PPCoN Additional Technical Requirements
Electrical System
ADDITIONAL REQUIREMENTS
TO
NORSOK STANDARD
NORSOK Standard Cross Reference List
E-001, Electrical Systems, Rev. 3, Dec. 1997
Disclaimer:
"The Phillips Petroleum Company Norway specifications attached to this homepage are an unofficial and uncontrolled version and are set forth for information purposes only. Contractors who have contracts with Phillips Petroleum Company Norway are advised that they must comply with the binding, controlled version of the specifications set forth in their contracts with Phillips Petroleum Company Norway, and that they are responsible for ensuring proper compliance by their subcontractors with such controlled version of the specifications".
For information please contact the following:
O. J. Hana – Tlf.: (+47) 52 02 16 36
G. Gundersen – Tlf.: (+47) 52 02 14 55
CONTENT PAGE
1 INTRODUCTION 4
1.1 Purpose and Scope 4
1.2 Responsibility 4
1.3 Approval 4
1.4 Distribution/revision 4
1.5 Filing/retrieving 4
1.6 Registration 4
1.7 Handling of non-conformances 5
1.8 Abbreviations/definitions 5
1.8.1 Abbreviations 5
1.8.2 Definitions 5
1.9 Normative References 5
2 TECHNICAL REQUIREMENTS 6
2.1 General 6
2.1.1 Climatic conditions 6
2.1.2 Hazardous atmospheres 6
2.1.3 Responsibility of area classification 6
2.1.4 Interface and replacement of existing equipment and systems 6
2.1.5 Use of annexes 7
2.2 E-001 ELECTRICAL SYSTEMS 7
2.2.1 5.1 System voltages and frequency 7
2.2.2 6.3 Uninterruptible power supply (UPS) system 7
2.2.3 5.4 Earthing 7
2.2.4 5.5 Lighting system 8
2.2.5 5.5.2 Lighting equipment 8
2.2.6 7.1 High voltage switchboard 8
2.2.7 6.2 Low voltage switchboard 8
2.2.8 6.5 Motors 9
2.2.9 7 RELAYS AND PROTECTION 9
2.2.10 Other requirements 10
2.3 OTHER REQUIREMENTS 11
2.3.1 Junction boxes 11
2.3.2 Equipment to be taken permanently out of service 11
2.3.3 Preventive maintenace (PM) requirements 11
2.4 Cable transits, typical details 12
2.4.1 Typical welding instruction of Roxtec frames. 13
2.4.2 Flanged steel frames, insulation level A-0 14
2.4.3 Steel frames, insulation class A-0 15
2.4.4 Steel frames, insulation class A-60 deck 17
2.4.5 Steel frames, insulation class A-60 bulkhead 18
2.4.6 Steel frames, insulation class A-60 bulkhead 19
2.4.7 Steel frames, insulation class H-60 and H-120, bulkhead 20
2.4.8 Penetration for a single cable, insulation class A-0 – A-60, deck and bulkhead 21
ANNEXES:
Annex 5:2:2:A: Uninterruptible power supply system
Annex 5:2:9:A: Operating circuit for ESD system battery isolating breaker(s)
Annex 5:2:9:B: Power supply to ESD system - drilling and platform
Annex 5:3:1:A: Trace heating installation details
Annex 5:3:5:A: Glanding & earthing details
Annex 5:3:5:B: Earthing & bonding
1 INTRODUCTION
1.1 Purpose and Scope
These additional technical requirements are developed by Phillips Petroleum Company Norway E&P. These additional technical requirements cover requirements additional to the NORSOK Standards as listed under Normative References.
1.2 Responsibility
The Section Leader for Electrical & Automation systems is responsible for this document and for ensuring that it is updated or revoked when required by organizational or operational conditions.
1.3 Approval
The document shall be approved by the Director, Technical Support Department.
1.4 Distribution/revision
This document is distributed in accordance with the distribution list. Those persons specified on the distribution list are responsible for inserting revised pages when received and for removing obsolete. In addition they are responsible for informing Information Logistics, lost manuals, changes in address and for returning the manual when no longer required. This document is also available on NORSOK homepage: http://www.nts.no/norsok/implementation
1.5 Filing/retrieving
The record copy (RC) is filed be the Competence Area for Information Logistics.
1.6 Registration
This document as well as the directives are registered with an individual document number in the company's document administration system (FYI) which is managed by the Competence Area for Information Logistics.
1.7 Handling of non-conformances
Deviations shall be handled in accordance with guideline CP-217, "Reporting and Handling of Non-Conformance and Deviation Permit". All approved/rejected deviations shall be sent to the Technical Document Center for registering and filing.
