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Thermoplastic
Power Cable (i.e. PVC Power Cable)
ever since its introduction in low
tension distribution network in
mid - sixties failed to satisfy
utilities and industrial users because
of its may inherent limitations
such as low power rating, poor emergency
overload capacity, poor resistance
to surge currents, thermoplastic
nature , comparatively poor insulation
resistance, shorter life with susceptibility
to thermal degradatiuon, and though
claimed to be moisture resistant
absorbed considerable amount of
moisture on long time exposure to
lower the dielectric properties
alarmingly. Utilities voidced their
grievances in many forums agaisnt
thermoplastivc cables which they
were forced to use because of ban
imposed by the Government on use
of PILC cable in distribution network
due to high import content of this
cable.
M/s
SUYOG ELECTRICALS LTD.,
decided to introduce XLPE Cable
for Medium and Low voltage distribution
network to provide utilities and
industrial users a cable which combines
the advantages of PILC and PVC Cables
totally eliminating their demerits.
Total installed cost of this cable
is also much lower than that of
PILC or PVC Power Cable. This cable
is totally indigenous as XLPE' compound
is now being manufacture by SUYOG
ELECTRICALS LTD. in their
newly installed modern microprocessor
controlled compounding plant.
In
fact 1.1 KV XLPE Cable is the most
economic solution for low tension
power distribution with high efficiency
and total reliability . Utilities
and industrial users will find in
this cable a realisation of their
ling elusive dream of an ideal cablke
for low tension power distribution
system.
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ADVANTAGES |
Advantages
of XLPE cable as compared to thermoplastic
cable are listed below:
- Higher
Power rating.
- Higher
emergency overload rating
- Higher
short circuit rating
- Higher
insulation resistance (1000 times
more than that of PVC)
- Higher
resistance to moisture (100 times
more than that of PVC)
- Capacity
to withstand localised hot spot
temperature (very important for
industrial wiring in steel plant,
power stations etc.)
- Resistance
to chemicals and corrosive gases
etc. - hence suitable for installation
in polluted atmosphere.
- Resistant
to vibratio, impact, etc.- no
hazard of hot deforamtion.
- Quick
method of jointing and termination
with simple, non-expensive accessories.
- Better
resistance to surge currents.
- Longer
cable life.
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| SPECIFICATIONS |
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These
cables are manufactured and tested
as per national / international
standards and also as per specific
requirement of customer. Dimension
of cables conforming to IS:7098/(Part-1)/1988
are given in table 4 to 12.
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| CONSTRUCTION
DETAILS |
| Conductor |
: |
Copper
or Aluminium conductor conforming
to IS:8130/1984 - solid circular,
stranded circular, compacted
circular, stranded shaped. |
| Insulation |
: |
Crosslinked
polyethylene (XLPE) |
| Inner
sheath |
: |
Unvulcanised
rubber or Thermo-Plastic Material
compatible with thermal rating
of insulation. |
| Armour |
: |
Galvanized
steel wires / Flat strips |
| Outer
sheath |
: |
PVC |
| Note |
: |
For
Cable with improved Fire performance
the sheath shall be specially
formulated to meet the requirement
of Flame Retardant (FR) or Flame
Retardance with reduced halogen
evolution and smoke categories
(FRLS) |
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| CURRENT
RATINGS |
| Comparative
data for current ratings and voltage
drop/amp/m for 1.1 KV XLPE and PVC
Power Cables are given in table -
13 under standard conditions. From
this it will be observed that for
equivalent power rating one size lower
1.1 KV XLPE cable may be used as substitute
for PVC cable provided slightly higher
voltage drop can be tolerated. Current
rating, short circuit rating and rating
factors for 1.1 kv XLPE Cable are
given in Table 14 to 22 |
| JOINTING
AND TERMINATION |
No
special skill is required for jointing
and termination of 1.1 KV XLPE cable.
For jointing and termination any of
the following standard methods may
be employed:-
- Cast
resin jointing and termination
with cast polyurethane compound
-
Heat shrinkable joints and termination.
Method (I) and (II) are the preferred
techniques. Accessories needed
for jointing and Termination are
simple and readily available from
standard manufacturers.
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| EMERGENCY
OVERLOADING |
| Cables
can be overloaded upto max conductor
temperature FOR 130 degree C for a
duration of max 100 hours in any twelve
consecutive months, and max. 500 hours
during the life time of cable. |
| APPLICATIONS |
| Besides
being ideal for general purpose distribution
1.1 KV XLPE cable will be specially
advantageous for use in steel plants,
power station wiring, chemical plant
wiring, under water wiring, wiring
for mines etc. |
| NOTE
OF CAUTION |
| Do
not use PVC sheathed cables where
it is likely to come in contact with
sulphuric acid , highly chlorinated
hudro carbon cresylic acids, pyridine,
ketones & caprolactum. |
| TECHNICAL
ADVICE |
| We
welcome enquiries on cable engineering
problems and get them solved for you
through our design and development
staff and assist you in providing
even design for cables to suit your
particular requirement. |
| Click
Below for Detailed Technical Specification
Tables |
Any
other construction on request.
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