EMRI LX449-3FC automatic voltage regulator

The EMRI LX449-3FC Automatic Voltage Regulator is a high-performance digital AVR designed for precise voltage control in industrial, marine, and power generation applications. Featuring an enhanced power stage and integrated forced cooling, the LX449-3FC is ideally suited for generators requiring higher excitation currents and reliable operation under demanding conditions.

Engineered for maximum flexibility, the regulator supports both self-excited and PMG-equipped generators and offers a comprehensive range of control, monitoring, communication, and protection functions. Whether used in new installations or retrofit projects, the LX449-3FC delivers exceptional voltage stability and long-term reliability.

Key Features

✅ High excitation capacity with enhanced power stage
✅ Integrated forced cooling for improved thermal management
✅ Accurate generator voltage regulation
✅ Power Factor Control (PFC) functionality
✅ Quadrature droop compensation for parallel operation
✅ Adjustable current limiting and motor starting support
✅ Generator overvoltage, overcurrent, and overtemperature protection
✅ Excitation loss and overexcitation monitoring
✅ User-adjustable V/Hz (Volt per Hertz) protection
✅ CAN bus communication capability
✅ Status LED and alarm relay output
✅ Suitable for industrial, marine, and standby power systems

Advanced Protection Functions

The LX449-3FC incorporates a comprehensive range of protective features to safeguard both the generator and excitation system, including:

• Generator overvoltage protection
• Generator overcurrent protection
• Generator overtemperature protection
• AVR overtemperature protection
• Excitation current monitoring
• Phase sequence and phase loss detection
• Loss of excitation detection
• Current sensing supervision
• User-adjustable underspeed protection (V/Hz)

Ideal Applications

The LX449-3FC AVR is suitable for:

• Industrial generators
• Marine generators
• Emergency power generators
• Prime power installations
• Generator retrofit upgrades
• Parallel generator systems
• Utility grid-connected applications requiring Power Factor Control

Why Choose the EMRI LX449-3FC?

With its powerful excitation capability, advanced digital control platform, and extensive protection functions, the LX449-3FC provides generator manufacturers and service engineers with a versatile and future-proof AVR solution. The forced cooling design ensures dependable performance in high-load applications, while the comprehensive configuration options allow the regulator to be adapted to a wide variety of generator types.