The AVR features a droop CT connection for parallel operation with other similarly equipped generators. SX440 is a two-phase sensed Automatic Voltage Regulator (AVR) and forms part of the excitation system for a brushless generator. The AVR senses voltage in the main generator winding and controls the current supplied to the exciter stator, thereby regulating the main rotor field to maintain generator output voltage within specified limits—compensating for load changes, temperature variations, and generator power factor. Vibration: 20–100 Hz (50 mm/sec), 100 Hz–2 kHz Color: Black Material: Metal + PC Sensing Input: Voltage: 190–264 V AC max, 1-phase, 2-wire Frequency: 50–60 Hz nominal Input: Voltage: 140–220 V AC max, 3-phase, 3-wire Current: 3 A/phase Frequency: 100–120 Hz nominal Output: Voltage: Max 120 V DC Current: Continuous 2.7 A DC; Intermittent 6 A for 10 seconds Resistance: Minimum 15 ohms Regulation: ±1% Thermal drift: 0.03% per °C change in AVR ambient temperature Soft start time: 3 seconds Typical system response: AVR response: 10 ms Field current to 90%: 80 ms Machine voltage to 97%: 300 ms External voltage adjustment: ±10% using a 1 kΩ, 1 W trimmer Under-frequency protection: Set point: 95% of nominal frequency Slope: 170% down to 30 Hz Unit power dissipation: Max 12 W Analog input: Maximum input: ±5 V DC Sensitivity: 1 V = 5% generator voltage (adjustable) Input resistance: 1 kΩ Quadrature droop input: Resistance: 10 ohms Maximum sensitivity: 0.07 A for 5% droop OPF Maximum input: 0.33 A Over-excitation protection: Set point: 75 V DC Time delay: 10 seconds Environmental specifications: Vibration: 20–100 Hz (50 mm/sec), 100 Hz–2 kHz Operating temperature: –40°C to +70°C Relative humidity: 95% Storage temperature: –55°C to +80°C Package Contents: 1 × Automatic Voltage Regulator Note: Colors may vary slightly due to monitor/display settings. Measurement tolerance: ±1–3 cm.