DE1737477U - MOTOR CIRCUIT BREAKER WITH EXTENDABLE OVERCURRENT RELEASE BLOCK. - Google Patents

Description

Factory of electrical apparatus »·>« ■ * '* - "· ^Jü ' ^L - ^{ÜJ> l} p 9335/210 Gm

Dipl-Ing W Ke $ i ^{) reclier & Scllul1 A} · ⁵ · »Aarau / Switzerland 10 October 1956ß

Esslllengen em Msckar

WBl.rr »eckaretr.2, Part.382 8a

Motor protection switch with pull-out overcurrent trip block.

It is known that the overcurrent release element in motor protection switches can be replaced or pulled out Train block that can be plugged into the actual Sehalter or its housing.

To now the number of current transfer points within Reduce the Sohaltergehäuses between the switching elements and the trip block to a minimum and daduroh Keeping the space required for the entire switch as small as possible is, according to the present invention, every pole of the overcurrent release block with a fixed switching contact and a contact spring. The fixed switching contact is designed as a mating contact to the switching bridge, which is housed in the switch housing in the usual way. The contact spring is designed so that it is plugged in position of the trip block is not only the electrical connection to the associated connection contact, but also at the same time also serves as a holding device for the release block. The fixed switching contact that works together with the switching bridge is therefore attached directly to the overcurrent release look, and the contact spring exercises the two at the same time punctures mentioned above.

In the drawing, an embodiment of the subject matter of the invention is shown schematically. Here demonstrate

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Fig. 1 is a front view of a three-pole motor protection switch,

FIG. 2 shows a cross section through a pole of the switch, FIG. 3 shows a side view of the switch when it has been pulled out Overcurrent trip block »

The actual switch part of the motor protection switch is denoted by 1 and consists essentially of one Insulated housing in which the three switch poles arranged next to one another with their connection terminals and the one not Switching mechanism shown in its details is housed. For the sake of clarity are a Switch enclosing protective housing and the push buttons are not shown. The pull-out overcurrent release look is denoted by 2 and contains the three heat triggers incl .. their setting device as well a release lever. These are also built into an insulating housing on which the necessary contacts sit.

The shaft 3, which carries the lever 4, is via the organs of the mechanism not shown in the drawing actuated. This acts on the spring-loaded safety bridge 5 »through which the shutdown is carried out. The switching bridge when switched on, attaches itself to the fixed switching contact 6, which is fastened in the switch part 1, and on the other hand to the fixed switching contact 7, which is located directly on the overcurrent trip block 2. This arrangement h & t the advantage that with the lowest possible number of

Current crossing points is to get along. The overcurrent trip block 2 contains the bimetallic strip 8 for each pole, which presses on the release lever 9 and thereby triggers the Motor output switch caused in the event of an overcurrent.

The trip block 2 also carries a contact spring 10 for each pole, the bent end of which is attached to the fixed Terminal contact 11 applies when the block 2 is in the switch is oktokt. In this position, the contact spring 10 serves not only as an electrical contact, but at the same time also as a holding device, since it secures the block 2 in its inserted position. A special attachment of the Blookes 2 in the switch part 1 is therefore not necessary.

! Furthermore, a particularly favorable utilization of the space available within the switch part 1 is thereby achieved achieved that the pull-out direction of the overcurrent trip block runs in an oblique direction. The inclination is at least 10 ° relative to the perpendicular to the switch mounting plane. In this way, the connection contacts 11 required for each pole are namely with their connection screws 12 to be accommodated within the switch part 1. In a corresponding analog version are on the upper part of the Switch part 1, the fixed Ansohlußkontakte 6 with their Terminals 13 attached. This arrangement not only enables the overflow outlet to be easily exchanged blockes, but also a clear monitoring of the contacts is achieved »Also their individual parts can be without Difficulties can be exchanged at any time.

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Another advantage is that the terminals 12 and 13 are not next to each other, e.g. on the Foot of the Sohalterteiles 1, but parallel in a plane are arranged one above the other for switch fastening, making the connection of the supply lines essential is facilitated.

Claims (2)

Protection claims 1) Motor protection switch with pull-out overcurrent release block characterized in that each pole of the overcurrent release « blookes (2) a fixed switching contact (7) as a mating contact to the one arranged in the surrounding housing (1) and interacting with the one connection contact (6) Schaltbrüoke (5) as well as a contact spring (10) has, which is designed by appropriate shaping in particular its end in such a way that they interact with the other connector contact (11) accommodated in the housing (1) at the same time as a holding device for the overcurrent release block (2) in its inserted position serves * 2) Motor protection switch according to claim 1, characterized in that the Überstromauslb'sebloek (2) in oblique, at least 10 ° to the vertical of the switch mounting plane inclined direction can be inserted.