DE29512870U1 - NH fuse switch disconnector - Google Patents

Description

Albrecht Jung GmbH & Co. KG He 7&Iacgr; ? genberger Str. 11

88356 East Räch

09.08.1995

NJi-fuse load break switch

The innovation concerns an NH fuse switch disconnector _such as is used in low-voltage distribution boards. Such NH fuse switch disconnectors are switch disconnectors in which the NH fuse inserts form the moving contacts. They are operated or switched exclusively by directly applied human force.

They usually consist of a plastic base that supports the fixed contacts with their incoming and outgoing rails, two side parts and the switch cover that is arranged so that it can move and in which the NH-SJ fuse inserts are suspended.

Because the individual poles of the multi-pole NH fuse switch disconnector are arranged vertically one above the other _, it has the shape of an elongated cuboid.

The outgoing busbars run parallel to the long sides to one of the two narrow front sides, where they are concealed as connections for the outgoing cables. The incoming busbars are led through the plastic base to the rear, where they make contact with transverse busbars . The busbar systems are available with different busbar centre distances (e.g. 185 mm, 100 mm, 60 mm).

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The well-known NH fuse load isolators are available in the following designs:

a) A complete device that is only suitable for one type of busbar. The disadvantage is that the customer can only use it in one system and he has to keep different types in stock and install them in his systems.

The disadvantage for the manufacturer is that complex plastic injection molding tools must be provided for each rail center distance.

b) On the other hand, a basic device that can be adapted to other rail distances using an adapter. This is described in the applicant's application S 9416 753.2. There, a reduction in the rail distance from 100 mm to 60 mm was to be achieved. An increase in distance cannot be achieved with the means described there, as this would require complex rail guides in the connection area and would make the device considerably more expensive.

c) Furthermore, NH fuse loads are available on the market.

Disconnectors are widely used which _can be installed on busbars (in NH fuse switch disconnectors the fuse links are arranged next to each other). However, the busbar centre distances are limited to a maximum of 60 mm. This cannot be done any other way due to the design.

There are various applications for this, such as z,8, G 9210 090,2, H Ol H 85/20,

In summary, it can be stated that in order to realize different busbar center distances, on the one hand, cost-intensive adapter sets are required, or on the other hand, complex plastic injection molding tools must be built.

The innovation is based on the task of building an NH fuse switch disconnector for a larger busbar center distance, preferably e.g. 185 mm, starting from a smaller busbar center distance, preferably e.g. 100 mm, with reduced tool costs.

This task is solved in an innovative way by using the standard NH fuse switchboard with a rail distance of e.g. 100 mm to the base for the 2.8, 185 mm strips. The housing with its switch cover and the associated switching mechanism is used from this strip. Only the lower part with the connecting rail and outgoing rail is developed for this purpose.

A "100-bar" according to Fig.1 (bar with 100 mm busbar/bar spacing ?a _s ?b) is specified. It consists of the bar base 1 and the connection contacts 2a _{, 2b} , 2c attached to it, which in turn are electrically connected to the connection bars Sa, 3b, Sc.

They are bent at right angles on the underside of the lower part 1 and provided with holes so that they can be screwed onto the busbars 25a, 25b, 25c z,8. These busbars have an exemplary center distance 7a, ?b of 100 mm.

Furthermore, the strip according to Fig. 1 and Fig. 2 consists of the outgoing contacts 4a? 4b, 4c, which are electrically connected to the outgoing rails 5a, 5b, 5c. The customer-side connections 6a, 6b, 6c on the outgoing rails are arranged in a stepped manner, for example.

As shown in Fig. 11, the lower part 1 of Fig. 1 the 2nd i1 side part 8 is attached.

In which moves example parallel to the lower part the switch cover 9 with the fuse inserts 10a, 10b _f 10c, driven by the shift lever 11, The connection terminals 6a, 6b, 6c are covered with the cover 24, which is attached to the side parts 8, touch-proof covered,

The circuit shown in Fig. 1, consisting of Pages part 1 8, switch cover 9, fuse inserts 10 and Shift lever 11 is assembled and is shown in Fig. 5b referred to as cpl, switch i1 12.

