Patent application number | Description | Published |
20080204961 | Fuse Saving Power Distribution System and Fault Protection - Fault protection is provided with fuse saving in a power distribution system. An operating characteristic of a fault protection device protecting a portion of the power distribution system is configured in view of fuse melting characteristics. In this manner, fault protection is provided with fuse saving, when possible, with reduced service disruptions. | 08-28-2008 |
20080266733 | Circuit Testing Closer Apparatus and Method With In-Rush Current Awareness - A circuit testing closer is capable of closing a power distribution circuit and interrupting the resulting current at the next current zero. Upon detecting a fault, the circuit testing closer is operable to open contacts to isolate the fault. Next, the circuit testing closer tests the faulted line to determine whether the fault has cleared. The circuit testing closer may generate a first test signal having a first polarity and a second test signal having a second polarity opposite the first polarity. Generation of the second test signal may be limited to occur when the first test signal indicates a fault. | 10-30-2008 |
20090046400 | Fault Protection Device with Group Trip Delay and Method - A reclosing fault protection device detects a partial bypass state. Upon detecting the partial bypass state, the fault protection device implements a ground trip delay operating state. The ground trip delay operating state provides a delayed ground trip response characteristic. | 02-19-2009 |
20090273871 | Virtual Closed Loop Power Distribution System and Method - A virtual closed loop power distribution system couples a parallel source to a feeder upon an initial indication of a fault existing on a distribution feeder If the fault is persistent, a fault protection system including fault protection devices segmenting the distribution feeder operates to isolate the fault segment of the distribution feeder from each of the coupled sources. The coupled sources provide substantially uninterrupted service to the non-faulted segments of the distribution feeder until a circuit reconfiguration and return-to-normal function operates to restore the system upon repair of the fault. | 11-05-2009 |
20090290275 | Fault Protection System and Method for an Electrical Power Distribution System - A fault protection system for an electrical power distribution system and a method of configuring and operating a fault protection system for an electrical power distribution system accepts device fault protection parameters, such as the time-current-characteristics (TCCs), of boundary devices, and selects and sets fault protection parameters for one or more fault protection devices, such as fault-interrupters, that thus coordinate with the boundary devices. Fault protection parameter selection for each fault protection device may occur automatically, and each device may reconfigure its fault protection parameters based upon changes in the electrical power distribution system, for example, as the result of fault isolation and/or service restoration. | 11-26-2009 |
20100271743 | Fault Testing Fault Protection Device and Method - A fault protection device tests a distribution for persistence of a fault using a selectable first fault testing procedure and a second fault testing procedure. | 10-28-2010 |
20100296215 | Circuit Testing Closer Apparatus and Method with Dynamic Test Thresholds - A circuit testing closer is capable of closing a power distribution circuit and interrupting the resulting current at the next current zero. Upon detecting a fault, the circuit testing closer is operable to open contacts to isolate the fault. Next, the circuit testing closer tests the faulted line to determine whether the fault has cleared. The circuit testing closer may employ one or more dynamic thresholds to determine the existence of a fault. | 11-25-2010 |
20120120790 | Coordinated Fault Protection System - A power distribution protection system and method uses communications to coordinate operation of fault protection devices. Communications may be prioritized wherein messages of a lower priority are held or discarded in favor of messages of a higher priority, for example, messages indicating a fault condition. The devices may use multiple channel access schemes in accordance with a priority of a message to be communicated. | 05-17-2012 |
20120250202 | Multiple Phase Circuit Testing Closer Method - Upon detecting a fault, a circuit testing closer is operable to open contacts to isolate the fault. Next, the circuit testing closer tests the faulted phase to determine whether the fault has cleared. The circuit testing closer may employ one or more dynamic thresholds to determine the existence of a fault. | 10-04-2012 |