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1. 发明专利

JPH07122159A LOCKING DEVICE FOR DISCONNECTOR 失效
公开(公告)号：JPH07122159A
公开(公告)日：1995-05-12
申请号：JP26445893
申请日：1993-10-22
申请人： MEIDENSHA ELECTRIC MFG CO LTD
发明人： TAKI IZUMI , UCHIDA KAZUHIRO
IPC分类号： H01H31/04
摘要： PURPOSE:To provide a locking device for disconnector with a simple structure which can safely perform the maintenance and inspection of a switch including a disconnector. CONSTITUTION:A pushbutton switch 20 is pushed when a safe condition where a disconnector is opened and an earthing device is closed is established, whereby a coil 19 is excited, a piston 19a is pulled out from the hole 14b of a shutter 14, and a cylinder lock 9 is released to pull out a locking handle 7, whereby a locking plate 3 is rotated. The manual handle insert hole 25 of the disconnector is blocked by the locking plate 3 to lay the disconnector in the locked state. A clutch lever 17 is also rotated through the shutter 13 to release the connection of the operating shaft of the disconnector to a motor.

2. 发明专利

JPH0414726A OPERATIONAL DEVICE FOR ELECTRIC POWER APPARATUS 失效
公开(公告)号：JPH0414726A
公开(公告)日：1992-01-20
申请号：JP11708290
申请日：1990-05-07
申请人： MEIDENSHA ELECTRIC MFG CO LTD
发明人： UEMATSU HIROBUMI , TAKI IZUMI
IPC分类号： H01H3/30 , H01H33/40
摘要： PURPOSE:To prevent a lever for electrode operation from moving to improve safety until a lever for operational spring attachement reaches a dead point of contraction of the operational spring by separating a lever for contracting a spring, a lever for operational spring attachment, and an operational cam to compose an operational apparatus. CONSTITUTION:When a driving nut 2 is move rightward by rotating a motor in an on-condition (a), a claw part 32 of a lever 3 for contracting a spring is joined with a joining end 41 of a lever 4 for operational spring attachment at a contraction starting position (b) to rotate the lever 4 for operational spring attachement contraclockwise, and the lever for operational spring attachement comes to the dead point (d) passing the middle point of contraction (c) and thus contraction of the operational spring 5 is completed. At that time, an operational seal shaft does not rotate from the contraction starting point to the dead point and consequently a movable contact 9 does not move until the leer 4 for operational spring attachment rotates and comes to the dead point. When the lever passes the dead point, the operational spring 5 in a state of being contracted is released at once and thus the operational spring becomes is released state (e) at once.

3. 发明专利

JPH0377225A SWITCH OPERATING DEVICE 失效
公开(公告)号：JPH0377225A
公开(公告)日：1991-04-02
申请号：JP21186189
申请日：1989-08-17
申请人： MEIDENSHA ELECTRIC MFG CO LTD
发明人： UEMATSU HIROBUMI , TAKI IZUMI
IPC分类号： H01H3/26 , H01H33/36
摘要： PURPOSE:To perform speed adjustment with respect to closing and tripping with a single speed adjuster by a method wherein positional relation between orifice holes of a cylinder and a rotating cylinder is changed by rotation of the rotating cylinder. CONSTITUTION:This device 2 incorporates a speed adjuster 21 wherein the adjuster 21 comprises an outer cylinder 24, a cylinder 25 having orifice holes a1, a2 in a lower part and a rotating cylinder 26 fitted to the outer of the cylinder 25 freely rotatably and having orifice holes b1, b2. The holes a1, b1 completely communicate with each other at a dead point, slightly overlap during tripping and do not communicate at a tripping completion position. The holes a2, b2 completely communicate with each other during closing and largely overlap at a closing completion position. Thus excessive energy is removed from operation energy at the time of closing and tripping.

