cable data

VärmeKabelTeknik Technical data – Heating cables

From

Technical data – Heating cables VärmeKabelTeknik 2

SERIES RESISTIVE HEATING CABLES The first heating cable that was produced was of a series resistive type. Today there are several types of series resistive heat‐ing cables available. These are manufactured in qualities from PVC to mineral insulated high‐temperature cable with rustless sheath. The biggest advantage with these is the possibility to obtain long element lengths, from only one point of connection.

In contrary to parallel resistive and self‐limiting heating cables which maximum length are limited by the voltage drop in the conductors, this is used as a heat emitting part in a series resistive cable. The heating conductor is manufactured of an alloy that gives required resistance per meter. By combining a required length with the available cable resistance's and supply voltages can advantages be obtained such as varying outputs, lengths from a couple of meter to lengths on 800‐1000m from one point of supply.

It is a disadvantage that the cable normally must be finished on the factory, which means you have to know the pipe lengths in advance to be able to pre order required lengths. (At long high‐temperature lengths where the heating conductor contains copper (CC‐cables) shall consideration be taken to the temperature coefficient of the heating conductor which influence the output of the length negatively).

For installations within the EX‐surface a number of supplementary safety devices is required, and exemption from the touched authorities.

Index Series resistive cables

Cable Page

TCPR with return-wire......................................... 3,4 TCPRH, with return-wire ..................................... 5,6 TCT, without return-wire ..................................... 7,8 TCTR, with return-wire ...................................... 9,10 TSF, without return-wire ...................................... 11 TSFR, with return-wire ......................................... 12 HCHH, mineral insulated ..................................... 13 VELOX SIP/PVC .................................................. 14 VELOX SIP/PFA .................................................. 15


3

Velox TCPR ‐ Type of cable: Series resistive, with return‐wire

Range of application:

Frost protection: ... Temperature maintenance of piping and tanks. Interior and exterior in‐stallation in pipings.

Floor heating: ........ Concrete and joist frame. Surface heating: .... To keep footways and drives non‐

slip. Roof applications: .... Frost protection of down gutters

and drain pipes and melting of roof surfaces.

Technical data:

Electric field strength not measurable cable ..... < 3 V/m

Magnetic field strength not measurable cable ..... < 0.06 micro Tessla

Basic type ....................................... 90 CM acc. to IEC800

Tested and approved by ...................... SEMKO (Sweden)

................................................................... SETI (Finland)

............................................................. NEMKO (Norway)

Meets requirements from ...................... VDE (Germany)

..................................................................... BS (England)

.......................................................... DEMKO (Denmark)

Rated voltage ......................................................... 440 V

Sheath temperature. .............................. (Tm) max +90oC

Process temperature. ................................................. (Tp)

‐ Cable off............................................. (Tpoff) max +90oC

Installation temperature.................................. min ‐10oC

Bending radius ............................................... min 25 mm

Diameter ..................................................... 5.5 ± 0.5 mm

Weight ........................................................ 92 kg/1000m

Table 1: Resistance values

Type of cable (Ω/m)

Temperature Coefficience

Part.no

12.00 0.04 18812R8.00 0.15 18800R4.00 0.40 18400R2.90 0.40 18290R1.90 0.40 18190R1.30 0.14 18130R1.00 0.14 18100R0.82 0.14 18082R0.65 0.14 18065R0.45 0.25 18045R0.36 0.25 18036R0.25 0.40 18025R0.18 0.70 18018R

Construction

Conductor with Teflon insu‐lation

Return‐Wire Earth wire

Metallic scre‐en

Sheath inPVC


Velox TCPR ‐ Type of cable: Series resistive, with return‐wire

Sheath temperature

The sheath temperature (Tm) of the cable will vary de‐pending on the process (ambient) temperature (Tp), load (Q) and way of installation.

The sheath temperature is calculated as follows:

Tm = Q __ +Tp

Ua

Tm = Sheath temperature in oC

Tp = Process temperature in oC

Q = Load in W/m

Ua = Heat transfer coeff.

Example:

Velox TCPR mounted without dissipation of heat at an ambient temperature of 25oC, loaded with 20 W/m will have a sheath temperature of 65oC.

Installation in sand and concrete

Sand: max load 20 W/m cable.

Concrete: max load 25 W/m cable.

Sheath temperature: Diagram 1

Cable installed free in air or against heat conducting material (Ua = 0.45)

Read the diagram from right to left (see example (yellow line)

Dissipation of heat

The heat transfer coefficient (Ua) can be improved con‐siderably (3 to 10 times) by arranging some dissipation of heat, for instance by proating the cable with alumin‐ium tape.

For this kind of installation please consult Vär‐meKabelTeknik for assistance with the design and in‐stallation.


5

Velox TCPRH ‐ Type of cable: Series resistive, with return‐wire + extra outer sheath


Surface heating: ....... Non‐slippery walk‐ and drive ways.

Technical data:

Electric field strength not measurable cable ..... < 3 V/m

Magnetic field strength not measurable cable < 0.06 micro Tessla

Basic type ....................................... 90 CM acc. to IEC800


................................................................. SETI (Finland)

............................................................. NEMKO (Norway)

Meets requirements from ...................... VDE (Germany)

..................................................................... BS (England)

.......................................................... DEMKO (Denmark)

Rated voltage ......................................................... 440 V

Sheath temperature. .............................. (Tm) max +90oC

Dimensioning temp. ....................................... max +90oC



Diameter ..................................................... 6.5 ± 0.5 mm

Weight ...................................................... 100 kg/1000m



Temp. koeff.

Part.no

12.00 0.04 18812RH*

8.00 0.15 18800RH*

5.35 0.15 18535RH*

4.00 0.40 18400RH*

2.90 0.40 18290RH*

1.90 0.40 18190RH*

1.30 0.14 18130RH*

1.00 0.14 18100RH*

0.82 0.14 18082RH*

0.65 0.14 18065RH*

0.45 0.25 18045RH*

0.36 0.25 18036RH

0.25 0.40 18025RH

0.18 0.70 18018RH * No stock‐item

Construction

Conductor with Teflon insulation

Earth wire Return‐wire

Metallic screen

Sheath in PVC

Sheath in PVC + Halar (140°C)


Velox TCPRH ‐ Type of cable: Series resistive, with return‐wire + extra outer sheath

Sheath temperature



Tm = Q __ +Tp

Ua



Q = Load in W/m


Example:

Velox TCP/R mounted without dissipation of heat with an ambient temperature of 25oC, loaded with 20 W/m will have a sheath temperature of 65oC.

Installation asphalt

Asphalt: max load 30 W/m cable.

Sheath temperature: Diagram 1 Cable installed free in air or against heat conducting material (Ua = 0.45)

Read the diagram from right to left (see example (yellow line)


7

Velox TCT ‐ Type of cable: Series resistive, without return‐wire


Temperature maintenance and heating of piping, tanks, vents etc in applications with high temperatures, large power requirements and aggressive environmental.

TCT can be installed at plants which are steam purified.

TCT has a sheath of corrosions toughened material (tef‐lon) and manages aggressive environmentals.

