Class / Patent application number | Description | Number of patent applications / Date published |
361930600 | Transformer sensor (i.e., toroidal current sensor) | 21 |
20080239606 | Combination current sensor and relay - A protection device for monitoring current in a power cable to an electrical device and for controlling a remotely located starter for the electrical device in response to a system controller. The device includes a transformer magnetically linked with the power cable to produce a voltage signal in response to the presence of a changing current within the power cable. An input circuit located in a single housing together with the transformer is electrically connected to the transformer so as to receive the voltage signal. The input circuit produces, in response to the voltage signal, either a first signal or a first circuit condition at the output terminal of the input circuit, representative of the changing current in the power cable. A switch circuit also in the same container with the transformer has a terminal for sensing either a second signal or a second circuit condition of the remotely located system controller. The switch circuit has a second terminal to provide either a third signal or a third circuit condition effective to control the starter, in response to sensing one of the second signal and the second circuit condition. All of the transformer, the input circuit, and the switch circuit are located in a single unitary package which is easily mounted and adjusted to a desired position. | 10-02-2008 |
20090086396 | CURRENT FAULT DETECTOR AND CIRCUIT INTERRUPTER AND PACKAGING THEREOF - A power controller is positioned within a current path between the line side and the load side of an electrical circuit. The power controller closes the current path in the presence of a control supply and opens the current path in the absence of the control supply. A power supply electrically connected to the current path provides the control supply. A sensor system receives power from the power supply, monitors the current in the current path and outputs a sensor signal indicative of a current condition within the current path. A logic controller also receives power from the power supply, receives the sensor signal and removes the control supply from the power controller when the sensor signal does not satisfy an established criteria. The sensor system may include one or both of an imbalance sensor for monitoring the current balance among two or more electrical lines and over-current sensors for monitoring current in individual lines. | 04-02-2009 |
20090185322 | Combination current sensor and relay - A protection device for monitoring current in a power cable to an electrical device and for controlling a remotely located starter for the electrical device in response to a system controller. The device includes a transformer magnetically linked with the power cable to produce a voltage signal in response to the presence of a changing current within the power cable. An input circuit located in a single housing together with the transformer is electrically connected to the transformer so as to receive the voltage signal. The input circuit produces, in response to the voltage signal, either a first signal or a first circuit condition at the output terminal of the input circuit, representative of the changing current in the power cable. A switch circuit also in the same container with the transformer has a terminal for sensing either a second signal or a second circuit condition of the remotely located system controller. The switch circuit has a second terminal to provide either a third signal or a third circuit condition effective to control the starter, in response to sensing one of the second signal and the second circuit condition. All of the transformer, the input circuit, and the switch circuit are located in a single unitary package which is easily mounted and adjusted to a desired position. | 07-23-2009 |
20090190279 | ELECTRONIC LOAD CONTROL UNIT (ELCU) USED AS BUS TIE BREAKER IN ELECTRICAL POWER DISTRIBUTION SYSTEMS - The present invention provides an electrical power distribution system that includes a first primary distribution panel (PDP) connected to a first source of electrical power and a second PDP connected to a second source of electrical power. The second PDP is connected to the first PDP by a conductor. A first ELCU receives signals corresponding to the flow of current through the first PDP to a load. A second ELCU receiving signals corresponding to the flow of current between the first PDP and the second PDP and a third ELCU receives signals corresponding to the flow of current between the second PDP and the first PDP. The first, second and third ELCUs protect the electrical power distribution system from a variety of fault conditions. | 07-30-2009 |
20090323242 | DISCONNECTOR AND OVERVOLTAGE PROTECTION DEVICE - An object of the present invention is to provide a disconnector that satisfies applying a lightning surge current, blocking a follow current, being capable of short circuit breaking, and being compact in size and an overvoltage protection device combining the disconnector with overvoltage protectors. The disconnector of the present invention comprises: a current transformer that detects a current flowing through electric wires; a rectifying part that rectifies the current outputted from the current transformer; a charging part that charges the current outputted from the rectifying part; a switching part that disconnects the electric wires upon driving; and a trigger part that drives the switch when the charge stored in the charging part becomes a predetermined drive area. In this regard, the drive area is set larger than the charge that can be stored in the charging part by a lightning surge current. The disconnector of the present invention and the overvoltage protectors may be combined to constitute the overvoltage protection device. | 12-31-2009 |
20100002350 | PROTECTIVE DEVICE AND METHOD FOR ITS OPERATION - A protective device is disclosed for combination with an electrical switching device including a main current line or for integration in such a switching device. In at least one embodiment, the protective device includes a switching element and a switching apparatus, which is provided for the actuation of the switching element and is influenced by a current flow through the main current line. In at least one embodiment, in order to influence the switching apparatus, a current transformer is integrated in the main current line and an electrical resistance of a secondary winding surrounded by the current transformer can be measured. A method for operating a protective device is also disclosed wherein the switching apparatus is triggered so as to actuate the switching element if the measured resistance reaches or exceeds a predetermined or predeterminable threshold value. | 01-07-2010 |
