Journal of the A.I.E.E.最新文献_第9页

Abridgment of essential factors in the coordination of line, station and apparatus insulation 删减线路、车站和设备绝缘协调中的必要因素

Journal of the A.I.E.E. Pub Date : 1930-08-01 DOI: 10.1109/JAIEE.1930.6535393

A. Silver, H. Melvin

{"title":"Abridgment of essential factors in the coordination of line, station and apparatus insulation","authors":"A. Silver, H. Melvin","doi":"10.1109/JAIEE.1930.6535393","DOIUrl":"https://doi.org/10.1109/JAIEE.1930.6535393","url":null,"abstract":"Consideration of generated voltages and switching surges might logically be taken as the basis for determining the minimum amounts of insulation required for lines and stations. Lightning, when it is encountered, affects service primarily through its influence on lines. The lightning insulation strengths which may be suitable for the lines may bear little or no relation to the operating voltage or the basic insulation strengths found satisfactory at the stations. In order that service will be affected a minimum by the excessive lightning voltages which may be propagated to, or originate at the stations, it is desirable that they be discharged external to the station and Us apparatus. To accomplish this four lightning insulation levels are proposed; the basic or lowest level (determined by consideration of generated and switching surge voltages) being established by the line insulation or spillway gaps at the line entrances; the buses and connections constituting the next higher level; apparatus bushings next; and finally the apparatus internals. More complete data on the nature of transient voltages and the performance of insulation with these voltages applied, are required before insulation can be coordinated with assurance. During the interim period however it should be possible to accomplish substantial improvement to service by applying to specific cases as they arise, the knowledge and data already available and being gathered. Since the entire project is distinctly in the development and research stage, the authors believe more progress should be accomplished before recognized standardization can be undertaken to advantage of such features as test waves, characteristics of insulation and insulation levels for lines, stations and apparatus.","PeriodicalId":260406,"journal":{"name":"Journal of the A.I.E.E.","volume":"79 20","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1930-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131874256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The National Hydraulic laboratory 国家水利实验室

Journal of the A.I.E.E. Pub Date : 1930-07-04 DOI: 10.1126/science.72.1853.7

引用次数: 0

Abridgment of directional ground relays 定向接地继电器的缩短

Journal of the A.I.E.E. Pub Date : 1930-07-01 DOI: 10.1109/JAIEE.1930.6538618

E. E. George, R. H. Bennett

引用次数: 0

Abridgment of the transmission characteristics of open-wire telephone lines 开放式电话线传输特性的简化

Journal of the A.I.E.E. Pub Date : 1930-07-01 DOI: 10.1109/JAIEE.1930.6538620

E. I. Green

引用次数: 0

Buried distribution type transformers 埋地配电变压器

Journal of the A.I.E.E. Pub Date : 1930-07-01 DOI: 10.1109/JAIEE.1930.6538608

C. Schwenger

引用次数: 0

Abridgment of standards of insulation and protection for transformers 变压器绝缘和保护标准简编

Journal of the A.I.E.E. Pub Date : 1930-07-01 DOI: 10.1109/JAIEE.1930.6538621

J. A. Johnson, E. S. Bundy

{"title":"Abridgment of standards of insulation and protection for transformers","authors":"J. A. Johnson, E. S. Bundy","doi":"10.1109/JAIEE.1930.6538621","DOIUrl":"https://doi.org/10.1109/JAIEE.1930.6538621","url":null,"abstract":"This paper presents the reasons and evidence which have influenced the authors to favor the proposed recommendations on relation of transformer insulation to adjacent line insulation set forth in a companion paper by Messrs. Montsinger and Dann. The paper first outlines the principal considerations which govern the determination of transmission line insulation on one hand, and transformer insulation on the other. It concludes that the line insulation is a service problem requiring a unique solution whereas the transformer insulation is a manufacturing problem requiring a standardized solution. True coordination of one with the other therefore seems impossible, indicating the need for protective measures at the point of contact. Considerations affecting the selection and characteristics of such protective measures are discussed briefly, and the reasons outlined for believing that at present service experience is a better criterion than research tests upon which to decide such selection. Twenty-five years' service experience on the system now controlled by the Buffalo, Niagara and Eastern Power Corporation, with protective gaps similar to those recommended as one of the proposed protective measures, is described, and conclusion drawn that the use of such gaps under suitable conditions constitutes a satisfactory protective measure.","PeriodicalId":260406,"journal":{"name":"Journal of the A.I.E.E.","volume":"41 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1930-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120982359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Abridgment of dancing conductors 舞蹈指挥家的缩写

Journal of the A.I.E.E. Pub Date : 1930-07-01 DOI: 10.1109/JAIEE.1930.6538613

A. Davison

{"title":"Abridgment of dancing conductors","authors":"A. Davison","doi":"10.1109/JAIEE.1930.6538613","DOIUrl":"https://doi.org/10.1109/JAIEE.1930.6538613","url":null,"abstract":"The phenomenon of dancing cables is discussed; the merits of different theories are considered, reference being made to the theory that vibrations of small amplitude but relatively high frequency travel along the line to points where the constants of the line change, as at dead-ending insulators, and there reflect and combine into slower waves of great amplitude. The suggestion is made that much experimental work should be done with regard to these theories before drawing any definite conclusions. Reference is made to Magnus Effect and to the “lift” of ice-coated cables in wind storms. This lift, perpendicular to the direction of the wind, is carefully considered, and diagrams show experimental values of this lift on models similar to the ice-coated cables. The diagrams indicate variations and reversals of this thrust due to small changes of angle of the specimen to the direction of the wind. The suggestion is made that these alternate lifting and depressing effects should be considered as the cause of some, if not a large percentage, of the phenomenal movements of ice-coated conductors in relatively light winds. As in most earlier reports and discussions there does not seem to be any remedy as a result of this study, other than the heating of the conductor electrically to such a temperature throughout sleet-forming periods that the sleet cannot form on the wires.","PeriodicalId":260406,"journal":{"name":"Journal of the A.I.E.E.","volume":"135 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1930-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134003866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Abridgment of the 220,000-volt system of the hydo-electric power commission of Ontario 安大略水电委员会22万伏特系统的删节

Journal of the A.I.E.E. Pub Date : 1930-07-01 DOI: 10.1109/JAIEE.1930.6538617

E. Brandon

引用次数: 0

Abridgment of reduction of eddy current losses by the inverted turn transposition and the twisted lead transposition 通过反匝换位和绞引线换位来减少涡流损耗

Journal of the A.I.E.E. Pub Date : 1930-07-01 DOI: 10.1109/JAIEE.1930.6538615

J. Lyons

引用次数: 1

The status of the young engineer: President's address 年轻工程师的现状:总统的讲话

Journal of the A.I.E.E. Pub Date : 1930-07-01 DOI: 10.1109/JAIEE.1930.6538611

Harold B. Smith

引用次数: 0