The new Digital Voltage Regulator D-Vo is an electronic microprocessor-based device which manages the operating electrical parameters of synchronous generators. The power supply to the exciter is through a PWM power stage. The D-Vo AVR can be interfaced and programmed using the standard Modbus communication protocol and a proprietary PC application supplied by Marelli Motori. The new D-Vo regulator is a standard feature of all generators >800 frame size and all HV (std) generators, it is also compatible with any Marelli Motori generator. J 4 Operating modes: o Automatic Voltage Regulation (AVR mode) o Power Factor Regulation (PF mode) o Reactive Power Regulation (VAR mode) o Field Current Regulation (FCR mode) J Stability parameters individually configurable (P.I.D.) or pre-defined standard parameterization J Soft start with adjustable ramp, in AVR mode J 1-ph or 3-ph generator voltage sensing J 1-ph or 3-ph generator current sensing J 1-ph grid voltage sensing J 3 auxiliary analogue inputs for remote setpoint control J Input for external potentiometer J 9 digital contacts (8 programmable) J Parallel function with similar generators operated with OUTPUTS Reactive Droop Compensation J Generator protections: o Field over-voltage J Excitation limiters (over- and under-excitation) J Watchdog J Under-frequency limiter J PWM output max. 10A continuous, 20A forcing for 10s J 3 configurable output relays for alarm and FRT The D-Vo is equipped with a Fault Ride Through (FRT) function that allows to detect the Low Voltage Ride Through (LVRT) or the High Voltage Ride Through (HVRT) and provides a dynamic support of reactive current during the event. FRT Management options available: J Standard J AVR mode J FRT detection and management J Certifications: ° CE

USER INTERFACE y 1 USB port for connection to PC with Marelli Motori proprietary software or custom software y 1 Ethernet port for connection to PC with Marelli Motori proprietary software or custom software y Communication protocol: Modbus RTU (USB), Modbus TCP/IP (Ethernet) Marelli Motori S.p.A. Marelli Motori Asia Sdn Bhd Via Sabbionara 1 Lot 1-8, Persiaran Jubli Perak, 36071 Arzignano (VI) - Italy Seksyen 22, 40300 Shah Alam, (T) +39 0444 479 711 Selangor D.E. - Malaysia