Leroy Somer AVR R220 – Automatic Voltage Regulator

The Leroy Somer R220 is a compact and reliable Automatic Voltage Regulator (AVR) designed for small to medium-sized alternators. Using a SHUNT excitation system, it provides precise voltage regulation and stable output under varying load conditions. With its simple design and robust construction, the R220 ensures dependable performance, easy installation, and minimal maintenance, making it an excellent choice for general-purpose generator applications.

Key Specifications:

• Voltage Regulation: ±1% steady-state accuracy

• Excitation Current: 4 A continuous, 7 A maximum for 10 seconds

• Sensing Voltage Range: 170 V – 260 V AC (50/60 Hz)

• Response Time: <500 ms typical

• Operating Temperature: –40 °C to +70 °C

• Excitation System: SHUNT type

• Protection: Built-in over-excitation and thermal protection

• Compatibility: Suitable for Leroy Somer TAL, LSA, and equivalent alternator models