IEEE 80005-1-2019 pdf download

IEEE 80005-1-2019 pdf download.Uillity connections in port -Part 1: High voltage shore connection (HVSC) systems – General requirements.
4.6.4 Electrical equipment in areas where flammable gas or vapour and/or combustible dust can be present
HVSC equipment shall be located outside the hazardous areas of the ship and shore facilities under normal operating conditions, except where it is shown to be necessarily located in these areas for safety reasons.
HVSC equipment that may fall within one of the hazardous areas of the terminal under emergency conditions (inadvertent movement of ship from berth) shall be
a) certified in accordance with IEC 60079 (all parts) as suitable for the flammable gas or vapour and/or combustible dust encountered; or
b) automatically isolated and discharged before entering the potentially hazardous area.
Control equipment located within hazardous areas shall not present an ignition hazard.
4.7 Electrical requirements
The type and routine tests for all components of HVSC system shall be performed according to relevant standards.
To allow standardisation of the HV shore supply and link nominal voltage (66 kV AC or 11 kV AC) in different ports, any equipment requiring conversion to nominal voltage shall be installed onboard.
The prospective short-circuit contribution level from the HV shore distribution system shall be limited by the shore-side system to 16 kA RMS, unless otherwise specified in the ship-specific annexes.
The prospective short-circuit contribution level from the onboard running induction motors and the generators in operation shall be limited to a short-circuit current of 16 kA RMS, unless otherwise specified in the ship type’s specific annexes.
Electrical system/equipment, including short-circuit protective device rating, shall be suitable for the prospective maximum short-circuit fault current. Equipment shall be rated for minimum short-circuit withstand current of 16 kA RMS for 1 s, and 40 kA peak, unless otherwise specified in the ship specific annexes.
4.8 System study and calculations
The shore-connected electrical system shall be evaluated. The system study and calculations shall determine the following:
a) the electrical load during shore connection;
b) the short-circuit current calculations (see IEC 61363-1) shall be performed in order to take into account the prospective contribution of the shore supply and the ship’s installations. The following ratings shall be defined and used in these calculations:
1) for shore supply installations, a maximum and minimum prospective short-circuit current for visiting ships;
2) for ships, a maximum and minimum prospective short-circuit current for visited shore supply installations.
c) the calculations may take into account any arrangements that
1) prevent parallel connection of HV shore supplies with ship sources of electrical power, and/or
2) restrict the number of ship generators operating during parallel connection to transfer load, and
3) restrict load to be connected.
d) system-charging (capacitive) current for shore and ship; this system-charging current calculation shall consider the shore power system and the expected ship power system including the on-line generator(s);
e) shore power transformer neutral earthing resistor analysis, where neutral resistor is required by annexes (see 6.2.3);
f) transient overvoltage protection analysis (see 5.2);
g) fail-safe principle for cables/connectors operation (see 4.6.1).
These calculated values shall be used to select suitably rated shore connection equipment and to allow the selection and setting of protective devices so that successful discriminatory fault clearance is achieved for the largest on-board load while connected.
The system study shall be made available to all involved parties.
For ships with low voltage main distribution the connection between LV-side of the onboard transformer and main switchboard shall be evaluated, and overload protection shall be provided between the onboard transformer and the receiving switchboard.
Documented alternative proposals that take into account measures to limit the parallel connection to short times may be considered where permitted by the relevant authorities. Documentation shall be made available to relevant ship and shore personnel.
4.9 Emergency shutdown including emergency-stop facilities Emergency shutdown facilities shall be provided. When activated, they will instantaneously open shore connection circuit-breakers onshore and onboard ship.
Fail-safe, hard-wired circuits (safety circuits) shall be used for emergency shut-down. This does not preclude emergency shut-down activation commands from programmable electronic equipment, for example programmable protection relays.