雷雨時に$50,000 VFDが故障した理由:エンジニアのためのサージ保護デバイス選定6ステップガイド
The Monday Morning Catastrophe It’s 6:47 AM on Monday, and your phone is already ringing. The plant manager’s voice is tight with panic: “The main production line is down. The VFD is completely fried—circuit boards are black, and there’s a burnt smell throughout the electrical room.” You rush to the site. Weekend thunderstorms rolled through, and a nearby lightning strike sent a massive surge through the facility’s power system. As you stare at the charred remains of a $52,000 variable frequency drive, you notice something that makes your stomach drop: there’s a surge protector installed right there in the panel—a $300 device that was supposed to prevent exactly this disaster. […]
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