Title:
MULTIPLE-CIRCUIT ELECTRIC POWER MEASUREMENT DEVICE
Document Type and Number:
Japanese Patent JP2014142271
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To solve problems in which when a value obtained by switching and measuring respective electric energy values of a plurality of AC circuits at intervals of a unit time is converted into an electric energy value of continuous measurement, a measurement result has an error and measurement precision thereof becomes worse as the number of AC circuits to be measured increases.SOLUTION: A multiple-circuit electric power measurement device (2) includes: a control part (206) which outputs a detection current selection signal (206s); a measurement object selection part (202) which selects one detection current from a group of detection currents (201b-201f) that respective current transformers output in response to the detection current selection signal, and outputs the selected detection current as a selected detection current (202a); a voltage measurement part (204) which measures and outputs a voltage supplied to the plurality of AC circuits; and a first current measurement part (203b) which measures and outputs a current value of the AC circuit corresponding to the selected detection current based upon the selected detection current; and a first electric power measurement part (205b) which measures and outputs an electric power value based upon respective the outputs of the first current measurement part and the voltage measurement part.
Inventors:
KAWAHARA MASAKAZU
Application Number:
JP2013011087A
Publication Date:
August 07, 2014
Filing Date:
January 24, 2013
Export Citation:
Assignee:
SHARP KK
International Classes:
G01R22/00; G01R11/00; G01R21/06
Domestic Patent References:
| JP2003177148A | 2003-06-27 | |||
| JP2010038738A | 2010-02-18 | |||
| JPH05164793A | 1993-06-29 |
Attorney, Agent or Firm:
Fukami patent office