. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . 7 Fender chain, main pump 1—70 Fender chain, operating valve. 1— /2 Rising stem gate valve 1—40 Cylindrical valve 1— 7 Guard valve 1—25 Auxiliary culvert valve 1— 7 Totals 218 122 160 500 12,020 Number of Motors. Total HorsePower. Gatun. Pcd. M. Mira. Total. 40 24 28 92 2,300 20 12 14 46 322 16 16 16 48 3,360 16 16 16 48 24 56 24 36 116 4,640 60 20 40 120 840 6 6 6 18 450 4 4 4 12 84 control connections are arranged in suchmanner that each individual machine maybe controlled locally. This arr
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . 7 Fender chain, main pump 1—70 Fender chain, operating valve. 1— /2 Rising stem gate valve 1—40 Cylindrical valve 1— 7 Guard valve 1—25 Auxiliary culvert valve 1— 7 Totals 218 122 160 500 12,020 Number of Motors. Total HorsePower. Gatun. Pcd. M. Mira. Total. 40 24 28 92 2,300 20 12 14 46 322 16 16 16 48 3,360 16 16 16 48 24 56 24 36 116 4,640 60 20 40 120 840 6 6 6 18 450 4 4 4 12 84 control connections are arranged in suchmanner that each individual machine maybe controlled locally. This arrangementprovides for emergency operation shouldthe control circuits from the central con-trol house be out of order. LOCATION AND OPERATION OF LOCKMACHINERY. From an operating standpoint the ma-chinery was placed below the coping ofthe lock walls, thus affording a clear spacefor maneuvering ships and protecting theapparatus from the weather without erect-ing numerous houses. The mitering gates consist of two mas-sive leaves pivoted on the lock wallswhich operate independently of each. INTERLOCKING SYSTEM BELOW THE MIRAFLORES LOCKS. There are many motors not includedabove, as, for instance, those for the spill-way gates, for the hand rails on the miter-ing gates and for the sump pumps. Thespillway gates are remote controlled froma special control board, and the controlof the hand rail motors is given in con-nection with the discussion of miteringgates. The motors are started and controlledby contactor panels located near them,the contactors of which handle the mainmotor currents. These contactors arecontrolled from the central control smaller motors, including those forcylindrical valves, auxiliary culvert valves and one for reverse. In the case of largermotors for miter gate moving, rising stemvalves and guard valves, a starting pointwith resistance in two legs of the three-phase circuit is provided. In all cases the contactors are operatedfrom the control
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
