Stamford AVR AS480

Product Name : Stamford AVR AS480
Product ID : AS480
MOQ : 5pcs
Packaging : Individual packing or neutral packing
Delivery time : about 3 working days
Payment terms : T/T,West Union,Paypal
Supply ability : 3000pcs/month

Stamford AVR AS480,AS480 avr for stamford

The AS480 is a half wave phase controlled AVR which forms part of the excitation system of the brushless generator. The design employs Surface Mount Technology (SMT), custom mouldings and heatsinks to produce a compact AVR assembly. The AVR also incorporates an interface to the optional Excitation Boost System (EBS) for use where short-circuit current maintenance is required.

Sensing and power input
Voltage   100-264 V ac 1 phase
Frequency  50-60 Hz nominal
Voltage  82 V d.c. @ 200 Va.c power input.
Voltage  45 V d.c. @ 110 Va.c power input.
Current     continuous 5A (see note 1).
                transient 7.5A for 10 secs.
Resistance   15 ohms min
+/- 1.0% (see note 2)
Thermal drift 0.03% per deg. C change in AVR ambient (see note 3)
Typical system response
AVR response   20ms
Field current to 90%   80 ms
Machine Volts to 97%   300ms
External voltage adjustment
+/-10% with 1 k ohm 1 watt trimmer (see note 4)
Increasing resistance lowers voltage.
Fixed 15kOhm resistor enables 110V sensing
Under frequency protection
Set point   94 -98% Hz (see note 5)
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)
Vibration     20-100 Hz 50mm/sec
                 100Hz – 2kHz      3.3g

Operating temperature    -40 to +70C (note 6)
Relative Humidity 0-70C   95% (note 7)
Storage temperature   -55 to +80C
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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