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1. 发明专利

JPH04341018A FEEDER LINE SWITCHING CIRCUIT FOR SUBMARINE BRANCHING DEVICE AND FEEDING METHOD FOR SUBMARINE COMMUNICATION SYSTEM 失效
公开(公告)号：JPH04341018A
公开(公告)日：1992-11-27
申请号：JP14066091
申请日：1991-05-17
申请人： FUJITSU LTD
发明人： INOUE YOSHIYUKI , OTA KENJI
IPC分类号： H02G9/02 , H04B3/44
摘要： PURPOSE:To simplify an operation at the switching of a feeder line and to prevent the occurrence of host switching in the feeder line switching circuit of a submarine branching device and a feeding method employing it in the submarine cable communication system employing the submarine branching device so as to branch submarine cable such as an optical submarine cable in sea to implement multi-point communication among plural land stations. CONSTITUTION:At least 1st, 2nd and 3rd lines, I, II, III branched from a connecting pint in three directions are provided on the system. The system is provided with 1st and 2nd relays K1, K2 operated by a current flowing to the 1st line I. The 1st relay K1 has braking contact k1 to disconnect the connecting point and the 2nd line II. The 2nd relay K2 has a making contact k2 to connect the 2nd line II to ground in sea. The operating current i2 of the 2nd relay is set larger than the operating current i1 of the 1st relay K2.

2. 发明专利

JPH0470128A POWER FEEDING PATH SWITCHING CIRCUIT FOR UNDERWATER BRANCHING DEVICE AND FEEDING METHOD FOR SUBMARINE CABLE COMMUNICATION SYSTEM 失效
公开(公告)号：JPH0470128A
公开(公告)日：1992-03-05
申请号：JP18215190
申请日：1990-07-10
申请人： FUJITSU LTD
发明人： INOUE YOSHIYUKI
IPC分类号： H04B10/80 , H04B3/44 , H04B10/03 , H04B10/07
摘要： PURPOSE:To switch feeding paths while forming both end feeding paths as much as possible when a fault is generated in the feeding path by providing specified first - third relays. CONSTITUTION:The driving part 107L of a first relay 107 is arranged at a first electric path 101, and a second connecting terminal 105 is grounded by a switching part 107L while being disconnected from a second electric path 102. The driving part 108L of the second relay 108 is arranged at a second electric path 102, and a first terminal 104 is grounded by a switching part 108L while being disconnected from the first electric path 101. The driving part 109L of the third relay 109 is arranged at a ground electric path 110 between the switching part 107L of the first relay 107 in the second electric path 102 and the ground, and the self-holding circuit 110 of the ground electric path 110 is formed by a first switching part 109C. Thus, when the fault is generated in the feeding path, the feeding path can be reset while forming both end feeding paths between cables except for the defective cable.

3. 发明专利

JPH0253332A FEEDER SWITCHING CIRCUIT 失效
公开(公告)号：JPH0253332A
公开(公告)日：1990-02-22
申请号：JP20536688
申请日：1988-08-18
申请人： FUJITSU LTD
发明人： TAKAHASHI MASAAKI , INOUE YOSHIYUKI
IPC分类号： H04B3/44
摘要： PURPOSE:To maintain feeding at a fault by applying both end feeding between the 2nd feeder or the 3rd feeder and the 1st feeder or applying one end feeding with the 2nd and 3rd feeders. CONSTITUTION:The feeder among the 1st feeder 111, the 2nd feeder 113 and the 3rd feeder 115 is switched, the 3rd relay 141 is provided to the 1st feeder 111, the 1st relay 121 is provided to the 2nd feeder 131, and the 2nd relay 131 is provided to the 2nd feeder 115. Then both end feeding to the 1st feeder 111 and the 2nd feeder 113, both end feeding to the 1st feeder 111 and the 3rd feeder 115, or one end feeding by both the 2nd feeder 113 and the 3rd feeder 115 are applied in response to the energizing state of each relay. Thus, even if a fault takes place in any of cables connected to the three feeders, the feeding is maintained by using other two cables.

