Model OLTC Series - Online Tap Changer Filters Brochure

The OLTC series of online tap changer filters is used to remove particulate and water from insulating or dielectric oils in a load tap changer. It is designed to be permanently attached to a oil filled electrical device such as tap changers, transformer, or circuit breakers. With the use of a suitable cartridge acids can also be removed from the oil.The OLTC filter is controlled by a micro PLC whose operation can be optimized be the user for individual tap changers.This is the first stage required to remove the solid contamination. The filtered oil is fed into a vacuum chamber where, due to the reduced pressure above the liquid, dissolved water is vaporized. The reduced pressure also facilitates the removal of any entrained gases in the oil.