Against All Oddities: A Century in 3 Months

Regular readers may remember that I pulled a Toyota Century out of a kudzu patch in Durham, back in June. Thomas, first mate ...
EDN

Crowbar circuits: Revisiting the classic protector

Crowbar circuits have long been the go-to safeguard against overvoltage conditions, prized for their simplicity and ...
IEEE

Tracking Control of Vacuum Circuit Breaker Based on a Control Law with Nonlinear Correction Function

Abstract: For phase-controlled vacuum breakers, the acting time of Permanent Magnetic Actuator (PMA) should be precise. Variation of capacitor voltage, jamming, temperature, etc. (called disturbance ...
EDN

Enabling a variable output regulator to produce 0 volts? Caveat, designer!

Testing a regulator all the way down to zero volts to see how it behaves and finding an output level, below which bad things ...
IEEE

SiC MOSFET Solid-State Circuit Breaker-Based Motor Control Center: Design Analysis, Novel Soft Start, and Soft Turn-Off Strategies

Abstract: Solid-state circuit breaker (SSCB) has been identified as a potential game-changing technology for dc distribution systems. However, fewer SSCB research and applications have been reported ...
Electrical Construction & Maintenance

NEC Article 501: Class I Hazardous Locations

Article 501 provides the requirements for Class I locations, such as the refinery shown in Photo 1. In the May issue, we described the Division system outlined in the NEC, which further breaks down ...