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1. 发明专利

JPH0614447A FAULT SELECTIVE DEVICE CAPABLE OF DECIDING BREAKDOWN 失效
公开(公告)号：JPH0614447A
公开(公告)日：1994-01-21
申请号：JP16889092
申请日：1992-06-26
申请人： HIGASHI NIPPON RYOKAKU TETSUDO , RAILWAY TECHNICAL RES INST , EIRAKU DENKI KK
发明人： INOUE HAJIME , ITO TOSHIKATSU , FUKAWA YUJI , ITO TAKESHI
IPC分类号： B60M3/00 , H02H3/087 , H02H3/44
摘要： PURPOSE:To prevent unnecessary breaking overlapping at a substation side by deciding upon a breakdown when a failure current is detected, and deciding the fact when a car itself cuts off. CONSTITUTION:When a failure current is detected by a primary detecting section 21, positive or zero or negative of a gradient of the failure current is monitored by a secondary detecting section 22 within a minute time. Decision is made on whether the failure is already in another process such as a breaking in a car, and when it is in the process, the car itself is so controlled that a breaking signal 4 is not outputted. At that time, a minute time T from a primary detection point to a secondary detection point is the function of a current increasing gradient (di/dt) at the primary detection point, T=K1+K2/(di/dt)1, (where K1 and K2 are the constant specified in advance). According to the constitution, unnecessary breaking overlapping at a substation side can be prevented.

2. 发明专利

JPH07177654A GROUND FAULT DETECTION SYSTEM FOR DC FEEDER CIRCUIT 失效
公开(公告)号：JPH07177654A
公开(公告)日：1995-07-14
申请号：JP31818193
申请日：1993-12-17
申请人： RAILWAY TECHNICAL RES INST , EIRAKU DENKI KK
发明人： ABE SATOSHI , ITO TOSHIKATSU , AGUI KOJI , HASE SHINICHI , ITO TAKESHI
IPC分类号： H02H7/26 , B60M3/00
摘要： PURPOSE:To provide a system for detecting and locating such ground fault as the part applied with DC feeder voltage, e.g. feeder line or trolley line, in the feeder circuit of DC electric railway touches a conductive structure, e.g. a beam, for supporting the part while insulating electrically. CONSTITUTION:A resistor and a diode 8L are connected in series between a conductive structure 4, e.g. a beam, and an interconnecting line 10L having one end connected with a rail 6 through a series connection of a terminal resistor 111L and a diode 12L. The diode 8L has forward direction directing from the metal body 4, e.g. the beam, toward the interconnecting line 10L whereas the diode 12L has forward direction directing from the end of interconnecting line toward the rail 6. A section 100 detects ground fault based on the voltage across the resistor 11L and locates the fault point.

3. 发明专利

JPH05172892A FAULT LOCATION SYSTEM ON DC PARALLEL FEEDER CIRCUIT OF ELECTRIC RAILWAY 失效
公开(公告)号：JPH05172892A
公开(公告)日：1993-07-13
申请号：JP35590191
申请日：1991-12-20
申请人： RAILWAY TECHNICAL RES INST , EIRAKU DENKI KK
发明人： ITO TOSHIKATSU , ITO TAKESHI
IPC分类号： G01R31/08
摘要： PURPOSE:To calculate the position of a fault point in a feeder circuit from the feeder fault electric cerrent data group which is taken at the substations on both the sides of the electricity feeder in a fault section, when a short-circuit fault is generated in the dc parallel feeder circuit of an electric railway. CONSTITUTION:Fault electric current collecting devices 6A and 6B which detect and memorize the electric current data before and after the fault detection time point, monitoring the variation of the feeder circuit electric current value at the outlet of a substation are installed at substations A and B, and the data in the time band corresponding to the fault phenomenon is extracted from among the fault electric current data group sent from each substation, and the max. electric current value of the fault electric current is estimation-calculated, and the partial charge ratio in each substation is calculated from the estimated increase portion electric current value of the fault electric current, and the distance to a trouble point is calculated by a fault point calculating device 9 on the basis of the distance D between both substations. Accordingly, the fault point can be located independently of the existence of a train, difference of the voltage and capacity of the substation, and the difference of trouble state.

