Class / Patent application number | Description | Number of patent applications / Date published |
324418000 | Relay | 41 |
20090009175 | CURRENT-MEASURING CLAMP ON SENSOR IN ELECTROMECHANICAL RELAYS - This invention relates to the system that detects the origin of relay or relays where failures are seen in electromechanical relays, and ensuring the repair of failure at the shortest time. System developed by this invention consists of a clamp on sensor handle, clamp on sensor ground, mumetal, magnetic area measuring sensor, clamp on sensor cable and socket. Signals sent to the recorder through the system are measured in ampere and this information is transferred to the computer. | 01-08-2009 |
20100060287 | Recording Device for Recording the Switch State of an Electromagnetic Switch Device - A recording device is for recording the switch state of an electromagnetic switch device. In at least one embodiment, the recording device includes a housing, in which a plunger is movably mounted. The plunger may be moved between two mechanical end positions, wherein the end positions of the plunger correspond to the switch states of the electromagnetic switch device. A sensor device is arranged in the housing by which it may be recorded in which of the end positions the plunger is and from which a corresponding electrical signal may be emitted. The sensor device is designed to be able to record the position of the plunger without contacting the plunger. | 03-11-2010 |
20100066376 | METHOD FOR TESTING A PROTECTIVE DEVICE, A PROTECTIVE DEVICE, AND TEST DEVICE - A method for testing a protective device as well as a correspondingly configured protective device and test device are provided. | 03-18-2010 |
20110012603 | PROTECTIVE RELAY MONITORING SYSTEM AND METHOD OF COMPARING BEHAVIOR PATTERNS - A system for collecting data and monitoring the operation of electrical circuits, such as branch circuits at a substation is provided. The system collects data from a plurality of sensors coupled to a plurality of electrical equipment associated with a circuit. The data from the sensors is collected and used to identify signatures in the data to ascertain potential issues in the electrical protective circuit. The data is further analyzed to determine signatures of abnormal operating conditions. The signatures are compared to reference signatures to identify the abnormal conditions and corrective action is initiated. | 01-20-2011 |
20110254557 | ELECTROMECHANICAL RELAYS INCLUDING EMBEDDED SENSORS - An electromechanical protective relay includes a base and an electromechanical coil supported on the base. The relay also includes a load sensor electrically coupled to the electromechanical coil that measures a current passing through the electromechanical coil and that is supported on the base, a trip contact supported on the base and located and configured such that it completes a circuit when the electromechanical coil senses an undesirable condition, and a trip sensor electrically coupled to the trip contact that measures a current passing through the trip contact and that is supported on the base. | 10-20-2011 |
20110316544 | RELAY TEST SYSTEM AND METHOD - A method of testing a relay set which includes mapping a relay set to an undirected graph indicative of a topology of the relay set and includes vertices indicative of channels of the relay set and edges extending between corresponding vertices indicative of relays. Values based on a characteristic of a relay of the relay set that corresponds to the respective edge of the undirected graph are stored. A plurality of candidate test paths for a relay-to-test that each connects a first input/output (I/O) channel and a second I/O channel, and includes the relay-to-test are identified. A total value for the edges of the candidate test paths is determined for each of the candidate test paths. The total values are compared to one another and a test path is determined for the relay-to-test based on the comparison. | 12-29-2011 |
20120212230 | TESTING A SOLENOID OF A DIRECTIONAL CONTROL VALVE - A method of testing a solenoid of a directional control valve in a subsea hydrocarbon production system, the solenoid having a coil and an armature for operating the valve and the coil being energized by a drive voltage across it, the method comprises removing or reducing the drive voltage and sensing current through the coil to produce an indication of movement of the armature. | 08-23-2012 |
20130027046 | METHOD AND DEVICE FOR TESTING SOLENOID VALVES - A device for testing a solenoid valve includes: a voltage generator for applying a short pulse of voltage, which is not long enough to open the solenoid valve, to the windings of the solenoid valve; a current meter configured for measuring the current flowing through the windings of the solenoid valve; and an analysis device which is configured for analysing the current measured by the current meter for detecting a potential fault of the solenoid valve. | 01-31-2013 |
