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The first fault indicators were brought onto the market by Horstmann from Germany in 1946. The E. O. Schweitzer Manufacturing Company (now a division of Schweitzer Engineering Laboratories) introduced a product to the United States in 1948.
Schweitzer created the relay as a Ph.D. project while at Washington State University. He sold his first product, the SEL-21, to Otter Tail Power Company in Fergus Falls, Minnesota in 1984. Otter Tail initially used the SEL-21 for its fault location and event recording functions. In 1985, SEL built its first building and employed eleven people.
Schweitzer and his wife Beatriz are active philanthropists. They support numerous causes related to education and caring for those in need. For example, in 2018, they pledged 3 million dollars to their Alma Mater, Purdue. $1.5 million going to the School of Electrical and Computer Engineering to endow a professorship, and another $1.5 million ...
In electrical engineering, a protective relay is a relay device designed to trip a circuit breaker when a fault is detected. [ 1 ] : 4 The first protective relays were electromagnetic devices, relying on coils operating on moving parts to provide detection of abnormal operating conditions such as over-current, overvoltage , reverse power flow ...
Here's how to pinpoint when you're actually in this phase of life even if your symptoms (hot flashes, mood swings, stress, dryness) are nonspecific.
Fault detection, isolation, and recovery (FDIR) is a subfield of control engineering which concerns itself with monitoring a system, identifying when a fault has occurred, and pinpointing the type of fault and its location. Two approaches can be distinguished: A direct pattern recognition of sensor readings that indicate a fault and an analysis ...
Your cholesterol levels, good or bad, serve as an indicator of heart health. But, a recent study shows that if your levels are consistently all over the place, you may be at greater risk for ...
Canadian hockey player Matthew Petgrave has begun crowdfunding to help cover his legal fees in connection with the death of fellow hockey player Adam Johnson.