Transformer Rectifiers Dielectric Oil Filtration

Electrostatic Precipitator Rectifier Transformers
A typical precipitation will take 480 VAC, and with the assistance of a transformer/rectifier, convert the power to operate at a DC voltage. Cooling of the rectifier transformer is performed with oil or an oil/water heat exchanger. The Model F-480 is a perfect fit to keep the oil in the rectifier transformer clean and dry and in the proper condition for the rectifier transformer to operate properly.

Load Tap Changer Transformers
Load Tap Changer transformers supply a constant voltage under varying load conditions. The LTC changes the ratio of the transformer to compensate for voltage drops that occur as the load on the transformer changes. The LTC automatically adjusts the outgoing voltage of the transformer to within the specified limits while the transformer remains in full operation. Full and reliable operation is only possible with clean LTC oil.

Many Transmission and Distribution facilities have evaluated the use of filtration systems to continuously clean the oil within the load tap changer enclosure. The Transmission and Distribution facilities that have installed filters on their LTC transformers have experienced that efficient oil filtration is a contributing factor in extending maintenance intervals for a LTC. The FilterDyne F-480 is designed to provide the required filtration to keep and maintain the LTC oil. A LTC will eventually require maintenance to clean the oil, so it is to your benefit to permanently install a FilterDyne F-480 to provide this maintenance function.

The primary application where LTC transformer oil benefits from filtration are those with high "tap to tap" voltage differences or where the arcing contacts have accelerated erosion rates. In these cases, it is a high probability to see high levels of particulate and carbon, which contribute to degradation of the oil within the LTC compartment. The Kaydon F-480 can efficiently remove the metallic particulate and carbon from the oil with a .2 micron rated element, and prevent premature LTC failure due to oil deterioration.

In addition to the standard .2 micron filtration (Model FE-717-649), the F-480 offers other filtration choices:

• WaterLock - removes free & emulsified water, and some dissolved water. (Model FE-717-536)
• Fullers Earth - removes soluble contaminants and water that increase the oil´s Acid Number. (Model FE-717-538)
• Activated Alumina - removes acids & water more efficiently than F.E., produces ultra-dry oil. (Model FE-717-539)