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Product Details...
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PVC
Cables |
PVC (Poly Vinyl Chloride) insulated Power Cables have
proved integral to all distribution networks in low tension, fixed
installation. They are also used as control cables for process and
manufacturing industries, and in mining industries involving fixed
installation.
"GLOSTER" PVC
Cables are suitable for continuous use between 30°C and 70°C and upto 85°C
for Heat Resistant applications.
PVC, as insulation
and sheath compounds, has the following superior features:
- Strong and made for easy handling
- Resistant to water, moisture, oils and chemicals
- PVC black compounds can resist ultraviolet degradation
- Specially formulated PVC is flame retardant and reduces emission of halogens and smoke
We have a modern
compounding plant for making PVC insulation and sheathing compounds,
according to our own formulae and strict quality control. Further, raw
materials meant for blending in the compounding plant are subject to
comprehensive chemical, electrical and mechanical tests before
acceptance.
PVC Cables are
manufactured according to IS:1554 (Part I) up to 1.1 KV grade. All Cables
have the ISI Certification. |
XLPE Cables are
manufactured according to IS:7098 (Part - I), up to and including the
latest amendments. All cables have the ISI Certification.
In India, PVC
has been a dominant insulant for LT Power and Control Cables since 1960.
Cross Linked Polyethylene (XLPE) emerged during 1970 as cable insulant for
LT and subsequently, HT Cables as the most economic solution with high
efficiency and total reliability. Since the last decade LT XLPE Cables
have become very significant among the industrial users on account of
their excellent features.
SOME OF THE SALIENT FEATURES OF LT XLPE CABLES VIS-A-VIS PVC CABLES -
- Low dielectric loss.
- Higher power rating and higher emergency overload rating.
- Superior short circuit rating.
- Much better insulation resistance i.e., 1000 times more than that of PVC
- Higher resistance to moisture i.e., 100 times more than that of PVC.
- Capacity to withstand localized hot spot temperature, very vital to steel plants,
power stations, etc.
- Resistant to chemicals and corrosive gases, etc.
- Exhibits better properties, such as resistance to vibration, impact, ageing and hot
deformation.
- Termination and jointing methods are very easy, simple and non-expensive as compared to
other cables.
- Better resistance to surge currents.
- Much longer life of the cable.
In view of the above, 1.1 KV XLPE Cables are most suited for low
tension power distribution with high efficiency and total reliability and
above all most economical in the long run. |
Cross Linked Polyethylene Cable i.e. XLPE Cable was developed in
late 1970 to overcome the susceptibility of PILC Cables to ingress of
moisture. Hence the advent of XLPE cables marked the beginning of a
gradual but steady replacement of Paper Cables in almost all voltage
applications.
XLPE Cables command an immediate acceptance in view of
excellent thermal and electrical properties, easier handling, jointing
procedure and maintenance.
This brochure provides details on XLPE
cables of 3.3 KV to 33 KV Grade, manufactured as per Indian Standard 7098
(Part II) of 1985 with latest amendments.
The excellent thermal
properties of XLPE Cable permit maximum continuous conductor operating
temperature of 90° C and short circuit temperature of 250° C. Moreover, it
has low dielectric loss, which does not vary much over the entire
operating temperature range. These characteristics, along with the low
dielectric constant, make XLPE Cable particularly suitable for high
voltage applications. Given below are additional
outstandingfeatures.
HIGH CONTINUOUS CURRENT RATING:
Its ability to withstand higher operatingtemperature of 90° C
enables much higher current rating than those of PVC or PILC
cables.
HIGH SHORT CIRCUIT RATING:
Maximum allowable conductor temperature during short circuit of 250° C is
considerably higher than for PVC or PILC Cables resulting in greater short
circuit withstand capacity.
HIGH EMERGENCY LOAD CAPACITY:
XLPE Cables can be operated even at 130° C during emergency, therefore in systems,
where cables are installed in parallel; failure of one of two cables will
not bring down the system capacity for some time.
LOW DIELECTRIC LOSSES:
XLPE Cables have low dielectric loss angle. Moreover, these losses occur continuously in every
charged cable whether it carries load or not. Hence use of XLPE Cable at
higher voltage would result in considerable saving in costs.
LOWER CHARGING CURRENTS:
The charging currents are considerably lower permitting close setting of protection
relays.
EASY LAYING AND INSTALLATION:
Low weight and small bending radii make layingand installation of cable very easy.
The cable requires less supports due to low weight.
HIGH SAFETY:
Cables have High safety against mechanical damage and vibrations.
APPLICATIONS:
- 1 Used extensively in all power generating plants and
industrial plants.
- 2 Used in chemical and fertilizer units where cables are
exposed to chemical corrosion.
- 3 Used in heavy industries where severe load
fluctuations occur.
- 4 Used in systems where there are frequent over
voltages.
- 5 Used at higher ambient temperatures on account of
their higher operating temperatures.
- 6 Used even under most difficult cable route conditions
such as city distribution network.
DESIGN AND
CONSTRUCTION
HT XLPE cables are manufactured and tested in accordance with IS: 7098
(Part-ll) with latest amendments. Its salient constructional features are
as under. |
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Fire Retardant Low
Smoke (FRLS) Cables |
Growing awareness of
fire hazards - a phenomenon causing immense loss by emitting smoke and
poisonous gases - has led to the birth of FRLS cables.
FRLS cables
offer improved performance characteristics in respect of the
following
* Flame Retardance *
Low Smoke Emission * Low Acid Gas Emission.
In order to meet the
above, special pvc compound is used for the outer sheath. The design,
construction, ingredients and testing of FRLS cables is as per IS/1554
(Part I). Over and above these standard tests, FRLS cables and its
components are put to a series of special tests to fulfill the need of
improved performance characteristics.
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Physical
Testing
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Smoke Density
Measurement Test as per ASTM-D 2843
-
Oxygen Index and
Temperature Index Test as per ASTM D 2863
-
Halogen Acid Gas
Test as per IEC 754 - Part (1) 60754
Apart from these
tests, the following tests on finished cables are also carried
out :-
- Tests on electrical
cables as per IEC 332 - (Part-1) 60332
-
Flammability Test -
Chimney Test for Class F3 as per Swedish Standards SS 424 1475
-
Flame Test as per
IEEE - 383, IEC 332 (Part 3) 60332
Applications:
FRLS cables
are ideal for use in high-rise buildings, data processing centers,
hospitals, theatres, hotels, schools, warehouses, industrial complexes,
power stations, underground railways, oil platforms and areas where safety
of personnel and protection of equipment is absolutely
vital. |
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