Siemens Aktiengesellschaft

Erwin Flierl

Johann Drexler

Werner Harbauer

Gerhard Schroether

Richard Freitag

Johann Lehmeier

Siegfried Held

A contactor safety combination includes two contactors and a mechanical interlocking module coupled between them. It is possible to use conventional contactors of any size, i.e., even high-capacity loads are switchable with the contactor safety combination of the present invention. At the same time, this design approach dispenses with a third contactor conventionally used for the interlocking.

Contactor safety interlock mechanism

A latching block to be coupled to an electromagnetic switching device, which holds the switching device in the working position by locking the mechanism of the switching device which carries out the switching action. The latching block has a housing, a rack which can be coupled to the mechanism which carries out the switching action with a positive lock, and a lever which acts on a ratchet wheel. The engagement of the lever and the ratchet wheel can be released for unlocking.

Latching block for electromagnetic switching devices

The invention concerns an arrangement to couple an auxiliary switch mechanism to an electrical switchgear unit, preferrably a contactor, with a contact slide piece onto which the moving contact pieces are mounted, and a switchgear housing onto which the switchgear fixed-mounted contact pieces are mounted. The contact slide pieces of the switchgear unit and the auxiliary switch mechanism are mounted so that they can slide transversely to the direction of connection. A projection of the auxiliary switch mechanism is positioned in a cutout of the contactor in an interlocking fashion. The connection of contact slide pieces similarly takes place in a positive, interlocking fashion. A lock makes an effective connection with the position of the contact slide piece in the auxiliary switch mechanism, thereby preventing the removal of the auxiliary switch mechanism when the unit is switched on.

Arrangement for coupling an auxiliary switch mechanism

A contact arrangement for switchgear with multiple disconnects by contact points connected in parallel of two contact bridges aligned in a contact actuation link uses a spring collar for a contact pressure spring. The spring collar has cutouts transverse to the spring-action direction into which the contact bridges with the spring collars can be inserted and locked in place transverse to their longitudinal direction. The spring collar is rounded at two facing sliding surfaces in the contact actuation link aligned transverse to the longitudinal direction of the contact bridges. This assures optimal fitting of the contact bridges to the fixed contact components without jamming the spring collar in the alignment.

Contact arrangement for switchgear

An additional switchblock is laterally connected to a contactor of a magnetic control relay. The terminals of the switchblock and contactor are provided for on the front side opposite that of the support bar. A hook connection is used between the two lateral surfaces. When the hooks formed on the additional switchblock are inserted into corresponding recesses in the contactor, a formed-on ring portion of the additional switchblock actuating element engages with a switch position indicator extending from the front side of the contactor so that the actuating coupling is assured. The detent preventing the additional switchblock from sliding back away from the contactor is accomplished via detent arms formed on the additional switchblock arms and having wedge shaped projections which engage recesses in the contactor cover.

Contactor with additional switchblock

An electromagnet system for electromagnetic switchgear, the system having movable and stationary magnet portions, the stationary magnet portion having a pole surface wherein slots are provided for inserting a short-circuit ring. The slots are arranged so that the short-circuit ring may be substituted with a pole plate which extends beyond the pole surface on all sides. The pole plate has an opening which corresponds to the size of the pole surface. The opening is provided with two straps thereacross which can be inserted into the slots. This arrangement permits operation of the electromagnet system in response to AC, as well as DC, excitation.

Electromagnet system for electromagnetic switchgear

In an air break contactor, the armature comprises a first lamination and two second laminations, the first lamination having at a lower end an extension projecting at a 90.degree. angle with respect to the body of the lamination into a space between the bottom wall of the housing and the free end of a lower leg of the magnet assembly core member. The entire armature rests on an elbow of the lamination extension, while the second laminations are disposed between a pair of tabs extending from respective lateral edges of the first lamination.

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Rieden, Germany

Erwin Flierl