Petroleum Development Oman L.L.C.
SP-1103
Specification for Electrical Engineering Design
Document ID
SP-1103
Document Type
Specification
Security
Unrestricted
Discipline
Owner
Issue Date
Version
Electrical
UEE (CFDH-Electrical)
May-21
9.1
Keywords: This document is the property of Petroleum Development Oman, LLC. Neither the whole nor
any part of this document may be disclosed to others or reproduced, stored in a retrieval system, or
transmitted in any form by any means (electronic, mechanical, reprographic recording or otherwise)
without prior written consent of the owner.
Petroleum Development Oman LLC
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ii Document Authorisation
Authorised for Issue
Document Authorisation
Document Authority
Document Custodian
Document Reviewer
(CFDH)
Haddabi, Salim UEE
Kindi, Nabil UEE3
Siyabi, Nada UEE32
Date : 07-01-2021 12:00 AM
Date : 07-01-2021 12:00 AM
Date : 07-01-2021 12:00 AM
User Note:
The requirements of this document are mandatory. Non-compliance shall only be authorised
by the Document Owner or his Delegate through Variance Tracking Tool approval.
A controlled copy of the current version of this document is on PDO's EDMS. Before making
reference to this document, it is the user's responsibility to ensure that any hard copy, or
electronic copy, is current. For assistance, contact the Document Custodian or the Document
Author.
Users are encouraged to participate in the ongoing improvement of this document by
providing constructive feedback.
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iii Revision History
The following is a brief summary of the 4 most recent revisions to this document. Details of all
revisions prior to these are held on file by the issuing department.
Version
No.
Version
9.1
Version
9.0
Version
8.0
Version
4.0
Version
5.0
Date
May 21
Dec.
20
Dec.
19
Feb 06
Oct.,11
Author
Scope / Remarks
Al Siyabi, Nada
UEE32
Al Siyabi, Nada
UEE32
Al Siyabi, Nada
UEE32
Wim
Moelker,UIE/1
Saif Al Harthy,
UIE/4
Updated with PDO Standard Electrical equipment
requisition data sheets.
Updated & revised SP for supplement and
amendment to international standards
Version
6.0
Nov.
16
Naamani, Noora
UIE44
Version
7.0
Oct. 18
Naamani, Noora
UIE44
Updated & revised SP with DEP rev
Minor corrections/updates made
Updated clauses in line with latest issue of DEP.
Reformatted as per latest PDO SP format
Revised to harmonize with DEP Rev: Feb 2014.This
has been a major technical revision and the
changes are too numerous to list.
Re-titled, reflect continuous improvement and
address deviations.
iv Related Business Processes
Code
Business Process (EPBM 4.0)
v Related Corporate Management System (CMS) Documents
The related CMS Documents can be retrieved from the Corporate Management System
application CMS.
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TABLE OF CONTENTS
ii
Document Authorisation ................................................................................................ 3
iii
Revision History ............................................................................................................. 4
iv
Related Business Processes ......................................................................................... 4
v
Related Corporate Management System (CMS) Documents ....................................... 4
1
INTRODUCTION ........................................................................................................... 7
1.1
PURPOSE................................................................................................................................... 7
1.2
APPLICABLE STANDARDS, SPECIFICATIONS AND CODES ................................................. 7
1.3
COMPLIANCE WITH STANDARDS ........................................................................................... 7
1.4
PRODUCT/ASSET WARRANTY ................................................................................................ 7
AMENDMENT / SUPPLEMENT.................................................................................... 8
2
2.1
SITE CLIMATIC AND INDOOR CONDITIONS ........................................................................... 8
2.2
OPERATIONAL SAFETY AND RELIABILITY ............................................................................. 8
2.3
PROTECTION AGAINST EXPLOSION AND FIRE HAZARDS................................................... 8
2.4
CERTIFICATES, DECLARATIONS AND TEST REPORTS.......................................................10
2.5
ELECTRICAL SYSTEM DESIGN ...............................................................................................10
2.5.1
Renewable Power Integration Study ........................................................................11
2.6
ELECTRICAL LOADS ................................................................................................................11
2.7
SYSTEM VOLTAGES , FREQUENCY AND POWER FACTOR ................................................13
2.8
EARTHING of ELECTRICAL EQUIPMENTS .............................................................................13
2.9
ELECTRICAL PROTECTION AND PREW SYSTEM .................................................................13
2.10
ELECTRICAL SCADA ................................................................................................................13
2.11
LV & HV SWITCHGEARS for all electrical equipment . .............................................................13
2.12
UPS REQUIREMENTS ..............................................................................................................14
2.13
ELECTRIC MOTORS .................................................................................................................14
2.14
ELECTRICAL NETWORK MONITORING AND CONTROL ( ENMCS) SYSTEM......................15
2.15
CABLES, WIRES AND ACCESSORIES ....................................................................................15
2.16
OVERHEAD LINES ....................................................................................................................16
2.17
POWER AND INDUSTRIAL CONVENIENCE OUTLETS ..........................................................17
2. 17.1 Power Outlets (Substations) ..................................................................................................17
2. 17.2 Power Outlets (Plant Areas) ................................................................................................17
2. 17.3 Convenience Outlet .............................................................................................................17
2.18
GENERAL CABLING AND WIRING ..........................................................................................18
2.19
SIZING OF CABLES ..................................................................................................................18
2.20
UNDERGROUND CABLING ......................................................................................................18
2.21
CABLE MARKING / NUMBERING .............................................................................................18
2.22
HAZARDOUS AREA CABLE GLANDS .....................................................................................18
2.23
EARTHING AND BONDING ......................................................................................................19
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2.24
INDOOR SUBSTATIONS, SWITCHROOMS AND BATTERY ROOMS ....................................19
2.25
TESTING AND COMMISSIONING ............................................................................................20
2.26
PAINTING AND COATING OF ELECTRICAL EQUIPMENTS ...................................................20
2.27
TEMPORARY ELECTRICAL INSTALLATIONS and drilling rig power supply ...........................21
2.28
EQUIPMENT AND CABLE NUMBERING ..................................................................................21
2.29
SAFETY EQUIPMENTS ............................................................................................................21
2.30
POWER TRANSFORMERS.......................................................................................................21
2.31
RENEWABLE ENERGY ............................................................................................................22
2.32
LIGHTING DESIGN ...................................................................................................................22
APPENDIX -1 AC & DC Standards Voltages ...........................................................................23
APPENDIX -2
ELECTRICAL SUPPLY OF DCS/FCS PREW SYSTEMS ..............................25
APPENDIX -3 ANCILLARY ITEMS FOR SUBSTATIONS .......................................................26
APPENDIX -4 ELECTRICAL INSTRUMENT INPUT /OUTPUT SCHEDULE ..........................28
APPENDIX -5 ELECTRICAL EQUIPMENT REQUISITION DATA SHEETS ...........................29
APPENDIX A, REQUIRE ILLUMINATION LEVEL .....................................................................30
APPENDIX B, GLOSSARY of DEFINITIONS, TERMS and ABBREVIATIONS ........................32
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1 INTRODUCTION
1.1
PURPOSE
This SP is an amendment/supplement to international standards and PDO electrical equipment
standard data sheets. It contains additional and or modified requirements specific to the
Company and shall be used in conjunction with the electrical international standards.
1.2
APPLICABLE STANDARDS, SPECIFICATIONS AND CODES
All electrical standards; specifications, procedures, codes and guidelines shall be consulted
when applying the requirements of this standard. All listed documents shall be latest issue except
those prescribed by date.