Technical data:

Basic type ..................................... NC acc. to SEN 242421


................................................................. SETI (Finland)

................................................................ VDE (Germany)

Rated voltage ......................................................... 440 V

Resistance values ............................ acc. to Table 1 and 2

Process temperature. .................. (Tp) depending on load

‐ Cable off........................................... (Tpoff) max +220oC



Diameter .............................................................. 4.1 mm

Weight ........................................................ 35 kg/1000m



Part.no

12,00 18812T

8.00 18800T

4.00 18400T

2,90 18290T

1,90 18190T

1.30 18130T

1.00 18100T

0.81 18082T

0.65 18065T

0.45 18045T

0.36 18036T

0.25 18025T

0.18 18018T

0.01 Cold-lead-in cable 1,5 18001T

Konstruktion

Resistance wire Cu, CuNi

Armourring – Braided Cu – 16 x 3 x 0.21mm

Sheath in Teflon FEP

Conductor insulation Teflon FEP


Velox TCT ‐ Type of cable: Series resistive, without return‐wire

Sheath temperature



Q Tm = ____ +Tp

Ua



Q = Load in W/m


Example:

Velox TCT mounted without dissipation of heat at an ambient temperature of 100oC, output 30 W/m will have a sheath temperature of 146oC.

Dissipation of heat

The heat transfer coefficient (Ua) can be improved con‐siderably (3 to 10 times) by arranging some dissipation of heat, for instance by proating the cable with alumi‐nium tape. This will enable you to use the heating cable also at high process temperatures up to 200°C.

For this kind of installation please consult VärmeKabel‐Teknik for assis‐tance with the design and installation.



SHEATH TEMPERATURE TCT

0

50

100

150

200

250

300

350

400

0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210

Process temperature °C

Shea

th te

mpe

ratu

re °C

TCT 10WTCT 20WTCT 30WTCT 10W Med alu.tapeTCT 20W Med alu.tapeTCT 30W Med alu.tape

max temperature 220°C


9

Velox TCTR ‐ Type of cable: Series resistive, with return‐wire


Temperature maintenance and heating up piping, tanks etc in plants with high temperatures and high power requirements.

TCT can be installed at plants which are steam purified.

TCT has a sheath of corrosion toughened material (tef‐lon) and manages aggressive environmentals.

Technical data:

Basic type ..................................... NC acc. to SEN 242421


................................................................. SETI (Finland)

................................................................ VDE (Germany)

Rated voltage ......................................................... 440 V

Resistance values ............................ acc. to Table 1 and 2

Process temperature. ................................................. (Tp)‐ Cable on ........................ (Tpon) see diagram on page 2‐ Cable off........................................... (Tpoff) max +220oC



Diameter ................................................................. 5 mm

Weight ........................................................ 68 kg/1000m


Type of ca-ble

(W/m)

Part.no

12.00 18812TR 8.00 18800TR 5.35 18535TR 4.00 18400TR 2.90 18290TR 1.30 18130TR 1.00 18100TR 0.82 18082TR 0.65 18065TR 0.45 18045TR 0.36 18036TR 0.25 18025TR 0.18 18018TR 0.10* 18010TR 0.05* 18005TR 0.03* 18003TR 0.01* 18001TR

* On special order (Del.time 3‐4 weeks)

Construction

Resistance‐wire Cu

Conductor insulation Teflon FEP

Armouring layer Teflon FEP

Armouring – Braided Cu – 16x3x0.21mm




Velox TCTR ‐ Type of cable: Series resistive, with return‐wire

Sheath temperature



Q Tm = ____ +Tp

Ua



Q = Load in W/m


Ua Installed without dDissipation of heat = 0,32 Ua With fitted Alu‐foil = 0.65 Ua With fitted Alu‐tape = 0.8

Example:

Velox TCTR mounted without dissipation of heat at an ambient temperature of 100oC, output 30 W/m will have a sheath temperature of 192oC.

Dissipation of heat

The heat transfer coefficient (Ua) can be improved con‐siderably (3 to 10 times) by arranging some dissipation of heat, for instance by proating the cable with alumi‐nium tape. This will enable you to use the heating cable also where high process temperatures are involved.

For this kind of installation please consult VärmeKabel‐Teknik for assis‐tance with the design and installation.


TCTR cable installed with fitted aluminium tape as dissipation of heat (Ua = 08)

SHEATH TEMPERATURE TCTR

0

50

100

150

200

250

300

350

0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210

Process temperature °C

Shea

th te

mpe

ratu

re °C

TCTR 10WTCTR 20WTCTR 30WTCTR 10W Med alu.tapeTCTR 20W Med alu.tapeTCTR 30W Med alu.tape

Max temperature 220°C


11

Velox TSF ‐ Type of cable: Special cable for hardening of concrete Series resistive, without return‐wire


Hardening of concrete/ Drying up concrete.

Technical data:

Basic type ..................................... BN acc. to SEN 242421


Rated voltage ........................................................... 440V

Heating cable for hardening of concrete is delivered in lengths of 90m for embedment in connection with con‐creting.

Part.no Denomination

89 871 13 TSF 95‐018 ‐ 3000W/230V

89 871 15 TSF‐Distributor, without thermostat

89 871 16 TSF‐Distributor, with thermostat

Construction

Resistance‐wire 0.18 Ω – Cu, CuNi

Conductor insulation PVC


Sheath in PVC Sheath in PVC

Aluminum/Foil/ Mylar


Velox TSFR ‐ Type of cable: Special cable for hardening of concrete Series resistive, with return‐wire


Hardening/drying‐up constructions of concrete and frost protection of ground plates.

Technical data:

Basic type .................................... BN acc. to SEN 242421


Rated voltage .......................................................... 440V

Are supplied as loops of 45/90m for hardening of con‐crete/drying‐up in connection with concreting.


89 871 11R TSF‐R 45‐0.82 ‐1430W/230V

89 871 13R TSF‐R 95‐0.18 ‐ 3000W/230V

89 871 15 TSF‐Distributor without thermos‐tat

89 871 16 TSF‐Distributor with themostat

Frost protection of plate on the surface during the build‐ing‐time


89 872 21 TSFR 120‐0.18Ω 2450W/230V

89 872 23 TSFR 220‐0.18Ω 4040W/400V

Construction

Sheath in PVC

Conductor/Return‐wire with insulation in 105°C PVC


13

TRM HCHH ‐ Type of cable: Series resistive, Mineral insulated without return‐wire


Frost protection and heating up ground surfaces. Roof gutters and concrete surfaces outdoors.

HCHH have an outer sheath of corrosions toughened HDP‐rubber.

Are supplied as ready elements with cold‐lead‐in cable.

Technical data:

Basic type ..................................... LG acc. to SEN 242421


................................................................ VDE (Germany)

Rated voltage ......................................................... 440 V

Resistance values ...................................... acc. to Table 1

Operating temperature ................................. max +90 °C

Max. Load ...................................... 40W/m (in concrete)

.......................................................... 30W/m(Sand, air..)


Bending radius ................................................ min 30mm

Diameter ................................................... 5‐6 x diameter



Weight (kg/km) Ø (mm)

Part.no

2.0 41/4.6 HCHH1M2000

1.25 42/4.6 HCHH1M1250

0.80 60/4.9 HCHH1M800

0.63 77/5.4 HCHH1M630

0.45 78/5.5 HCHH1M450

0.315 83/6.0 HCHH1M315

0.22 97/5.9 HCHH1M220

0.14 114/6.3 HCHH1M140

0.10 146/6.8 HCHH1M100

Construction

Sheath in HDP

Copper and Copper‐Nickel

(HDFF)

Magnesium oxide

Copper and copper alloy


VELOX SIP/PVC ‐ Type of cable: Series resistive, Double insulated, Class II


Switchpoint heating.

Velox SIP is a double insulated series resistive cable for connections up to 1000 VDC.

