T&D

Circuit Breaker Handles Operating Currents up to 6300 A

Siemens Power Transmission and Distribution has expanded its range of products with the new high-current and generator circuit breaker 3AH37 Siemens Power Transmission and Distribution has introduced ...
EDN

Series of circuit breakers handles apps of 5 to 40 A

Harrisburg, Pa. – A series of low-cost circuit breakers for 5- to 40-amp applications is now available from Tyco Electronics. The P&B W54 thermal circuit breakers can be used in a variety of ...
Electronic Design

Components: Lightweight Circuit Breaker Handles 1 To 50 A In A Small Package

Don't let the light 60-g weight of the 4140 aerospace circuit breaker, which includes optional auxiliary contacts, fool you. It can handle 1 to 50 A in a package that's smaller than Mil-Spec MS 24571 ...
Electronic Design

Mini Circuit Breakers Handle From 0.5 To 25 Amps

A new DIN rail mount miniature circuit breaker has been designed with current ratings from 0.5A to 25A in 0.5A increments. The device, called the Model QL, is a hydraulic magnetic circuit breaker and ...
Electrical Construction & Maintenance

NEC Rules on Overcurrent Protection for Equipment and Conductors

Note: This article is based on the 2011 NEC. Overcurrent exists when current exceeds the rating of equipment or the ampacity of a conductor. This can be due to an overload, short circuit, or ground ...