1.3
COMPLIANCE WITH STANDARDS
Any deviation from this specification shall process deviations to requirements in accordance to
procedure PR-2066.
In all cases, the Company shall determine the adequacy of Works executed by the Contractor in
accordance with this Specification. For DEM-1 requirement, reference shall be made to SP-2388
and PDO DEM-1 tool.
1.4
PRODUCT/ASSET WARRANTY
The equipment shall be guaranteed to meet specified technical specifications, requisitions and
datasheets. These guarantees and particulars shall be binding and shall not be varied without
the written permission of the Company's Representative. Any deviation, concerning both
requirements and recommendations shall be identified in writing at the time of quotation.
If the guaranteed performance of the equipment is not met and/or if any component fails to
comply with the specification requirement in any respect whatsoever at any stage of
manufacture, test, erection, or operation phase the Company may reject the equipment, or
defective component and after adjustment or modification as directed by the Company's
Representative, the Vendor shall submit the item for further inspection and/or test.
All repair procedures shall not be performed without the prior approval of the Company's
Representative. In the event of a defect on any item being of such a nature that the specification
requirements cannot be fulfilled by adjustment or modification, such item shall be replaced by
the Vendor, at his own expense to the entire satisfaction of the Company's Representative.
Equipment repaired to an approved procedure shall not be accepted as a permanent solution or
replacement unless the Vendor guarantees in writing that the repaired plant or component shall
have the same service life and efficiency as the component originally manufactured.
The Vendor shall also warrant all equipment and component parts against defective material,
design and /or workmanship. Merely extending a Sub-Vendor’s warranty is not acceptable.
The approval of the Company's Representative of inspection and/or test results will not prejudice
the right of the Company's Representative to reject an item of equipment if it does not comply
with the contract document when erected or prove completely satisfactory in service.
Product/asset warranty shall further refer to the requirement as specified in the commercial
package of the contract document.
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2 AMENDMENT / SUPPLEMENT
SITE CLIMATIC AND INDOOR CONDITIONS
2.1
Equipment installed indoor or outdoor shall be designed for operation in environmental
conditions as specified in SP-2200 and the selection must be based on the highest figures
indicated in the SP regardless area of the location north or south.
OPERATIONAL SAFETY AND RELIABILITY
2.2
Electrical Safety Rules (ESRs) shall be in accordance with PR-2331, Electrical Safety Rules
Guideline Gu-861 and Electrical Safety Operating Procedures GU-892.
▪
Design integrity checks shall be carried out at agreed phases of a project. This include
review of tenders document that has electrical engineering input as scope of work.
The design integrity checks shall focus on and highlight the following aspects: ▪
Adherence to standards
▪
Deviation from standards
▪
Approval deviations from standards
▪
Operational Safety and reliability
▪
Interchangeability within the project or with existing equipment.
The integrity and standard compliance checks shall be carried out through.
▪
DCAF
▪
Electrical design review, or
▪
A SAFOP study, as described in SP-1145
PROTECTION AGAINST EXPLOSION AND FIRE HAZARDS
2.3
The following shall be considered;
▪
Substations and control rooms shall be located in non- hazardous areas.
▪
IEC 60079-7, IEC 60079-14, IEC 60079-15 and IEC 60079-17 shall be used for
protection rating.
▪
Hazardous area classification drawing and HAC schedule shall be referred prior
selection of electrical equipments.
▪
The equipment shall have Ex labelling details.
▪
Install the electrical equipments based on their area of classification.
▪
All components inside the electric motor correspond to the temperature class for which
the motor has been approved.
▪
Identify with specific nameplate of the electrical equipments installed in Zone-1 and
Zone- 2 areas to avoid improper/wrong replacements.
▪
Identify all the indoor areas where standard industrial light fittings can be installed
instead of flameproof equipment.
▪
For the purpose of commonality of spares and to cater the possibilities of reclassification
of areas, the same equipment suitable for use in zone 2 or zone 22 locations shall be
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installed within process installations in non-hazardous area e.g. motors, RCUs, power
and convenience outlets…etc.
Type of Zone
▪
Type of Electrical Equipment
Zone-1
Ex type approved for Zone-1
Zone-2
Ex type approved for Zone-2
Utilities area inside process facilities
Ex type approved for Zone-2
Non Hazardous
Standard Industrial weatherproof type
Indoor Area
Industrial except battery and Chemical
Storage Rooms.
Equipment in Zone 1 areas:
1. Inherently non-sparking equipment (e.g., junction boxes, terminal boxes and
luminaires) shall have type of protection 'eb'.
▪
Equipment in Zone 2 areas:
1. Inherently non-sparking equipment (e.g. junction boxes, terminal boxes and
luminaires) shall meet one of the following:
a. protection type 'ec';
b. be approved for use in a Zone 1 area.
2. Inherently sparking equipment (e.g. EHT DB) shall have type of protection 'd' .
3. Motors shall have one of the following types of protection:
a. ‘ec’ (“non sparking”) in accordance with IEC 60079-7;
b. ‘n’ in accordance with IEC 60079-15:2010, until IEC 60079-15:2010
is withdrawn.
4. Where motors in accordance with IEC 60079-7, with a rated output in excess
of 100kW, are selected for Zone 2 areas for duties other than S1, S2, S6 or
S9, they SHALL [PS] have successfully passed the tests in accordance with
clause 6.2.3.2 of IEC 60079-7.
5. Where motors in accordance with IEC 60079-15:2010, with a rated output in
excess of 100kW, are selected for Zone 2 area for duties other than S1 or S2,
they SHALL [PS] have successfully passed the tests in accordance with
clause 22.13.1 of IEC 60079-15:2010
▪
Combustible dust hazards:
Unless otherwise specified by the COMPANY, IEC 60079-10-2 shall be used for area
classification drawings. Meticulous care is taken to ensure that the temperatures of the
motor surfaces, on which dust can accumulate, remain below the temperatures stated in
the Standard. Special seals on cables and terminal boxes prevent the penetration of dust.
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2.4
CERTIFICATES, DECLARATIONS AND TEST REPORTS
All electrical equipment (Generators, bus duct, power transformer, OHL structures and
accessories, motors, VFD, UPS, Switchboards, capacitor banks, reactors, power cables,
busbars …etc) shall have type test to international IEC standards. Declaration of compliance
shall cover both main and auxiliary equipment. Further certificates or declarations relating to the
application of equipment for use in hazardous areas may be required by COMPANY to which
standard the equipment conforms.
2.5
ELECTRICAL SYSTEM DESIGN
The design of the electrical facilities shall meet the specific design criteria, philosophy
and/or objective stated in the project definition phase, e.g., in the basis of design
document or project specification, relating to a particular plant or facility. Reference to
be made to PR-1265 and SP 2199.
The conceptual designs and philosophies relating to the electrical system shall be
documented by a system design description, a key line diagram, basic layout drawings
and functional/outline specifications
System studies and protection reports, including software native files, shall be provided in
support of the design, for approval by the principle :
a.
depending on the type, size and complexity of the installation, such studies
may comprise the following taken into consideration SP 1265 requirement:
i. Load flow studies;
ii. Short circuit studies complying with IEC 60909 Parts 0, 1, 2, 3, 4;
iii. System dynamic stability and transient stability studies
iv. Protection grading studies, including relay setting schedules; relay files
and relay file converter for stationware , an arc flash study should be
carried out for low voltage switchboards and for high voltage
switchboards only if the protection grading studies show that arcing
faults cannot be cleared within the Internal Arc Classification time of
the switchgear;
v. Harmonic analysis studies include harmonic and power quality site
measurement.
vi. Motor re-starting and re-acceleration;
vii. Vital Supply recovery following total power failure, including
emergency diesel generator(s), UPS, instrumentation critical loads,
DCS, SCADA...etc.
