Electronic trip device sets reference voltage to one preset value when power-in of trip device is performed or when measured current is greater than preset threshold, and to another preset value after preset period

摘要

An electronic processing circuit (2) compares the measured current with preset threshold, and a regulation unit (11) regulates the voltage at the capacitor terminals according to preset reference voltage. The reference voltage is set to one preset value when power-in of the trip device is performed or when the measured current is greater than preset threshold, and to another preset value after preset period.