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| Automatic Voltage Regulator MX321 AVR For Stamford | ||
| Sensing Input | Voltage | 100-264 V ac maximum |
| Frequency | 50-60 Hz nominal | |
| Phase | 2 or 3 | |
| Power Input | 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 (see note 1) | |
| intermittent 6A for 10 sec. | ||
| Resistance | 15 ohms minimum | |
| Regulation | +/- 0.5% RMS (see note 2) | |
| Thermal Drift | 0.02% per deg. C change in AVR ambient (see note 3) | |
| Soft Start Ramp Time | 0.4 - 4 seconds | |
| Typical system response | AVR response | 10ms |
| Filed current to 90% | 80 ms | |
| Machine Volts to 97% | 300ms | |
| External voltage adjustment | ±10% with 5k ohm 1 watt trimmer (see note 4) | |
| Under frequency protection | Set point | 95% Hz (see note 5) |
| Slope | 100-300% down to 30 Hz | |
| Max. Dwell | 20% volts/S recovery | |
| Unit power dissipation | 18 watts maximum | |
| Build up voltage | 4 Volts @ AVR terminals | |
| Analogue Input | Maximum input | ± 5 V dc (see note 6) |
| Sensitivity | 1v for 5% Generator Volts (adjustable) | |
| Input Resistance | 1k ohms | |
| Quadrature Droop Input | 10 Ohms burden | |
| Max. sensitivity: 0.22 A for 5% droop 0PF | ||
| Max. Input: 0.33 A | ||
| Current Limit Input | 10 Ohms burden | |
| Sensitivity range: 0.5-1 A | ||
| Over Voltage Detector Input | Set point: 300 V. Time delay: 1 sec (fixed) | |
| CB trip coil volts: 10-30 V dc | ||
| CB trip coil resistance: 20-60 ohms | ||
| Over Excitation Protection | Set point | 67 V dc +/-3% (fixed) |
| Time delay | 10-15 seconds (fixed) | |
| Environmental | Vibration | 20-100 Hz; 50mm/se |
| 100Hz – 2kHz; 3.3g | ||
| Operating temperature | -40 to +70°C | |
| Relative Humidity 0-70°C | 95% (see note 7) | |
| 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 degree C above 60C.
7.Non condensing.
Part Photos
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