MX321 AVR / Alternator Regulator

MX321 AVR is a three phase sensed automatic voltage regulator and is part of the excitation system for a brushless 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.

Our product senses the voltage in the main generator winding and controls the excitation to maintain the generator output voltage within the specified limits, compensating for load, speed, temperature and power factor of the generator.

Technical Parameters

Note
1. De-rate linearly from 3.7A at 50°C to 2.7A at 70°C.
2. The stated voltage regulation may not be maintained in the presence of certain transmitted radio signals. Any change inregulation will fall within the limits in Criteria B of BS.EN.61000-6-2: 2001.
3. After 10 minutes.
4. Applies to Mod status E onwards. Generator de-rate may apply. Check with factory. 5. Factory set, semi-sealed, jumper selectable.
6. Any device connected to the analogue input must be fully floating (galvanically isolated from ground), with an insulation strength of 500VAC.
7. Non condensing.

A frequency measuring circuit is adopted by this AVR, and it continually monitors the shaft speed of generator and provides under-speed protection of the excitation system by reducing the generator output voltage proportionally with speed below a pre-settable value. A further enhancement of this feature is an adjustable volt per hertz slope and voltage recovery time, which can improve the response of turbo charged engines.

Three phase RMS sensing is employed for superior voltage regulation, and adjustable soft start circuitry is included to provide a smooth controlled build up of generator output voltage. This product includes an over-voltage protection feature with internal shutdown, plus the ability to trip an optional excitation circuit breaker if required.

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 output device. This condition remains latched until the generator has stopped.

On the other hand, provision is made for the connection of a remote voltage trimmer, allowing the fine control of the generator's output. Meanwhile, an analogue input is provided allowing connection to a Newage power factor controller or other external device with compatible output. In addition, this alternator regulator has the facility for droop CT connection, to allow parallel running with other similarly equipped generators.

Dingol is a professional AVR / alternator regulator manufacturer and supplier in China. We provide a comprehensive range of products, including alternator voltage regulator, 2-pole brushless AC generator, diesel alternator, synchronous generator, and more.

Related Names
Voltage Measuring Device | Constant Voltage Regulation Parts | Current Voltage Modulation Tool