Branch circuit monitor
DCFirst Claim
1. A branch circuit monitor for monitoring parameters of power on each of a plurality of branch circuits extending from a panel board or circuit breaker box, said panel board or circuit breaker box including a plurality of circuit breakers arranged to distribute power from a main line that is terminated within the panel board or circuit breaker box to a plurality of branch circuits, comprising:
- a plurality of non-contact current sensors arranged to monitor currents in wires of branch circuits extending from said panel board or circuit breaker box, said non-contact current sensors surrounding said branch circuit wires; and
a controller module, wherein the controller module is connected to an output of the non-contact current sensors, and wherein the controller module is arranged to process, for each of said branch circuits, currents measured by the non-contact current sensors, and wherein said non-contact sensors are mounted on a circuit board positioned near to said panel board or circuit breaker box.
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Accused Products
Abstract
A branch circuit monitor includes a plurality of non-contact current sensors arranged to sense current on each of a plurality of branch circuits, the non-contact current sensors being connected to a common digital signal processor (DSP) module having as inputs the outputs of the current sensors and also voltage inputs from each power source. The digital signal processor is arranged to calculate not only overall energy consumption, but also RMS voltage, RMS current, power factor, real power, and/or apparent power for each branch circuit. Preferably, the non-contact current sensors are in the form of miniature non-contact Rogowski coils or induction transducers. Data from the digital signal processor may be made available via communications protocols such as Modbus RTU or RS232/RS485/422, to any number of remote sites. The individual branch circuit monitors can be wired in a daisy chain or star network configuration and even connected to the Internet via an appropriate interface device.
152 Citations
9 Claims
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1. A branch circuit monitor for monitoring parameters of power on each of a plurality of branch circuits extending from a panel board or circuit breaker box, said panel board or circuit breaker box including a plurality of circuit breakers arranged to distribute power from a main line that is terminated within the panel board or circuit breaker box to a plurality of branch circuits, comprising:
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a plurality of non-contact current sensors arranged to monitor currents in wires of branch circuits extending from said panel board or circuit breaker box, said non-contact current sensors surrounding said branch circuit wires; and
a controller module, wherein the controller module is connected to an output of the non-contact current sensors, and wherein the controller module is arranged to process, for each of said branch circuits, currents measured by the non-contact current sensors, and wherein said non-contact sensors are mounted on a circuit board positioned near to said panel board or circuit breaker box. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification