The circuit in Figure 1 provides a low-cost, isolated ac-line monitor that measures ac-line-voltage level and has some other unique capabilities. The analysis of the circuit is straightforward: When ...

This circuit is a very simple voltage monitoring device for +5V VCC supply lines. It can be used to monitor the power supply of a microcontroller (uC) by indicating when the supply level raises above ...

Promising to simplify high-side current sensing in a wide range of high-voltage circuit protection applications, the ZXCT1080 current monitor provides an extended, common-mode-sensing voltage range ...

ABB introduced a new remote monitoring solution for any OEM circuit breakers filled with sulfur hexafluoride (SF6) gases, at its booth at the IEEE PES T&D Expo. The Circuit Breaker Sentinel, or CBS-F6 ...

Electronic systems are often subject to the power limitations imposed by their power supplies and batteries, and the maximum power available from those Jeffrey S. Mueller, Ph.D., Maxim Integrated ...

With Assetguard MVC, Siemens has developed a new monitoring system for circuit-breakers in medium-voltage switchgear. The system monitors, in particular, the operability of the circuit-breaker drive, ...

If you've ever wondered how electronic devices manage to control circuits with precision and safety, you're thinking about the magic of relays. Relays act as the unsung heroes in many of our devices, ...

Lurking in the shadows of even the most unsuspecting operations — from corporate to commercial to industrial facilities — is a condition known as poor voltage quality, a hidden expense that typically ...

A VFD reports a low-volts fault when the drive's dc link voltage drops below 62% of the nominal level for the high setting (480 Vac) and 50% of nominal for the low setting (400 Vac). The +10% and -15% ...