b771618p00
DESCRIPTION
CalculationsTRANSCRIPT
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DOC
U27 P
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PROJECT SPECIFICATIONS
CABLE SELECTION CALCULATIONS
CARBON DIOXIDE CAPTURE AND INJECTION FACILITIES
UTHMANIYAH
TH
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RAW
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AN
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EDSD/2616-0399.doc
Saudi Aramco 2616-ENG (03/99)
c
SAUDI ARABIA
REV.NO. SHT.NO. DRAWING NO. INDEX PLANT NO. DWG.TYPE
SAUDI ARABIAN OIL COMPANY
E- B 771618
U27
CARBON DIOXIDE CAPTURE & INJECTION FACILITIES- UTHMANIYAH
UTHMANIYAH
CABLE SIZING CALCULATIONS
ISSUED FOR CONSTRUCTION
-
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DATE:
DATE:
DATE:
DATE:
DATE:
DA
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BY
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CO
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CONSTRUCTIONAGENCY
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2 OF 20
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U27 P
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879
10
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879
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2
07/3
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2
B
00
PROJECT SPECIFICATIONS
CABLE SELECTION CALCULATIONS
CARBON DIOXIDE CAPTURE AND INJECTION FACILITIES
UTHMANIYAH
TH
IS D
RAW
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AN
D T
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NFO
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EDSD/2616-0399.doc
Saudi Aramco 2616-ENG (03/99)
c
SAUDI ARABIA
REV.NO. SHT.NO. DRAWING NO. INDEX PLANT NO. DWG.TYPE
SAUDI ARABIAN OIL COMPANY
E- B 771618
TABLE OF CONTENTS
1. SCOPE 3
2. REFERENCE CODES AND STANDARDS 3
2.1 Applicable Codes and Standards & Project Specifications 3
2.2 Saudi Aramco Engineering Standards 3
3. DESIGN CONSIDERATION 4
3.1 System Voltage 4
3.2 Criteria for Cable Selection 4
3.3 Design Conditions 4
3.4 Current Carrying Capacity of Power Cables 5
3.5 Average Earth Thermal Resistivity 5
3.6 Allowable Voltage Drop 6
3.7 Cable Type 7
4. CALCULATIONS AND BASIS FOR SHORT CIRCUIT WITHSTAND CAPACITY OF
POWER CABLES 8
4.1 Data for 13.8kV and 4.16kV System 8
5. FORMULAS 9
5.1 For 13.8kV VCB Feeder For VFD 10
5.2 For 480V Feeders 10
5.3 Calculations for verification of steady state voltage drop criteria 11
5.4 Verification of Voltage drop criteria in terms of motor starting 13
5.5 Verification of Ampacity 14
6. CONCLUSION 14
7. APPENDIX 14
8. ATTACHMENTS 14
Appendix 1: Thermal Conductivity Test Report 15
Attachment 1-1: Cable Ampacities 17
Attachment 1-2: Cable Ampacity Correction Factors 17
Attachment 2 : 13.8kV HV Power Cable Selection Table 18
Attachment 3 : LV Power Cables Selection Table 19
Attachment 4 : Cable sizing & voltage drop calculation 20
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DATE:
DATE:
DA
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CONSTRUCTIONAGENCY
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3 OF 20
DOC
U27 P
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00 BI-10-00879-0001
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10
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879
10
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879
11/2
6/1
1
03/1
4/1
2
07/3
0/1
2
B
00
PROJECT SPECIFICATIONS
CABLE SELECTION CALCULATIONS
CARBON DIOXIDE CAPTURE AND INJECTION FACILITIES
UTHMANIYAH
TH
IS D
RAW
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AN
D T
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NFO
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EDSD/2616-0399.doc
Saudi Aramco 2616-ENG (03/99)
c
SAUDI ARABIA
REV.NO. SHT.NO. DRAWING NO. INDEX PLANT NO. DWG.TYPE
SAUDI ARABIAN OIL COMPANY
E- B 771618
1. SCOPE
The purpose of this report is to show the suitability of selection for power cable, which applies to High Voltage and Low Voltage level for Saudi Aramco Carbon dioxide Capture and Injection Facilities Project, Uthmaniyah, Kingdom of Saudi Arabia (KSA).
2. REFERENCE CODES AND STANDARDS
2.1 Applicable Codes and Standards & Project Specifications
IEC 60502 (2005) Power Cables with Extruded Insulation and their accessories for rated voltages from 1 kV (Um = 1, 2 kV) up to 30 kV (Um = 36 kV).
IEC 60364-5-52 (2009)
Low Voltage Cable Electrical Installation
IEC 60287-3-1 Sections on operating conditions-Reference operating conditions and selection of cable type.
IEEE 141 (1993) Recommended Practice for Electric Power Distribution for Industrial Plants
PP-220002 Project Description
BE-771619 Electrical Load List.
BA-924372 Overall Electrical One Line Diagram.
BA-771625 Electrical One Line Diagram for MCC-005.
BA-771626 Electrical One Line Diagram for MCC-006.
BE-771613 Etap analysis LF, SC and MS for Uthmaniyah.
2.2 Saudi Aramco Engineering Standards
SAES-P-100 SAUDI ARAMCO ENGINEERING STANDARD Basic Power System Design Criteria
SAES-P-104 SAUDI ARAMCO ENGINEERING STANDARD Wiring Methods and Materials
15-SAMSS-502 SAUDI ARAMCO MATERIALS SYSTEM SPEC.
- Medium Voltage Power Cable 5kV through 35kV
-
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DATE:
DATE:
DATE:
DATE:
DATE:
DA
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:
BY
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CONSTRUCTIONAGENCY
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4 OF 20
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U27 P
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00 BI-10-00879-0001
ISS
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10
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879
11/2
6/1
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03/1
4/1
2
07/3
0/1
2
B
00
PROJECT SPECIFICATIONS
CABLE SELECTION CALCULATIONS
CARBON DIOXIDE CAPTURE AND INJECTION FACILITIES
UTHMANIYAH
TH
IS D
RAW
ING
AN
D T
HE I
NFO
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.
EDSD/2616-0399.doc
Saudi Aramco 2616-ENG (03/99)
c
SAUDI ARABIA
REV.NO. SHT.NO. DRAWING NO. INDEX PLANT NO. DWG.TYPE
SAUDI ARABIAN OIL COMPANY
E- B 771618
16-SAMSS-517 SAUDI ARAMCO MATERIALS SYSTEM SPEC.
- Adjustable Frequency Drive System - 1 kV and Above
3. DESIGN CONSIDERATION
3.1 System Voltage
For 13.8kV fed Loads, rated voltage of cable shall be 12/20kV. (Refer 15-SAMSS-502, Table-1)
For 5.1kV fed Loads, rated voltage of cable shall be 12/20kV. (Refer 15-SAMSS-502, Table-1)
For 0.48kV fed Loads, rated voltage of cable shall be 0.6/1kV. (Refer SAES-P-104, Section-5.3)
3.2 Criteria for Cable Selection
The sizing of power cable shall be based on the following considerations
Current carrying capacity of cables shall be in accordance to the respective load current.
Voltage drop during steady state operating conditions.
Voltage drop during motor startup conditions. (Applicable for motorized loads only)
Short circuit withstand capacity
For VFD operated motors with locked rotor amps of 110% of full load current is considered. (Refer 16-SAMSS-512 Clause-8.1.2)
For LV motors with DOL, starting current 600% of load current is taken into account with a power factor 0.2 during starting.
3.3 Design Conditions
Outdoor Exposed to Sun (for exposed cables, cables in conduit, and cables in uncovered cable trays)
Design Temperature : 60 C (Refer SAES-P-104 Section12.2)
Outdoor Shaded (for exposed cables, cables in conduit, and cables in cable trays in the shade)
Design Temperature : 50 C (Refer SAES-P-104 Section12.2)
Indoor Non-Air-conditioned
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DATE:
DATE:
DATE:
DATE:
DA
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BY
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CONSTRUCTIONAGENCY
DISCIPLINE
ENGINEER
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5 OF 20
DOC
U27 P
JO / EWO:
00 BI-10-00879-0001
ISS
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10
-00
879
10
-00
879
11/2
6/1
1
03/1
4/1
2
07/3
0/1
2
B
00
PROJECT SPECIFICATIONS
CABLE SELECTION CALCULATIONS
CARBON DIOXIDE CAPTURE AND INJECTION FACILITIES
UTHMANIYAH
TH
IS D
RAW
ING
AN
D T
HE I
NFO
RM
ATIO
N C
ON
TAIN
ED
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EIN
AR
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.
EDSD/2616-0399.doc
Saudi Aramco 2616-ENG (03/99)
c
SAUDI ARABIA
REV.NO. SHT.NO. DRAWING NO. INDEX PLANT NO. DWG.TYPE
SAUDI ARABIAN OIL COMPANY
E- B 771618
Design Temperature : 50 C (Refer SAES-P-104 Section12.2)
Indoor Air-conditioned
Design Temperature : 35 C (Refer SAES-P-104 Section12.2)
Soil Temperature
Design Temperature : 40 C (Refer SAES-P-104 Section12.2)
Therefore, the Temperature Conditions applied for CO2 Project shall be as follows:
- Aboveground Cable Installation : 50 0C
- Underground Cable Installation : 40 0C
3.4 Current Carrying Capacity of Power Cables
The power cables for Uthmaniyah shall be laid in cable trays along the main cable route considering single layer laying following correction factors as per cable vendor catalogues shall be applicable.
