Improvements in the construction of selected relays of maximum tension current or of inverse time power. (Machine-translation by Google Translate, not legally binding)

摘要

Improvements in the construction of selective relays of maximum voltage current or inverse time power, characterized by an electronic switching scale that is powered by an auxiliary direct current source and is driven by an adjustable voltage proportional to the intensity to be controlled. The input current and whose operation allows the charging of a timing capacitor on one side under a voltage supplied by the power supply and on the other hand under a voltage proportional to the current to be controlled from the input current while the voltage this timing capacitor, when it reaches the regulation level of a zener diode, drives a second electronic scale whose operation commands a tripping transistor that closes the excitation circuit of an output relay whose contacts command the circuits of use, for example, protection circuits, so that s it is possible to modify the response of the relay by changing the elements of the control circuit and mainly by adjusting the injected control voltage as a function of the input current. (Machine-translation by Google Translate, not legally binding)