frost

protection
solutions
Constant wattage heating cables
Self-regulating heating cables
Temperature controllers

for everyone

Heating systems protect pipes, valves, actuators and other

elements vulnerable to harmful influence of low
temperatures, against the coldest winter conditions.
Financial losses incurred due to damaged pipes and valves
may even exceed investment costs of entire heating
systems.

These heating systems are used for:

preventing frozen

water fixtures,

sewage systems,

sprinkler systems,

hydrants,

air conditioning and ventilating

pipe systems.

Systems will fulfill their

protective functions
even in the coldest
of winters

All metal (steel, copper, iron) and plastic pipes

and tubes can be heated.

For pipe and pipeline heating,

the following can be applied:

constant wattage heating cables

ELEKTRA VCD10 and ELEKTRA FreezeTec,
with constant heat output
per metre,

self-regulating heating cables

ELEKTRA SelfTec,
with heat output matching the outside
temperature variations.

1. ELEKTRA VCD10 heating cables

are ready-made units consisting of a 10 W/m
heat output cable, terminated with a 2.5 mlong power supply conductor. When designing
your heating system, account for the available
cable lengths.
ELEKTRA VCD10 cable heating systems require
temperature controllers. They are meant to
be used in heating systems with precise
temperature control.

Constant wattage cables

Single-side supplied ELEKTRA VCD10

heating cables, in ready-made units

ELEKTRA FreezeTec heating cables

with built-in temperature controllers,
in ready-made units

ELEKTRA VCD heating cable

ELEKTRA VCD heating cable structure

Multi-wire heating core

XLPE insulation

PET covered aluminum foil shield

Tinned copper braiding

Heat resistant PVC outher sheath

2. ELEKTRA FreezeTec heating cables

No additional controls are required

are ready-made units of specified lengths,

for the operation of ELEKTRA FreezeTec

consisting of a 12 W/m heat output cable,

heating cables.

terminated with a 1.5 m-long power supply

These cables are especially designed for

conductor with a sealed plug at one end,

the simple heating systems with actuators

and a thermostat at the other end.

or pipes of max. 50 mm diameter.

The thermostat will automatically turn on the

The installation can be performed on

systems operation at +3C and off at +10C.

a DIY basis, an installers assistance

is not required.
hermetically
sealed plug
power supply
cold tail cable

label

thermostat

ELEKTRA FreezeTec heating cable

heating
cable

connecting joint
between the power
supply conductor
and the heating cable

Self-regulating cables

ELEKTRA SelfTecPRO self-regulating

Heat output variations

heating cables are available on spools,

will occur only in those

with lengths to match those of pipelines,

places where the

directly on building sites. These cables

temperature change

require termination and power supply

is noticeable and

connection.

will not influence the heat

ELEKTRA SelfTec self-regulating

output of the remaining part

heating cables are ready-made units of

of the cable that is the reason

specified lengths, terminated with

why the cables are not in danger of overheating

a 1.5 m-long power supply conductor

and they can even touch or cross freely.

with a sealed plug. They are also

alternatively available on spools.

ELEKTRA SelfTecDW self-regulating

heating cables are available on spools

Advantages

and are designed for the applications both

of self-regulating cables

outside as well as inside water pipelines.

Self-regulating cables are made up from

site possible, to match the required

two copper wires positioned in parallel,

length (max. cable lengths shown

interconnected with a core composed

in the table). This option facilitates

of cross-linked polymer with addition

matching the heating cables length

of graphite.

to that of the heated element

The core constitutes a self-regulating

on the design-, as well as installation

heating element whose resistance will alter

stage.

depending on temperature.

and flanges.

increase their heat output

with the decrease of the heated items

Cable crossing possible, which

enables easy positioning on valves

Thanks to this property, the cables will

Trimming directly on a building

Ambient temperature drop will

temperature, and respectively decrease it

automatically increase the cables

with the temperature increase.

heat output.

ELEKTRA SelfTec heating

cable structure

Only ELEKTRA SelfTec cables

can freely cross and touch

Tin-coated multi-wire copper conductor

Self-regulating conductive core

Modified polyolefin insulation

PET covered aluminum foil shield

Tinned copper braiding

UV resistant halogen free

polyolefin outer sheath

ELEKTRA SelfTecPRO 20
ELEKTRA SelfTecPRO 10
ELEKTRA SelfTecDW 10

Output [W/m]

ELEKTRA SelfTec

16

40

20

0
-20

20

40

60
Temperature [oC]

Heating power of the ELEKTRA SelfTec self-regulating

cables in the function of temperature

ELEKTRA SelfTec
heating cable

Type/power output
(+10C)

ELEKTRA SelfTecPRO
heating cable

SelfTecDW
10 W/m

SelfTec
16 W/m

Power supply

SelfTecPRO
10 W/m

SelfTecPRO
20 W/m

230 V ~ 50/60 Hz

External dimension of cable

~ 6 x 9mm

~ 6 x 11mm

Min. installation temperature

-25C

Max. working temperature

65C

Max. exposure temperature

65C

(power-on, 1000 h cumulative)

