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 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.
• The AVR senses the voltage in the main generator
  winding and controls the power fed to the exciter stator
  and hence the main rotor to maintain the generator output
  voltage within the specified limits, compensating for load,
  speed, temperature and power factor of the generator.
  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 to improve
  engine recovery time on turbo charged engines. Soft start
  circuitry is included to provide a smooth controlled build
  up of generator output voltage.
• Uncontrolled excitation is limited to a safe period by
  internal shutdown of the AVR output device. This
  condition remains latched until the generator has
  stopped.
• 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 devices
  with compatible output.
• The AVR has the facility for droop CT connection, to allow
  parallel running with other similarly equipped generators.

• All manufacturer names and numbers are used for reference purpose only and do not imply that any part is the product of these manufacturer.