DIY NAS: 2026 Edition and The 2026 EconoNAS! > 자유게시판

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The presence of the third rail or trolley and the transmission line throughout the appropriate of means is in itself a certain source of hazard. The working expenses of a mean steam railroad may be roughly divided as follows: Maintenance of approach 21 per cent., upkeep of gear 19 per cent., conducting transportation 56 per cent., normal bills four per cent. For the complete car, nonetheless, the surplus weight can be solely about 12 per cent. This methodology of subdivision, however, is not so readily potential within the transmission and conducting techniques leading energy to the trains and accidents to this portion of the gear constitute one of the vital serious menaces to the steady operation of an electric railroad. This might be due in giant measure to the lengthy standing figure of 600 volts for trolley service; this figure, nevertheless, is fixed by the character of the direct current motor and never by any consideration of potential danger from shock. The control of power to trains in sections or blocks can be potential.

The provision of power to all trains from one power home is objectionable from the standpoint that an accident at the power house could stop all trains. 10 V so I burnt one out while adjusting the supply rail voltages. In a collision the hazard of a fireplace from a third rail in some measure offsets the similar hazard from a locomotive hearth field. The steam locomotive contains hearth box, boiler, steam engine and amenities for handling coal and water. The fireplace box and boiler are absent as sources of danger in a collision, what is electric cable as are additionally apparatus for steam or hearth heating and oil or gasoline lighting. For obvious causes neither is as environment friendly as the identical apparatus of a stationary kind. This danger beneath electrical operation is minimized by an intensive subdivision of all the ability house apparatus. The variety of car miles per prepare-minute of delay has been nearly doubled on the elevated traces of latest York because the electrical operation was inaugurated.

A further source of disturbance by electrical operation is the interference by electrostatic and electromagnetic induction between the transmission conductors and the telegraph and telephone traces in the vicinity. On a tramway labored on the overhead principle present is supplied to the cars by two overhead conductors or wires. So dependable has this methodology of suspension come to be regarded that it is now typically used for crossings of telegraph, phone and transmission wires in place of the usual cradle or community of wires stretched between the two lines. The danger from this supply, nevertheless, has been overestimated, and the danger of shock from a high voltage trolley is virtually eliminated by the fashionable methods of suspension. The thorough grounding or connecting to the rail of all the helps of the trolley wire ensures that even within the unlikely instance of the breaking of the overhead construction the wire will haven't any voltage when it reaches the ground. The final value of the steadiness in coal saving will depend on the proportion of time wherein the facility station operates to its full capacity. The entire prepare weights are thus 580 and 900 tons and the electric locomotive weighs 100 tons lower than the steam locomotive, resulting within the consequent saving within the ton mileage of dead weight.

Considering this stuff under electric operation the best saving is effected in the item of conducting transportation, which incorporates the price of coal. A lower in the operating expenses has already been acknowledged as one of many means by which electric operation may be made to pay. Whatever could also be mentioned of the steam locomotive in its comparison with the electric motor, the locomotive is self-contained. The excess of useless mileage and the surplus ton mileage owing to the larger weight of the steam locomotive have already been famous, and are additionally causes for excess coal consumption. The controlling switches C C are provided with one and sometimes two handles, certainly one of which is used to regulate the velocity of the car and stop and start it, while the other is for the purpose of reversing the course wherein it runs. Although neither expense nor pains were spared in the construction of this line, the associated fee being comparable with that of the Prussian system, two years had not elapsed before some of the wires ceased to work, and, though these had been changed and workmen saved continually busy on the road, at the end of seven years the line was wholly abandoned in favor of overhead wires.