Ambient temperature correction factor
Grouping correction factor
The power cables from main cable tray to the respective individual load shall be buried directly; following correction factors shall be applicable:
Ground temperature correction factor
Depth of laying
Soil thermal resistivity correction factor
Cable grouping correction factor
Furthermore, based on the above correction factors the ampacity of each respective cable based on cable vendor catalogue. (Refer Attachment-1)
3.5 Average Earth Thermal Resistivity
Maximum average earth thermal conductivity values from the thermal conductivity test report is 0.32 w/mK. Calculated thermal resistivity will be 1/0.32 = 3.125Km/watt.
As per SES-P-104, CL. 12.3 If the soil thermal resistivity value is more than 120 c-cm/watt, than calculated value of thermal resistivity need to be followed
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DATE:
DATE:
DATE:
DA
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:
BY
:
CO
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BE
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PROJECTENGINEER
CONSTRUCTIONAGENCY
DISCIPLINE
ENGINEER
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6 OF 20
DOC
U27 P
JO / EWO:
00 BI-10-00879-0001
ISS
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D F
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90%
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10
-00
879
10
-00
879
10
-00
879
11/2
6/1
1
03/1
4/1
2
07/3
0/1
2
B
00
PROJECT SPECIFICATIONS
CABLE SELECTION CALCULATIONS
CARBON DIOXIDE CAPTURE AND INJECTION FACILITIES
UTHMANIYAH
TH
IS D
RAW
ING
AN
D T
HE I
NFO
RM
ATIO
N C
ON
TAIN
ED
HER
EIN
AR
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.
EDSD/2616-0399.doc
Saudi Aramco 2616-ENG (03/99)
c
SAUDI ARABIA
REV.NO. SHT.NO. DRAWING NO. INDEX PLANT NO. DWG.TYPE
SAUDI ARABIAN OIL COMPANY
E- B 771618
for cable sizing.
Hence thermal resistivity of 3.125Km/watt is followed for under ground cable sizing calculation.
3.6 Allowable Voltage Drop
Summary of Allowable Voltage Drops
Service
Overall allowable max. voltage drop
during normal operation
(As per SAES-P-100)
Feeding Source
MCC/SWG
Allowable Voltage Drop on Bus-Bar (As Per SAES-P-100)
Voltage Drop Criteria for
Cable Sizing Considered
(Satisfying Voltage drop criteria of SAES-P-100)
Allowable Max. Voltage Drop During
Motor Starting
(As per SAES-P-100)
High Voltage Motor Feeders
13.2kV VFD 10% of 13.8kV 418-SG-301 2.5% of 13.8kV 7.5% of 13.8kV 15% of 13.2kV
5.1kV VFD Driven Motor
10% of 5.1kV VFD Panel 2.5% of 5.1kV 7.5% of 5.1kV 15% of 5.1kV
Low Voltage Motor Feeders
460V Motors
10% of 480V 418-MCC-005 5% of 0.48kV 5% of 0.48kV 15% of 460V
460V Motors
10% of 480V 418-MCC-006 5% of 0.48kV 5% of 0.48kV 15% of 460V
Low Voltage Non-Motorized Feeders
480V
Utilization equipment other then
light fixtures)
10% of 480V 418-MCC-005 5% of 0.48kV 5% of 0.48kV Not Applicable
480V
Utilization equipment other then
light fixtures)
10% of 480V 418-MCC-006 5% of 0.48kV 5% of 0.48kV Not Applicable
Lighting Cables
8% of 120V Lighting Panel 3% of 0.12kV 5% of 0.12kV Not Applicable
-
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DATE:
DATE:
DATE:
DATE:
DATE:
DA
TE
:
BY
:
CO
NT
RO
L N
UM
BE
R
PROJECTENGINEER
CONSTRUCTIONAGENCY
DISCIPLINE
ENGINEER
VE
RIF
IC
AT
IO
N
ED
SD
R
EV
IS
IO
N C
ER
TIFIC
AT
E
TH
IS I
ND
ICA
TE
S T
HA
T R
EV
. N
O._
__
__
__
__
_
OF
TH
IS D
RA
WIN
G I
S C
OV
ER
ED
, F
OR
AL
L
AP
PR
OV
AL
/CE
RT
IFIC
AT
ION
RE
QU
IRE
ME
NT
S,
BY
DR
AW
ING
CO
MP
LE
TIO
N C
ER
TIF
ICA
TE
(DC
C)
NO
. _
__
__
__
__
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__
__
__
__
OPERATIONS
CERTIFIED
R
EV
IS
IO
N C
ER
TIF
IC
AT
IO
N
7 OF 20
DOC
U27 P
JO / EWO:
00 BI-10-00879-0001
ISS
UE
D F
OR
90%
DE
TA
IL D
ES
IGN
RE
VIE
W
ISS
UE
D F
OR
60%
DE
TA
IL D
ES
IGN
RE
VIE
W
IS
SU
ED
FO
R C
ON
ST
RU
CT
ION
10
-00
879
10
-00
879
10
-00
879
11/2
6/1
1
03/1
4/1
2
07/3
0/1
2
B
00
PROJECT SPECIFICATIONS
CABLE SELECTION CALCULATIONS
CARBON DIOXIDE CAPTURE AND INJECTION FACILITIES
UTHMANIYAH
TH
IS D
RAW
ING
AN
D T
HE I
NFO
RM
ATIO
N C
ON
TAIN
ED
HER
EIN
AR
E T
HE S
OLE P
RO
PER
TY O
F S
AU
DI
AR
AM
CO
. N
O R
EPR
OD
UCTIO
N I
N F
ULL O
R I
N P
AR
T S
HALL B
E O
BTAIN
ED
FR
OM
TH
IS D
OCU
MEN
T W
ITH
OU
T T
HE W
RIT
TEN
CO
NSEN
T O
F I
TS O
WN
ER
.
EDSD/2616-0399.doc
Saudi Aramco 2616-ENG (03/99)
c
SAUDI ARABIA
REV.NO. SHT.NO. DRAWING NO. INDEX PLANT NO. DWG.TYPE
SAUDI ARABIAN OIL COMPANY
E- B 771618
3.7 Cable Type
Cables for CO2 Project will be manufactured and sized as per IEC Standard.
3.7.1 Definition of Rated Voltages U0/U (Um) for cable is as follows:
U0 rated phase to ground voltage for which the cable is designed.
U rated phase to phase voltage for which the cable is designed.
Um highest system voltage for which the cable may be used (IEC
60038).
3.7.2 13.8kV and 4.16kV Cables
XLPE insulated with PVC overall sheath and Flame retardant.
Rated Voltages U0/U (Um) is as follows:
As per IEC 60502-2, refer to 15-SAMSS-502, Table 1 of Paragraph 6.3.
- 13.8kV System : 12/20kV (24kV)
- 4.16kV System : 6/10kV (12kV)
Cable Minimum Temperature rating of 90C.
Cable Maximum Temperature rating of 200C.
3.7.3 Low Voltage Power Cables
XLPE insulated with PVC overall sheath and Flame retardant.
Rated Voltages U0/U (Um) is as follows:
As per IEC 60502-1
- 480V System : 0.6/1kV (Um=1.2kV)
Cable Minimum Temperature Rating of 90C.
Cable Maximum Temperature rating of 200C.
-
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DATE:
DATE:
DATE:
DATE:
DATE:
DA
TE
:
BY
:
CO
NT
RO
L N
UM
BE
R
PROJECTENGINEER
CONSTRUCTIONAGENCY
DISCIPLINE
ENGINEER
VE
RIF
IC
AT
IO
N
ED
SD
R
EV
IS
IO
N C
ER
TIFIC
AT
E
TH
IS I
ND
ICA
TE
S T
HA
T R
EV
. N
O._
__
__
__
__
_
OF
TH
IS D
RA
WIN
G I
S C
OV
ER
ED
, F
OR
AL
L
AP
PR
OV
AL
/CE
RT
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AT
ION
RE
QU
IRE
ME
NT
S,
BY
DR
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CO
MP
LE
TIO
N C
ER
TIF
ICA
TE
(DC
C)
NO
. _
__
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CERTIFIED
R
EV
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IO
N C
ER
TIF
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AT
IO
N
8 OF 20
DOC
U27 P
JO / EWO:
00 BI-10-00879-0001
ISS
UE
D F
OR
90%
DE
TA
IL D
ES
IGN
RE
VIE
W
ISS
UE
D F
OR
60%
DE
TA
IL D
ES
IGN
RE
VIE
W
IS
SU
ED
FO
R C
ON
ST
RU
CT
ION
10
-00
879
10
-00
879
10
-00
879
11/2
6/1
1
03/1
4/1
2
07/3
0/1
2
B
00
PROJECT SPECIFICATIONS
CABLE SELECTION CALCULATIONS
CARBON DIOXIDE CAPTURE AND INJECTION FACILITIES
UTHMANIYAH
TH
IS D
RAW
ING
AN
D T
HE I
NFO
RM
ATIO
N C
ON
TAIN
ED
HER
EIN
AR
E T
HE S
OLE P
RO
PER
TY O
F S
AU
DI
AR
AM
CO
. N
O R
EPR
OD
UCTIO
N I
N F
ULL O
R I
N P
AR
T S
HALL B
E O
BTAIN
ED
FR
OM
TH
IS D
OCU
MEN
T W
ITH
OU
T T
HE W
RIT
TEN
CO
NSEN
T O
F I
TS O
WN
ER
.
