The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 11, 2001
Filed:
Mar. 27, 2000
John B. Kammeter, Sandston, VA (US);
Power Distribution, Inc., Richmond, VA (US);
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.