20130082713 | WIND ENERGY INSTALLATION AND METHOD FOR TESTING A ROTATIONAL SPEED RELAY OF A WIND ENERGY INSTALLATION - The disclosure relates to checking a rotational speed relay of a wind turbine. The wind turbine comprises a rotational speed sensor for the rotational speed of a shaft. The rotational speed sensor outputs a rotational speed signal, which is fed to a signal input of the rotational speed relay. According to disclosure, the rotational speed signal fed to the rotational speed relay is first inactivated. Then a signal generator is activated, which produces a check signal equivalent to the rotational speed signal. The check signal is fed to the signal input of the rotational speed relay. The signal generator is operated with a check signal that is beyond a rotational speed limit, and a check is performed to determine if the rotational speed relay generates a switch-off command. This allows the functional capability of the rotational speed relay to be checked reliably and at low cost. | 04-04-2013 |
20130093427 | WELDED CONTACTOR CHECKING SYSTEMS AND METHODS - A system includes a plurality of batteries, first and second relays, a relay control module, and a welding indication module. The batteries are electrically connected and collectively output power for an electric motor via first and second nodes. The first relay is connected between a first output of the batteries and the first node. The second relay is connected between a second output of the batteries and the second node. The relay control module controls the first and second relays. The welding indication module commands the relay control module to open the first relay during a diagnosis period, commands the relay control module to close the second relay during the diagnosis period, and indicates whether the first relay is welded closed based on a voltage between the first and second nodes during the diagnosis period. | 04-18-2013 |
20130106423 | MAIN RELAY MONITORING DEVICE AND METHOD FOR GREEN VEHICLE | 05-02-2013 |
20130106424 | QUICK REFERENCE RELAY DIAGNOSTIC CIRCUIT | 05-02-2013 |
20130257440 | Relay Welding Detector of Battery System and Battery System Which Uses the Detector - Provided is a battery system which can ensure high safety even when the battery system is constructed using a mechanical relay. The battery system includes: a battery module where a plurality of battery cells are connected to each other in series; a switching circuit which is connected to the battery module in series; a control unit which controls the switching circuit; and a welding diagnosis circuit which diagnoses welding of the switching circuit, wherein the switching circuit is constituted by connecting a first relay switch and a second relay switch in series, and the welding diagnosis circuit includes a voltage measuring device which measures a voltage between the first relay switch and the second relay switch. | 10-03-2013 |
20130278269 | Method for Predicting the Usability of a Relay or a Contactor - A method for predicting the usability of a relay or a contactor is described herein. A current flowing through the relay or the contactor and/or a voltage applied to the relay or the contactor is measured repeatedly, and the measured values are transmitted to an observation unit. The observation unit makes a prediction relating to the usability of the relay or of the contactor on the basis of the measured values and a model. Furthermore described are an observation unit and a battery which are configured to carry out the method according to the disclosure. | 10-24-2013 |
20130300422 | METHOD FOR OPERATING A MAGNETIC SWITCHING ELEMENT - In a method for operating a magnetic switching element, at least one connection of at least one sensor device is connected to at least one connection of a coil of the magnetic switching element, and at least one measuring state is established in which the at least one connection of the coil is largely at least temporarily decoupled from a ground, a voltage source, and/or a current source activating the coil, and at least one auxiliary voltage and/or at least one auxiliary current is/are applied to the at least one connection of the coil in the measuring state, and at least one sensor signal is ascertained from at least one electrical potential, at least one potential difference, and/or at least one current flowing at the connections of the coil. | 11-14-2013 |
20140002091 | CONSTRUCTION MACHINE | 01-02-2014 |
20140002092 | ELECTROMAGNETIC OPENING/CLOSING DEVICE | 01-02-2014 |
20140009162 | System and Method for Testing a Circuit - In an embodiment, a device comprises a circuit with at least one circuit element; measurement circuitry capable to test a state of the at least one circuit element during an operation of the circuit, the measurement circuitry comprising a first terminal configured to be coupled to a first node of the circuit via a first capacitor, a second terminal configured to be coupled to a second node of the circuit, wherein the measurement circuitry is configured to determine in situ an operating state of the at least one circuit element based on signals applied by the measurement circuitry to the circuit during the operation of the circuit. | 01-09-2014 |