The following are the approved softwares to carry out electrical design:
➢
PowerFactory DIgSILENT for power system analysis, (steady
state, transient, EMT, Harmonics, reliability)
➢
➢
➢
➢
➢
Page 10
PLS-CADD Power Line Systems for overhead power line
design,
CYMCAP for HV Cable sizing,
CYMGRD, Substation Grounding Program.
DIgSILENT StationWare for central protection settings
database and asset management system,
PV syst. for solar power studies
Specification for Electrical Engineering Design
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➢
➢
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Helioscope ( Web base app) for solar power studies
Windy Pro used for wind power.
2.5.1 Renewable Power Integration Study
Renewable energy is one of the main focus area for such transition where the company is
targeting to play good part in the coming years. PDO aspiration is built from the high renewable
energy resources in Oman especially in terms of year-round solar irradiation intensity and strong
wind potential. These location advantages, alongside favourable seawater temperatures and
topographical features across the length of the country provide for the potential to generate
further renewable sources ranging from green hydrogen to macro-algae and bio-fuel
developments.
In order to understand the integration challenges and have a good project plan and evaluate the
impact in integrating renewable into the grid, Renewable integration studies must be considered
to understand how to economically integrate variable generation of energy on the electric grid.
A grid integration study (analytical framework used to evaluate a power system with high
penetration levels of variable renewable energy (RE)). Generally, a grid integration study:
a. Simulates the operation of the power system under different variable RE scenarios;
b. Identifies reliability constraints; and
c.
Evaluates the cost of actions to alleviate those constraints.
d. Understand the grid code.
e. Study the generation project grid compliance.
The variable RE scenarios in a grid integration study establish where, how much, and over what
timeframe to build generation and transmission capacity, ideally capturing the spatial diversity
benefits of wind and solar resources. The results help build confidence among policymakers,
system operators, and investors to move forward with plans to increase the amount of VRE on
the grid.
For on-grid solar PV installation, reference shall be made to IEC-61853 series and for off grid
solar PV installation refer to IEC-61427. When it comes to the PV modules, Company prefer to
utilize tair ONE manufacturer as per Bloomberg ranking. However, for wind power integration,
refer to IEC-61400 series.
2.6
ELECTRICAL LOADS
Electrical loads shall be classified as performing a service, which is 'vital', 'essential', or 'nonessential'. A schedule of the installed electrical loads, the maximum normal running plant load
and the peak load, expressed in kilowatts and kilovars and based on the plant design capacity
when operating under the site conditions specified, shall be prepared using standard electrical
load list format. The schedule of installed electrical loads shall be prepared and updated
throughout the design phases of the project and will form the basis for provision of the necessary
electricity supply and distribution system capacity. During the ASSESS and SELECT phases of
a project development, a separate allowance shall be made to account for an increase in the
electrical load owing to uncertainties in the process.
The formulae used for determining the total electrical loads as below
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-
Maximum normal running plant load = x(%)E + y(%)F
-
Peak load = x(%)E + y(%)F + z(%)G
where
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E = sum of all continuously operating loads
F = sum of all intermittent loads
G = sum of all stand-by loads
x, y and z are diversity factors
The load growth allowance and values of the diversity factors (x, y, and z) shall be appropriate
to the type of plant and determined by the CFDH-E .The values of the diversity factors (x, y and
z) shall take account of the individual drives or consumers which make up the continuous,
intermittent and stand-by loads, respectively. For example, y(%)F or z(%)G cannot be less than
the largest individual intermittent or stand-by drive or consumer.
The various loads shall be classified as follows:
E - "Continuous"
All loads that may continuously be required for normal
operation, including lighting and workshops
F - "Intermittent"
Loads required for intermediate pumping, storage, loading, etc.
G -"Stand-by"
All loads required in emergencies only, such as fire-water
pumps or those of normally not running electrically driven units
in stand-by mode for normally running steam-driven ones, e.g.
charge pumps, boiler feed pumps, etc.
Spare pumps etc., e.g. the “B” pump of an A-B combination,
are not to be considered as “Stand-by” loads.
Care must be taken even though not to be considered as stand-by loads, the largest motor of
the spare duty shall be considered in the motor start studies with the duty motor running.
The following default values may be used for initial load assessments, or if the
diversity factors have not been finalised:
a.
x
=
100%.
At rated plant throughput all driven equipment is assumed to be operating at its duty point.
However, some diversity may be applied to non-process loads, e.g., offices and workshop
power and lighting, typically 90%.
b.
y
=
30%.
c.
z
=
10%.
A separate schedule shall be prepared for each switchboard, the total of all switchboard loads
being summarised as required to arrive at the maximum normal running and peak loads for each
substation and for the plant overall.
All loads to be automatically restarted after a voltage dip shall be identified as such in the
'restarting' column.
Where a group of drives operate as a unit, it shall be considered as an individual consumer.
In addition , the length and size of the load cables must be included during the load list
schedule preparation in order to have full picture during the design requirement especially on
the switchboard feeders as per the standards load list format .
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SYSTEM VOLTAGES , FREQUENCY AND POWER FACTOR
2.7
▪
System voltages and frequency, supply variations and equipment operating voltages as
per Appendix 2 of this SP.
▪
The use of non-standard voltages shall be subject to the approval by the COMPANY.
▪
For total harmonic distortion (THD) and individual harmonic voltage reference shall be
made to IEC 61000-3-6 ;
THD for system voltages up to 36 kV shall not exceed 6.5%;
THD for system voltages higher than 36 kV shall not exceed 3%.
Note must be taken that equipment, which produces a continuous DC component in the AC
supply system, shall not be utilised.
The overall system power factor, inclusive of reactive power losses in transformers and other
distribution system equipment, should not be less than 0.8 lagging at rated design throughput of
the plant. The requirement for power factor correction shall be agreed with the CFDH-E at the
DEFINE phase of the project. the method selected depends on reliability and economic
consideration.
EARTHING of ELECTRICAL EQUIPMENTS
2.8
Reference shall be made to SP-1109.
ELECTRICAL PROTECTION AND PREW SYSTEM
2.9
Reference shall be made to SP-1107.
2.10 ELECTRICAL SCADA
Reference shall be made to SP-1106.
2.11 LV & HV SWITCHGEARS for all electrical equipment .
▪
Reference shall be made to SP-1121 for LV switchgears and SP-1120 for HV
switchgears.
▪
Reference shall be made to LV and HV PDO standard switchgear data sheets (refer to
Appendix-5).
▪
Reference shall be made to PMR PDO standard data sheets (refer to Appendix-5).
▪
VESDA system shall not be implemented due to reliability issues.
▪
Under voltage release shall be provided for all Motors controlled by circuit breaker and
OHL feeders with process SIL requirement.
▪
For Low voltage motor control center facility for voltage dip ride through & Auto restart
function shall be provided. This should be coordinated with process and control and
automation disciplines.
▪
For HV motors feeders instant current and voltage waveforms per phase should be also
mapped through System 1 Condition Monitoring Software or any installed diagnostic
software used for the machine.
