Projects

A large Southeastern utility company needed to replace the water coolers at an aging electric generating plant. Built in 1948, the plant’s six identical Westinghouse Generator Step-Up power transformers were fully operational, with all active parts still in very good condition. The twin water coolers attached to each unit, however, did not hold up as well. Over time, parts on the coolers had oxidized and began leaking.

....More

The onsite power generation station and the 90-MVA Moloney electric transformer, built in 1958, were installed halfway up the mountain slopes. With continuous load growth, the transformer was operating well above the nameplate recommendations. The single 5-hp oil pump and the three 1-hp fans on each of the four traditional oil coolers were not providing adequate cooling. The onsite operations manager of the generation station told us, “The coolers were not cooling at all. They were plugged or the fluid was passing through too quickly to cool.” Mountain States Transformers (MST), who maintained the transformer, said “The coolers were fouled and the oil temperature was hitting the warning trips often.”

....More

The coal fired generation plant has a 128MVA transformer rated to operate with a top oil temperature of 65°C. The cool-ers on the transformer had corroded and were leaking oil. The drip pan was continuously filling up and the oil level in the transformer would quickly drop to make the transformer non-operational. Due to the age and extent of the corrosion, the coolers were beyond the scope of repair and had to be replaced.

....More

Nucor OFAF Reactor Coolers

The coal fired generation plant has a 128MVA transformer rated to operate with a top oil temperature of 65°C. The cool-ers on the transformer had corroded and were leaking oil. The drip pan was continuously filling up and the oil level in the transformer would quickly drop to make the transformer non-operational. Due to the age and extent of the corrosion, the coolers were beyond the scope of repair and had to be replaced.

....More