20140021958 | SOLENOID TRANSIENT VARIABLE RESISTANCE FEEDBACK FOR EFFECTER POSITION DETECTION - Feedback from a solenoid is achieved by adding at least one variable resistance in parallel with the solenoid current feedback circuit for position detection. The resistance has current flowing therethrough when a switching device actuated by the solenoid is in one position or transitions from one position to at least one other position. A feedback current may be measured in the current feedback circuit and the position of the switching device in response to actuation thereof by the solenoid may be determined from the measured feedback current. | 01-23-2014 |
20140184232 | TESTER FOR LIGHTNING ARRESTERS COUNTER - The designed circuit is used for testing all kinds of discharge counter for lightning arresters. Discharge counter for lightning arresters are used in substation and all power plants with various voltages and discharge currents. The lightning arresters counter tester creates the needed voltage and current that operates the counter and simulates the conditions that the counter works in; therefore it can be concluded whether the counter works well or not. | 07-03-2014 |
20140292343 | ELECTROMAGNETIC RELAY - An electromagnetic relay, includes: a housing; a contact member housed in the housing; a wiring that is housed in the housing, and is connected to the contact member; a measurement unit that is housed in the housing and inserted in the middle of the wiring, and measures a current which flows through the wiring; and a first terminal that is pulled out from the housing and is connected to the measurement unit. | 10-02-2014 |
20140333311 | RELAY DETECTION APPARATUS AND METHOD OF OPERATING THE SAME - A relay detection apparatus includes at least one relay, a voltage detection module, and a voltage comparison unit. The relay has an input contact, an output normally-open contact, and an output normally-close contact. The voltage detection module has a first voltage detection unit and a second voltage detection unit. The first voltage detection unit receives a voltage of the input contact and produces a first output voltage. The second voltage detection unit receives a voltage of the output normally-close contact and produces a second output voltage. The voltage comparison unit receives the first output voltage and the second output voltage and then compares the two voltages, thus detecting normal and/or abnormal contact statuses of the input contact, the output normally-open contact, and the output normally-close contact of the relay. | 11-13-2014 |
20140340090 | METHOD FOR SENSING WELDED CONTACTS ON A SWITCHING DEVICE - A method for sensing a welded relay contact when breaking both sides of a power line on a HVAC device including the steps: applying a first signal to one of a pair of switching devices; electronically sensing a second signal, with a sensing device, whether the other of said two switching devices is welded closed; and sending a third signal from the sensing device indicative of whether the other of said two switching devices is welded closed. | 11-20-2014 |
20140354287 | APPARATUS FOR TESTING AN ELECTROMECHANICAL RELAY - A portable apparatus for testing an electromechanical relay having Normally Closed (NC) contacts, Normally Open (NO) contacts, and an electromagnetic coil therein includes a housing, a battery, a battery test circuit, and a relay test circuit. The battery test circuit includes a first switch operable to provide a first type of indication based on a voltage output by the battery. The relay test circuit includes a second switch, and a third switch. The second switch is operable to provide a second type of indication if an electrical circuit of the relay test circuit is complete with the NC contacts of the relay. The third switch is operable to energize the electromagnetic coil and provide the second type of indication if NO contacts of the relay become closed upon energizing the electromagnetic coil, thus opening the NC contacts of the relay. | 12-04-2014 |
20150028877 | RELAY INCLUDING PROCESSOR PROVIDING CONTROL AND/OR MONITORING - A relay includes a first terminal, a second terminal, a third terminal, a fourth terminal, separable contacts electrically connected between the first and second terminals, an actuator coil comprising a first winding and a second winding, the first winding electrically connected between the third and fourth terminals, the second winding electrically connected between the third and fourth terminals, a processor, an output, a first voltage sensing circuit cooperating with the processor to determine a first voltage between the first and second terminals, and a second voltage sensing circuit cooperating with the processor to determine a second voltage between the third and fourth terminals. The processor determines that the separable contacts are closed when the first voltage does not exceed a first predetermined value and the second voltage exceeds a second predetermined value and responsively outputs a corresponding status to the output. | 01-29-2015 |
