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Title:
DISCONNECTION DISCRIMINATION DEVICE AND WIRING DISCRIMINATION DEVICE OF DC POWER SUPPLY CIRCUIT
Document Type and Number:
Japanese Patent JP2018164358
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a disconnection discrimination device of a DC power supply circuit capable of discriminating presence of disconnection and quality of wiring connection of the DC power supply circuit in a hot-line state.SOLUTION: When presence of disconnection is inspected, a connection terminal 22 is connected to an electric wire located at a DC power supply 11 side of an inspection object circuit. A compulsive grounding switch 25 of a grounding unit 23 is turned on and a connection section of the connection terminal 22 is grounded to the earth via a grounding device 24. A DC probe current limited by a current-limiting resistor 26 is supplied to an inspection object circuit from the DC power supply 11. A voltage current determination unit 29 of the grounding unit 23 performs quality determination of a ground voltage at the connection section detected by a voltage detection unit 27 and a probe current flowing through the connection section detected by a current detection unit 28. Disconnection of a DC power supply circuit is discriminated based on determination results of the voltage current determination unit 29. Therefore, disconnection of the DC power supply circuit can be discriminated even in a hot-line state.SELECTED DRAWING: Figure 1

Inventors:
TAKEI AKIHISA
OSHIMA MASASHI
Application Number:
JP2017060238A
Publication Date:
October 18, 2018
Filing Date:
March 25, 2017
Export Citation:
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Assignee:
TOKYO ELECTRIC POWER CO HOLDINGS INC
International Classes:
H02H5/08; G01R31/02
Attorney, Agent or Firm:
Mitani Kei