TN-S系統的最大特徵是N線與PE線在系統中性點分開後，不能再有任何電氣連接，這一條件一旦破壞，TN-S系統便不再成立。

TN-S系統的特點

1.電氣設備金屬外殼接零保護時，接在專用的保護線PE上，安全可靠。

2.工作零線只用作單相照明負載迴路。

3.專用保護線PE不許斷線，也不許進入漏電開關。

4.幹線上使用漏電保護器，所以TN-S系統供電幹線上也可以安裝漏電保護器。

5.TN-S方式供電系統安全可靠，適用於工業與民用建築等低壓供電系統。

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TN-S system features

1. When the metal casing of the electrical equipment is connected to zero protection, it is connected to the special protection wire PE, which is safe and reliable.

2. The working zero line is only used as a single-phase lighting load circuit.

3. The special protection line PE is not allowed to be disconnected, nor is it allowed to enter the leakage switch.

4. The leakage protector is used on the main line, so the leakage protector can also be installed on the TN-S system power supply main line.

5. The TN-S mode power supply system is safe and reliable, and is suitable for low-voltage power supply systems such as industrial and civil buildings.

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