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7400986 Usage monitoring apparatus  
An apparatus is disclosed for monitoring usage of multiple electrical devices. The apparatus comprises multiple non-invasive current sensors for sensing current in respective conductors associated...
7262519 Actuator unit with at least two actuators and a secure control unit  
In order to provide a bearing for an already prepositioned switching shaft, fitted with coupling levers, of a low-voltage circuit breaker in the region where the switching forces act, a bearing...
7154722 Loop control for distribution systems  
The invention contemplates a technique for providing loop control on a faulted overhead or underground loop system, while preventing restored current from being fed or back fed into the fault. In...
7050280 High speed transfer system  
A High Speed Transfer System which comprises three Protection and Control devices. A first and a second of said Protection and Control devices are used for failure detection on the feeder bus-bar;...
7042690 Power-line, differential, isolation loss detector  
In one embodiment, an integrated differential isolation loss detector is disclosed that generates a first temperature that is a function of a high side current and a second temperature that is a...
6985800 Protection of an electric power transmission network  
For the control of an electric power transmission network, where local protection functions are implemented by a plurality of local protection devices ( 3,3 a, 3 b, 3 b′ ,3 c ) located at a...
6937134 Reception of protection commands in a remote tripping device  
In order to receive protection commands in a remote tripping device, one or more signals is or are received, protection commands and combinations of protection commands are coded by means of an...
6896551 Power line phase coupler system  
A power line phase coupler system for repeating data signals between power line phases that can be easily installed by a user. The power line phase coupler system includes a housing, a female...
6778370 Adaptive recloser/sectionalizer  
A recloser is monitored and adaptively controlled so that it will operate in a manner responsive to prevailing conditions as either a recloser or as a sectionalizer. The prevailing conditions that...
6766143 Expanded capabilities for wireless two-way packet communications for intelligent electronic devices (IEDs)  
In an independent basic service set (IBSS) of IEDs, using wireless communications devices to provide license-free two-way wireless peer to peer communications of digital data between pairs of IEDs,...
6697240 Method and apparatus for automated reconfiguration of an electric power distribution system with enhanced protection  
Method and apparatus is disclosed for controlling an electric power distribution system including the use and coordination of information conveyed over communications to dynamically modify the...
6636401 Network protector with insulated laminated bus construction  
A bus assembly for a network protector, where the network protector includes a housing, and where the bus assembly includes a plurality of busses having laminations and a rack assembly. The...
6635974 Self-learning power management system and method  
A method and system for controlling power to a cranking subsystem in a device having a power source is disclosed. The method and system include providing at least one switch and providing at least...
6567256 Dual protective relay for power systems  
The relay obtains three-phase current signals from two power line sources thereof, typically two independent feeder lines. The two sets of signals are processed by a single processing means, which...
6496342 Distributed monitoring and protection system for a distributed power network  
A distributed monitoring and protection system for a distributed power network. The system includes a plurality of high-speed measuring units (MUs), wherein each MU is coupled to a power line to...
6490141 Power distribution system  
A power distribution system includes circuits each having an electronic circuit breaker as a protection for short-circuits and/or overloads, and a clocked power supply unit. The clocked power...
6469629 Distributed logic in multiple protective relays  
A protective relay, system, and relay operation method which allows logic functions to be distributed amongst multiple protective relays associated with a power distribution system. The protective...
6459998 Sensing downed power lines  
In systems embodying the invention, a “downed” power line is detected by sensing whether there is an open circuit along the power line and producing an indication that an open circuit condition...
6392856 Method and system for providing voltage support to a load connected to a utility power network  
A voltage recovery system and its method of operation provides voltage protection to a load connected to a distribution network of a utility power system or network by boosting the voltage on a...
6373670 Fault protection apparatus  
A fault protection apparatus is disclosed for use in a time graded fault protection scheme. The apparatus comprises a circuit breaker having a normally closed trip contact provided in a line,...
6369995 Protection relay device for distribution equipment  
A protection relay device for distribution equipment is provided with breakers respectively disposed at branches of a distribution system having the branches in a hierarchical structure, relays...
6347027 Method and apparatus for automated reconfiguration of an electric power distribution system with enhanced protection  
Method and apparatus for controlling an electric power distribution system including the use and coordination of information conveyed over communications to dynamically modify the protection...
6341054 Intelligent power distribution network  
A control system is used in an intelligent power distribution network. The power distribution network includes multiple branches, each of which is connected to a power source, electrical devices...
6292340 Apparatus for isolation of high impedance faults  
This invention relates to an arrangement for sensing a change in pressure from a first state to a second state. This is function in a grid system which has a fault undetected by flow measurement...
6275366 Apparatus and method for distributing electrical power  
The present invention relates to an apparatus and method for distributing electrical power from power substation circuits. The apparatus of the present invention is responsive to overcurrent...
6252753 Energy service stabilizer  
An electrical power distribution system having geographically separated plural generation stations and geographically separated loads is improved by dynamically offsetting a nominal real power...
