Electrical Engineering · Switchgear and Protection
In a High Rupturing Capacity (HRC) fuse, the space surrounding the fuse element is filled with a powder such as silica sand. What is the primary role of this filling material during the interruption of a fault current?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1To increase the current carrying capacity of the fuse element.
- 2To act as a lubricant for the mechanical parts of the fuse.
- 3To chemically react with the metal vapor and create a high-resistance path to quench the arc.✓
- 4To maintain a constant temperature for the fuse element during normal load.
Correct answer
To chemically react with the metal vapor and create a high-resistance path to quench the arc.
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