Battling Voltage Fluctuations

Maybe something like this may help.

http://www.controleng.com/article/CA509802.html

Also Google for Regulators.

ABB may can help you (varene, montreal) It"s call a clycloconverter. You take your voltage, pull it down and remodule it to the voltage no need. It"s a lot of troubles but depand of what of industruie your working for, that a solutions. MOTOROLA is the one you devellope the concept, Look that way>

Motorola

PWM

Cycloconverter

dam that"s expensive

There r many good solutions. U first need to havea couple of blanks filled in.

What is the amperes max. load.What is the highest loads ?resistive/inductive?

A squirrel cage motor can help. A auto capacitor bank can help.The list goes on but we need to know the loads.What are the cable sizes?

Well get back & we can do some math 4 u.Where do u live?

Hi,

You will find that a VSD (variable speed drive) unit will overcome this effect as it will maintain the output over an input variation of up to 15%. You will find also that the application of the VSD will also improve the power factor to the individual drives enablig them to function more efficiently and probably enabling you to set the exact speed that the machine needs to operate at. You will therefore be able to recover the cost of the VSD installation( payback will be a function of hours runX energy saved)., also overcoming the effects of the sagging voltage. Look at Toshiba/ Danfoss/ Honeywell GE web sites for detailed info.

Good luck.

Before you spend any money on equipment to "fix" a problem may I suggest running a power analyzer with data logging for a week or two. Brand names such a Dranatz and Fluke offer suitable equipment. In a past career I worked as an engineering tech for a power utility company. My job was to respond to complaints from users. We rented Dranatz datalogger/ analyzers as needed. Quite often we discovered the real cause of problems to be something other than what customers own engineering people "thought" was the problem. A brand new hotel complex was built and I found out they had sophisticated data logging of their own. On more than one occasion I correlated their data with our own SCADA system data to pinpoint fault origin that knocked out the whole area.

Are you in the US? You may want to have an infrared inspection done. Infrared helped us find issues with our system. The guy we use is really good. www.steponesolutionsllc.com

you can email me for his direct number cbiele11@yahoo.com

Chris

Hi Guys,

The real problem is the supply, we have had the opportunity to isolate the entire facility from the utility supply and measure what is coming into the facility with absolutely no loads, the sags and unbalance are from the utility.

The VSD will help by only providing the energy required for the required load at any point in time, however these motors are run continuously at approximately 80 to 90 percent of rated capacity (this is what I'm told from site personnel), there are some applications where the implementation of a VSD is not practical and then there is the rest of the facility.

For me the real solution is for the utility to sort our their problems but this will not happen so the next best thing is for the customer to implement a solution at the point of entry/connection of the utility in order to protect their facility. I believe the solution lies with a transformer and maybe capacitors but I need some details or to be guided in the right direction.

Thanks again.