DOI:10.1049/pi-1a.1950.0002

出版商:IEE    

年代:1950

数据来源: IET

摘要:

The paper is a brief review of the development of railway electrification in Great Britain excluding the lines of the London Transport Executive. The position with regard to the different traction systems and the trend towards uniformity is stated, and reference is made to the improvements in design of the more important items of equipment. Statistical information is given indicating the variety of the equipment in use and the magnitude and scope of the services operated.

DOI:10.1049/pi-1a.1950.0003

出版商:IEE    

年代:1950

数据来源: IET

摘要:

This paper points out the necessity for an exceptionally high degree of reliability throughout the arrangements tobe provided for operation of any underground railway, and it then describes the steps taken by the London Transport Executive to ensure freedom from interruption in the supply of electrical energy to all services upon which the movement of trains and the welfare of passengers depend.

DOI:10.1049/pi-1a.1950.0006

出版商:IEE    

年代:1950

数据来源: IET

摘要:

The paper briefly surveys the history of the suburban services out of Liverpool Street station and gives the reasons for the electrification of the line to Shenfield, with an indication of the anticipated improvements.The system of electrification adopted is that with current collection from an overhead line at 1 500 volts d.c., and the paper describes the power supply arrangements, the cable transmission system, the substations, the overhead line equipment, the multiple-unit rolling stock and the car sheds.Manufacture of the equipments had commenced before the war and a certain amount of overhead-line equipment had been installed on site, but all work was suspended early in 1940. The scheme was taken in hand again after the war, and the line was opened to service on the 26th September, 1949.Estimated figures for current consumption and maximum demands are given in the paper, but the service has not been in operation for a sufficient length of time to allow these estimates to be confirmed or any operating experience to be gained with the equipments.

DOI:10.1049/pi-1a.1950.0007

出版商:IEE    

年代:1950

数据来源: IET

摘要:

The paper reviews the achievements of British engineering in the field of railway electrification overseas, undertaken in widely differing circumstances, and designed to meet many and various conditions of operation.It includes a section devoted to Diesel-electric railway traction, and is divided into the following main headings: (1) Reasons for electrification, (2) Development of electrical equipment, (3) Typical electrifications in South Africa, New Zealand, Australia, and India, (4) Diesel-electric railway traction.The following tables summarizing equipment supplied are included: (1) Rolling stock equipment, (2) Substation equipment, (3) Diesel-electric equipment.

DOI:10.1049/pi-1a.1950.0008

出版商:IEE    

年代:1950

数据来源: IET

摘要:

This paper surveys the detrimental effects of multiple-unit electric trains on surface track in England. Electric track deterioration is almost entirely of mechanical origin, accentuated by intense traffic and similarity in the design and operation of trains embodying power bogies with axle-hung motors. The effects of track damage are cumulative and are enhanced by maintenance difficulties peculiar to electric lines. Reference is made to the factors influencing the performance of the track as a whole, and to more specific forms of rail damage among which periodic side-cutting figures importantly and is at present being studied by high-speed cinematography. The effects of electrification on the capital and maintenance costs of track are briefly considered.

DOI:10.1049/pi-1a.1950.0011

出版商:IEE    

年代:1950

数据来源: IET

摘要:

The economic distribution of the plant required for a railway electrification system is determined by the spacing of the substations. The paper deals theoretically with the factors influencing substation spacing, and contains formulae for calculating the ideal spacing in terms of the maximum allowable voltage-drop. Formulae are also included for determining the ideal spacing in terms of the maximum permissible overload-current setting of the track-feeder circuit-breakers to satisfy the condition that the current due to a short-circuit in the worst position must always be sufficient to trip the circuit-breakers.

DOI:10.1049/pi-1a.1950.0012

出版商:IEE    

年代:1950

数据来源: IET

摘要:

The paper summarizes the main operational characteristics of multiple-unit electric-traction rolling stock and its relative merits as compared with locomotive-hauled rolling stock. References to train formations operated by London Transport and the various Regions of British Railways on the electrified sections are included in the Appendix.Observations are made on major design aspects and the difference between tunnel and surface-line working.Comments are made on the make-up of trains, associated with equipment requirements, and the governing limitations from the economic viewpoint are outlined. Reference is also made to uncoupling and the provision of automatic equipment.

DOI:10.1049/pi-1a.1950.0013

出版商:IEE    

年代:1950

数据来源: IET

摘要:

The paper deals with the tractive resistance of passenger trains in still air, and with the effect of wind at various angles Reference is mado to the advantages to be gained by streamlining. Particulars arc given of tests to determine the additional tractive resistance in tunnels and on curves. Finally, the resistance of goods trains is discussed, with reference to such information as is available.

DOI:10.1049/pi-1a.1950.0014

出版商:IEE    

年代:1950

数据来源: IET

摘要:

The paper discusses the problems facing the designers of overhead equipment for the electrification of railways.The principal factors are treated in the following order: basic considerations, copper section and catenary system, span length and sag in the catenary, structures and foundations, layout, general design, track equipment fittings, switching, bonding of rails, feeder cables, lightning protection.In each case reference is made to present British practice, and occasional reference is made throughout the paper to Australian, Brazilian, Indian, Polish, and South African railways, with which both the authors have been intimately connected.

DOI:10.1049/pi-1a.1950.0017

出版商:IEE    

年代:1950

数据来源: IET