electromagnetic interference (EMI)
電磁干擾 (EMI)
Copper is the most reliable metal in EMI shielding because it is highly effective in attenuating magnetic and electrical waves.
銅是 EMI 屏蔽中最可靠的金屬,因為它在衰減磁波和電波方面非常有效。
Lightning is known to emit significant electromagnetic energy in the radio-frequency range from below 1 Hz to near 300 MHz, with a peak in the frequency spectrum near 5 to 10 kHz for lightning at distances beyond 50 km or so.
眾所周知,閃電會在低於 1 Hz 到接近 300 MHz 的射頻範圍內發射大量電磁能量,對於距離超過 50 km 左右的閃電,其頻譜峰值在 5 到 10 kHz 附近。
所以為了避免變電箱或電子設備遭閃電能量擊毀
是不是應該利用金屬的屏蔽效應
在變電箱或電子設備上方
裝一個香菇狀
或傘狀
的金屬製品