1.AVR AS440
AS440 is a half wave phase controlled thyristor type AVR and forms part of the excitation system for a brushless generator. The design employs Surface Mount Technology (SMT) for high integration of features in a small footprint AVR.
2.AVR AS440 Technical specification:
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Technical specification |
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Sensing input |
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voltage |
Jumper selectable.100-130 Vac 1 phase or 190-264 Vac 1 phase |
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frequency |
50-60 Hz nominal |
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Power input |
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Voltage |
100-264 V ac 1 phase |
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frequency |
100-120 Hz nominal |
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output |
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voltage |
82 V d.c. @ 200 V a.c. |
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Current |
Continuous 4 A dc. transient 7.5A for 10 secs. |
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resistance |
15 ohms min |
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regulation |
+/- 1.0% (see note 1) |
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Thermal drift |
0.03% per deg. C change in AVR ambient |
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Typical system response |
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AVR response |
20 ms |
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Filed current to 90% |
80 ms |
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Machine volts to 97% |
300ms |
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External voltage adjustment |
+/- 10% with 1 k ohm 1 watt trimmer |
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Under frequency protection |
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Set point |
95% Hz(see note 4) |
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Unit power dissipation |
12 watts maximum |
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ANALOGUE INPUT |
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Maximum input |
+/- 5V dc |
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Sensitivity |
1v for 5% Generator Volts (adjustable) |
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Input resistance |
1k ohm |
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QUADRATURE DROOP INPUT |
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Max. sensitivity |
0.07 A for 5% droop 0PF |
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Max. input |
0.33 A |
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OVER EXCITATION PROTECTION |
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Set point |
65 V dc |
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Time delay |
10-15 seconds (fixed) |
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Build up voltage |
4 volts @ AVR terminals |
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