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▪
Fault disturbance recorders and power quality meter with GPS time synchronization
shall be provided for each switchboard. The system shall be connected to centralize
server and accessible to client PC for data analysis.
▪
Breakers feeding capacitor banks and reactors, generator breakers shall have design
consideration for switching transient and should be verified through design simulation
and calculation.
▪
For Standard Electrical Instrument input output schedule, refer to Appendix -5.
▪
All switchgears including DB, Arc Flash level Label must be fixed on the switchgear.
▪
6.6kV and 11kV switchgear shall have their control supply fed from UPS.
▪
LV motor switchgear motor control center ,control supply shall be as per SP1107
▪
Requisition shall include but not limited to include provision of OEM settings ,OEM
Operation and maintenance manuals, Bill of material , schematic and SLDs , special
tools or software require and OEM operation and maintenance training .
2.12 UPS REQUIREMENTS
▪
UPS equipment shall be selected according to the arrangements for AC and DC
uninterruptible, maintained electricity supplies for process control and safeguarding
systems.
▪
Uninterruptible, maintained electricity supply distribution switchboards and the
associated UPS units should be located as close as possible to the loads supplied.
▪
The maximum size of fuses or MCCBs used should take into account the limited short
circuit output of the UPS and the design intent to avoid switching to Bypass to clear large
faults.
▪
Altra Low Maintenance Batteries shall be used in all new Uninterruptible Power Supply
Units (UPSs) and Battery chargers.
▪
Reference shall be made to IEC 62040 for UPS system and taking into account the
design class UPS system shall consider redundant design and following UPS electrical
&instrument input /output schedule listed in appendix-4
▪
UPS requisition shall include but not limited to include provision of OEM settings OEM
installation procedures Operation and maintenance manuals, Bill of material , schematic
and SLDs , special tools or software require and OEM operation and maintenance
training .
▪
Reference shall be made to DC and AC UPS PDO standard data sheets (refer to
Appendix-5).
2.13 ELECTRIC MOTORS
▪
▪
▪
▪
Design of electric motors shall be as per IEC 60034. Frame sizes shall be as per IEC
60072-1 and IEC 60072-2.
Reference shall be made to PDO standard LV, HV, synchronous motors data sheets
(refer to Appendix-5).
Interchangeability of new motors with existing motors shall be considered during the
design.
RCUs shall normally be installed on suitable steel supports adjacent to the motor they
control. Where RCUs cannot be installed in the immediate vicinity of the motor. The
control, Safety switch shall be mounted near the motor. This applies, for instance, for fin
fan and cooling tower motors, where RCUs shall be located at grade level.
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▪
All RCUs shall have built-in ammeters except if the ammeter operationally not required
▪
No RCU for controlling motorised valves.
▪
If Motors are at ground level, the safety switch is not required.
▪
Induction motors less than or equal to 12 MW shall be considered as first option unless
there is process or electrical system constraint requirements, then synchronous motors
could be selected.
▪
requisition shall include but not limited to include provision of OEM settings , OEM
installation procedures ,OEM Operation and maintenance manuals , Bill of material ,
schematic and SLDs , special tools or software require and OEM operation and
maintenance training .
2.14 ELECTRICAL NETWORK MONITORING AND CONTROL ( ENMCS)
SYSTEM
The system solution centralizes monitoring data, control, disturbance recording and data
collection providing a window into the system for analysis and reporting through an
integrated network of metering and protection devices across a single or multiple facility
locations.
Interface with C&A, IT and telecom , cybersecurity teams should be recognized as early
stage of the project to cover design of control systems – conceptual to detailed hardware
and software design selection.
▪
Fully Redundant Configuration ( NO SINGLE POINT OF FAILURE )
▪
Open Systems (Support various manufacturer of Hardware , Software and
Communications)
▪
The full system shall have integrated FAT and SAT verification
▪
Reference shall be made to SP-1120 section 2.14
▪
ENMCS to be considered for large scale plants or sour over 200 drives.
2.15 CABLES, WIRES AND ACCESSORIES
▪
Reference shall be made to GU-920 and GU -971
▪
Paper insulated lead-sheathed cables shall not be used.
▪
Armoured cables shouldn’t be selected inside substations.
▪
For LV cables, vendor should specified the type of glands (insulated /none insulated)
can be used especially for process heater application.
▪
PVC insulation instead of XLPE for 1.1kV grade LV Cable
1. PVC cables (LV and Control) for indoor installations interconnecting the panels
within the building where the rooms are air-conditioned.
2. All cables (LV and Control) installed outdoor or interconnecting outdoor to indoor
panels shall be of XLPE type.
▪
The colour of outer sheath of HV cables shall be as per IEC 60502 and the outer sheath
of LV cables shall be black or grey.
▪
Above ground cabling shall be considered in new projects and evaluated against the
underground.
Page 15
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▪
For brown field projects, cable sizing should take into consideration the existing system
cabling for better design output.
▪
Utility trench tent or suitable protection cover shall be used in all circumstances wherever
cable termination or cable joint work is carried out in the outdoor irrespective of the
weather conditions. The termination or joint shall be made in dust free, moisture free
and clean atmosphere.
▪
Earthing arrangement during the design must be considered (single versus multi
earthing).
▪
In case cable with HDPE outer sheath is not available, copper or aluminium armoured
cable with copper screening and PVC outer sheath shall be used.
▪
Reference shall be made to cable Termination kit PDO standard data sheet (refer to
Appendix-5).
2.16 OVERHEAD LINES
▪
Wooden poles for overhead lines shall not be used.
▪
Using rod gaps (arcing horn) on the disconnectors shall not be allowed and shall provide
surge arresters instead. The existing facilities shall be modified to meet this requirement.
▪
Autoreclosures shall be provided with covers & sleeve to prevent short circuits resulted
from bird strike and be supplied from nearest fixed installation rather than from VTs.
▪
PMRs shall have the control circuit approved scheme– D owe have datasheet and
standardized scheme
▪
Jumpers shall be insulated including jumpers for spur lines.
▪
All Tap off connection in 33kV system, jumper shall be sleeved, refer to STD STD-00000000-EA-2580-91502-0002 & STD-00-000000-EA-4180-91502-0001.
▪
Underground cables for road crossings shall be avoided.
▪
Installation of fault passage indicator (FPI) for 33 kV distribution system is mandatory to
identify the faulty section of the network and restore power supplies in the shortest
possible time.
▪
Live Line Work (LLW) is more hazardous for personnel than working on electrical
equipment with the power switched off, it is therefore not default way of work to carry out
electrical tie-in to live electrical system and it is only allowed to avoid the disruption and
high economic costs of having to turn off power to large facilities to perform essential
periodic maintenance on up to 33kV distribution system. Therefore, assessment of the
requirement and method statement to carry out the LLW shall be approved by TA-2 prior
to allowing LLW.
▪
All HV cables and PMRs shall have surge arrester protections
▪
PMR battery shall have two levels of battery voltage monitoring, one for alarm and other
for trip to make PMR fail safe for process safety application.
Requisition shall include but not limited to include provision of OEM settings , OEM
installation procedures ,OEM Operation and maintenance manuals , Bill of material ,
schematic and SLDs , special tools or software require and OEM operation and
maintenance training .