1.8 Abbreviations/definitions
1.8.1 Abbreviations
CCR Central Control Room
ESD Emergency Shut Down
LER Local Equipment Room
UPS Uninterruptible Power Supply
YESD Yellow Emergency Shut Down (NAS 1)
NAS "Nødavstengning"
1.8.2 Definitions
1.9 Normative References
NORSOK Standards:
E-001 Electrical Systems
E-002 Adjustable Speed ac Motor Drives
H-001 Heating, Ventilation & Air Conditioning (HVAC)
Z-010 Installation of Electrical, Instrument & Telecommunication
Z-015 Temporary Equipment
PPCoN References:
CP 217 Guidelines for the Control of Non-Conformance
3826 Area Classification.
4672 Heating, Ventilation & Air-Conditioning (HVAC)
4676 Field Instrumentation
4675 Safety Shutdown Systems
2169 PPCoN Engineering Numbering System (PENS)
3599 “Arbeid på elektrisk utstyr”
3093 Notification of ESD Design & Modification (CP 501)
4584 Electrical, Instrumentation & Telecommunication Installation
4085 Pre-Commissioning, Commissioning and Handover Manual
4086 Mechanical Completion Manual
3801 Notification of Electrical Installation
Other References:
2 TECHNICAL REQUIREMENTS
2.1 General
2.1.1 Climatic conditions
The installation shall operate satisfactory under the following environmental conditions:
Maximum sea temperature: : + 18oC
Minimum sea temperature: : + 2oC
Maximum air temperature: : + 25oC
Minimum air temperature: : - 10oC
Maximum indoor temperature: : + 35oC
Maximum relative humidity : : 100% (condensing in field)
Minimum relative humidity : : 28%
Atmosphere: : Saltine and corrosive
Wind velocity: : 25m/sec gusting to 45m/sec
for more detail information see
Structural Design of Modules (currently
being prepared, contact discipline)
2.1.2 Hazardous atmospheres
All equipment to be in operation during situation of hazard and accident, except where located in CCR, LER, in emergency switch room, emergency generator room, battery charger and UPS room or living quarters, shall as a minimum be suitable for zone 1 area, gas group IIA, temperature class T3 hazardous atmosphere.
Note: Battery room installation shall be approved for gas group IIC.
2.1.3 Responsibility of area classification
When determining area classifications all proposals should be made to the E&P Safety Engineering Section before approval from electrical responsible person.
See Engineering Directives 3826 Area Classification.
2.1.4 Interface and replacement of existing equipment and systems
Interface to- or replacement of existing equipment and/or systems should comply with the philosophy used on the platform involved. Anyhow a case by case evaluation shall be done to evaluate use of NORSOK or old specifications. An evaluation shall be done in close co-operation with responsible discipline and shall be approved by responsible discipline.
Reference between drawings (existing platform drawings and new drawings) is mandatory. This is applicable for all drawings, also standard vendor package drawings. These requirements also apply between different types of drawings, ie. electrical, mechanical and instrument. If vendors standard drawings contain different symbols or signs than those used on PPCo facilities, a legend explaining symbols shall be used.
2.1.5 Use of annexes
The content of all annexes in this additional technical requirement are PPCoN interpretation of roles and regulations and shall as such be considered normative. The drawings in the annexes give more detailed information than NORSOK and include valuable installation and design information. Anyhow the layout of the drawings shall be considered as guidelines only.
2.2 E-001 ELECTRICAL SYSTEMS
The alpha/numeric headings in the following chapter reference the headings in NORSOK standard E-001.
2.2.1 5.1 System voltages and frequency
Distribution systems on existing platforms are not uniform. Differences are found in generated voltages and frequency, distribution voltages and system earthing. D.C. system voltages also vary from platform to platform. Reference shall be made to Company for details of the system in use on a particular platform.
All electrical equipment shall be specified at the rated voltage and frequency (if applicable) of the system it is connected to. Equipment that does not have the correct ratings shall not to be used. Manufacturers + or - variations of the equipment marked ratings cannot be allowed as a justification for use if the marked ratings do not match the system ratings e.g. 460 volts motors are not to be used on 480 volt systems, 230 volt lighting fittings are not to be used on 240 volt systems, equipment rated for 50 Hz cannot be used on 60 Hz systems. Exception to the above may be allowed for US manufactured equipment but only with regard to voltage variations. The Company shall be contacted for clarification should this question arise.
2.2.2 6.3 Uninterruptible power supply (UPS) system
See annex 5:2:2:A
2.2.3 5.4 Earthing
See also NORSOK Z-010 Electrical, Instrumentation and Telecommunication Installation.
Additions to existing earthing systems should comply with the philosophy used on the platform involved. However, the vendors earthing system may be accepted if it can be documented that this is required for the CE-marking.
Different distribution systems
The requirements for the PE system are applicable irrespective of the type of distribution system employed i.e. solidly earthed neutral, high resistance earthed neutral, floating neutral, etc.
