PROBLEM TO BE SOLVED: To properly prevent electric shock of a human body even when a ground default accident occurs in an electrically conductive cable or the like for connecting a power source and an electric vehicle in a ground fault detector.SOLUTION: A ground fault detector 6 is connected to an electrically conductive cable 5 for connecting a power supply 4 for charging and discharging electric power while insulated from the ground and an electric vehicle 7, and detects occurrence of a ground fault. The ground fault detector 6 includes: a current sensor 6a; and a ground fault determining unit 6d that sets the current of about half of human body protection current as a threshold value, determines that a ground fault has occurred when detection current detected by the current sensor 6a exceeds the threshold value, and that controls the power supply 4 and/or the electric vehicle 7 to stop power output. This configuration allows the ground fault detector 6 to appropriately prevent an electric shock to the human body even when a ground fault accident occurs in the conductive cable 5 or the like.SELECTED DRAWING: Figure 2
【課題】地絡検出器において、電源と電動車両とを接続する導電性ケーブルなどで地絡事故が生じた場合においても、適切に人体の感電を防止する。【解決手段】地絡検出器6は、大地と絶縁されて電力の充放電を行うための電源4と、電動車両7との間を接続する導電性ケーブル5に接続され、地絡の発生を検出する。この地絡検出器6は、電流センサ6aと、人体保護電流の略半分の電流を閾値とし、電流センサ6aで検出される検出電流が閾値を超える場合に地絡が発生していると判断し、電源4又は/及び電動車両7に対して電力を出力停止するよう制御する地絡判断部6dと、を備える。この構成により、地絡検出器6は、導電性ケーブル5などで地絡事故が生じた場合においても、適切に人体への感電を防止できるようにする。【選択図】図2
GROUND FAULT DETECTOR
地絡検出器
2017-02-09
Patent
Elektronische Ressource
Japanisch
IPC: | H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS , Schutzschaltungsanordnungen / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung |
GROUND FAULT DETECTOR AND GROUND FAULT DETECTION METHOD
Europäisches Patentamt | 2021
|GROUND FAULT DETECTOR AND CHARGING/DISCHARGING SYSTEM
Europäisches Patentamt | 2015
|CONNECTION DIAGNOSTIC DEVICE FOR GROUND FAULT DETECTOR
Europäisches Patentamt | 2018
|