▪
▪
For additional requirements, reference shall be made to the following standards:
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SP-1101
Specification for Installation of Overhead Transmission Lines
SP-1102B
Specification for Design of 33kV Overhead Power Lines on Concrete Poles
SP-1114B
Specification for Design of 132/220 kV Overhead Power Lines on Steel Towers
SP-1114C
Specification for Design of TWIN ELM 132kV Overhead Power Lines on
Concrete Poles
SP-1114D
Specification for Design of Twin ELM 132 kV Compact Overhead Power Lines
on Concrete Monopoles
SP-1106
Specification for Coding and Identification of Overhead Line Systems.
2.17 POWER AND INDUSTRIAL CONVENIENCE OUTLETS
2. 17.1 Power Outlets (Substations)
▪
At each substation, suitably located, heavy duty, weatherproof, three phase
and neutral. 5 Pin (3P+N+E), interlocked switched socket outlets, rated 125 A,
415 V, and complying with IEC 60309 standard shall be installed in the
transformer compound.
▪
a 16 A single phase, 240 V socket outlet of the IEC 60309 standard shall be
installed in the transformer compound at 20 meter intervals.
2. 17.2 Power Outlets (Plant Areas)
▪
Power outlets shall be in accordance with standard IEC 60309 and shall
comply with plant hazardous area classification. It is recommended to have an
interlock between the F&G system and MCCB to disconnect the power supply
during fire.
▪
Not more than 8 socket outlets shall be served from a single circuit derived
from a distribution board in the substation.
▪
All power outlets rated above 63 A shall be protected with an RCD operating
at 100 mA.
2. 17.3 Convenience Outlet
Page 17
▪
240 V switched socket outlets shall be provided for general purposes in all
buildings other than the above. The location of the sockets must be based on
the equipment layout requirement.
▪
Each socket outlet shall be 13 A, 3-pin and comply with the requirements of
the British Standard 1363 and shall be the interlocked, shuttered and switched
type arranged for surface or flush mounting in single or multigang units as
appropriate. All socket outlets shall be protected by an RCD (Residual Current
Device), operating at 30 mA.
▪
The socket outlets shall be installed on the ring main principle in accordance
with the current IEE Regulations for Electrical Installations'.
▪
Each fused spur outlet shall be equipped with double pole isolator, a fuse
according to British Standard 1362 or equivalent and where required with front
entry for flexible connection.
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2.18 GENERAL CABLING AND WIRING
Bus duct from high voltage power transformers which is above 20 MVA and above 2 MVA for
Low voltage transformers connected to switchboard incomers is preferred instead of cables. Bus
duct dimensions shall be routed based on the substation 3D model to avoid mismatching.
coordination between different parties is critical at early stage of the project.
▪
Cables on tray for large process facilities is encouraged.
▪
Cables on concrete trench is encouraged for power stations.
▪ Outdoor 33 kV switchrack shall not be considered for feeding process production station.
▪ 33KV switchrack design shall be avoided, especially for arrangement with more than
one incomers and more than two outgoings or arrangement with outdoor circuit breaker.
▪
Notwithstanding the above point, Switchrack should have direct OHL connections
instead of cables.
▪
Auto recloser is to take power supply from nearest reliable power supply rather than VT.
▪
For high voltage motor feeders, single core cables are preferred.
The Maximum size of multi core cables as per below table;
Voltage( kV)
2
Size (mm )
0.415
6.6
11
33
240
120
70
50
2.19 SIZING OF CABLES
▪
The copper screen and/or armour of cables shall be sized to withstand the thermal and
dynamic forces of the short circuit current and taking into consideration, the setting of
the backup protection.
2.20 UNDERGROUND CABLING
▪
The space clearance between cables electrical and other services like pipelines shall be
in accordance with PDO standard drawings STD-00-000000-EA-4006-90102-0001and
STD-00-000000-EA-4006-90104-0001.
▪
Single core cables shall be laid in trefoil formation and be braced by preformed
non-magnetic cable cleats at intervals of 2 meter.
2.21 CABLE MARKING / NUMBERING
▪
All cables except sub-circuits for lighting and socket outlets shall be identified in
accordance with cable schedules. Separate cable schedules shall be prepared for LV
and HV cables.
2.22 HAZARDOUS AREA CABLE GLANDS
Power cables are made of three main components: conductor, dielectric and sheath and proper
selection for hazardous area cable glands must be in place. cable gland size must be selected
Page 18
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to match the cable size (cable diameter). The use of sealing tape, heat shrink tube or other
materials is not permitted to make the cable fit to the cable gland.
Reference for hazardous area selection of cable gland shall be made to IEC 60079-14.
Cable glands must be suitable for cable termination of all wire armoured/unarmoured, braided
types. Criteria to be considered for gland selection are
▪
▪
▪
▪
environmental protection,
earth continuity,
cable pull out resistance
and explosive atmospheres where must be as per IEC EX or ATEX coding.
Additionally, in hazardous areas the cable gland when correctly specified according to ATEX or
IECEx certifications should prevent the migration of flammable gases and control and contain
any potential explosions.
The protection method shall meet or exceed the protection level of the equipment that the cable
gland is connected to, below table shows the cable gland protection technique
Equipment Explosion
protection type
•
•
•
•
•
Cable gland protection technique
Ex d
Ex e
Ex nR
Ex d
X
Ex e
X
X
Ex nR
X
X
X
Ex i Group II
X
X
X
EX P
X
X
X
Barrier glands are certified Ex d and shall be used in Ex e application when there is a
risk of gas migrating down a cable and in Ex nR applications where the cable is not
sealed.
The selection of the cable glands can be considered as easy to install, don’t have parts
that can get mixed up, don’t have loose parts and in general cable be inspected easily.
Selecting proper gland based on the cable construction, insulation type, outside
diameter, voltage and armour type.
medium and high voltage power cable systems with high fault current ratings require
glands with suitable short circuit protection
highly corrosive onshore applications requiring protective nickel plated or 316 grade
stainless steel glands in the oil, gas and petrochemical industries. Concerns about
toxic gas emissions in confined spaces and public buildings to maintain circuit integrity
of low smoke zero halogen cables. Levels of atmospheric moisture exposure impacting
on the ingress protection (IP) rating requirement and need for entry thread sealing
washers.
2.23 EARTHING AND BONDING
▪
Reference shall be made to SP1109 and Appendix-2 of this SP.
2.24 INDOOR SUBSTATIONS, SWITCHROOMS AND BATTERY ROOMS
▪
Substations shall be elevated such that the height from grade to the underside of lowest
beams shall not be less than 2000 mm.
Page 19
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▪
Floor steel shall be installed for mounting switchgear, level and flush with the finished
floor as per OEM requirements. The same must be applied when using the unistrut.
▪
Cable trays /Ladder shall be used for above ground cables taken into consideration
proper design of cable ladder and cable tray arrangement based on the design outcome
▪
Installation of control and relay panels of switchgear (GIS) in the same room or control
and relay panels integrated with the switchgear is acceptable.
▪
VFD and UPS equipment can be located in a dedicated room in case of big numbers of
VFD loads.
▪
AC supply duct, diffuser and lighting fixtures shall not be located above the electrical
equipments/ panels and avoid direct air flow into the panels.
▪
Refer to Appendices 1 and 4 of this SP for indoor conditions and ancillary items required
in substations.
2.25 TESTING AND COMMISSIONING
▪
Construction, Pre-commissioning and commissioning tests of electrical equipment shall
be in accordance with PR-2366, GU-325 and PDO CCMS system inspection and test
sheets.
▪
Pre-commissioning and commissioning procedures has to be reviewed and approved
by relevant TA-3 before commencing of pre-commissioning activities.