20150035539 | POWER CIRCUIT ABNORMALITY DETECTION METHOD - A power circuit abnormality detection method for a power circuit detects whether an abnormality in a power source relay exists. The power circuit includes a pre-charge circuit opening and closing a connection between a direct current power source and a smoothing condenser by bypassing the power source relay to pre-charge the smoothing condenser, and a discharge circuit connected in parallel to the smoothing condenser to discharge electric charges stored in the smoothing condenser via a discharge resistance when a discharge switch is closed. The power circuit abnormality detection method includes a step of detecting whether the open contact abnormality in the power source relay exists based on whether a charge voltage of the smoothing condenser is reduced when a predetermined period of time has elapsed since both the discharge circuit and the power source relay are closed after the pre-charge circuit is opened. | 02-05-2015 |
20150054516 | RELAY WELD DIAGNOSTIC DEVICE - In relay weld diagnostic device, a threshold value determination unit ( | 02-26-2015 |
20150054517 | DIAGNOSIS APPARATUS AND DIAGNOSIS METHOD FOR RELAY CIRCUIT - An example of a relay circuit includes: a capacitor connecting both ends of a load circuit; first and second main relays disposed in power supply lines between a direct-current power supply and the load circuit; a series circuit configured by a first resistor and a precharge relay disposed in parallel with the first main relay; and a second resistor connecting both ends of the load circuit. A discharge process is performed in which both the first main relay and the precharge relay are turned on, the second main relay is turned off, and a reactive current is caused to flow through the load circuit. In this discharge process, an abnormality of the first resistor is detected based on a both-end voltage of the capacitor detected by a voltage sensor and a resistance value that is an equivalent representation of the discharge process. | 02-26-2015 |
20150070019 | CONTROL APPARATUS - A control apparatus controls a detachable electric instrument. The control apparatus includes a drive signal output unit configured to output a drive signal to the electric instrument; a relay provided in a sending route of the drive signal; a switching unit configured to output a switching signal that switches the relay between ON and OFF; an inspection signal output unit configured to output an inspection signal that inspects the relay to the sending route in a state in which the electric instrument is not connected; and a blocking determining unit configured to determine whether the inspection signal is blocked by the relay in a state in which the relay is turned OFF by the switching signal. | 03-12-2015 |
20150115966 | EVSE WELDED CONTACTOR DETECTOR - In at least one embodiment, provided is an electric vehicle supply equipment having a line power contactor including a first line power input and a second line power input and a first line power output and a second line power output. It further has a welded contactor detector with a contactor sense circuit, the sense circuit having a first line shunt resistor network connected from the first line power contactor output to ground and a second line shunt resistor network connected from the first line power contactor output to ground. In another embodiment provided is an EVSE including a welded contactor detector with a contactor sense circuit having a bias resistor connected between the hot line relay input and the neutral line relay output. | 04-30-2015 |
20150115967 | ELECTRIC SWITCH - The invention relates to an electric switch, in particular a rocker switch, comprising a contact system and comprising a movable actuating element for switching over the contact system between two switch positions, in particular an on position and an off position. The switch has a drivable actuator, which is operatively connected to the actuating element in such a way that the actuating element in at least one of the two switch positions is moved, on driving of the actuator, into the other switch position by the actuator for switching the contact system. In particular, the actuating element is moved by the actuator from the on position to the off position of the contact system. | 04-30-2015 |
20150137819 | System and Method for Monitoring Relay Contacts - A system and method are disclosed for monitoring at least one relay contact. The system may include an emitter adapted for communication with a relay contact and configured to emit a signal, and a receiver adapted for communication with the relay contact and configured to detect a signal emitted by the emitter. The system may further include a controller adapted for communication with the emitter and receiver, and configured to determine an open or closed state of the relay contact. The controller may control the emitter to emit a signal, may determine a closed state of the relay contact if the receiver detects the signal, and may determine an open state of the relay contact if the receiver fails to detect the signal. | 05-21-2015 |