EDSD/2616-0399.doc
Saudi Aramco 2616-ENG (03/99)
c
SAUDI ARABIA
REV.NO. SHT.NO. DRAWING NO. INDEX PLANT NO. DWG.TYPE
SAUDI ARABIAN OIL COMPANY
E- B 771618
4. CALCULATIONS AND BASIS FOR SHORT CIRCUIT WITHSTAND CAPACITY OF POWER CABLES
4.1 Data for 13.8kV and 4.16kV System
4.1.1 Rated switchgear short circuit currents
13.8kV System : 42kA rms
480kV System : 65kA rms
4.1.2 Total operating time of VCB feeder of 13.8kV with the inclusion of protection relay shall be as follows:
Relay Operating Time : 5 cycles
CB Interrupting Time : 5 cycles
Total Operating Time : 10 cycles (0.17 Second)
As per SAES-P-104, CL. 12.6.6 for medium voltage cables, fault duration time shall be a minimum of 110% of the clearing time of the protective device providing backup protection to the cable.
Total fault withstand time for MV cables:
= 1.1 x (Coordination time interval + Total CB operating time)
= 1.1 x (0.35+0.17) sec
=0.572 sec
4.1.4 Total operating duration for 480 V motor feeders.
As per SAES-P-104, CL. 12.6.6 for low voltage cables, fault duration time shall be a minimum of 110% of the clearing time of the protective device providing primary protection to the cable.
Total fault withstand time for LV cables:
= 1.1 x Total CB operating time
= 1.1 x 0.17 sec
=0.187 sec
-
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EN
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ER
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DATE:
DATE:
DATE:
DATE:
DATE:
DA
TE
:
BY
:
CO
NT
RO
L N
UM
BE
R
PROJECTENGINEER
CONSTRUCTIONAGENCY
DISCIPLINE
ENGINEER
VE
RIF
IC
AT
IO
N
ED
SD
R
EV
IS
IO
N C
ER
TIFIC
AT
E
TH
IS I
ND
ICA
TE
S T
HA
T R
EV
. N
O._
__
__
__
__
_
OF
TH
IS D
RA
WIN
G I
S C
OV
ER
ED
, F
OR
AL
L
AP
PR
OV
AL
/CE
RT
IFIC
AT
ION
RE
QU
IRE
ME
NT
S,
BY
DR
AW
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CO
MP
LE
TIO
N C
ER
TIF
ICA
TE
(DC
C)
NO
. _
__
__
__
__
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__
__
__
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CERTIFIED
R
EV
IS
IO
N C
ER
TIF
IC
AT
IO
N
9 OF 20
DOC
U27 P
JO / EWO:
00 BI-10-00879-0001
ISS
UE
D F
OR
90%
DE
TA
IL D
ES
IGN
RE
VIE
W
ISS
UE
D F
OR
60%
DE
TA
IL D
ES
IGN
RE
VIE
W
IS
SU
ED
FO
R C
ON
ST
RU
CT
ION
10
-00
879
10
-00
879
10
-00
879
11/2
6/1
1
03/1
4/1
2
07/3
0/1
2
B
00
PROJECT SPECIFICATIONS
CABLE SELECTION CALCULATIONS
CARBON DIOXIDE CAPTURE AND INJECTION FACILITIES
UTHMANIYAH
TH
IS D
RAW
ING
AN
D T
HE I
NFO
RM
ATIO
N C
ON
TAIN
ED
HER
EIN
AR
E T
HE S
OLE P
RO
PER
TY O
F S
AU
DI
AR
AM
CO
. N
O R
EPR
OD
UCTIO
N I
N F
ULL O
R I
N P
AR
T S
HALL B
E O
BTAIN
ED
FR
OM
TH
IS D
OCU
MEN
T W
ITH
OU
T T
HE W
RIT
TEN
CO
NSEN
T O
F I
TS O
WN
ER
.
EDSD/2616-0399.doc
Saudi Aramco 2616-ENG (03/99)
c
SAUDI ARABIA
REV.NO. SHT.NO. DRAWING NO. INDEX PLANT NO. DWG.TYPE
SAUDI ARABIAN OIL COMPANY
E- B 771618
4.1.5 Maximum Conductor Temperature
Before Short Circuit : 90 0C
After Short Circuit : 200 0C
5. FORMULAS
Based on IEEE std. 141, Paragraph 5.6.2.
Where:
I : Short Circuit Current (A)
A : Cross Sectional Area of Conductor (Circular mils)
T1 : Temperature of Conductor Before Short Circuit (0C)
T2 : Temperature of Conductor After Short Circuit (0C)
t : Short Circuit Duration (Seconds)
Therefore, the Short Circuit Current and Minimum Cross Sectional Area of Conductor in mm2 shall be as follows:
Where:
I : Short Circuit Current (A)
A : Cross Sectional Area of Conductor (mm2)
T1 : Temperature of Conductor Before Short Circuit (0C)
T2 : Temperature of Conductor After Short Circuit (0C)
t : Short Circuit Duration (Seconds)
: Conversion Factor in terms of Circular mils to mm2
234
23402970
1
210
2
T
Tlog.t
A
I
Amps.T
Tlog.
t
AI
750
100000
234
23402970
1
210
2
1
210
234
23402970
000010750mm
T
Tlog.
..tIA
750
100000
.
-
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PR
NS
EN
GG
PM
TC
ER
T
DATE:
DATE:
DATE:
DATE:
DATE:
DA
TE
:
BY
:
CO
NT
RO
L N
UM
BE
R
PROJECTENGINEER
CONSTRUCTIONAGENCY
DISCIPLINE
ENGINEER
VE
RIF
IC
AT
IO
N
ED
SD
R
EV
IS
IO
N C
ER
TIFIC
AT
E
TH
IS I
ND
ICA
TE
S T
HA
T R
EV
. N
O._
__
__
__
__
_
OF
TH
IS D
RA
WIN
G I
S C
OV
ER
ED
, F
OR
AL
L
AP
PR
OV
AL
/CE
RT
IFIC
AT
ION
RE
QU
IRE
ME
NT
S,
BY
DR
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ING
CO
MP
LE
TIO
N C
ER
TIF
ICA
TE
(DC
C)
NO
. _
__
__
__
__
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__
__
__
__
OPERATIONS
CERTIFIED
R
EV
IS
IO
N C
ER
TIF
IC
AT
IO
N
10 OF 20
DOC
U27 P
JO / EWO:
00 BI-10-00879-0001
ISS
UE
D F
OR
90%
DE
TA
IL D
ES
IGN
RE
VIE
W
ISS
UE
D F
OR
60%
DE
TA
IL D
ES
IGN
RE
VIE
W
IS
SU
ED
FO
R C
ON
ST
RU
CT
ION
10
-00
879
10
-00
879
10
-00
879
11/2
6/1
1
03/1
4/1
2
07/3
0/1
2
B
00
PROJECT SPECIFICATIONS
CABLE SELECTION CALCULATIONS
CARBON DIOXIDE CAPTURE AND INJECTION FACILITIES
UTHMANIYAH
TH
IS D
RAW
ING
AN
D T
HE I
NFO
RM
ATIO
N C
ON
TAIN
ED
HER
EIN
AR
E T
HE S
OLE P
RO
PER
TY O
F S
AU
DI
AR
AM
CO
. N
O R
EPR
OD
UCTIO
N I
N F
ULL O
R I
N P
AR
T S
HALL B
E O
BTAIN
ED
FR
OM
TH
IS D
OCU
MEN
T W
ITH
OU
T T
HE W
RIT
TEN
CO
NSEN
T O
F I
TS O
WN
ER
.
EDSD/2616-0399.doc
Saudi Aramco 2616-ENG (03/99)
c
SAUDI ARABIA
REV.NO. SHT.NO. DRAWING NO. INDEX PLANT NO. DWG.TYPE
SAUDI ARABIAN OIL COMPANY
E- B 771618
5.1 For 13.8kV VCB Feeder For VFD
Maximum Short Circuit Current of 13.8kV system is 42kA rms and the total operating time for backup protection of VCB is 0.572 second.
Therefore, Conductor Cross Sectional Area (A) in mm2 is equal to:
Therefore, the minimum conductor cross sectional area applicable for 13.8kV for motor feeder shall be 300 mm2. Furthermore, the selected minimum cable size satisfies the requirements of SAES-P-104, Table-1.
5.2 For 480V Feeders
Maximum short circuit current for LV system is 65KA. The total operating time of ACB including relay operating time is 0.18 second & 10% margin. Therefore conductor cross section area (A) in mm2 is:
Hence minimum conductor size for LV CB feeder cable shall be 240 mm2 for other out going feeder from MCC minimum size of 4 mm2 is followed as given in SAES-P-104, Table-1.
