Stamford Automatic Voltage Regulator - AVR AS440
- Stamford
- UK
- 7 days
- 1000 sets
The AS440 is an analogue, 2-phase sensing, self-excited automatic voltage regulator (AVR). The AS440 incorporates Surface Mount Technology (SMT) to its design.
The AS440 is supplied as standard to the STAMFORD® S4 and STAMFORD® HC5 alternators and is an option for the STAMFORD® UC22 and UC27 alternators.
The AS440 is an analogue, 2-phase sensing, self-excited automatic voltage regulator (AVR). The AS440 incorporates Surface Mount Technology (SMT) to its design.
The AS440 is supplied as standard to the STAMFORD® S4 and STAMFORD® HC5 alternators and is an option for the STAMFORD® UC22 and UC27 alternators.
Technical specification:
SENSING INPUT
Voltage: Jumper selectable, 100-130 Vac 1 phase or 190-264 Vac 1 phase
Frequency: 50-60 Hz nominal
POWER INPUT
Voltage: 100-264 Vac 1 phase
Frequency: 50-60 Hz nominal
OUTPUT
Voltage: 82V dc at 200V ac
Current: continuous 4A dc, Intermittent 7.5 A for 10 secs
Resistance: 15 ohms min (10 ohms min when input volts is less than 175 ac)
REGULATION
+/- 1.0%
THERMAL DRIFT
0.03% per deg. C change in AVR ambient
TYPICAL SYSTEM RESPONSE
AVR response: 20 ms
Filed current to 90%: 80 ms
Machine Volts to 97%: 300 ms
EXTERNAL VOLTAGE ADJUSTMENT
+/-10% with 1 k ohm 1 watt trimmer
Increasing resistance lowers voltage
UNDER FREQUENCY PROTECTION
Set point: 94-98% Hz
UNIT POWER DISSIPATION
12 watts maximum
ENVIRONMENTAL
Vibration: 20-100 Hz 50mm/sec
100Hz – 2kHz 3.3g
Operating temperature: -40 to +70°C
Relative Humidity: 0-70°C 95%
Storage temperature: -55 to +80°C
NOTES
1) De-rate by 12% if mounted in 'portrait' orientation.
2) With 4% engine governing.
3) After 2 minutes.
4) Generator de-rate may apply. Check with factory.
5) Factory set, semi-sealed, jumper selectable.
6) Any device connected to the analogue input must be fully floating (galvanically isolated from ground), with an insulation strength of 500V ac.
7) De-rate output current by 5% per degree C above 60C.
8) Non condensing.
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