▪
Start up procedures for different scenarios like no load / full load synchronous motor
start shall be reviewed and approved by TA-3.
▪
Start up procedure for power station.
▪
Start up and connection to PDO grid for renewable energy supply.
▪
Mark up drawings shall be verified by the right technical authority.
▪
Final loaded protection settings in protective devices shall be verified by originator before
energization.
▪
Test sheets to be used shall be the Company ITRs available in electronic certification
and completions management system (CCMS).
▪
Fully completed test sheets shall be presented to the Company before any electrical
equipment is energised.
▪
Zero sequence impedance shall be performed for substation and OHL.
▪
Digital / soft copies of test results directly obtained from testing apparatus is
recommended.
2.26 PAINTING AND COATING OF ELECTRICAL EQUIPMENTS
▪
Surface preparation shall be as per SP-1246.
▪
The Company requires coating systems 3 layer marine paint to be selected for high
corrosive condition, atmospheric corrosivity category C5 M and medium durability in
accordance with ISO-12944 for outdoor installation especially in southern areas.
▪
A guarantee letter by the coating vendor shall be submitted for the Company review
and to confirm meeting this requirement.
▪
The coating shade for electrical equipment shall be RAL 7035 except fire water system
shall follow NFPA 20 .
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2.27 TEMPORARY ELECTRICAL INSTALLATIONS and drilling rig power
supply
▪
For additional requirements for specific situations, reference shall be made to the
following specifications:
SP-1110
Specification for Electrical Supply of Mobile Camps
SP-1111
Specification for Temporary Electrical Supply of Construction and
Maintenance Work
SP-1112
Electrical Specifications for Drilling Rigs.
GU-920
Electrical installation guideline
2.28 EQUIPMENT AND CABLE NUMBERING
▪
Reference shall be made to SP-2152.
2.29 SAFETY EQUIPMENTS
▪
To ensure that reasonable inspections are carried out on such miscellaneous safety
equipment to meet the requirements of Petroleum Development Oman LLC, and any
statutory legislation applicable in the Sultanate of Oman. Refer to PR-2331, GU-961,
GU-892 and related safety procedures.
▪
To ensure that suitable and APPROVED safety equipment is available for use when
SWITCHING, work or testing is carried out on HV and LV Apparatus on PDO sites. Refer
to Appendix-4.
2.30 POWER TRANSFORMERS
▪
Reference shall be made to IEC 60076 and standard PDO data sheet (refer to Appendix5).
•
All outdoor bushings, insulators and surge arresters shall be of silicon rubber. However,
for indoor applications and inside cable boxes the porcelain type may be accepted.
▪
Motors supplied from unit transformers shall have off load tap changer ± 5 % with 1.25
steps.
▪
For transformers connected with the HV/LV busduct, the interface between the
transformer and busduct general arrangements must be established in order to avoid
any inaccuracy during the design and construction.
▪
Requisition shall include but not limited to include provision of OEM settings OEM
installation procedures,OEM Operation and maintenance manuals , Bill of material ,
schematic and SLDs , special tools or software require and OEM operation and
maintenance training.
▪
Transformer type mounting on wheels mounted on rails ;
-
Page 21
Transformer wheels shall be in accordance with EN50216-4 with zinc
plating and hot dip galvanizing
Detailed general arrangement drawing showing the spacing of wheels in
either direction of motion, foundation plan showing loading on each wheel
land jacking points with respect to centre line of TX and wheel locking
arrangement shall be furnished.
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-
-
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Suitable channels for movement of roller with transformer shall be space
accordingly, rollers wheel shall be provided with suitable rollers bearings,
which will resist rust and corrosion and shall be equipped with fittings for
lubrication. It shall be possible to swivel the wheels in two directions, at the
right angle to or parallel to the main axis of the transformer.
Wheel shall have the following mechanical characteristics: Permanent max.
load, short duration max. load and transversal static thrust.
Sliding rollers shall have the name /mark of the manufacture.
2.30.1 Oil containment and fire wall.
A transformer fire wall serves as a fire containment barrier between one oil filled
transformer and another neighbouring transformer. Affective TX firewall must be made
from materials that can withstand the intense heat and long duration of TX oil fires. They
must be designed such that both thermal and mechanical requirement are met before,
during and after the fire.
Where inadequate separation from buildings, adjacent transformers and equipment,
fire wall can be used to reduce the risk of a transformer fire causing damage to
adjacent assets. Recommendation from guidelines based on heat flux indicates that
barriers non-combustible walls should be provided of the heat flux in event of a fire is
likely to exceed 5KW/m2 at adjacent building or transformers. Such barrier extends 1 m
beyond the potential fire pool perimeter/oil containment area and 1 m above the height
of the bushings and conservator. Fire rated barriers are typically should have a fire
rating of at last 2 hrs.
Oil containment is important from a fire risk reduction strategy and from an
environmental protection point of view. The volume of the bunding and the 35mm
stone must be enough to hold the total volume of oil from the transformer at 100 mm
below the surface of the stones. Normally the require pit volume = empty pit volume
minus the calculated exact volume of the stone backfill.
▪
Refer to IEC 61936-1 for the recommended separation distances between outdoor
transformer and buildings.
▪
Transformer fire wall and oil containment pit design shall be carried out by civil
engineering.
2.31 RENEWABLE ENERGY
▪
Reference shall be made to ISO/IEC 13273 & GU 951.
2.32 LIGHTING DESIGN
▪
Conventional light fixtures shall not be used. Light Emitting Diode (LED) shall be used
for all indoor and outdoor installations.
▪
A maintenance factor of 90% for indoor installations and 80 % for outdoor installations
shall be used in design calculations and the lumen output of lamps shall be 'average
through life' value.
▪
For illumination Lux levels, reference shall be made to this SP - Appendix A.
▪
Depend on the no. of LED light fixtures fixed on a circuit, inrush current should be
considered during the MCB selection.
Page 22
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APPENDIX -1 AC & DC Standards Voltages
1.
AC Standard Voltages
132 kV
33 kV
15kV
11 kV
6.6 kV
690 V
415 V
( note-10)
Nominal system
voltage
132 kV
33 kV
15kV
11 kV
6.6 kV
690V
415 V
Highest system
voltage
145 kV
36 kV
17.5
12 kV
7.2 kV
1.1
1.1
Frequency
50 HZ
50 HZ
50 HZ
50 HZ
50 HZ
50 HZ
50 HZ
Lightning
Impulse
withstand
voltage
650 kV
(peak)
170 kV
(peak)
95 kV
75 kV
(peak)
60 kV
(peak)
20 kV
20 kV
Power frequency
withstand
voltage for 1
minute
275kV
(rms)
70 kV
(rms)
38 kV
28 kV (rms)
20 kV
(rms)
10 kV
10 kV
(rms)
Steady state
voltage
+ / - 10
%
+/-5%
+/-5%
+/-5%
+/-5%
+/-5
%
+/-5%
Steady state
frequency
+/-2%
+/-2%
+/-2%
+/-2%
+/-2%
+/-2
%
+/-2%
25 kA
for 3
sec
25 kA for
3 sec
As per
individual
project
spec
As per
individual
project spec
As per
individual
project
spec
As per
individu
al
project
spec
50 kA
for 1sec
Earthed
through
resistance
Earthed
through
resistance
Solidly
earthed
Solidly
earthed
(rms)
Supply variations
Fault levels
System fault
level at rated
voltage (3 ph
syml)
System Earthing
(SP1103/1109)
Solidly earthed
(note-1)
2.
