MX321 is a three phase sensed Automatic Voltage
Regulator and forms part of the excitation system for a
brush-less generator. Excitation power is resulting from a
three-phase permanent magnet generator (PMG), to
separate 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.

The AVR senses the voltage in the foremost generator winding
and controls the excitation to keep the generator output
voltage within the specified limits, compensating for load,
velocity, temperature and power factor of the generator.
Three phase RMS sensing is employed for advanced
voltage regulation.

SENSING INPUT

> 190-264V ac max, 2 or 3 phase

> 50-60 Hz nominal

POWER INPUT (PMG)

> 170-220V ac max, 3 phase, 3 wire

> 3A/phase

> 100-120 Hz nominal

OUTPUT

> Voltage max 120V dc

> Current continuous 3.7 A

> Intermittent 6A for 10 secs.

> Resistance 15 ohms minimum