Patent ID: 6285292
Filing Date: 2001-09-04
Classification: H02H

Abstract:
An electronic trip device comprising:a processing unit receiving current signals representative of currents flowing in a power system to be protected, comprising protection means and supplying a tripping signal when said currents exceed preset tripping values, andan initialization device for initialization of said processing unit comprising means for initialization after an interruption,said means for initialization after an interruption comprising:at least one storage register connected to the protection means to store a value of at least one quantity of a protection function and to supply a value of said at least one quantity when initialization of the processing unit is performed,a back-up power supply circuit to supply power to said at least one storage register, andmonitoring means for monitoring the back-up power supply circuit connected to an input of said at least one storage register to reset the value of the register to zero when a voltage of the back-up power supply circuit drops below a preset threshold.