Technical data:

Basic type/Manufactured acc. to ................ VDE/IEC 800

Colour:.............................................. White outer sheath

Test voltage ........................................................... 3000V

Supply voltage ...................................... 750v/max 1000V

Output .............................................................. Ohms law

Max ambient temperature ...................................... 20°C

Max Exposure temperature ................................... 130°C

Lowest installation temp............................................. ‐10

Lowest bending radius ............................................. 6 x Ø

Diameter ..................................................... 4.5 / 5.0 mm ........................................................... depending on load

Weight ...................................... approx. 80‐90 kg/1000m

Part.no ............................................ SIP……….(+ Ω‐value)

Denomination: .................... Velox SIP + resistance‐value

SIP is manufactured with a sheath of PVC/Polyurethane

Table 1:

Type of cable Output (W/m)

Length max* (m)

VELOX SIP/PVC 50 W/m 50 W

* at 10% power loss.

Construction

Available resistance values

0.03 Ω 0.18 Ω 0.25 Ω 0.36 Ω 0.45 Ω 0.65 Ω 0.82 Ω 1.00 Ω

High temperature PVC/Polyurethane

High temperature Sili‐cone

Resistance‐wire


15

Velox SIP/PFA – Cable type: Series resistive, double insulated, Class II


Switchpoint heating and power rail heating.

Velox SIP is a double insulated series resistive heat‐ing cable for connections up to 1000 VDC.

Technical data:

Manufacturing std/Basic type .................... VDE/IEC 800

Colour: .............................................. White outer sheath

Test voltage .......................................................... 3000V

Supply voltage ...................................... 750v/max 1000V

Output ............................................................. Ohms law

Max ambient temperature. ...................................... 20°C

Max exposure temperature ....................................130°C

Lowest installation temp. ........................................... ‐10

Lowest bending radius ............................................. 6 x Ø

Diameter ..................................................... 4.5 / 5.0 mm ........................................................... depending on load

Weight ..................................... approx. 80‐90 kg/1000m

Part.no ........................................ SIP/PFA…….(+ Ω‐value)

Denomination: .................... Velox SIP + resistance‐value

SIP/PFA are manufactured with a sheath of PFA.

Table 1:


Length max* (m)

VELOX SIP/PVC 80 W/m Ohms law


Construction

High temperature PFA

High temperature Sili‐cone

Resistance‐wire


SELF‐LIMITING HEATING CABLES Self‐limiting cables can be bought in running metre for make‐up on the site. The cable has a varying output depending on the ambient temperature, which guard against overheating even if the cable crosses itself. This also allows installation in Ex‐surfaces (all Värmekabeltekniks self‐limiting cable types are Ex‐rated).

The self‐limiting cable have a unique capacity in proportion to the sheath temperature of the cable, reduce the emitted out‐put. These cables are often mentioned as self‐regulated cables but this is a wrong denomination, as a required temperature not can be guaranteed without temperature control.

On the other hand, the cables make it possible to give an even temperature on a pipe even if the ambient temperature varies along piping.

Värmekabeltekniks self‐limiting cables are approved within Ex‐surfaces when the cables have a stated T‐rate, i.e. a maximum temperature that the cable reach. The T‐rates varies for different output/m.

The self‐limiting cables are built up round a semi‐conductive bed embedded in the outer edges. The bed between the con‐ductors has a capacity to lead current, the conducting capacity is in proportion to the temperature. At rising temperature the conducting capacity decreases, overheating is prevented. At sinking temperature, the current increases and the increasing heat requirement is satisfied.

- RSL Frost protection cables, have a primary insulation and an outer sheath of thermo‐plastic rubber (CR) or teflon (CT).

‐ RSM cables for keeping warm and heating up to 120°C, has an insulation and outer sheath of Teflon.

‐ RSH cables for keeping warm and heating up to 190°C, has an insulation and outer sheath of teflon.

The emitted outputs of the self‐limiting cables are depending on the ambient temperature and the method of installation, a good dissipation of heat increase the emitted output. (Aluminium tape that covers all the length of the cable and is attached against the pipe, cool down the side of the cable, which borders against the insulation and thereby, emitted output with 30‐50%).

All self‐limiting cables have a starting current which is higher than the operating current. This must be taken into consid‐eration when designing circuit‐/connection lengths, (see data sheet).

Index Self‐limiting cables

Cable Page

BTL‐10 .................................................................. 17 BTL Floorheat ....................................................... 18 BTL‐N ............................................................... 19‐20 SAFE‐T .................................................................. 21 RSL ................................................................ 22‐23 RSM ................................................................ 24‐25 RSH ................................................................ 26‐27 AQUA‐55 ......................................................... 28‐29 AQUA‐60 ......................................................... 30‐31 VELOX ORIGO30‐110/120 .................................... 32 VELOX ORIGO30‐230/240 .................................... 33 VELOX ORIGO30‐DC ............................................. 34


17

Velox BTL‐10 ‐ Type of cable: Self‐limiting


Frost protection of pipes, tanks.

Technical data:

Basic type .............................. 65 CM acc. to SS 424 24 11

Tested and approved by ..................... SEMKO (Sweden)

................................................................... SETI (Finland)

........................................................................... UL (USA)

........................................................... Det norske Veritas

................................................................. Bureau Veritas

Rated voltage ................................................ 220 ‐ 240 V

Output W/m ................................................00C‐ 12 W/m

.............................................................. + 10 0C ‐ 10 W/m

............................................................... + 650C ‐ 2 W/m

Max. cable length for

max 20% Power loss ......................................... 97 meter

Installation temperature.................................. min ‐200C


Size ............................................................. 7.5 x 5.0 mm

Weight ........................................................ 65 kg/1000m

Part.no. ............................................................ 89 861 30

Max. cable length based on fuse and start-up temperature. Supply voltage 220/240 V.

Table 1:

Fusing Cable length/Start temperature‐30°C 0°C +10°C

10A 70m 110m 135m16A 105m 175m 195m

Maximum length per loop depending on voltage drop in the conductors

Maximum length per installed length:

100 meter at external application 60 meter at internal application in water pipes

Konstruktion

Conductors Cu 1.3mm²

(16 AWG) Semi‐conductive material with self‐limiting characte‐ristics (the resistance in‐creases with rising temper‐ature)

Armouring layer of ther‐moplastic rub‐ber (CR)

Armouring Cu

Sheat in thermoplas‐tic rubber (CR) or Teflon (CT)


Velox BTL Floorheat ‐ Type of cable: Self‐limiting


Floor heating.

Technical data



.................................................................. SETI (Finland)

........................................................................... UL (USA)

........................................................... Det Norske Veritas

................................................................. Bureau Veritas

Rated voltage ................................................ 220 ‐ 240 V

Output W/m ........................................................ + 200C ≈ ..................................................................... 18‐20 W/m



Installation temperature.. ................................ min ‐150C

Bending radius .............................................. min 25 mm

Size ............................................................. 7.5 x 5.0 mm

Weight ........................................................ 65 kg/1000m

Part.no. ............................................................ 89 861 50


Table 1

Fusing Cable length/Start temperature

‐20°C 0°C +10°C +20°C

10A 37m 44m 72m 79m

16A 60m 77m 127m 140m

Construction

Conductors

Semi‐conductive material with self‐limiting characte‐ristics (the resistance in‐creases with rising temper‐ature)

Armouring layer

Armouring 1.5mm²

Sheath in TPE


19

Velox BTL10 N ‐ Type of cable: Self‐limiting


Frost protection of pipes, tanks below +65oC.

