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1. 发明专利

JPH11102628A SWITCH OPERATION MECHANISM 失效
公开(公告)号：JPH11102628A
公开(公告)日：1999-04-13
申请号：JP26181897
申请日：1997-09-26
申请人： MITSUBISHI ELECTRIC CORP , TOKYO ELECTRIC POWER CO
发明人： TAKAHASHI MASAYUKI , SAKAI MICHIO , HORIKOSHI TOSHIO , YOTSUMOTO ZENJI
IPC分类号： H01H3/42 , H01H31/28 , H01H33/42
摘要： PROBLEM TO BE SOLVED: To provide a switch operation mechanism capable of differentiating the stroke between a closing position and an opening position from the stroke between the opening position and a grounding position with a simple structure. SOLUTION: This switch operation mechanism is equipped with a moving contact 4 movable to a closing position, an opening position and a grounding position, a crank 2 having a first and second handle insertion holes 2c, 2d, an operating handle 5 which is inserted into the second handle insertion hole 2d so as to move the moving contact 4 between the closing position and the opening position and is inserted into the first handle insertion hole 2c so as to move the moving contact 4 between the opening position and the grounding position, and transmission mechanisms 3, 9, 13 that transmit the rotational movement of the crank 2 to the moving contact 4, and in its front plate 1c, also has a first operation window 12a that restricts the rotational movement of the operation handle 5 within its upper and lower ends corresponding to the first handle insertion hole and a second operation window 12b that has a length less than that of the first operation window 12a and restricts the rotational movement of the operation handle 5 within its upper and lower ends.

2. 发明专利

JPH11191905A SWITCH GEAR 失效
公开(公告)号：JPH11191905A
公开(公告)日：1999-07-13
申请号：JP20513298
申请日：1998-07-21
申请人： MITSUBISHI ELECTRIC CORP , TOKYO ELECTRIC POWER CO
发明人： TAKAHASHI MASAYUKI , MARUYAMA TOSHIMASA , YAMANAKA TAKEAKI , SHINOHARA NORIFUMI , YOTSUMOTO ZENJI
IPC分类号： H02B13/02 , H01H33/66
摘要： PROBLEM TO BE SOLVED: To provide a small-sized switch gear. SOLUTION: A switch gear includes an almost angular box-shaped tank 27, a vacuum valve 31 in the tank 27 for breaking the continuity, a dynamic power mechanism 13 put outside the tank 27 for storing and discharging the operating energy for driving the vacuum valve 31, and an operating mechanism 12 with a dynamic power transmission mechanism 14 for transmitting the dynamic power mechanism 13 to the vacuum valve 31. The tank 27 has an inwardly recessed step part 27a in its corner, on which the operation mechanism 12 is mounted.

3. 发明专利

JP2001110286A EVACUATION ELEMENT FOR VACUUM INSULATING SWITCH 失效
公开(公告)号：JP2001110286A
公开(公告)日：2001-04-20
申请号：JP28657099
申请日：1999-10-07
申请人： HITACHI LTD , TOKYO ELECTRIC POWER CO
发明人： TSUJI MASASHIGE , MORITA AYUMI , TANIMIZU TORU , KOJIMA KATSUNORI , ISHIKAWA YUICHI , YOTSUMOTO ZENJI
IPC分类号： H01J41/16 , H01H33/66 , H01H33/668
摘要： PROBLEM TO BE SOLVED: To provide an evacuation element for a vacuum insulating switch, allowing the smaller size of the vacuum insulating switch and an evacuation device and offering high safety in maintenance and inspection. SOLUTION: A vacuum container 2 and a power supply circuit 34 are grounded E to always make potential zero, whereby an evacuation element 30 requires normal insulation withstanding voltage instead of insulation withstanding voltage in consideration of high voltage. Therefore, the evacuation element 30 is made smaller as well as a worker is kept safe if contacting the vacuum container 2 and the evacuation element 30 in maintenance and inspection.

4. 发明专利

JPH09259709A FALLING-OFF PREVENTION STRUCTURE OF CLOSING CIRCUIT LID OF THREE-PHASE MOLD TYPE DISCONNECTOR AND THE LIKE 失效
公开(公告)号：JPH09259709A
公开(公告)日：1997-10-03
申请号：JP8598396
申请日：1996-03-15
申请人： SANEISHA SEISAKUSHO KK , TOKYO ELECTRIC POWER CO
发明人： TOMITA MINORU , NISHIO MINORU , HORIKOSHI TOSHIO , YOTSUMOTO ZENJI
IPC分类号： H01H31/02
摘要： PROBLEM TO BE SOLVED: To engage a closing circuit lid or a grounding tool with a three phase mold type disconnector collectively by one member, and further allow no falling- off of the closing circuit lid or the grounding tool even in the case of explosion or the like resulting from short-circuit current passing or the like. SOLUTION: In a disconnector a closing circuit lid 2b containing a moving electrode is capped on two fixed electrode 2a confronting fixed to a fitting base 1 so as to close a circuit. Guide bodies 3 are provided on both sides of a three-phase mold type disconnector 2 from the fitting base 1, both leg portions of a lock cover 4 are fitted to the tips of the guide bodies 3 so as to be free in turning, first step portion and second step portion are provided on the one side edge of the stopper plate of the lock cover 4, and when a closing circuit lid 2b is capped on the fixed electrodes 2a and the guide bodies 3 are turned, the first step portion is engaged with a tool engaging portion 2c positioning at the top of the closing circuit lid 2b. When the closing circuit lid 2b is detached, a grounding tool is fitted to one side fixed electrode 2a and the guide bodies 3 are turned, the second step portion is engaged with the tool engaging portion of the outer end portion of the grounding tool.

