GB 50054-2011 第6.1.2条
| **** | Distribution circuits shall be provided with short-circuit protective devices capable of breaking the prospective short-circuit current at their point of installation. For terminal circuits such as hotel guest rooms and corridors, the rated short-circuit breaking capacity of the short-circuit protective device (e.g., circuit breaker) shall not be less than the prospective short-circuit current at that point (typically calculated based on transformer capacity and circuit impedance, and generally not less than 10 kA). |