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1. 发明专利

JPS6322549B2 失效
公开(公告)号：JPS6322549B2
公开(公告)日：1988-05-12
申请号：JP3010882
申请日：1982-02-24
申请人： MITSUBISHI ELECTRIC CORP
发明人： MYAKE YASUAKI , KOTANI GENZABURO , ISAHAYA KEIJI , NOZAWA TERUO , MATSUZAKI TADASHI , SAKAI YUKITOSHI
IPC分类号： G01R25/00 , H02H3/38

2. 发明专利

JPS54101143A PROTECTIVE RELAY 失效
公开(公告)号：JPS54101143A
公开(公告)日：1979-08-09
申请号：JP793678
申请日：1978-01-26
申请人： MITSUBISHI ELECTRIC CORP
发明人： HONMA AKIYOSHI , SAKAI YUKITOSHI
IPC分类号： H02H3/46 , H02H3/00
摘要： PURPOSE:To permit quick detection of a change of the frequency of the system at the time of occurrence of such a change so as to detect a trouble causing such a change for permitting a measure for stabilizing the system to be taken. CONSTITUTION:A frequency change is detected by sampling the voltage of the systems N time each for one period of the fundamental frequency, converting the sampled values into N digital values and determining whether the value obtained by successively adding the N sampled values is zero or not. When a frequency change is detected, th system is determined to be in trouble, and a measure for stabilizing the system is taken up.

3. 发明专利

JPH0510015B2 失效
公开(公告)号：JPH0510015B2
公开(公告)日：1993-02-08
申请号：JP18339583
申请日：1983-09-29
申请人： MITSUBISHI ELECTRIC CORP
发明人： SAKAI YUKITOSHI , USUI MASAJI , ANZAI TOSHIO
IPC分类号： H02H3/34

4. 发明专利

JPS6074923A ONE-LINE GROUND-FAULT VOLTAGE DETECTING RELAY 失效
公开(公告)号：JPS6074923A
公开(公告)日：1985-04-27
申请号：JP18339583
申请日：1983-09-29
申请人： MITSUBISHI ELECTRIC CORP
发明人： SAKAI YUKITOSHI , USUI MASAJI , ANZAI TOSHIO
IPC分类号： H02H3/34

5. 发明专利

JPS5592515A DEVICE FOR PREVENTING ERRONEOUS OPERATION OF PROTECTION RELAY 失效
公开(公告)号：JPS5592515A
公开(公告)日：1980-07-14
申请号：JP16161478
申请日：1978-12-29
申请人： MITSUBISHI ELECTRIC CORP
发明人： HATSUTORI TOSHIKI , YOSHIDA TAKASHI , NOZAWA TERUO , SAKAI YUKITOSHI
IPC分类号： H02H3/05 , H02H3/02

6. 发明专利

JPS60183929A PROTECTIVE RELAY SYSTEM 失效
公开(公告)号：JPS60183929A
公开(公告)日：1985-09-19
申请号：JP3805684
申请日：1984-02-28
申请人： CHUBU ELECTRIC POWER , MITSUBISHI ELECTRIC CORP
发明人： SUGIYAMA TSUTOMU , SUGIURA TOKUHIRO , SAKAI YUKITOSHI , KAMIKUBO YASUHIRO , NARITA TOSHIHARU
IPC分类号： H02H3/48

7. 发明专利

JPS58146864A PHASE DETECTING DEVICE 失效
公开(公告)号：JPS58146864A
公开(公告)日：1983-09-01
申请号：JP3010882
申请日：1982-02-24
申请人： MITSUBISHI ELECTRIC CORP
发明人： MIYAKE YASUAKI , KOTANI GENZABUROU , ISAHAYA KEIJI , NOZAWA TERUO , MATSUZAKI TADASHI , SAKAI YUKITOSHI
IPC分类号： G01R25/00 , H02H3/38
摘要： PURPOSE:To detect phase with high reliability by adding a simple circuit, by providing a waveform detecting circuit for monitoring that an input electric quantity of a phase detecting circuit in a protective relaying device, etc. is continued for a specified polarity period. CONSTITUTION:When a period of normal square wave signals e1, e2 is denoted as T0, an operating time t3 of waveform detecting circuits 9, 10 is set to t3= T0/4+alpha (alpha is an allowable minimum value). Therefore, at the time of an external fault in the back near point, disorder of a waveform is generated in a continuous period of the square wave signal e2, by influence of transient phenomena of filters 3a, 3b. The waveform detecting circuit 9 detects by an NOR circuit 9c the case (a) when the square wave signal e2 changes to ''0'' from ''1'' while a time limit operating circuit 9b is counting by an output e9a of a differentiating circuit 9a, and generates an output e9. That is to say, the waveform detecting circuit 9 detects disorder of a waveform, by which a continuous period of fixed polarity of an input electric quantity becomes below t3. When outputs e9, e10 of one of these waveform detecting circuits 9, 10 are obtained, an output (ei) of a coinciding circuit 8a is locked by an inhibiting circuit 11, and a malfunction of a phase detecting circuit 8 is prevented.

8. 发明专利

JPH031890B2 失效
公开(公告)号：JPH031890B2
公开(公告)日：1991-01-11
申请号：JP3771584
申请日：1984-02-28
申请人： MITSUBISHI ELECTRIC CORP
发明人： SAKAI YUKITOSHI , MAEDA KOJI , ONO AKIRA
IPC分类号： H02H3/48

9. 发明专利

JPS60183931A PROTECTIVE RELAY SYSTEM 失效
公开(公告)号：JPS60183931A
公开(公告)日：1985-09-19
申请号：JP3805884
申请日：1984-02-28
申请人： CHUBU ELECTRIC POWER , MITSUBISHI ELECTRIC CORP
发明人： SUGIURA TOKUHIRO , SUZUKI KUNIO , SAKAI YUKITOSHI , KAMIKUBO YASUHIRO , MAEDA KOUJI
IPC分类号： H02H3/48

10. 发明专利

JPS60180425A PROTECTION RELAY SYSTEM 失效
公开(公告)号：JPS60180425A
公开(公告)日：1985-09-14
申请号：JP3771484
申请日：1984-02-28
申请人： MITSUBISHI ELECTRIC CORP
发明人： KAMIKUBO YASUHIRO , HONMA AKIYOSHI , SAKAI YUKITOSHI
IPC分类号： H02H3/48

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