APPLICATION ORIENTED DESIGN OF CABLES Mrs. Rohini Bhattacharyya, Dubai cables Ltd. Mr. Nawaf Al Mohaideb, Dubai cables Ltd.
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APPLICATION ORIENTED DESIGN OF CABLES
Mrs. Rohini Bhattacharyya, Dubai cables Ltd.
Mr. Nawaf Al Mohaideb, Dubai cables Ltd.
High VoltageMedium VoltageLow VoltageFire ResistantBuilding WireControl and AuxiliaryCable AccessoriesCu Wire & ConductorInstrumentation and Pilot Cables
Product Range
Abstract
Design based on GCC region utility requirements
Present 3 core, 5 types of MV XLPE (11kV) cable designs operating at 90°C
Demonstrate gains and drawbacks of each one .
Type 1-Standard CableCopper tape screen and armour together withstands short circuit of 23.21 kA/1sec.
• Non water tight construction
• Tolerates mechanical stresses
• PVC outer sheath provides fire retardant property
Type 2-Radially and longitudinally water tight cable
• Copper tape and armour together withstands short circuit of 25.14 kA/1sec.• Problematic installation due to high diameter• Radial & longitudinal water tight at each core• Tolerates mechanical stresses• PVC bedding and PE sheathing not recommended
Type 3-Water tight at conductor level with interstitial copper conductor
• Copper tape screen withstands short circuit of 21.84 kA/1sec. • longitudinal water tight only at each core• high cost• Steel tape armour is weak• PE sheath provides addition mechanical protection
Type 4-Lead sheathed Radial and longitudinal water tight cable
• Short circuit of lead is 18.74 kA/1sec., and increases by more thickness.• longitudinal & radial water tight• Relatively low in cost• Mechanically weak• Special installation due to heavy weight
Type 5-Without Individual Screen, Non water tight cable
• Armour short circuit of 18.64 kA/1sec.• No water tight• Lowest in copper content• Mechanically tough • Least in dimension and weight
Comparing – Current Rating
471454 466
495477
561531
550
588572
0
100
200
300
400
500
600
700
0 1 2 3 4 5 6
Am
ps
Design type
In ground
In air
471454 466
495477
561531
550
588572
0
100
200
300
400
500
600
700
0 1 2 3 4 5 6
Am
ps
Design type
In ground
In air
471454 466
495477
561531
550
588572
0
100
200
300
400
500
600
700
0 1 2 3 4 5 6
Am
ps
Design type
In ground
In air
471454 466
495477
561531
550
588572
0
100
200
300
400
500
600
700
0 1 2 3 4 5 6
Am
ps
Design type
In ground
In air
471454 466
495477
561531
550
588572
0
100
200
300
400
500
600
700
0 1 2 3 4 5 6
Am
ps
Design type
In ground
In air
Comparing – Physical Dimensions
82
93
82
7978
15
17
14,6
19,6
14,4
0
5
10
15
20
25
70
75
80
85
90
95
Design 1 Design 2 Design 3 Design 4 Design 5
Physical dimension of cables
Diameter in mm
Weight in MT/km
Conclusion
Characteristics Design 1 Design 2 Design 3 Design 4 Design 5
Standard Armoured, PVC sheathed
Individual core WT PVC/SWA/PE
Separate Earth conductorsPE/STA/PE
Individual core Lead sheath/PE
Armour as Earth return /PVC
Continuous electrical load G G G E G
Short Circuit load E E F G E
Bending properties
(flexing property)
G F G P E
Anti Termite and Rodent,
Reduced water diffusion, higher
abrasion resistance and increased
toughness.
G E E E G
Water Resistant F E G E F
Joint and Accessories Standard Special Special Standard Standard
E – Excellent ;G – Good; F-Fair ; P- Poor
End of presentation
Thank you for listening
OBRIGADO
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