US 12,327,995 B2
Grounding device, grounding method, and program recording medium
Yoshinari Takigawa, Tokyo (JP)
Assigned to NEC CORPORATION, Tokyo (JP)
Appl. No. 18/266,314
Filed by NEC Corporation, Tokyo (JP)
PCT Filed Dec. 3, 2021, PCT No. PCT/JP2021/044405
§ 371(c)(1), (2) Date Jun. 9, 2023,
PCT Pub. No. WO2022/131013, PCT Pub. Date Jun. 23, 2022.
Claims priority of application No. 2020-209805 (JP), filed on Dec. 18, 2020.
Prior Publication US 2024/0039273 A1, Feb. 1, 2024
Int. Cl. H02H 7/00 (2006.01); H02H 7/20 (2006.01)
CPC H02H 7/20 (2013.01) 10 Claims
OG exemplary drawing
 
1. A grounding device comprising:
a determination circuit configured to determine whether a temperature of an impedance circuit being a circuit that has a predetermined impedance and is to be connected between a sea earth and an in-submarine-device feed line that is installed in a submarine device and supplies power to an electrical component in the submarine device exceeds a threshold value;
a first connection circuit configured to connect both terminals of the impedance circuit when a result of the determination indicates that the temperature exceeds the threshold value;
a first switching circuit configured to switch, between the in-submarine-device feed line and the sea earth, a connection destination of a first terminal connected to a power supply circuit of a first land station;
a second switching circuit configured to switch, between the in-submarine-device feed line and the sea earth, a connection destination of a second terminal connected to a power supply circuit of a second land station; and
a third switching circuit configured to switch, between the in-submarine-device feed line and the sea earth, a connection destination of a third terminal connected to a power supply circuit of a third land station.