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11. 发明专利

JPS5892871A TESTING METHOD FOR INSULATION OF TRANSFORMER 失效
公开(公告)号：JPS5892871A
公开(公告)日：1983-06-02
申请号：JP10601482
申请日：1982-06-17
申请人： MITSUBISHI ELECTRIC CORP
发明人： HIRAI MASAYOSHI , TAMAOKI EIICHI , ISHII KOUICHI
IPC分类号： G01R31/12 , G01R31/06
摘要： PURPOSE:To test the insulation of a transformer accurately without requiring any large scale installation, by covering the high voltage terminal of the transformer to be tested with an insulator. CONSTITUTION:The high voltage terminal part 4 of a transformer 1 to be tested is covered with a case 6 filled with an insulating oil 7 and the case 6 is connected to the housing of the transformer 1 and is thereby grounded. Since the part 4 is insulated with the oil 7, no large bushings as compared to air bushings are required and since there is virtually no partial electric discharge generated through the parts except the body of the transformer 1, the accurate testing of insulation is made possible.

12. 发明专利

JPS57184211A MANUFACTURE OF INSULATION PARTS 失效
公开(公告)号：JPS57184211A
公开(公告)日：1982-11-12
申请号：JP6961181
申请日：1981-05-08
申请人： MITSUBISHI ELECTRIC CORP
发明人： ADACHI YASUHEI , HIRAI MASAYOSHI , TAMAOKI EIICHI , TOBA YASUO , ISHIKAWA KIYOYUKI , AIDA TSUNETO
IPC分类号： H01F27/32 , H01B19/00 , H01F41/10 , H01F41/12
摘要： PURPOSE:To make a metal mold unnecessary by manufacturing insulation parts while wrapping creep paper around the mold. CONSTITUTION:A creep paper 2 is wrapped around the external face of a mold 1 having a predetermined shape (the figure shows the insulation parts in the manufacturing process.) to form it in a desired shape and dimension, thereafter adhesive is hardened, the insulation parts are separated from the mold 1 and the product is made through cutting and shaping of the end thereof. The adhesive can be used for adhesion at a normal temperature and adhesion through heating and thermal hardening adhesive can also be coated previously. The material quality for the mold 1 covers all solid material such as water, metal, plastic paper or the like for example.

13. 发明专利

JPS57180108A BUSHING 失效
公开(公告)号：JPS57180108A
公开(公告)日：1982-11-06
申请号：JP6607481
申请日：1981-04-29
申请人： MITSUBISHI ELECTRIC CORP
发明人： HARA KEIJI , HIRAI MASAYOSHI
IPC分类号： H01F27/04
摘要： PURPOSE:To obtain a secure connection in an equipment in which a hollow connection lead drawn out of a machine and a connection part of a bushing are screened by a field relief member by a method wherein a connection conductor which can be slid is drawn out of the field relief member. CONSTITUTION:A coil 2 housed in a tank 1 of a machine such as a transformer is connected to a bottom terminal 5 of a bushing 4 via a connection lead 3. The bushing 4 is fitted to a flange of the tank 1. A fixed side 10 of a slip-in contact and a connection conductor 12 which can be moved and coupled to the axis direction are provided to the tip of the lead 3. The conductor 12 is composed of a rod part 12a which can be moved to the axis direction sliding with the fixed side 10 and a coupling part 12b which can be coupled with a moving side 11 of the slip-in contact. When the connection work is performed, the coupling part 12b is drawn out of a field screen 8 and an insulation barrier 9, so that the connection work can be performed securely by observing the moving side 11 and the coupling part 12b through a connection man-hole 13 provided to the tank 1.

14. 发明专利

JPS5679411A STATIONARY INDUCTION APPARATUS 失效
公开(公告)号：JPS5679411A
公开(公告)日：1981-06-30
申请号：JP15651079
申请日：1979-11-30
申请人： MITSUBISHI ELECTRIC CORP
发明人： HIRAI MASAYOSHI , TAMAOKI EIICHI , KOUAN TOYOICHI
IPC分类号： H01F27/02
摘要： PURPOSE:To change substantial dimensions of a case to transport dimensions by a method wherein a plurality of unit cases constitute the case in which the stationary induction apparatus such as a transformer is housed, the outer periphery of one case is coincided with the inner periphery of the other case which is connected and a welding is applied to the coincided part to make the cases one body. CONSTITUTION:The case in which a transformer iron core 3 wound with a winding 4 is formed of a plurality of unit cases 11 and 12 or a plurality of the unit cases further divided into many numbers of the unit cases. When these unit cases are assembled, a flange plane 11a provided at the top of the one unit case 11 on its outer periphery is kept fit with the unit case 12 adjacent thereto on its inner periphery, and flange plane 11a is applied a welding with those ends remaining overlapped. Thus, the respective unit cases are fitted on the outer periphery and inner periphery and welded to be made the cases with the predetermined height. In such a way, the substantial dimension of the case can be made the transport dimension and with the same transport dimension, the apparatus capacity can be enlarged.

