BN MLS 21 PTSC 813004_rev02

MAHARAJA LELA SOUTH PROJECT

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Doc. No: BN-MLS-21-PTSC-813004 Document Title: Specification Instrument Earthing Principles

Revision: 01 Received Date/ Status: 03 Jun 2014/ Code 2

Item Page Reference Comment Description Comment Reply Close Out(Y/N)

1. 9 of 14 Appendix 1 FBE: Are the Digital cable individual pair screened? [c] individual pair screened cable is used for digital input signals.

Response By: Tran Thanh Thuong Discipline: INS Date: 06 May 2014

DOC STATUS CODE a. Incorporated as is b. Incorporated with minor modification c. Not incorporated For status b and c, ENGINEER shall justify the reasons of the modification or of the rejection and provide the associated benefits and/or impacts.

COMPANY Document Number: BN-MLS-21-PTSC-813004

SPECIFICATION INSTRUMENT EARTHING PRINCIPLES

Revision: 02 Class : 1

Date: 21/Jul/2014 Status: AFC Document Type: SPE

System / Subsystem: N/A

Discipline: INS

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This document is the property of TOTAL E&P Borneo B.V. It must not be stored, reproduced or disclosed to others without written authorisation from the Company.

REVISION RECORD SHEET

No. Rev. No. Content of revision Date of Revision

1 00 Issued For Review 01/Apr/2014 2 01 Issued For Acceptance 26/May/2014 3 02 Accepted For Construction 21/Jul/2014






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TABLE OF CONTENT

1 PURPOSE ............................................................................................................................. 4 2 FIELD OF APPLICATION ..................................................................................................... 4 3 REFERENCE DOCUMENT ................................................................................................... 4

3.1 Project Specifications ............................................................................................. 4 3.2 COMPANY General Specifications (January 2011 Edition) ................................. 4

4 DEFINITIONS AND ABBREVIATIONS ................................................................................. 4 4.1 Definitions ................................................................................................................ 4 4.2 Abbreviations .......................................................................................................... 5

5 RESPONSIBILITIES .............................................................................................................. 5 6 PROJECT DESCRIPTION .................................................................................................... 5 7 EARTHING SYSTEMS .......................................................................................................... 6

7.1 Equipotential Protective Earth Bonding System (PE) .......................................... 6 7.2 Instrument Protective Earth System (IPE) ............................................................ 6

7.2.1 General ................................................................................................................. 6

7.2.2 Field Instruments .................................................................................................. 6

7.2.3 Junction Boxes ...................................................................................................... 6

7.2.4 System Cabinet, Marshalling Cabinet and Local Control Cabinet ........................ 6

7.2.5 Cable Trays / Ladders ........................................................................................... 7

7.3 Instrument Earth System (IE) ................................................................................. 7 7.4 Intrinsically Safe Earth System (ISE) ..................................................................... 7

8 TESTING OF EARTHING SYSTEM ...................................................................................... 7 APPENDIX 1 TYPICAL DIGITAL JUNCTION BOX EARTHING PRINCIPLES ........................... 9 APPENDIX 2 TYPICAL ANALOGUE JUNCTION BOX EARTHING PRINCIPLES ..................... 10 APPENDIX 3 MARSHALLING CABINETS EARTHING PRINCIPLES ........................................ 11 APPENDIX 4 OFFSHORE OVERALL EARTHING PRINCIPLES ................................................ 12 APPENDIX 5 INSTRUMENT LOOPS EARTHING PRINCIPLES ................................................. 13






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1 PURPOSE This specification describes the earthing principles for field instrumentation, control and safety systems applicable for Maharaja Lela South Project.

All earthing connections shall be carried out by CONTRACTOR.

For the earthing principle of Telecom system, refer to MLJ3 Platform Telecommunication Earthing Principle, ref. [4]. For the earthing principle of Electrical system, refer to Specification Design of Earthing, Bonding and Lightning Protection Systems, ref. [2].

2 FIELD OF APPLICATION This specification shall be applied to all documents issued by INSTRUMENT ENGINEER for MLJ3 platform throughout the engineering phase and during the warranty period.

3 REFERENCE DOCUMENT 3.1 Project Specifications [1] BN-MLS-21-PTSC-301001 MLJ3 Platform Process Design Basis [2] BN-MLS-21-PTSC-703001 MLJ3 Platform Specification Design of Earthing, Bonding and

Lightning Protection Systems [3] BN-MLS-21-PTSC-813001 MLJ3 Platform Specification Instrumentation Design And

Installation [4] BN-MLS-21-PTSC-823002 MLJ3 Platform Telecommunication Earthing Principle Specification

3.2 COMPANY General Specifications (January 2011 Edition) GS EP ELE 031 Design of Earthing and Bonding Systems GS EP ELE 051 Design and Installation of Lightning Protection GS EP INS 101 Instrumentation engineering, procurement and construction general

requirements GS EP INS 107 Design and Installation of Instrumentation Links GS EP INS 134 Design and supply of a distributed control system

4 DEFINITIONS AND ABBREVIATIONS 4.1 Definitions

Definition Description

COMPANY TOTAL E&P BORNEO B.V.

