. Electric railway journal . P B Secondary*-Phase of JConverter \ C 3-Phase LMotors ne to PENNSYLVANIA LOCOMOTIVE—FIGS. 4 AND 5—DIAGRAMS SHOW-ING HOW PART OF THE POWER IS DISPLACED 90 DEG., ALSO THETRANSFORMER CONNECTIONS BY WHICH THE THREE-PHASEPOWER IS OBTAINED October 6, 1917] ELECTRIC RAILWAY JOURNAL 621. PENNSYLVANIA LOCOMOTIVE FIG. 6 — MASTER CONTROLLER SHOWING THE THREE OPERATING LEVERS are also used as reversing switches. One of theswitches is used commonly for both forward and re-verse operation, and the other four switches are usedin pairs to interchange the connections of two of the
. Electric railway journal . P B Secondary*-Phase of JConverter \ C 3-Phase LMotors ne to PENNSYLVANIA LOCOMOTIVE—FIGS. 4 AND 5—DIAGRAMS SHOW-ING HOW PART OF THE POWER IS DISPLACED 90 DEG., ALSO THETRANSFORMER CONNECTIONS BY WHICH THE THREE-PHASEPOWER IS OBTAINED October 6, 1917] ELECTRIC RAILWAY JOURNAL 621. PENNSYLVANIA LOCOMOTIVE FIG. 6 — MASTER CONTROLLER SHOWING THE THREE OPERATING LEVERS are also used as reversing switches. One of theswitches is used commonly for both forward and re-verse operation, and the other four switches are usedin pairs to interchange the connections of two of thephases to obtain forward or reverse rotation of themotors. The motors are arranged for the two normalrunning speeds of approximately 10 and 20 the low speed, each pair of motors is connected incascade, the secondary of one motor being connectedto the primary of the other, the secondary of which isconnected to an adjustable liquid rheostat used foraccelerating or speed regulating purposes. On thehigh speed the motor primaries are connected to thethree-phase supply in parallel, each secondary beingconnected to a regulating liquid rheostat. The controlis arranged so that the change from one speed to an-other is made without losing more than half of theaccelerating or regenerating torque, this
Size: 2950px × 847px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkmcgrawhillp
