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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 ...
SEL was founded in Pullman, Washington in 1982 when Dr. Edmund O. Schweitzer III invented and marketed the first all-digital protective relay. 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 ...
"Overcome Wetting Voltage and Current Limitations With an External Wetting Power Supply" (PDF) (Application note). Schweitzer Engineering Laboratories, Inc. (SEL). AN20 16-01; Paton, Kevin (2011). The Test, Usage and Maintenance of Power Switching Subsystems (PDF). North Reading, MA, USA: Teradyne, Inc. / IEEE. ISBN 978-1-4244-9363-0
Digital/numerical relays provide a front panel display, or display on a terminal through a communication interface. This is used to display relay settings and real-time current/voltage values, etc. More complex digital relays will have metering and communication protocol ports, allowing the relay to become an element in a SCADA system.
The Bard–Schweitzer approximation estimates the average number of jobs at node k to be: [1] [7] () which is a linear interpolation. From the above formulas, this approximation yields fixed-point relationships which can be solved numerically. This iterative approach often goes under the name of approximate MVA (AMVA) and it is typically faster ...
Cortese said about 5% to 7% of children and 2.5% of adults worldwide have ADHD, which stems from underdeveloped or impaired executive function and self-regulation skills, according to Harvard ...
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Jonathan Sykes is an Engineering Services Manager at Schweitzer Engineering Laboratories (SEL) in Albuquerque, New Mexico.Sykes graduated from the University of Arizona in 1982 and since that time has worked in electric power industry at System Protection and Test and at Pacific Gas and Electric Company in San Francisco, California, where he also served as senior manager.