Automatic Voltage Regulator AVR R438 Compatible With Leroy Somer GeneratorSpecifics: Condition: 100% Brand New Voltage regulation + 0. 5% at steady state and constant speed Phase to phase voltage sensing Controls by transistor means the regulation quality is independant of load applied Integrated "LAM" system to cope with increased loads applied to the engine Suitable for high levels of viration and harsh environments The R438 is compatible with other modules giving additional functions Standard power supply: AREP or PMG