Studying the law of partial discharge initiation voltage(PDIV)of corona resistant enameled wires under repeated high-frequency square wave pulse is beneficial to analyze the effects of different corona resistance test parameter on the corona resistance of enameled wires.By combining high frequency square wave pulse power supply,high-frequency current detection technology,and micro-control technology,a PDIV automatic test system for corona resistant enameled wires under repetitive high-frequency square wave pulse conditions was designed,and this system was used to test the PDIV of the twisted e...