228.262 mmA
Amps.T
Tlog.
t
AI
750
100000
234
23402970
1
210
2
1023490
234200log0297.0
00001.07.50572.042000mmA
2
1
210
234
234log0297.0
00001.07.50mm
T
T
tIA
2
1023490
234200log0297.0
00001.07.50187.065000mmA
209.232 mA
-
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DATE:
DATE:
DATE:
DATE:
DATE:
DA
TE
:
BY
:
CO
NT
RO
L N
UM
BE
R
PROJECTENGINEER
CONSTRUCTIONAGENCY
DISCIPLINE
ENGINEER
VE
RIF
IC
AT
IO
N
ED
SD
R
EV
IS
IO
N C
ER
TIFIC
AT
E
TH
IS I
ND
ICA
TE
S T
HA
T R
EV
. N
O._
__
__
__
__
_
OF
TH
IS D
RA
WIN
G I
S C
OV
ER
ED
, F
OR
AL
L
AP
PR
OV
AL
/CE
RT
IFIC
AT
ION
RE
QU
IRE
ME
NT
S,
BY
DR
AW
ING
CO
MP
LE
TIO
N C
ER
TIF
ICA
TE
(DC
C)
NO
. _
__
__
__
__
__
__
__
__
__
__
OPERATIONS
CERTIFIED
R
EV
IS
IO
N C
ER
TIF
IC
AT
IO
N
11 OF 20
DOC
U27 P
JO / EWO:
00 BI-10-00879-0001
ISS
UE
D F
OR
90%
DE
TA
IL D
ES
IGN
RE
VIE
W
ISS
UE
D F
OR
60%
DE
TA
IL D
ES
IGN
RE
VIE
W
IS
SU
ED
FO
R C
ON
ST
RU
CT
ION
10
-00
879
10
-00
879
10
-00
879
11/2
6/1
1
03/1
4/1
2
07/3
0/1
2
B
00
PROJECT SPECIFICATIONS
CABLE SELECTION CALCULATIONS
CARBON DIOXIDE CAPTURE AND INJECTION FACILITIES
UTHMANIYAH
TH
IS D
RAW
ING
AN
D T
HE I
NFO
RM
ATIO
N C
ON
TAIN
ED
HER
EIN
AR
E T
HE S
OLE P
RO
PER
TY O
F S
AU
DI
AR
AM
CO
. N
O R
EPR
OD
UCTIO
N I
N F
ULL O
R I
N P
AR
T S
HALL B
E O
BTAIN
ED
FR
OM
TH
IS D
OCU
MEN
T W
ITH
OU
T T
HE W
RIT
TEN
CO
NSEN
T O
F I
TS O
WN
ER
.
EDSD/2616-0399.doc
Saudi Aramco 2616-ENG (03/99)
c
SAUDI ARABIA
REV.NO. SHT.NO. DRAWING NO. INDEX PLANT NO. DWG.TYPE
SAUDI ARABIAN OIL COMPANY
E- B 771618
5.3 Calculations for verification of steady state voltage drop criteria
The steady state voltage drop criteria verification shall be based on para-3.6 which is in accordance to the requirements of Saudi-Aramco engineering standards. A typical calculation example is provided as follows:
Where:
Vd : Acceptable steady state voltage drop along power cable in % of Nominal Voltage (Refer para-3.6)
Vr : Nominal Voltage in (V)
I : Full Load Current in (A)
L : Cable Length in (m)
R,X : Cable Resistance and Reactance (/ km)
cos : Power Factor of Motor
5.3.1 Example for HV Power Cable
For a given load current, voltage, power factor and acceptable voltage drop Vd (As per para-3.6), the maximum length of the selected power cable shall be:
Therefore,
For a given load current, voltage, power factor and acceptable voltage drop Vd (As per para-3.6), the maximum length of the selected power cable shall be:
Nominal Voltage = 4160V
Load = 1000kW motor
(%)100)(1000
))(sincos)((3
rV
LXRI dV
mXRI
VV dr
)sincos)((3
)01.0)()((1000
L
mXRI
VV dr
)sincos)((3
)01.0)()((1000
L
mXRI )sincos)((3
)01.0)(5.7)(4160(1000
L
-
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TC
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DATE:
DATE:
DATE:
DATE:
DATE:
DA
TE
:
BY
:
CO
NT
RO
L N
UM
BE
R
PROJECTENGINEER
CONSTRUCTIONAGENCY
DISCIPLINE
ENGINEER
VE
RIF
IC
AT
IO
N
ED
SD
R
EV
IS
IO
N C
ER
TIFIC
AT
E
TH
IS I
ND
ICA
TE
S T
HA
T R
EV
. N
O._
__
__
__
__
_
OF
TH
IS D
RA
WIN
G I
S C
OV
ER
ED
, F
OR
AL
L
AP
PR
OV
AL
/CE
RT
IFIC
AT
ION
RE
QU
IRE
ME
NT
S,
BY
DR
AW
ING
CO
MP
LE
TIO
N C
ER
TIF
ICA
TE
(DC
C)
NO
. _
__
__
__
__
__
__
__
__
__
__
OPERATIONS
CERTIFIED
R
EV
IS
IO
N C
ER
TIF
IC
AT
IO
N
12 OF 20
DOC
U27 P
JO / EWO:
00 BI-10-00879-0001
ISS
UE
D F
OR
90%
DE
TA
IL D
ES
IGN
RE
VIE
W
ISS
UE
D F
OR
60%
DE
TA
IL D
ES
IGN
RE
VIE
W
IS
SU
ED
FO
R C
ON
ST
RU
CT
ION
10
-00
879
10
-00
879
10
-00
879
11/2
6/1
1
03/1
4/1
2
07/3
0/1
2
B
00
PROJECT SPECIFICATIONS
CABLE SELECTION CALCULATIONS
CARBON DIOXIDE CAPTURE AND INJECTION FACILITIES
UTHMANIYAH
TH
IS D
RAW
ING
AN
D T
HE I
NFO
RM
ATIO
N C
ON
TAIN
ED
HER
EIN
AR
E T
HE S
OLE P
RO
PER
TY O
F S
AU
DI
AR
AM
CO
. N
O R
EPR
OD
UCTIO
N I
N F
ULL O
R I
N P
AR
T S
HALL B
E O
BTAIN
ED
FR
OM
TH
IS D
OCU
MEN
T W
ITH
OU
T T
HE W
RIT
TEN
CO
NSEN
T O
F I
TS O
WN
ER
.
EDSD/2616-0399.doc
Saudi Aramco 2616-ENG (03/99)
c
SAUDI ARABIA
REV.NO. SHT.NO. DRAWING NO. INDEX PLANT NO. DWG.TYPE
SAUDI ARABIAN OIL COMPANY
E- B 771618
Load Current (IL) = 162A
Pf = 0.91
Typical Resistance R (/km) = 0.343 (For 3C-70Sq. mm XLPE Insulated)*
Typical Reactance X (/km) = 0.12 (For 3C-70Sq. mm XLPE Insulated)*
Therefore,
Conclusion: The above mentioned length is the max cable length for which the 3C-70Sq. mm cable can be laid for a load of 1000kW provided the voltage drop along the power cable is under 7.5% as per the defined criteria, thus fulfilling the requirements of SAES-P-100.
5.3.2 Example for LV Power Cables
The maximum allowable length of power cable as per the given load and cable data is calculated by utilizing the following formulation:
For a given load current, voltage, power factor and acceptable voltage drop Vd (As per para-3.6), the maximum length of the selected power cable shall be:
Nominal Voltage = 480V
Load = 30kW motor
Load Current (IL) = 50.8A
Pf = 0.78
Typical Resistance R (/km) = 0.4940 (For 3C-50Sq. mm XLPE Insulated)*
Typical Reactance X (/km) = 0.0934 (For 3C-50Sq. mm XLPE Insulated)*
mXRI )sincos)((3
)075.0)(4160(1000
L
m)4146.012.091.0343.0)(162(3
)075.0)(4160(1000
L
m6.3072L
mXRI
VV dr
)sincos)((3
)01.0)()((1000
L
-
DE
SC
RIP
TIO
NR
EV
NO
.JO
/EW
OD
AT
EO
PR
NS
EN
GG
PM
TC
ER
T
DATE:
DATE:
DATE:
DATE:
DATE:
DA
TE
:
BY
:
CO
NT
RO
L N
UM
BE
R
PROJECTENGINEER
CONSTRUCTIONAGENCY
DISCIPLINE
ENGINEER
VE
RIF
IC
AT
IO
N
ED
SD
R
EV
IS
IO
N C
ER
TIFIC
AT
E
TH
IS I
ND
ICA
TE
S T
HA
T R
EV
. N
O._
__
__
__
__
_
OF
TH
IS D
RA
WIN
G I
S C
OV
ER
ED
, F
OR
AL
L
AP
PR
OV
AL
/CE
RT
IFIC
AT
ION
RE
QU
IRE
ME
NT
S,
BY
DR
AW
ING
CO
MP
LE
TIO
N C
ER
TIF
ICA
TE
(DC
C)
NO
. _
__
__
__
__
__
__
__
__
__
__
OPERATIONS
CERTIFIED
R
EV
IS
IO
N C
ER
TIF
IC
AT
IO
N
13 OF 20
DOC
U27 P
JO / EWO:
00 BI-10-00879-0001
ISS
UE
D F
OR
90%
DE
TA
IL D
ES
IGN
RE
VIE
W
ISS
UE
D F
OR
60%
DE
TA
IL D
ES
IGN
RE
VIE
W
IS
SU
ED
FO
R C
ON
ST
RU
CT
ION
10
-00
879
10
-00
879
10
-00
879
11/2
6/1
1
03/1
4/1
2
07/3
0/1
2
B
00
PROJECT SPECIFICATIONS
CABLE SELECTION CALCULATIONS
CARBON DIOXIDE CAPTURE AND INJECTION FACILITIES
UTHMANIYAH
TH
IS D
RAW
ING
AN
D T
HE I
NFO
RM
ATIO
N C
ON
TAIN
ED
HER
EIN
AR
E T
HE S
OLE P
RO
PER
TY O
F S
AU
DI
AR
AM
CO
. N
O R
EPR
OD
UCTIO
N I
N F
ULL O
R I
N P
AR
T S
HALL B
E O
BTAIN
ED
FR
OM
TH
IS D
OCU
MEN
T W
ITH
OU
T T
HE W
RIT
TEN
CO
NSEN
T O
F I
TS O
WN
ER
.
