We revisit the loss reduction problem for network reconfiguration in power distribution systems in this paper. Besides the conventional line power loss (LPL), in our model, we introduce a new concept - the transient power loss (TPL), which is mainly induced by the communication asynchronization and response delay. TPL is often overlooked in previous works because it's hard to measure in the conventional power networks. However, we can tackle this challenge in smart grid especially with the help of smart meter. In this paper, we propose a new heuristic greedy algorithm to achieve the minimal LPL with bounded TPL and we assess its performance via simulation based on the IEEE-33 nodes system. © 2012 IEEE.