TT系統適合哪些場合

详情描述：

TT系統由於接地裝置就在設備附近，因此PE線斷線的幾率小，且容易被發現。
TT系統設備在正常運行時外殼不帶電，故障時外殼高電位不會沿PE線傳遞至全系統。因此，TT系統適用於對電壓敏感的數據處理設備及精密電子設備進行供電，在存在爆炸與火災隱患等危險性場所應用有優勢。
TT系統能大幅降低漏電設備上的故障電壓，但一般不能降低到安全範圍內。因此，採用TT系統必須裝設漏電保護裝置或過電流保護裝置，並優先採用前者。
TT系統主要用於低壓用戶，即用於未裝備配電變壓器，從外面引進低壓電源的小型用戶。
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Which occasions is suitable for the TT system?
Since the grounding device is in the vicinity of the device in the TT system, 
the probability of disconnection of the PE wire is small and easy to be 
found.
When the TT system equipment is in normal operation, the outer casing is not 
charged. When the fault occurs, the high potential of the outer casing will not 
be transmitted to the whole system along the PE line. Therefore, the TT system 
is suitable for power supply of voltage-sensitive data processing equipment and 
precision electronic equipment, and has advantages in applications such as 
explosion and fire hazards.
The TT system can significantly reduce the fault voltage on the leakage 
equipment, but generally cannot be reduced to a safe range. Therefore, the TT 
system must be equipped with a leakage protection device or an overcurrent 
protection device, and the former is preferred.
The TT system is mainly used for low-voltage users, that is, for small users 
who are not equipped with distribution transformers and that introduce 
low-voltage power from the outside.
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system?'，please visit : http://livservices.com.hk
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