Page 140 - 3rd issue

High & Extra High Voltage Power Cables

Operating Voltage from 38 / 66 KV up to Designation Code for High & Extra High
127 / 220 KV Cable Construction Voltage Power CablesYou can order
our product by giving the following
1. Conductor informations

Conductor consists of stranded Aluminum or soft 1- cable codes as per the catalogue
drawn copper that produced by two technologies: 2- if your requirements is out of our
catalogue product range, you can use the
a. Circular Compacted following map to identify the code

Multi layers of stranded wires are assembled Conductor Material Outer
together to form a circular compacted conductor Sheathing Type
G Copper + Swelling Powder + S.C Tape
b. Segmental Conductor (Applied from E Aluminum + Swelling Powder + S.C Tape P PVC
C.S.A = 1000 mm2 and above) M Copper Millikan + Swelling Powder + S.C Tape F PVC / FR
N Aluminum Millikan + Swelling Powder + S.C Tape S LSHF
Five segments of compacted conductor in sector H HDPE
shape of 72o are assembled together with C.S.A mm2 L LDPE
separation of non-metallic tapes to reduce the E LLDPE
skin effect which reduce the Rac 25 300

2. Conductor Screen (Bonded to the 26 400
inner layer of the insulation layer)
27 500
An extruded layer of cross linkable semi
conducting applied over the conductor to reduce 28 630
and control the electric stress beneath the
(XLPE) insulation layer 29 800

30 1000

3. Cross Linked Polyethylene 31 1200 M MDPE
(XLPE) Insulation 32 1600
33 2000 Armoring
An extruded layer of XLPE of high grad is extruded & Shielding
in dry cooling & curing continuous vulcanizing line. Insulation Type
X XLPE B Lead Sheathed
4. Insulation Screen (Bonded to the P Copper Screen + Aluminum foil Shield
outer layer of the insulation layer) Voltage Grade R Copper Screen + Lead
S Copper Screen + Galavanized Steel Wires
An extruded layer of cross linkable semi 9 26/45 (52) KV A Copper Screen + Aluminum Wires
conducting is applied over the insulation layer A 38/66 (72.5) KV C Copper Screen + Aluminum Tapes
to insure that the electric stress is homogenous B 64/115 (123) KV
around the insulated core. C 76/132 (145) KV
Conductor screen, insulation and insulation D 87/150 (170) KV
screen are applied in one process (triple E 127/220 (245) KV
extrusion process) to insure that all extruded
layers are bonded together. No. of Cores

5. Metallic Screen / Sheath 01 1

One or multi layers of metallic screen / sheath
such as copper wires, lead, aluminum, etc.shall
be applied as a return path of earth fault current.
Metallic sheaths may be used for water blocking
protection and mechanical protection.

6. Water blocking:

Upon request, swelling powder should be applied
between the conductor strands then Followed
by swelling semi conductive water blocking tape
over the complete conductor

7. Overall Jacket (Outer Sheath)

An extruded layer of PVC, PE (HDPE, LDPE,
and MDPE) shall be applied over the metallic
layers for protection against chemical reaction &
mechanical protection.Extruded semi conductive
layer or graphite coating shall be applied over
the outer sheath for D.C testing purpose