Overload or Short Circuit Protection? How to Protect Your Design Against Both Dangers
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Circuit breakers are used in a variety of ways. They are mounted in panelboards to protect branch circuit wiring, and they are built into equipment to protect it. With this range of applications, it's not surprising that a circuit breaker must provide both short circuits and overload protection. This white paper will give pointers on how to determine the main job a breaker must do and how to make an appropriate selection...
Dirty Dozen: 12 Most Common Mistakes When Specifying Circuit Protection for Equipment
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It's only a circuit breaker. Yet there is enough complexity and confusion when it comes to specifying circuit protection that many engineers are designing equipment with too little or too much protection. Under protected circuits leave equipment vulnerable to damaging electrical surges. Over protected circuits add cost and can lead to nuisance tripping. Like Goldilocks and the three bears, the goal is to specify circuit protection that is just right'...
Clearing up the Confusion: Specifications and Standards
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Electrical engineers do not want to see designs go up in smoke. Naturally, engineers protect their equipment with what they believe to be appropriate circuit protection. However, there is widespread misunderstanding of industry standards for circuit protection and the meaning of terms such as "circuit breakers," "supplementary protectors," "circuit breakers for equipment" and "branch circuit protection." In some cases, this confusion results in the specification of the wrong type of circuit protection and increases the risk of overheating, premature failure and catastrophic faults...