Patent application number | Description | Published |
20090122453 | UNIVERSAL RATING PLUG FOR ELECTRONIC TRIP UNIT - A rating plug for an electronic trip unit is disclosed. The rating plug has a housing with a plurality of switches disposed within the housing, each of the switches positionable in one of two positions. The settings of the switches establish a digital signature associated with the rating plug, providing for a universal rating plug that can be used on any circuit breaker that is accepting of the rating plug and that has a sensor value equal to or greater than the rating plug current rating. For instance, a rating plug having a 1000 Amp rating can be used on any circuit breaker sensor for use at or above 1000 A. | 05-14-2009 |
20090147424 | CIRCUIT BREAKERS WITH AUTOMATIC BREAKER RATING - An electronic control for a circuit breaker with automatic breaker rating is disclosed. The electronic control includes a memory to store circuit breaker ratings, a breaker rating switch to select circuit breaker ratings, and a microprocessor operatively coupled to the breaker rating switch and the memory. The microprocessor is configured to interpret a selected circuit breaker rating of the breaker rating switch, set an amplifier gain adjustment for the circuit breaker based on the selected circuit breaker rating, and transmit the selected circuit breaker rating to the memory for storage in the memory. | 06-11-2009 |
20090243590 | SYSTEM AND METHOD FOR MONITORING CURRENT IN A CONDUCTOR - The present disclosure describes a system for measuring current amplitude in a conductor, comprising at least one Rogowski coil, an integration circuit directly connected to the at least one Rogowski coil, a microprocessor circuit in communication with the integration circuit and configured to receive output from the integration circuit and to calculate energy data comprising current amplitude in the conductor. A method for measuring current in a conductor is also presented. | 10-01-2009 |
20090256426 | SYSTEM AND METHOD FOR MANAGING POWER SUPPLY TO A CIRCUIT BREAKER CONTROL UNIT - A system for controlling power in a circuit breaker trip unit is disclosed. The system includes: a user interface operably coupled to the trip unit and having a plurality of input keys; a power conditioner operably coupled to the user interface and operably coupled to a battery power source and an external power source; and a power control circuit. The power control circuit is configured to automatically electrically connect the battery power source to the power conditioner in response to activation of any of the plurality of input keys, and in the absence of an electrical connection between the external power source and the power conditioner. | 10-15-2009 |
20090257156 | METHOD OF SETTING A GROUND FAULT TRIP FUNCTION FOR A TRIP UNIT AND A TRIP UNIT HAVING A DEFINED TRIP FUNCTION FOR GROUND FAULT PROTECTION - A method of setting a trip ground fault trip function for a trip unit includes enabling a ground fault protection mode for the trip unit, and setting one of a plurality of a trip functions for the trip unit. At least one of the plurality of trip functions being an Î4t inverse time function that establishes a trip characteristic to interrupt current upon sensing a ground fault indication. The method further includes monitoring an electrical circuit for a ground fault. | 10-15-2009 |
20090257157 | CIRCUIT BREAKER HAVING SEPARATE RESTRAINED AND UNRESTRAINED ZONE SELECTIVE INTERLOCK SETTING CAPABILITY - A circuit breaker system and method having zone selective interlock features with separate restrained and unrestrained setting capability is provided. The system and method include the transmission of a selective interlock signal from a downstream circuit breaker to an upstream circuit breaker in the event of a fault condition. The upstream circuit breaker upon receipt of this signal changes the tripping response of the second circuit breaker to a restrained mode. The circuit breakers include features enabling the user to modify and adjust both the restrained and unrestrained trip curves associated with both the restrained and unrestrained modes of operation. | 10-15-2009 |
20090257158 | CIRCUIT BREAKER ZONE SELECTIVE INTERLOCK FOR DIFFERENTIATED FAULTS AND METHOD OF OPERATION - A circuit breaker system and method having zone selective interlock features is provided. The system and method include the transmission of a selective interlock signal from a downstream circuit breaker to an upstream circuit breaker in the event a first or second fault condition is detected. The upstream circuit breaker upon receipt of this signal changes the response of the second circuit breaker depending on whether the first or second fault condition has been detected. | 10-15-2009 |
