Class / Patent application number | Description | Number of patent applications / Date published |
361043000 | Fault suppression (e.g., Petersen coil) | 8 |
20090161272 | ARC DETECTION SYSTEM AND METHOD - A system for identifying an arcing event in electrical distribution systems is provided. The system comprises a sensor configured to detect ultraviolet light and to generate a signal indicative of the arcing event propagating from the electrical distribution system. A processor coupled to the sensor and configured to analyze an ultraviolet light characteristic from the signal and generate an arc fault signal. A protective device configured to receive the arc fault signal and to mitigate the arcing event in the electrical distribution system. | 06-25-2009 |
20090284878 | SYSTEM AND METHOD FOR QUICKLY DISCHARGING AN AC RELAY - A system and method for quickly discharging an AC relay is provided. In one embodiment, the invention relates to a circuit for discharging a relay coil a relay, the circuit including relay circuitry having a relay coil disposed across a rectifier circuit, wherein the relay coil is configured to actuate at least one load switch when sufficiently energized, relay release circuitry including suppression circuitry coupled across the relay coil, and isolation circuitry in series between the relay coil and the rectifier circuit, and control circuitry configured to provide a voltage to the rectifier circuit to energize the relay coil, wherein the isolation circuitry is configured to isolate the relay coil and suppression circuitry based on a signal from the control circuitry. | 11-19-2009 |
20090284879 | SYSTEM AND METHOD FOR QUICKLY DISCHARGING A DC RELAY - A system and method for quickly discharging a DC relay is provided. In one embodiment, the invention relates to circuit for discharging a relay coil, the circuit including a first suppression circuit coupled across a power source, a switch, a relay coil in series with the switch, wherein the relay coil and the switch are coupled across the power source, and a second suppression circuit coupled across the relay coil, wherein the relay coil is configured to actuate at least one load switch when sufficiently energized by the power source, wherein the first suppression circuit is configured to discharge energy stored in the relay coil, and wherein the second suppression circuit is configured to discharge energy stored in the relay coil. | 11-19-2009 |
20100296207 | SHORT-CIRCUIT LIMITING APPARATUS IN A LOW-VOLTAGE INSTALLATION - A device for limiting a short-circuit current in an alternating-current low-voltage installation includes one or more supply lines having power-supply points with power-supply aggregates protected by feeder switches. The supply lines are separated at an isolating point into two line sections in response to a short circuit fault. One or more polyphase high-speed short-circuiting devices are coupled to the isolating point, having a current carrying capacity sufficient for short-circuit current intensities occurring on the supply line. The high-speed short-circuiting device performs a short-circuit switching operation at the isolating point in response to a trip signal. Two power circuit breakers are each connected in series between each of the line sections and the high-speed short circuiting device. A current-sensing device is coupled to each line section. The current-sensing device detects the short circuit fault, and transmits the trip signal to the high-speed short circuiting device. | 11-25-2010 |
20100296208 | Technique for Limiting Transmission of Fault Current - A new type of superconducting fault current limiter is disclosed, which can advantageously be used with high voltage transmission networks. The circuit is electrically connected to two terminals, which connect to the transmission network. The superconducting circuit is located within an enclosure or tank, which is electrically isolated from ground. Therefore, the voltage difference between the enclosure and the superconducting circuit, and between the enclosure and the terminals are significantly less than exist in current deployments. In some embodiments, the enclosure is electrically connected to one of the terminals, while in other embodiments, the enclosure is electrically isolated from the terminals. The circuit can be combined with other like circuits to address a wide range of current transmission network configurations. | 11-25-2010 |
20130083435 | Method And Apparatus For Moving Material - An apparatus and method for providing ground fault protection to a lifting device utilizing an electromagnet and powered by a generator. The apparatus and method rectifies an AC voltage emanating from the generator source and monitors unsafe operating conditions of the generator's circuit wherein operation of the lifting device is ceased when predetermined electrical operating parameters are exceeded. | 04-04-2013 |
20130176650 | DEVICE AND METHOD FOR LIMITING LEAKAGE CURRENTS - A device including a mechanism detecting a position of a neutral of a power supply source for an electrical energy apparatus, such as a battery charger of an electric or hybrid motor vehicle, and a mechanism connecting a capacitor for limiting leakage currents between the neutral and an electrically conducting structure in which the apparatus is placed. The device can be used to limit leakage current during recharging of an electric or hybrid traction motor vehicle. | 07-11-2013 |
20140313623 | GROUND AUGMENTATION FOR MACHINES WITH FLOATING GROUNDS - An electrical equalization system for use with an electric drive train, and at least one critical component within an electric machine, is disclosed. The electric drive train includes a generator with a generator neutral and a motor with a motor neutral. Additionally, the electric machine includes a ground that is subject to an external charge. The electrical equalization system includes a first capacitor positioned between the generator neutral and the ground, and a second capacitor positioned between the motor neutral and the ground. Both the first and second capacitors are structured and arranged to cause a voltage equalization between at least one of the motor and/or the generator and the at least one critical component in response to an external charge event directed to the system. | 10-23-2014 |