15. 发明专利

JPS54140928A PRESSURE RELEASER FOR TRANSFORMER 失效
公开(公告)号：JPS54140928A
公开(公告)日：1979-11-01
申请号：JP5033978
申请日：1978-04-26
申请人： MITSUBISHI ELECTRIC CORP
发明人： KAWANAKA SUSUMU , FUJIWARA TOSHIHIKO , HIRAI MASAYOSHI , TAKECHI MORIAKI , MORITSU KAZUKI
IPC分类号： H01F27/02
摘要： PURPOSE:To prevent the wrong operation of a pressure releaser and raise the reliability, by providing a pressure release plate at a halfway part of a pressure release pipe connected to a transformer so that the pressure release plate is broken by abnormal pressure to release it and by making the effective diameter of the plate larger than the inside diameter of the pressure release pipe. CONSTITUTION:The diameter of the flange 2b' and flanged end of the pressue release pipe 1b' is increased. The large-diameter flange 7b of a connection pipe 7 having a small-diameter part 71, a large-diameter part 72 and the flanges 7a, 7b is tightened with a packing 6 on the flange 2b' of the pressure release pipe by bolts. The pressure release plate 4 whose effective diameter D is larger than the inside diameter d of the pressure release pipe 1a is fitted together with packings 5a, 5b in a recess of the flange 7b. If the pressure in the transformer rises due to a trouble or the like, the pressure release plate 4 is broken at a prescribed pressure. Because the vibration of insulating oil due to an external cause such as an earthquake is absorbed by the deflection of the elastic plate 4, the occurrence of pressure in the pressure release pipe 1a is prevented. The wroung operation of the pressure releaser is thus eliminated.

16. 发明专利

JPS5310021A ELECTRIC MACHINE AND APPARATUS 失效
公开(公告)号：JPS5310021A
公开(公告)日：1978-01-30
申请号：JP8414576
申请日：1976-07-14
申请人： MITSUBISHI ELECTRIC CORP
发明人： HIRAI MASAYOSHI , HAKATA TETSUO
IPC分类号： H01F27/12
摘要： PURPOSE:To do each part circulating oil in suitable amount and at the same time to prevent static electricity, by preparing reverse direction of oil sending in a part of coolers, when coolers composed of cooler body and circulating pump are provided in a plurality number and electric machine and apparatus are cooled.

17. 发明专利

JPS51145841A RELAY SYSTEM FOR PROTECTING TRANSFORMERS 失效
公开(公告)号：JPS51145841A
公开(公告)日：1976-12-15
申请号：JP7055775
申请日：1975-06-10
申请人： MITSUBISHI ELECTRIC CORP
发明人： HATADA MINORU , HIRAI MASAYOSHI , TAMAOKI EIICHI
IPC分类号： H02H7/045 , H02H7/04
摘要： PURPOSE:A protective relay system whereby faults can be detected quickly with high sensitvity in a transformer enclosing plural number of coils connected in parallel, as well as in an autotrnsformer.

18. 发明专利

JPH0150086B2 失效
公开(公告)号：JPH0150086B2
公开(公告)日：1989-10-27
申请号：JP6960181
申请日：1981-05-08
申请人： MITSUBISHI ELECTRIC CORP
发明人： HARA KEIJI , HIRAI MASAYOSHI
IPC分类号： H01R4/58 , H01F27/04

19. 发明专利

JPS6318322B2 失效
公开(公告)号：JPS6318322B2
公开(公告)日：1988-04-18
申请号：JP15651079
申请日：1979-11-30
申请人： MITSUBISHI ELECTRIC CORP
发明人： HIRAI MASAYOSHI , TAMAOKI EIICHI , KOAN TOYOICHI
IPC分类号： H01F27/02

20. 发明专利

JPS6315731B2 失效
公开(公告)号：JPS6315731B2
公开(公告)日：1988-04-06
申请号：JP6715681
申请日：1981-04-30
申请人： MITSUBISHI ELECTRIC CORP
发明人： TOBA YASUO , ISHIKAWA KYOYUKI , HIRAI MASAYOSHI , TAMAOKI EIICHI
IPC分类号： H01F5/04 , H01F27/28 , H01F41/10

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