Automatic Voltage Regulator

The SX440 positive voltage build up from residual levels is ensured by the use of efficient semiconductors in the power circuitry of the AVR. The AVR is linked with the main stator windings and the exciter field windings to provide closed loop control of the output voltage with load regulation of +/- 1.0%.

In addition to being powered from the main stator, the AVR also derives a sample voltage from the output windings for voltage control purposes. In response to this sample voltage, the AVR controls the power fed to the exciter field, and hence the main field, to maintain the machine output voltage within the specified limits, compensating for load, speed, temperature and power
factor of the generator.

AVR SX440 Stamford


 Features: Continue reading “AVR SX440”


Automatic Voltage Regulator

The MX341 AVR 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 nonlinear loads and to reduce radio frequency interference on the generator terminals. MX341 AVR E000-2412 to suit Stamford Newage Generator.


Technical Specification : Continue reading “AVR MX341”

Caterpillar VR6

Voltage Regulator

The Caterpillar VR6 voltage regulator is a widely used AVR (automatic voltage regulator) produced by the world famous Caterpillar brand.

Used with both Self-Excited (SE) and Permanent Magnet Excited (PME) generators.


  • Power on Shunt Excited Input: 180-280 Vac, 50/60 Hz, 1 or 3 phase
  • Power on PMG Excited input 63-105 Vac 100-240 Hz 3 phase
  • Sensing input: 180-280 Vac, 50/60 Hz 1 or 3 phase
  • CT input: 1 or 5 Aac 50/60 Hz
  • ACC input: +/- 3 Vdc. Output 65 Vdc @ 12 Adc
  • Unit Type: Potted – Rugged
  • Weight: 1.5 kg
  • Size: 9.4 in x 7.1 in x 3.5 in
  • 4 mounting holes


Continue reading “Caterpillar VR6”