EDSD/2616-0399.doc
Saudi Aramco 2616-ENG (03/99)
c
SAUDI ARABIA
REV.NO. SHT.NO. DRAWING NO. INDEX PLANT NO. DWG.TYPE
SAUDI ARABIAN OIL COMPANY
E- B 771618
*Resistance data taken from Saudi Cable Vendor.
Therefore,
Conclusion: The above mentioned length is the max cable length for which the 3C-50Sq. mm cable can be laid for a load of 30kW provided the voltage drop along the power cable is under 5% as per the defined criteria, thus fulfilling the requirements of SAES-P-100.
5.4 Verification of Voltage drop criteria in terms of motor starting
For motor starting the voltage at the terminals of the motor being started should not drop below 85% of the nominal voltage the criteria has been verified in each of the selection table using the following formulation:
Where,
Vds : Acceptable voltage drop criteria during motor starting
Vr : Rated Voltage in (V)
I : Full Load Current in (A)
L : Cable Length in (m)
R,X : Cable Resistance and Reactance (/km)
cos : Power Factor of Motor (Assumed to be 0.2 during starting)
Special Note
Voltage drop verification of cable for the motor starting interval is carried out considering 600% full load amps and a power factor of 0.2 for DOL; however for VFD 110% of full load amps and a power factor of 0.2 are considered to simulate the starting conditions. Furthermore, the detailed simulation for motor starting is provided in etap simulated motor starting analysis.
mXRI
VV dsr
)sincos)(6(3
)01.0)()((1000
L
mXRI )sincos)((3
)05.0)(480(1000
L
m)625.00934.078.04940.0)(8.50(3
)05.0)(480(1000
L
m75.614L
-
DE
SC
RIP
TIO
NR
EV
NO
.JO
/EW
OD
AT
EO
PR
NS
EN
GG
PM
TC
ER
T
DATE:
DATE:
DATE:
DATE:
DATE:
DA
TE
:
BY
:
CO
NT
RO
L N
UM
BE
R
PROJECTENGINEER
CONSTRUCTIONAGENCY
DISCIPLINE
ENGINEER
VE
RIF
IC
AT
IO
N
ED
SD
R
EV
IS
IO
N C
ER
TIFIC
AT
E
TH
IS I
ND
ICA
TE
S T
HA
T R
EV
. N
O._
__
__
__
__
_
OF
TH
IS D
RA
WIN
G I
S C
OV
ER
ED
, F
OR
AL
L
AP
PR
OV
AL
/CE
RT
IFIC
AT
ION
RE
QU
IRE
ME
NT
S,
BY
DR
AW
ING
CO
MP
LE
TIO
N C
ER
TIF
ICA
TE
(DC
C)
NO
. _
__
__
__
__
__
__
__
__
__
__
OPERATIONS
CERTIFIED
R
EV
IS
IO
N C
ER
TIF
IC
AT
IO
N
14 OF 20
DOC
U27 P
JO / EWO:
00 BI-10-00879-0001
ISS
UE
D F
OR
90%
DE
TA
IL D
ES
IGN
RE
VIE
W
ISS
UE
D F
OR
60%
DE
TA
IL D
ES
IGN
RE
VIE
W
IS
SU
ED
FO
R C
ON
ST
RU
CT
ION
10
-00
879
10
-00
879
10
-00
879
11/2
6/1
1
03/1
4/1
2
07/3
0/1
2
B
00
PROJECT SPECIFICATIONS
CABLE SELECTION CALCULATIONS
CARBON DIOXIDE CAPTURE AND INJECTION FACILITIES
UTHMANIYAH
TH
IS D
RAW
ING
AN
D T
HE I
NFO
RM
ATIO
N C
ON
TAIN
ED
HER
EIN
AR
E T
HE S
OLE P
RO
PER
TY O
F S
AU
DI
AR
AM
CO
. N
O R
EPR
OD
UCTIO
N I
N F
ULL O
R I
N P
AR
T S
HALL B
E O
BTAIN
ED
FR
OM
TH
IS D
OCU
MEN
T W
ITH
OU
T T
HE W
RIT
TEN
CO
NSEN
T O
F I
TS O
WN
ER
.
EDSD/2616-0399.doc
Saudi Aramco 2616-ENG (03/99)
c
SAUDI ARABIA
REV.NO. SHT.NO. DRAWING NO. INDEX PLANT NO. DWG.TYPE
SAUDI ARABIAN OIL COMPANY
E- B 771618
5.5 Verification of Ampacity
Ampacity value given in vendor catalogue (Attachment 1-1) standard operating condition were corrected as per the site condition & the installation methods defined in Attachment 1-2.
Following condition is verified for each power cable:
I derated cable ampacity I Load Current
Where,
I derated cable ampacity = I standard cable ampacity (Refer Attachment 1-1) x Correction Factors (Refer Attachment 1-2)
6. CONCLUSION
This report is prepared to clarify the cable sizing basis for Inlet & Gas Treatment Project application. Saudi Cable Vendor was selected for supplier of LV & MV cables. The cable ampacity, installation method and cable derating factors are provided by Cable Vendors.
7. APPENDIX
Appendix 1 : Thermal Conductivity Test Report.
8. ATTACHMENTS
Attachment 1-1: Cable Ampacities
Attachment 1-2: Cable Ampacity Correction Factors
Attachment 2 : 13.8kV HV Power Cable Selection Table
Attachment 3 : LV Power Cable Selection Table
Attachment 4 : Cable sizing & voltage drop calculation
-
DE
SC
RIP
TIO
NR
EV
NO
.JO
/EW
OD
AT
EO
PR
NS
EN
GG
PM
TC
ER
T
DATE:
DATE:
DATE:
DATE:
DATE:
DA
TE
:
BY
:
CO
NT
RO
L N
UM
BE
R
PROJECTENGINEER
CONSTRUCTIONAGENCY
DISCIPLINE
ENGINEER
VE
RIF
IC
AT
IO
N
ED
SD
R
EV
IS
IO
N C
ER
TIFIC
AT
E
TH
IS I
ND
ICA
TE
S T
HA
T R
EV
. N
O._
__
__
__
__
_
OF
TH
IS D
RA
WIN
G I
S C
OV
ER
ED
, F
OR
AL
L
AP
PR
OV
AL
/CE
RT
IFIC
AT
ION
RE
QU
IRE
ME
NT
S,
BY
DR
AW
ING
CO
MP
LE
TIO
N C
ER
TIF
ICA
TE
(DC
C)
NO
. _
__
__
__
__
__
__
__
__
__
__
OPERATIONS
CERTIFIED
R
EV
IS
IO
N C
ER
TIF
IC
AT
IO
N
15 OF 20
DOC
U27 P
JO / EWO:
00 BI-10-00879-0001
ISS
UE
D F
OR
90%
DE
TA
IL D
ES
IGN
RE
VIE
W
ISS
UE
D F
OR
60%
DE
TA
IL D
ES
IGN
RE
VIE
W
IS
SU
ED
FO
R C
ON
ST
RU
CT
ION
10
-00
879
10
-00
879
10
-00
879
11/2
6/1
1
03/1
4/1
2
07/3
0/1
2
B
00
PROJECT SPECIFICATIONS
CABLE SELECTION CALCULATIONS
CARBON DIOXIDE CAPTURE AND INJECTION FACILITIES
UTHMANIYAH
TH
IS D
RAW
ING
AN
D T
HE I
NFO
RM
ATIO
N C
ON
TAIN
ED
HER
EIN
AR
E T
HE S
OLE P
RO
PER
TY O
F S
AU
DI
AR
AM
CO
. N
O R
EPR
OD
UCTIO
N I
N F
ULL O
R I
N P
AR
T S
HALL B
E O
BTAIN
ED
FR
OM
TH
IS D
OCU
MEN
T W
ITH
OU
T T
HE W
RIT
TEN
CO
NSEN
T O
F I
TS O
WN
ER
.