Technical data:

Basic type ............................................................... 65 CM ......................................................... acc. to SS 424 24 11


.................................................................. SETI (Finland)

Rated voltage ................................................. 220 ‐ 240 V

Process temp. ............................................................. (Tp)

‐ Cable on .............................................(Tpon) max +65oC

‐ Cable off............................................. (Tpoff) max +85oC



Size ........................................................... 11.1 x 4.8 mm

Weight ...................................................... 118 kg/1000m

BTL N is manufactured with a sheath of teflon (CT).

Table 1

Type of cable

Output +10°C (W/m)

Length max* (m)

BTL-N 10 211

* at 10% power loss

Construction

Conductors


Armouring layer of thermoplastic rubber (CR)

Armouring 1.5mm²

Sheath in Teflon (CT)


Velox BTL10 N ‐ Type of cable: Self‐limiting

Max. cable lenghts based on fuse and start/up temperature. Supply voltage 220/240 V.

Fuses loaded with 0.8 x nominal current.

Table 2: 10 Ampere

Type of cable

Max cable length/Start temperature

-20°C 0°C +10°C +20°C

BTL-N 62m 73m 80m 89m

Table 4: 20 Ampere

Type of cable

Max. cable length/Start temperature

-20°C 0°C +10°C +20°C

BTL-N 123m 145m 160m 178m

Table 3: 16 Ampere

Type of cable

Max. Cable length/Start temperature

-20°C 0°C +10°C +20°C

BTL-N 98m 116m 128m 142m

0

5

10

15

20

25

30

35

40

-20 -10 0 10 20 30 40 50 60 70

Avgi

ven

effe

kt W

Rör temperatur °C

VELOX BTL

BTL-10

FLOOR HEAT

SAFE-T


21

Velox Safe‐T ‐ Kabeltyp: Självbegränsande


Roof applications.

Technical data:



................................................................... SETI (Finland)

........................................................................... UL (USA)

........................................................... Det norske Veritas

................................................................. Bureau Veritas

Rated voltage ................................................ 220 ‐ 240 V

Output W/m .................................. ‐100C i luft ≈ 22 W/m

.......................................................... 0°C i luft ≈ 19 W/m

..................................................... + 65°C i luft ≤ 2 W/m

........................................................ 0°C i is/vatten ≈ 36 W/m



Installation temperature.................................. min ‐200C


Size ........................................................... 11.1 x 5.0 mm

Weight ...................................................... 118 kg/1000m

Part.no. ............................................................ 89 861 45


Fusing Cable length/Start temperature

-20°C 0°C +10°C

10A 30m 40m 50m

16A 48m 64m 78m

20A 60m 80m 97m

Construction

Conductors



Armouring 1.5mm²

Sheath in Teflon (CT)


Velox TTS super‐ Type of cable: Self‐limiting

• Self‐regulating

• 7 power output ranges

• Cut to length


Velox Super is a construction and industrial grade self‐regulating heating tape that may be used for frost pro‐tection, or temperature maintenance of pipework and vessels.

Function:

Self‐regulating heating cables consist of two parallel buswires, embedded semi‐conductive self‐regulating matrix. This means that the heating cable automatically responds to changes in ambient conditions.

With increase in temperature, the synthetic material expands by molecular force, and the connections be‐tween the carbon particles diminish, reducing the load. Conversely, as the temperature decreases, so the load increases as the connections between the carbon parti‐cles increases accordingly.

Thus, the heating power varies according to the tem‐perature surface of the surface the heating cable is applied to.

Self‐regulating heating cables will not overheat or burn‐out – even when overlapped.

Technical data:

Maximum exposure temperature (unpowered) .. 200°C** maximal 1000 hours exposure time

Maximum operating temperature (powered) ....... 120°C

Nominal voltage ............................................. 220 ‐ 240 V ............................................... (120 V available on order)

Minimum bending radius. .....................................25 mm

Minimum installation temperature ........................ ‐30oC

Maximum resistance of braid .................. 18.2 Ohms/km

T‐rating. ........................................................................ T3

Construction

1.25mm² Buswires

Semi‐conductive material with self‐limiting characteris‐tics (the resistance increases with ris‐ing temperature)

Insulation

Earth braiding tinned copper

Sheath in fluoropo‐lymer


23

Velox TTS super ‐ Type of cable: Self‐limiting

Part.no Power output on insulated metal pipes at 10°C

Maximum ambient ener‐gised

Permissabgle temperature de‐energised

Earth Braid Description

Nominal di‐mensions

Nominal weight

(W/m) (°C) (°C) (mm) Kg/100m10TTS‐2‐B 10 120 200 TC 9.5 x 4.0 1210TTS‐2‐BOT 10 120 200 TC 10.5 x 5.0 1215TTS‐2‐B 15 120 200 TC 9.5 x 4.0 1215TTS‐2‐BOT 15 120 200 TC 10.5 x 5.0 1220TTS‐2‐B 20 120 200 TC 9.5 x 4.0 1220TTS‐2‐BOT 20 120 200 TC 10.5 x 5.0 1225TTS‐2‐B 25 120 200 TC 9.5 x 4.0 1225TTS‐2‐BOT 25 120 200 TC 10.5 x 5.0 1230TTS‐2‐B 30 120 200 TC 9.5 x 4.0 1230TTS‐2‐BOT 30 120 200 TC 10.5 x 5.0 1245TTS‐2‐B 45 120 200 TC 9.5 x 4.0 1245TTS‐2‐BOT 45 120 200 TC 10.5 x 5.0 1260TTS‐2‐B 60 120 200 TC 9.5 x 4.0 1260TTS‐2‐BOT 60 120 200 TC 10.5 x 5.0 12

TC = Tinned copper ‐ B = Tinned copper braid ‐ BOT = Braid and fluoropolymer o verjacket Temperature/Loading diagram TTS

TTS exposure up to 200°C (maximal 1000 hours exposure time)

Start‐up temp 230V 120V16A 20A 30A 16A 20A 30A

10 TTS +10‐25

200175

235235

100 89

120120

15 TTS +10‐25

165117

189152

189

80 56

9575 95

20 TTS +10‐25

135100

160130

160

67 50

8065 80

25 TTS +10‐25

12088

140120

140

60 44

6959 69

30 TTS +10‐25

8569

11492

114

44 35

5845 58

45 TTS +10‐25

7049

8266

82

35 24

4133 41

60 TTS +10‐25

5038

6452

64

25 20

3225 32

Maximum recommended length of heating circuit at 230VAC using Type‐C circuit breakers

Product ordering information:

Power output + TTS‐Voltage‐(Overjacket)

Example: 60 W/m@10°C with tinned copper braiding and fluoropolymer jacket (230V):

60 TTS‐2‐BOT

Example: 15 W/m@10°C with only insulation (120V):

15 TTS‐1

B: tinned copper braid BOT: Braid and fluoropolymer overjacket.


Velox TTR Regular ‐ Type of cable: Self‐limiting

• Self‐regulating

• 4 power output ranges

• Proprietary bonded jacket


Velox Regulator is a construction and industrial grade self‐regulating heating cable that may be used for frost protection, or low temperature maintenance of pipe‐work and vessels.

Function:

Self‐regulating heating cables consist of two parallel buswires, embedded semi‐conductive self‐regulating matrix. This means that the heating cable automatically responds to changes in ambient conditions.