CONTRACTOR PTSC Mechanical and Construction Co., Ltd (PTSC M&C)

SERVICE Provision of Detailed Engineering Design and Procurement Support Services for MLJ-3 Wellhead Platform

SUB-CONTRACTOR Technip Vietnam Co., Ltd (TPVN)

VENDOR The company who will supply materials, equipment and service to COMPANY and/or CONTRACTOR as detailed in the relevant data sheets and specifications.






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Definition Description

SUB-VENDOR The company selected by VENDOR for services, materials, or equipment.

shall Refers to mandatory requirement.

should Refers to a recommendation.

4.2 Abbreviations Abbreviations Description IE Instrument Earth IPE Instrument Protective Earth IS Intrinsically Safe ISE Intrinsically Safe Earth PE Equipotential protective Earth bonding system PVC Poly Vinyl Chloride

5 RESPONSIBILITIES The CONTRACTOR shall assume final responsibility for the earthing connection of all the field instrumentation and Control and Safety systems to meet the requirement as per this specification.

6 PROJECT DESCRIPTION TOTAL E&P Borneo B.V currently produces gas and hydrocarbon liquids from their Maharaja Lela Jamalulalam (MLJ) field offshore Brunei via two offshore platforms (MLJ1 and MLJ2 respectively). Produced effluent is transported by an 18 multiphase subsea pipeline to the Onshore Processing Plant (OPP). The Maharaja Lela South development (MLS) will be based on production from high-pressure high-temperature wells at a new 12-slot wellhead platform with minimum process facilities, MLJ3 to supplement the production from the existing platforms MLJ1 and MLJ2. Well fluids will be routed to the onshore gas treatment plant, OPP, via a subsea tie-in at the existing MLJ1-OPP Pipeline.

Figure 6-1 Maharaja Lela South Development






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7 EARTHING SYSTEMS To ensure adequate protection to both personnel and equipment up to four (4) earthing systems shall be used (refer to GS-EP-ELE-031)

PE : Equipotential protective earth bonding system IPE : Instrument protective earth system IE : Instrument earth system ISE : Intrinsically safe earth system

7.1 Equipotential Protective Earth Bonding System (PE) Refer to the electrical Project specification Specification Design of Earthing, Bonding and Lightning Protection Systems, ref. [2].

The equipotential protective earth bonding system (PE) shall comprise the platform metallic / steel structures. The earthing system protects electrical equipment, cable and personnel from electric shocks.

At instrument equipment level, PE connection is established by bonding instrument metallic enclosures by mean of the external earthing lug/ screw on the instrument enclosures to adjacent metallic structure. This bonding shall be performed using PVC insulated stranded copper conductors, green and yellow coloured with a minimum of 6mm cross-section.

7.2 Instrument Protective Earth System (IPE) 7.2.1 General The IPE is a protective earth used only for instrumentation equipment and control and safety system equipment. All instrument metallic enclosures and cable armour shall be connected to the IPE. This IPE connection shall be made through the cable armour connected to IPE bar located in the junction box. The IPE continuity from junction box to marshalling cabinet is ensured by the armour of multi pair cable. The IPE bar in marshalling cabinet is then connected to the platform PE by mean of 35mm2 cross section green-yellow PCV insulated stranded copper conductors.

7.2.2 Field Instruments For typical field instruments, earthing continuity between braided armour and instrument casing shall be achieved by a metallic cable gland with stowing facility (Refer to MLJ3 Platform Specification Instrumentation Design And Installation, ref. [3], for cable gland definition). The field instrument casing bonding to the metallic structures shall be done through the earth lug. For field instruments with non-metallic enclosures, an earth tag shall be fitted to the cable gland to ensure a proper bonding to the platform metallic structure.

7.2.3 Junction Boxes For typical junction boxes, braided armours are connected to a copper gland plate via the cable glands. This copper gland plate, bored and threaded for each gland is connected to an extension earth stud, which shall be bonded to the platform steel structure using an earthing cable of a minimum 16mm cross section. A lock nut shall be provided with each cable gland in order to ensure the good electrical contact with the copper gland plate.

If the junction box is metallic, no earthing plate is required and the cable armour shall be earthed through the cable gland to the junction box wall, which shall be bonded to the steel structures.

