GB 50054-2011 第6.3.4条
| **** | The operating current of the residual current protective device shall ensure no nuisance tripping under normal leakage current (e.g., the line-to-ground leakage current of hotel guest room circuits generally does not exceed 5 mA), and it shall be capable of breaking the prospective short-circuit current. For the main incoming line or floor distribution boards, time-delay RCDs (e.g., 0.1 s~0.5 s) may be selected to achieve selective coordination with downstream RCDs. |