弱電工程中IT系統有哪些特點
1.IT系統可以有中性線，但IEC(國際電工委員會)強烈建議不設置中性線，因為如果設置中性線，在IT系統中任何一點發生接地故障，該系統將不再是IT系統。
2.IT系統發生第一次接地故障時，接地故障電流僅為非故障相對地的電容電流，其值很小。
3.IT方式供電系統在供電距離不是很長時，供電的可靠性高、安全性好。
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Characteristics of IT systems in weak current engineering
1. The IT system can have a neutral line, but the IEC (International Electrotechnical Commission) strongly recommends not setting the neutral line, because if a neutral line is set and a ground fault occurs at any point in the IT system, the system will no longer be an IT system. .
2. When the first ground fault occurs in the IT system, the ground fault current is only the non-fault relative ground capacitance current, and its value is small.
3. IT power supply system When the power supply distance is not very long, the power supply has high reliability and good security.
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