Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Tripping means
Reexamination Certificate
2000-08-02
2001-12-04
Donovan, Lincoln (Department: 2832)
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Tripping means
C335S020000
Reexamination Certificate
active
06326871
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a switchgear unit which has a switching device having a rotary operating mechanism and a breaker mechanism, as well as a coupled undervoltage release having a leading auxiliary switch having a contract bridge carrier which has moving contacts as well as fixed contacts that contact the moving contacts.
BACKGROUND OF THE INVENTION
Generic switchgear units have been available from switchgear manufacturers for a long time. However, conventional switchgear have a complicated and expensive mechanical design.
SUMMARY
Therefore, the object of the present invention is to create a switchgear unit of the type defined above, permitting implementation of an undervoltage release having a leading auxiliary switch in a simple manner.
German Patent 38 20 113 describes a switchgear unit having a switching device having a rotary operating mechanism and a breaker mechanism. The switching device is a power circuit-breaker, and having a coupled auxiliary switch or a signal switch which has a contact bridge carrier having moving contacts and fixed contacts that can be contacted with the moving contacts. The additional switch that can be coupled is not a undervoltage release having a leading auxiliary switch. This power circuit-breaker has a latch which is accessible through an opening in the side wall and also trips a latch of the additional switch in the event of a short circuit of the switching device. It is possible here to set the function as an auxiliary switch or as a signal switch or as a relative auxiliary switch not only before mounting on the respective power circuit-breaker or before assembly with other such auxiliary switches and signal switches, but also this can be done subsequently in the assembled state on the hard-wired device without any additional assembly work. This is achieved by arranging a trip-free circuit-breaker between an operating knob and a blocking device of the auxiliary switch so that it can be lifted as needed by a coupling element. The coupling element is designed as a pluggable connecting shoe having on its upper end fact the marking “Hi” to characterize its function as an auxiliary switch when the connecting shoe is attached. In this function, the original function of the additional switch as a relative auxiliary switch or as a signal switch bearing the marking “RHi” on the end face of the operating knob is covered by the connecting shoe, so that the respective function of the additional switch can easily be determined on the basis of the markings on the connecting shoe and on the operating knob.
This object is achieved by the fact that the switching device has a gate guide which is in operative connection with a projection on the contact bridge carrier of the auxiliary switch and acts on the contact bridge carrier in a first actuating phase of the actuating element in such a way that the ON position is reached between the moving contacts and the fixed contacts, and during the subsequent second actuating phase for actuating of the breaker mechanism, the ON position of the contacts of the auxiliary sqitch is maintained.
The switchgear unit according to the present invention is characterized in that the bridge carrier can be operated directly via its projection without additional intermediary elements. This projection can easily be designed as an integrally molded part which is easily brought into its ON position by a rotating contact bridge carrier.
the rotary operating mechanism is advantageously designed to have a finger-grip knob as an actuating element.
It is also advantageous if the finger-grip knob has a wheel designed with a contour as a gate guide for a wing handle acting on the projection. This contour in the form of a gate guide permits easy implementation of the first and second actuating gate.
An especially simple design is obtained when, in the first actuating phase, the wing handle pivots the contact bridge carrier via its projection into the ON position. In this way there is a direct transfer of the rotational drive to the contact bridge carrier without other intermediary elements.
In order to save space, e.g., in the case of installation in a switchgear cabinet, it is advabtageous if the switching device and the auxiliary switch are connected by side walls.
REFERENCES:
patent: 4801907 (1989-01-01), Kelaita, Jr. et al.
patent: 4806893 (1989-02-01), Castonguay et al.
patent: 4901046 (1990-02-01), Alsch
patent: 5657002 (1997-08-01), Ogden
patent: 5886641 (1999-03-01), Ulerich et al.
patent: 38 20 113 (1989-11-01), None
patent: 43 10 863 (1994-05-01), None
patent: 197 03 973 (1998-05-01), None
patent: 2 684 231 (1993-05-01), None
Birch & Stewart Kolasch & Birch, LLP
Donovan Lincoln
Siemens Aktiengesellschaft
LandOfFree
Switchgear unit of a switching device and a coupled leading... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Switchgear unit of a switching device and a coupled leading..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Switchgear unit of a switching device and a coupled leading... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2569307