Abstract: This paper presents the test results of an ultrafast (less than 2 ms) medium-voltage hybrid dc circuit breaker prototype that consists of three switching devices: a 15-kV silicon carbide ...

Abstract: High-voltage direct current (HVdc) circuit breakers based on power electronic technology usually require a large number of insulated-gate bipolar transistors (IGBTs) to achieve ...

Here's a look at the top five plays from the first half of the Week 7 NFC East Showdown between the Dallas Cowboys and Washington Commanders. 5. Brandon Aubrey breaks another record with 61-yard field ...

TOPEKA — Underneath the stands of the Stormont Vail Events Center is a long, dark hallway. Robbie Nichols walked down the corridor after the team’s scrimmage two weeks ago. He unlocked his office and ...

HONG KONG, Oct 13 (Reuters Breakingviews) - The truce between the United States and China always looked too good to last. What's surprising is how quickly it has fallen apart. The world's two largest ...