EDSD/2616-0399.doc
Saudi Aramco 2616-ENG (03/99)
c
SAUDI ARABIA
REV.NO. SHT.NO. DRAWING NO. INDEX PLANT NO. DWG.TYPE
SAUDI ARABIAN OIL COMPANY
E- B 771618
Appendix 1: Thermal Conductivity Test Report
-
DE
SC
RIP
TIO
NR
EV
NO
.JO
/EW
OD
AT
EO
PR
NS
EN
GG
PM
TC
ER
T
DATE:
DATE:
DATE:
DATE:
DATE:
DA
TE
:
BY
:
CO
NT
RO
L N
UM
BE
R
PROJECTENGINEER
CONSTRUCTIONAGENCY
DISCIPLINE
ENGINEER
VE
RIF
IC
AT
IO
N
ED
SD
R
EV
IS
IO
N C
ER
TIFIC
AT
E
TH
IS I
ND
ICA
TE
S T
HA
T R
EV
. N
O._
__
__
__
__
_
OF
TH
IS D
RA
WIN
G I
S C
OV
ER
ED
, F
OR
AL
L
AP
PR
OV
AL
/CE
RT
IFIC
AT
ION
RE
QU
IRE
ME
NT
S,
BY
DR
AW
ING
CO
MP
LE
TIO
N C
ER
TIF
ICA
TE
(DC
C)
NO
. _
__
__
__
__
__
__
__
__
__
__
OPERATIONS
CERTIFIED
R
EV
IS
IO
N C
ER
TIF
IC
AT
IO
N
16 OF 20
DOC
U27 P
JO / EWO:
00 BI-10-00879-0001
ISS
UE
D F
OR
90%
DE
TA
IL D
ES
IGN
RE
VIE
W
ISS
UE
D F
OR
60%
DE
TA
IL D
ES
IGN
RE
VIE
W
IS
SU
ED
FO
R C
ON
ST
RU
CT
ION
10
-00
879
10
-00
879
10
-00
879
11/2
6/1
1
03/1
4/1
2
07/3
0/1
2
B
00
PROJECT SPECIFICATIONS
CABLE SELECTION CALCULATIONS
CARBON DIOXIDE CAPTURE AND INJECTION FACILITIES
UTHMANIYAH
TH
IS D
RAW
ING
AN
D T
HE I
NFO
RM
ATIO
N C
ON
TAIN
ED
HER
EIN
AR
E T
HE S
OLE P
RO
PER
TY O
F S
AU
DI
AR
AM
CO
. N
O R
EPR
OD
UCTIO
N I
N F
ULL O
R I
N P
AR
T S
HALL B
E O
BTAIN
ED
FR
OM
TH
IS D
OCU
MEN
T W
ITH
OU
T T
HE W
RIT
TEN
CO
NSEN
T O
F I
TS O
WN
ER
.
EDSD/2616-0399.doc
Saudi Aramco 2616-ENG (03/99)
c
SAUDI ARABIA
REV.NO. SHT.NO. DRAWING NO. INDEX PLANT NO. DWG.TYPE
SAUDI ARABIAN OIL COMPANY
E- B 771618
-
DE
SC
RIP
TIO
NR
EV
NO
.JO
/EW
OD
AT
EO
PR
NS
EN
GG
PM
TC
ER
T
DATE:
DATE:
DATE:
DATE:
DATE:
DA
TE
:
BY
:
CO
NT
RO
L N
UM
BE
R
PROJECTENGINEER
CONSTRUCTIONAGENCY
DISCIPLINE
ENGINEER
VE
RIF
IC
AT
IO
N
ED
SD
R
EV
IS
IO
N C
ER
TIFIC
AT
E
TH
IS I
ND
ICA
TE
S T
HA
T R
EV
. N
O._
__
__
__
__
_
OF
TH
IS D
RA
WIN
G I
S C
OV
ER
ED
, F
OR
AL
L
AP
PR
OV
AL
/CE
RT
IFIC
AT
ION
RE
QU
IRE
ME
NT
S,
BY
DR
AW
ING
CO
MP
LE
TIO
N C
ER
TIF
ICA
TE
(DC
C)
NO
. _
__
__
__
__
__
__
__
__
__
__
OPERATIONS
CERTIFIED
R
EV
IS
IO
N C
ER
TIF
IC
AT
IO
N
17 OF 20
DOC
U27 P
JO / EWO:
00 BI-10-00879-0001
ISS
UE
D F
OR
90%
DE
TA
IL D
ES
IGN
RE
VIE
W
ISS
UE
D F
OR
60%
DE
TA
IL D
ES
IGN
RE
VIE
W
IS
SU
ED
FO
R C
ON
ST
RU
CT
ION
10
-00
879
10
-00
879
10
-00
879
11/2
6/1
1
03/1
4/1
2
07/3
0/1
2
B
00
PROJECT SPECIFICATIONS
CABLE SELECTION CALCULATIONS
CARBON DIOXIDE CAPTURE AND INJECTION FACILITIES
UTHMANIYAH
TH
IS D
RAW
ING
AN
D T
HE I
NFO
RM
ATIO
N C
ON
TAIN
ED
HER
EIN
AR
E T
HE S
OLE P
RO
PER
TY O
F S
AU
DI
AR
AM
CO
. N
O R
EPR
OD
UCTIO
N I
N F
ULL O
R I
N P
AR
T S
HALL B
E O
BTAIN
ED
FR
OM
TH
IS D
OCU
MEN
T W
ITH
OU
T T
HE W
RIT
TEN
CO
NSEN
T O
F I
TS O
WN
ER
.
EDSD/2616-0399.doc
Saudi Aramco 2616-ENG (03/99)
c
SAUDI ARABIA
REV.NO. SHT.NO. DRAWING NO. INDEX PLANT NO. DWG.TYPE
SAUDI ARABIAN OIL COMPANY
E- B 771618
Attachment 1-1: Cable Ampacities
Attachment 1-2: Cable Ampacity Correction Factors
-
Carbon Dioxide Capture And Injection Facilities - Uthmaniyah
Cable Ampacity SourceSaudi Cable Vendor
catalogueSaudi Cable Vendor
catalogueSaudi Cable Vendor
catalogueRemarks
Maximum Conductor Temperature 90 90 90
Ambient Air Temperature 40 N/A 40
Ground Temperature N/A 30 N/A
Reference Details Armoured Cable Amp. Data Aarmoured Cable Amp. DataUnarmoured Cable Amp.
Data
Cable TypeXLPE Insulated, armoured,
Copper ConductorsXLPE Insulated, armoured,
Copper Conductors
Copper Conductors, XLPE Insulated, Unarmoured, FR-
PVC Sheath
Rated Voltage 12/20 kV 12/20 kV 12/20 kV(24 kV)
Thermal Resistivity of Soil N/A 1.2 K.m/W N/A
Thermal Resistivity of earthenware ducts
N/A 1.2 K.m/W N/A
Depth of Laying N/A 0.8m N/A
No. of Cores Three Core Three Core Three Core
Cable Installation On Cable Ladder in Air Direct Buried in Ground On Cable Ladder in Air
Cable Arrangement Armoured Cable in Air Armoured Cable in Ground Un-Armoured Cable in Air
Cable Size (mm)Ampacity in Air
(Amps)Ampacity in Ground (Amps)
Ampacity in Air (Amps)
Remarks
50 195 185 190
70 240 220 235
95 285 265 285
120 325 295 325
150 365 330 365
185 410 370 415
240 475 420 490
300 530 460 550
400 595 510 625
500 665 560 715
Note:
1. The cable ampacity data is based on saudi cable vendor data for Project Job no. BI-10-00879-0001.
Attachment 1-1 13.8kV Cable Ampacities
DOC No. U27-P-BE-771618, Rev.B Sheet 1 of 1
-
P A G E S I X T Y F O U R
C U R R E N T C A R R Y I N G C A P A C I T Y F O R 1 2 / 2 0 K V T H R E E C O R E C A B L E S
Cross sectional
area of conductor
Nominal mm2
Current capacity
in ground
Approx
amps
Current capacity
in air
Approx
amps
Current capacity
in ground
Approx
amps
Current capacity
in air
Approx
amps
Armoured (SWA) Armoured (DST)
50 185 195 180 190
70 220 240 220 235
95 265 285 265 285
120 295 325 300 325
150 330 365 335 365
185 370 410 375 415
240 420 475 435 485
300 460 530 485 545
400 510 595 545 620
500 560 665 610 705
A R M O U R E D
Cross sectional
area of conductor
Nominal
mm2
Current capacity
in ground
Approx
amps
Current capacity
in air
Approx
amps
50 185 190
70 225 235
95 265 285
120 300 325
150 335 365
185 380 415
240 440 490
300 490 550
400 550 625
500 620 715
U N A R M O U R E D
All values are calculated in accordance with IEC 287
based on:
Continuous load conductor temperature 90C
Ground temperature 30C
Depth of burial 0.8m
Thermal resistivity of soil 1.2K.m/W
Air ambient temperature 40C
SE
CT
IO
N 6
-
Carbon Dioxide Capture Injection Facilities - Uthmaniyah
Cable Ampacity Source Saudi Cable Catalogue Saudi Cable Catalogue Saudi Cable Catalogue Remarks
Conductor Temperature 90 90 90
Ambient Air Temperature 40 N/A 40
Ground Temperature N/A 35 N/A
Reference DetailsArmored (SWA) Cable Amp.
