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PERMANENT MAGNET GENERATOR TYPE AUTOMATIC VOLTAGE REGULATOR (“M” PREFIX)

For the ultimate in control, an AVR designed to operate with the STAMFORD Permanent Magnet Generator (PMG) system is often specified. In this design, the AVR receives its power from a separate source in the form of a small PMG, mounted on the end of the main generator shaft.

The advantage of this is the AVR power source is not affected by sudden loads applied to the generator, hence the excitation remains at full strength, providing superior motor starting and short circuit performance.

MX341

The MX341 achieves voltage regulation of ±1.0%, through the use of the PMG system. Protection against sustained over-excitation is standard on this AVR, as is a special engine relief load acceptance feature which enables full load to be applied in a single step.

MX321

The MX231 has all the features of the MX341, additionally achieving voltage regulation of 0.5% with 3 phase RMS sensing, built in overvoltage protection and optional short circuit current level adjustment.

The combination of PMG providing an isolated power source and the MX321 s RMS sensing makes an ideal arrangement for supplying the non-linear loads such as supplies for computers or variable speed motors etc.

PRODUCT FEATURES SUMMARY

STAMFORD ac generators can be configured to meet practically every application requirement. This summary chart shows the main features of the product ranges.