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1. 发明专利

JPH09168229A CURRENT DIFFERENTIAL RELAY AND READY BIT SIGNAL TRANSMISSION METHOD THEREFOR 失效
公开(公告)号：JPH09168229A
公开(公告)日：1997-06-24
申请号：JP32321995
申请日：1995-12-12
申请人： HITACHI LTD
发明人： KOMATSU SHINJI , WACHI ISAO , NORO JUN , TAKIGUCHI YUTAKA , SEYA MINORU , OSUMI TAKASHI
IPC分类号： H02H3/28
摘要： PROBLEM TO BE SOLVED: To obtain a current differential relay in which abnormality on a transmission line or a bus can be transmitted surely to the counterpart end by employing an alternately variable ready bit signal indicative of the normal function of a first current differential relay. SOLUTION: A ready bit edition circuit comprises an edition circuit 1 for patterning the transmission ready bit, and an edition circuit 2 for receiving ready bit. When the ready signal at its own end is normal, a signal 5 goes '1' and a flip-flop 6 is set with '0' if the previous output value 4A obtained through a delay circuit 4 is '1' otherwise set with '1'. A flip-flop output 3 is then transmitted, as a transmission ready signal, to the counterpart end. In this regard, the delay circuit 4 is synchronized with the transmission period and when the ready signal 5 is normal, the transmission ready signal has an alternating pattern of '1', '0', '1', '0',....

2. 发明专利

JP2003204622A BUS-BAR PROTECTOR 审中-公开
公开(公告)号：JP2003204622A
公开(公告)日：2003-07-18
申请号：JP2002002077
申请日：2002-01-09
申请人： HITACHI LTD
发明人： OSUMI TAKASHI , NORO JUN , KUME AYATO , KIKUCHI TAKASHI
IPC分类号： H02B13/065 , H02H3/28
摘要： PROBLEM TO BE SOLVED: To provide a bus-bar protector which can readily identify a bus-bar on which a failure occurs, even if the number of terminals of auxiliary switches, by which open/close signals of disconnectors are obtained, is reduced. SOLUTION: Respective contacts 2A-2C of auxiliary switches of respective disconnectors 2a-2c are used concurrently for both a circuit 1 and a circuit 2. Two disconnector condition input circuits 16a and 16b are connected to each other with jumper wires 10a-10c. With such a constitution, even if respective one terminal cannot be alotted to each of the disconnectors 2a-2c of one circuit, the terminals corresponding to two lines can be connected to a terminal block 13. A decision circuit 17, which decides whether the open/close signals inputted from respective connection lines 14a-14c and 15a-15c are signals for the circuit 1 or the signals for the circuit 2, is provided, and whether a bus-bar having a failure is bus-bar A 1a or a bus-bar B 1b is decided by the decision circuit 17. COPYRIGHT: (C)2003,JPO

3. 发明专利

JP2002051451A DIGITAL PROTECTIVE RELAY DEVICE 失效
公开(公告)号：JP2002051451A
公开(公告)日：2002-02-15
申请号：JP2000238881
申请日：2000-08-02
申请人： HITACHI LTD , CHUBU ELECTRIC POWER
发明人： NORO JUN , ITO MASAHIRO , ABE TAKAHISA
IPC分类号： H02H3/36
摘要： PROBLEM TO BE SOLVED: To provide a digital protective relay which can cope with all system failures. SOLUTION: A ground current differential relay 14 has a ratio difference calculating unit for processing a zero-phase circulation current i3 and a ratio calculating unit for processing only a ground current i4 and can cope with all system failures.

4. 发明专利

JPH09327118A METHOD AND APPARATUS FOR LOCATING START 失效
公开(公告)号：JPH09327118A
公开(公告)日：1997-12-16
申请号：JP14305596
申请日：1996-06-05
申请人： HITACHI LTD
发明人： KOMATSU SHINJI , WACHI ISAO , NORO JUN , TAKIGUCHI YUTAKA
IPC分类号： H02H3/36 , H02H3/38 , H02H3/40
摘要： PROBLEM TO BE SOLVED: To obtain a method and an apparatus by which whether an accident is caused or not can be judged on the basis of the detection current of only a line, to be detected, by a method wherein the current of the line, to be detected, which is connected to a non-power-supply end is detected and a locating-start command is output when the detected current exceeds a settling value. SOLUTION: When current detectors 10, 16 are installed at a non-power- supply end 90, a signal at '1' is output from a setting-signal generator 34, the output of a logic gate 28 is changed forcibly to '0', and only the detection current of the current detector 10 is input to a control circuit 36 via an adder 22. Then, when a short circuit accident is generated in a transmission line 80, only the detection current of the current detector 10 is monitored, and, when the detection current exceeds a settling value, a start command is output to a fault locator. Thereby, whether an accident is generated or not can be judged on the basis of the detection current of only a line to be detected.

