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1. CA2307309 - CONTROL CIRCUIT FOR A MOTOR-OPERATED SWITCH

Office Canada
Application Number 2307309
Application Date 30.08.1999
Publication Number 2307309
Publication Date 09.03.2000
Publication Kind A1
IPC
H02H 7/22
HELECTRICITY
02GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
7Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
22for distribution gear, e.g. bus-bar systems; for switching devices
H01H 3/26
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
3Mechanisms for operating contacts
22Power arrangements internal to the switch for operating the driving mechanism
26using dynamo-electric motor
H01H 33/36
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
33High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
02Details
28Power arrangements internal to the switch for operating the driving mechanism
36using dynamo-electric motor
CPC
H01H 3/26
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
3Mechanisms for operating contacts
22Power arrangements internal to the switch for operating the driving mechanism
26using dynamo-electric motor
H01H 2003/266
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
3Mechanisms for operating contacts
22Power arrangements internal to the switch for operating the driving mechanism
26using dynamo-electric motor
266having control circuits for motor operating switches, e.g. controlling the opening or closing speed of the contacts
Applicants SQUARE D COMPANY
Inventors MARANO, JAMES R.
MALO, KEVIN J.
MEEHLEDER, STEVEN M.
Priority Data 09143916 31.08.1998 US
Title
(EN) CONTROL CIRCUIT FOR A MOTOR-OPERATED SWITCH
(FR) CIRCUIT DE COMMANDE DE MOTEUR A MARCHE PAR COMMUTATION
Abstract
(EN)
A motor control circuit controls operation of a motor for making or breaking one or more pairs of contacts of a power switching device such as a circuit breaker. The motor control circuit includes a logic circuit responsive to a control input signal and an enable signal for producing an active signal state when both the control signal and the enable signal are present, and for producing an inactive logic signal state when either of the control signal and the enable signal is not present. A switching control signal producing circuit is responsive to said active state of the logic signal for producing a switching control signal for operating the motor for a predetermined time interval sufficient to perform one of opening and closing of the one or more pairs of contacts.