Mersen’s Current-Limiting Fuses Improve Power Quality white paper discusses the advantages of using current-limiting fuse to protect against disruptive heating and electromagnetic effects and help improve the power quality of a power system.

Excerpt:

Voltage sags (sometimes called voltage dips) in power networks due to power system short- circuit faults can cause serious problems for computer systems, adjustable-speed drives, and other industrial and domestic systems [1,2]. The cost of downtime and incorrect operation of equipment is becoming increasingly important. A recent study showed that major industrial users in South Africa suffer annual losses of more than $200 million due to voltage sags [3].

The effect of a voltage sag is dependent upon its magnitude and duration. A curve published by the Information Technology Industry Council (ITIC, formerly known as CBEMA), is often used as a yardstick for the assessment of voltage sags. This curve, shown in Fig.1, defines overvoltage and undervoltage limits as a function of time. The region in between these two limits is a region of acceptable power quality. Although the…>>Read More