4. 发明专利

JPH0260013A BUFFER TYPE GAS CIRCUIT BREAKER 失效
公开(公告)号：JPH0260013A
公开(公告)日：1990-02-28
申请号：JP20985188
申请日：1988-08-24
申请人： MEIDENSHA ELECTRIC MFG CO LTD
发明人： UEMATSU HIROBUMI , TAKI IZUMI
IPC分类号： H01H33/70 , H01H33/91
摘要： PURPOSE:To shut off current in a short time by providing plural flow straightening fins for partitioning a gas discharge passage in circumferential direction with the fins held inclined to a movable arcing contact. CONSTITUTION:When a driving rod 8 is moved to the right to shut off current, a fixed piston 17 compresses an insulating gas in a buffer chamber 9, and the insulating gas is pushed out from plural discharging holes 20 into a discharge passage 12. The gas is then blown against an arc 19 generated between fixed arcing contacts 4 and 7. At that time, the insulating gas discharged from each of the discharging holes 20 into the discharge passage 12 does not interfere with the gas discharged from adjacent discharging hole 20 due to the presence of flow straightening fins 21. Thus, the insulating gas flows through the discharge passage 12 in a laminar flow condition without energy loss, and after flowing between the flow straightening fins, the gas generates eddy flows and is blown against the arc 19. The arc 19 is throttled to reduce its diameter and distinguished.

5. 发明专利

JPH08171838A CONTROL CIRCUIT OF SWITCHGEAR 失效
公开(公告)号：JPH08171838A
公开(公告)日：1996-07-02
申请号：JP31612494
申请日：1994-12-20
申请人： MEIDENSHA ELECTRIC MFG CO LTD
发明人： UCHIDA KAZUHIRO , TAKI IZUMI
IPC分类号： H01H33/59
摘要： PURPOSE: To provide a control circuit of a switchgear in which a limit switch can be adjusted easily and of which the cost is lowered and of which the reliability is improved. CONSTITUTION: A limit switch having a switching contact point is used as limit switches LS1, LS2 for a close circuit and an open circuit. The switching contact point sides of both limit switches LS1, LS2 as a common connection is connected with a terminal N. Both the contact point sides of both limit switches LS1, LS2 are connected with a manual handle chain coil 89LK to form an exciting circuit. The b contact point side of the limit switch LS1 for closing circuit and the b contact point side of the limit switch LS2 for opening circuit are connected with an exciting circuit of an electromagnetic relay 89C for closing circuit and with an exciting circuit of an electromagnetic relay 89D for opening circuit, respectively. An interlock circuit and self-retaining circuit are installed in the exciting circuit of each electromagnetic relay by using relay contact points. Consequently, the limit switches for the motor control and the manual handle chain can be used in common and the adjustment of the switches can be done easily.

6. 发明专利

JPH0377226A SWITCH OPERATING DEVICE 失效
公开(公告)号：JPH0377226A
公开(公告)日：1991-04-02
申请号：JP21186289
申请日：1989-08-17
申请人： MEIDENSHA ELECTRIC MFG CO LTD
发明人： UEMATSU HIROBUMI , TAKI IZUMI
IPC分类号： H01H3/26 , H01H33/36
摘要： PURPOSE:To perform speed adjustment with respect to closing and tripping with a single speed adjuster by a method wherein positional relation between orifice holes of a cylinder and a reciprocating cylinder is changed by movement of the reciprocating cylinder. CONSTITUTION:Orifice holes a1, b1 provided on a cylinder 24 completely overlap at dead point, and as regards orifice holes a2, b2, the hole b2 is slightly toward closing direction of a reciprocating cylinder 25 with respect to the hole a2. Thus the holes a1, b1 completely communicate T with each other at dead point, they slightly overlap T'' during tripping and there are no communicating holes at tripping completion position. The holes a2, b2 completely communicate C'1 with each other during closing and largely overlap C'2 at closing completion position. Thus excessive energy is removed from operation energy at the time of closing and tripping.

7. 发明专利

JPH02100217A BUFFER-TYPE GAS CIRCUIT BREAKER 失效
公开(公告)号：JPH02100217A
公开(公告)日：1990-04-12
申请号：JP25251288
申请日：1988-10-06
申请人： MEIDENSHA ELECTRIC MFG CO LTD
发明人： UEMATSU HIROBUMI , TAKI IZUMI
IPC分类号： H01H33/91
摘要： PURPOSE:To improve arc-extinguishing performance by a method wherein a heat gas chamber is formed between a driving rod and a buffer chamber and the hot gas chamber is opened close to the tip of a movable arcing contact. CONSTITUTION:A heat gas chamber 21 is provided between a buffer chamber 9 and a movable arcing contact 7. When a gas circuit is to be cut, by separating the movable arcing contact from a fixed arcing contact 3, pressure of insulation gas rapidly rises due to arc heat generated between poles to permit gas to gather in the heat gas chamber 21, and arc is extinguished with the insulation gas blown against the arc from an opening 23. Then, insulation gas in the buffer chamber 9 pushed out by a piston 17 rapidly raises insulation recovery characteristics between the poles to complete cutting the gas circuit. The larger the cutoff current, the larger the arc energy, to increase pressure of the insulation gas in the heat gas chamber to have arc-extinguishing performance improved.

