【正文】 In the same power arm of a motor with a call for subparagraph, and if the interval between stations market (vertical), the station goods yard line, handling lines, of the pipeline, market and the market within the hub between, etc. (horizontal).With a call for the four crossanchors subparagraph structure of joints, or using sub insulation devices + 3 crossanchors of key structures.Hours of electricity sub structure for early crosseight (two four crossreducing) anchors of the jointsand later to three hours of crossanchors of insulation devices + joints replaced. In recent years, following a steady improvement in the speed of the train, anchors of joints because of their flexible structure of hours of good, hard little affected by the smooth transition of power bow advantage in acceleration zone and the gradual introduction of highspeed sector also. It must be noted that motorcycle through hours of 石家莊鐵道學院畢業(yè)設計33electricity insulation, the power through the adoption of the devices break apart before, slide through and then closed the circuit breakers continue to operate, otherwise they will be evoked strong electric arc, resulting in alternate with short circuit, and even destroy contact work.(四) The Electricity Network ApproachMy electrified railway adopt unilateral power means that the traction substations to the power supply work, then each of the next stop electricity only from one work to the access of electric traction substations (from the two sides agreed bilateral energy and electricity, will enhance the contact work using work pressure, but because of its failure wide, protective devices plex reasons that have not yet adopted). Of line segments district booths will be available through links on the contact work, the realization of parallel connection of electricity, it may be appropriate to raise the pressure pipe works. When traction substations failure, through zoning Pavilion adjacent substations to achieve the power zone, when electricity expanded work pressure lowering usually be reduced to a few or drive train will be few, in order to maintain operations.Direct Way ElectricityAs stated earlier, the introduction of electrified railway workers frequency the public frequency of singlephase munication electric traction system, and singlephase current load in the contact work to change electromagic fields generated around the space, thereby to nearby devices and radio munication facilities have certain electromagic interference. My early electrified railway (such as Po into Line, the Shenyang Line) building, in the mountains, the local munications technology developed, the railway munication using high performance coaxial cable shield, then the effect is minimal electromagic interference, not to take special protective measures, this unilateral approach also known as the electricity supply direct way (short for TR electricity manner). With the electrification of the railway to the plains and cities, the growing contradictions prominent electromagic interference, so in a different way to the electricity work protection measures will produce different power supply. There are socalled BT, at and DN electricity. As can be seen from the introduction of these methods have a mon power supply features in the contact work backbone adjacent fields with the same high office to contact flags have a wire attached. Electric traction, additional wire, and then passes through the electric current through the drive current, theory (or 石家莊鐵道學院畢業(yè)設計34ideals) of equal size, the opposite direction to both produce electromagic interference mutual offset. But in fact do, so different methods have different protective effects of electricity.Flow Transformer (BT) Forms of ElectricityThis power, in contact with every online a distance with a Taiwan smoking transformer flow (change pared to 1:1), the original margin string to the contact work, the margin string to return line (as NF line aircraft in the contact work backbone adjacent fields, and contacts flying high), each two smoking transformer flow between a smoking on line, will return line with rail connections, Its role is to return the suspended use to, the back line to drive substations, a tamperresistant effect. Because land back and the socalled half effect, BT electricity manner protective effect is not ideal, with the addition of passive to cause devices to plex work structure, the flow of motorcycles conditions deteriorated in recent years have rarely used.AT Power Supply Electricity use at manner, the main change being substations to 55kV output voltage via at (AT transformers and change than 2:1) to receive electricity supply work, one lead to Contact Network , another lead are feeder lines (as AF line, but also in the。 Tunnels and bridges (for the bridge) and other large office buildings, as the case may be for the design and, if necessary, use special structures.Positioning DevicesPositioning devices including locator and positioning control, whose role is to guarantee the line of contact with the relative position of the bow within the specified scope and the level of tension to the line of contact pillars.The Foundation PillarsContact flags and support pillars to bear the load devices, and provides access to the high flying fixed. Reinforced concrete pillars are hollow and pillar two. The use of reinforced concrete poured into the legislative basis, the foundation laid in roadbed。 (8)Leading electricity circuit fluid.(二) Great Way to The FlagElevated primarily contain work of contacts flags, support devices, positioning devices and pillar base four major ponents. First three quarters of charged, and pillar (or other structures) grounded in insulate between separated.Contact FlagsNormally, the power demand for access by hoisting, hanging string, the