SHORE SUPPLY IS USED MAINLY DURING DRYDOCK WHEN GENERATORS HAVE TO BE STOPPED FOR OVERHAULING. NOWADAYS MANY PORTS ARE SUPPLING SHORE CONNECTION SO THAT EMISSION CAN BE CONTROLLED IN PORTS.
HENCE A SHORE CONNECTION BOX MUST BE PROVIDED TO CONNECT THE SHORE SUPPLY TO THE SHIP. SHORE CONNECTION BOX IS MAINLY FOUND IN EMERGENCY GENERATOR ROOM.
SHORE CONNECTION BOX CONTAINS FOLLOWING COMPONENTS :-
- DATA PLATE TO SHOW VOLTAGE AND FREQUENCY OF SHIPS ELECTRICAL SYSTEM INCLUDING METHOD TO CONNECT THE CABLE.
- CIRCUIT BREAKER AND FUSE
- PHASE SEQUENCE INDICATOR
- INDICATOR LAMP
SHORE SUPPLY WHEN CONNECTED TO THE SHORE SUPPLY BUS BAR, ITS PHASE SEQUENCE IS CHECKED BY THE HELP OF PHASE SEQUENCE INDICATOR. PHASE SEQUENCE INDICATOR IF SHOWS CLOCKWISE ROTATION THEN ITS OK, AND IF ANTI CLOCKWISE ROTATION THEN SHORE SUPPLY TO BE STOPPED AND DISCONNECTED AND ANY TWO PHASES ARE INTERCHANGED. THEN AGAIN ONCE MORE THE PHASE INDICATOR IS CHECKED.
BEFORE STARTING THE SHORE SUPPLY, EMERGENCY GENERATOR SHOULD BE PUT IN MANUAL AND THEN THE GENERATORS SHOULD BE STOPPED. ONCE BLACK OUT HAPPENS. THEN ONLY THE SHORE SUPPLY SHOULD BE MADE ON. AN INTERLOCK IS PROVIDED WHICH DONOT LET THE SHORE SUPPLY TO COME ON LOAD BEFORE MAIN POWER IS OFF.