R448 AVR | Leroy Somer Automatic Voltage Regulator

• AVR Power Supply: 2 auxiliary windings (X1, X2, and Z, Z2)
• Shunt Supply: 150V - 5060Hz
• Rated overload current: 10A, 10s.
• Built-in Electronic Protection (overload, short circuit, loss of sensing): If excitation current exceeds 10 amps for over 10 seconds, it automatically drops to around 1A. To reset AVR protection, stop the generator or cut the supply voltage to the AVR. Power inputs protected by fuses F1.
• Voltage Sensing: Utilizes a 5VA insulated transformer with input voltage taps:

Terminals 0 - 110V = 95 to 140V

Terminals 0 - 220V = 170 to 260V

Terminals 0 - 380V = 340 to 520V

Technical Details