3. Protection against excess power is to be provided, either as an integral part of the equipment or as a part of the ships system. It is to be ensured that the fuel cell can be disconnected from the electrical load at any load condition.

4. The inverter is to be so designed that reverse power, such as breaking power, cannot pass into the fuel cell.

5. The outgoing circuits on a fuel cell arrangement is to be provided with a switch disconnector for isolating purposes so that isolating for maintenance is possible. Contactors are not accepted as isolating devices. For definition of “"switch disconnector”" refer to IEC60947-3.

302. Hazardous area classification