| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 361059000 | Circuit automatically reconnected only after the fault is cleared | 22 |
| 20080247107 | APPARATUS AND METHOD FOR MONITORING, DETECTING AND RECOVERING FROM AN OVERCURRENT CONDITION - A weighing apparatus having a circuit for monitoring, detecting and recovering from an overcurrent condition is described. The circuit may include a switch, current sensor, latch circuitry and microprocessor. The microprocessor may allow the circuit to recover from the overcurrent condition. | 10-09-2008 |
| 20080297962 | BUS INTERFACE AND METHOD FOR SHORT-CIRCUIT DETECTION - Embodiments of bus interface circuitry and methods for short circuit detection are generally described herein. Other embodiments may be described and claimed. In some embodiments, the bus interface circuitry comprises logic circuitry to compare a driver stage output signal at a bond pad to internal reference voltages to generate control signals indicative of whether a short-circuit condition exists on a bus. The driver stage of the bus interface may be temporarily disabled when a short-circuit condition is indicated by the control signals. | 12-04-2008 |
| 20090185319 | METHOD OF BREAKING AN OVERCURRENT - A method of breaking an overcurrent is provided to connect an overcurrent breaking controller in series between an AC power and a load. Thus, when detecting the connected load of which the current generated with the consumed power is higher than a rated current of the overcurrent breaking controller, the overcurrent breaking controller instantly stops the load working, when detecting the current passing through the load that is lower than the rated current, the controller allowing the load to re-work. Thus, the load of which the rated current exceeds is prevented from being replaced, and automatic power shut and recovery are implemented for protection, power saving, easy installation, and energy waste prevention. | 07-23-2009 |
| 20090213510 | METHOD AND APPARATUS FOR DETECTING AND RECOVERING FROM EXTERNAL ELECTRICAL DISTURBANCES - Apparatus and method are described, illustratively in an LVLS master/slave system, for detecting a circuit failure, shutting down the system as if a normal power down function has occurred, but restarting the system. Signals, including power and ground lines are monitors, mal-functions detected and the apparatus put into a power down sequence. Illustratively in the LVLS system, driving a signal line to either the power or ground rails is used as a signal to the apparatus to enter the power down sequence. The present invention, after a programmable time, then drives the signal line to the opposite rail thereby signaling the system to restart—a wake up mode. After a programmable time, the signal line is released and the system resumes normal operation. | 08-27-2009 |
| 20090257159 | SHORT CIRCUIT PROTECTION CIRCUIT - A short circuit protection circuit which readily recovers a relay drive circuit to an output operation state after a short circuit is cancelled while preventing the relay drive circuit from being damaged by a short circuit. The relay drive circuit outputs a drive current to a load in accordance with a first control signal. A short circuit detection circuit detects the occurrence of a short circuit at an output side of the relay drive circuit and suspends output operation of the relay drive circuit when a short circuit occurs. Further, the short circuit detection circuit intermittently transmits a recovery signal to the relay drive circuit in a certain time interval after a predetermined time elapses from when the short circuit occurs to recover the output operation of the relay drive circuit. The time interval is gradually increased whenever the recovery signal is transmitted. | 10-15-2009 |
| 20100002347 | STREET FURNITURE SAFETY DEVICE - The invention provides an animal asphyxiation device comprising a housing ( | 01-07-2010 |
| 20100008004 | Electrical Over/Under Voltage Automatic Disconnect Apparatus and Method - A method for providing an analog or digital circuit that senses both low and high input voltage and operates to disconnect both line and neutral electrical power connections to a protected device when abnormally low or high voltages are received from a single- or multi-phase power source, and reconnects the protected device when input power has stabilized. The sensing circuit and power supply is functional with voltages up to at least 240 Vac. The nominal 120 Vac circuit is designed to withstand a 6 kilovolt surge without damage. The method does not disconnect the ground line during an out-of-tolerance voltage condition. | 01-14-2010 |
| 20100254053 | POWER DISCONNECT SYSTEM AND METHOD - A system for protecting a load from a fault on a line comprising: a detection circuit monitoring the line; and a switch interposed between the line and the load; wherein the detection circuit triggers the switch to disconnect the load from the line when the fault is detected. The detection circuit may trigger the switch within one second of detecting the fault. The detection circuit may monitor the line voltage of the line and the fault may be detected when the line voltage exceeds 125% or 130% of the normal voltage. The load may be automatically reconnected to the line when the line voltage drops to within 5% or 10% of a normal voltage. The fault may be any one or more of an open-neutral, an over-voltage, an under-voltage, a phase loss, and an external trigger, such as an access sensor, a smoke sensor, and/or a heat sensor. | 10-07-2010 |
