Improvements in the systems of protection against investment of power. (Machine-translation by Google Translate, not legally binding)

摘要

Improvements in the systems of protection against the inversion of power, characterized by the fact of having a circuit composed of two transistors in differential connection, and a filter, in which the terminals of the collectors receive a voltage proportional to the current of the network, and the base terminals receive a voltage proportional to the network voltage, so that the voltage obtained at the filter output is opposed by another reference voltage, inversely proportional to that of the network and coming from a circuit auxiliary equipped with a potentiometer that allows to regulate the ratio of proportionality, being applied the difference between said opposing voltages to a final circuit composed of an amplifier, a trigger and a disconnection relay for the element object of protection, all in a way that, the values of the aforementioned opposing voltages being equal, said relay remains in service, while and when a certain inequality occurs, the relay itself disconnects the expressed element object of protection. (Machine-translation by Google Translate, not legally binding)