Earlier this year, Newton-Evans received 38 responses to a four page survey on the topic of power fuses, current limiting fuses and fuse links. Topics on the survey included number of power fuses, current limiting fuses and fuse links purchase annually; what brands are used; which current levels, voltage levels and speed ratings (K, E and DR) are used the most; what % of fuses are re-fillable vs. one-time use; and what % are used for indoor vs. outdoor applications.
What percent of power fuses being purchased are re-fillable power fuses (i.e. SM4, SM5) versus one time use (replaceable) power fuses (i.e. SMD20/SMU20, SMD40/SMU40)?
Newton-Evans Research found that most utilities either buy nearly all re-fillable power fuses or nearly all one time use power fuses. Among the sample, an average of 40% of power fuses are re-fillable, and an average of 60% are for one-time use. A frequency distribution of individual responses shows that the 2 largest portions are either 0% or 90-100% for either type.
What % of Power Fuses Are Refillable Vs. One-time Use?
What percent of power fuses are used for indoor applications (i.e. SM4Z, SM20) versus outdoor applications (i.e. SMD20, SMD40)
Overall findings from the surveyed utilities indicated that about 86% of power fuses are purchased for outdoor applications, and the remaining 14% for indoor applications. However, note that five survey respondents indicated that 70% or more of their power fuses were in fact for indoor applications.
What % of Power Fuses Are For Indoor Use Vs. Outdoor Use?
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