With increase in temperature, the synthetic material expands by molecular force, and the connections be‐tween the carbon particles diminish, reducing the load. Conversely, as the temperature decreases, so the load increases as the connections between the carbon parti‐cles increases accordingly.

Thus, the heating power varies according to the tem‐perature surface of the surface the heating cable is applied to.

Self‐regulating heating cables will not overheat or burn‐out – even when overlapped.

Technical data:

Maximum exposure temperature (unpowered) .... 85°C** maximal 1000 hours exposure time

Maximum operating temperature (powered) ......... 65°C

Nominal voltage ...................................................... 230 V ............................................... (120 V available on order)

Minimum bending radius. .....................................25 mm

Minimum installation temperature ........................ ‐30oC

Maximum resistance of braid .................. 18.2 Ohms/km

T‐rating.10,15,25 W/m ................................................ T6

T‐rating 10,15,25 W/m ................................................. T5

Construction

1.25mm² Buswires

Semi‐conductive material with self‐limiting characteris‐tics (the resistance increases with ris‐ing temperature)

Insulation

Earth braiding tinned copper

Sheath in fluoropo‐lymer or thermoplas‐ic


25

Velox TTR Regular‐ Type of cable: Self‐limiting

Part.no Power output on insulated metal pipes at 10°C

Maximum ambient ener‐gised

Permissabgle temperature de‐energised

Earth Braid Description

Nominal di‐mensions

Nominal weight

(W/m) (°C) (°C) (mm) Kg/100m10TTR‐2‐BO 10 65 85 TC 11.5 x 5.5 1210TTR‐2‐BOT 10 65 85 TC 11.5 x 5.5 1215TTR‐2‐BO 15 65 85 TC 11.5 x 5.5 1215TTR‐2‐BOT 15 65 85 TC 11.5 x 5.5 1225TTR‐2‐BO 25 65 85 TC 11.5 x 5.5 1225TTR‐2‐BOT 25 65 85 TC 11.5 x 5.5 1233TTR‐2‐BO 33 65 85 TC 11.5 x 5.5 1233TTR‐2‐BOT 33 65 85 TC 11.5 x 5.5 12

TC = Tinned copper ‐ BO = Braid and thermoplastic overjacket ‐ BOT = Braid and fluoropolymer overjacket Temperature/Loading diagram TTR

Surface temperature on insulated metal pipes (°C)

TTR exposure up to 85°C

Start‐up temp 230V 120V16A 20A 30A 16A 20A 30A

10 TTR +10‐15 ‐25

205140123

186 165

195 195

95 69 60

90 81

95 95

15 TTR +10‐25 ‐25

14593 82

162125 111

160 160

67 45 40

8061 54

80 80

25 TTR +10‐15 ‐25

8860 50

11775 70

126 117 105

43 27 27

5833 33

6351 51

33 TTR +10‐15 ‐25

7050 45

9065 58

108 95 85

33 25 22

4533 30

5453 43

Maximum recommended length of heating circuit at 230VAC using Type‐C circuit breakers

Product ordering information:

Power output + TTR‐Voltage‐(Overjacket)

Example: 33 W/m@10°C with tinned copper braiding and fluoropolymer jacket (230V):

33 TTR‐2‐BOT

Example: 15 W/m@10°C with only insulation (120V):

15 TTR‐1

B: tinned copper braid BO: Braid and thermoplastic overjacet BOT: Braid and fluoropolymer overjacket.


Velox AQUA – Type of cable: Self‐limiting


Frost protection and temperature maintenance of hot‐water pipes up to 55oC.

Cable data:


Approved, tested by ............................. SEMKO (Sweden)

.................................................................. SETI (Finland)

........................................................................... UL (USA)

........................................................... Det Norske Veritas

................................................................. Bureau Veritas

Connection voltage ........................................ 220 ‐ 240 V

Process temp.............................................................. (Tp)

‐ cable on.............................................. (Tpon) max +65oC

‐ cable off ............................................. (Tpoff) max +85oC

Installation temperature .................................. min ‐20oC


Dimension ................................................ 11.1 x 4.8 mm

Weight ...................................................... 118 kg/1000m

The AQUA‐cable is manufactured with a sheath of ther‐mo‐plastic rubber (CR) or tefon (CT).

Table 1

Type of cable

Power +10°C (W/m)

Length max* (m)

T-Class Part.no

AQUA 55 26 128 T5 8986190

AQUA 60 33 110 T5 89861906 * vid 10% effektbortfall

Construction

Conductors Cu 1.3mm² (AWG‐16)



Armouring

Cu

Sheath in thermo‐plastic rubber (CR) or Teflon (CT)


27

Velox AQUA – Type of cable: Self‐limiting

Max. cable lenghts based on fuse and start/up temperature. Supply voltage 220/240 V.

Fuses loaded with 0.8 x nominal current.

Table 2: 10 Ampere

Type of cable


-20°C 0°C +10°C +20°C

AQUA 55 19m 25m 31m 37m

AQUA 60 16m 18m 20m 21m

Table 4: 20 Ampere

Type of cable


-20°C 0°C +10°C +20°C

AQUA 55 38m 50m 62m 74m

AQUA 60 32m 37m 41m 43m

Table 3: 16 Ampere

Type of cable


-20°C 0°C +10°C +20°C

AQUA 55 30m 41m 49m 59m

AQUA 60 25m 29m 32m 34m


Velox switchpoint heating element ORIGO30‐110/120 ‐ Type of cable: Self‐limiting


Switchpoint heating at railways, tramways, sub‐ways.

Technical data:

Basic type .............................................................. Klass II

Manufactured acc. to ................................... VDE, IEC800

Cable class .......................................... Double insulated*

Test voltage ..................................................... 1500 V DC

Supply voltage ................................................. 110 /120V

Colour:................................................ Black outer sheath

Operating temperature ................. max. +120°C / +150°C

Exposure temperature .................. max. +160°C / +250°C

Installation temperature ................................ min – 20°C


Dimension ................................................. 11.5 x 6.5 mm

Weight ............................................................. 0.15 kg/m

Part.no: ................................................................. VX501

Denomination .......................... Velox ORIGO30‐110/120

Approved by Network Rail – Certification no. PA05100458

Velox ORIGO30‐110/120 is manufactured with a sheath of PFA.

Table 1:


Length max* (m)

VELOX ORIGO30 110/120 25


Construction

* Double insulated cable with each insulation layer thickness according to IEC:1995. R.M.S. 450/750 V. Min. requirement 0.60mm/layer.

Semi‐conductive ma‐terial with self‐limiting characteristics (the resistance increases with rising temperature)

Conductor2 x 1.3mm²

Insulation and outer sheath of fluorpolymer


29

Velox switchpoint heating element ORIGO30‐230/240 ‐ Type of cable: Self‐limiting


Switchpoint heating at railways, tramways, sub‐ways.

Technical data:

Basic type .............................................................. Class II

Manufactured acc. to .................................. VDE, IEC800

Cable class ........................................... Double insulated*

Colour: ................................................. Red outer sheath

Test voltage .................................................... 1500 V DC

Supply voltage ................................................ 230/240 V

Operating temperature ............................... max. +150°C

Exposure temperature ................................. max. +250°C

Installation temperature................................. min – 20°C

Output ........................................... vid 10°C ~ 100/130W


Diameter ................................................... 11.5 x 6.5 mm

Weight ............................................................. 0.15 kg/m

Part.no ................................................................... VX500

Denomination .......................... Velox ORIGO30‐230/240

ORIGO30‐230/240 is manufactured with a sheath of PFA.

