Electricity: electrical systems and devices – Control circuits for electromagnetic devices
Reexamination Certificate
1999-11-24
2001-12-04
Sherry, Michael J. (Department: 2836)
Electricity: electrical systems and devices
Control circuits for electromagnetic devices
C361S152000, C361S170000, C361S187000
Reexamination Certificate
active
06327130
ABSTRACT:
BACKGROUND OF THE INVENTION
The invention relates to a control device of a circuit breaker opening or closing electromagnet, the device comprising two power supply terminals and a remote control terminal.
Circuit breakers generally comprise a certain number of electrical auxiliaries, more particularly closing electromagnets (XF) or opening electromagnets, in particular shunt releases (MX).
Conventionally, these devices are operated by means of a pushbutton. As soon as the voltage applied to their power supply terminals is sufficient, they cause, depending on the case, opening or closing of the circuit breaker.
These devices can be remote controlled by means of a communication module, already present in the circuit breaker and connected to a remote control terminal of the auxiliary.
These two control modes have up to now been incompatible, the remote controlled auxiliary having to be permanently supplied.
SUMMARY OF THE INVENTION
The object of the invention is to achieve a control device of a circuit breaker opening or closing electromagnet not presenting these drawbacks.
According to the invention, this object is achieved by the fact that the device comprises a local control terminal and presence detection means connected to at least one presence detection terminal and designed to automatically detect connection of a communication module to the remote control and presence detection terminals of the device, so as to be able to operate either according to a first control mode, wherein the power supply terminals are connected to a voltage supply source by means of a first local control means, or according to a second control mode, wherein the two power supply terminals are connected directly to the voltage supply source, the local control terminal then being connected by means of a second local control means to one of the power supply terminals and the remote control and presence detection terminals being connected to the communication module. Simply connecting a communication module to the device enables the latter to automatically detect its presence and to modify its operating mode accordingly.
According to a development of the invention, the device comprises means for:
comparing a quantity representative of the voltage applied to the power supply terminals with a preset threshold,
detecting the presence of a communication module at the remote control and presence detection terminals, and
commanding excitation of at least one coil of the electromagnet when said quantity is greater than said threshold, either automatically in the absence of detection of presence of a communication module, or, when said presence is detected, if a control signal is, in addition, applied to the remote control terminal or to the local control terminal.
According to a first embodiment, the device comprises a remote control terminal and two presence detection terminals, the presence detection terminals being short-circuited by connection of the communication module.
According to a second embodiment, the device comprises a remote control and presence detection terminal connected by means of a resistor to an auxiliary voltage supply of the device, and a reference terminal, the reference terminal and remote control and presence detection terminal being connected by a resistor of the communication module when connection of said module to said terminals is performed.
REFERENCES:
patent: 4025823 (1977-05-01), Lang et al.
patent: 4446501 (1984-05-01), Peterson et al.
patent: 4597025 (1986-06-01), Rutchik et al.
patent: 5375032 (1994-12-01), Hatakeyama et al.
patent: 5627415 (1997-05-01), Charpentier et al.
patent: 5633776 (1997-05-01), Juncu et al.
patent: 5699222 (1997-12-01), Innes
patent: 5754386 (1998-05-01), Barbour et al.
patent: 5959826 (1999-09-01), Baurand et al.
patent: 5982596 (1999-11-01), Spencer et al.
patent: 2 536 904 (1984-06-01), None
patent: 0 297 957 A1 (1989-01-01), None
Chelloug Mustapha
Durif Ghislain
Nereau Jean-Pierre
Parkhurst & Wendel L.L.P.
Schneider Electric Industries S.A.
Sherry Michael J.
LandOfFree
Control device of a circuit breaker opening or closing... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Control device of a circuit breaker opening or closing..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control device of a circuit breaker opening or closing... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2599860