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1. 发明授权

US10355744B2 Feed line branching apparatus and feed line branching method 有权
公开(公告)号：US10355744B2
公开(公告)日：2019-07-16
申请号：US15531528
申请日：2015-12-07
申请人： NEC CORPORATION
发明人： Shohei Yamaguchi
IPC分类号： H04B3/44 , H02J4/00
摘要： Provided is a feedline branching apparatus that makes it possible for additional submarine cables to be installed easily, and with which cost increases can be restricted. For these purposes, the feedline branching apparatus comprises a branching unit and an earth unit. First, second and third terminal stations are connected to the branching unit via first, second and third cables, respectively. When the first and second cables are normal, the branching unit connects a feedline of the first cable to a feedline of the second cable, thereby forming a feedline using a first current. If one of the first and second cables is faulty, the branching unit grounds the feedline of the one of the first and second cables, while connecting the feedline of the other cable to the earth unit. The earth unit grounds a feedline of the third cable, thereby forming a feedline using a second current. When the feedline of the other cable is connected to the earth unit from the branching unit, the earth unit grounds the feedline of the other cable, thereby forming a feedline using the first current.

2. 发明授权

US10666044B2 Grounding circuit, electrical device, grounding control method, and grounding control program 有权
公开(公告)号：US10666044B2
公开(公告)日：2020-05-26
申请号：US16303218
申请日：2017-05-19
申请人： NEC Corporation
发明人： Shohei Yamaguchi
IPC分类号： H02H9/02 , H02G9/02 , H04B3/44
摘要： [Problem] To suppress current flowing to a contact of a relay when grounding a device to be grounded by connecting the contact of the relay, and to suppress arc discharge between relay contacts when the grounding state of the device to be grounded is released by disconnecting the relay contact.[Solution] A grounding circuit equipped with: a first relay contact connected to a device to be grounded; a resistor that is connected between the first relay contact and an earth, and that suppresses current flowing to the first relay contact when the contact of the first relay is closed; and a second relay contact that is connected in parallel with the resistor, and that is closed before the first relay contact is opened when the grounding state of the device to be grounded is released.

3. 发明授权

US11488792B2 Grounding circuit, electrical apparatus, grounding control method, and grounding control program 有权
公开(公告)号：US11488792B2
公开(公告)日：2022-11-01
申请号：US16630722
申请日：2018-08-03
申请人： NEC CORPORATION
发明人： Shohei Yamaguchi
IPC分类号： H01H9/54 , H01H47/00 , G01R31/327
摘要： The present invention is provided with: a first contact in a first relay connected to a circuit to be grounded; a resistor which is connected between the first contact and the earth, and which suppresses the flow of electric current to the first contact when the first contact is closed; a second contact in a second relay connected in parallel to the resistor; and an interlocking control means which inhibits opening of the first contact in a closed state when the second contact is opened, and which inhibits closing of the first contact in an open state when the second contact is closed.

4. 发明授权

US10288826B2 Node apparatus and node apparatus control method 有权
公开(公告)号：US10288826B2
公开(公告)日：2019-05-14
申请号：US15506504
申请日：2015-08-19
申请人： NEC CORPORATION
发明人： Shohei Yamaguchi
IPC分类号： G02B6/43 , G02B6/293 , H01P1/213 , H04J14/00 , H04J14/02 , H04B10/85 , G02B6/125 , H04K1/02 , G02F1/035
摘要： In order to prevent, without significantly reducing the power of a transmission path, a signal unnecessary for a branch station from being intercepted at the branch station, a node apparatus comprises: a first optical unit that outputs a first optical signal received from a first terminal station and addressed to a second terminal station and also outputs a second optical signal received from the first terminal station and addressed to a third terminal station; and a second optical unit that receives the first and second optical signals outputted from the first optical unit, optically removes a portion of the spectrum of the first optical signal, thereby generating a fourth optical signal, and passes the second optical signal as it is, thereby transmitting the second optical signal together with the fourth optical signal to the third terminal station.

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