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| An electrician and an apprentice repair a circuit breaker from an industrial panel. |
Electrical Industry News The Ins and Outs of Circuit Breaker Maintenance
Circuit breakers can protect systems from overcurrents and short circuits when properly maintained. To properly use these devices, it's essential to understand how they work and how they are constructed. In this article, PEARL member Shermco Industries, Inc., describes the popular types of circuit breakers...Read more
Schneider Electric Announces Safety Notice for Masterpact Circuit Breaker
The Masterpact NW Circuit Breakers manufactured by Schneider Electric -- listed at 88 to 6300A and assembled in North America -- may have a nonconforming washer on primary terminal mounting screws. As a result, a low clamp force between the terminal and the breaker/cradle could result in overheating at the loose connection. Get your answers to frequently asked questions...Read more
How to Find the Short Circuit Duties for Medium-Voltage Circuit Breakers
and Fuses
Part 1 of a two-part article uses a simplified power system to find the short circuit current duties of circuit breakers and fuses. Because a short circuit fault can cause a high level of current to flow, the electrical equipment must be able to withstand the stresses of the current, and the interrupting devices must be able to interrupt it. Otherwise, it can lead to equipment failure, a threat to facility operations, or worker injury or death...Read more
ANSI Approves NEMA Standard on Switches
Preventive maintenance is key to the longevity and reliability of switches. To ensure that switches are properly maintained, the American National Standards Institute (ANSI) approved the National Electrical Manufacturers Association's standard for distribution equipment...Read more
Economic Slowdown Creates Surge in Demand for Reconditioned Equipment