6243244 Method for automated reconfiguration of a distribution system using distributed control logic and communications  
A system and method which detects and responds to abnormalities in a distribution system by reconfiguring nodes of the system to minimize the effects of the abnormality without the requirement of...
6212049 Load center monitor for electrical power lines  
A load center monitor (10) is disclosed for monitoring and analyzing data gathered by electronic circuit breakers (40) in a power distribution system and communicated to the load center monitor...
6195243 Method and apparatus for adaptive configuration and control in a network of electronic circuit breakers  
A system including a load center monitor (10) connected to a plurality of digitally enhanced circuit breakers (40) by a communication bus (26) forms a network of reconfigurable circuit breakers...
6157527 Load center monitor and digitally enhanced circuit breakers system for electrical power lines  
A method of communicating data with a plurality of electronic circuit breakers operatively connected in a power distribution system is disclosed and claimed herein. Each circuit breaker includes a...
6115248 Detachable securement of an accessory device to a handheld computer  
Embodiments of this invention provide for coupling an accessory device to a back face of a handheld computer while electrically connecting to the handheld computer through a communications or...
6111735 Method for automated reconfiguration of a distribution system using distributed control logic and communications  
A system and method which detects and responds to abnormalities in a distribution system by reconfiguring nodes of the system to minimize the effects of the abnormality without the requirement of...
6018449 Method for automated reconfiguration of a distribution system using distributed control logic and communications  
A system and method which detects and responds to abnormalities in a distribution system by reconfiguring nodes of the system to minimize the effects of the abnormality without the requirement of...
6005759 Method and system for monitoring and controlling an electrical distribution network  
A system for monitoring and controlling an electrical distribution network comprises an electrical distribution substation having a local area network (LAN), a feeder subsystem and a gateway. The...
6005758 Communication terminal for electrical power line distribution system  
A communication terminal (10) is coupled to and operable in a power line network with at least one of plurality of intelligent circuit breakers (40) wherein each such circuit breaker (40) has a...
6005757 Electrical switching device or trip unit acquiring predetermined settings from another electrical switching device or trip unit  
A first trip unit for interconnection with a second trip unit includes current transformers and potential transformers for sensing current, voltage and frequency conditions of a circuit breaker's...
5982595 Redundant communications in a protective relay  
A redundant communications scheme for a protective relay which allows high-speed, reliable, and fault tolerant communications between peer protective devices in a power distribution network....
5969925 Fire-initiation-protected power distribution system  
An arrangement for transmitting electric power from a source point to a load point comprises (i) a first sensor to monitor the amount of power being supplied from the source point, (ii) a second...
5960372 Method of monitoring electrical wear on selector switch disconnectors in a high voltage station  
The present invention relates to a method of monitoring electrical wear on selector switch disconnectors in a bay of a high voltage station that includes a set of distribution busbars connected to...
5943202 Two way packet radio including smart data buffer and packet rate conversion  
Intrinsically compressed device coded data is sent in radio packets with end use programs expanding the coded data for other purposes. Intelligent electronic devices are physically combined with...
5940260 Apparatus and method for distributing electrical power  
The present invention relates to an apparatus and method for distributing electrical power from power substation circuits. The apparatus of the present invention is responsive to overcurrent...
5838525 High speed single-pole trip logic for use in protective relaying  
A protective relaying system includes a local protective relay operatively coupled to a protected line segment at a first location, and a remote protective relay operatively coupled to the...
5786699 Test method and apparatus for testing a protective relay system  
A relay test apparatus for testing a protective relay operation of a protective relay system comprises GPS receivers, respectively connected to the protective relays, each GPS receiver analyzing...
5784237 Control method and apparatus for power distribution network  
A control method and apparatus is provided for isolating network faults via the communication between neighboring network locations and the control of sectionalizing switches at the network...
5777834 Safety switch arrangement  
A safety switch arrangement having a first supply line; a first computer unit coupled to the first supply line, the first computer unit having a first operating voltage; a first pair of...
5701226 Apparatus and method for distributing electrical power  
The present invention relates to an apparatus and method for distributing electrical power from power substation circuits. The apparatus of the present invention is responsive to overcurrent...
5666060 Test method and apparatus for testing a protective relay system  
A relay test apparatus for testing a protective relay operation of a protective relay system comprises GPS receivers, respectively connected to the protective relays, each GPS receiver analyzing...
5654859 Fault tolerant power distribution system  
A power distribution circuit is provided that isolates both power source and load faults. In one embodiment, the power distribution circuit includes two power MOSFETs connected with the channels of...
5642250 Protection release method  
In order to achieve improved release characteristics in the case of a protective device for power supply lines, a protection release method is proposed in which at least one signal (i, u) is...
5579195 Power stoppage minimizing systems for distribution lines and methods of using a distribution line  
A power stoppage minimizing system for a distribution line and a method of using a distribution line minimize a power stoppage section and a power stoppage time when a short circuit occurs in the...
Matches 1 - 50 out of 169 1 2 3 4 >