Part No.: R221 (often miswritten as AR221) Leroy Somer Single Phase Automatic Voltage Regulator
Brand: Leroy Somer
Type: Single-phase dedicated AVR for brushless alternator
Sensing Input: 85–139 VAC, 50/60 Hz
Regulation Accuracy: ±0.5%
Max Excitation Output: 4 A DC
Adjustable Output Voltage: 90–130 VAC
Protection: Under-frequency protection
Response Time: ≤ 500 ms
Operating Temp.: -20℃ ~ +60℃