Table 1:


Lengthmax* (m)

VELOX ORIGO30 100‐110** 25

* at 10% power loss. ** at 10°C

Construction

* Double insulated cable with each insulation layer

thickness according to IEC:1995. R.M.S. 450/750 V. Min. requirement 0.60mm/layer.





Velox switchpoint heating element ORIGO30‐DC ‐ Type of cable: Self‐limiting


Switchpoint heating at railways, tramways, subways

Technical data:

Basic type .............................................................. Klass II

Manufactured acc. to ................................... VDE, IEC800

Cable class .......................................... Double insulated*

Colour:................................................. Grey outer sheath

Test voltage ..................................................... 1500 V DC

Supply voltage .................................... DC. Nominal 750 V

Operating temperature ................................ max. +150°C

Exposure temperature ................................. max. +250°C

Installation temperature ................................ min – 20°C

Output/m ........................... vid 10°C ~ 100/130W – 750V


Diameter ................................................... 11.5 x 6.5 mm

Weight ............................................................. 0.15 kg/m

Part.no: ................................................................. VX502

Denomination ................................... Velox ORIGO30‐DC

Velox ORIGO30‐DC is manufactured with a sheath of PFA.

Table 1:


Length max* (m)

VELOX ORIGO30‐DC 100* 125


Construction

* Double insulated cable with each insulation layer thickness according to IEC:1995. R.M.S. 450/750 V. Min. requirement 0.60mm/layer..





31

PARALLEL RESISTIVE HEATING CABLES Parallel resistive cables can be bought as running metre for making‐up on the site. This admits a good flexibility both at new production and repairs. The cable has a constant output per metre irrespective of length and temperature and can be cut on regular distances, most often between 0.5 to 1.2 metres dependent on module lengths from different suppliers.

The heating element in a parallel resistive cable consists of a resistance wire which is coiled round the insulated front con‐ductors, at the so called contact points (these have been marked as waist on the outer side of the cable) have the resistance wire contact against one of the conductors alternating for each contact point.

The insulation material and the sheath consist normally of teflon material.

There is more detailed information in the cable data sheets.

The heating cable is designed with earth braid that also works as an armouring and corrosion protected sheath of teflon where this is not possible by high temperatures.

Parallel resistive heating cables gives a solid output per meter independent of the ambient temperature. They have no start‐ing current and can therefore be connected in relatively long lengths, (see cable data).

Index Parallel resistive cables

Cable Page

CWM ................................................................... 35-36 EST ................................................................... 37-38 PHB 240 VAC ...................................................... 39-40 PBH 70 ...................................................................... 41 PBH 70 ...................................................................... 42 PHB 750 VDC ........................................................... 43


Velox CWM ‐ Type of cable: Parallel resistive


Temperature maintenance and heating up piping, tanks, vents etc in plants at an operating temperature up to 120°C.

CWM can be installed at plants which are steam puri‐fied.

CWM has a sheath of corrosions toughened material (Teflon) and manages aggressive environmentals.

Technical data:

Basic type .................................. NG/NC enl. SEN 242421

Tested and approved by .................................... UL (USA)

......................................................................... CSA (USA)

Output ............................................................. Se Table 1

Zone length ..................................................... Se Table 1

Conductor area .................................................. 3.5 mm2

Rated voltage ......................................................... 440 V

Operating voltage .......................................... see Table 1

Process temperature. ......................................................

‐ Cable on .......................................... (Tpon) see diagram

‐ Cable off ........................................... (Tpoff) max +205oC

Installation temperature. ................................. min ‐30oC


Diameter ..................................................... 9.5 x 7.0 mm

Weight ...................................................... 170 kg/1000m

Construction

Table 1

Type of Cable Power (W/m)

Voltage (V)

Max. length (m)

Module length (mm)

CWM4-2C(T) 12/36 230/440 215/120 760

CWM8-2C(T) 24 230 160 610

CWM10-2C(T) 30 230 130 610

CWM12-2C(T) 36 230 120 610

Copper conductors – 3.5mm² (12 AWG)

Conductor insulation Teflon FEP 220°C

Resistance‐wire Nicrome

Armouring layer Teflon FEP 220°C

Armouring braided Cu



33

Velox CWM ‐ Type of cable: Parallel resistive

Sheath temperature



Q Tm = _____ +Tp

UA



Q = Load in W/m

U = Heat transfer coeff.

A = Sheath area per m cable (m²/m)

Cable without discharge: U* = 17‐28 W/m² _

With aluminium tape: U* = 57 W/m² ‐‐‐‐‐

* Observe that the heat transfer capacity is considerably improved with aluminium tape.

Diagram 1: Max output/m versus operating temp on horisontal axis

Maximum running metre output in relation to the proc‐ess temperature of the heating cable.

Heating cable of the type CWM can be used at varying supply voltages to obtain required output per running metre.

Type of cable Supply voltage Resistance/m Current/m (230V) 115V 230V 400V

CWM4-2CT 3.0 W/m 12 W/m 36 W/m 4400 Ω ± 10% 0.052 A/m

CWM8-2CT 6.0 W/m 24 W/m --- 2204 Ω ± 10% 0.104 A/m

CWM10-2CT 7.5 W/m 30 W/m --- 5760 Ω ± 10% 0.130 A/m

CWM12-2CT 9.0 W/m 36 W/m --- 1470 Ω ± 10% 0.156 A/m

Please contact VärmeKabelTeknik for assistance with design and installation if any questions!


Velox EST ‐ Type of cable: Parallel resistive


Temperature maintenance and heating of piping, tanks, vents etc in plants with operating temperatures up to 120oC.

EST can be installed at plants which are steam purified.

EST has a sheath of corrosions toughened material (tef‐lon) and manages aggressive environmentals.

Technical data:

Basic type .................................. NG/NC enl. SEN 242421


................................................................... SETI (Finland)

Output ........................................................... See Table 1

Zone length ................................................................ 1 m

Conductor area .................................................. 2.5 mm2

Rated voltage ......................................................... 440 V

Operating voltage ............................................ se Table 1

Process temperature. ................................................ (Tp)

‐ Cable on .......................................... (Tpon) max +120oC

‐ Cable off ........................................... (Tpoff) max +200oC



Diameter ..................................................... 9.5 x 7.0 mm

Weight ...................................................... 170 kg/1000m

Konstruktion

Table 1


Voltage (V)

Max.Length (m)

Part.no

EST30 30 230 120 89 852 55


Armouring, Braided Cu, 16x4x0.31mm

Armouring layer Teflon FEP

Resistance‐wire Kanthal DSD 0.10

Conductor insulationTeflon FEP 220°C

Conductors – Cu 2.5mm² 19 x 0.41mm


35

Velox EST ‐ Type of cable: Parallel resistive

Sheath temperature



Q Tm = _____ +Tp

Ua


Q = Load in W/m


Example:

Velox EST mounted without dissipation of heat at an ambient temperature of 25oC, output 30 W/m, will have a sheath temperature of 75oC.



Dissipation of heat

The heat transfer coefficient (Ua) can be improved considerably (3 to 10

times) by arranging some dissipation of heat, for instance by providing the cable with aluminium tape or heat conductive concrete at the installation. This will enable you to use the heating cable also where high process tem‐peratures are involved.

For this kind of installation please consult VärmeKabelTeknik for assistance with the design and installation.


Velox PH‐240 V AC ‐ Type of cable: Parallel resistive heating cable


Industrial heating: Pipes, tanks, cisterns.

