Title:
漏電検出装置
Document Type and Number:
Japanese Patent JP7445894
Kind Code:
B2
Abstract:
To provide an electric leakage detection device that is a neutral point grounding type to suppress power consumption during steady state and ground fault and improve detection accuracy.SOLUTION: An electric leakage detection device in which resistance elements R1 and R2 are connected in series at a midpoint N1 between a positive electrode line L1 and a negative electrode line L2, comprises a midpoint potential clamp circuit 30 that allows a midpoint potential V1 of the midpoint N1 to fluctuate between a predetermined positive potential and a negative potential, a ground fault current circuit 10 having a control end Con1 whose one end is connected to the line L1 and which controls the current in a current path by the midpoint potential V1, and a ground fault current circuit 20 having a control end Con2 whose one end is connected to the line L2 and which controls the current in the current path by the midpoint potential V1. A potential Vo of an output point N2, which is the other end of each of the ground fault current path circuits 10 and 20, is configured to follow the potential of the control ends Con1 and Con2, and the ground fault current flowing during the ground fault of the line L1 or L2 is detected by detection circuits 40 and 50.SELECTED DRAWING: Figure 1
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Inventors:
Shoji Haneda
Application Number:
JP2020219384A
Publication Date:
March 08, 2024
Filing Date:
December 28, 2020
Export Citation:
Assignee:
anp corporation
Kanzaki Sangyo Co., Ltd.
Kanzaki Sangyo Co., Ltd.
International Classes:
H02H3/16; G01R31/52; H02J1/00
Domestic Patent References:
| JP50127630U | ||||
| JP2010043916A | ||||
| JP55029211A |
Foreign References:
| WO2013153596A1 |
Attorney, Agent or Firm:
Takashiro Kojima
Noriko Kawai
Noriko Kawai