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1. 发明专利

JPS60139136A MONITOR CONTROL SYSTEM FOR LINE SWITCHING DEVICE 失效
公开(公告)号：JPS60139136A
公开(公告)日：1985-07-23
申请号：JP24369983
申请日：1983-12-26
申请人： FUJI ELECTRIC CO LTD , FUJI FACOM SEIGIYO
发明人： SUZUKI ISAMU , OOHASHI KAZUHIRO
IPC分类号： H02J13/00

2. 发明专利

JPS6080774A DETECTION OF DISCONNECTION IN THREE-PHASE AC CIRCUIT 失效
公开(公告)号：JPS6080774A
公开(公告)日：1985-05-08
申请号：JP18965783
申请日：1983-10-11
申请人： FUJI ELECTRIC CO LTD , FUJI FACOM SEIGIYO
发明人： OOHASHI KAZUHIRO , TSUKADA MASAO
IPC分类号： G01R31/02
摘要： PURPOSE:To discover easily and surely the disconnected point of the internal conductor of one phase among three-phase AC circuits in which the neutral point is grounded by detecting the change in the voltage phase between the power source side and load side of the disconnected point by a field sensor from the outside of an insulation covering. CONSTITUTION:The neutral point 1N of a three-phase AC power source 1 is grounded and when the S phase is disconnected, the voltage vector Ex appearing at the S phase terminal 2S of load 2 or the point 3B on the disconnected load side has 1/2 size and the phase different by 180 deg. with respect to the voltage vector Es of the S phase terminal 1S of the power source. If the voltage phase of the R phase which is a defectless phase is used as a reference, the S phase voltage is in the phase delayed by 120 deg. at the point 3A on the disconnected power source side and changes to the phase advanced by 60 deg. at the point 3B. A field sensor consisting of an electrooptical crystal such as LiNbO3 is provided to the outside of the insulation covering of the defectless phase R and the disconnected phase S and the moment of the zero voltage detected by both sensors when the sensor of the S phase is moved is compared. A phase difference is thus decided and the disconnected place is determined.

3. 发明专利

JPS5112147A 失效
公开(公告)号：JPS5112147A
公开(公告)日：1976-01-30
申请号：JP8391574
申请日：1974-07-22
申请人： FUJI ELECTRIC CO LTD
发明人： ISAKI KENICHI , IIJIMA TERUAKI , SASAKI TADASHI , OOHASHI KAZUHIRO
IPC分类号： G01C22/00 , G01D5/12 , G08C15/00 , G08C15/06 , H04J3/08 , H04Q9/00

4. 发明专利

JPS60139137A MONITOR CONTROL SYSTEM FOR LINE SWITCHING DEVICE 失效
公开(公告)号：JPS60139137A
公开(公告)日：1985-07-23
申请号：JP24370083
申请日：1983-12-26
申请人： FUJI ELECTRIC CO LTD , FUJI FACOM SEIGIYO
发明人： SUZUKI ISAMU , OOHASHI KAZUHIRO
IPC分类号： H02J13/00

5. 发明专利

JPS58209236A SIGNAL EXTRACTING SYSTEM 失效
公开(公告)号：JPS58209236A
公开(公告)日：1983-12-06
申请号：JP9229682
申请日：1982-05-31
申请人： FUJI ELECTRIC CO LTD , FUJI FACOM SEIGIYO
发明人： OOHASHI KAZUHIRO , TSUKADA MASAO
IPC分类号： H04B3/56
摘要： PURPOSE:To extract a signal superimposed on a distribution line or the like based on a voltage induced in a coil, by providing the coil contactlessly with a core wire of the distribution line or the like at a location subject to the effect of a magnetic ield produced around the distribution line. CONSTITUTION:The magnetic field H at a distance (r) to the coil 6 is expressed as H=I/2pir [AT/m]. The total magnetic flux phi is expressed as Equation 1, where B=muH [wb/m ] is magnetic flux density and (a) is radius of the coil 6 in [m]. Further, a voltage E induced in the coil 6 is expressed in Equation 2, where N is the number of windings of the coil 6. The induced voltage E is in- creased with the coil 6 wound on a ferromagnetic substance 7. Since the relation of E0/E=f0/f is established, where f[Hz] is commercial frequency, f0[Hz] is signal frequency, and E[V], E0[V] are output voltages at respective magnetic field, a signal superimosed is detected on the basis of the induced voltage of the coil 6.

6. 发明专利

JPS586197B2 失效
公开(公告)号：JPS586197B2
公开(公告)日：1983-02-03
申请号：JP8186074
申请日：1974-07-17
申请人： FUJI ELECTRIC CO LTD
发明人： IZAKI KENICHI , IIJIMA TERUAKI , SASAKI TAKASHI , OOHASHI KAZUHIRO
IPC分类号： H04J3/08 , G01D5/12 , G08C15/00 , G08C15/06 , H04Q9/00

7. 发明专利

JPS5135354A TANMATSUKIKI NO SENTAKUSOCHI 失效
公开(公告)号：JPS5135354A
公开(公告)日：1976-03-25
申请号：JP10856774
申请日：1974-09-20
申请人： FUJI ELECTRIC CO LTD
发明人： SASAKI TADASHI , OOHASHI KAZUHIRO
IPC分类号： H04L5/22 , G11B7/125 , G11B7/128 , H04Q9/14

8. 发明专利

JPH0681422B2 失效
公开(公告)号：JPH0681422B2
公开(公告)日：1994-10-12
申请号：JP31777687
申请日：1987-12-16
申请人： FUJI ELECTRIC CO LTD
发明人： KANAZAWA YASUHISA , OOHASHI KAZUHIRO
IPC分类号： H02J3/00

9. 发明专利

JPS60139117A GROUND INSULATION LEVEL DETECTING SYSTEM FOR LOW VOLTAGE FACILITY 失效
公开(公告)号：JPS60139117A
公开(公告)日：1985-07-23
申请号：JP24374583
申请日：1983-12-26
申请人： FUJI ELECTRIC CO LTD
发明人： OOHASHI KAZUHIRO , KANEDA MOTOSHIROU
IPC分类号： H02H3/16

10. 发明专利

JPS60109336A SIGNAL COUPLING DEVICE 失效
公开(公告)号：JPS60109336A
公开(公告)日：1985-06-14
申请号：JP21606583
申请日：1983-11-18
申请人： FUJI ELECTRIC CO LTD , FUJI FACOM SEIGIYO
发明人： TSUKADA MASAO , KANEDA MOTOSHIROU , OOHASHI KAZUHIRO
IPC分类号： H04B3/56
摘要： PURPOSE:To reduce greatly both the ground leakage current and the fault current by connecting a coupling accumulator between a high voltage distribution line and the ground when necessary. CONSTITUTION:A signal coupling device 2A contains a coupling accumulator 5, an impedance 5, a high-frequency signal detector 6 which serves as a means that detects the high-frequency signal flowing to a high voltage distribution line 1 with insulation from this line and transmits the detected signal to a data transmitter 3A, and a switch means which turns on and off the accumulator 4. The transmitter 3A is provided with a reception circuit 8 which supplies the detection signal sent from the detector 6, a transmission circuit 9 which has its output terminal connected to both ends of the impedance 5 so as to transmit a prescribed data signal to the line 1, and an application circuit 10 for the means 7. A control circuit 11 decodes the detection signal given from the detector 6 by the reception signal sent from the circuit 8 and controls the open/close of the means 7.

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