  This paper uncovers potential negative impacts on the SAIFI reliability index
produced by the installation of Distributed Generation (DG) in distribution
networks when subjected to temporary faults. Detailed network modeling produces
accurate time-domain simulations which show how the negative effects on
reliability index occur. The problem is caused by fuse opening due to the wrong
location of the DG and unsuitable relay settings. A 4 kV urban distribution
system is chosen for the analysis. Over 50% of the possible locations where DG
can be installed in the network under study yield reduce reliability.