DataArmored (SWA) Cable Amp.
DataUnarmored (SWA) Cable
Amp. Data
Cable TypeXLPE Insulated, Copper
Conductors, Armored Cable XLPE Insulated, Copper
Conductors, Armored Cable
XLPE Insulated, Copper Conductors, Unrmored
Cable
Rated Voltage 0.6/1kV 0.6/1kV 0.6/1kV
Thermal Resistivity of Soil N/A 1.2 K.m/W N/A
Depth of Laying N/A 0.5 m N/A
No. of Core Multi Core Cables Multi Core Cables Multi Core Cables
Cable Installation On Cable Ladder in Air Direct Buried in Ground On Cable Ladder in Air
Cable ArrangementReference Installation Method "E" as per IEC
603645-52 (2009)
Reference Installation Method "D2" as per IEC
603645-52 (2009)
Reference Installation Method "E" as per IEC
603645-52 (2009)
Cable Size (mm)Ampacity in Air
(Amps)Ampacity in Ground
(Amps)Ampacity in Air
(Amps)Remarks
4 39 46 38
6 50 57 48
10 67 76 67
16 89 98 88
25 120 128 118
35 149 158 142
50 182 188 175
70 229 229 220
95 280 274 272
120 322 310 316
150 368 346 363
185 420 387 418
240 491 444 496
300 557 494 571
400 - - -
500 - - -
630 - - -
Note:
1. The cable ampacity data is based on saudi cable vendor data
Attachment 1-1 480V Cable Ampacities
DOC No. U27-P-BE-771618, Rev.B Sheet 1 of 1
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P A G E F I F T Y T W O
C U R R E N T C A R RY I N G C A PA C I T Y
T H R E E A N D F O U R C O R E C A B L E S W I T H C O P P E R C O N D U C T O R S ,
X L P E I N S U L A T E D A N D P V C S H E A T H E D , 0 . 6 / 1 K V
1.5 12.1 15.4 27 22 - 22 18 -
2.5 7.41 9.45 35 29 - 29 24 -
4 4.61 5.88 45 37 46 38 31 39
6 3.08 3.93 56 46 57 48 39 50
10 1.83 2.33 76 62 76 67 52 67
16 1.15 1.47 98 80 98 88 68 89
25 0.727 0.927 128 104 128 118 90 120
35 0.524 0.669 157 125 158 142 107 149
50 0.387 0.494 187 149 188 175 129 182
70 0.268 0.343 229 183 229 220 161 229
95 0.193 0.248 276 220 274 272 196 280
120 0.153 0.197 313 251 310 316 226 322
150 0.124 0.160 350 283 346 363 258 368
185 0.0991 0.129 395 321 387 418 295 420
240 0.0754 0.0998 458 372 444 496 346 491
300 0.0601 0.0812 516 420 494 571 394 557
400 0.0470 0.0656 584 478 549 665 454 635
500 0.0366 0.0536 655 538 597 760 515 705
Cross
sectional
area
mm2
DC at 20C
Maximum
ohm/km
AC at 90C
Approx
ohm/km
Direct
laid
Approx
ohm/km
Laid in
ducts
Approx
amps
Direct
laid
Approx
amps
Free
Approx
amps
In pipes
Approx
amps
Free
Approx
amps
Conductor resistanceConductor
Unarmoured Armoured Unarmoured Armoured
In ground In air
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Carbon Dioxide Capture Injection Facilities - Uthmaniyah
Description Condition Factor Remark
Ambient Air Temperature Correction
Factor50C 0.89 Saudi Cable vendor catalogue
Cable Grouping Correction Factor
Ladder Type, 3Trays
3 Cables
(Spacing of 1 Cable O.D)
0.92 Saudi Cable vendor catalogue
Overall Derating Factor 0.819
Description Condition Factor Remark
Ground Temperature Correction Factor 40C 0.90 Saudi Cable Vendor catalogue
Depth of Laying 920 mm 0.98 Saudi Cable Vendor catalogue
Soil Thermal Resistivity Correction Factor Ave. Result is 3.125k.m/W 0.65 Saudi Cable Vendor catalogue
Cable Grouping Correction Factor
~ 2 Cable direct buried 150 mm
spacing between centers (13.8 Kv
cables)
0.84 Saudi Cable Vendor catalogue
~ 3 Cable direct buried 300 mm
spacing between centers( For 5.1
Kv cables)
0.79 Saudi Cable Vendor catalogue
Overall Derating Factor For 13.8 Kv cables 0.484
For 5.1 Kv cables 0.455
1. The correction factors applicable for above ground installation of 13.8 kV cable will be 0.819.
2. The correction factors applicable for direct buried installation of 13.8 kV cable will be 0.455
Note:
HIGH VOLTAGE CABLES
1.The above mentioned de-rating factors are based on Saudi Cable Vendor catalogue
ATTACHMENT 1-2 CABLE AMPACITY CORRECTION FACTORS
Conclusion :
Above Ground Installation, XLPE Insulated, Single Layer, 1 Cable O.D spacing, Multi-Core Cables
Under Ground Installation, XLPE Insulated, Single Layer, Touching, Multi-Core Cables Direct Buried
DOC No. B65-P-BE-771046, Rev.B 1 of 1
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P A G E S E V E N T Y
D E R A T I N G F A C T O R S F O R M E D I U M V O L T A G E C A B L E S
Single core cables
upto 150 1.10 1.07 1.04 1.00 0.95 0.87 0.81
from 185-400 1.11 1.08 1.05 1.00 0.94 0.86 0.79
from 500-630 1.13 1.09 1.06 1.00 0.93 0.84 0.77
from 800-1200 1.14 1.10 1.07 1.00 0.92 0.83 0.75
Multicore cables
upto 25 1.05 1.04 1.03 1.00 0.97 0.93 0.87
from 16-150 1.07 1.05 1.03 1.00 0.96 0.90 0.85
from 185-400 1.09 1.06 1.04 1.00 0.95 0.87 0.82
Variations in thermal resistivity of soil for cables in duct banks (average value)
Soil thermal resistivity (K.m/W)
0.8 0.9 1.0 1.2 1.5 2.0 2.5
Single core cables
upto 150 1.16 1.11 1.07 1.00 0.91 0.81 0.73
from 185-400 1.17 1.12 1.07 1.00 0.90 0.80 0.72
from 500-630 1.18 1.13 1.08 1.00 0.90 0.79 0.71
from 800-1200 1.19 1.14 1.08 1.00 0.89 0.78 0.70
Multicore cables
upto 25-150 1.14 1.10 1.07 1.00 0.93 0.84 0.76
from 185-400 1.16 1.11 1.07 1.00 0.92 0.82 0.74
Variations in thermal resistivity of soil (average value).
Soil thermal resistivity (K.m/W)
0.8 0.9 1.0 1.2 1.5 2.0 2.5
Conductor
mm2
Conductor
mm2
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D E R A T I N G F A C T O R S F O R M E D I U M V O L T A G E C A B L E S
Grouping variations for three single core cables in trefoil, and flat touching and horizontal (direct buried)
S A U D I C A B L E C O M P A N Y
P A G E S E V E N T Y O N E
M E D I U M V O L T A G E
Number of
circuits
Flat
Touching 0.15m 0.30m 0.45m
2 0.78 0.80 0.81 0.85 0.88
3 0.66 0.70 0.71 0.76 0.80
4 0.61 0.65 0.65 0.72 0.76
5 0.56 0.59 0.61 0.68 0.73
6 0.53 0.56 0.58 0.66 0.72
Grouping variations for multicore cables in flat formation (direct buried)
Number of
cables in
group
Spacing (between cable centres)
Touching 0.15m 0.30m 0.45m 0.60m
2 0.80 0.84 0.88 0.90 0.92
3 0.70 0.74 0.79 0.83 0.86
4 0.64 0.69 0.75 0.79 0.83
5 0.58 0.65 0.72 0.77 0.80
6 0.56 0.62 0.70 0.75 0.79
Grouping variations for three single core cables in trefoil, and flat touching and horizontal (in single way duct banks)
Number of
circuits
Spacing (between duct centres)
Touching 0.45m 0.60m
2 0.85 0.88 0.90
3 0.76 0.80 0.83
4 0.71 0.76 0.80
5 0.67 0.73 0.77
6 0.65 0.71 0.76
P O W E R C A B L E D I V I S I O N
Spacing (between centres of groups)
Trefoil
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P A G E S E V E N T Y T W O
D E R A T I N G F A C T O R S F O R M E D I U M V O L T A G E C A B L E S
T H E R M A L S H O RT- C I R C U I T C U R R E N T R AT I N G S
Variations for multicore cables in single way duct banks in horizontal formation
The following formulae have been derived from IEC 724:
Number of
ducts in
group
Spacing (between duct centres)
Touching 0.30m 0.45m 0.60m
2 0.88 0.90 0.93 0.94
3 0.79 0.83 0.86 0.88
4 0.74 0.80 0.83 0.86
5 0.70 0.76 0.81 0.84
6 0.68 0.74 0.79 0.83
Figure 1. Copper conductor
Ic =0.143 x q
t
Is =0.148 x q
t
Figure 2. Aluminium conductor
Ic =0.0937 x q
t
Is =0.148 xq
t
Where Ic
= Permissible short-circuit current for conductor (KA)
Is
= Permissible short-circuit current for screen (KA)
t = Short circuit time in seconds
q = Nominal conductor area in mm2 or nominal screen area in mm2
Conductor temp. before short circuit 90C
Conductor temp. after short circuit 250C
Screen temp. before short circuit 80C
Screen temp. after short circuit 250C
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0.128
0.128
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Power Cables
Table 4.2.11 Rating factors fH for grouping in airl).Multi-core cables
Arrange-ment ofcables
On thefloor
Onunper-forated
trays ~2
36
Oncableladders
Onracksor onthe wall ,-
Arrangementsfor which areductionis notrequired1)
