advantageous embodiments of the invention, current can flow to the terminal lug 21, can be found in the subclaims. Each NH fuse element 32 has known The fact that in the interior of the pressure-resistant housing 65 measured a display plunger 33, which when responding a microswitch is installed, which jumps out of the triggering of the fuse element 32, see dashed line or indicator plungers of the NH fuse elements over lined position 33 '. The problem here the cross member can be actuated, the signal can indicate whether there is any