MX321 AVR Automatic Voltage Regulators , 85-139V AC
MX321 is a three 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 non-linear loads and to reduce radio frequency interference on the generator terminals.
Three phase RMS sensing is employed for superior voltage regulation. Adjustable Soft start circuitry is included to provide a smooth controlled build up of generator output voltage.
A frequency measuring circuit continually monitors the shaft speed of the generator and provides under-speed protection of the excitation system by reducing the generator output voltage proportionally with speed below a pre-settable threshold. A further enhancement of this feature is an adjustable volts per Hertz slope and voltage recovery time, to improve the response of turbo charged engines.
Current limiting may be included to allow control over the amount of sustained short circuit current.
Maximum excitation is limited to a safe period by internal shutdown of the AVR output device. This condition remains latched until the generator has stopped.
The AVR includes an over-voltage protection feature with internal shutdown of the AVR output device, plus the ability to trip an optional excitation circuit breaker if required. Provision is made for the connection of a remote voltage trimmer, allowing the user fine control of the generator's output.
An analogue input is provided allowing connection to a Newage Power Factor controller or other external device with compatible output.
The AVR has the facility for droop CT connection, to allow parallel running with other similarly equipped generators.
Voltage: 190-264 AC max, 2 or 3 phase
Ferquency: 50-60Hz nominal
Voltage: 170-220 AC max, 3 phase, 3 wire
Frequency: 100-120Hz nominal
Voltage max: 120v DC
Current continuous: 3.7a
Intermittent: 6a for 10 secs
Resistance: 15 ohms minimun.