Mx321 generator Automatic Voltage Regulator Avr
3 Phase Sensing Permanent Magnet Generator type voltage regulator is a compatible replacement for Newage MX321 and Onan 305-0823.
MX321 is a three phase sensed Automatic Voltage Regulator and forms part of the excitation system for a brushless generator.Excitation power is derived from a three phased permanent magnet generator(PMG),to isolate the AVR control circuits from the effects of nonlinear loads and to reguce radio frequency interence on the generator terminals.Sustained generator short circuit current is another feature of the PMG system.
The AVR sense the voltage in the main generator winding and controls the excitation to maintain the generator output voltage with the specified limits,compensating for load,speed,temperature and power factor of the generator.Thress phase RMS sensing is emplyed for superior voltage regulation.
Adjustable soft start circuitry is included to provide a smooth controlled build up of generator output voltage.
Sensing Input | Voltage | 190-264V ac max, 2 or 3 phase |
Frequency | 50-60 Hz nominal |
Power Input(PMG | Voltage | 170-220V ac max, 3 phase, 3 wire |
Current | 3A/phase |
Frequency | 100-120 Hz nominal |
Output | Voltage | Max 120V dc |
Current | Continuous 3.7 A, Intermittent 6A for 10 secs |
Resistance | 15 ohms minimum |
Regulation | +/- 0.5% RMS with 4% engine governing |
Thermal Drift | 0.02% per Deg. C change in AVR ambient |
Soft Staret Ramp Time | 0.4 - 4 seconds |
Typical system response | AVR response | 20ms |
Filed current to 90% | 80 ms |
Machine Volts to 97% | 300ms |
External voltage adjustment | +/-10% with 5k ohm 1 watt trimmer |
Under frequency protection | Set point | 95% Hz |
Slope | 100%-300% down to 30 Hz |
Max. Dwell | 20% volts/S recovery |
Unit power dissipation | 18 watts maximum |
Analogue Input | Maximum input | +/- 5 Vdc |
Sensitivity | 1v for 5% Generator Volts (adjustable) |
Input resistance | 1k ohm |
Quadrature Droop Input | 10 ohms burden |
Max. sensitivity: 0.22 A for 5% droop 0PF |
Max. input: 0.33A |
Environmental | Vibration | 20-100 Hz,50mm/se |
100Hz - 2kHz, 3.3g |
Operating temperature | -40 to +70 Deg. C |
Relative Humidity 0-70 Deg. C | 95% |
Storage temperature | -55 to +80 Deg. C |
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