This magnificent Italian manufactures automatic voltage regulator has been designed for use with the Marelli Motori synchronous generators. Most generators need AVR to stabilise the voltage as the load on the generator changes. It ensures that there are no huge fluctuations in the voltage that will damage many machines. This modern solid state device is a feedback control system that measures the output voltage of the generator and compares the output to a set point. It generates a signal that is used to adjust the excitation of the generator. As the excitation current in the field winding of the generator increases its terminal voltage will increase. The automatic voltage regulator controls current by using power electronics devices. Where a generator is connected in parallel with other sources changing the excitation has more effect on the reactive power produced by the generator than on the terminal voltage.
Benefits and specifications of the M16FA 655A Marelli Automatic Voltage Regulator
The automatic voltage regulator is fully insulated in order to maintain high reliability even with severe ambient conditions like high humidity, dust and a salty atmosphere. It also copes very well with high levels of vibration. This regulator can be used on both single and 3-phase generators. It has a power supply voltage for between 170 and 277 volts with a 10 range of tolerance at 50 or 60 Hertz. The maximum continuative field current is 5 amps and the maximum forcing field current is 8 amps. Maximum field voltage is 100 volts and the field resistance is between 8 and 20 Ohms. At steady state condition with balanced and non deforming load and constant frequency it has a regulation accuracy of around 0.5. It can operate in temperatures of between -30 degrees Celsius up to 70 degrees Celsius and weighs only 320 grams.
Function and Protection features of the M16FA 655A Marelli Automatic Voltage Regulator
This quality automatic voltage regulator has an underfrequency limiter and an over excitation limiter to protect it. An internal fuse also protects the AVR and is easily replaceable in case of excess power which may blow it. It is regulated by an external potentiometer which can set certain parameters. The manual comes with wiring diagrams to enable easy installation. This machine has a very wide range of settings to protect against damage to the generator.