4. 发明专利

JPH0582101B2 失效
公开(公告)号：JPH0582101B2
公开(公告)日：1993-11-17
申请号：JP19440383
申请日：1983-10-19
申请人： RAILWAY TECHNICAL RES INST
发明人： ITO TAKESHI , TSUCHIKURA KOICHI , FUKADA NARYUKI
IPC分类号： H04L12/437 , H04L12/42

5. 发明专利

JPH0254983B2 失效
公开(公告)号：JPH0254983B2
公开(公告)日：1990-11-26
申请号：JP19924783
申请日：1983-10-26
申请人： RAILWAY TECHNICAL RES INST
发明人： ITO TAKESHI , TSUCHIKURA KOICHI , FUKADA NARYUKI
IPC分类号： H04Q9/00 , H04L12/437

6. 发明专利

JP2541722B2 失效
公开(公告)号：JP2541722B2
公开(公告)日：1996-10-09
申请号：JP35590191
申请日：1991-12-20
申请人： TETSUDO SOGO GIJUTSU KENKYUSHO , EIRAKU DENKI KK
发明人： ITO TOSHIKATSU , ITO TAKESHI
IPC分类号： G01R31/08

7. 发明专利

JPH0644019B2 失效
公开(公告)号：JPH0644019B2
公开(公告)日：1994-06-08
申请号：JP28428685
申请日：1985-12-19
申请人： EIRAKU DENKI KK
发明人： ITO TAKESHI
IPC分类号： G01R21/133 , G01R21/00

8. 发明专利

JPS62169061A THREE-PHASE ELECTRIC POWER MEASURING INSTRUMENT 失效
公开(公告)号：JPS62169061A
公开(公告)日：1987-07-25
申请号：JP1022186
申请日：1986-01-22
申请人： EIRAKU DENKI KK , SHOWA DENSHI KOGYO KK
发明人： ITO TAKESHI , KAMIGAKI SATORU
IPC分类号： G01R21/133
摘要： PURPOSE:To obtain a correct measured value even when an incorrect connection is present by comparing the phase sequences of voltage and current inputted to a three-phase power measuring instrument with each other and inverting the data of either one. CONSTITUTION:The voltage and current data inputted to a three-phase power measuring instrument 10 are inputted to an actual input current register 15 and an actual input voltage register 14 via an A/D converter 13. Voltage phase sequence discriminating means 16 discriminates the phase sequence of input voltage and current phase sequence discriminating means 17 discriminates the phase sequence of input current. Phase sequence comparing means 18 compares the voltage phase sequence and the current phase sequence with each other and, when both the phase sequences agree with each other, the data in the registers 14 and 15 are inputted to power calculating means 20 as they are. On the other hand, in the case of disagreement, the polarity of the output data of the register 15 is inverted by a correcting current register 19 to be inputted to arithmetic means 20. The result of a power calculation in the arithmetic means 20 is fed to a display 22 via absolute value calculating means 21.

9. 发明专利

JPS61196712A FAULT-POINT LOCATION FOR ELECTRIC RAILWAY FEEDING CIRCUIT 失效
公开(公告)号：JPS61196712A
公开(公告)日：1986-08-30
申请号：JP3370185
申请日：1985-02-23
申请人： EIRAKU DENKI KK
发明人： ITO TAKESHI , FUKAWA YUJI
IPC分类号： H02H3/00 , G01R31/00 , G01R31/08

10. 发明专利

JP2587889B2 失效
公开(公告)号：JP2587889B2
公开(公告)日：1997-03-05
申请号：JP16889092
申请日：1992-06-26
申请人： HIGASHINIPPON RYOKAKU TETSUDO KK , TETSUDO SOGO GIJUTSU KENKYUSHO , EIRAKU DENKI KK
发明人： INOE HAJIME , ITO TOSHIKATSU , FUKAWA JUJI , ITO TAKESHI
IPC分类号： B60M3/00 , H02H3/087 , H02H3/44

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