5. 发明专利

JPH0923564A DISPLAY FOR HISTORY OF PROTECTIVE RELAY 失效
公开(公告)号：JPH0923564A
公开(公告)日：1997-01-21
申请号：JP17201395
申请日：1995-07-07
申请人： HITACHI LTD
发明人： KOMATSU SHINJI , NORO JUN , SUZUKI YASUTAKA
IPC分类号： H02H3/02
摘要： PROBLEM TO BE SOLVED: To provide a highly reliable protective relay converting the setting operation contents of operation conditions into codes, and storing them, and reading out these stored codes, and converting them reversely, and indicating them as the history data of setting operation. SOLUTION: CPU 240 reads out the history of setting operation stored in RAM270, in order. In the case of having inputted the setting conditions from the touch panel type display of a protective relay 100, the setting conditions are transferred once from a storage circuit 175 to the RAM270. The read-out codes are converted into the operation keys corresponding to the key codes by CPU240. This conversion is performed by converting the code allocation reversely, and the converted operation keys are indicated on a flat display 22 through interface 255 for display. Hereby, even after setting, the contents of the setting operation can be checked afresh, so the reliability on setting operation can be improved.

6. 发明专利

JP2001086636A AUTOMATIC INSPECTION DEVICE AND PROTECTIVE RELAY 失效
公开(公告)号：JP2001086636A
公开(公告)日：2001-03-30
申请号：JP25660899
申请日：1999-09-10
申请人： HITACHI LTD
发明人： WACHI ISAO , KUMAGAI KAZUAKI , KOMATSU SHINJI , NORO JUN
IPC分类号： H02H3/05 , H02H7/26
摘要： PROBLEM TO BE SOLVED: To inspect only one trip command output means even if an inspection command is outputted to a plurality of trip command output means at a duplicate period of time. SOLUTION: When inspection by a main detection unit 10 starts, a signal '1' is outputted from a main detection inspection start circuit 18, and the signal resets a failure detection inspection start circuit 36 and a timer 42 of the failure detection unit 12. After the output signal of the main detection inspection circuit 18 is delayed by a timer 24 by (t) hours provided that a reset signal is not inputted from the failure detection unit 12, the output signal is inputted into an OR gate 28. The signal '1' is outputted to relay contacts MX1-MXn at an AND gate 30 provided that a main detection inspection lock signal at '1' level is not inputted from the failure detection unit 12, thereby inspecting the relay contacts MX1-MXn automatically.

7. 发明专利

JPH10160780A METHOD AND DEVICE FOR STARTING FAULT POINT LOCATION 失效
公开(公告)号：JPH10160780A
公开(公告)日：1998-06-19
申请号：JP31731896
申请日：1996-11-28
申请人： HITACHI LTD
发明人： KOMATSU SHINJI , NORO JUN , WACHI ISAO , TAKIGUCHI YUTAKA , SEYA MINORU
IPC分类号： G01R31/08 , H02H3/00 , H02H3/10 , H02H3/40
摘要： PROBLEM TO BE SOLVED: To provide a method and device for starting fault point location that can start locating by detecting only the fault of a target transmission line of fault point location. SOLUTION: When a grounding accident occurs at the phase (a) of a transmission line 10, a signal '1' is outputted from a control circuit 22 if a phase current exceeds a set value and the signal is outputted to an AND gate 70 via an OR gate 42. Further, when the impedance of the phase (a) enters the range of a set value, a signal '1' is outputted from a grounding relay 44 and the signal is outputted to the AND gate 70 via OR gates 58 and 68, thus outputting a signal '1' from the AND gate 70 and starting locating.