PHB 240 VAC is teflon insulated and have a sheath of corrosions toughened material (teflon) which manages aggressive environments.

Technical data:

Manufacturing std. /Basic type ........... VDE 253 / EEC800

Tested and approved by .............................................. CE

Test voltage ..................................................... 3000 VDC

Rated voltage ........................................... 220 ‐ 240 VAC

Output ........................................................... 10W / 12W

...................................................................... 20W / 24W

...................................................................... 30W / 36W

Distance between contact points…1 meter

Max. operating temp.. ........................................... 150°C

Max. exposure temp.. ............................................ 200°C



Size ............................................................ 7,8 x 5,6 mm

Weight ..............................................................................

PHB is manufactured with a sheath of Flourplast.

Table 1:


Length max* (m)

VELOX PH240 -10 10 120

VELOX PH240-20 20 90

VELOX PH240-30 30 75 * at 10% power loss.

Construction

0 °C

50 °C

100 °C

150 °C

200 °C

250 °C

0 10 20 30 40 50 60 70 80 90 100 110 120 130 150

Man

telte

mpe

ratu

r

Process temperatur °C

VELOX PHB

PHB-10 Bare

PHB-10 Alu

PHB-20 Bare

PHB-20 Alu

PHB-30 Bare

PHB-30 Alu

Sheath 2 Fluorplast (FEP)

Sheath Fluorplast (FEP)

Screen copper alloy

Conductor NiCr

Conductor layer

Conductor insulation fluorplast

Conductor copper alloy 1.5mm²


37

Velox PH‐70 VAC Type of cable: Parallel resistive Double insulated

Range of application: Switch heating at rail-ways, subways, tramways.

PH‐70 is a parallel resistive, teflon insulated heating cable which can be cut at contact points every me‐ter.

Outer sheath made out of corrosive toughened material (teflon)

PH‐70 have double sheath and lacks earth screen.

Technical data:

Manufacturing std./Basic type ........... VDE 253 / EEC800

Approved, tested acc. to .............................................. CE

Colour: ............................................ Orange outer sheath

Test voltage ..................................................... 3000 VDC

Supply voltage ................ 220 / 240 VAC or 110/120 VAC

Output ........................................................... 70W / 84W

Distance between contact points: ...................... 1 meter

Max. Operating temperature .................................150°C

Max. exposure temperature. ..................................200°C



Diameter ................................................... 7,8 x 5,6 mm

Weight ........................................................ 75 kg/1000m

Part.no: ................................................. VX503 220‐240V

............................................................... VX50. 110‐120V

Denomination: ...................................... Velox PH‐70 VAC

PH‐70 is manufactured with a sheath of PFA.

Table 1:


Lengthmax* (m)

VELOX PHB‐70 70 52


Construction

Insulation

If two cables are installed parallel under same channel, standard channel you will have a constant wattage pa‐rallel resistance cable with output up to 200 W/m.

2 cables installed parallel under channel ref.no 6‐16‐1.

Sheath 2 Fluorplast

Sheath 1 Fluorplast

Bed for

heating con‐ductor

Heating conductor

Ni‐Cr

Conductor insulation

fluorplast

Conductor, tin‐coated Cu, 1.5mm²


Velox PH‐90 VAC ‐ Type of cable: Parallel resistive Double insulated


Switch heating at railways, subways, tramways.

PH‐90 is a parallel resistive, teflon insulated heating cable which can be cut at contact points every me‐ter.

Outer sheath made out of corrosive toughened material (teflon)

PH‐90 have double sheath and lacks earth screen.

Technical data:

Manufacturing std./Basic type ............ VDE 253 / EEC800

Approved, tested av ..................................................... CE

Colour:.................................................. Red outer sheath

Test voltage: ..................................................... 3000 VDC

Supply voltage ................................... 220 / 240 VAC eller

...................................................................... 110 / 120 V

Output ...................................................................... 90W

Distance between contact points: ................... 0.5 meter

Max. Operating temperature ................................. 150°C

Max. exposure temperature. ................................. 230°C

Installation temperature .................................. min ‐30oC


Diameter ................................................... 7,8 x 5,6 mm

Weight ........................................................ 75 kg/1000m

Part.no: .................................................. VX50 220‐240V

............................................................... VX50. 110‐120V

Denomination: ...................................... Velox PH‐90 VAC

PH‐90 is manufactured with a sheath of PFA.

Table 1:


Length max* (m)

VELOX PHB 90 90 52 * at 10% power loss.

Construction

Insulation


2 cables installed parallel under channel ref.no 6‐16‐1/F

Sheath 2 Fluorplast

Sheath 1 Fluorplast

Bed for


Heating conductor

Ni‐Cr


fluorplast



39

Velox PH‐750 VDC ‐ Type of cable: Parallel resistive Double insulated


Switch heating at railways, subways, tramways.

PH‐750 have a double sheath of corrosion hardened material (teflon) and manages aggressive environ‐mentals.

PH‐750 is double insulated without earth.

Technical data:

Basic type ............................................. VDE 253 /EEC800

Approved, tested av..................................................... CE

Colour: ..............................................Green outer sheath

Test voltage ..................................................... 3000 VDC

Supply voltage ................................................... 750 VDC

Output ............................................................... 70W / m

Distance between contact points ....................... 2 meter

Max. Operating temperature .................................180°C

Max. exposure temperature ...................................230°C



Diameter ................................................... 7,8 x 5,6 mm

Weight ........................................................ 75 kg/1000m

Part.no: .................................................................. VX504

Denomination: .................................... Velox PH‐750 VDC

Note: PH‐750 VDC is installed on 750 V with a channel of Glasfiber plastic.

Table 1:


Length max* (m)

VELOX PHB‐750 70 160


Construction

Insulation


2 cables installed parallel under channel ref.no 6‐18‐9

Sheath 2 Fluorplast

Sheath 1 Fluorplast

Bed for


Heating conductor

Ni‐Cr


fluorplast



TECHNICAL INFORMATION/REFERENCE DATA Corrosion guide for electric immersion heaters

The following corrosion guide recommendations must not be interpreted as a positive recommendation of your choice of sheath material for electrical immersion heaters. Use this information as a guide in your investi‐gation of your heating process, and arrive at the proper choice based upon your intimate knowledge of the con‐ditions which exist at the job site.

Be very selective in your consideration of heater sheath material. Remember that recommended materials of construction for your tank may not survive as sheathing for the immersion heater. The sheath of an immersion heater function as a heat transfer surface, and thus is operating at temperatures above the control tempera‐ture of the process. Such temperatures and fluid move‐ment impose severe corrosion conditions on the metal surface.

Success of your choise of sheath material will depend upon many factors which are within your power to con‐trol:

1) Control the chemistry of solution.. a. Avoid carry‐over from other processes. b. Control dpletion of bath chemistry. c. Filter or remove accumulating sludge. Sludge im‐ pedes flow of heat from heaters and accelerates cor‐ rosion.

2) Control process temperature. a. Temperature accelerates all corrosion processes. Excess temperatures mean shorter heater life.

3) Avoid contacts between dissimlar metals which could initiate galvanic type corrosion.

4) For safety to personnel against electrical shock, metal sheath heaters must be grounded to the tank and, in turn, to earth. Consider the use of a ground fault circuit interrupter for optimum safety.

5) For processes involving electroplating, immersion heaters must be kept out of the space between anode and cathode where the effects of plating cur‐rent may damage the heater surface.

6) The immersion heaters should be examined period‐ically for corrosion so that corrective action can be taken to maintain continuity of operation.

