Fuse Switch Disconnector applications in Metropolitan Electricity Authority low-voltage system

Improving the Metropolitan Electricity Authority (MEA)'s low-voltage system to prepare for the increasing amount of solar photovoltaic (PV) systems, MEA has a new low-voltage protection system design concept by changing a traditional fuse (not able to turn on-off the circuit) to Fuse Switch Disconnector (FSD) according to IEC 60947-3 works with low-voltage fuse according to IEC 60269-1. Selecting low-voltage fuse size will consider coordination with MEA’s low-voltage cables. As a safety benefit, the Lineman working on the high-voltage distribution transformers will open the circuit with FSD to prevent electricity from entering the MEA's grid from the PV system.