85C

self-regulating, conductor screen, single-side supply

Type of heating cable

Conductor, tin-coated copper

0,6mm2

Insulation

1mm2

1mm2

modified polyolefin
double-layer,
halogen free polyolefin
+ external LDPE,
certified for drinking water
applications

Outer sheath

UV-resistant, halogen free polyolefin

Min. bending radius

3,5 D

Max. cable length per circuit

details in the table below

SelfTecDW

SelfTec 16

SelfTecPRO 10

SelfTecPRO 20

Circuit-breaker, C-type

Turn-on
temperature

10A

10A

10A

16A

10A

16A

Max. cable length per circuit [m]

-20C

52

79

118

42

58

-15C

55

90

136

49

71

0C

95

66

100

145

55

85

(60 in water)

72

118

154

79

110

55

36

42

45

+10C
0C
in ice water

100

SelfTecDW: self-regulating
heating cable for applications
both outside as well as inside
water pipelines
This installation type enables anti-frost
protection of:

pipelines under operation,

with no necessity of removing
insulation,

underground pipelines.

SelfTec
lead-through

Features
The 10 W/m cable output (at +10C) was
especially selected to account for the water
heat capacity.
ELEKTRA SelfTecDW heating cables have
double layer outer sheath - the first layer made
of halogen-free polyolefin, and the additional
one made of LDPE certified for food contact
applications, allowing applications inside
drinking water pipelines.
The power circuit protected with an RCD

ELEKTRA SelfTec DW
heating cable

will guarantee anti-shock protection.

Heating cables selection

Proper selection of the heating cable adequate for the

The table data has been estimated under

pipe heating purposes, requires estimation of the

the following assumptions:

pipelines heat losses. If detailed calculation wont be

polyurethane foam insulation

made, the table below can be used for general

of the given thickness

estimation.

(from 10 to 40 mm),

Heat losses in the function of pipelines diameters

and thermal insulations thickness

Insulation thickness
= 0.035W/mK

["]
[mm]
10
13
16
19
20
25
30
32
40

30

between the in-pipeline set

temperature and minimum
external temperature.

Pipelines diameter

DT
[C]

5.8
5.0
4.5
4.1
4.1
3.7
3.4
3.3
3.0

15

20

25

DT - 30C: temperature difference

After heat losses will have been determined,

32

40

50

the heating cables selection can commence.

8.6 10.5 12.3 14.9 17.9 21.6

7.2 8.7 10.2 12.2 14.5 17.3
6.4 7.6 8.8 10.5 12.3 14.7
5.7 6.8 7.9 9.3 10.9 12.8
5.6 6.6 7.6 8.9 10.5 12.3
4.9 5.8 6.6 7.7 8.9 10.5
4.5 5.2 5.9 6.9 7.9 9.2
4.4 5.1 5.7 6.6 7.6 8.8
3.9 4.5 5.1 5.8 6.6 7.6

The heating cable should provide the system

with the heat output at least equal or higher
to estimated heat losses. When selecting the
heating cables length, it is necessary to
account for the cable positioning options.

temperature sensor

Heating cables can be positioned along pipelines:

in a single run,

in a double (or multiple) run,

spirally.
45o

heating cable

Heating cables selection method

for simple systems with max. diameter

of 50 mm:
ELEKTRA FreezeTec ready-made units,
ELEKTRA SelfTec ready-made units,
ELEKTRA VCD10 ready-made units,

for extended pipelines:

ELEKTRA VCD10 ready-made units,
ELEKTRA SelfTecPRO self-regulating
heating cables,

for extended pipelines with branches,

After estimating
the heat losses, start
the heating cables
selection

valves and flanges:

ELEKTRA SelfTecPRO self-regulating
heating cables.

ELEKTRA SelfTecPRO self-regulating heating cables

are available on spools. When the required length will
have been matched, these cables require termination
and power supply connection. Connections will need
the cable length margin of total 0.5 m.
ELEKTRA EC-PRO joint set

Power for self-regulating cables can be supplied

in either of the two following ways:

with a power supply conductor

(cold tail) connecting joint must
be positioned on the heated pipeline,
under insulation. For self-regulating
cables termination and cold tail
power supply connection,
ELEKTRA EC-PRO joint set will be
required, by direct connection
to the power supply domestic circuit,
via ELEKTRA KF 5045-PRO junction
box, with ELEKTRA ECM 25-PRO
joint set.

ELEKTRA ECM 25-PRO

joint set

Halogen-free thermoplast
junction box,
protection rating IP 66

Heating systems control

Pipeline heating with constant wattage ELEKTRA VCD10

ELEKTRA FreezeTec heating cables with

cables and self-regulating ELEKTRA SelfTecPRO and

built-in thermostat do not require additional

SelfTecDW cables require installation of temperature

controls.

controllers supporting temperature sensors.

ELEKTRA SelfTec self-regulating cable units
Recommended ELEKTRA temperature controllers for

do not require installation of thermostats,

DIN bus installation: ETV-1991, ETN4-1999, ETI-1544,

but manual system switch off when ambient

ETI-1522, as well as UTR 60-PRO for the wall surface

temperatures exceed 0C.

installation.

