Automatic Voltage Regulator (Mx321)

Automatic Voltage Regulator (MX321) is a three phase sensed Automatic Voltage Regulator and forms art of the excitation system for a brush-less generator. Excitation power is derived from a three-phase permanent magnet generator (PMG), to isolate the AVR control circuits from the effects of non-linear loads and to reduce radio frequency interference on the generator terminals. Sustained generator short circuit current is another feature of the PMG system.
1. Sensing Input:
Voltage : 190-264V ac max, 2or 3 phase
Frequency : 50-60 Hz nominal
2. Power Input(MG):
Voltage : 170-220V ac max, 3phase, 3wire
Current: 3A/phase
Frequency : 100-120 HZ nominal
3. Output:
Voltage : max 120V dc
Current : continuous 3.7A; Intermittent 6A for 10 secs;
Resistance : 15 ohms minimum
4. Regulation: +/- 1%
5. Thermal drift: 0.02% per deg. change in AVR ambient
6. Soft start ramp time: 0.4 - 4seconds
7. Typical system response:
AVR response : 10ms
Filed current to 90% : 80 ms
Machine Volts to 97% : 300ms
8. External voltage adjustment: +/-10% with 5 k ohm 1 watt trimmer
9. Under frequency protection:
Set point : 95% Hz
Slope : 100% - 300% down to 30 Hz
Max Dwell : 20% volts/S recovery
10. Unit power dissipation: 18 watts maximum
11. Analogue input:
Maximum input : +/-5Vdc
Sensitivity : 1V for 5% Generator Volts
Input resistance : 1kohm