This complete switching part 12 is used according to the invention and placed on the lower part 13 with its large busbar spacings 15a, 15b according to Fig. 4a,

In order to ensure that the fuse inserts 10a, 10b, 10c are contacted with the connecting contacts 2a, 2b, 2c and outgoing contacts 4a, 4b, 4c, it is proposed, in accordance with the innovation, to arrange the contacts in the same systematic position with respect to the same busbar center distance 7a, 7b to the fuse inserts 10a, 10b, 10c. This means that only the connecting bars and outgoing bars need to be changed as follows;

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As shown in Fig. 4b, the connecting rail 14a bent at right angles and rotated 180" and as far as extended _ß so that the desired satiimel rail/nitten/iiaß 15a (here from e.g. 185 tu tu) is created.

This means that a shaft-like Recess 17 Fig. 4c should be left free so that the Busbar connection 14e with a screwing device remains achievable.

Connecting bar Sb in Fig. 4b is left* it forms the same axis of symmetry of the busbar system and 15 and the same axis of symmetry of the subsections 1 and IS.

The contact 2b with the connecting rail 14c (in Fig. 4b) is only extended, starting from the connecting rail Sc., to the desired rail size 15b. As a result, a shaft-like recess 18 (in Fig. 4c) must also be left free in the lower part 13 so that the busbar connection 14d remains accessible with a screwing device.

In Fig. 4c, the outgoing rail 19a (starting from the outgoing rail 5a) is extended by the shaft length 18, as is the outgoing rail 19b (starting from the outgoing rail 5b). The outgoing rail 19c is laid around the shaft 18.

The three outgoing rails 19a., 19b., 19c are folded at points 20a., 20b and 20c (Fig. 4b) to produce the above rail path. They can also be riveted or made from a solid cutting tool.

As can be seen in Fig. 4a and 4c, the lower part 13, starting from the lower part 1, is extended upwards in the direction of the connecting rail 14a by the dimension 21a and downwards in the direction of the outgoing rail 19a, 19b, 19c by 21b, so that the connecting rail 14a and the outgoing rail 19a? 19b are embedded in a touch-safe manner.

It makes sense to extend the lower part 13 even further in the directions 21af 21b, so that the NH fuse switch disconnector 1first fits the existing strip systems of the An/ff e 1 of the in.

A contact protection cover 12 and 23 is attached to the switch part 11 (Fig. 4a) so that the extensions 21a, 21b of the lower part 13 are covered and protected against contact.

The advantages achieved with the innovation consist in particular in the fact that;

- only one sub-section i1 with its connecting rails has to be developed, thus drastically reducing development costs and development time,

- only a few plastic injection molds need to be built and this represents a significant cost reduction 11,

- the variety of parts at the manufacturer and at the customer can be reduced, since the same parts such as housing, switch cover and switch mechanism can be used.

Claims (1)

It) NH fuse switch disconnector with its switching part 12 consisting of side parts and the switch covers arranged thereon, characterized in that the switching part 12 can be placed on a base part 1 with its contacts 2 and 4 and with connecting rails 3 forming the busbar center distance and alternatively on a base part 13 with its contacts 2 and 4 and with connecting rails 14 forming the busbar center distance 15. 2,) The fuse switch disconnector according to claim l _f thereby geke &eegr;&eegr;&zgr; eich &eegr; et* that the connecting rail 14a is rotated by 180" starting from the busbar center distance 7 and extended to the busbar center distance 15a, 3.) The safety load breaker is according to claim 1~2 _f This ensures that the connecting rail 14c is extended from the busbar center distance 7 to the busbar center distance 15b, 4,) The fuse switch disconnector is according to claims 1-3? characterized in that a shaft 17 and 18 is provided for the fastening of the connecting rails 14a and 14c. 9 - 5.) The safety load isolator according to claim 1-4, characterized in that the connecting rail 3b forms the axis of symmetry of the satellite rail systems 7 and 15 and the axis of symmetry of both lower parts 1 and 13. 6,) The branch separating strip according to claims 1-5, This is achieved by extending the outgoing rails 19, starting from the outgoing rails 5*, so that they go around the shaft 18 and thus the connections 6 are reached. ?.) The safety load is according to claim 1-6, This is achieved by extending the lower part 113 by the dimensions 21a and 21b, in order to embed the rails 14a, 14c and 19a, 19b, 19c in a way that prevents them from being touched.