Numberof cabletrays orcableladders
-
1
2
3
6
Clearance = cable diameter dDistancefromthe wall~ 2 cm
Number of cables
1 3 6 9
"'2an d d
0.9510.90 I0.881 0.851 0.841 ~,,/R/.
Touching cablesTouching the wall
Number of cables
1 2 6
. t
9
0.9010.8410.80 I0.751 0.731 ~/////////////////.
j
2
~"'2~ d:0.95 0.90 0.88 0.85 0.84 510.90 0.85 0.83 0.81 0.80 . . . ,~0.88 0.83 0.81 0.79 0.78 .. .. ..0.86 0.81 0.79 0.77 0.76
1.00 0.98 0.96 0.93 0.92
1.00 0.95 0.93 0.90 0.89
1.00 0.94 0.92 0.89 0.88
1.00 0.93 0.90 0.87 0.86
1.00 I0.931 0.90 10.871 0.86
The number of cablesin verticalarrangement isoptional \
3
0.95 0.84 0.80 0.75 0.73
0.95 0.80 0.76 0.71 0.69
0.95 0.78 0.74 0.70 0.68
0.95 0.76 0.72 0.68 0.66
0.95 0.84 0.80 0.75 0.73
0.95 0.80 0.76 0.71 0.69
0.95 0.78 0.74 0.70 0.68
0.95 0.76 0.72 0.68 0.66
b
0.9510.7810.7310.6810.66
The number of cablesin horizontalarrangement isoptional
~.I".,
.~~~J1l'eJ A,..w.a.ww..A. ~~
"
;.*.*.;r,.*.*.~ ..J
1) If in confined spaces or for large grouping the air temperature is increased by the heat losses from the cables, the rating factors f 8 for deviating ambienttemperatures in Table 4.2.12 shall be additionally applied.
204
userPolygonuserCalloutfollowed for HV cableuserPolygonuserCalloutfollowed for LV cable -
Carbon Dioxide Capture Injection Facilities - Uthmaniyah
ATTACHMENT 1-2 CABLE AMPACITY CORRECTION FACTORS
Description Std. Condition Design Condition Design Factor Remark
Ambient Air Temperature Correction
Factor40
50
0.89 Saudi Cable vendor catalogue
Cable Grouping Correction Factor
(Installation Method " E")
Ladder Type, 3 Trays
~ 9 Cables0.68 Saudi Cable vendor catalogue
Overall Derating Factor 0.605
Description Std. Condition Design Condition Design Factor Remark
Ground Temperature Correction Factor 35C 40C 0.95 Saudi Cable vendor catalogue
Depth of Laying 500 mm 610 mm 0.98 Saudi Cable vendor catalogue
Soil Thermal Resistivity Correction Factor 1.2 K.m/W Ave. Result is 3.125C.m/W 0.65 Saudi Cable vendor catalogue
Cable Grouping Correction Factor
(Installation Method "D2")~ 3 Cables direct buried touching 0.70
Overall Derating Factor 0.426
Note:
Above Ground Installation, XLPE Insulated, Single Layer, Touching, Multi-Core Cables
Under Ground Installation, XLPE Insulated, Single Layer, Touching, Multi-Core Cables Direct Buried
LOW VOLTAGE CABLES
Conclusion : The correction factors taken into account considering the worst case in each of the above mentioned installation shall be 0.605 and
0.426.
1. The above mentioned de-rating factors are based on Saudi Cable vendor catalogue.
DOC No. B65-P-BE-771046, Rev.B 1 of 1
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GROUP RATING FACTORS FOR CIRCUITS OF THREE SINGLE CORE CABLES IN TREFOILOR LAID FLAT TOUCHING, IN HORIZONTAL FORMATION
Number of Circuits
600/1000
Volt cables
1900/3300Volt cables
Trefoil
2
3
.1-
6
0.78
0.66
0.61
0.56
0.53
Touching"'*
Laid flat
0.81
0.70
0.64
0.60
0.57
0.80
0.68
0.62
0.58
0.55
ceo ~C?AC:~I i
Spacing of Circuits
0.15 m*
0.83
0.73
0.68
0.64
0.61
0.82
0.71
0.65
0.61
0.58
0.30m
0.88
0.79
0.73
0.73
0.71
0.86
0.77
0.72
0.68
0.66
0.45 m
0.91
0.84
0.81
0.79
0.78
0.89
0.80
0.77
0.74
0.72
0.60 m
0.93
0.87
0.85
0.85
0.82
0.91
0.83
0.80
0.78
0.76
* This spacing will not be possible for some of the larger diameter cables.
** For high current carrying cables (Le. large size) it is advisable to allow spacing between circuits. Alternatively the
most appropriate group rating factor must be applied when determining the cable size and required number of cablesin parallel.
2
3
4
5
6
0.78
0.66
0.59
0.55
0.52
GROUP RATING FACTORS FOR MULTICORECABLES IN HORIZONTAL FORMATION
* For high currentcarryingcables (Le.large size)it is advisableto allow spaci;'1gbetween circuits. Alternativelythemost appropriate group rating factor must be applied when determining the cable size and required number of cablesin parallel.
.. t:p [:'&"111
I I
PAC:N$- 0Number of Cables in Group
Spacing
Touching* 0.15 m 0.30m 0.45 m 0.60 m
2 0.81 0.87 0.91 0.93 0.95600/1000 3 0.70 0.78 0.84 0.88 0.90
volt cables4 0.63 0.74 0.81 0.86 0.89
5 0.59 0.70 0.78 0.84 0.87
6 0.55 0.68 0.77 0.83 0.87
2 0.80 0.85 0.89 0.91 0.93
3 0.68 0.76 0.81 0.84 0.871900/3000
4 0.62 0.71 0.77 0.81 0.84volt cables
5 0.57 0.63 0.73 0.78 0.82
6 0.541 0.64 0.71 0.77 0.81
userCalloutfor more than 6 LV cables 0.7 derating factor has been used with 185 mm spacinguserCalloutONLY REFERED FOR LV CABLES -
R
-
R \BLfS I"iST>\LI I'D IN \IR
Rating factors for variation in air temperature
Insulation Air temperature ('C)
25 30 35 40 45 50 55
XlPE
PVC (rated 85.C)
1.10
1.11
1.14
1.15
1.05
1.05
0.95
0.94
0.89
0.88
0.84
0.82
Group rating factors for multicore cables in flat formation..... .. . . Touching Spacing0.15m 0.3m 0.45m2
3
4
5
6
1 F"AOE SIXTY
Single core cables
up to 150 1.16 1.12 1.07 0.91 0.81 0.73
from 185-300 1.17 1.12 1.07 0.91 0.80 0.73
from 400-630 1.17 1.12 1.07 0.91 0.80 0.73
Multicore cables
up to 16 1.12 1.08 1.05 0.93 0.84 0.77
from 25-150 1.14 1.10 1.06 0.92 0.82 0.75
from 185-500 1.15 1.10 1.07 0.92 0.81 0.74
0.81 0.87 0.91 0.93
0.70 0.78 0.84 0.88
0.63 0.74 0.81 0.86
0.59 0.70 0.78 0.84
0.55 0.68 0.77 0.83
-
R~TIN(' 1.
-
R T I 1'I,j\ J:;\ ( 1 0 Ii" f (. ~ I 0 \ I I. 1 ..
{\BLf I'\ST II f I, ( TS
Rating factors for depth of laying(to centre of duct or trefoil group of ducts.)
Depth of laying (m) Single core Multi core
Group rating factors for single core cables In trefoil single way ducts, horizontal formation
Number of circuits
2
3
4
5
6
Group rating factors for multicore cables in single way ducts, horizontal formation
Number of circuits
2
3
4
5
6
T PAGE SIXTY TWO
0.50 1.00 1.00
0.60 0.98 0.99
0.80 0.95 0.98
1.00 0.93 0.96
1.25 0.91 0.95
1.50 0.89 0.94
1.75 0.88 0.94
2.00 0.87 0.93
2.50 0.86 0.92
3 or more 0.85 0.81
I .. :i
m:mnm
&, &,m. Q.rD