12/20KV Medium Voltage Three Cores Power Cable (Armoured)
The three core cables are designed for distribution of electrical
power with nominal voltage Uo/U ranging from 1.8/3KV to 26/35KV and
frequency 50Hz. They are suitable for installation mostly in power
supply stations, indoors and in cable ducts, outdoors, underground
and in water as well as for installation on cable trays for
industries, switchboards and power stations.
IEC 60502 Part 2(3.6/6KV to 18/30KV)
Either aluminium or copper conductors are used. Conductors up to
630mm² will be circular, compacted & stranded and shall comply
with IEC 60228 class 2. 630mm² conductor will be circular stranded
type on which a layer of semi-conducting tape will be applied.
This will be an extruded layer of semi-conducting crosslinkable
compound applied under simultaneous triple extrusion process over
the conductor along with the insulation and the insulation screen.
The triple extrusion is a single high precision operation that
eliminates the possibility of any contamination between the layers
which could create irregularities in the electrical field. By
careful material selection and special attention to process
parameters, we produce the insulation screen layers with the
required degree of stripping force as stipulated by the applicable
national or international standard.
This will be an extruded layer of XLPE applied over conductor
screen under triple extrusion process along with conductor screen
and insulation screen.
This will be a layer of semi-conducting crosslinkable compound
which will be applied by triple extrusion process over the
It will consist of a layer of copper tape applied helically with
overlap over insulation screen. Other combinations of metallic
screens as per customer ’s requirement can also be provided on
In case of three core cables, the three cores are laid up with
non-hygroscopic fillers like polypropylene(PP) fillers at
interstices and a binder tape is applied with an overlap. These
binder tapes can be of PVC or foamed Polyethylene.
Inner Sheath (Bedding) for Armoured Cables
Extruded layer of PVC or PE is applied over the laid up cores for
armoured cables. PVC is normally of grade ST2 and PE of grade ST7
as per IEC 60502 Part 2.
In case of armoured cables, the armour is applied helically over
inner sheath. For single core cables, it is of aluminium wires and
for multicore cables, the armour can be of one among the following
a) Galvanized steel wire.
b) Galvanized steel tape.
An extruded layer is applied over the armour in case of armoured
cables and over laid up cores in case of unarmoured cables. Outer
sheath material can be either PVC, PE, HDPE or MDPE. our
medium voltage cables are normally supplied with red PVC over
sheaths complying with BS 6622 or IEC 60502. Other colors may be
provided to suit a range of installation considerations such as the
effect of UV radiations and differing soil compositions.
Anti-termite formulations can also be supplied in addition to
graphite-coated over sheaths where on-site testing of the sheath is
Fire Performance on Cable Sheaths
Cables can also be supplied with special flame retardant PVC over
sheaths to comply with the IEC 60332 standard. We can also supply
cables with Low Smoke Halogen Free (LSZH) sheaths according to BS
7211 and BS 6724 standards or other equivalent international
12/20KV Medium Voltage Three Cores Power Cable (Amoured)
|Normal cross sectional area|
|Appro conductor dia|
|Nom insulation thickness|
|Copper tape thickness|
|Copper wire screen area|
|Appro. Insulation dia|
|Nom armor thickness|
|Nom sheath thickness|
|Appro overall diameter|
| || || || || || || || || ||CU||AL|
Why Choose Zhenglan Cable:
- OEM/ODM services provided;
- Products comply with GB, IEC, BS, ASTM, DIN, VDE and JIS standards;
Customer standard requirments Accepted;
- Certified to ISO 9001:2015, ISO 14001:2015 and OHSAS 18001:2007;
- Registered capital of $30 million and factory covers an area of
- Advanced test equipment and procedures, 100% inspection before
- Enough stocks and the higest efficient shipping time guarranteed;
- Professional pre-sales and after-sales services provided.