A Stabiliser At Home...

If not too many of your fellow consumers also try to do this, you can use a "constavolt" type of transformer to regulate your voltage to a reasonably steady value. But if everybody attempts this, you will all be back to where you were before. Hopefully your utility can upgrade the capacity of the supply that feeds everybody.

Tornado, Constavolt are for DC.

SOLA makes a "Constavolt" transformer that is an AC device.

Found them at the third attempt, look expensive

In India at most places unitary type of air conditioners & refrigerators are usually installed along with voltage stabilizer to protect the compressor of the systems. Recently hermetic compressors are designed to withstand high voltage fluctuations and offer 7 year warranty.

But.. no1 answers my question then..how does it work?? narrating the sequence of events as it is turned on..(pls help me out)..

I have always believed transformers were inactive devices ..as they have no separate power source aiding them, so even if they vary the voltage, the power remains the same..kindly explain more on my question

Transformers are inactive but can be changed manually or with a motor drive.

A big 30 or 50 amp variac could also do the job. Big, heavy and expensive but the motor drive responds to voltage above or below setpoint. In power utility parlance we called them tap changers and then they get really big. Our power station had a couple rated for 2 megavar each. Probably cost $1 per var.

At the test lab I once worked at we used 30A variacs and adjusted them manually. Only saw the motor driven models in the catalog.

Biggest issue is the annual service work needed to clean the contactor points since these always switch under load. The oil bath must be filtered for carbon particles and the points resurfaced ( usually by hand ) we scheduled a whole day's outage for our smaller substations.

Think of it like that (so that we do not get into too much science...): the Transformer will draw more power from the grid to pump the voltage up and also supply the requiered power down stream. therefore, the rating of the transformer must be adequate to handle the required power demand down stream.

As tornado said, if everyone on that circuit does the same, the supply voltage will be depressed even further than when we started. BUT if the stabiliser has enough range handling, it will still be able (on everyones circuit) to correct the voltages.

The Stabiliser will suck in more power to be able to still give the required current at the required pressure (Volts) instead of giving more current at a depressed voltage. The Stabiliser will consume some of the power in the process...

Good exposition. The term "ferroresonant" was on the tip of my tongue, but I still didn't get there. I'm not sure if that is SOLA's technique, but have used them successfully in sizes around 100-250 VA as power supplies in PLC control panels. As Tony notes, they are a bit spendy.

I know some of you are going to say I`m wrong, but if you go to 220.com website, you will see a step up transformer that puts out a constant voltage. This transformer was built to combat very poor performance from electrical supplies in foreign countries, or anywhere else electric service is iffy. I have this regulator built into my 8,000 watt step up transformer. It guarantees you constant voltage minus or plus a very small amount.110volts in gives you 240 volts out, or vice versa. Voltage stays constant either way. I would say this would work fine for a single dwelling. Our military uses them a lot for some very sensitive equipment. Bob KC0VEA

AS a after thought, mine was 300.00 with free shipping. Very quiet also, and I run several ham radios with no problems.