as the S&P 500 slipped toward the threshold that would trigger an initial “circuit breaker.” The S&P 500 SPX was down 4.6% near 4,200 in recent trade, after hitting a session low at 5,115.27 ...

In a previous article, we overviewed the circuit breaker maintenance practices presently in application, including a listing of some of the important tests in use, with reference to the applicable ...

A circuit breaker is an important equipment to power electric networks. Its importance is due to the protection role it is playing. Hence, it is imperative to assure its proper operation. This is only ...