Auxiliary Standard Voltages
Auxiliary DC voltage
: 110 V DC
Auxiliary DC voltage for Telecommunications
/ PLCC/SCADA
: 48 V DC-to be checked
Auxiliary AC voltage
: 240 V AC single phase, 415 V AC 3 phase
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3.
Equipment Operating Voltages
Equipment shall be suitable for operation at the following voltages:
Motors up to 160 kW:
0.415 kV ( note-2)
Motors above 160 kW and up to 3MW:
6.6 kV ( note-3)
Motors above 3 MW:
6.6 kV or 11 kV ( note-4)
Process Heaters above 1000 kW:
650 V – 750 V (note-8)
Lighting supply:
415/240 V; 3 phase & neutral
Lighting systems:
240 V; phase & neutral
Instruments (non-vital):
240 V; phase & neutral
Instruments (vital):
240 V; phase & neutral (see note 5)
Instruments (vital):
24 V DC floating
Welding outlets:
415 V; 3 phase & neutral
Convenience outlets:
240 V; phase & neutral
Switchgear closing:
110 V DC floating
Switchgear tripping:
110V DC floating
Electrical SCADA system:
110 V DC positive earth, to be checked
Notes:
1.
Refer to section 2.7
2.
A study should be carried out during the SELECT or early in the DEFINE phase of the
project for the possible selection of 690 V for supply of larger LV motors.
3.
Control voltage for contactors of motor feeders 6.6 kV and above is supplied from UPS. Motors
shall be fed by unlatched contactor as long as there is fuse –contactor coordination. Double fuse
arrangement per phase is not acceptable.
4.
5.
Preferred voltage for HV motors is 6.6 kV or 11 kV through unit transformers (techno commercial
study shall be provided to verify selection scheme in terms of voltage, unit transformer and motor
type (Induction versus synchronous).
Supply from Uninterruptible Power Supply System (UPS).
6.
All contactor feeders in LV switchboard shall be fed from 110 V DC power supply.
7.
PMR control supply shall be fed from nearest UPS supply or nearby LV switchboard in case of
non availability of UPS in the near vicinity of 500 m. Beyond this OHL VT can be used.
8.
For process heaters, dedicated transformers shall have secondary voltage as per OEM
recommendation. No socket outlets or any other equipment shall be connected on this power
supply
15 kV is normally used for frame 9 E generators.
9.
10.
Dynamic voltage at motor terminals from rated equipment voltage is +10% or -20% or as per
motor OEM recommendation.
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APPENDIX -2
SYSTEMS
Revision:9.1
Effective: May-21
ELECTRICAL SUPPLY OF DCS/FCS PREW
The following electrical supply shall be provided for DCS/FCS instrumentation system
equipment.
1.
OPERATOR CONSOLES
Voltage :
240 V a.c. + 10%; Frequency: 50 Hz + 2%
One normal feed and one feed from an uninterruptible supply into the Operator Console
for internal distribution. Each shall be capable of 100% duty.
2.
PRINTERS
Voltage :
240 V a.c. + 10%, Frequency: 50 Hz + 0.5 Hz
For each printer one feed from an uninterruptible supply up to and including a wall socket
within 2 metres of the printer. The sockets shall be coloured red to clearly indicate an
uninterruptible supply. A power cable and plug to connect from the sockets to each
printer shall be provided.
3.
AUXILIARY ROOM CABINETS
Voltage :
240 V ac. + 10%, -15%, Frequency: 50 Hz + 2%
Two feeds from an uninterruptible supply into each auxiliary room cabinet for internal
distribution. Each feed shall be capable of 100% duty.
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APPENDIX -3 ANCILLARY ITEMS FOR SUBSTATIONS
Substations shall be equipped with the following minimum ancillary items.
1.
2.
3.
4.
NOTICES:
▪
All designated entrances to all substations shall be fitted with an APPROVED
DANGER sign as per STD-00-000000-EA-2580-90001-0001.
▪
A standard notice which gives directions regarding the resuscitation of persons
suffering from the effects of an electric shock shall be fitted in the substation.
▪
A substation identification sign mounted outside at each end of the building to
clearly identify it from all other substations. A notice shall be posted which
identifies the CONTROL PERSON responsible for the substation and his
contact telephone number.
INFORMATION:
▪
A Switchgear Operating Procedure for each types of switchgear is fitted in
individual switchgear installed in the substation.
▪
Drawings for all types of installed equipment inside the substation e.g.
switchgear, VFDs, power transformers including the tap changer, the batteries,
UPS and battery chargers.
EQUIPMENT:
▪
First aid kit in cabinet.
▪
Electrocuted person rescue kit
▪
Telephone with a list of telephone numbers of all emergency services, control
rooms, other substations and associated power stations.
▪
A single line diagram to indicate the position of all circuit breakers and
disconnectors.
▪
All major substations containing oil filled switchgear shall be provided with a fire
proof blanket.
▪
Portable wooden / Aluminium or non conductive material teps shall be provided
suitable for all maintenance purposes within the substation building.
▪
Switchgear operation, maintenance and test equipment in secure wall mounted
storage cupboards.
▪
High voltage test and phasing sticks in wall mounted storage box.
▪
General storage cabinet, Key safe, Log book, Portable emergency torch, HV
mate, Trolley for breakers and heavy cubicles...etc.
▪
A suitable rack for storage of the standard signs DANGER, CAUTION and
EARTHING.
TECHNICAL DATA:
Page 26
▪
Schematics for protection systems installed. It should be made in such a way
that schematic is kept in different folder for different schemes.
▪
Wiring diagrams for switchgear and associated control panels.
Specification for Electrical Engineering Design
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5.
Revision:9.1
Effective: May-21
▪
Schematics for transformer tap changer and automatic voltage control system
installed.
▪
Wiring diagrams for tap changer and automatic voltage control system.
▪
Setting figures for all protection relays including any winding or oil temperature
alarms or trips. Cutting in' temperature figures for fans and/or pumps from
transformer instruments.
▪
Any other technical data assisting maintenance or post-fault investigations on
site.
LOCKS:
Access doors or gates to substations or switchyards shall be provided with approved
master lock. The master lock is manufactured by UNION (UK) and shall be provided with
a unique serial number. The locks shall be procured via SAP system. The details of the
required locks vary according to their application, and they are stipulated as below;
Sr.
