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公开(公告)号：US20210203150A1
公开(公告)日：2021-07-01
申请号：US16731023
申请日：2019-12-30
发明人： John J. SHEA , Julius M. LIPTAK
摘要： Methods and systems for suppressing arc formation in branch breakers provide a load center that can monitor a branch breaker for indications of arc formation. The load center may include a main breaker that can immediately cut current to the upon receiving an indication of an arc forming in the branch breaker. The indication may be provided by a sensor circuit that sends a trigger signal to the main breaker when arc formation is detected within the branch breaker. The main breaker checks that the trigger signal indicates arc formation, then cuts current to suppress the arc. The main breaker then waits a short period for the branch breaker to clear before restoring current. The wait period is sufficiently short such that devices receiving power from the load center are not adversely affected. To improve cutoff and restoration response times, the main breaker employs a solid-state trip switch.
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公开(公告)号：US20190190428A1
公开(公告)日：2019-06-20
申请号：US15848758
申请日：2017-12-20
发明人： Richard K. WEILER , Benjamin W. Edwards , Alan E. FREEMAN , Kevin M. JEFFERIES , Julius M. LIPTAK , Matthew L. WHITE
IPC分类号： H02P23/26 , G05F1/70 , G01R31/02 , G01R31/327
CPC分类号： H02P23/26 , G01R31/028 , G01R31/3274 , G05F1/70
摘要： A system and method is provided to monitor wear on a power factor correction capacitor in a motor system. The system and method obtains a baseline inductance angle, reactive power or power factor corresponding to a baseline power factor correction by the capacitor in the circuit; monitors a current supplied to the motor at a location upstream of the capacitor; monitors a voltage supplied to the motor, and determines a present inductance angle, reactive power or power factor based on the monitored current and voltage. The present inductance angle, reactive power or power factor corresponds to a present power factor correction by the capacitor. The system and method can then determine when the power factor correction of the capacitor has degraded to an unsatisfactory level based on a change in the inductance angle, reactive power or power factor from the baseline values, and take appropriate action
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