4. 发明专利

JPS63262923A FEED SWITCHING DEVICE FOR UNDERWATER BRANCHING DEVICE 失效
公开(公告)号：JPS63262923A
公开(公告)日：1988-10-31
申请号：JP9614487
申请日：1987-04-21
申请人： FUJITSU LTD
发明人： TANIGAWA KAZUYUKI , TAKAHASHI MASAAKI , INOUE YOSHIYUKI , HARASAWA SHINICHIRO
IPC分类号： H04B3/44
摘要： PURPOSE:To suppress the influence of the fault of a communication line at minimum, by validating at least a communication path between two points by changing the feed direction of one-end feed when the fault is generated in a underwater communication line between the two points. CONSTITUTION:When a communication cable between a station A or a station B and a underwater branching device is cut off, the direction of a feed current from a station C is inverted. Corresponding to the current, the normally-open contact 21 of a second relay 2 of a polar relay which closes the normally-open contact 22, etc., is closed, and when the feed direction of a station in which no fault is generated is equal to that of the station C judging from the branching device, end-to-end feed can be performed between the stations. Furthermore, since the normally-open contact 11 of a first relay 1 by operating the relay by the feed current of the station in which no fault is generated, the self-holding state of the first relay is generated, then, since the feed current from the station B continues to flow to the ground 4 via the contact 11 and the winding of the first relay 1 even when the direction of the feed current from the station C returns to a normal direction, it is possible to perform the one-end feed independently.

5. 发明专利

JPS63189025A SWITCHING CIRCUIT FOR FEEDER PATH 失效
公开(公告)号：JPS63189025A
公开(公告)日：1988-08-04
申请号：JP2045887
申请日：1987-02-02
申请人： FUJITSU LTD , KOKUSAI DENSHIN DENWA CO LTD , NEC CORP
发明人： INOUE YOSHIYUKI , TAKAHASHI MASAAKI , TACHIKURA KOICHI , NISHIKAWA HITOSHI , OTA HAJIME , KOGURE YOSHIICHI
IPC分类号： H04B3/44
摘要： PURPOSE:To prohibit the switching of a relay contact in a state where a high voltage is impressed, by switching the feeder path which performs feeding to a repeater, etc., to double end feeding or single end feeding, and connecting a relay so as not to change a feeding connection state when a fault occurs. CONSTITUTION:The double end feeding is performed between a first feeder 1 and a second feeder 2, and the single end feeding is performed by a third feeder 3. In such a state, when a current ceases to flow on the relay K1 due to the fault of the feeder line 6 or the feeder line 7, the relay contact k1 is restored, but since the current of single end feeding flows on the relay K4, an operating state can be held by a self-holding contact k4-1. Therefore, a contact k4-2 is set an opened state, and it follows that no high voltage is impressed on the contact k1 of the relay K1, and no arc discharge is generated.

6. 发明专利

JPH08139682A POWER FEED AND MAINTENANCE DEVICE FOR OPTICAL CABLE COMMUNICATION SYSTEM 失效
公开(公告)号：JPH08139682A
公开(公告)日：1996-05-31
申请号：JP27642194
申请日：1994-11-10
申请人： FUJITSU LTD
发明人： INOUE YOSHIYUKI
IPC分类号： G02B6/00 , G02B6/46 , H04B3/44 , H04B10/07 , H04B10/077 , H04B10/079 , H04B10/29 , H04B10/80 , H04B10/17 , H04B10/08 , H04B10/16
摘要： PURPOSE: To provide a power feed and maintenance device for preventing a high voltage from being erroneously touched when performing maintenance or repair on a power feeding path concerning an optical cable communication system for performing serial constant current power feeding from terminal stations to respective repeaters on an optical cable. CONSTITUTION: Concerning the optical cable communication system for operating the repeaters by performing serial power feeding from power feeding devices 1011 and 1012 provided at both the terminal stations to an optical cable 100 equipped with the repeaters, power feeding current display parts 1041 and 1042 for displaying the presence/absence of a power feeding current on a feeder are provided at separating parts 1031 and 1032 , which are installed inside the terminal stations or near the terminal stations, for separating optical fibers housed in the optical cable and the feeder or around them.

7. 发明专利

JPH07264105A FEEDING CHANGEOVER CIRCUIT FOR SUBMARINE BRANCHING DEVICE 失效
公开(公告)号：JPH07264105A
公开(公告)日：1995-10-13
申请号：JP7263294
申请日：1994-03-17
申请人： FUJITSU LTD
发明人： OTA KENJI , INOUE YOSHIYUKI
IPC分类号： H04B3/44
摘要： PURPOSE:To prevent a relay in the feeding changeover circuit from being unstably operated by a reverse current flowing to a cable on the occurrence of a fault in a cable. CONSTITUTION:First, second and third changeover relays RL11, RL12, RL13 are arranged respectively to 1st and 2nd and 3rd branches of an electric line branched in three directions so that the direction of the operating currents is the same when viewing from the branch points. The 1st, 2nd and 3rd changeover relays respectively have contacts rc11, rc12, rc13 normally closing the 2nd, 3rd and 1st branch paths and normally opening at least the grounding path. At least the 2nd branch is provided with a selfhold relay RL 14 having a contact rc14-1 self-holding its ground path and the self-hold relay RL 14 has also a normally open contact rc14-2 forming a path by passing the normally closing contact rc13 of the 1st branch.

