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. 04, 2018
Filed:
Sep. 07, 2015
Tanashin Denki Co., Ltd., Tokyo, JP;
Kenya Matsushita, Tokyo, JP;
Masakatsu Sawada, Tokyo, JP;
Tanashin Denki Co., Ltd., Tokyo, JP;
Abstract
Provided is a leakage current value calculation device which precisely calculates a leakage current Ir which is a component caused by a ground insulation resistance value of an electric circuit, in the leakage current Iflowing through the electric circuit. The leakage current calculation deviceincludes a current measurement meanswhich measures a leakage current flowing through an electric circuit A having a predetermined protective conductor, a voltage measurement meanswhich measures respective phase-to-E phase voltages which are voltages between phases of the power supply unitof the electric circuit A and the E phase when the protective conductor is the E phase, a voltage value calculation meanswhich calculates a predetermined voltage value obtained by extracting a voltage component applied to the ground insulation resistor excluding a potential difference caused by a grounding resistor of the protective conductor, based on the respective phase-to-E phase voltages; and a current value calculation meanswhich extracts a component caused by the ground insulation resistance value, excluding a ground capacitance component, from the leakage current, based on the predetermined voltage value.