Leroy Somer AVR R449 – Automatic Voltage Regulator

The Leroy Somer R449 is a durable analog Automatic Voltage Regulator (AVR) designed for industrial alternators operating with SHUNT, AREP, or PMG excitation systems. Engineered for reliability and performance, it ensures excellent voltage stability and fast response to sudden load variations, making it ideal for medium to large generator sets. Built to meet demanding industrial standards, the R449 provides long-term durability and consistent power regulation in diverse environments.

Key Specifications:

• Voltage Regulation: ±0.5% steady-state accuracy

• Excitation Current: 7 A continuous, up to 15 A for 10 seconds

• Sensing Supply Range: 85 V – 520 V AC (50/60 Hz)

• Response Time: Approx. 500 ms

• Operating Temperature: –30 °C to +65 °C

• Functions: U/f (voltage/frequency) protection, optional Load Acceptance Module (LAM)

• Compatibility: Suitable for Leroy Somer LSA 50-series and similar alternators