| 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 |
| 20100328828 | SYSTEM AND METHOD FOR PROTECTING A CIRCUIT - A method of protecting a circuit includes measuring a value associated with a circuit having a current flowing through a switch to a load and comparing the measured value to a threshold. If the measured value meets or exceeds the threshold, the switch is turned OFF and a counter is incremented. If the counter is less than the counter limit, and a predefined time period has elapsed, the switch is turned back ON. | 12-30-2010 |
| 20110102956 | LOAD DRIVING DEVICE - A load driving device according to an exemplary aspect of the present invention includes: an output transistor coupled between a first power supply line and an output terminal, the output terminal being configured to be coupled with a load; a protection transistor that is provided between a gate of the output transistor and a second power supply line, and brings the output transistor into a conduction state when a polarity of a power supply coupled between the first power supply line and the second power supply line is reversed; and a back gate control circuit that controls the second power supply line and a back gate of the protection transistor to be brought into a conduction state in a standby mode when the polarity of the power supply is normal. | 05-05-2011 |
| 20110299205 | VOLTAGE PROTECTING CIRCUIT FOR ELECTRONIC DEVICE - A voltage protecting circuit includes a switch unit, an upper limited voltage detecting unit, a lower limited voltage detecting unit, and a logic control unit. When a voltage output from a voltage input interface is less than the lower limited voltage or greater than the upper limited voltage, the logic control unit outputs a control signal to turn the switch unit off. The output voltage outputted from the voltage input interface is not provided to a working circuit. When the output voltage outputted from the voltage input interface is greater than the lower limited voltage and less than the upper limited voltage, the logic control unit outputs a control signal to turn the switch unit on. The output voltage output from the voltage input interface is provided to the working circuit. | 12-08-2011 |
| 20120039005 | CURRENT CONTROLLER AND PROTECTION CIRCUIT - A current controller for generating a control signal which controls supply current flowing from a power source to a load includes an interface circuit which sets a threshold based on an instruction from an outside of the current controller, a threshold setting circuit which stores and outputs the threshold, a sensing circuit which determines a current or a temperature of a sensing element, and outputs a signal indicating that the supply current should be interrupted as the control signal if a determined current or a determined temperature exceeds the threshold, and a sensing control circuit which generates a clock signal including pulses with a predetermined period. The sensing circuit determines the current or the temperature of the sensing element during an active period of the clock signal. | 02-16-2012 |
| 20120307409 | Alternating current contactor with mechanical short circuit self-locking function - An AC contactor with a mechanical short circuit self-locking function includes an AC contactor body. The AC contactor body includes a shell body, wherein a mechanical short circuit self-locking unit is provided therein. The mechanical short circuit self-locking unit includes a short circuit detecting and triggering device for generating a triggering action when a fault of short circuit occurs; and a self-locking acting device for generating a self-locking action after receiving the triggering action, so as to disable the AC contactor to automatically reset after the fault of short circuit is removed. | 12-06-2012 |
| 20130128402 | PROTECTION RELAY APPARATUS - According to one embodiment, there is provided a protection relay apparatus that protects lines of a three-phase alternating current power system, the protection relay apparatus including a fault detector to detect a fault of the line, an opening unit to open a circuit breaker of a fault phase in which the fault has occurred through detection of the fault, a fault phase voltage measurement unit to measure a voltage of the fault phase after the circuit breaker is opened, a fault recovery determination unit to determine whether the fault is recovered or not based on the voltage, and a closing unit to close the circuit breaker when the fault recovery determination unit determines that the fault is recovered. | 05-23-2013 |
