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Arcing Horns

Standard arcing horns are designed to prevent arcing at the main switch contacts. Although they are given no interrupting rating, it is common practice to use these devices to interrupt small values of current such as the charging current of a short length of line or transformer magnetizing current. It should be recognized that the confined electric arc at the switch contacts could cause damage to the switch, and involve adjacent phases, or supporting structure, in the initiation of a major fault.
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