2.2.4 5.5 Lighting system
Design/earth leakage protection
Normal lighting services shall be designed in accordance with FEA-M § 1621.9 (TN-S),
§ 1623 and each circuit shall be fitted with earth fault protection with a rated sensitivity of 30 mA, see FEA-M § 1653.6. A common alarm signal for earth-fault to be distributed to central control room (CCR).
Emergency lighting circuits and other important equipment feeded from emergency distribution boards will only require a common alarm (CCR) for earth leakage. Earth leakage monitoring of each circuit are preferred. Emergency lightig circuit and other important equipment shall be equipped with signal contacts who activates both on manually and automatically operation of the breakers (to off position). A common alarm signal to be distributed to CCR. Signal contacts can be voided if actual consumers have its own internal alarm facilities which provide external alarms on lack of power.
Helideck, sea surface, aircraft warning, crane alarm lights
Helideck lighting, sea surface lighting, aircraft warning lights and crane alarm lights shall be powered from the emergency generator.
2.2.5 5.5.2 Lighting equipment
Floodlights & control gear
Floodlights & control gear shall be mounted in locations where they can be easily maintained and mounted in groups for a particular area. Flood lighting shall not be controlled by photo-electric cell or contactor.
Gauge glass, panel lights
Where general illumination is insufficient for the reading of gauge glass, panels etc. then these shall be provided with dedicated local fixtures classified for the pertinent area.
2.2.6 7.1 High voltage switchboard
Key lockers
A key locker shall be provided in switchgear areas for use in conjunction with lock-out isolation procedure. For further details see HMS Procedures & PPCoN Procedures Manual chapter 5.
2.2.7 6.2 Low voltage switchboard
Key lockers
A key locker shall be provided in switchgear areas for use in conjunction with lock-out isolation procedure. For further details see HMS Manual & PPCoN Procedures Manual chapter 5.
Motor starters shall have a thorough coordination. The type of coordination used shall be agreed upon.
2.2.8 6.5 Motors
Rating and supply fluctuations
Before an existing motor is being replaced with a motor built to a different standard (E.G. replacing a US NEMA standard motor with a European CENELEC standard motor) the actual starting and running loads of the existing machine shall be measured and these values used when selecting the replacement motor. It is not sufficient to only use the nameplate ratings on the existing motor since safety factors and operating characteristics may require a larger replacement motor if built to a different standard. Mechanical, Process and/or Drilling Departments should also be consulted prior to selecting a replacement motor. Precautions must be taken with regards to axial thrust and tolerances if the new motor shall be used on a US NEMA pump without thrust bearings. Flange adaptors can be manufactured to fit European flanged motors to US NEMA pumps.
If the old motor is damaged, measures should be taken to verify if the old motor was correctly rated.
Starting torque shall be adequate for each particular application.
2.2.9 7 RELAYS AND PROTECTION
Undervoltage release for "ESD" tripping
Where "ESD" tripping is required, the circuits concerned shall have disconnecting device who operates/trips circuits controlled by a relay which trips the disconnecting device when the relay coil is de-energized. i.e. a fail safe system (UVT). The operating voltage of this relay to be taken from an external source and as stated in the data sheets. The remote ESD signal shall de-energize the trip relay.
In case of high voltage motor starter circuits who require "ESD" tripping, the contactor operating coil shall be controlled by an undervoltage release relay. This relay shall isolate the supply to the motor anti-condensation heater when its coil is de-energized.
NOTE: Shunt trip devices shall not to be used.
ESD system battery Ex isolating breaker
The ESD system batteries shall be isolated after a YESD by tripping the Ex circuit breaker connected downstream of the batteries. The circuit breaker shall be tripped by de-energizing its undervoltage release relay. To enable this breaker to be reset, a special reset circuit is required.
This allows the undervoltage release relay to be energized for some minutes so that the breaker can be closed and the ESD system reset.
See annex 5:2:9:A
ESD power supply, drilling/platform
See annex 5:2:9:B for arrangement of ESD power supplies for platform ESD systems and drilling ESD systems.
Air flow, safety device
All duct heaters shall be safety interlocked with the air flow sensor in the ventilation duct to disconnect heaters on loss of air flow. Motor starter contacts are not acceptable as an interlock device. Local resetting of the heaters is required due to safety precautions.
2.2.10 Other requirements
Ventilation, alarms
Air flow is to be monitored by an air flow sensor and not by an auxiliary contact on the fan motor starter. An alarm shall be given on ventilation failure & the boost charge feature shall be inhibited on all chargers feeding batteries within the room.
Batteries
The batteries shall be installed within a battery room or a battery locker.
Starting batteries for fire pumps, emergency generators and other mechanical equipment shall not be mounted on the unit. They shall be allocated in a clean, dry location with suitable mechanical protection.
Vendor recommendations for care and maintenance of batteries shall be displayed in a prominent position in the battery room.