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SELFTRACE CABLES |
Thermo Selftrace Cables are self regulating
heating cables which can be used for freeze
protection of water pipelines, roof & gutter
heating and process temperature maintenance of
pipelines, vessels, tanks, equipments etc., in
domestic, commercial and industrial applications
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Thermopads offers
Selftrace STS
and
Selftrace STW.
Selftrace - STS
is
ideally
suited for low temperature
applications such as freeze
protection of potable water
pipelines and can be used for
installation on the outside
surface of the pipelines and
inside pipelines.
Selftrace - STW
is
ideally suited for low
temperature applications such as
roof and gutter heating and can
be used for installation on the
roofs and in gutters for snow /
ice melting
and process temperature
maintenance of pipelines,
vessels, tanks, equipments etc.,
in domestic, commercial and
industrial applications.
Operating Principle
:
Selftrace
derives its
self-regulating characteristic from
the inherent properties of the semi
conductive core material. |
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As the core material temperature increases, the number of
conductive paths in the core
material decreases, thus
decreasing the heat output. As the
temperature decreases, the number
of conductive paths increases,
causing the heat output to
increase. This occurs at every
point along the cable’s length,
adjusting the power output to the
varying conditions. As the cable
self-regulates its heat output, it
limits the maximum sheath
temperature, thus making it
burn-out proof. |
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Construction:
Thermo
Selftrace is a self-regulating
parallel circuit heating cable
consisting of a semi-conductive
heating core extruded over
stranded coated copper bus
wires. Heating core is covered
with TPE jacket to provide
electrical insulation,
mechanical strength and moisture
resistance. A tinned copper
braid is provided over the
electrical insulation to give a
continuous ground path. An outer
jacket of TPE / Fluoropolymer is
provided for use in corrosive
areas.
1) Bus wire conductor
2) Semi conductive heating core
3) Primary insulation jacket
4) Metal Braid
5) Outer jacket
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TECHNICAL SPECIFICATIONS
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Bus wire Conductor |
Coated Copper |
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Heating Element |
Semi Conductive core |
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Primary Insulation jacket |
Thermo Plastic
Elastomer (TPE) |
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Metal braid |
Tinned Copper |
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Outer Jacket |
Thermo Plastic Elastomer (TPE)
or Fluoropolymer |
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Minimum Temperature |
-30°C
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Maintain Temperature |
65°C
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Max. Exposure Temperature |
65°C
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Bending radius |
35mm (inner side)
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Linear power output |
10, 15, 17, 25, 31 W/m when
measured at 10°C
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Supply Voltage |
230V A.C |
Power
Output Curves :
Power
Output Curves For Selftrace - STW
:
Product
Range , Circuit Breaker
Selection and maximum Lengths :
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Catalog Number |
Output at 10Deg C |
Maximum Circuit Length |
Circuit Breaker Size |
Maximum Maintenance
Temperature |
Maximum Exposure
Temperature |
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STS - 10* |
10 W/m |
100/60* |
10A |
65°C
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65°C
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STS - 15 |
15 W/m |
72 |
10A |
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STW – 17 |
17 W/m |
154 |
16A |
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STW – 25 |
25 W/m |
124 |
20A |
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STW – 31
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31 W/m |
110 |
25A |
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* STS-10 is offered for
inside pipe application with flouropolymer over jacket.
Maximum length of heat
tracer for inside pipe
application is 60M.
Note:
1) Circuit breakers are
sized based on start-up
temperatures at 10°C.
2) Earth leakage circuit
breaker (ELCB) is
recommended for each heating
circuit. Sensitivity of the
ELCB should not exceed 30 mA. |
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Accessories:
We offer full range of
accessories required for
power connection, end
connection, splice
connection and temperature
controllers. |
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For
more details and business
queries please
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