Automatic Voltage Regulators - AVR & DSR

AVR (Automatic Voltage Regulator & DSR (Digital Automatic Voltage Regulator) 

What is an AVR or DSR?

An automatic voltage regulator (AVR) is a solid state electronic device for automatically maintaining generator output terminal voltage at a set value. It will try to do this as the generator load changes. The AVR is part of the alternator's excitation system.

How does an AVR work?

It controls output by sensing the voltage from the generator terminals and comparing it to a stable reference. The error signal is then used to adjust the field current by increasing or decreasing the current flow to an exciter stator, which in turn will lead to a lower or higher voltage at the main stator terminals.

What happens if a generator AVR fails?

If the AVR on your generator fails, then the generator will lose excitation. This loss of excitation will cause the voltage to fall suddenly at the generator and this loss of voltage should cause the generator to shut down on an under-voltage fault.

If your generator does not have an under-voltage protection set, then the generator may continue to run, which could cause severe damage to your equipment.

What AVR or DSR does my Model Generator have?

Note: Any model number listed above with an asterisk (*) must be programed prior to shipment

What does it look like on our Eco Power Equipment?