20100067160 | LEAKAGE CURRENT PROTECTION PLUG AND INTERRUPT PROTECTION PLUG CONTACT SPRING STRUCTURE - A leakage current protection plug includes a plug housing, a power supply cord, two copper legs embedded within the plug housing, a leakage current protection device composed of two main moving contacts. A reset button presses the moving contacts to contact the two copper legs, a winding assemble, an iron core, a circuit board assemble, an ZCT. Ends of moving contacts are arranged with contacts that conduct individually with the two copper legs upon coming into contact; the power supply cord, through the ZCT, is connected with the moving contacts; the output of the ZCT is connected with the input of the amplification circuit on the circuit board, while the output of the amplification circuit is connected with the winding assemble. | 03-18-2010 |
20100321848 | COMBINATION CURRENT SENSOR AND RELAY - A protection device for monitoring current in a power cable to an electrical device and for controlling a remotely located starter for the electrical device in response to a system controller. The device includes a transformer magnetically linked with the power cable to produce a voltage signal in response to the presence of a changing current within the power cable. An input circuit located in a single housing together with the transformer is electrically connected to the transformer so as to receive the voltage signal. The input circuit produces, in response to the voltage signal, either a first signal or a first circuit condition at the output terminal of the input circuit, representative of the changing current in the power cable. A switch circuit also in the same container with the transformer has a terminal for sensing either a second signal or a second circuit condition of the remotely located system controller. The switch circuit has a second terminal to provide either a third signal or a third circuit condition effective to control the starter, in response to sensing one of the second signal and the second circuit condition. All of the transformer, the input circuit, and the switch circuit are located in a single unitary package which is easily mounted and adjusted to a desired position. | 12-23-2010 |
20110096450 | COMBINATION CURRENT SENSOR AND RELAY - A protection device for monitoring current in a power cable to an electrical device and for controlling a remotely located starter for the electrical device in response to a system controller. The device includes a transformer magnetically linked with the power cable to produce a voltage signal in response to the presence of a changing current within the power cable. An input circuit located in a single housing together with the transformer is electrically connected to the transformer so as to receive the voltage signal. The input circuit produces, in response to the voltage signal, either a first signal or a first circuit condition at the output terminal of the input circuit, representative of the changing current in the power cable. A switch circuit also in the same container with the transformer has a terminal for sensing either a second signal or a second circuit condition of the remotely located system controller. The switch circuit has a second terminal to provide either a third signal or a third circuit condition effective to control the starter, in response to sensing one of the second signal and the second circuit condition. All of the transformer, the input circuit, and the switch circuit are located in a single unitary package which is easily mounted and adjusted to a desired position. | 04-28-2011 |
20110279942 | SURGE CURRENT SENSOR AND SURGE PROTECTION SYSTEM INCLUDING THE SAME - The present invention may provide a surge current sensor and a surge protection system that deploys one or more surge current sensors. The surge current sensor may be placed on or near to a conduit, and it may be used for sensing the surge current conducted therein. The surge current sensor may include a current transformer and a processor. The current transformer may be used for receiving a magnetic flux generated by the surge current and transforming the received magnetic flux to a voltage. The processor may be coupled with the current transformer, such that it may be configured to generate a digital signal based on the voltage. Once the digital signal indicates that the magnitude of the surge current has exceeded a predefined threshold, the surge protection system may initiate a surge protection mechanism. | 11-17-2011 |
20120140371 | Device and Method for Providing a Quantity of Energy in Said Supply Device for Consumer - Supply device for providing electrical energy to a consumer electrical circuit, containing a protection and monitoring device ( | 06-07-2012 |
20120212872 | SYSTEM AND METHOD FOR PROTECTION OF ELECTRICAL APPLIANCES - An electrical circuit for protecting an electrical load from overload current is provided. The system includes a voltage transformer configured to receive AC mains voltage from an electric mains supply and further configured to apply reduced voltage to the electrical load. A control switch comprising metal contacts is connected to the voltage transformer. The control switch is configured to facilitate application of reduced value of AC mains voltage to the electrical load. A reduced value of current flowing through the electrical load is measured by a current transformer connected in series with the electrical load. The reduced value of current is then used for estimating a current consumption value in event of AC mains voltage being directly applied to the electrical load. A control signal is then used for disconnecting the electrical circuit if the estimated current consumption value is greater than threshold overload current value. | 08-23-2012 |
