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MX321 AVR Automatic Voltage Regulators , 85-139V AC

Place of Origin China OEM and USA
Brand Name GSKA
Model Number MX321
Minimum Order Quantity 1-5 pieces
Price Negotiable
Packaging Details Standard plywood and wood package.the actual package size against goods size and handle requires.
Delivery Time one weeks on receipt of official sales contract
Payment Terms L/C,D/P,D/A, Alipay, West Union, TT. Cash,Paypal
Supply Ability 500 pieces per Month

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Product Details
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avr automatic voltage regulators


automatic voltage regulator circuit

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Product Description




MX321 AVR Automatic Voltage Regulators , 85-139V AC


  1. Model Number :MX321
  2. Voltage: 190-264 AC max, 2 or 3 phase
  3. Ferquency: 50-60Hz nominal
  4. Power input(pmg)
  5. Voltage: 170-220 AC max, 3 phase, 3 wire
  6. Current: 3a/phase
  7. Frequency: 100-120Hz nominal


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.


Sensing input

Voltage: 190-264 AC max, 2 or 3 phase

Ferquency: 50-60Hz nominal

Power input(pmg)

Voltage: 170-220 AC max, 3 phase, 3 wire

Current: 3a/phase

Frequency: 100-120Hz nominal


Voltage max: 120v DC

Current continuous: 3.7a

Intermittent: 6a for 10 secs

Resistance: 15 ohms minimun.