. Operation of trains and station work and telegraphy . FIG. 95. GENERATOR SWITCH WITH FOUR-CIRCUIT PANELBOARD IN DOUBLE SECTION IRON BOX. One lead of a resistance coil is connected to this in-sulated terminal, and the other lead is connected to therear segment of the triple contact. The negative lead ofthe generator is also connected to this segment. Theleads of the lifting coil are connected, respectively, to thepositive main contact, and the terminal to which the flexi-ble conductor is attached. Thus it will be seen that when 200 RULES FOR MOVEMENT OF TRAINS • the plug establishes the tripl
. Operation of trains and station work and telegraphy . FIG. 95. GENERATOR SWITCH WITH FOUR-CIRCUIT PANELBOARD IN DOUBLE SECTION IRON BOX. One lead of a resistance coil is connected to this in-sulated terminal, and the other lead is connected to therear segment of the triple contact. The negative lead ofthe generator is also connected to this segment. Theleads of the lifting coil are connected, respectively, to thepositive main contact, and the terminal to which the flexi-ble conductor is attached. Thus it will be seen that when 200 RULES FOR MOVEMENT OF TRAINS • the plug establishes the triple contact it also short-circuitsthe resistance coil. When the plug is raised, it throwsthe resistance into series with the lifting coil. Two advantages result from inserting resistance intothe lifting coil circuit: First, to reduce the .current andconsequent heating in the coil, which would otherwisechange its resistance and alter the adjustment of theswitch; second, to reduce the magnetizing effect of thecoil, so that less discharge current will be
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Keywords: ., bookcentury1900, bookdecade1910, bookidopera, booksubjecttrainmen