5. 发明专利

JPH11220830A METHOD FOR IDENTIFYING FAULT POINT ON POWER CABLE 失效
公开(公告)号：JPH11220830A
公开(公告)日：1999-08-10
申请号：JP3549198
申请日：1998-02-02
申请人： TOKYO ELECTRIC POWER CO , MITSUBISHI CABLE IND LTD
发明人： YOTSUMOTO ZENJI , ISONO SHIGEKI , KAWASAKI KATSUTOSHI
IPC分类号： G01R31/08 , H02H3/00
摘要： PROBLEM TO BE SOLVED: To identify a fault point accurately by correcting the delay of discharge occurring times caused by the crest value of injected pulses. SOLUTION: Low-level pulses and high-level ones are each injected from a pulse generating device 11 to cause discharges to occur at a fault point X on a fault-phase cable 12. Also, the same pulses of these two kinds are each injected into a sound-phase cable 13. These four reflected wave forms in total are stored in a waveform memory 16. In a waveform processing device 17, the differences of each reflected waveform of the fault-phase cable 12 and sound-phase cable 13, in the case where the low-level and high-level pulses are injected, are obtained to extract discharge waveforms. Then, the differences in discharge occurring times caused by the low-level and high-level pulses are obtained to correct the position of the fault point X based on the pulse potential delays corresponding these differences.

6. 发明专利

JPH11218555A FAULT SECTION LOCATING METHOD FOR POWER CABLE 失效
公开(公告)号：JPH11218555A
公开(公告)日：1999-08-10
申请号：JP3549298
申请日：1998-02-02
申请人： TOKYO ELECTRIC POWER CO , MITSUBISHI CABLE IND LTD
发明人： YOTSUMOTO ZENJI , KAWASAKI KATSUTOSHI , ISONO SHIGEKI
IPC分类号： G01R31/08
摘要： PROBLEM TO BE SOLVED: To accurately locate a fault section of a power cable by using a locating pulse. SOLUTION: The outputs of a high-voltage pulse generator and a low-voltage pulse generator 12, both of which generate pulses for discharge for causing discharge at a faulty section X, are alternately connected in a switchable state to the conductor of a fault-phase cable 13 having the fault section X through a coupling circuit 14 and a lead wire 15 and a waveform processor 18 composed of a waveform storing device 17 and a computer is connected to the lead wire 15 through a transformer 16. Firstly, the high-voltage pulse generator 11 is connected to the cable 13 and the pulse for discharge is injected. While the ground-fault resistance is still low after the discharging waveform is damped, a steeply rising low-voltage locating pulse is injected from the low-voltage pulse generator 12. The waveform processor 18 locates the distance to the fault section X from the returning time of the reflected waveform of the locating pulse.

7. 发明专利

JPH11113114A BELLOWS AND COMPOSITE INSULATED SWITCHGEAR USING THIS BELLOWS 失效
公开(公告)号：JPH11113114A
公开(公告)日：1999-04-23
申请号：JP26538197
申请日：1997-09-30
申请人： HITACHI LTD , TOKYO ELECTRIC POWER CO , KUZE BELLOWS KOGYOSHO LTD
发明人： MORITA AYUMI , TANIMIZU TORU , HORIKOSHI TOSHIO , YOTSUMOTO ZENJI , HASHIMOTO TAKANORI
IPC分类号： H02B13/02 , H01H31/00 , H01H33/66 , H01H33/662
摘要： PROBLEM TO BE SOLVED: To lighten stress concentration at both ends of a bellows, and to prolong its life without increasing the size of the bellows, by making the spring constant of the central part in the direction of expansion and contraction of the bellows, smaller than those of both end parts in the direction of expansion and contraction. SOLUTION: A movable lever 35 is provided penetrating an end plate (sidewall) 3 and is formed so as to sway with a main shaft 18 being outside a container serving as a fulcrum. And a bellows 6 bridging the sidewall 3 and the movable lever 35 is provided at the penetrating part of the movable lever to seal the inside of the container from the outside. Namely, one end of the bellows 6 is fixed to the movable lever 35, and the other end is fixed to the sidewall 3. Here, the height H2 of the mountain of the bellows 6 at the central part in the direction of expansion and contraction of the bellows 6 is larger than that H1 of its mountain at its end part in the direction of expansion and contraction. In other words, the spring constant of the central part in the direction of expansion and contraction is made smaller than those of the end parts in the direction of expansion and contraction. Accordingly, the central part of the bellows 6 has a softer construction compared to the end parts, and the stress at the end parts of the bellows 6 scatters to the central part, and it becomes possible to lighten stress concentration at both ends.

8. 发明专利

JPH0993729A DOOR LOCK OF ELECTRIC EQUIPMENT ENCLOSURE 失效
公开(公告)号：JPH0993729A
公开(公告)日：1997-04-04
申请号：JP24645595
申请日：1995-09-25
申请人： TOKYO ELECTRIC POWER CO , NGK INSULATORS LTD , ENERGY SUPPORT CORP
发明人： YOKOYAMA TOMOHIRO , YOTSUMOTO ZENJI , MATSUMOTO JUNICHI , UMEDA CHIKANOBU
IPC分类号： H02B1/38 , H02B1/28
摘要： PROBLEM TO BE SOLVED: To smoothly and quickly open the door of the main body case of an electric equipment enclosure after the pressure in the box is relieved. SOLUTION: A supporting body 19 is fixed to one internal side face of a main body case 1 and a through hole 19a is formed at the front end of the body 19. A sliding bar 20 is loosely passed through the hole 19a and a bracket 5 formed in a rectangular block is provided at the front end of the bar 20. A long hole 5a is formed at the center of the bracket 5 and a lock pin 4 is loosely inserted into the hole 5a. Double nuts 22 are engaged with the rear end of the bar 20 through a washer 21 and a compression spring 23 is put between the washer 21 and supporting body 19 in a state where the bar 20 passes through the spring 23. When the pressure in the case 1 suddenly rises owing to a short-circuiting accident, etc., and an opening/closing door 2 starts to open, the lock pin 4 is press-contacted with the bracket 5 against the pressure of the spring. Therefore, the press-contacting force of the pin 4 applied to the bracket 5 is relieved.

9. 发明专利

JP2000201409A SWITCHGEAR 失效
公开(公告)号：JP2000201409A
公开(公告)日：2000-07-18
申请号：JP30796799
申请日：1999-10-29
申请人： HITACHI LTD , TOKYO ELECTRIC POWER CO
发明人： TAZAWA MAKOTO , TANIMIZU TORU , WATANABE TAKAYASU , MURATA KOICHI , YOTSUMOTO ZENJI
IPC分类号： H02B13/02 , H01H33/66
摘要： PROBLEM TO BE SOLVED: To provide an insulated switchgear which can be installed to the shoulder of a road or the rooftop of a building, by constituting the switchgear in such a way that an operating mechanism is arranged on the rear side of a protective relay device arranged in the upper section of the switchgear and, at the same time, the relay device can be pulled out of a casing when the device is rotated around its fulcrum. SOLUTION: An operating mechanism 4 which collectively operates vacuum valves in three phases is arranged on the backside above an insulated switchgear 3 and a protective relay device 6 is arranged above a bus-side conductor 5 in front of the mechanism 4. On the backside of the relay device 6, in addition, a manual button which opens and closes the switchgear 3 is provided. When an accident happens, the relay device 6 is operated and controls the operating mechanism 4 so that any one of cutting-off operation, disconnecting operation, and grounding operation may be carried out automatically in accordance with a command from a controller 7. The relay device 6 is rotatably supported at its one end so that the device 6 may be pulled out of a casing when the device is rotated around the supporting section 14. Therefore, the switchgear 3 can be installed to the shoulder of a road or the rooftop of a building.

10. 发明专利

JP2000003648A BELLOWS 失效
公开(公告)号：JP2000003648A
公开(公告)日：2000-01-07
申请号：JP16501998
申请日：1998-06-12
申请人： HITACHI LTD , TOKYO ELECTRIC POWER CO , KUZE BELLOWS KOGYOSHO CO LTD
发明人： MORITA AYUMI , TANIMIZU TORU , HORIKOSHI TOSHIO , YOTSUMOTO ZENJI , HASHIMOTO TAKANORI
IPC分类号： H01H33/66
摘要： PROBLEM TO BE SOLVED: To provide a bellows capable of relaxing stress concentration arising in its end part on the side of a container wall of an apparatus without enlarging the frame of the bellows, and improving a service life. SOLUTION: In a bellows 4 having an end part fixed to a movable lever 2 put through a container wall 1 and making rocking motion, and the other end fixed to the container wall 1, the spring constant of the end part of the bellows 4 fixed to the container 1 is adapted to be larger than the other portions. To set up such a spring constant, the height H of crests on the end part of the bellows 4 on the container wall side is adapted smaller than the height of crests on the other portions.

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