Automatic voltage regulator Stamford AVR AS440
High quality replacement model for Stamford AVR AS440 with reasonable price!
Replacement Models:AS440, AS480, SX440, SX460, MX341, MX321, MX450
Original Modules: AS440, AS480, SX460, MX341, MX321, MX450, MX342, MX330, EBC-1, RSK1001, RSK2001, RSK5001, RSK6001
The Brands mentioned here are for reference purpose only, our parts can exactly replace the original ones.
STAMFORD AS440 AVR
is used in
Stamford Cummins UC224 or UC274 generators
. The AS440 offers an optional feature for paralleling with multiple generators.
AS440 is a half wave phase controlled thyristor type AVR and forms part of the excitation system for a brush-less generator. The design employs Surface Mount Technology (SMT) for high integration of features in a small footprint AVR.
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Technical specification |
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Sening input |
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Voltage |
Jumper selectable 100-130V ac 1 phase or 190-264V ac 1 phase |
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Frenquency |
50-60Hz nominal |
| Power input |
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Voltage |
100-264V ac 1 phase |
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Frequency |
50-60Hz nominal |
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Output |
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Voltage |
82V dc @200V ac |
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Current |
continuous 4A transient 7.5A for 10 secs |
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Resistance |
15 ohms min (10 ohms min when input volts i s less than 175ac) |
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Regulation |
+/-1.0% |
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Thermal Drift |
0.03% per deg. C change in AVR ambient |
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Typical System Response |
AVR response 20ms Field current to 90% 80ms Machine Volts to 97% 300ms |
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External Voltage Adjustment |
+/-10% with 1 k ohm 1 watt trimmer Increasing resistance lowers voltage |
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Under frequency Protection |
Set point 94-98% Hz |
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Unit power Dissipation |
12 watts maximum |
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Build Up Voltage |
4 Volts @ AVR terminals |
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Analogue input |
Maximum input +/-5V dc Sensitivity 1V for 5% Generator Volts(adjustable) input resistance 1k ohm |
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Quadrature Droop input |
10 ohms burden Max. sensitivity: 0.07A for 5% droop 0 PF Max. input: 0.33A |
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Over Excitation protection |
Set point 75V dc Time delay 10-15 seconds(fixed) |
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Environmental |
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Vibration |
20-100Hz 50mm/sec 100Hz-2kHz 3.3g |
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Operating temperature |
-40 to +70C |
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Relative Humidity 0-70C |
95% |
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Storage temperature |
-55 to +80C |
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Notes |
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1. De-rate by 12% if mounted in portrait orientation. |
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2. With 4% engine governing. |
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3. After 2 minutes. |
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4. Generator de-rate may apply. Check with factory. |
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5. Factory set, semi-sealed, jumper selectable. |
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6. Any device connected to the analogue input must be fully floating(galvanically isolated form ground), with an insulation strength of 500V ac |
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7. De-rate output current by 5% per degree C above 60C. |
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8. Non condensing |
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