. Electric railway journal . car can be readily removed, thusenabling the heavy parts of the equipment to be reachedby crane or derrick. This makes rapid repairs possibleand also reduces the cost of such repairs when com-pared with what would be necessary for a portable sub-station of the usual type. One of the companys regular steel underframe flatcars was used and the superstructure built on this, theside posts being placed in the stake pockets along thesides of the car. The type of construction used and thelocation of the apparatus can be readily seen in theaccompanying illustrations. The c
. Electric railway journal . car can be readily removed, thusenabling the heavy parts of the equipment to be reachedby crane or derrick. This makes rapid repairs possibleand also reduces the cost of such repairs when com-pared with what would be necessary for a portable sub-station of the usual type. One of the companys regular steel underframe flatcars was used and the superstructure built on this, theside posts being placed in the stake pockets along thesides of the car. The type of construction used and thelocation of the apparatus can be readily seen in theaccompanying illustrations. The construction of the high-tension and direct-cur-rent choke coils has some rather unusual features. Thehigh-tension choke coils are made of No. 2 solid barecopper wire and consist of twenty-five turns 15 in. indiameter on a 2-in. spacing. Each coil is held in shapeby three wood clamps running the full length of the direct-current choke coil is an extra large one, 30in. in diameter, and consists of ten turns of 400,000. Transformer Section with Portions of Side andRoof Removed covered cable. This is also held in shape bywooden clamps. This direct-current choke coil is placedon the roof of the car and all parts were made in thecompanys shops. The equipment of this portable substation consists ofa 500-kw., six-phase rotary, three 200-kva., 26,000-voltto 390-volt, oil-insulated, self-cooled transformers, atwo-panel switchboard, gap-type lightning arresters andchoke coils. Type of Interurban Car for Germany IN DESCRIBING some design and structural featuresof a type of interurban car recently purchased by arailway in Germany, Engineering Progress says thatdespite materially greater strength, it has been foundthat iron bodies which are designed as a beam of largecross-section are lighter than wooden ones. The faultof the cars built of wood was that none but the longi-tudinal beams were used to support the body. The carswith bodies having a wooden framework weighed from
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