专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JP2004361293A Deterioration diagnostic method of power cable 有权
公开(公告)号：JP2004361293A
公开(公告)日：2004-12-24
申请号：JP2003161269
申请日：2003-06-05
申请人： Furukawa Electric Co Ltd:The , Tokyo Electric Power Co Inc:The , 古河電気工業株式会社 , 東京電力株式会社
发明人： YAGI YUKIHIRO , ISHII NOBORU , TSUJIMOTO TOMIYUKI , NAKADE MASAHIKO
IPC分类号： G01R31/12 , G01R31/00
摘要： PROBLEM TO BE SOLVED: To provide the deterioration diagnostic method of a power cable for remarkably reducing labor and a cost accompanying deterioration diagnosis by dispensing with unsealing and sealing working of a closed opening and closing device when performing deterioration diagnosis of the power cable.
SOLUTION: In the deterioration diagnostic method of the power cable 10, a terminal 12 of the power cable 10 and a mechanism ground 24 connected to it are provided in the inside of an outside casing 16 of the closed opening and closing device 14. The ground side of the mechanism ground 24 taken out to the outside in the state insulated electrically from the outside casing 16 is separated from ground potential 28, the ground side and a test voltage generation device 32 are connected to each other, test voltage is applied on a conductor of the power cable 10 through the mechanism ground 24, and the deterioration state of the power cable 10 is diagnosed by measuring a deterioration signal generated from the power cable 10.
COPYRIGHT: (C)2005,JPO&NCIPI

2. 发明专利

JP2004354093A Deterioration diagnostic method of power cable 有权
公开(公告)号：JP2004354093A
公开(公告)日：2004-12-16
申请号：JP2003149464
申请日：2003-05-27
申请人： Furukawa Electric Co Ltd:The , Tokyo Electric Power Co Inc:The , 古河電気工業株式会社 , 東京電力株式会社
发明人： YAGI YUKIHIRO , ISHII NOBORU , TSUJIMOTO TOMIYUKI , NAKADE MASAHIKO
IPC分类号： G01R31/12
摘要： PROBLEM TO BE SOLVED: To provide a deterioration diagnostic method of power cable, capable of performing a precise deterioration diagnosis of a power cable by deriving and removing a third harmonic component in a loss current which appears by the influence of a third harmonic voltage included in an AC voltage applied to the power cable.
SOLUTION: This deterioration diagnostic method of the power cable comprises applying the AC voltage to the power cable to extract the loss current from the current carried in an insulator, and performing the deterioration of diagnosis of the power cable by use of the third harmonic component included in the loss current. In this method, paying attention, as the AC voltage to be applied to the power cable, to a first voltage V1 having a main frequency f and a superposed voltage V3 in which a second voltage V2 having a frequency 3f three times the frequency f is superposed on the first voltage V1, a third harmonic component I
3n included in the loss current, which appears by the influence of the third harmonic voltage V
3n included in the first voltage V1, and a third harmonic component I
3m0 included in the loss current is corrected, whereby the deterioration diagnosis of the power cable is performed.
COPYRIGHT: (C)2005,JPO&NCIPI

3. 发明专利

JP2007046908A Insulation deterioration diagnostic method and insulation deterioration diagnostic system of power cable 审中-公开
标题翻译：电力电缆绝缘诊断诊断方法及绝缘诊断诊断系统
公开(公告)号：JP2007046908A
公开(公告)日：2007-02-22
申请号：JP2005228413
申请日：2005-08-05
申请人： Exsym Corp , Tokyo Electric Power Co Inc:The , 東京電力株式会社 , 株式会社エクシム
发明人： OTAKA IWAO , TSUJIMOTO TOMIYUKI , NAKADE MASAHIKO
IPC分类号： G01R31/12
摘要： PROBLEM TO BE SOLVED: To diagnose a deterioration in insulation of a cable having large thickness insulation, capable of easily applying the same, even in a narrow site.
SOLUTION: The insulation deterioration diagnostic system 100 diagnoses deteroration in the cable 20 under measurement by impressing voltages with a selector switch 140 upon their drop with the AC voltage held for a prescribed time, after raising to a prescribed value after the DC voltage has been impressed and grounded, and by measuring the remaining charges constrained in the insulator 22 with the short circuit switch 145 and detection circuit C
d , at AC voltage impression, with the remaining charge. A fixed time interval for impressing the AC voltage is set from the remaining charge value measured under the AC voltage impression satisfies the function that decays with a fixed time constant, and represents the error charges included in the remaining charges.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：为了诊断即使在狭窄的位置也能够容易地涂敷的绝缘厚度大的电缆的绝缘劣化。
解决方案：绝缘劣化诊断系统100通过在选择开关140的下降之后施加电压，在AC电压保持规定时间之后，在直流电压达到规定值之后，对测量中的电缆20进行诊断并且通过利用剩余电荷在AC电压印刷下用短路开关145和检测电路C SB测量在绝缘体22中约束的剩余电荷。 AC电压下测量的剩余电荷值满足以固定时间常数衰减的功能，并设定剩余电荷中包含的误差电荷的固定时间间隔。版权所有（C）2007，JPO＆INPIT

4. 发明专利

JP2011078284A Method for removing of cable 审中-公开
标题翻译：拆除电缆的方法
公开(公告)号：JP2011078284A
公开(公告)日：2011-04-14
申请号：JP2009230005
申请日：2009-10-01
申请人： Tokyo Electric Power Co Inc:The , 東京電力株式会社
发明人： KAIGA YUJI , KOYAMA YUGO , OKU HIROKI , YAMAGUCHI MASAFUMI , TSUJIMOTO TOMIYUKI
IPC分类号： H02G1/06
摘要： PROBLEM TO BE SOLVED: To provide a method for removing OF cable, capable of preventing generation of kinks or breaks, when pulling a spiral forming an oil passage and capable of reusing an existing conduit.
SOLUTION: The method is for removing a three-core OF cable 10 from the conduit, the OF cable includes three conductors 11 each of which is covered with insulating paper 12, a spiral 13 forms an oil passage 13A, and an interposing paper 14 interposed between the three conductors 11 covered with the insulating paper 12 and the spiral 13, and an anticorrosive layer 16 formed to cover them. The method, further, includes a process of passing a wire 20 through the spiral 13 first, winding the spiral 13 wound the wire 20, and drawing out the spiral 13 together with the wire 20.
COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供一种去除OF电缆的方法，其能够防止产生扭结或断裂，当拉动形成油路的螺旋并且能够重用现有导管时。解决方案：该方法是从导管中取出三芯OF电缆10，OF电缆包括三个导体11，每个导线11均用绝缘纸12覆盖，螺旋形13形成油通道13A，插入介于被绝缘纸12覆盖的三个导体11和螺旋13之间的纸张14和形成为覆盖它们的防腐层16。此外，该方法还包括首先使线20穿过螺旋状13的过程，缠绕缠绕线20的螺旋形13，以及将丝线13与线20一起拉出。（C）2011年， JPO＆INPIT

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式