Digital Voltage Regulator


D350 AVRThe D350 digital automatic voltage regulator (AVR) for industrial alternators provides excitation current up to 5 A with excellent reliability for SHUNT, permanent magnet (PMG) or AREP (auxiliary winding) excitation types.

D350 includes advanced protections such as over-excitation limitation and voltage sensing loss. It also includes speed detection capabilities, with over- and under-speed alarms. D350 also features voltage droop for genset parallel operation, and it is equipped with a Load Acceptance Module (LAM) to handle load impact events.

Key specifications

Technology Digital
Excitation mode SHUNT, AREP, PMG
Rated excitation current 5 A
Regulation accuracy (+/- %) 0.25 %
Frequency range 10 – 100 Hz
Voltage setting range (+/- %) 30 %
kU/F limitation 0.5 < k< 3
Loss of sensing voltage
Over-excitation limitation
Short circuit current limitation
Voltage droop
Parallel operation between alternators
Load Acceptance Module (LAM)

Compatible products

Configuration & setup

D350 can be configured using the Leroy-Somer EasyReg Advanced software.

Technical notes

ER09 : D350 contactor setting for three different voltages



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