Functions on the Cargo Console for ESD/TPS 1) ‘ESD Block’ Input Blocking at Sea

Set the ‘ESD block’ switch on the Cargo Console. In this mode, all ESD inputs as defined in the C&E are blocked: i.e. no alarms and no actions due to ESD inputs will be set from the system. TPS 1 and TPS 2 functions will not be affected.

The extremely high level sensors in the cargo tank can be blocked from the independent cargo tank level system itself.

The very high level alarm in the cargo tank can be blocked from the IAS mimic display. These level alarms comes from the radar level system (CTS).

2) Loading and Unloading Mode

In ‘Loading’ mode, there is a time delay for shutdown of manifold valves. This time delay will protect the shore cargo equipment by giving the shore side time to shutdown before the flow of cargo from the ship shuts down. The length of the time delay is fixed during commissioning and can not be configured by the operator. Other outputs than manifold valves will have no time delay.

3) ESD Reset

Resets all outputs in the ESD/TPS provided inputs are back to normal and acknowledged.

4) ESD Test

Overrides all ESD/TPS outputs in order to facilitate system testing of inputs and logic.

4 - 91 Part 4 Cargo System

Illustration 4.12.5a Ship-Shore Link

CARGO CONTROL ROOM

SHIP SHORE LINK ENCLOSURE

CARGO CONTROL CONSOLE CCC6

CARGO CONTROL ROOM _ACCOMODATION SHIP SIDE PORT ON DECK

UPP DK

SHIP SIDE STBD ON DECK 220 VAC 1X2X1.0 PSU PSU MODEN MLM DESKTOP PC JB-INT HOT-LINE TELEPHONE GENERAL ALM PABX TELEPHONE ESDS (AMRI-SEIL)

ELECTRIC ESD SHIP SHORE/SHORE-SHIP FO ESD SHIP SHORE/SHORE-SHIP YOKOGAWA (DCS)

COMMON ABNORMAL ALARM

AC 220V MAIN NORMAL POWER 24V DC BACKUP SUPPLY, 8A MAX

GENERAL ALM 220 VAC UPS 1X2X1.0 SERIAL C/O SWITCH RJ11 RJ45

POWER SUPPLY MODULE FO & EL SYSTEM SELECTOR MODULE FO PORT STARBOARD SELECTOR MODULE FO CONTROL & ALARM MODULE

ELECTRIC SYSTEM CONFIGURATION MODULE B A D E C B A D E C B A D E C B A D E C SW 1 PYLE ITT CANNON MIYAKI SW 2 SW 3 SW 4 SW 5 ESD SYSTEM SELECT

HOTPHONE PRIVATELINE SW 7 TEL CH1 TEL CH2 TEL CH3

B A D E C SW 6 TEL CH4 NORMAL

TRIPS ACTIVE SHIP TO SHIP REVERSE CONNECTION AC MAINSSUPPLY ABNORMAL PRESS TO TEST INHIBIT RESET INHIBIT RESET LAMP TEST PORTSTBD HEALTHY PRESS TO TEST LAMP TEST PRESSTO TEST AUDIO ALARM PRESS TO TEST CIRCUIT TEST SYSTEM FAULT FO ESD MODULE SELECTED

FIBRE OPTICELECTRIC FIBRE OPTIC SYSTEM

SYSTEM SELECTOR NORMAL NORMAL SHIP -> SHORE SHORE -> SHIP ABNORMAL NORMAL ABNORMAL ESD CH 1CH 2CH 3CH 4 SIGNAL FAULT

ESD SYSTEM Telephone SYSTEM HEALTHY ESD HEALTHY LOADING ARM TRIP 1 HEALTHY LOADING ARM TRIP 2 HEALTHY SHORE RECEIVING HIGH LEVEL HEALTHY SELECTED ELECTRICAL SYSTEM TRIP INPUTS

9w D ITT CANNON ITT CANNON PORT STBD PUBLIC TELEPHONE GENERAL ALM TELEPHONE BOOTH RJ11 RJ11 RJ11

4 - 92 Part 4 Cargo System 4.12.5 Ship Shore Link

Maker: Seatechnik

Linked ship-shore emergency shutdown systems have been required by SIGGTO since the early days of LNG loading and discharge installations. They minimize the consequences of an accident or, if abnormal conditions arise, they allow the process to be shut down with minimum spillage of liquid. Thus consequent risk to jetty and ship’s structures and escape of flammable vapour is avoided.

Since both the ship and the shore exchange liquid and vapour, the shipside and shore-side Emergency Shutdown (ESD) must be linked.

This is to avoid:

y Excessive pressure on the loading arm connection causing

damage, should the upstream valve be closed first. y Overfilling ship or shore tanks.

y Risk of damage or spillage due to excessive movement of ship with respect to berth.

In addition to safety, the requirement for the ESD ship to shore link has been extended to handle communications by telephone.

The ship-shore links are implemented on the ship as follows: Electric Link

The Ship-Shore Link Control Panel, for Emergency Shut Down System (ESDS) & Communications, is supplied for complete compatibility with the Middle Eastern and Atlantic Basin import LNG Terminals. These systems are used in 30% of all LNG terminals as either a main system or as a back-up system. The system handles;

z 4 telephone channels

z Single ship-shore and Shore-ship ESD voltfree contact signals

The main Fibre Optic Ship Shore Link system (FO-SSL) is used in conjunction with this Electric ESD system (PNC).

The system relies on Pyle National Ex’d flameproof connectors for connection of the shore cable the ship shore interface and, once connected to the ship, at the shore receptacle at the shore cable reel. The system uses a 37 way Pyle National telecommunications and ESD digital and a 4∼20 mA ship analogue process signal. The 37 pin connector is fitted to the end of a cable reel on which the shore end is provided with a second connector provided by NFI. The telephones on the ship are connected to the shore and are not powered from shipboard supplies.

There is a 4 way earth connector fitted from ship-shore as used on some European terminals, but this contravenes current OCIMF and SIGGTO regulations and is not recommended unless insisted upon by the terminal.

A 50 m umbilical is fitted to enable ship-to shore linking. Ship supply is required by some terminals.