CABLE PENETRATION IN KGP SUBSTATIONS

CABLE PENETRATION CABLE PENETRATION THROUGH SUBSTATION THROUGH SUBSTATION

WALLS AT KGPWALLS AT KGPPresented by:Presented by:

Abdullah Al-DushaishiAbdullah Al-DushaishiElectrical Quality EngineerElectrical Quality Engineer

KPIS/KGPIUKPIS/KGPIU

July 2007July 2007

OUTLINEOUTLINE Cables in Cable TraysCables in Cable Trays

Cables from Cable Trays to Multi-Cables from Cable Trays to Multi-Cable Transit (MCT)Cable Transit (MCT)

Cables Penetrating Substation WallsCables Penetrating Substation Walls

Cables in Cable TraysCables in Cable Trays Does the number of cables or total cross-sectional area permitted in a single cable tray meet the requirements of NEC?

Are supports sufficient to meet the load requirement of the cables?

Is consideration given to the loads associated with future cable additions?

PID Recommendations I

Cables in Cable TraysCables in Cable TraysQ: Does the number of cables or total cross-sectional area permitted in a single cable tray meet the requirements of NEC?Ref.: NEC ARTICLE 392 Cable Trays392 . 9 (A) (2)

Ref.: NEC ARTICLE 392 Cable Trays392 . 9 (A) (2)

Cables in Cable TraysCables in Cable TraysQ: Are supports sufficient to meet the load requirement of the cables?Q: Is consideration given to the loads associated with future cable additions?Ref.: NEMA VE 2; Para. 4.2.1

Cables in Cable TraysCables in Cable TraysCable Tray Fill Area Calculation Case study

Cables in Cable TraysCables in Cable TraysCable Tray Support Design Calculation 81.67 kg/m

Cables in Cable TraysCables in Cable Trays

Cable Cable Tray #Tray # Cable SizeCable Size No. of No. of

CablesCablesArea of Area of Cables Cables (mm2)(mm2)

Total Area Total Area (mm2)(mm2)

Cable Cable TrayTrayFill % Fill %

CablesCablesWeightWeightkg/mkg/m

Cable Cable TrayTrayLoad %Load %

233-233-415415

3C-35+1C-3C-35+1C-1616 6262 43825.3243825.32

74259.5774259.57 412.55%412.55% 239.183239.18366 292.87%292.87%

19C-2.5 19C-2.5 6262 30434.2530434.25

233-32233-32

3C-35+1C-3C-35+1C-1616 3232 22619.5222619.52

38327.5238327.52 212.93%212.93% 123.449123.44966 151.16%151.16%

19C-2.5 19C-2.5 3232 15708.0015708.00

PID Recommendations IPID Recommendations I Contractor shall provide cable tray fill percentage schedule for PID review

Contractor shall verify cable tray load calculation

Contractor shall prove considering future needs

Cables from Cable Trays Cables from Cable Trays to Multi-Cable Transit to Multi-Cable Transit (MCT)(MCT) Is sufficient protection provided to cables?

Is stress prevented where cables enter MCT?

Are cables supported in intervals not exceeding NEC limits?

PID Recommendations II

Cables from Cable Trays Cables from Cable Trays to Multi-Cable Transit to Multi-Cable Transit (MCT)(MCT)Q: Is sufficient protection provided to cables?

Cables from Cable Trays Cables from Cable Trays to Multi-Cable Transit to Multi-Cable Transit (MCT)(MCT)

Cables from Cable Trays Cables from Cable Trays to Multi-Cable Transit to Multi-Cable Transit (MCT)(MCT)Q: Is stress prevented where cables enter MCT?Ref.: NEC ARTICLE 392 Cable Trays392 . 6 C

Cables from Cable Trays Cables from Cable Trays to Multi-Cable Transit to Multi-Cable Transit (MCT)(MCT)Q: Are cables supported at intervals not exceeding NEC limits?Ref.: NEC ARTICLE 320 Armored Cable: Type AC320 . 30 C

PID Recommendations PID Recommendations IIII Contractor shall make sample installation for protection the cable from the tray sharp edge. This sample shall be accepted by PID and the PROPONANT.

Contractor shall prevent stress for the cable everywhere

Contractor shall verify that cables supported in intervals not exceeding NEC limits

Contractor shall avoid supporting the cable by the structure

Contractor shall use T-fittings to solve all problems wherever he can

Cables Penetrating Cables Penetrating Substation WallsSubstation WallsAre the cables entering the right MCT as mentioned in cable schedule?

Is the CONTRACTOR able to use MCT professionally in this stage?

PID Recommendations III

Cables Penetrating Cables Penetrating Substation WallsSubstation WallsQ: Are the cables entering the right MCT as mentioned in cable schedule?

Cables Penetrating Cables Penetrating Substation WallsSubstation WallsQ: Is the CONTRACTOR able to use MCT system professionally at this stage?!

Cables Penetrating Cables Penetrating Substation WallsSubstation WallsHawke Transit System Catalogue

PID Recommendations PID Recommendations IIIIII Contractor shall make sample installation of MCT

Thank You