BUS WAY 保護性接地和功能性接地

https://control.com/forums/threads/protective-earth-and-functional-earth.26806/

保護性接地和功能性接地

 保護地又稱臟地，用於保護人員和設備。

然而，功能性的地球是乾淨的地球。這也是數字和模擬信號的參考地。還需要減少信號的失真。

Protective earth and functional earth

protective earth or circuit protective earth is intended to protect the personals from electric shock during an earth fault in any appliances he/she is using. This earth conductor will have a connection from appliances metalic exposed part up to the main earth terminal in the supply intake room. The fault current will flow through this conductor to the eart mass which will in turn on the protective devices such as MCB or RCD to safely open the circuit within 0.4 seconds.

Functional earth is intended to reduce the radio frequency noise, computer filters to enhance the clarity of signals or other equipments which have always 10mA leakage current. Functional earthing must be separated from installation earthing except at the main earth terminal connection point.

保護性接地和功能性接地

保護接地或電路保護接地旨在保護人員在使用的任何設備發生接地故障時免受電擊。該接地導體將具有從電器金屬暴露部分到供電室中的主接地端子的連接。故障電流將通過該導體流至接地塊，接地塊將打開 MCB 或 RCD 等保護裝置，在 0.4 秒內安全斷開電路。

功能接地旨在減少射頻噪聲，計算機濾波器旨在增強信號清晰度或其他始終有 10mA 洩漏電流的設備。除主接地端子連接點外，功能接地必須與安裝接地分開。