Discussion
The rupturing capacity of an HRC fuse is ______.
Answer: D
An HRC fuse, a high rupturing capacity fuse, is built to break fault currents of very high value without damage to its surroundings, and its rupturing capacity is given as above 80 kA. It has a ceramic body filled with a quartz sand filler, which quenches the arc. The values above 10 kA, 20 kA and 40 kA are the capacities of ordinary fuses and do not describe a high rupturing capacity fuse. The answer is above 80 kA, option (D).
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