8. 发明专利

JPH09191553A DIGITAL PROTECTIVE RELAY DEVICE 失效
公开(公告)号：JPH09191553A
公开(公告)日：1997-07-22
申请号：JP131996
申请日：1996-01-09
申请人： HITACHI LTD
发明人： WACHI ISAO , KOMATSU SHINJI , NORO JUN , TAKIGUCHI YUTAKA , SEYA MINORU , OSUMI TAKASHI
IPC分类号： H02H3/02 , H02H3/05
摘要： PROBLEM TO BE SOLVED: To surely manage software on individual boards by a method wherein a specific board inside a protective relay device is selected, a software program storage means inside the selected board is selected and an information content is displayed. SOLUTION: In a device, when a ROM information output request is issued to a CPU board 502 from a switch part 504 or a portable man-machine interface 529, the CPU board 502 issues a ROM information output request to respective CPU boards 516, 522. Then, the respective CPU boards 516, 522 which receive the ROM information output request output respective ROM sum values in ROM's inside their own boards to the CPU board 502 via a bus 515 and, they output information to a display part 503 or the the portable man-machine interface 529 in a format so as to be displayed together with a ROM sum value 301 in a ROM 513 on the board 502. As a result, since information on software inside the own device can be confirmed in an on-line manner, the software can be confirmed surely.

9. 发明专利

JPH08314753A DEVICE AND METHOD FOR PROGRAM DEBUGGING 失效
公开(公告)号：JPH08314753A
公开(公告)日：1996-11-29
申请号：JP11588195
申请日：1995-05-15
申请人： HITACHI LTD
发明人： OGAWA EIJI , SUZUKI YASUTAKA , NORO JUN
IPC分类号： G06F11/28 , G06F11/32 , G06F11/34 , G06F15/16 , G06F15/167 , G06F15/177
摘要： PURPOSE: To provide a device and a method for program debugging capable of executing debug by specifying clearly a state when a CPU in which an error has occurred stops and a program stopping position when an error has occurred in each CPU. CONSTITUTION: This device comprises an exceptional stack frame generating means 11 which generates a stack frame to perform the exceptional processing of an error, an exceptional stack frame judging means 131 which judges the format of a generated exceptional stack frame, an exceptional stack data transfer means 151 which transfers exceptional stack data to a memory area corresponding to the format in the common memory area of each CPU based on a judged format, an error flag judging means 132 which judges the error flag of the CPU, an error information transfer means 152 which transfers error information to a specific memory area in the common memory area based on the above judgement, and an error information processing means 17 which displays transferred error information and executes the debug.

10. 发明专利

JP2006014400A Differential current monitor 审中-公开
标题翻译：差分电流监视器
公开(公告)号：JP2006014400A
公开(公告)日：2006-01-12
申请号：JP2004183987
申请日：2004-06-22
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： HYODO KAZUYUKI , NORO JUN , KIKUCHI TAKASHI
IPC分类号： H02H7/045
摘要： PROBLEM TO BE SOLVED: To provide a differential current monitor in which a differential current monitoring logic is standardized by substantially eliminating the need for setting a timer at each site.
SOLUTION: The differential current monitor comprises: a differential current detection circuit 1 for comparing a current flowing into a power facility apparatus with a current flowing out therefrom, and detecting the differential current of unbalance component corresponding to a fault current at the time of tripping a circuit breaker by outputting a trip signal upon occurrence of fault in the apparatus; and a differential current monitoring timer 4 for locking output of the trip signal until the differential current of unbalance component sustains for a predetermined time or longer. The monitor is further provided with: a circuit 2 for detecting the second harmonic from a current signal; and a gate circuit 3 for stopping output from the differential current detection circuit 1 to the differential current monitoring timer 4 when the detected second harmonic is not lower than a predetermined level.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种差分电流监视器，其中通过基本上消除在每个位置设置定时器的需要来对差分电流监视逻辑进行标准化。差动电流监视器包括：差动电流检测电路1，用于将流入电力设备装置的电流与从其流出的电流进行比较;以及检测与此时的故障电流对应的不平衡成分的差动电流通过在设备中发生故障时输出跳闸信号来跳闸断路器; 以及用于锁定跳闸信号的输出的差动电流监视定时器4，直到不平衡部件的差动电流保持预定时间或更长时间。该监视器还设有：用于从当前信号检测二次谐波的电路2; 以及门电路3，用于当所检测到的二次谐波不低于预定电平时，将差分电流检测电路1的输出停止到差动电流监视定时器4。版权所有（C）2006，JPO＆NCIPI

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