The DV966A2NCI is an in-line processing and control device to be installed in Primary Substations (conversion from high to medium voltage) by ENEL Distibuzione managed with isolated or compensated neutral. The main purpose of the DV966 is to ensure, by means of the automatic functions of the neutral state controller (NSC), the correct arrangement of the IMS in relation to the layout of the compensation coils. The DV966 performs local processing of medium complexity such as: NSC logic, minimum continuous voltage protection, interface with portable PC management software. The DV966 is fully configurable and programmable by means of a portable personal computer connected via ETHERNET. The DV966 application program can also be updated on site via ETHERNET.