Automatic Voltage Regulator (Mx341)

Automatic Voltage Regulator (MX341) is a two phase sensed Automatic Voltage Regulator and forms part 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 nonlinear 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, 1 phase, 2 Wire
Frequency : 50-60 Hz nominal
2. Power Input(MG):
Voltage : 140-220V ac max, 3phase, 3wire
Current: 3A/phase
Frequency : 100-120 HZ nominal
3. Output:
Voltage : max 120V dc
Current : continuous 2.7A; Intermittent 6A for 10 secs;
Resistance : 15 ohms minimum
4. Regulation: +/- 1%
5. Thermal drift: 0.03% per deg. change in AVR ambient
6. Soft start ramp time: 3seconds
7. Typical system response:
AVR response : 10ms
Filed current to 90% : 80 ms
Machine Volts to 97% : 300ms
8. External voltage adjustment: +/-10% with 1 k ohm 1 watt trimmer
9. Under frequency protection:
Set point : 95% Hz
Slope : 170% down to 30 Hz
10. Unit power dissipation: 12 watts maximum
11. Analogue input:
Maximum input : +/-5Vdc
Sensitivity : 1V for 5% Generator Volts
Input resistance : 1k ohm
12. Quadrature droop input:
10 ohms burden
Max. sensitivity: 0.07 A for 5% droop 0PF
Max. input: 0.33A