The AVR has the faclity for droop CT connection,to allow parallel running with other similarly equipped generators. SX440 is a two phase sensed Automatic Voltage Regulator(AVR) and forms part of the exciation system for a brush-less generator. The AVR senses the voltage in the main generator winding and control the power fed to the stator and hance the main rotor to maintain the generator output voltage within the specified limits, compensating for load sprrd,temperature and power factor of the generator. Colour: Black Material: metal + PC Sensing Input: Voltage: 190-264V ac max, 1 phase 2 wire Frequency: 50-60HZ nominal Power inpot Voltage: 140-220 V ac max, 3 phase,3 wire Current: 3A/phase Frequency: 100-120HZ nominal Out put Voltage: max 120V/DC Current: continuous 2.7A/DC Intermittent 6A for 10 secs Resistance: 15 ohms minimum Regulation: +/-1% Thermal drift: 0.03% per .C change in AVR ambient Soft start pamp time: 3 sec Typical system response AVR respone: 10ms Filed current to 90%: 80ms Machine Volts to 97%: 300ms External voltage adjustment: +/-10% with 1k ohm 1W trimmer Under frequency protection Set point: 95%HZ Slope: 170% down to 30HZ Unit power dissipation: 12 watts maximum Analogue input Maximum input: +/-5V/DC Sensitivity 1V for 5% Generator Volts(adjustable) Input resistance 1k ohm Quadrature droop input 10 ohms burden Max.sensitivity:0.07A for 5% droop OPF Max.input:0.33A Over excitation protection Set point:75V/DC Time relay:10 sec Environmental Vibration:20 -100HZ (50mm/sec), 100Hz -2kHz Operating temperature: -40ºC to +70 ºC Relative Humidity: 95% Storage temperature: -55ºC to +80ºC Package Contents: 4 x Automatic Voltage Regulator Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.