@article{oai:oacis.repo.nii.ac.jp:00002410,
 author = {酒井, 久治 and 北野, 庸介 and 熊谷, 和哉 and 勇, 洋二 and 山根, 勝行},
 issue = {2},
 journal = {日本水産工学会誌, Journal of Fisheries Engineering},
 month = {},
 note = {A earth monitoring system which consists of a zero-phase-sequence current transformer (ZCT), current relay (OCG) and three condensers was constructed in order to detect the accident point for the lower ground fault resistance on the electrical machinery, apparatus and lines.
It was installed on a a.c. 100V feeder panel in the research and training vessel Umitaka maru, while measurement was carried out to evaluate the performance of the device. As a result, the following issues were clarified. 100mA in the ground fault current was measured by this device, and then the alam of a 'lower ground fault resistance' was confimed on the data-logger when the ground fault resistance was Iowered to 0.6kΩ.
In this case, the decrease of 20 mA in the ground fault current was confirmed when the condenser was not comected to the feeder. However, the detection of the lower ground fault resistance while not comected to the condenser was still possible.},
 pages = {159--164},
 title = {研究練習船における接地事故監視装置の開発},
 volume = {40},
 year = {2003}
}