The Leroy Somer AVR R731 is an analogic Automatic Voltage Regulator with transistor.The voltage sensing is done with three 24VA single phase transformers.The R731 module is designed to be installed vertically next to the voltage regulator.
Functionality/Compatibility of the R731 Leroy-Somer Automatic Voltage Regulator
The Leroy-Somer R731 module, additional to having the all industry standard AVR funtions , it features a Three Phase Inspection Controller, which consist of the Intelligent controller, single phase controller and the Three Phase Inspection Controller. The regulator is comaptible with the R438, R448, R449 single phase sensing voltage regulators.
Reasons for using the R731 Leroy-Somer Automatic Voltage Regulator
Power generators, as ones used by standby power systems, will have automatic voltage regulators to stabilise their voltages as the load on the generators fluctuates. Originally, AVRs for generators were electromechanical in nature, but a modern AVR uses solid-state devices. An AVR acts as an feedback control system that gauges the output voltage of the generator, compares that output to a set reference point, and generates an error 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 AVR will control current by using power electronic devices; generally a fraction of the generator’s output is used to feed current for the field. Where a generator is connected in parallel with other sources such as an electrical transmission grid, changing the excitation has more of an effect on the reactive power produced by the generator than on its terminal voltage, which is mostly set by the connected power system.