Stamford Automatic Voltage Regulator - AVR AS480
- Stamford
- UK
- 7 days
- 1000 sets
The AS480 is an analogue, 2-phase sensing, self-excited automatic voltage regulator (AVR) incorporating an interface for the optional Excitation Boost System (EBS) for improved motor starting performance and sustained short circuit.
The AS480 is provided as standard on STAMFORD P0 and P1 alternators.
The AS480 is an analogue, 2-phase sensing, self-excited automatic voltage regulator (AVR) incorporating an interface for the optional Excitation Boost System (EBS) for improved motor starting performance and sustained short circuit.
The AS480 is provided as standard on STAMFORD P0 and P1 alternators.
Technical specification:
SENSING INPUT
Voltage: 100-264V ac max, 1 phase
Frequency: 50-60 Hz nominal
OUTPUT
Voltage: 82 V d.c. @ 200 Va.c power input
Voltage: 45 V d.c. @ 110 Va.c power input
Current: continuous 5 A, transient 7.5A for 10 secs
Resistance: 15 ohms minimum
REGULATION
+/- 1%
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
Fixed 15kOhm resistor enables 110V sensing
UNDER FREQUENCY PROTECTION
Set point: 94-98% Hz
UNIT POWER DISSIPATION
12 watts maximum
BUILD UP VOLTAGE
4 Volts @ AVR terminals
QUADRATURE DROOP INPUT
10 ohms burden
Max. sensitivity: 0.07 A for 5% droop 0PF
Max. input: 0.33 A
OVER EXCITATION PROTECTION
Set point: 67 Vdc +/-3% (fixed)
Time delay 10-15 seconds (fixed)
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 20% if mounted external to generator;
2) Inclusive of 4% engine governing;
3) After 2 minutes warm-up;
4) Generator de-rate may apply. Check with factory;
5) Factory set, semi-sealed, jumper selectable;
6) De-rate output current by 5% per deg. C above 60C;
7) Non condensing.
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