ABB DSAO120A 3BSE018293R1是一种数字化保护测控单元，可以用于110kV及以下电力系统的保护、测量和控制。该设备采用了先进的数字化技术，可以实现遥测、遥信、遥控等功能，同时还可以提供多种保护和控制功能，如过电流保护、速断保护、接地保护等。

It is a digital protection and measurement unit that can be used for protection, measurement, and control of 110kV and below power systems. This device adopts advanced digital technology, which can achieve functions such as telemetry, remote signaling, and remote control. At the same time, it can also provide various protection and control functions, such as overcurrent protection, quick break protection, grounding protection, etc