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 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 factor of the generator. Vibration:20 -100HZ (50mm/sec), 100Hz -2kHz Colour: Black Material: metal + PC Sensing Input: Voltage: 190-264V ac max, 1 phase 2 wire Frequency: 50-60HZ nominal 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 deg.C change in AVR ambient Soft 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 : 95%HZ Slope: 170% to 30HZ Unit dissipation: 12 maximum Analogue input Maximum input: +/-5V/DC Sensitivity 1V for 5% Generator Volts(adjustable) Input resistance 1k ohm Quadrature droop input 10 ohms Max.sensitivity:0.07A for 5% droop OPF Max.input:0.33A Over excitation protection Set :75V/DC Time relay:10 sec Environmental Vibration:20 -100HZ (50mm/sec), 100Hz -2kHz Operating temperature: -40C to +70 C Relative Humidity: 95% temperature: -55Cto +80C Package Contents: 1 x Automatic Voltage Regulator Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.