Title:
地絡電流測定装置及び地絡電流測定方法
Document Type and Number:
Japanese Patent JP6625866
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To accurately measure ground fault current flowing through a three-phase AC main circuit.SOLUTION: A ground fault current measuring device 1 comprises an addition unit 13. Ground fault current flowing through each of a secondary and tertiary of a current transformer with a tertiary winding connected with a main circuit is measured by an ampere meter 6, received via a communication unit 11 of the ground fault current measuring device 1 and stored in a database 14 every sampling time. The addition unit 13 refers to the database 14, adds current values at the secondary and tertiary of the current transformer with a tertiary winding for each phase, and stores the added current value for each phase in the database 14. Thus, the ground fault current in the main circuit is calculated.SELECTED DRAWING: Figure 2
Inventors:
Takuaki Matsuo
Hiroki Miyajima
Hiroki Miyajima
Application Number:
JP2015222715A
Publication Date:
December 25, 2019
Filing Date:
November 13, 2015
Export Citation:
Assignee:
Toshiba Corporation
Toshiba Infrastructure Systems & Solutions Corporation
Toshiba Infrastructure Systems & Solutions Corporation
International Classes:
G01R31/02; G01R31/08
Domestic Patent References:
| JP6284556A | ||||
| JP2008172964A | ||||
| JP2007739U | ||||
| JP60038031U |
Foreign References:
| US4297740 |
Attorney, Agent or Firm:
Kiuchi Mitsuharu