1
Type
CCRK/OHL, Size : 50mm
Series HT, Size :
UNION,3104,HT,BRASS,31mm
Series LT, Size :
UNION,3104,LT,BRASS,31mm
HMKN, Size : 50mm
HMKN, Size : 25X25mm (RIM TYPE
CYLINDER)
2
3
4
5
▪
Application
Switchyard gates and HV Isolator
HV Isolation
LV Isolation
Substation Access gates
Substation Control Buildings
doors
For items 2 and 3, it is recommended to have a shackle diameter of minimum of 5 mm
to fit all purposes. Need to have requirement ( check the datasheet ) on the cubical on
locking
Page 27
Specification for Electrical Engineering Design
Printed 08/09/21
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Revision:9.1
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APPENDIX -4
ELECTRICAL INSTRUMENT INPUT /OUTPUT
SCHEDULE
Electrical_Instrument_ IO Schedule.xlsx
Page 28
Specification for Electrical Engineering Design
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APPENDIX -5
SHEETS
Revision:9.1
Effective: May-21
ELECTRICAL EQUIPMENT REQUISITION DATA
PDO STD Data Sheet for LV Motor .xlsx
PDO STD Data Sheet for LV Motor VSD up to160kW.xlsx
PDO STD Data Sheet for LV Motor with Cooler Fan .xlsx
PDO STD Data Sheet for crane LV Motor_ (003).xlsx
PDO STD Data Sheet for HV Motor .xlsx
PDO STD Data Sheet for HV Motor with UTX .xlsx
PDO STD Data Sheet for Synchronous Motor.xlsx
PDO STD Data Sheet for Distribution Transformer .xlsx
PDO STD Data Sheet for Power Transformer.xlsx
PDO STD Data Sheet for Transformer UTX .xlsx
PDO STD Data Sheet for HV Switchgear.xlsx
PDO STD Data Sheet for LV Switchgear.xlsx
PDO STD Data Sheet for DC UPS.xlsx
PDO STD Data Sheet for AC UPS.xlsx
PMR Data Sheet
PDO STD Data Sheet for Termination kits .xlsx
PDO STD Data Sheet for NER.xlsx
Page 29
Specification for Electrical Engineering Design
Printed 08/09/21
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Revision:9.1
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Petroleum Development Oman LLC
APPENDIX A, REQUIRE ILLUMINATION LEVEL
Location
Emean
(Lux)
CONTROL ROOMS
General, including front of panel
Rear of panels
Auxiliary rooms
Outside, near entrances
PLANT AREAS
Operating areas requiring regular
operator intervention
300/500
150
150/300
150
pumps, compressors,
generators, drivers,
valves, manifolds,
loading arms, etc.
Local control and monitoring
indicating instruments,
gauges and control
points
devices
Level gauges (see-through) to be lit from behind by single
tube fluorescent luminaries
Access ways:
walkways, platforms,
stairways, ladders,
module roofs
(offshore)
150
Plant and jetty approaches and road intersections
Non-operational areas with limited attendance, e.g. tank
farms without equipment requiring regular operator
intervention.
Loading gantries:
top loading, walkways
and top of tankers
5
0.5
bottom loading
(coupling handling
area)
Road tanker parking area
Notes
1, 7
2
3
75
25
150
150
25
NON-PLANT AREAS
Switchrooms, including relay and auxiliary rooms
200
Workshops and garages
indoor general
250
3
local on workbenches
and machine tools
400
4
outdoor storage and
handling areas
50
Page 30
Specification for Electrical Engineering Design
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Location
Warehouses and stores
Emean
(Lux)
indoor between
storage racks
150
bulk storage
50
outdoor storage areas
5
Laboratories and analyser rooms
400
Street lighting and fence lighting
3
Notes
5, 6, 8
NON-INDUSTRIAL AREAS
Canteens (dining areas)
Car parks
100
1
Catering areas (food preparation and serving)
300
Communications rooms
400
Computer rooms
400
Conference rooms
400
Corridors and stairways
100
Drawing offices
400
First aid rooms
400
Libraries and reading rooms
400
Lifts
100
Offices
400
Plant rooms
150
Print rooms
250
Reception areas
300
Store rooms
150
Toilets and locker rooms
Page 31
7
150-400
Recreation rooms and lounges
NOTES:
7
100
1. 300 lux applies at night and 500 lux during the daytime. Control of the illumination level down
to 100 lux should be possible either by switching off rows/groups of luminaires, or by use of
electronic dimmers, or both.
2. 150 lux applies for normal access and 300 lux for maintenance activities. The illumination level
should be controlled by switching each lamp in a twin fitting from separately controlled circuits
or by switching alternative fittings.
3. Where overhead travelling cranes are installed, floodlights should be fitted under the crane
beam to provide an illumination level of 400 lux for better illumination during maintenance.
4. In areas where very fine work is carried out, local lighting with higher illumination levels may
be required, e.g. 750 – 1000 lux on an instrument workshop bench.
5. Higher illumination levels apply where security fence lighting is required, e.g. for use with video
camera surveillance. These should be specified to be compatible with the video system
utilised.
6. At the security barrier and checkpoint in front of site entrance gatehouses, higher illumination
levels may be required.
7. In rooms where VDUs are permanently installed, the lighting shall be designed to avoid
reflections and glare from the screens.
Specification for Electrical Engineering Design
Printed 08/09/21
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Revision:9.1
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Petroleum Development Oman LLC
Location
Emean
(Lux)
Notes
8. Siting of lighting fixtures should avoid shadows and illuminate the ground evenly.
APPENDIX B, GLOSSARY of DEFINITIONS, TERMS and
ABBREVIATIONS
The following terms and abbreviations used in this document are defined below:
General Terminology
Company:
Petroleum Development Oman LLC
Principal:
The person or organisation that specifies the requirements
a contract and pays the contractors and vendors for their
services, materials and equipment.
Purchaser:
The person or department in PDO or an authorised contractor on
behalf of PDO, places order for equipment / materials with
Supplier
Supplier:
The person or organisation that receives order for supply of
equipment / materials to the Company or on behalf of the
Company
Contractor:
The person or organisation that supplies the company with
services.
Vendor:
The person or organisation that supplies the company with
materials and/or equipment.
Discipline:
A specific set of technical knowledge and skills
Corporate Functional Discipline
Head (CFDH-E):
The person within the Company responsible for the discipline to
which the specification belongs. The CFDH-E approves the
Specifications that apply to Electrical discipline
User:
The person or organisation that reads, and uses the information,
in this and other Specifications
Shall:
Indicates a requirement
Should:
Indicates a recommendation
May:
Indicates a possible course of action
Page 32
Specification for Electrical Engineering Design
in
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Revision:9.1
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ABBREVIATIONS
AC
AVR
CFDH
GIS
OEM
PDO
PR
SP
VESDA
EHT
VT
Page 33
ALTERNATING CURRENT
AUTOMATIC VOLTAGE REGULATOR
CORPORATE FUNCTIONAL DISCIPLINE HEAD
GAS INSULATED SWITCHGEAR
ORIGINAL EQUIPMENT MANUFACTURER
PETROLEUM DEVELOPMENT OMAN LLC
PROCEDURE (PDO)
SPECIFICATION (PDO)
VERY EARLY SMOKE DETECTOR ALARM
ELECTRICAL HEAT TRACING
VOLTAGE TRANSFORMER
Specification for Electrical Engineering Design
Printed 08/09/21
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Revision:9.1
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Petroleum Development Oman LLC
SP USER-COMMENT FORM
SP User-Comment Form
If you find something that is incorrect, ambiguous or could be better in an SP, write your
comments and suggestions on this form. Send the form to the Document Control Section
(DCS). They make a record of your comment and send the form to the correct CFDH. The
form has spaces for your personal details. This lets DCS or the CFDH ask you about your
comments and tell you about the decision.
SP Details
Number:
Page number:
Comments:
Title
Issue Date:
Heading Number:
Figure Number:
Suggestions:
User’s personal details
Name:
Ref. Ind:
Signature:
Date:
Phone:
Document Control Section Actions
Comment Number:
Dates
Recd:
To CFDH:
CFDH
Ref. Ind:
CFDH Actions
Recd
Date:
Page 34
Decision:
Reject:
Accept, revise at next issue:
Accept, issue temporary amendment
Inits:
Specification for Electrical Engineering Design
Ref.
Ind:
Date:
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Comments:
Originator
Advised:
Page 35
Date:
Inits:
Document
Control Section
Advised:
Specification for Electrical Engineering Design
Date:
Inits:
Printed 08/09/21
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