7.2.4 System Cabinet, Marshalling Cabinet and Local Control Cabinet System Cabinet, Marshalling Cabinet and Local Control Cabinet shall be fitted with an IPE bar. The instrument cable armour of incoming and outgoing cables, together with the cabinet steel frame, shall be connected to this IPE bar. The cabinet IPE bar shall be connected to the equipotential protective earth bonding network through PVC insulated, copper conductors, green/yellow stripped cables of 35mm






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minimum cross-section.

The control desks (if any) shall be connected to the internal PE loop in the same way as the system cabinets.

Where cabinets or enclosures have hinged doors, the doors shall be bonded to the main steel frame with flexible nickel plated cooper earth straps of minimum 10mm cross section.

7.2.5 Cable Trays / Ladders In process area, cable trays / ladders shall be bonded together with earthing cable of 35 mm2 minimum cross section, refer to section 5.2 of COMPANY General Specification no GS-EP-INS-107. They shall be consistently connected up to the equipotential protective earth bonding network at both ends of the main routes.

7.3 Instrument Earth System (IE) The IE network is the earth reference for all instrument signals except when floating power supply is applied.

All instruments cables individual screens and overall screens shall be connected to the Instrument Earth System. This excludes the external braid of the Digital Communication Network cable, which shall be installed as specified by the systems VENDORS in order to eliminate excess noise

For junction box dedicated to digital signals, individual screen wires shall be connected to an IE bar in each junction box.

For junction box dedicated to analogue signals, individual screen wires shall be connected to dedicated screen terminals, including the individual screen of each pair in the multi-pair cables..

The overall screen of the multi-pair cables shall be connected to the IE bar at the marshalling cabinet. Instrument system / marshalling cabinet shall be fitted with one IE bar. All non-IS multi-pair cable

individual screens and overall screens shall be connected to this IE bar. The IE bus bar shall be connected to the cabinet IPE bar and to the PE network by a cable of 35 mm2 minimum.

7.4 Intrinsically Safe Earth System (ISE) The ISE network is the earth reference for all IS signals and galvanic IS barriers. The ISE and IE earth bars shall be isolated from the chassis and shall be mounted together as close as possible

Intrinsically safe cable shields and screens shall be connected to the ISE bar. The galvanic IS barriers shall be mounted in accordance with the terms of their IS certificate.

For IS junction boxes dedicated to IS measurement signals, screen wires shall be connected to dedicated screen terminals. All the screen terminals shall then be connected to the ISE bar in each junction box.

The overall screen of the multi-pair IS cables shall also be connected to the ISE bar. The galvanic IS barriers installed inside the system cabinets shall be directly mounted onto the galvanic

isolated barrier bus bars. All individual IS multi-pair cable screens shall be connected to these galvanic isolated barrier bus bars,

which in turn are connected to the ISE bar in the cabinet. System cabinets for the Instrument System / marshalling cabinet shall be fitted with one ISE bus bar. All

multi-pair cable individual screens and overall screen of ISE signals shall be connected to this ISE bar. The ISE bus bar shall be connected to the IE bus bar in the same cabinet by a 35 mm2 cable.

8 TESTING OF EARTHING SYSTEM The earthing layout shall be checked to verify if it has been carried out as per the specification. All earth resistances shall be measured and if necessary additional earth connections maybe added to achieve the resistance limits. Earthing arrangement shall comply with the COMPANY General Specification no.GS-EP-ELE-051.






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In addition, earthing tests shall be performed on all control panels, cabinets and preassembled unit junction boxes and local panels at the VENDOR premises.

These tests shall, as a minimum, include:

Measurement of earthing resistances, Checking of earthing segregation, Checking of floating power supply.

Cable sections given in this specification are typical only. It is the CONTRACTOR responsibility to ensure the maximum bonding resistance values (e.g. between IE bar to IE loop) are less than 0.5 Ohm.

CONTRACTOR shall test during the construction and pre-commissioning phases each bonding and shall report, in written, the current measured value within relevant report.






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APPENDIX 1 TYPICAL DIGITAL JUNCTION BOX EARTHING PRINCIPLES






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APPENDIX 2 TYPICAL ANALOGUE JUNCTION BOX EARTHING PRINCIPLES






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APPENDIX 3 MARSHALLING CABINETS EARTHING PRINCIPLES






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APPENDIX 4 OFFSHORE OVERALL EARTHING PRINCIPLES






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APPENDIX 5 INSTRUMENT LOOPS EARTHING PRINCIPLES






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Note: 1. ISE and IE earth bars shall be mounted on insulated spacer.

2. All earth bars shall be mounted together as close as possible in the cabinet.

3. All earth cables to main earth bars have to be approximately of equal lengths. Each cabinet shall be earthed by 35 mm2 PVC insulated cable.

4. For details of the earthing of the control and safety system coaxial cables follow VENDOR drawings.

BN MLS 21 PTSC 813004_rev02

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