6.3 故障原因 Fault causes
系统故障一般有以下几个原因:
System fault causes are listed as follows:
⚫
外电网连接故障(如:交流线没有连接好) ;
⚫
Connection fault of external grid (such as poor connection of cable
A, B or C or incorrect phase sequence connection);
⚫
光伏阵列超出工作电压范围;
⚫
PV array exceeds the working voltage range;
⚫
电网欠压(U
⚫
Grid undervoltage(U
⚫
电网过压 (U
⚫
Grid overvoltage (U
⚫
电网频率过低 (f
图 6-1 风扇更换步骤
Figure 6-1 Fan replacement steps
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