Abstract: A method of configuring a power meter may include comparing a maximum power measurable by the power meter to a pulse output power comprising a pulse having an initial pulse weight and an initial pulse duration. The power meter may change at least one of the pulse weight and the pulse duration until the pulse output power is at least equal to the maximum power measurable by the power meter.

Abstract: A string monitor comprises a modular base unit and one or more sensor modules which may include sensor modules for measuring DC voltage and current.

Abstract: A split core sensing transformer comprises a first core portion and a second core portion joined to the first core portion for pivoting relative to the first core portion about a first axis and for rotation relative to the first core portion about a second axis substantially normal to said first axis.

Abstract: A current switch self-calibrates when a reset control is actuated and displays an expected current in the monitored conductor, one or more trip points of the current switch and the last known current in the monitored conductor.

Abstract: The accuracy and flexibility of a branch circuit monitor is improved by storing specifications, including error correction factors, for a plurality of current transformers in the monitor's memory and enabling current transformers with stored specifications to be selected for use with the monitor.

Abstract: A gas sensing device that includes differential temperature compensation.

Abstract: A power monitoring system includes a plurality of current sensors suitable to sense respective changing electrical current within a respective conductor to a respective load and a conductor sensing a respective voltage potential provided to the respective load. A power monitors determines a type of circuit based upon a signal from at least one of the current sensors and a signal from the conductor, wherein the type of circuit includes at least one of a single phase circuit, a two phase circuit, and a three phase circuit. The power meter configures a set of registers corresponding to the determined type of circuit in a manner such that the configuring is different based upon each of the single phase circuit, two phase circuit, and three phase circuit suitable to provide data corresponding to the determined type of circuit.

Abstract: The size of a status indicator for monitoring a current in a power cable is reduced by integrating a bobbin for the secondary winding with a current transformer core and integrating a circuit board including output terminals with a current transformer assembly.

Abstract: A tool for configuring a branch current monitor facilitates mapping the connections of branch circuits to voltage sources in a power distribution panel.

Abstract: A phase canceling current transducer for a power meter includes an error correction unit including a memory for storing error correction factors. A data processing device of the error correction unit adjusts the output of the transducer to correct for phase and ratio errors produced by the transducer current transformer or to cause the transducer's output to mimic the output of another current transducer.

Abstract: A current switch self-calibrates when a reset control is actuated and displays an expected current in the monitored conductor, one or more trip points of the current switch and the last known current in the monitored conductor.

Abstract: A string monitor comprises a modular base unit and one or more sensor modules which may include sensor modules for measuring DC voltage and current.

Abstract: A meter for measuring electric power consumed by a plurality of branch circuits includes interchangeable current transformers including respective transformer memories for storage of transformer characterization data and enables self-discovery of a phase shift induced by respective current transformers and the phase of current conducted by each branch circuit.

Abstract: A power meter for monitoring current in a power cable annunciates an alarm if the current transgresses one or more alarm current limits. False alarms are avoided by delaying the activation of the alarm for a delay interval following determination that current is flowing in the monitored conductor.

Abstract: A current switch that can be reset when it is not powered automatically calibrates itself when the circuit monitored by the current switch is energized.

Abstract: A power and energy meter self configures the pulse weight and pulse duration for pulse communication.

Abstract: The quantity of data stored in a branch circuit monitor and accessible by a data processing network is increased by logically dividing the monitor's memory into a plurality of registers each comprising a plurality of pages and addressing a page containing the desired data with an address corresponding to the identity of a page number stored in a page register and the identity of the register.

Abstract: A power monitoring system that reduces the need for external power calculation devices while simplifying the configuration of power meters.

Abstract: The flexibility of a branch circuit monitor is improved by a signal conditioning unit that outputs a voltage in response to an input voltage and which is configurable to output the same range of output voltages in response to input voltages varying over different ranges.

Abstract: The accuracy and flexibility of a branch circuit monitor is improved by storing specifications, including error correction factors, for a plurality of current transformers in the monitor's memory and enabling current transformers with stored specifications to be selected for use with the monitor.