DE7500060U - Miniature circuit breakers in slimline and low-profile design - Google Patents

Description

December 1974

Utility model registration

Re: Miniature circuit breakers in slimline and low-profile design.

In the development of miniature circuit breakers in narrow design, efforts are made for reasons of installation technology also to keep the overall height as low as possible. This was achieved in known constructions in which one the space of the arc chamber and the amount of 4 arcing plates reduced. This measure inevitably reduces the switching capacity and selectivity. On the other hand, the switching capacity and the selective behavior of cable seat switches increasingly demanding requirements.

With some low-profile miniature circuit breakers, the arc chamber is located in the lower part of the switch with the arc stack, above the electromagnetic release, which acts as a drop anchor, and the switching mechanism with one pivotable contact arm. In the constructions of the type described are located between the electromagnetic Trigger and the switching lever joint parts or tension spring of the switching mechanism which in the overall height a certain space take in.

The request for protection consists in the use of this space to enlarge the arc chamber and extinguishing package with a for the low height of the switch more advantageous arrangement of parts of the switching mechanism.

As can be seen from the drawing, dis became in the sense of a Disconnection of the tension spring (2) acting on the contact arm (1) between the contact arm (1) and the narrow side of the switch arranged. The tension spring can be designed as a leg or compression spring, which also causes the contact pressure at the same time. The end of the shift lever (3) facing the inside of the holder is located directly above the yoke frame of the electromagnetic Trigger (4-).

The latching parts (5) and (6) mounted on the contact arm (1) are advantageously made of insulating material so that between

this and the live magnet yoke (7) none Insulating ribs are required

The part of the contact arm (1) located directly in front of the extinguishing packet (8) is designed as a straight contact piece (9) formed in the switched-on state with its end inclined 2u the lower quenching plates and immediately runs to the lower arc guide plate (io). With this arrangement, the arc will break in quickly guaranteed in the arc stack. The quenching plates can all or some of them close to the narrow side of the counter and held together from one or two packages

^ Protection claims

1 figure

7500060 05/22/75

Claims (4)

Protection claims 1. Miniature circuit breaker in Sehmalbauforia and low design with an arc chamber located in the lower part of the switch
Arcing plates, an electromagnetic release that acts as a strike anchor above the arcing plates and a contact arm mounted on the face in front of the arcing plates above the arc chamber, ^ §äiä £ 2 ^ _ £ ^ £ SS5 £ i £ ^ S £ 5 »^ - ^a ^ ^ - ^e ^ ^{m the} sense of a disconnection on the movable contact arm (1) acting tension spring (2) between the contact (1) and a narrow side of the switch is angeord = net. 2. Circuit breaker according to claim 1. dadurch_gekisiert that the part of the switching lever (3) connected to the switching mechanism is unnnbtelbar above the electromagnetic release
is located. 3. Circuit breaker according to claim 1. ^^ HSS ^ that the tension spring (2) acting on the contact arm at the same time Causes contact pressure. 4. Circuit breaker according to claim 1.-3 · ä ^ ä ^ 2 ^ _S £ ^ Eiiiii shows that the latching parts (4) and (5) mounted on the contact arm (1) are made of insulating material. 5 · Circuit breaker according to claim 1. that the contact-making part (9) of the contact arm (1) straight across the contact point and obliquely to the face of the Lö ^ schble = before (8) runs and ends just before the lower baffle. 7500060 05/22/75