Abstract: A power circuit protection system includes a current sensor configured to measure a first current level through a conductor of the circuit, a voltage sensor configured to measure a first voltage level across a plurality of conductors of the circuit, and a controller communicatively coupled to the current sensor and to the voltage sensor. The controller is configured to receive a first signal from the current sensor, wherein the first signal is representative of the first current level, and receive a second signal from the voltage sensor, wherein the second signal is representative of the first voltage level. Based on the first signal and the second signal, the controller is configured to determine whether to activate a first circuit protection device or a second circuit protection device.

Abstract: An electronic trip unit which includes a processing unit and a comparator circuit. The processing unit receives an input voltage, and a reset signal to reset the electronic trip unit, and generates a trip signal when sensed current of the electronic trip unit exceeds a predetermined threshold. The comparator circuit includes a first comparator which receives the trip signal from the processing unit and compares the trip signal with a predetermined reference voltage determined based on the reset signal, and a second comparator which compares a voltage generated by a power supply with the predetermined reference voltage. The comparator circuit determines whether the trip signal is for a valid trip event based comparison results of the first comparator and the second comparator.

Abstract: A method of improved reduced energy let through (RELT) mode selection in a switching apparatus includes receiving a request to disable a RELT mode of the switching apparatus, and, if the RELT mode of the switching apparatus is active, increasing a current threshold of the switching apparatus after a configurable amount of time has elapsed from the receipt of the request to disable the RELT mode.

Abstract: A circuit breaker apparatus is provided and includes a trip mechanism which is coupled to an electrical circuit and which is configured to interrupt an operation of the electrical circuit when the trip mechanism is actuated, an electronic trip unit in signal communication with and configured to actuate the trip mechanism when pre-selected conditions are satisfied, and a rating plug coupled to the electronic trip unit and configured to operate in a first mode in response to a receipt of a transmitted control signal at the rating plug, and to otherwise operate in a second mode, the first and second modes being respectively associated with first and second ones of the pre-selected conditions to be correspondingly transmitted to the electronic trip unit by which the electronic trip unit determines whether to actuate the trip mechanism.

Abstract: An electronic trip unit which includes a processing unit and a comparator circuit. The processing unit receives an input voltage, and a reset signal to reset the electronic trip unit, and generates a trip signal when sensed current of the electronic trip unit exceeds a predetermined threshold. The comparator circuit includes a first comparator which receives the trip signal from the processing unit and compares the trip signal with a predetermined reference voltage determined based on the reset signal, and a second comparator which compares a voltage generated by a power supply with the predetermined reference voltage. The comparator circuit determines whether the trip signal is for a valid trip event based comparison results of the first comparator and the second comparator.

Abstract: A method for recording and having analyzed waveform data associated with an electronic circuit breaker having an electronic trip unit is disclosed. The electronic trip unit has a communication port and is capable of providing to the communication port a first signal representative of a phase current passing through the circuit breaker, and a second signal representative of a conditional event at the circuit breaker. The method includes facilitating the connection of a waveform recorder device to the communication port of the electronic trip unit; facilitating recording in a first memory of the waveform recorder device in a circular queue fashion information relating to the first signal received from the electronic trip unit; and, in response to the second signal received from the electronic trip unit, facilitating the stopping of the recording in the first memory.

Abstract: A waveform recorder device for mounting to an electronic circuit breaker having an electronic trip unit and a communication port is disclosed. The device includes a connector configured to connect with the communication port, and a processing circuit in signal communication with the connector. The processing circuit is responsive to instructions which, when executed by the processing circuit, facilitate responding to a conditional signal received from the circuit breaker, and in response thereto recording waveform information arising from an additional signal received from the circuit breaker.

Abstract: A circuit breaker configured to be remotely operated is disclosed. The circuit breaker includes a set of main contacts configured to connect between an electrical source and an electrical load, an operating mechanism in operable communication to open and close the main contacts, and a remotely operable drive system configured to open and close the main contacts separate from actuation of the operating mechanism. The drive system includes a motor responsive to first and second control signals, a primary drive responsive to the motor, and an opening spring responsive to the primary drive, the main contacts being responsive to the opening spring. In response to the first control signal, the primary drive moves to charge the opening spring, and in response to the second control signal and the main contacts being closed, the primary drive moves to allow the opening spring to discharge thereby resulting in the main contacts opening independent of the motor.

Abstract: A method and system to improve efficiency and performance of a power supply by providing a consistent voltage level into a multiple-pole circuit breaker (10) to improve efficiency, reduce heat generation and increase the speed and consistency of “turn-on” times. A power supply (14) for changing waveform comprises circuitry for receiving at least one waveform having first and second components. Circuitry is provided for changing the first component and means for outputting a waveform comprising the outputs from the changing circuitry are also provided.

Abstract: A method and system to improve efficiency and performance of a power supply by providing a consistent voltage level into a multiple-pole circuit breaker (10) to improve efficiency, reduce heat generation and increase the speed and consistency of “turn-on” times. A power supply (14) for changing waveform comprises circuitry for receiving at least one waveform having first and second components. Circuitry is provided for changing the first component and means for outputting a waveform comprising the outputs from the changing circuitry are also provided.