20120287544 | ISOLATION-TYPE AC FAULT CURRENT LIMITED CIRCUIT - An isolation-type AC fault current limited circuit is a current regulation circuit including a transformer and a conduction circuit. The transformer includes a primary winding coupled in series between a power supply input system and a load output system, and a secondary winding sharing a common iron core with the primary winding and electrically isolated therewith. The conduction circuit is connected to the secondary winding and includes a switch and a breaking element coupled in series. In the event that short circuit takes place on the power system, the breaking element induces great short circuit current of the primary winding and is fused to cut off conduction, so that the transformer becomes an open circuit to increase magnetizing reactance with high impedance to increase equivalent internal impedance of the power supply input system to limit fault current and allow circuit breaking devices of the power system to isolate short circuit. | 11-15-2012 |
20140098451 | Inductive fault current limiter with divided primary coil configuration - An inductive fault current limiter ( | 04-10-2014 |
20140192450 | Fault Current Limiter - A fault current limiter (FCL) includes at least one magnetisable core member and at least one AC magnetomotive force source configured to generate a varying magnetic flux in at least a portion of the at least one magnetisable core member. At least one static magnetomotive force source is positioned to provide a magnetic circuit within at least part of the at least one magnetisable core member and the AC magnetomotive force source and the static magnetomotive force source are relatively positioned to be orthogonal to each other. Typically the static magnetomotive force source may be a permanent magnet and the AC magnetomotive force source configured to generate a varying magnetic flux in both of first and second spaced core members. | 07-10-2014 |
20140233143 | PROTECTION AND CONTROL SYSTEM, PROTECTION AND CONTROL DEVICE, AND MERGING UNIT - A protection and control system includes a first merging unit which obtains an electric variable from a transformer, and digitally converts the obtained electric variable to output the converted electric variable as first electric variable information to a first network, a plurality of first protection and control devices, each of which obtains the first electric variable information from the first merging unit through the first network, judges whether or not a system fault occurs, and outputs main trip information to the first network when that the system fault occurs is judged, and a second protection and control device which obtains the first electric variable information from the first merging unit through the first network, judges whether or not the system fault occurs in the zone to be protected of the electric power system. | 08-21-2014 |
20150043119 | ELECTRICAL POWER DISTRIBUTION NETWORK MONITORING AND CONTROL - An electrical power distribution network may include a plurality of transformers and a local manager associated with a transformer. Each local manager may be configured to monitor and control a magnetic flux level in a magnetic flux core of the associated transformer. The electrical power distribution network may also include a central manager configured to receive magnetic flux level data from each local manager and control operation of each local manager in response to the magnetic flux level data. | 02-12-2015 |
20150055263 | SOLID STATE FAULT CURRENT LIMITER - A solid-state fault current limiter including a current splitting reactor, comprising a system current input, a passive current output and a control current output. A voltage control reactor includes a first end and a second end, the first end coupled to the control current output and the second end coupled to the passive current output. A fault current trigger circuit coupled in parallel with the voltage control reactor and configured to open when a fault current, received by the system current input, exceeds a predefined trigger current. A transient voltage control circuit coupled in parallel with the voltage control reactor to receive the fault current. | 02-26-2015 |
20150346261 | FAULT ARC DETECTION METHOD AND DETECTION DEVICE - A fault arc detection method includes: sampling an instantaneous current value of a circuit; using the instantaneous current value to predict a current peak value and, when the predicted current peak value is greater than a predetermined threshold, determining that a first energy fault arc is to appear; and comparing a time domain or frequency domain feature of the instantaneous current value with a reference time domain feature or a reference frequency domain feature of the current of a fault arc of the circuit. When the similarity between the time domain or frequency domain feature and the reference time or reference frequency domain feature of the current of the fault arc reaches a predetermined range, a second energy fault arc is determined to appear. The method and detection device detect the occurrence of a fault arc early and they are able to distinguish different types of fault arcs. | 12-03-2015 |
20160111230 | MOLDED CASE CIRCUIT BREAKER WITH CURRENT SENSING UNIT - A circuit breaker, and method of assembling the circuit breaker, includes a circuit breaker housing defining an interior portion, and which includes a molded base and a separable cover. The molded base includes an interior surface and an exterior surface. The exterior surface of the molded base is operatively disposed outside of the interior portion of the circuit breaker housing, and the exterior surface of the base defines at least one current sensing unit receiving cavity configured to receive a current sensing unit therein. The molded base and separable cover are cooperatively disposed to surround the interior portion of the circuit breaker housing. | 04-21-2016 |
20160190791 | DC CIRCUIT BREAKER AND CIRCUIT BREAKING METHOD OF THE DC CIRCUIT BREAKER - Disclosed embodiments relate to a DC circuit breaker and a circuit breaking method thereof which comprises: a measuring portion for measuring a DC current conducted through a first circuit portion; the first circuit portion for conducting and blocking the DC current; and a second circuit portion for conducting and blocking the DC current which is bypassed from the first circuit portion and controlling the open/close operation of the first circuit portion according to a measuring result of the measuring portion, wherein, in the first circuit portion and the second circuit portion, switching elements, which are included in each of them, are connected in a parallel configuration such that a high switching operation during a blocking operation can be improved and the DC current can be blocked in a safer and more efficient manner, and a circuit breaking method of the DC circuit breaker. | 06-30-2016 |