Protection principles and Operating characteristics of the Voltage transformer differential protection devices

摘要

Based on the transformer products inter-circle short circuit process cause inter-circle voltage changes, will the change inter-circle voltage changing course in special extraction and judgment, so as to determine the working state of the winding is in working or in a short circuit process condition. Will the transformer inter-circle short circuit the whole process for DuoGe stage subdivision process of state quantity of and output can be sure transformer inter-circle road, process, the state energy a phase, low pressure or high pressure, can be in a small energy state determined signal, the suspension in advance for failure to provide timely signal.