20150293176 | TESTING APPRATUS FOR SAFETY SWITCHES AND METHOD - An interface apparatus is disclosed for interfacing a testing device to a plurality of safety switches at a switch location, wherein each safety switch is connected to an electrical load circuit including at least an active line and a neutral return line. The interface apparatus comprises a plurality of actuating devices each being connectable to a respective safety switch, and a controller for controlling each actuating device to selectively connect the associated safety switch to the testing device. Each safety switch may include an RCD or RCCB device. A method of interfacing a testing device to a plurality of safety switches is also disclosed. | 10-15-2015 |
20150346282 | METHOD AND APPARATUS FOR DETECTING STATE OF RELAY - An apparatus for detecting a state of a relay includes a voltage outputter configured to output a voltage having a different voltage value for each state of each of a plurality of relays configured to switch a connection between a battery and a load, and a controller configured to determine whether each of the plurality of relays is welded based on the voltage output from the voltage outputter. | 12-03-2015 |
20160084909 | Relay Testing Assembly - A relay testing assembly is provided that tests normally open and normally closed electrical relays using a testing circuit, a housing with a pair of relay connectors, and a pair of light sources that indicate to the user the condition and operation of the relay. The relay testing circuit is designed to receive power from a power source, while a switch controls power to the relay connectors for activation of the relay coil. When a relay is tested, the lights are illuminated in one of two ways to indicate the relay is operating properly, or the relay has failed to open or close the circuit, depending on the relay type. A resettable circuit breaker prevents surges in the circuit, and a transformer is optionally provided to transform AC to DC power. Overall, the tool allows rapid testing of a relay prior to installation or during maintenance. | 03-24-2016 |
20160161560 | DIAGNOSTIC CIRCUIT TEST DEVICE - An apparatus is provided for a diagnostic circuit test device having multi-meter functionality and being adapted to provide current sourcing to an electrical system for selective measurement of a plurality of parameters thereof in powered and unpowered states. The diagnostic circuit test device comprises a conductive probe element configured to be placed into contact with the electrical system and provide an input signal thereto. A power supply is interconnected between an internal power source and the conductive probe element. Processors are electrically connected to the conductive probe element and configured to manipulate the input signal provided to the electrical system and receive an output signal in response to the input signal. The output signal is representative of at least one of the parameters of the electrical system. A display device is configured to display a reading of the output signal which is representative of the parameter. | 06-09-2016 |
20160195582 | APPARATUS AND METHOD FOR MONITORING THE FUNCTION OF A SAFETY SWITCH MEANS | 07-07-2016 |
324421000 | To evaluate contact resistance | 1 |
20140055142 | METHOD AND APPARATUS FOR THE MEASUREMENT OF A RESISTANCE OF A SWITCHING CONTACT OF AN ELECTRICAL CIRCUIT BREAKER - An apparatus and method for the measurement of a resistance of a switching contact of an electrical circuit breaker. A first resistance value across the circuit breaker is determined while the circuit breaker is grounded at both sides and the switching contact is closed. Further, a second resistance value across the circuit breaker is determined while the circuit breaker is grounded at both sides and the switching contact is open. The resistance of the closed switching contact is then determined based on the first resistance value and the second resistance value. | 02-27-2014 |
324423000 | To evaluate contact response time | 3 |
20110062960 | DEVICE AND METHOD TO MONITOR ELECTRICAL CONTACT STATUS - A method and apparatus for generating a status of an electrical contact pair in an electromagnetic switch by triggering an armature movement at a substantially consistent electrical phase angle, determining a magnetic lag angle between the electromagnetic switch closing and the electrical contact pair change of state, and generating a contact status using the magnetic lag angle is provided | 03-17-2011 |
20110241692 | RELAY END-OF-SERVICE-LIFE FORECASTING DEVICE - Forecasting the end of the service life of a relay more accurately due to the effects of the load conditions and the environmental conditions can occur through diagnosing the end of service life of the relay based on the time, until the point in time that the actual opening or closing of the relay is detected, from the point in time of the application of the power to the relay or the point in time of the end of application of power to the relay coil by the controlling portion. Forecasting the end of the service life of the relay based on time, increases accuracy because time is a value that is not affected by the external environment. Additionally, because the end of the service life is forecasted based on the actual opening/closing of the relay, not only is it possible to detect immediately a fault in the relay, but it is also possible to eliminate the effects due to individual differences. | 10-06-2011 |
20140002093 | RELAY CONTACT MONITORING AND CONTROL | 01-02-2014 |