8. 发明专利

JPH0227630A BUFFER TYPE GAS CIRCUIT BREAKER 失效
公开(公告)号：JPH0227630A
公开(公告)日：1990-01-30
申请号：JP17873388
申请日：1988-07-18
申请人： MEIDENSHA ELECTRIC MFG CO LTD
发明人： UEMATSU HIROBUMI , TAKI IZUMI
IPC分类号： H01H33/91
摘要： PURPOSE:To improve breaking performance by providing a plurality of partition walls one end of which is fixed between discharge holes adjacent to each other in a buffer cylinder and the other end extended toward the forward end of a movable arcing contact to separate a discharge passage. CONSTITUTION:A plurality of partition walls 21 of which one end is fixed between discharge holes 20 adjacent to each other in a buffer cylinder and the other extended toward the forward end of a movable arcing contact 7 to separate a discharge passage 12 are provided around the movable arcing contact 7. By thus providing the partition walls 21 in the discharge passage 12, insulating gas is discharged from a buffer chamber 9 through the discharge holes 20 to the discharge passage 12 without mutual interference between insulating gas desiccated from the discharge holes 20 adjacent to each other. Flows of insulating gas, therefore, become like layers of currents or similar currents, and flow quantity is increased because flow efficiency is improved. Breaking performance can thus be improved.

9. 发明专利

JPH01313826A BUFFER TYPE GAS-BLAST CIRCUIT-BREAKER 失效
公开(公告)号：JPH01313826A
公开(公告)日：1989-12-19
申请号：JP14447788
申请日：1988-06-10
申请人： MEIDENSHA ELECTRIC MFG CO LTD
发明人： TAKASHIMA TAMOTSU , TAKI IZUMI
IPC分类号： H01H33/91
摘要： PURPOSE:To increase the breaking capacity by providing on a flow passage a hot gas chamber and a check valve being a flow path introducing insulation gas into a buffer chamber, thereby covering the outer periphery of a movable arcing contact and the tip end thereof. CONSTITUTION:A hot gas chamber 27 for introducing insulation gas in a hollow part 5 of a drive rod 8 into a buffer chamber 9 is provided and a check valve 29 flowing insulation gas to only the chamber 9 from the chamber 27 is provided at a piston 17, then the outer peripheral face and end face of a movable arcing contact 7 is covered with an insulation member 30. The insulation gas rapidly high pressurized with arc energy is introduced to the chamber 9 through a heat gas chamber 27, and it is sprayed to arc at a high speed. It is thus possible to perform breaking with a short arc time and to improve arc eliminating performance since the arc energy increases as the breaking current increases to highly pressurize the insulation gas.

10. 发明专利

JPH01309227A BUFFER TYPE GAS-BLASTED CIRCUIT BREAKER 失效
公开(公告)号：JPH01309227A
公开(公告)日：1989-12-13
申请号：JP13904488
申请日：1988-06-06
申请人： MEIDENSHA ELECTRIC MFG CO LTD
发明人： TAKASHIMA TAMOTSU , TAKI IZUMI
IPC分类号： H01H33/915
摘要： PURPOSE:To make it possible to cut off securely the current even though it is a large current by providing a partition wall with linking holes to a buffer chamber and making the movable arcing contact side in the buffer chamber as a thermal gas chamber. CONSTITUTION:While a partition wall 20 to partition a buffer chamber 9 is provided, linking holes 22 and 24 are formed at the partition wall 20, and the movable arcing contact 7 side of the buffer chamber 9 is used as a thermal gas chamber 21. When the current is cut off, the movable arcing contact 7 is removed from a fixed arcing contact 4, and thereby, the pressure of the insulating gas in the thermal gas chamber 21 is raised by the heat of the arc generated between electrodes, the insulating gas is sprayed to the arc, and the arc is distinguished. After that, the insulating gas in the buffer chamber 9 pushed out by a piston 17 raises the insulation restoration property between electrodes suddenly, and the cutting-off is completed. As a result, the larger the breaking current, the larger the arc energy, and the pressure of the insulating gas in the thermal gas chamber 21 is also increased to increase the arc extinguish capability.

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