| 20130215542 | PLUG TAIL SYSTEMS - The present invention is directed to an electrical wiring system that includes a connector device having connector contacts coupled to termination structures that couple a first AC power conductor and a second AC power conductor to corresponding contacts of the plurality of connector contacts. An electrical wiring device includes a device housing having a front portion and a rear portion. The front portion includes at least one user-accessible control element disposed thereon. The at least one user-accessible control element is coupled to an electrical switch mechanism disposed in the device housing and coupled to a plurality of device contacts. The plurality of device contacts are accessible by way of a device connection arrangement formed in the rear portion of the device housing. The plurality of device contacts are configured to mate with the plurality of connector contacts when the connector device is coupled to the device connection arrangement. | 08-22-2013 |
| 20130329326 | SYSTEMS AND METHODS FOR GROUNDING POWER LINE SECTIONS TO CLEAR FAULTS - Systems and methods for dynamically clearing faults in a power transmission line involve automatically terminating ends of a section of the power line while preserving electrical and/or physical continuity of the power line. The terminating of the ends is reversed at about voltage zero-crossings in the power line to clear a fault. | 12-12-2013 |
| 20130342944 | ELECTRONIC CIRCUIT - An electronic circuit is provided that has a function of protecting an IC element ( | 12-26-2013 |
| 20150062765 | RESETTABLE CIRCUIT PROTECTION SYSTEM AND VEHICLE WITH SAME - A resettable circuit protection system for a vehicle includes a power outlet, a resettable circuit protection device, a resettable switch, a control module, and a user interface. The resettable circuit protection device is disposed in power communication with the power outlet, is operable between open and closed positions, and is configured to automatically open in response to an electrical overload condition at the power outlet. The resettable switch is electrically disposed in series with the circuit protection device, and operates between open and closed positions. The control module is disposed in signal communication with the circuit protection device and the switch. The user interface is disposed in signal communication with the control module. When the circuit protection device is open, the control module is responsive to facilitate display of a message at the user interface indicative of the circuit protection device being open, and to facilitate opening of the switch. | 03-05-2015 |
| 20160149394 | APPARATUSES AND METHODS FOR CONTROLLING POWER TO ELECTRONIC DEVICES - Methods and apparatuses for detecting when an electronic device has been exposed to moisture that could damage the electronic device, and inhibiting the flow of electrical power to the electronic device when the moisture level is too high are disclosed. Embodiments sample air within the electronic device, measure the moisture in the sampled air, inhibit the connection of electrical power to the electronic device if the moisture exceeds a threshold, and permit the connection of electrical power to the electronic device if the moisture level is below a threshold. Some embodiments measure the moisture in the ambient air to improve effectiveness. Other embodiments allow resetting of a tripped condition. Other embodiments include constant sampling of air from within the electronic device to assist drying, and inhibiting application of power to the electronic device until the electronic device is sufficiently dry. Still other embodiments interrupt power from the electronic device's battery. | 05-26-2016 |
| 361060000 | With differential voltage comparison across the circuit interrupting means | 2 |
| 20080204953 | System and method for detecting the presence of an unsafe line condition in a disconnected power meter - A method of detecting the presence of an unsafe line condition at a power metering device is disclosed. The method comprises the steps of determining if a disconnect switch is in the open position, and measuring a first voltage at a first load contact. The method measures a second voltage at a second load contact and determines if the first voltage is greater than a first voltage threshold or less than a second voltage threshold. The method further determines if the second voltage is greater than the first voltage threshold or less than the second voltage threshold. The method indicates that an unsafe condition exists if either the first voltage is greater than the first voltage threshold, or first voltage is less than the second voltage threshold or the second voltage is greater than the first voltage threshold or the second voltage is less than the second voltage threshold, when the disconnect switch is in the open position. | 08-28-2008 |
| 20120176712 | METHOD AND DEVICE FOR RECLOSING CONTROL USING A HARMONIC RATIO - The reclosing control device configured to perform a reclosing control in case of a fault in a transmission line. Further, the reclosing control device includes a voltage detection unit configured to detect a faulted phase voltage waveform and extract a harmonic component contained in the faulted phase voltage waveform; a HR calculating unit configured to calculate ratio values between even harmonics and odd harmonics based on the extracted harmonic component; and a reclosing control unit configured to determine whether or not an arc is finally extinguished based on the calculated ratio value and perform a reclosing control depending on a result of the determination. | 07-12-2012 |