Type

ETN4-1999

ETI-1544

ETI-1522

Temperature
control range [C]

from 0 to +40 from -19.5 to +70 from -10 to +50 from -10 to +50

Operation
temperature [C]

from 0 to +50

Max. load [W]

IP protection
rating
Installation
Temperature
sensor

10

ETV-1991

UTR 60-PRO
from 0 to +60

from -20 to +55 from -20 to +50 from -20 to +50 from -20 to +50

3600

3600

2300

2300

3600

20

20

20

20

65

DIN bus

DIN bus

DIN bus

DIN bus

wall surface,
on-board

ETF-144/99

ETF-144/99T

ETF-144/99

ETF-622

F 892 002

ELEKTRA ETV
DIN bus installation. Temperature controller

ELEKTRA ETV-1991

with temperature sensor. Compact dimensions

temperature

(2 modules). LED on for system operation.

controller

ELEKTRA ETN4
DIN bus installation. Temperature controller
supporting two temperature sensors, including
a limiting one. Large backlit display presents

ELEKTRA ETN4-1999

the operating parameters of the controller.

temperature

Adjustable hysteresis allows to define precision

controller

of the temperature measurements.

Equipped with the on/off switch.

ELEKTRA ETI
DIN bus installation. Temperature controller
with temperature sensor. Adjustable hysteresis
allowing to assess in detail temperature

ELEKTRA ETI-1544
temperature
controller

measurement precision. Compact dimensions

(2 modules). LED on for system operation.
In special cases (greasy pipes or temporary
in-pipe temperature exceeding +70C e.g.
while flushing or washing), ELEKTRA ETI-1522
temperature controller is recommended, which
features especially designed sensor with safe
operation temperature range from -40C
to +120C.

ELEKTRA ETI-1522
temperature
controller
(temperature
sensor
with installation

UTR 60-PRO

opening)

Switchboard mounting. Temperature controller

especially designed for ELEKTRA SelfTecPRO
self-regulating cable pipe heating systems.

ELEKTRA

Features temperature sensor for on-pipe

UTR 60-1544

installation, with safe operation temperature

temperature

range for -40C to +120C. Adjustable

controller

hysteresis allowing to assess in detail

temperature measurement precision.
LEDs on for system operation.

11

ELEKTRA VCD
single side powered heating cables 10 W/m
Type

12

Length
[m]

Power output
[W]

VCD 10/70

7.5

70

VCD 10/90

9.0

90

VCD 10/110

11.0

110

VCD 10/135

13.5

135

VCD 10/170

16.5

170

VCD 10/200

20.0

200

VCD 10/235

23.5

235

VCD 10/265

27.0

265

VCD 10/315

32.0

315

VCD 10/370

36.5

370

VCD 10/415

42.0

415

VCD 10/460

46.0

460

VCD 10/570

57.0

570

VCD 10/700

70.0

700

VCD 10/910

92.0

910

VCD 10/1100

111.0

1100

VCD 10/1220

122.0

1220

VCD 10/1450

144.0

1450

VCD 10/1560

156.0

1560

VCD 10/1740

174.0

1740

VCD 10/1920

191.0

1920

VCD 10/2030

203.0

2030

VCD 10/2260

225.0

2260

ELEKTRA FreezeTec
single side powered heating cables
Type

Length
[m]

Power output
[W]

FreezeTec 12/2

24

36

60

84

10

120

15

180

21

252

30

360

42

504

FreezeTec 12/3
FreezeTec 12/5
FreezeTec 12/7
FreezeTec 12/10
FreezeTec 12/15
FreezeTec 12/21
FreezeTec 12/30
FreezeTec 12/42

ELEKTRA SelfTec
self-regulating heating cables
Type

Length
[m]

Power output
[W]

SelfTec 16/1

16

32

48

80

112

SelfTec 16/10

10

160

SelfTec 16/15

15

240

SelfTec 16/20

20

320

up to 72 m

at individual order

SelfTec 16/2
SelfTec 16/3
SelfTec 16/5
SelfTec 16/7

SelfTec 16/X

Type

Info

SelfTecPRO 10

self-regulating heating cable

for advanced applications,
10 W/m (+10C)

SelfTecPRO 20

self-regulating heating cable

for advanced applications,
20 W/m (+10C)

SelfTecDW

self-regulating heating cable

for drinking water applications,
10 W/m (+10C)

13

Product
selection guide

Heating Cables

Constant wattage

Application

Protection
of pipelines
against
freezing

Systems

Hydrant,
sprinkling,
cold water,
rain drain,
sanitary,
sewage

Cable
output
(Q)

According
to the
formula
result,
or the table
reading

Pipe
material

Self-regulating

Basic
applications

Advanced
applications

ETI-1544, ETN4-1999,
ETV-1991

ETI-1522
UTR 60-PRO

Cable
Pipe
positioning diameter
[mm]

Outside
the pipe

50

Inside
the pipe

50

Outside
the pipe

50

Inside
the pipe

50

Steel

Plastic

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