Notes and legends to corrosion guide

1. This solution involves a mixture of various chemical compounds whose identity and proportions are un‐known or subject to change without our knowledge. Check supplier to confirm choice of sheath material plus alternate sheath materials that may be used.

2. Caution – Flammable material.

3. Chemical composition varies widely. Check supplier for specific recommendations.

4. Direct immersion heaters not practical. Use clamp‐on heaters on outside surface of cast iron pot.

5. Element surface loading should not exceed 20 W/sq.inch.

6. For concentrations greater than 15%, element sur‐face loading should not exceed 20W/sq.inch.

7. See suggested watt density chart.

8. Remove crusts at liquid level.

9. Clean often.

10. Do not exceed 12wpsi.

11. Passivate stainless steel, Inconel and Incoloy

Because so many factors are beyond our control, the VärmeKabelTeknik company cannot be responsible for any electric immersion failure that can be attributed to corrosion. This is in lieu of any warranties, written or verbal, relative to heater performance in a corrosive environment.


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45



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53



TECHNICAL INFORMATION/REFERENCE DATA NEMA Type Enclosures for Electrical Equipment (1000 Volts Maximum).

The following descriptions are excerpts from NEMA's "Standards Publication/No. 250‐‐1985"

NON‐CLASSIFIED LOCATION ENCLOSURES Type 1 Enclosures Type 1 enclosures are intended for indoor use primarily to provide a de‐gree of protection against contact with the enclosed equipment in locations where unusual service conditions do not exist. The enclosures shall meet the rod entry and rust‐resistance design tests.

Type 2 Enclosures Type 2 enclosures are intended for indoor use primarily to provide a de‐gree of protection against limited amounts of falling water and dirt. These enclosures shall meet rod entry, drip, and rust‐resistance design tests. They are not intended to provide pro‐tection against conditions such as dust or internal condensation.

Type 3 Enclosures Type 3 enclosures are intended for outdoor use primarily to a degree of protection against windblown dust, rain and sleet; and to be undamaged by the formation of ice on the enclosure. They shall meet rain, external icing, dust, and rust‐resistance design tests. They are not intended to provide pro‐tection against conditions such as in‐ternal condensation or internal icing. Type 3R Enclosures Type 3R enclosures are intended for outdoor use primarily to provide a degree of protection against falling rain; and to be undamaged by the for‐mation of ice on the enclosure. They shall meet rod entry, rain, external icing, and rust‐resistance design tests. They are not intended to provide pro‐tection against conditions such as dust, internal condensation, or internal icing.

Type 3S EnclosuresType 3S enclosures are intended for outdoor use primarily to provide a degree of protection against wind‐blown dust, rain and sleet and to pro‐vide for operation of external mecha‐nisms when ice laden. They shall meet rain, dust, external icing, and rust‐resistance design tests. They are not intended to provide protection against conditions such as internal condensa‐tion or internal icing. Type 4 Enclosures Type 4 enclosures are intended for indoor or outdoor use primarily to provide a degree of protection against windblown dust and rain, splashing water,and hose‐directed water; and to be undamaged by the formation of ice on the enclosure. They shall meet hosedown, external icing, and rust‐resistance design tests. They are not intended to provide protection against conditions such as internal condensa‐tion or internal icing.

Type 4X Enclosures Type 4X enclosures are intended for indoor or outdoor use primarily to provide a degree of protection against corrosion, windblown dust and rain, splashing water, and hose‐directed water; and to be undamaged by the formation of ice on the enclosure. They shall meet the hosedown, external icing, and corrosion‐resistance design tests. They are not intended to provide protection against conditions such as internal condensation or internal icing.

Type 5 Enclosures Type 5 enclosures are intended for indoor use primarily to provide a de‐gree of protection against settling air‐borne dust, falling dirt, and dripping non‐corrosive liquids. They shall meet drip, settling air‐borne dust, and rust‐resistance design tests. They are not intended to provide protection against internal condensation.

Type 6 Enclosures Type 6 enclosures are intended for indoor or outdoor use primarily to provide a degree of protection against the entry of water during temporary submersion at a limited depth; and to be undamaged by the formation of ice on the enclosure. They shall meet submersion, external icing, and rust‐resistance design tests. They are not intended to provide protection against conditions such as internal condensa‐tion, internal icing, or corrosive envi‐ronments.

Type 6P Enclosures Type 6P enclosures are intended for indoor or outdoor use primarily to provide a degree of protection against the entry of water during prolonged submersion at a limited depth; and to be undamaged by the formation of ice on the enclosure. They shall meet air pressure, external icing, and corrosion‐resistance design tests. They are not intended to provide protection against conditions such as internal condensa‐tion or internal icing.


55

TECHNICAL INFORMATION/REFERENCE DATA NEMA Type Enclosures for Electrical Equipment (1000 Volts Maximum).

The following descriptions are excerpts from NEMA's "Standards Publication/No. 250‐‐1985"

Type 11 Enclosures Type 11 enclosures are intended for indoor use primarily to provide a de‐gree of protection against the corrosive effects or liquids and gases. In addition, they protect the enclosed equipment against the corrosive effects of fumes and gases by providing for immersion of the equipment in oil. They shall meet drip and corrosion‐resistance design tests. They are not intended to provide protection against conditions such as internal condensation or inter‐nal icing.

Type 12 Enclosures Type 12 enclosures are intended for indoor use primarily to provide a de‐gree of protection against dust, falling dirt, and dripping noncorrosive liquids. They shall meet drip, dust, and rust‐resistance design tests. They are not intended to provide protection against conditions such as internal condensa‐tion.

Type 12K EnclosuresType 12K enclosure with knockouts are intended for indoor use primarily to provide a degree of protection against dust, falling dirt, and dripping noncor‐rosive liquids other than at knockouts. They shall meet drip, dust, and rust‐resistance design tests. Knockouts are provided only in the top or bottom walls, or both. After installation of the enclosure, the knockout areas shall meet the environmental characteristics listed above (see NEMA "Standards Publication/No. 250‐1985"). They are not intended to provide protection against conditions such as internal condensation.

Type 13 Enclosures Type 13 enclosures are intended for indoor use primarily to provide a de‐gree of protection against dust, spray‐ing of water, oil and noncorrosive cool‐ant. They shall meet oil exclusion and rust‐resistance design tests. They are not intended to provide protection against conditions such as internal condensation.

CLASSIFIED LOCATIONENCLOSURES

Type 7 Enclosures Type 7 enclosures are for indoor use in locations classified as Class I, Groups A, B, C, or D, as defined in the National Electrical Code.

Type 8 Enclosures Type 8 enclosures are for indoor or outdoor use in locations classified as Class I, Groups A, B, C. or D, as defined in the National Electrical Code.

Type 9 Enclosures Type 9 enclosures are intended for indoor use in locations classified as Class II, Groups E, or G, as defined in the National Electrical Code. (Group F was reinstated in the 1987 NEC).

Type 10 Enclosures (MSHA) Type 10 enclosures shall be capable of meeting the requirements of the Mine Safety and Health Administra‐tion, 30 C.F.R., Part 18


TECHNICAL INFORMATION/REFERENCE DATA


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Telephone: +46‐301‐418 40 – Email: [email protected] – Homepage: www.vkts.se

Industrihuset Södra Hedensbyn 43

S‐430 64 HÄLLINGSJÖ S‐931 91 SKELLEFTEÅ

Sweden Sweden

Fax: +46‐301‐418 70 Fax: +46‐910‐881 33

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