limit relay magnet against the pull of a spring (or a weight or another relay coil), and as the motor speeds up the power current ... necessary for a proper regulation and control of motors; Selection of equipment, wiring, and arrangement will be considered later. ... Locking the leaves. ... This diagram shows buttons for shortcircuiting the switches controlled by warning devices, so that the gates ELECTEICALanbsp;...
|Title||:||Electrical equipment on movable bridges|
|Author||:||Condé Balcom McCullough, Albin Leroy Gemeny, William Roy Wickerham|