DOI:10.1049/pi-1a.1950.0018

出版商:IEE    

年代:1950

数据来源: IET

摘要:

The paper gives brief details of the conductor-rail systems used for electric traction by the London Transport Executive1and British Railways.The specification, testing, installation and maintenance of the 100- and 150-lb/yd flat-bottom conductor rails used on the Southern Region's 660-volt d.c. third-rail system which conforms to the Railway (Standardization of Electrification) Order, 1932, are described in detail. The associated electrical track equipment is reviewed.Details are given of the proposed new standard 106- and 150-lb/yd flat-bottom and 130-lb/yd rectangular conductor rails.The types of collector shoe-gear used by the London Transport Executive and Southern Region are also described.

DOI:10.1049/pi-1a.1950.0019

出版商:IEE    

年代:1950

数据来源: IET

摘要:

After describing the lightning conditions which exist in the South African electrified-railway areas, the paper deals with the practical aspects of lightning protection as applied to electric locomotives, electric motor-coaches, overhead track-equipment and traction substations associated with 3 000-volt d.c. electrified systems. A brief history of the early difficulties experienced and the measures taken to overcome them is given, and Tables are included indicating the actual results obtained from various protective devices. Finally, the author's conclusions are appended as to the most satisfactory means of protecting each section of a 3 000-volt d.c. electrified system.No account is taken of lightning effects on the extra-high-voltage transmission lines associated with the substation supplies as this subject is common to all high-voltage transmission systems and has been covered in other papers.

DOI:10.1049/pi-1a.1950.0020

出版商:IEE    

年代:1950

数据来源: IET

摘要:

The paper reviews 40 years of experience in the design, construction and maintenance of traction substations on British surface railways. It draws attention to the effect that the hazard of short-circuit over many miles of conductor rail has upon the arrangement and design of plant and apparatus.The number, size and type of converting unit are the main factors that dictate the design of the building, and in the approximate period 1915–1930 this influence was almost wholly determined by the rotary convertor. This unit has now been completely outmoded by the mercury-arc rectifier, and the consequential effects on the design and layout of the substation are discussed. The Southern Region of British Railways uses both types of installation, of which the rotaryconvertor section, although nearing the end of its life and scheduled for replacement, is still working to capacity at a reasonable cost.The increase in the capital cost of plant and building since 1915, and the manner in which the relative costs have been affected by the different type of converting plant, are discussed. The operation and maintenance of the two systems of conversion are compared, costs of operation are analysed, and the influence of supervisory control is disclosed. The experience so far gained is applied to a suggested design for substations of the future.

DOI:10.1049/pi-1a.1950.0021

出版商:IEE    

年代:1950

数据来源: IET

摘要:

The paper gives a brief description of the electrified sections of the South African Railways and the general details of the mercury-arcrcctifier traction substations provided on the different sections.The reasons are given for the decision to use inverters and rectifiers with grid control for compounding on the extensions to the electrified sections in Natal. Reference is also made to the type of plant selected for the new projects. The characteristic curves for the different types of plant are submitted, and the advantages and disadvantages are indicated.The difficulties which have been experienced under service conditions and the remedial measures taken are discussed.

DOI:10.1049/pi-1a.1950.0022

出版商:IEE    

年代:1950

数据来源: IET

摘要:

The paper gives a general description of electric locomotives built for service on British Railways, but assumes that the usual system of series-parallel contactor control of traction motors, with field weakening by diversion or tap, issufficiently well known to need no detailed description here. The locomotives described are all d.c. machines and operate either at 630–660 volts or at 1,500 volts. Interesting features of the various designs are described, some operatingresults are shown, and there is a note on the bogie arrangements on the Eastern Region and Southern Region locomotives. Inview of their unorthodox control system, the Southern Region locomotives have been given special attention, and mention is made of the work now in hand for future locomotive designs on this Region.

DOI:10.1049/pi-1a.1950.0025

出版商:IEE    

年代:1950

数据来源: IET

摘要:

The paper gives a brief history of the attempts made to utilize the Diesel engine for railway traction, and the trend towards electric transmission for larger-powered units.The entirely different considerations in the application of Diesel-electric motive power to shunting and to main-line work are treated separately.The Diesel-electric shunting locomotive must be capable of meeting a fairly definite set of operating requirements, and these practically determine the main features of design.The basis of the design of the main-line Diesel-electric locomotive is that it shall perform the duties of one of the existing traffic classes of steam locomotives. A comparison between the operating characteristics of steam and Diesel locomotives is difficult, because of the different speed/tractive effort characteristics and other variables.The dominating problem in the design of the main-line locomotive is to compromise between the restricting limits of space and weight, and yet have an engine which will operate at a high load factor, at the same time giving reliability and economical running.The scope for Diesel-electric traction for main-line locomotives in this country must depend upon the extent to which its potential availability can be utilized.

DOI:10.1049/pi-1a.1950.0026

出版商:IEE    

年代:1950

数据来源: IET

摘要:

The paper deals with that part of the locomotive which may termed the chassis and body work; it does not concern itself with mechanical design of electrical apparatus.After surveying the physical limitations within which locomotives must be designed, the paper outlines the three main groups into which chassis design naturally falls, namely the arrangement based on steamlocomotive practice, the articulated-bogie type and the independentbogie type. Examples in each group are described, and special attention is given to variationsin bogie design.Main-frame and body design is followed by sections on brake gear and train heating equipment, and a final section endeavours to summarize present trends.

DOI:10.1049/pi-1a.1950.0027

出版商:IEE    

年代:1950

数据来源: IET

摘要:

The paper briefly surveys the mechanical design only of lightweight motor- and trailer-coaches, and outlines the principles governing designs in light aluminium-alloys, stainless steels and low-alloy high-tensile steels, by the use of which, reductions in the tares of vehicles can be effected. The characteristics of these materials are given, and it is shown how savings in weight may be achieved.

DOI:10.1049/pi-1a.1950.0028

出版商:IEE    

年代:1950

数据来源: IET

摘要:

The paper presents a review of problems and practice in the design and arrangement of control gear for the main motors, together with some notes on auxiliary machines and services, for modern directcurrent electric locomotives.Most of the locomotives now in service are equipped with rheostatic control, employing resistors in the power circuit between the supply line and the main motors, and the energy loss involved is one of the main reasons for the development of several interesting alternatives using rotating machines, e.g. boosters, motor-generators, metadynes.In view of the widespread use of rheostatic control, the paper is confined to this system.The subject is divided into the following functional groups covering the main features of the equipment: (1) power-circuitarrangements, (2) current collection, (3) power-circuit apparatus, (4) control circuits for main motors, (5) control-circuit apparatus, (6) protection, (7) auxiliary machines and control, and (8) layout of equipment.The important subject of electric braking will be discussed in another paper, and is not therefore included.

DOI:10.1049/pi-1a.1950.0031

出版商:IEE    

年代:1950

数据来源: IET