Voltage Drops

http://www.nrgsystems.com/FileLibrary/5bff08e2113c4001973e0f5568687055/A-22498.pdf

Depending on the load required for individual areas or machines or instruments, you could go for an old-fashioned motor-generator set, or an uninterruptible power supply. These systems come in all kinds of shapes and sizes, and provide a good source of stable reliable energy and require little maintenance.

To solve your issue it depends on the load of the machinery you connect and on the local code.

If the power is in the range of around max 30kW, buy a variable transformer (search under "variac" in the web) Such kind of transformers are available in the market forinstance from http://instrumentation-central.com/Pages/variable_transformers.htm

There are units available which would be able to handle currents up to 540A. But this solution is might be costly.

If you can buy / get hold of a 220V to 0 - 40Volts Variable transformer but "Primary" must be well isolated from Secondary winding! (Very important a so called "autotransformer" can not be used it must be isolated! - or cause damages!) and with a rating of 5kVA - the solution is easier.

These variacs are relative cheap to buy in China / India as these countries have the same voltagedrop issue. You connect the secondary side of this transformer between the mains input phase and your inhouse systems Phase (Or better to understand - you add a variable voltage of 0 to 40 Volts to the incoming mains voltage) Then you only have to control this voltage: if the mains input is 220 you set the trafo output voltage to 0V. If mains in is only 180V - You need to set the trafo to 40 Volts to get again 220V.

There are units available which have an electronic control and are motordriven to maintain the preset output voltage. One requirement is that the load is relative constant. With a 5 kVA rating of the variac you should be able to handle 30KVA of load in your business. By the way this solution we needed to use also in Germany with an excellent power grid to compensate for losses on the long wires of the incomming mains for a remote station and a variable load.

Other trick would be an autotransformer with taps where you compensate the voltage drop by either a motor driven contact on the outside of the winding and maintain the output voltage. But this would be much more copper and expensive.

Hope this was helpfull

Your technical information regarding voltage drops, has been very useful. Thank you very much!

Since it is a problem of voltage drop and only your small manufacturing facility that is concerned,buy and install a suitable/sizable industrial voltage stabilizer.this has worked perfectly for so many people experiencing same problem.I installed some myself.

Patrick Whowha

Thanks a lot for your comments. Is there a commercial denomination of such 'industrial voltage stabilizer'? or I can find it only with that description?

Could it be similar to a set of capacitors?

Antorone,

Not like capacitors. The best constant-volage transformer design uses principles from an electrical engineer, Sola. He started a company with the same name, and they are still doing well. By saturating the magnetic field of the transformer, the primary/secondary turns ratio is overcome and the output voltage can be constant with a variation of 30% and more on the input voltage. Other benefits of this approach include filtering out of electronic noise and nearly all harmonics (if I remember my readings correctly).

--JMM

You Can use a CVT Constant Voltage Xformer on each machine that can be damaged by the drop! Works well did it in Peru

Here are a couple of solutions, one tried one not.

The tried one, works very well, ABB (previously Vectek of New Zealand):

https://new.abb.com/

The untried one:

http://www.ashleyedison.com/

CVT (constant voltage transformer) is your solution.