1.Generator AVR MX321
MX321 is a three phase sensed Automatic Voltage Regulator and forms part of the excitation system for a brush-less generator.
2.MX321 Technical specification:
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Sensing input
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voltage
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190-264V ac,2 or 3 phase
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frequency
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50-60 Hz nominal
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Power input(PMG)
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Voltage
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140-220V ac max, 3 phase, 3 wire
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Current
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3A/phase
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frequency
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100-120 Hz nominal
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output
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voltage
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Max 120V dc
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Current
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Continuous 3.7 A dc
Intermittent 6A for 10 secs
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resistance
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15 ohms minimum
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regulation
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+/- 0.5% RMS with 4% engine governing
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Thermal drift
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0.02% per deg. C change in AVR ambient
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Typical system response
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AVR response
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10 ms
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Filed current to 90%
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80 ms
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Machine volts to 97%
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300ms
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External voltage adjustment
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+/- 10% with 5 k ohm 1 watt trimmer
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Under frequency protection
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Set point
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95% Hz(see note 4)
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slope
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100-300% down to 30 Hz
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Max. Dwell
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20% volts/S recovery
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Unit power dissipation
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18 watts maximum
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ANALOGUE INPUT
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Maximum input
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+/- 5V dc
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Sensitivity
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1v for 5% Generator Volts (adjustable)
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Input resistance
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1k ohm
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QUADRATURE DROOP INPUT
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Max. sensitivity
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0.22 A for 5% droop 0PF
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Max. input
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0.33 A
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OVER EXCITATION PROTECTION
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Set point
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75 V dc
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Time delay
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8-15seconds (fixed)
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ENVIRONMENTAL
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Operating temperature
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-40 to +700C
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Storage temperature
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-55 to +800C
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