Distribution transformers must adhere to NEC and NFPA 70 standards, with specific requirements for overcurrent protection, ...

Overcurrent relays with inverse definite minimum time (IDMT) characteristics are widely used in power systems to protect ...

All questions and answers are based on the 2017 NEC. Q. Per the NEC, overcurrent protection devices must be placed at what location in branch-circuit or feeder conductors? A. Except as permitted by ...

One of the most common reasons to measure current in today’s automotive systems is to detect fault conditions and respond to them quickly. I touched on this topic previously in Signal Chain Basics ...

This circuit provides latching and high-speed overcurrent protection for power-factor corrected (PFC) boost converters operating at dc voltages to 380 V. Overcurrent damage of PFC front-end boost ...

The more functionality that a system has to present to the user, the more complex and power-hungry it tends to be. Power architects are under tremendous pressure to expand the boundaries of power ...

Requiring only a handful of inexpensive components, the circuit breaker in Figure 1 responds to both overcurrent- and overvoltage-fault conditions. At the heart of the circuit, D 2, an adjustable, ...

The usual way of preventing a small motor from drawing too much current is to install overcurrent protection in the form of a circuit breaker or some other kind of limiter. But installations that ...

A transformer protection relay does not replace upstream devices. It defines responsibility. By clearly assigning fault detection to the transformer zone, it allows feeders, breakers, and system ...

As the electric distribution system transforms into a smarter network, Commonwealth Edison Co.’s distribution automation team has embarked on a step-change journey that will transform distribution ...

S&C has upgraded Coordinaide — The S&C Protection and Coordination Assistant. It’s available now on the S&C website. The IntelliRupter PulseCloser application has been expanded to include a sensitive ...