20090257160 | UNIVERSAL TRIP UNIT - A universal trip unit for use with a circuit breaker apparatus is provided and includes a communication unit configured to communicate with a personality module of the circuit breaker apparatus and to thereby receive key breaker personality parameters that relate to operational characteristics of the circuit breaker apparatus, and a controller. The controller includes a memory on which a universal register, previously stored key parameters and the received key breaker personality parameters are stored, the controller being configured to control the communication unit to receive the key breaker personality parameters in accordance with information determined from the universal register, and components to execute trip protection when at least one of a current and a voltage Within the circuit breaker apparatus exceeds a respective predetermined threshold as defined by the previously stored key parameters and the received key breaker personality parameters. | 10-15-2009 |
20090257163 | CURRENT GAIN CONTROL OF CIRCUIT BREAKER TRIP UNIT - An electronic trip unit for a circuit breaker, the electronic trip unit includes a rating plug having a plurality of switches each configured to indicate a specified current rating for the rating plug and for selectively supplying a current rating for the electronic trip unit, a processing unit which receives and reads a value of the selected current rating from the rating plug upon power-up, and a gain control unit including a plurality of gain circuits. Each of the gain circuits including a plurality of gain switches set by the processing unit based upon the selected current rating, to control a gain of input current of the electronic trip unit. | 10-15-2009 |
20120185196 | DIAGNOSTIC SYSTEM AND METHOD FOR A THERMISTOR AMPLIFIER CIRCUIT - A diagnostic system and a diagnostic method for a thermistor amplifier circuit are provided. The system includes a transistor electrically coupled to a controllable variable resistor having a predetermined resistance. The transistor applies a test voltage signal to the circuit indicative of a first temperature value. An amplitude of the test voltage value is indicative of a simulated thermistor temperature value. The microprocessor determines a test temperature value based on the amplitude of an output voltage of the circuit. The microprocessor also determines an inaccuracy value based on the test temperature value and the simulated thermistor temperature value. | 07-19-2012 |
20120194118 | Methods and Systems Involving Electric Machine Controllers - A method for operating a controller includes receiving a first accumulated thermal value of an electrical machine and an associated first time stamp from a memory, initializing a processor of the controller with the first accumulated thermal value and the associated first time stamp, determining whether a second time stamp has been received, calculating a difference between the second time stamp and the first time stamp responsive to determining that the second time stamp has been received, calculating a second accumulated thermal value as a function of the first accumulated thermal value, the first time stamp, and the second time stamp, and updating the first accumulated thermal value with the second accumulated thermal value. | 08-02-2012 |
20120310429 | CIRCUIT BREAKER ZONE SELECTIVE INTERLOCK FOR DIFFERENTIATED FAULTS AND METHOD OF OPERATION - A circuit breaker system and method having zone selective interlock features is provided. The system and method include the transmission of a selective interlock signal from a downstream circuit breaker to an upstream circuit breaker in the event a first or second fault condition is detected. The upstream circuit breaker upon receipt of this signal changes the response of the second circuit breaker depending on whether the first or second fault condition has been detected. | 12-06-2012 |
20140361780 | SYSTEMS AND METHODS FOR MONITORING CIRCUIT BREAKER OPERATION - A control module coupled to a switching device that is switchable between an open state and a closed state as part of a switching event is provided. The control module includes a communication interface configured to issue a control signal to the switching device that triggers the switching device to switch between the open state and the closed state, and receive a feedback signal from the switching device indicating that the switching device has switched between the open state and the closed state. The control module further includes a processing device coupled to the communication interface and configured to calculate a characteristic time interval associated with the switching event, wherein the characteristic time interval is indicative of a mechanical switching time of the switching device, and a memory device coupled to the processing device and configured to store the calculated characteristic time interval. | 12-11-2014 |