Electra EMD 100 Manual de usuario descargar pdf (Pagina 4)

Self-regulating cables

®

• ELEKTRA SelfTec PRO self-regulating

heating cables are available on spools,

with lengths to match those of pipelines,

directly on building sites. These cables

require termination and power supply

connection.

®

• ELEKTRA SelfTec self-regulating

heating cables are ready-made units of

specified lengths, terminated with

a 1.5 m-long power supply conductor

with a sealed plug. They are also

alternatively available on spools.

®

• ELEKTRA SelfTec DW self-regulating

heating cables are available on spools

and are designed for the applications both

outside as well as inside water pipelines.

Self-regulating cables are made up from

two copper wires positioned in parallel,

interconnected with a core composed

of cross-linked polymer with addition

of graphite.

The core constitutes a self-regulating

heating element whose resistance will alter

depending on temperature.

Thanks to this property, the cables will

increase their heat output

with the decrease of the heated item’s

temperature, and – respectively – decrease it

with the temperature increase.

Advantages

of self-regulating cables

• Trimming directly on a building

site possible, to match the required

length (max. cable lengths shown

in the table). This option facilitates

matching the heating cable’s length

to that of the heated element

on the design-, as well as installation

stage.

• Cable crossing possible, which

enables easy positioning on valves

and flanges.

• Ambient temperature drop will

automatically increase the cable’s

heat output.

Heat output variations

will occur only in those

places where the

temperature change

is noticeable and

will not influence the heat

output of the remaining part

of the cable – that is the reason

why the cables are not in danger of overheating

and they can even touch or cross freely.

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