US 12,149,064 B2
Power supply system, ground fault detection method and program
Naoki Hanaoka, Musashino (JP); Hidetoshi Takada, Musashino (JP); Toshimitsu Tanaka, Musashino (JP); and Masaki Kozai, Musashino (JP)
Assigned to Nippon Telegraph and Telephone Corporation, Tokyo (JP)
Appl. No. 17/924,301
Filed by Nippon Telegraph and Telephone Corporation, Tokyo (JP)
PCT Filed May 18, 2020, PCT No. PCT/JP2020/019677
§ 371(c)(1), (2) Date Nov. 9, 2022,
PCT Pub. No. WO2021/234789, PCT Pub. Date Nov. 25, 2021.
Prior Publication US 2023/0187924 A1, Jun. 15, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H02H 3/00 (2006.01); H02H 3/16 (2006.01)
CPC H02H 3/16 (2013.01) 6 Claims
OG exemplary drawing
 
5. A ground fault detection method performed by a feeding system that feeds power to a load,
wherein the feeding system includes only one device that has neutral point high-resistance between a feeding line and the earth,
wherein the device functions as a ground fault overvoltage detection type of ground fault detector,
wherein the feeding system further comprises a control device, and
wherein, in response to the ground fault overvoltage detection type of ground fault detector detects a ground fault, the ground fault overvoltage detection type of ground fault detector transmits, to the control device via a signal line, a signal indicating that the ground fault has occurred.