Grid switches use silver alloys to survive lightning-hot sparks
When a power grid fault occurs, circuit breakers must extinguish a plasma arc twice as hot as the sun's surface in less time than a single heartbeat.
Every time you flip a heavy-duty power switch, a miniature lightning bolt tries to bridge the gap. In the split second before the contacts separate, the air ionizes into a plasma arc that reaches 20,000 degrees Celsius—hot enough to vaporize steel instantly. To survive this, engineers use specialized silver-tungsten alloys. While the silver provides excellent conductivity, the tungsten acts as a heat-resistant skeleton that prevents the metal from melting and welding shut under the intense heat.
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