• AVR-STAMFORD SX440
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Technical specification 
INPUT 
 Voltage 190-264V ac   
 Frequency 50-60 Hz nominal 
 Phase 1 
 Wire 2 
OUTPUT 
 Voltage max 90V dc at 207V ac input 
 Current continuous 4A dc 
  Intermittent 6A for 10 secs 
 Resistance 15 ohms minimum 
REGULATION 
  +/- 1% (see note 1) 
 
THERMAL DRIFT 
 0.04% per deg. C change in AVR ambient (note 2
 
TYPICAL SYSTEM RESPONSE 
  AVR response  20ms 
  Filed current to 90% 80 ms 
 Machine Volts to 97% 300ms 
 
EXTERNAL VOLTAGE ADJUSTMENT 
  +/-10% with 1 k ohm 1 watt trimmer (see note 3) 
 
UNDER FREQUENCY PROTECTION 
  Set point 95% Hz (see note 4) 
 Slope 170% down to 30 Hz 
  
UNIT POWER DISSIPATION 
  12 watts maximum 
BUILD UP VOLTAGE 
  4 Volts @ AVR terminals 
ANALOGUE INPUT 
  Maximum input  +/- 5V dc (see note 5) 
 Sensitivity     1v for 5% Generator Volts (adjustable) 
 Input resistance  1k ohm  
QUADRATURE DROOP INPUT 
 10 ohms burden 
 Max. sensitivity: 0.07 A for 5% droop 0PF 
 Max. input:  0.33A 
ENVIRONMENTAL 
  Vibration 20-100 Hz 50mm/sec 
  100Hz – 2kHz 3.3g 
 Operating temperature -40 to +70 o
C  
 Relative Humidity 0-70 o
C  95% (see note 6) 
 Storage temperature -55 to +80 o
C