Maximum and minimal speed detector for automatic electrogen groups. (Machine-translation by Google Translate, not legally binding)

摘要

Detector of maximum and minimum speed for automatic generator sets, especially to control and produce orders of action based on predetermined speeds, these speeds being lower and higher than the nominal speed of the group, characterized in that it comprises two basically equal circuits each constituted by a differential amplifier, which compares a following stabilized reference voltage with a control voltage from a tachometer generator coupled with the group, and whose output acts on a transistor whose conductor path closes the supply circuit of an auxiliary relay, said circuits provided with respective potentiometers that allow to modify the speeds of action in a wide field of the nominal value for which each one is foreseen, being assembled the different electronic elements on a printed circuit board that is joined by asparagus to a plac on the basis of a closed box, provided with fixing means, on the base plate of which, and below the printed circuit board, the auxiliary relays are fitted, each provided with independent inverting contacts. (Machine-translation by Google Translate, not legally binding)