8. 发明专利

JPH02113735A POWER FEEDING METHOD FOR OPTICAL SUBMARINE TRANSMISSION SYSTEM 失效
公开(公告)号：JPH02113735A
公开(公告)日：1990-04-25
申请号：JP26753588
申请日：1988-10-24
申请人： FUJITSU LTD
发明人： INOUE YOSHIYUKI , SUZUKI KATSUO
IPC分类号： H04B10/03 , H04B3/44 , H04B10/80
摘要： PURPOSE:To simplify the rising procedure of power feeding by connecting a diode in series with a feeder in a forward direction to block the current flowing from a ground fault point. CONSTITUTION:Diodes D1-Dn are inserted in the forward direction to the power feeding direction at a prescribed position of a feeder branched by a submarine branching device 100 so as to feed power without being affected by a grounding fault caused in the branched feeder. That is. since the flowing of the current from the ground fault point is blocked, the rise of feeding is applied without taking the feeder having a ground fault into account. Thus, it is not required to change the feed rising procedure depending on the fault condition and the rising procedure of the feeding is simplified.

9. 发明专利

JPH0974385A OPTICAL CABLE COMMUNICATION SYSTEM 失效
公开(公告)号：JPH0974385A
公开(公告)日：1997-03-18
申请号：JP22792595
申请日：1995-09-05
申请人： FUJITSU LTD
发明人： INOUE YOSHIYUKI
IPC分类号： H04B10/032 , H04B10/077 , H04B10/29 , H04B10/80 , H04B10/17 , H04B10/02 , H04B10/16
摘要： PROBLEM TO BE SOLVED: To judge the presence/absence of power feeding in a present station and an opposite station and to perform a safe maintenance operation by detecting the potential of a feeder as power feeding polarity, comparing it with the output polarity of the present station and judging and displaying the power feeding state of both terminal stations. SOLUTION: A detection means 2 is provided inside a power feeder 1 or near the power feeder 1 and detects the potential of the feeder 5 at a point A reaching the power feeder 1 from the feeder 5 as the power feeding polarity to grounding. That is, in the detection means 2, when either positive polarity or negative polarity is detectable for the output polarity of the present station as a premise, the power feeding state is judged from the relation of the output polarity set in the power feeder and the polarity detected in the detection means 2. For instance, when the output polarity of the present station is positive, when the detected polarity is negative for instance, the power feeding only by the opposite station is judged in a judgement means 3 and the judged result is displayed at a display device 4.

10. 发明专利

JPH06237193A SUBMARINE EQUIPMENT OF SUBMARINE CABLE COMMUNICATION SYSTEM AND FAULT POINT LOCALIZATION METHOD 失效
公开(公告)号：JPH06237193A
公开(公告)日：1994-08-23
申请号：JP2154293
申请日：1993-02-10
申请人： FUJITSU LTD
发明人： INOUE YOSHIYUKI , SUMITANI HAJIME
IPC分类号： G01R31/08 , G01R31/02 , H04B3/44 , H04B3/46 , H04B17/40
摘要： PURPOSE:To locate a fault position quickly with high accuracy by measuring a static capacitance of the submarine cable up to a fault location when a cable terminal at a fault location becomes an electric open fault with respect to the fault localization method and the submarine equipments suitable for the method in the communication system in which plural submarine equipments such as repeaters and branching devices are connected in series on the way of a submarine cable and the optical submarine cable receives series feeding through feeder lines in the cable. CONSTITUTION:The submarine equipment provided with a main signal circuit 32 making communication via a submarine cable, a diode bridge 33 receiving a series feeding current from a feeder 51 at its input terminal and rectifying and outputting the feeding current, and a power supply section 31 connecting to an output terminal of the diode bridge 33 and supplying operating power to the main signal circuit 32 is provided with a charge/discharge resistor RS shunting the input terminal of the diode bridge 33 to eliminate the extension of charge/discharge time due to a high resistance of the diodes in the forward polarity in the submarine equipment when charge/discharge is executed from a land station to measure the static capacitance of the cable by the charge measurement method.

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