An AVR primarily functions by controlling the generator output voltage.It accomplishes this task by first sensing the voltage from the generator terminals, and then comparing the same to the preset stable reference value to check for the error signal, if any. In case of a discrepancy between the two, the ACR adjusts the field current by increasing or decreasing the current flow to an exciter stator. This, in turn, ensures a lower or higher voltage, respectively at the main stator terminals.

As you may have understood by now, the AVR works as an adjustment device that ensures that the voltage output of the generator remains within a predefined range. Consequently, it makes sure that the generator voltage never drops as low as to result in the malfunctioning of any connected electrical equipment or electrical devices. It also helps save the generator from an insufficient battery charge.

The adjustment of the generator output becomes essential when the speed of the generator changes – this largely happens when the speed of the generator engine changes, as a result of the transmission ratio of the generator to the engine being fixed. A stable voltage during this time ensures the safe functioning of both – the electrical equipment that the power is being supplied to, as well as the generator battery.

 

An Automatic Voltage Regulator (AVR) is an electronic device designed to regulate and stabilize the output voltage of a generator or any other power source. It works by continuously monitoring the output voltage and adjusting it to maintain a steady voltage level within an acceptable range. AVR acts as a safeguard against voltage fluctuations, ensuring that electrical equipment receives the required voltage for optimal performance and protection against damage.

 

 

How to Tell If Your Generator AVR Is Giving Up?

Since AVR makes it possible for a generator to deliver stable power; if it malfunctions, impacts will be significant. Recognizing AVR-related issues at an early stage can help you save money on costly generator repairs in the future. Listed below are a few signs that suggest an AVR issue in a generator.

Sign #1- Unstable terminal voltage

This is the first thing that you will notice if there is something wrong with your generator’s AVR. After all, it’s the job of AVR to prevent terminal voltage fluctuation in a generator. So, if your generator’s voltage output has been fluctuating for quite a while, it is important that you have someone check its AVR. If there is something wrong with the component, have it repaired or replaced.

Sign #2- Generator not producing power

There are many different things that can cause a generator to not produce any electricity; the prominent one being a faulty AVR. As we already have discussed, AVR is a part of the alternator’s excitation system. If there is something wrong with the alternator or any part of its excitation system, the generator will not produce any electricity even when running at its peak speed. In any case, if you are dealing with such a problem, it is important that you get your generator AVR tested by a certified professional.

Sign #3- Instrument cluster failure

Has your generator’s instrument cluster been acting up lately? If so, there is every possibility that the AVR is not working as it should. Due to a fault in the instrument cluster, it will be very difficult to obtain information such as fuel load, pressure, and other important generator operation parameters. To prevent something like this from happening, you should keep an eye on your generator AVR. If you suspect a problem, consult with a technician.As aprofessional manufacturer for Diesel Generator Sets Guangxi Dingbo Power Equipment Manufacturing Co.,Ltd will help you find the problem.

 

Generator AVR Failure: Most Common Reasons

There are many different things that could lead to automatic voltage regulator failure in a generator. Some of them are listed below, please have a look;

- Electric short circuit

- Bad wire or a damaged fuse

- Generator overloading

- Unexpected electricity spike

 

Whatever the reason may be… if your generator’s AVR is not working as it should, you should be quick to take action. Find out what is wrong with the AVR and why it is acting strangely.

 

To Be Brief…

An automatic voltage regulator, as the name implies, is a solid-state electronic device responsible for keeping the terminal voltage of the generator stable. If the AVR malfunctions due to an electric short circuit, overloading, or any other reason, the generator will not operate as it should. Plus, a faulty AVR can contribute to expensive generator repairs down the road. Looking after your generator’s AVR is therefore important.