Electronic relay for the protection of three-phase motors against over-thoughts and unbalance of phases (Machine-translation by Google Translate, not legally binding)

摘要

Improvements in the object of invention patent n. 8700022 for electronic relay for protection against ac motors overcurrent and phase imbalance. Consisting of a transductor trifasico and another of lack of phase signals that deliver the bridges sendos diode rectifiers, electrolitico charging a capacitor via resistors. When the capacitor reaches a certain voltage value forces this lead to produce this transistor and cutting a second transistor, whose collector connected to a relay, resulting in the disconnection of any switching device. The relay includes two buttons activation produce whose unlatching o reset relay with different times of firing. The relay is connected to a power source additional feeding coil excitation of said relay. It also features two buttons queregulan mode operation: weighing start, start normal and time disparoscortos. (Machine-translation by Google Translate, not legally binding)